From 6753eeab8b2f28c0736d0ba446e3b6f854aa1ec2 Mon Sep 17 00:00:00 2001
From: Marek Bachmann <marek.bachmann@comtec.eecs.uni-kassel.de>
Date: Mon, 5 Dec 2022 03:27:51 +0100
Subject: [PATCH 01/21] First draft for using a image grid to display attached
 images.

---
 src/Model/Item.php                           | 37 ++++++++++++++++-
 view/templates/content/image_grid.tpl        | 14 +++++++
 view/templates/content/image_grid_column.tpl |  1 +
 view/theme/frio/css/image_grid.css           | 43 ++++++++++++++++++++
 4 files changed, 94 insertions(+), 1 deletion(-)
 create mode 100644 view/templates/content/image_grid.tpl
 create mode 100644 view/templates/content/image_grid_column.tpl
 create mode 100644 view/theme/frio/css/image_grid.css

diff --git a/src/Model/Item.php b/src/Model/Item.php
index 8026d567c..1fff0a586 100644
--- a/src/Model/Item.php
+++ b/src/Model/Item.php
@@ -2991,6 +2991,7 @@ class Item
 		$a = DI::app();
 		Hook::callAll('prepare_body_init', $item);
 
+
 		// In order to provide theme developers more possibilities, event items
 		// are treated differently.
 		if ($item['object-type'] === Activity\ObjectType::EVENT && isset($item['event-id'])) {
@@ -3049,6 +3050,7 @@ class Item
 		$item['body'] = self::replaceVisualAttachments($attachments, $item['body'] ?? '');
 
 		$item['body'] = preg_replace("/\s*\[attachment .*?\].*?\[\/attachment\]\s*/ism", "\n", $item['body']);
+
 		self::putInCache($item);
 		$item['body'] = $body;
 		$s = $item["rendered-html"];
@@ -3082,7 +3084,10 @@ class Item
 			'filter_reasons' => $filter_reasons
 		];
 		Hook::callAll('prepare_body', $hook_data);
-		$s = $hook_data['html'];
+		// Remove old images
+		$hook_data['html'] = preg_replace('|(<a.*><img.*>.*</a>)|', '', $hook_data['html']);
+		$grid = self::make_image_grid($hook_data);
+		$s = $hook_data['html'] . $grid;
 		unset($hook_data);
 
 		if (!$attach) {
@@ -3126,6 +3131,36 @@ class Item
 		return $hook_data['html'];
 	}
 
+	private function make_image_grid(array &$data)
+	{
+		$item = $data['item'];
+		if ($item['has-media']) {
+			$attachments = Post\Media::splitAttachments($item['uri-id'], [], $item['has-media'] ?? false);
+			if (count($attachments['visual']) > 1) {
+				$img_tags = array();
+				foreach ($attachments['visual'] as $attachment) {
+					$src_url = Post\Media::getUrlForId($attachment['id']);
+					$preview_url = Post\Media::getPreviewUrlForId($attachment['id'], ($attachment['width'] > $attachment['height']) ? Proxy::SIZE_MEDIUM : Proxy::SIZE_LARGE);
+					$img_tag = array(
+						'$image' => [
+							'src' => $src_url,
+							'preview' => $preview_url,
+							'attachment' => $attachment,
+					]);
+					$img_tags[] = $img_tag;
+				}
+				$img_grid = Renderer::replaceMacros(Renderer::getMarkupTemplate('content/image_grid.tpl'), [
+					'columns' => [
+						'fc' => $img_tags[0],
+						'sc' => $img_tags[1],
+					],
+				]);
+				return $img_grid;
+			}
+		}
+
+	}
+
 	/**
 	 * Check if the body contains a link
 	 *
diff --git a/view/templates/content/image_grid.tpl b/view/templates/content/image_grid.tpl
new file mode 100644
index 000000000..7a06d3372
--- /dev/null
+++ b/view/templates/content/image_grid.tpl
@@ -0,0 +1,14 @@
+<link rel="stylesheet" href="view/theme/frio/css/image_grid.css" type="text/css" media="screen"/>
+
+<div id="row" class="row">
+	<div class="column">
+        {{foreach $columns.fc as $img}}
+        	{{include file="content/image.tpl" image=$img}}
+		{{/foreach}}
+	</div>
+	<div class="column">
+        {{foreach $columns.sc as $img}}
+    	    {{include file="content/image.tpl" image=$img}}
+		{{/foreach}}
+	</div>
+</div>
\ No newline at end of file
diff --git a/view/templates/content/image_grid_column.tpl b/view/templates/content/image_grid_column.tpl
new file mode 100644
index 000000000..6a58a4bda
--- /dev/null
+++ b/view/templates/content/image_grid_column.tpl
@@ -0,0 +1 @@
+<div class="column">{{$images}}</div>
\ No newline at end of file
diff --git a/view/theme/frio/css/image_grid.css b/view/theme/frio/css/image_grid.css
new file mode 100644
index 000000000..dd29dd201
--- /dev/null
+++ b/view/theme/frio/css/image_grid.css
@@ -0,0 +1,43 @@
+* {
+	box-sizing: border-box;
+}
+
+.row {
+	display: -ms-flexbox; /* IE10 */
+	display: flex;
+	-ms-flex-wrap: wrap; /* IE10 */
+	flex-wrap: wrap;
+	padding: 0 4px;
+}
+
+/* Create four equal columns that sits next to each other */
+.column {
+	-ms-flex: 50%; /* IE10 */
+	flex: 50%;
+	max-width: 50%;
+	padding: 0 4px;
+}
+
+.column img {
+	margin-top: 8px;
+	vertical-align: middle;
+	width: 100%;
+}
+
+/*!* Responsive layout - makes a two column-layout instead of four columns *!*/
+/*@media screen and (max-width: 50px) {*/
+/*	.column {*/
+/*		-ms-flex: 50%;*/
+/*		flex: 50%;*/
+/*		max-width: 50%;*/
+/*	}*/
+/*}*/
+
+/* Responsive layout - makes the two columns stack on top of each other instead of next to each other */
+@media screen and (max-width: 150px) {
+	.column {
+		-ms-flex: 100%;
+		flex: 100%;
+		max-width: 100%;
+	}
+}
\ No newline at end of file

From fbd4b5465606b3930489f91edcd3ef83026372a1 Mon Sep 17 00:00:00 2001
From: Marek Bachmann <marek.bachmann@comtec.eecs.uni-kassel.de>
Date: Mon, 5 Dec 2022 04:23:34 +0100
Subject: [PATCH 02/21] Support more than 2 images

---
 src/Model/Item.php                    | 16 ++++++++++++----
 view/templates/content/image_grid.tpl | 12 ++++++++----
 2 files changed, 20 insertions(+), 8 deletions(-)

diff --git a/src/Model/Item.php b/src/Model/Item.php
index 1fff0a586..152543b91 100644
--- a/src/Model/Item.php
+++ b/src/Model/Item.php
@@ -3137,7 +3137,9 @@ class Item
 		if ($item['has-media']) {
 			$attachments = Post\Media::splitAttachments($item['uri-id'], [], $item['has-media'] ?? false);
 			if (count($attachments['visual']) > 1) {
-				$img_tags = array();
+				$img_tags_fc = array();
+				$img_tags_sc = array();
+				$count = 0;
 				foreach ($attachments['visual'] as $attachment) {
 					$src_url = Post\Media::getUrlForId($attachment['id']);
 					$preview_url = Post\Media::getPreviewUrlForId($attachment['id'], ($attachment['width'] > $attachment['height']) ? Proxy::SIZE_MEDIUM : Proxy::SIZE_LARGE);
@@ -3147,12 +3149,18 @@ class Item
 							'preview' => $preview_url,
 							'attachment' => $attachment,
 					]);
-					$img_tags[] = $img_tag;
+					if ($count % 2 == 0) {
+						$img_tags_fc[] = $img_tag;
+					} else {
+						$img_tags_sc[] = $img_tag;
+					}
+					++$count;
 				}
+
 				$img_grid = Renderer::replaceMacros(Renderer::getMarkupTemplate('content/image_grid.tpl'), [
 					'columns' => [
-						'fc' => $img_tags[0],
-						'sc' => $img_tags[1],
+						'fc' => $img_tags_fc,
+						'sc' => $img_tags_sc,
 					],
 				]);
 				return $img_grid;
diff --git a/view/templates/content/image_grid.tpl b/view/templates/content/image_grid.tpl
index 7a06d3372..1a8648d18 100644
--- a/view/templates/content/image_grid.tpl
+++ b/view/templates/content/image_grid.tpl
@@ -2,13 +2,17 @@
 
 <div id="row" class="row">
 	<div class="column">
-        {{foreach $columns.fc as $img}}
-        	{{include file="content/image.tpl" image=$img}}
+        {{foreach $columns.fc as $fc}}
+        	{{foreach $fc as $img}}
+	        	{{include file="content/image.tpl" image=$img}}
+			{{/foreach}}
 		{{/foreach}}
 	</div>
 	<div class="column">
-        {{foreach $columns.sc as $img}}
-    	    {{include file="content/image.tpl" image=$img}}
+        {{foreach $columns.sc as $sc}}
+			{{foreach $sc as $img}}
+				{{include file="content/image.tpl" image=$img}}
+			{{/foreach}}
 		{{/foreach}}
 	</div>
 </div>
\ No newline at end of file

From 733543505be2345b1a763b4924413569193773cc Mon Sep 17 00:00:00 2001
From: Marek Bachmann <marek.bachmann@comtec.eecs.uni-kassel.de>
Date: Mon, 5 Dec 2022 16:54:12 +0100
Subject: [PATCH 03/21] Merge branch 'develop' into new_image_presentation

---
 database.sql                                  | 133 +++--
 doc/FAQ.md                                    |  21 +-
 doc/database.md                               |   2 +-
 doc/database/db_diaspora-contact.md           |  52 ++
 doc/database/db_fcontact.md                   |  51 --
 src/Console/Relocate.php                      |   6 +-
 src/DI.php                                    |   5 +
 src/Database/DBStructure.php                  |   2 +-
 src/Database/Database.php                     |  18 +-
 src/Database/PostUpdate.php                   |   5 +
 src/Factory/Api/Mastodon/Status.php           |  31 +-
 src/Model/Contact.php                         |  30 +-
 src/Model/FContact.php                        | 161 ------
 src/Module/Api/Mastodon/Accounts/Statuses.php |  17 +-
 src/Module/NoScrape.php                       |   1 -
 src/Module/Photo.php                          |   6 +
 src/Module/Profile/Status.php                 |   2 +-
 src/Network/Probe.php                         |  39 +-
 src/Object/Api/Mastodon/Account.php           |   4 +-
 src/Object/Image.php                          |  52 +-
 src/Protocol/DFRN.php                         |   8 +-
 src/Protocol/Diaspora.php                     | 529 +++++++++---------
 .../Diaspora/Entity/DiasporaContact.php       | 140 +++++
 .../Diaspora/Factory/DiasporaContact.php      | 102 ++++
 .../Diaspora/Repository/DiasporaContact.php   | 283 ++++++++++
 src/Protocol/WebFingerUri.php                 | 113 ++++
 src/Worker/Delivery.php                       |   5 +-
 src/Worker/ExpirePosts.php                    |   2 +-
 src/Worker/UpdateFContact.php                 |  41 --
 static/dbstructure.config.php                 |  70 +--
 static/dbview.config.php                      |  69 ++-
 tests/src/Protocol/WebFingerUriTest.php       | 135 +++++
 update.php                                    |   8 +-
 33 files changed, 1438 insertions(+), 705 deletions(-)
 create mode 100644 doc/database/db_diaspora-contact.md
 delete mode 100644 doc/database/db_fcontact.md
 delete mode 100644 src/Model/FContact.php
 create mode 100644 src/Protocol/Diaspora/Entity/DiasporaContact.php
 create mode 100644 src/Protocol/Diaspora/Factory/DiasporaContact.php
 create mode 100644 src/Protocol/Diaspora/Repository/DiasporaContact.php
 create mode 100644 src/Protocol/WebFingerUri.php
 delete mode 100644 src/Worker/UpdateFContact.php
 create mode 100644 tests/src/Protocol/WebFingerUriTest.php

diff --git a/database.sql b/database.sql
index 7b3156f6f..3169bac03 100644
--- a/database.sql
+++ b/database.sql
@@ -1,6 +1,6 @@
 -- ------------------------------------------
 -- Friendica 2022.12-dev (Giant Rhubarb)
--- DB_UPDATE_VERSION 1497
+-- DB_UPDATE_VERSION 1500
 -- ------------------------------------------
 
 
@@ -578,6 +578,40 @@ CREATE TABLE IF NOT EXISTS `delayed-post` (
 	FOREIGN KEY (`wid`) REFERENCES `workerqueue` (`id`) ON UPDATE RESTRICT ON DELETE CASCADE
 ) DEFAULT COLLATE utf8mb4_general_ci COMMENT='Posts that are about to be distributed at a later time';
 
+--
+-- TABLE diaspora-contact
+--
+CREATE TABLE IF NOT EXISTS `diaspora-contact` (
+	`uri-id` int unsigned NOT NULL COMMENT 'Id of the item-uri table entry that contains the contact URL',
+	`addr` varchar(255) COMMENT '',
+	`alias` varchar(255) COMMENT '',
+	`nick` varchar(255) COMMENT '',
+	`name` varchar(255) COMMENT '',
+	`given-name` varchar(255) COMMENT '',
+	`family-name` varchar(255) COMMENT '',
+	`photo` varchar(255) COMMENT '',
+	`photo-medium` varchar(255) COMMENT '',
+	`photo-small` varchar(255) COMMENT '',
+	`batch` varchar(255) COMMENT '',
+	`notify` varchar(255) COMMENT '',
+	`poll` varchar(255) COMMENT '',
+	`subscribe` varchar(255) COMMENT '',
+	`searchable` boolean COMMENT '',
+	`pubkey` text COMMENT '',
+	`gsid` int unsigned COMMENT 'Global Server ID',
+	`created` datetime NOT NULL DEFAULT '0001-01-01 00:00:00' COMMENT '',
+	`updated` datetime NOT NULL DEFAULT '0001-01-01 00:00:00' COMMENT '',
+	`interacting_count` int unsigned DEFAULT 0 COMMENT 'Number of contacts this contact interactes with',
+	`interacted_count` int unsigned DEFAULT 0 COMMENT 'Number of contacts that interacted with this contact',
+	`post_count` int unsigned DEFAULT 0 COMMENT 'Number of posts and comments',
+	 PRIMARY KEY(`uri-id`),
+	 UNIQUE INDEX `addr` (`addr`),
+	 INDEX `alias` (`alias`),
+	 INDEX `gsid` (`gsid`),
+	FOREIGN KEY (`uri-id`) REFERENCES `item-uri` (`id`) ON UPDATE RESTRICT ON DELETE CASCADE,
+	FOREIGN KEY (`gsid`) REFERENCES `gserver` (`id`) ON UPDATE RESTRICT ON DELETE RESTRICT
+) DEFAULT COLLATE utf8mb4_general_ci COMMENT='Diaspora compatible contacts - used in the Diaspora implementation';
+
 --
 -- TABLE diaspora-interaction
 --
@@ -633,39 +667,6 @@ CREATE TABLE IF NOT EXISTS `event` (
 	FOREIGN KEY (`uri-id`) REFERENCES `item-uri` (`id`) ON UPDATE RESTRICT ON DELETE CASCADE
 ) DEFAULT COLLATE utf8mb4_general_ci COMMENT='Events';
 
---
--- TABLE fcontact
---
-CREATE TABLE IF NOT EXISTS `fcontact` (
-	`id` int unsigned NOT NULL auto_increment COMMENT 'sequential ID',
-	`guid` varbinary(255) NOT NULL DEFAULT '' COMMENT 'unique id',
-	`url` varbinary(383) NOT NULL DEFAULT '' COMMENT '',
-	`uri-id` int unsigned COMMENT 'Id of the item-uri table entry that contains the fcontact url',
-	`name` varchar(255) NOT NULL DEFAULT '' COMMENT '',
-	`photo` varbinary(383) NOT NULL DEFAULT '' COMMENT '',
-	`request` varbinary(383) NOT NULL DEFAULT '' COMMENT '',
-	`nick` varchar(255) NOT NULL DEFAULT '' COMMENT '',
-	`addr` varchar(255) NOT NULL DEFAULT '' COMMENT '',
-	`batch` varbinary(383) NOT NULL DEFAULT '' COMMENT '',
-	`notify` varbinary(383) NOT NULL DEFAULT '' COMMENT '',
-	`poll` varbinary(383) NOT NULL DEFAULT '' COMMENT '',
-	`confirm` varbinary(383) NOT NULL DEFAULT '' COMMENT '',
-	`priority` tinyint unsigned NOT NULL DEFAULT 0 COMMENT '',
-	`network` char(4) NOT NULL DEFAULT '' COMMENT '',
-	`alias` varbinary(383) NOT NULL DEFAULT '' COMMENT '',
-	`pubkey` text COMMENT '',
-	`created` datetime NOT NULL DEFAULT '0001-01-01 00:00:00' COMMENT '',
-	`updated` datetime NOT NULL DEFAULT '0001-01-01 00:00:00' COMMENT '',
-	`interacting_count` int unsigned DEFAULT 0 COMMENT 'Number of contacts this contact interactes with',
-	`interacted_count` int unsigned DEFAULT 0 COMMENT 'Number of contacts that interacted with this contact',
-	`post_count` int unsigned DEFAULT 0 COMMENT 'Number of posts and comments',
-	 PRIMARY KEY(`id`),
-	 INDEX `addr` (`addr`(32)),
-	 UNIQUE INDEX `url` (`url`(190)),
-	 UNIQUE INDEX `uri-id` (`uri-id`),
-	FOREIGN KEY (`uri-id`) REFERENCES `item-uri` (`id`) ON UPDATE RESTRICT ON DELETE CASCADE
-) DEFAULT COLLATE utf8mb4_general_ci COMMENT='Diaspora compatible contacts - used in the Diaspora implementation';
-
 --
 -- TABLE fetch-entry
 --
@@ -2802,11 +2803,11 @@ CREATE VIEW `account-view` AS SELECT
 	`contact`.`blocked` AS `blocked`,
 	`contact`.`notify` AS `dfrn-notify`,
 	`contact`.`poll` AS `dfrn-poll`,
-	`fcontact`.`guid` AS `diaspora-guid`,
-	`fcontact`.`batch` AS `diaspora-batch`,
-	`fcontact`.`notify` AS `diaspora-notify`,
-	`fcontact`.`poll` AS `diaspora-poll`,
-	`fcontact`.`alias` AS `diaspora-alias`,
+	`item-uri`.`guid` AS `diaspora-guid`,
+	`diaspora-contact`.`batch` AS `diaspora-batch`,
+	`diaspora-contact`.`notify` AS `diaspora-notify`,
+	`diaspora-contact`.`poll` AS `diaspora-poll`,
+	`diaspora-contact`.`alias` AS `diaspora-alias`,
 	`apcontact`.`uuid` AS `ap-uuid`,
 	`apcontact`.`type` AS `ap-type`,
 	`apcontact`.`following` AS `ap-following`,
@@ -2824,7 +2825,7 @@ CREATE VIEW `account-view` AS SELECT
 	FROM `contact`
 			LEFT JOIN `item-uri` ON `item-uri`.`id` = `contact`.`uri-id`
 			LEFT JOIN `apcontact` ON `apcontact`.`uri-id` = `contact`.`uri-id`
-			LEFT JOIN `fcontact` ON `fcontact`.`uri-id` = contact.`uri-id`
+			LEFT JOIN `diaspora-contact` ON `diaspora-contact`.`uri-id` = contact.`uri-id`
 			LEFT JOIN `gserver` ON `gserver`.`id` = contact.`gsid`
 			WHERE `contact`.`uid` = 0;
 
@@ -2903,14 +2904,14 @@ CREATE VIEW `account-user-view` AS SELECT
 	`ucontact`.`reason` AS `reason`,
 	`contact`.`notify` AS `dfrn-notify`,
 	`contact`.`poll` AS `dfrn-poll`,
-	`fcontact`.`guid` AS `diaspora-guid`,
-	`fcontact`.`batch` AS `diaspora-batch`,
-	`fcontact`.`notify` AS `diaspora-notify`,
-	`fcontact`.`poll` AS `diaspora-poll`,
-	`fcontact`.`alias` AS `diaspora-alias`,
-	`fcontact`.`interacting_count` AS `diaspora-interacting_count`,
-	`fcontact`.`interacted_count` AS `diaspora-interacted_count`,
-	`fcontact`.`post_count` AS `diaspora-post_count`,
+	`item-uri`.`guid` AS `diaspora-guid`,
+	`diaspora-contact`.`batch` AS `diaspora-batch`,
+	`diaspora-contact`.`notify` AS `diaspora-notify`,
+	`diaspora-contact`.`poll` AS `diaspora-poll`,
+	`diaspora-contact`.`alias` AS `diaspora-alias`,
+	`diaspora-contact`.`interacting_count` AS `diaspora-interacting_count`,
+	`diaspora-contact`.`interacted_count` AS `diaspora-interacted_count`,
+	`diaspora-contact`.`post_count` AS `diaspora-post_count`,
 	`apcontact`.`uuid` AS `ap-uuid`,
 	`apcontact`.`type` AS `ap-type`,
 	`apcontact`.`following` AS `ap-following`,
@@ -2929,7 +2930,7 @@ CREATE VIEW `account-user-view` AS SELECT
 			INNER JOIN `contact` ON `contact`.`uri-id` = `ucontact`.`uri-id` AND `contact`.`uid` = 0
 			LEFT JOIN `item-uri` ON `item-uri`.`id` = `ucontact`.`uri-id`
 			LEFT JOIN `apcontact` ON `apcontact`.`uri-id` = `ucontact`.`uri-id`
-			LEFT JOIN `fcontact` ON `fcontact`.`uri-id` = `ucontact`.`uri-id` AND `fcontact`.`network` = 'dspr'
+			LEFT JOIN `diaspora-contact` ON `diaspora-contact`.`uri-id` = `ucontact`.`uri-id`
 			LEFT JOIN `gserver` ON `gserver`.`id` = contact.`gsid`;
 
 --
@@ -3006,3 +3007,37 @@ CREATE VIEW `profile_field-view` AS SELECT
 	`profile_field`.`edited` AS `edited`
 	FROM `profile_field`
 			INNER JOIN `permissionset` ON `permissionset`.`id` = `profile_field`.`psid`;
+
+--
+-- VIEW diaspora-contact-view
+--
+DROP VIEW IF EXISTS `diaspora-contact-view`;
+CREATE VIEW `diaspora-contact-view` AS SELECT 
+	`diaspora-contact`.`uri-id` AS `uri-id`,
+	`item-uri`.`uri` AS `url`,
+	`item-uri`.`guid` AS `guid`,
+	`diaspora-contact`.`addr` AS `addr`,
+	`diaspora-contact`.`alias` AS `alias`,
+	`diaspora-contact`.`nick` AS `nick`,
+	`diaspora-contact`.`name` AS `name`,
+	`diaspora-contact`.`given-name` AS `given-name`,
+	`diaspora-contact`.`family-name` AS `family-name`,
+	`diaspora-contact`.`photo` AS `photo`,
+	`diaspora-contact`.`photo-medium` AS `photo-medium`,
+	`diaspora-contact`.`photo-small` AS `photo-small`,
+	`diaspora-contact`.`batch` AS `batch`,
+	`diaspora-contact`.`notify` AS `notify`,
+	`diaspora-contact`.`poll` AS `poll`,
+	`diaspora-contact`.`subscribe` AS `subscribe`,
+	`diaspora-contact`.`searchable` AS `searchable`,
+	`diaspora-contact`.`pubkey` AS `pubkey`,
+	`gserver`.`url` AS `baseurl`,
+	`diaspora-contact`.`gsid` AS `gsid`,
+	`diaspora-contact`.`created` AS `created`,
+	`diaspora-contact`.`updated` AS `updated`,
+	`diaspora-contact`.`interacting_count` AS `interacting_count`,
+	`diaspora-contact`.`interacted_count` AS `interacted_count`,
+	`diaspora-contact`.`post_count` AS `post_count`
+	FROM `diaspora-contact`
+			INNER JOIN `item-uri` ON `item-uri`.`id` = `diaspora-contact`.`uri-id`
+			LEFT JOIN `gserver` ON `gserver`.`id` = `diaspora-contact`.`gsid`;
diff --git a/doc/FAQ.md b/doc/FAQ.md
index 0f9e11502..63e04a7c3 100644
--- a/doc/FAQ.md
+++ b/doc/FAQ.md
@@ -179,26 +179,22 @@ The available features are client specific and may differ.
 
 * [AndStatus](http://andstatus.org) ([F-Droid](https://f-droid.org/repository/browse/?fdid=org.andstatus.app), [Google Play](https://play.google.com/store/apps/details?id=org.andstatus.app))
 * [B4X for Pleroma & Mastodon](https://github.com/AnywhereSoftware/B4X-Pleroma)
-* [Fedi](https://play.google.com/store/apps/details?id=com.fediverse.app)
+* [Fedi](https://github.com/Big-Fig/Fediverse.app) ([Google Play](https://play.google.com/store/apps/details?id=com.fediverse.app)
 * [Fedilab](https://fedilab.app) ([F-Droid](https://f-droid.org/app/fr.gouv.etalab.mastodon), [Google Play](https://play.google.com/store/apps/details?id=app.fedilab.android))
 * [Friendiqa](https://git.friendi.ca/lubuwest/Friendiqa) ([F-Droid](https://git.friendi.ca/lubuwest/Friendiqa#install), [Google Play](https://play.google.com/store/apps/details?id=org.qtproject.friendiqa))
 * [Husky](https://git.sr.ht/~captainepoch/husky) ([F-Droid](https://f-droid.org/repository/browse/?fdid=su.xash.husky), [Google Play](https://play.google.com/store/apps/details?id=su.xash.husky))
-* [Mastodon for Android](https://github.com/mastodon/mastodon-android) (F-Droid: Pending, [Google-Play](https://play.google.com/store/apps/details?id=org.joinmastodon.android))
-* [Subway Tooter](https://github.com/tateisu/SubwayTooter)
-* [Tooot](https://tooot.app/)
+* [Mastodon](https://github.com/mastodon/mastodon-android) ([F-Droid](https://f-droid.org/en/packages/org.joinmastodon.android/), [Google Play](https://play.google.com/store/apps/details?id=org.joinmastodon.android))
+* [Subway Tooter](https://github.com/tateisu/SubwayTooter) ([F-Droid](https://android.izzysoft.de/repo/apk/jp.juggler.subwaytooter))
+* [Tooot](https://tooot.app/) ([Google Play](https://play.google.com/store/apps/details?id=com.xmflsct.app.tooot))
 * [Tusky](https://tusky.app) ([F-Droid](https://f-droid.org/repository/browse/?fdid=com.keylesspalace.tusky), [Google Play](https://play.google.com/store/apps/details?id=com.keylesspalace.tusky))
 * [Twidere](https://github.com/TwidereProject/Twidere-Android) ([F-Droid](https://f-droid.org/repository/browse/?fdid=org.mariotaku.twidere), [Google Play](https://play.google.com/store/apps/details?id=com.twidere.twiderex))
 * [TwidereX](https://github.com/TwidereProject/TwidereX-Android) ([F-Droid](https://f-droid.org/en/packages/com.twidere.twiderex/), [Google Play](https://play.google.com/store/apps/details?id=com.twidere.twiderex))
 * [Yuito](https://github.com/accelforce/Yuito) ([Google Play](https://play.google.com/store/apps/details?id=net.accelf.yuito))
 
-#### SailfishOS
-
-* [Friendly](https://openrepos.net/content/fabrixxm/friendly), last update: 2018
-
 #### iOS
 
 * [B4X for Pleroma & Mastodon](https://github.com/AnywhereSoftware/B4X-Pleroma) ([AppStore](https://apps.apple.com/app/b4x-pleroma/id1538396871))
-* [Fedi](https://fediapp.com) ([AppStore](https://apps.apple.com/de/app/fedi-for-pleroma-and-mastodon/id1478806281))
+* [Fedi](https://github.com/Big-Fig/Fediverse.app) ([AppStore](https://apps.apple.com/de/app/fedi-for-pleroma-and-mastodon/id1478806281))
 * [Mastodon for iPhone and iPad](https://joinmastodon.org/apps) ([AppStore](https://apps.apple.com/us/app/mastodon-for-iphone/id1571998974))
 * [Stella*](https://www.stella-app.net/) ([AppStore](https://apps.apple.com/us/app/stella-for-mastodon-twitter/id921372048))
 * [Tooot](https://github.com/tooot-app) ([AppStore](https://apps.apple.com/app/id1549772269), Data collection (not linked to identity)
@@ -207,18 +203,19 @@ The available features are client specific and may differ.
 #### Linux
 
 * [Choqok](https://choqok.kde.org)
-* [Whalebird](https://whalebird.social)
-* [TheDesk](https://ja.mstdn.wiki/TheDesk)
+* [Whalebird](https://whalebird.social/en/desktop/contents) ([GitHub](https://github.com/h3poteto/whalebird-desktop))
+* [TheDesk](https://thedesk.top/en/) ([GitHub](https://github.com/cutls/TheDesk))
 * [Toot](https://toot.readthedocs.io/en/latest/)
 * [Tootle](https://github.com/bleakgrey/tootle)
 
 #### macOS
 
-* [Mastonaut](https://mastonaut.app/) ([AppStore](https://apps.apple.com/us/app/mastonaut/id1450757574)), closed source
+* [TheDesk](https://thedesk.top/en/) ([GitHub](https://github.com/cutls/TheDesk))
 * [Whalebird](https://whalebird.social/en/desktop/contents) ([AppStore](https://apps.apple.com/de/app/whalebird/id1378283354), [GitHub](https://github.com/h3poteto/whalebird-desktop))
 
 #### Windows
 
+* [TheDesk](https://thedesk.top/en/) ([GitHub](https://github.com/cutls/TheDesk))
 * [Whalebird](https://whalebird.social/en/desktop/contents) ([Website Download](https://whalebird.social/en/desktop/contents/downloads#windows), [GitHub](https://github.com/h3poteto/whalebird-desktop))
 
 #### Web Frontend
diff --git a/doc/database.md b/doc/database.md
index ec8d16b2c..9fa438c8d 100644
--- a/doc/database.md
+++ b/doc/database.md
@@ -23,10 +23,10 @@ Database Tables
 | [contact-relation](help/database/db_contact-relation) | Contact relations |
 | [conv](help/database/db_conv) | private messages |
 | [delayed-post](help/database/db_delayed-post) | Posts that are about to be distributed at a later time |
+| [diaspora-contact](help/database/db_diaspora-contact) | Diaspora compatible contacts - used in the Diaspora implementation |
 | [diaspora-interaction](help/database/db_diaspora-interaction) | Signed Diaspora Interaction |
 | [endpoint](help/database/db_endpoint) | ActivityPub endpoints - used in the ActivityPub implementation |
 | [event](help/database/db_event) | Events |
-| [fcontact](help/database/db_fcontact) | Diaspora compatible contacts - used in the Diaspora implementation |
 | [fetch-entry](help/database/db_fetch-entry) |  |
 | [fetched-activity](help/database/db_fetched-activity) | Id of fetched activities |
 | [fsuggest](help/database/db_fsuggest) | friend suggestion stuff |
diff --git a/doc/database/db_diaspora-contact.md b/doc/database/db_diaspora-contact.md
new file mode 100644
index 000000000..4beaeb019
--- /dev/null
+++ b/doc/database/db_diaspora-contact.md
@@ -0,0 +1,52 @@
+Table diaspora-contact
+===========
+
+Diaspora compatible contacts - used in the Diaspora implementation
+
+Fields
+------
+
+| Field             | Description                                                  | Type         | Null | Key | Default             | Extra |
+| ----------------- | ------------------------------------------------------------ | ------------ | ---- | --- | ------------------- | ----- |
+| uri-id            | Id of the item-uri table entry that contains the contact URL | int unsigned | NO   | PRI | NULL                |       |
+| addr              |                                                              | varchar(255) | YES  |     | NULL                |       |
+| alias             |                                                              | varchar(255) | YES  |     | NULL                |       |
+| nick              |                                                              | varchar(255) | YES  |     | NULL                |       |
+| name              |                                                              | varchar(255) | YES  |     | NULL                |       |
+| given-name        |                                                              | varchar(255) | YES  |     | NULL                |       |
+| family-name       |                                                              | varchar(255) | YES  |     | NULL                |       |
+| photo             |                                                              | varchar(255) | YES  |     | NULL                |       |
+| photo-medium      |                                                              | varchar(255) | YES  |     | NULL                |       |
+| photo-small       |                                                              | varchar(255) | YES  |     | NULL                |       |
+| batch             |                                                              | varchar(255) | YES  |     | NULL                |       |
+| notify            |                                                              | varchar(255) | YES  |     | NULL                |       |
+| poll              |                                                              | varchar(255) | YES  |     | NULL                |       |
+| subscribe         |                                                              | varchar(255) | YES  |     | NULL                |       |
+| searchable        |                                                              | boolean      | YES  |     | NULL                |       |
+| pubkey            |                                                              | text         | YES  |     | NULL                |       |
+| gsid              | Global Server ID                                             | int unsigned | YES  |     | NULL                |       |
+| created           |                                                              | datetime     | NO   |     | 0001-01-01 00:00:00 |       |
+| updated           |                                                              | datetime     | NO   |     | 0001-01-01 00:00:00 |       |
+| interacting_count | Number of contacts this contact interactes with              | int unsigned | YES  |     | 0                   |       |
+| interacted_count  | Number of contacts that interacted with this contact         | int unsigned | YES  |     | 0                   |       |
+| post_count        | Number of posts and comments                                 | int unsigned | YES  |     | 0                   |       |
+
+Indexes
+------------
+
+| Name    | Fields       |
+| ------- | ------------ |
+| PRIMARY | uri-id       |
+| addr    | UNIQUE, addr |
+| alias   | alias        |
+| gsid    | gsid         |
+
+Foreign Keys
+------------
+
+| Field | Target Table | Target Field |
+|-------|--------------|--------------|
+| uri-id | [item-uri](help/database/db_item-uri) | id |
+| gsid | [gserver](help/database/db_gserver) | id |
+
+Return to [database documentation](help/database)
diff --git a/doc/database/db_fcontact.md b/doc/database/db_fcontact.md
deleted file mode 100644
index 095c47aaf..000000000
--- a/doc/database/db_fcontact.md
+++ /dev/null
@@ -1,51 +0,0 @@
-Table fcontact
-===========
-
-Diaspora compatible contacts - used in the Diaspora implementation
-
-Fields
-------
-
-| Field             | Description                                                   | Type             | Null | Key | Default             | Extra          |
-| ----------------- | ------------------------------------------------------------- | ---------------- | ---- | --- | ------------------- | -------------- |
-| id                | sequential ID                                                 | int unsigned     | NO   | PRI | NULL                | auto_increment |
-| guid              | unique id                                                     | varbinary(255)   | NO   |     |                     |                |
-| url               |                                                               | varbinary(383)   | NO   |     |                     |                |
-| uri-id            | Id of the item-uri table entry that contains the fcontact url | int unsigned     | YES  |     | NULL                |                |
-| name              |                                                               | varchar(255)     | NO   |     |                     |                |
-| photo             |                                                               | varbinary(383)   | NO   |     |                     |                |
-| request           |                                                               | varbinary(383)   | NO   |     |                     |                |
-| nick              |                                                               | varchar(255)     | NO   |     |                     |                |
-| addr              |                                                               | varchar(255)     | NO   |     |                     |                |
-| batch             |                                                               | varbinary(383)   | NO   |     |                     |                |
-| notify            |                                                               | varbinary(383)   | NO   |     |                     |                |
-| poll              |                                                               | varbinary(383)   | NO   |     |                     |                |
-| confirm           |                                                               | varbinary(383)   | NO   |     |                     |                |
-| priority          |                                                               | tinyint unsigned | NO   |     | 0                   |                |
-| network           |                                                               | char(4)          | NO   |     |                     |                |
-| alias             |                                                               | varbinary(383)   | NO   |     |                     |                |
-| pubkey            |                                                               | text             | YES  |     | NULL                |                |
-| created           |                                                               | datetime         | NO   |     | 0001-01-01 00:00:00 |                |
-| updated           |                                                               | datetime         | NO   |     | 0001-01-01 00:00:00 |                |
-| interacting_count | Number of contacts this contact interactes with               | int unsigned     | YES  |     | 0                   |                |
-| interacted_count  | Number of contacts that interacted with this contact          | int unsigned     | YES  |     | 0                   |                |
-| post_count        | Number of posts and comments                                  | int unsigned     | YES  |     | 0                   |                |
-
-Indexes
-------------
-
-| Name    | Fields           |
-| ------- | ---------------- |
-| PRIMARY | id               |
-| addr    | addr(32)         |
-| url     | UNIQUE, url(190) |
-| uri-id  | UNIQUE, uri-id   |
-
-Foreign Keys
-------------
-
-| Field | Target Table | Target Field |
-|-------|--------------|--------------|
-| uri-id | [item-uri](help/database/db_item-uri) | id |
-
-Return to [database documentation](help/database)
diff --git a/src/Console/Relocate.php b/src/Console/Relocate.php
index 729bee392..a90802d81 100644
--- a/src/Console/Relocate.php
+++ b/src/Console/Relocate.php
@@ -131,9 +131,9 @@ HELP;
 			$this->out('Updating event table fields');
 			$this->database->replaceInTableFields('event', ['uri'], $old_url, $new_url);
 
-			$this->out('Updating fcontact table fields');
-			$this->database->replaceInTableFields('fcontact', ['url', 'photo', 'request', 'batch', 'poll', 'confirm', 'alias'], $old_url, $new_url);
-			$this->database->replaceInTableFields('fcontact', ['addr'], $old_host, $new_host);
+			$this->out('Updating diaspora-contact table fields');
+			$this->database->replaceInTableFields('diaspora-contact', ['alias', 'photo', 'photo-medium', 'photo-small', 'batch', 'notify', 'poll', 'subscribe'], $old_url, $new_url);
+			$this->database->replaceInTableFields('diaspora-contact', ['addr'], $old_host, $new_host);
 
 			$this->out('Updating fsuggest table fields');
 			$this->database->replaceInTableFields('fsuggest', ['url', 'request', 'photo'], $old_url, $new_url);
diff --git a/src/DI.php b/src/DI.php
index 3a8a9b6d2..59f48fcb5 100644
--- a/src/DI.php
+++ b/src/DI.php
@@ -599,6 +599,11 @@ abstract class DI
 		return self::$dice->create(Protocol\Activity::class);
 	}
 
+	public static function dsprContact(): Protocol\Diaspora\Repository\DiasporaContact
+	{
+		return self::$dice->create(Protocol\Diaspora\Repository\DiasporaContact::class);
+	}
+
 	//
 	// "Security" namespace instances
 	//
diff --git a/src/Database/DBStructure.php b/src/Database/DBStructure.php
index 74bd5b423..6e50c9fb2 100644
--- a/src/Database/DBStructure.php
+++ b/src/Database/DBStructure.php
@@ -74,7 +74,7 @@ class DBStructure
 		$old_tables = ['fserver', 'gcign', 'gcontact', 'gcontact-relation', 'gfollower' ,'glink', 'item-delivery-data',
 			'item-activity', 'item-content', 'item_id', 'participation', 'poll', 'poll_result', 'queue', 'retriever_rule',
 			'deliverq', 'dsprphotoq', 'ffinder', 'sign', 'spam', 'term', 'user-item', 'thread', 'item', 'challenge',
-			'auth_codes', 'tokens', 'clients', 'profile_check', 'host', 'conversation'];
+			'auth_codes', 'tokens', 'clients', 'profile_check', 'host', 'conversation', 'fcontact'];
 
 		$tables = DBA::selectToArray('INFORMATION_SCHEMA.TABLES', ['TABLE_NAME'],
 			['TABLE_SCHEMA' => DBA::databaseName(), 'TABLE_TYPE' => 'BASE TABLE']);
diff --git a/src/Database/Database.php b/src/Database/Database.php
index 036e6ec2c..b5d496392 100644
--- a/src/Database/Database.php
+++ b/src/Database/Database.php
@@ -833,7 +833,7 @@ class Database
 	/**
 	 * Check if data exists
 	 *
-	 * @param string $table     Table name in format schema.table (while scheme is optiona)
+	 * @param string $table     Table name in format [schema.]table
 	 * @param array  $condition Array of fields for condition
 	 *
 	 * @return boolean Are there rows for that condition?
@@ -1017,7 +1017,7 @@ class Database
 	/**
 	 * Insert a row into a table. Field value objects will be cast as string.
 	 *
-	 * @param string $table          Table name in format schema.table (while scheme is optiona)
+	 * @param string $table          Table name in format [schema.]table
 	 * @param array  $param          parameter array
 	 * @param int    $duplicate_mode What to do on a duplicated entry
 	 *
@@ -1068,7 +1068,7 @@ class Database
 	 * Inserts a row with the provided data in the provided table.
 	 * If the data corresponds to an existing row through a UNIQUE or PRIMARY index constraints, it updates the row instead.
 	 *
-	 * @param string $table Table name in format schema.table (while scheme is optiona)
+	 * @param string $table Table name in format [schema.]table
 	 * @param array  $param parameter array
 	 * @return boolean was the insert successful?
 	 * @throws \Exception
@@ -1116,7 +1116,7 @@ class Database
 	 *
 	 * This function can be extended in the future to accept a table array as well.
 	 *
-	 * @param string $table Table name in format schema.table (while scheme is optiona)
+	 * @param string $table Table name in format [schema.]table
 	 * @return boolean was the lock successful?
 	 * @throws \Exception
 	 */
@@ -1314,7 +1314,7 @@ class Database
 	 * Only set $old_fields to a boolean value when you are sure that you will update a single row.
 	 * When you set $old_fields to "true" then $fields must contain all relevant fields!
 	 *
-	 * @param string        $table      Table name in format schema.table (while scheme is optiona)
+	 * @param string        $table      Table name in format [schema.]table
 	 * @param array         $fields     contains the fields that are updated
 	 * @param array         $condition  condition array with the key values
 	 * @param array|boolean $old_fields array with the old field values that are about to be replaced (true = update on duplicate, false = don't update identical fields)
@@ -1380,7 +1380,7 @@ class Database
 	/**
 	 * Retrieve a single record from a table and returns it in an associative array
 	 *
-	 * @param string $table     Table name in format schema.table (while scheme is optiona)
+	 * @param string $table     Table name in format [schema.]table
 	 * @param array  $fields    Array of selected fields, empty for all
 	 * @param array  $condition Array of fields for condition
 	 * @param array  $params    Array of several parameters
@@ -1406,7 +1406,7 @@ class Database
 	/**
 	 * Select rows from a table and fills an array with the data
 	 *
-	 * @param string $table     Table name in format schema.table (while scheme is optiona)
+	 * @param string $table     Table name in format [schema.]table
 	 * @param array  $fields    Array of selected fields, empty for all
 	 * @param array  $condition Array of fields for condition
 	 * @param array  $params    Array of several parameters
@@ -1479,7 +1479,7 @@ class Database
 	 *
 	 * $data = DBA::select($table, $fields, $condition, $params);
 	 *
-	 * @param string $table     Table name in format schema.table (while scheme is optiona)
+	 * @param string $table     Table name in format [schema.]table
 	 * @param array  $fields    Array of selected fields, empty for all
 	 * @param array  $condition Array of fields for condition
 	 * @param array  $params    Array of several parameters
@@ -1519,7 +1519,7 @@ class Database
 	/**
 	 * Counts the rows from a table satisfying the provided condition
 	 *
-	 * @param string $table     Table name in format schema.table (while scheme is optiona)
+	 * @param string $table     Table name in format [schema.]table
 	 * @param array  $condition Array of fields for condition
 	 * @param array  $params    Array of several parameters
 	 *
diff --git a/src/Database/PostUpdate.php b/src/Database/PostUpdate.php
index adc88b13e..e57d92ceb 100644
--- a/src/Database/PostUpdate.php
+++ b/src/Database/PostUpdate.php
@@ -899,6 +899,11 @@ class PostUpdate
 			return true;
 		}
 
+		if (!DBStructure::existsTable('fcontact')) {
+			DI::config()->set('system', 'post_update_version', 1425);
+			return true;
+		}
+
 		$condition = ["`uri-id` IS NULL"];
 		Logger::info('Start', ['rest' => DBA::count('fcontact', $condition)]);
 
diff --git a/src/Factory/Api/Mastodon/Status.php b/src/Factory/Api/Mastodon/Status.php
index dba74b140..94b42ce79 100644
--- a/src/Factory/Api/Mastodon/Status.php
+++ b/src/Factory/Api/Mastodon/Status.php
@@ -86,7 +86,7 @@ class Status extends BaseFactory
 	 */
 	public function createFromUriId(int $uriId, int $uid = 0, bool $reblog = true): \Friendica\Object\Api\Mastodon\Status
 	{
-		$fields = ['uri-id', 'uid', 'author-id', 'author-uri-id', 'author-link', 'causer-uri-id', 'post-reason', 'starred', 'app', 'title', 'body', 'raw-body', 'content-warning', 'question-id',
+		$fields = ['uri-id', 'uid', 'author-id', 'causer-id', 'author-uri-id', 'author-link', 'causer-uri-id', 'post-reason', 'starred', 'app', 'title', 'body', 'raw-body', 'content-warning', 'question-id',
 			'created', 'network', 'thr-parent-id', 'parent-author-id', 'language', 'uri', 'plink', 'private', 'vid', 'gravity', 'featured', 'has-media', 'quote-uri-id'];
 		$item = Post::selectFirst($fields, ['uri-id' => $uriId, 'uid' => [0, $uid]], ['order' => ['uid' => true]]);
 		if (!$item) {
@@ -97,9 +97,18 @@ class Status extends BaseFactory
 			throw new HTTPException\NotFoundException('Item with URI ID ' . $uriId . ' not found' . ($uid ? ' for user ' . $uid : '.'));
 		}
 
-		$is_reshare = $reblog && !is_null($item['causer-uri-id']) && ($item['post-reason'] == Item::PR_ANNOUNCEMENT);
-
-		$account = $this->mstdnAccountFactory->createFromUriId($is_reshare ? $item['causer-uri-id']:$item['author-uri-id'], $uid);
+		if (($item['gravity'] == Item::GRAVITY_ACTIVITY) && ($item['vid'] == Verb::getID(Activity::ANNOUNCE))) {
+			$is_reshare = true;
+			$account    = $this->mstdnAccountFactory->createFromUriId($item['author-uri-id'], $uid);
+			$uriId      = $item['thr-parent-id'];
+			$item       = Post::selectFirst($fields, ['uri-id' => $uriId, 'uid' => [0, $uid]], ['order' => ['uid' => true]]);
+			if (!$item) {
+				throw new HTTPException\NotFoundException('Item with URI ID ' . $uriId . ' not found' . ($uid ? ' for user ' . $uid : '.'));
+			}
+		} else {
+			$is_reshare = $reblog && !is_null($item['causer-uri-id']) && ($item['causer-id'] != $item['author-id']) && ($item['post-reason'] == Item::PR_ANNOUNCEMENT);
+			$account    = $this->mstdnAccountFactory->createFromUriId($is_reshare ? $item['causer-uri-id'] : $item['author-uri-id'], $uid);
+		}
 
 		$count_announce = Post::countPosts([
 			'thr-parent-id' => $uriId,
@@ -190,19 +199,13 @@ class Status extends BaseFactory
 			}
 		}
 
-		if ($item['vid'] == Verb::getID(Activity::ANNOUNCE)) {
-			$reshare       = $this->createFromUriId($item['thr-parent-id'], $uid)->toArray();
-			$reshared_item = Post::selectFirst(['title', 'body'], ['uri-id' => $item['thr-parent-id'],'uid' => [0, $uid]]);
-			$item['title'] = $reshared_item['title'] ?? $item['title'];
-			$item['body']  = $reshared_item['body'] ?? $item['body'];
-		} else {
-			$item['body']     = $this->contentItem->addSharedPost($item);
-			$item['raw-body'] = $this->contentItem->addSharedPost($item, $item['raw-body']);
-			$reshare = [];
-		}
+		$item['body']     = $this->contentItem->addSharedPost($item);
+		$item['raw-body'] = $this->contentItem->addSharedPost($item, $item['raw-body']);
 
 		if ($is_reshare) {
 			$reshare = $this->createFromUriId($uriId, $uid, false)->toArray();
+		} else {
+			$reshare = [];
 		}
 
 		return new \Friendica\Object\Api\Mastodon\Status($item, $account, $counts, $userAttributes, $sensitive, $application, $mentions, $tags, $card, $attachments, $reshare, $poll);
diff --git a/src/Model/Contact.php b/src/Model/Contact.php
index 34ce8e684..e80f0752e 100644
--- a/src/Model/Contact.php
+++ b/src/Model/Contact.php
@@ -1395,7 +1395,7 @@ class Contact
 		}
 
 		if ($data['network'] == Protocol::DIASPORA) {
-			FContact::updateFromProbeArray($data);
+			DI::dsprContact()->updateFromProbeArray($data);
 		}
 
 		self::updateFromProbeArray($contact_id, $data);
@@ -2057,9 +2057,10 @@ class Contact
 	 * @param integer $cid     contact id
 	 * @param string  $size    One of the Proxy::SIZE_* constants
 	 * @param string  $updated Contact update date
+	 * @param bool    $static  If "true" a parameter is added to convert the avatar to a static one
 	 * @return string avatar link
 	 */
-	public static function getAvatarUrlForId(int $cid, string $size = '', string $updated = '', string $guid = ''): string
+	public static function getAvatarUrlForId(int $cid, string $size = '', string $updated = '', string $guid = '', bool $static = false): string
 	{
 		// We have to fetch the "updated" variable when it wasn't provided
 		// The parameter can be provided to improve performance
@@ -2089,7 +2090,15 @@ class Contact
 				$url .= Proxy::PIXEL_LARGE . '/';
 				break;
 		}
-		return $url . ($guid ?: $cid) . ($updated ? '?ts=' . strtotime($updated) : '');
+		$query_params = [];
+		if ($updated) {
+			$query_params['ts'] = strtotime($updated);
+		}
+		if ($static) {
+			$query_params['static'] = true;
+		}
+		
+		return $url . ($guid ?: $cid) . (!empty($query_params) ? '?' . http_build_query($query_params) : '');
 	}
 
 	/**
@@ -2114,9 +2123,10 @@ class Contact
 	 * @param integer $cid     contact id
 	 * @param string  $size    One of the Proxy::SIZE_* constants
 	 * @param string  $updated Contact update date
+	 * @param bool    $static  If "true" a parameter is added to convert the header to a static one
 	 * @return string header link
 	 */
-	public static function getHeaderUrlForId(int $cid, string $size = '', string $updated = '', string $guid = ''): string
+	public static function getHeaderUrlForId(int $cid, string $size = '', string $updated = '', string $guid = '', bool $static = false): string
 	{
 		// We have to fetch the "updated" variable when it wasn't provided
 		// The parameter can be provided to improve performance
@@ -2147,7 +2157,15 @@ class Contact
 				break;
 		}
 
-		return $url . ($guid ?: $cid) . ($updated ? '?ts=' . strtotime($updated) : '');
+		$query_params = [];
+		if ($updated) {
+			$query_params['ts'] = strtotime($updated);
+		}
+		if ($static) {
+			$query_params['static'] = true;
+		}
+
+		return $url . ($guid ?: $cid) . (!empty($query_params) ? '?' . http_build_query($query_params) : '');
 	}
 
 	/**
@@ -2468,7 +2486,7 @@ class Contact
 		$ret = Probe::uri($contact['url'], $network, $contact['uid']);
 
 		if ($ret['network'] == Protocol::DIASPORA) {
-			FContact::updateFromProbeArray($ret);
+			DI::dsprContact()->updateFromProbeArray($ret);
 		}
 
 		return self::updateFromProbeArray($id, $ret);
diff --git a/src/Model/FContact.php b/src/Model/FContact.php
deleted file mode 100644
index e13dcd46c..000000000
--- a/src/Model/FContact.php
+++ /dev/null
@@ -1,161 +0,0 @@
-<?php
-/**
- * @copyright Copyright (C) 2010-2022, the Friendica project
- *
- * @license GNU AGPL version 3 or any later version
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU Affero General Public License as
- * published by the Free Software Foundation, either version 3 of the
- * License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU Affero General Public License for more details.
- *
- * You should have received a copy of the GNU Affero General Public License
- * along with this program.  If not, see <https://www.gnu.org/licenses/>.
- *
- */
-
-namespace Friendica\Model;
-
-use Friendica\Core\Logger;
-use Friendica\Core\Protocol;
-use Friendica\Core\Worker;
-use Friendica\Database\DBA;
-use Friendica\DI;
-use Friendica\Model\Item;
-use Friendica\Network\Probe;
-use Friendica\Util\DateTimeFormat;
-use Friendica\Util\Strings;
-
-class FContact
-{
-	/**
-	 * Fetches data for a given handle
-	 *
-	 * @param string $handle The handle
-	 * @param boolean $update true = always update, false = never update, null = update when not found or outdated
-	 *
-	 * @return array the queried data
-	 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
-	 * @throws \ImagickException
-	 */
-	public static function getByURL(string $handle, $update = null): array
-	{
-		Logger::debug('Fetch fcontact', ['handle' => $handle, 'update' => $update]);
-		$person = DBA::selectFirst('fcontact', [], ['network' => Protocol::DIASPORA, 'addr' => $handle]);
-		if (!DBA::isResult($person)) {
-			$urls = [$handle, str_replace('http://', 'https://', $handle), Strings::normaliseLink($handle)];
-			$person = DBA::selectFirst('fcontact', [], ['network' => Protocol::DIASPORA, 'url' => $urls]);
-		}
-
-		if (DBA::isResult($person)) {
-			Logger::debug('In cache', ['handle' => $handle]);
-
-			if (is_null($update)) {
-				$update = empty($person['guid']) || empty($person['uri-id']) || ($person['created'] <= DBA::NULL_DATETIME);
-				if (GServer::getNextUpdateDate(true, $person['created'], $person['updated'], false) < DateTimeFormat::utcNow()) {
-					Logger::debug('Start background update', ['handle' => $handle]);
-					Worker::add(['priority' => Worker::PRIORITY_LOW, 'dont_fork' => true], 'UpdateFContact', $handle);
-				}
-			}
-		} elseif (is_null($update)) {
-			$update = true;
-		} else {
-			$person = [];
-		}
-
-		if ($update) {
-			Logger::info('create or refresh', ['handle' => $handle]);
-			$data = Probe::uri($handle, Protocol::DIASPORA);
-
-			// Note that Friendica contacts will return a "Diaspora person"
-			// if Diaspora connectivity is enabled on their server
-			if ($data['network'] ?? '' === Protocol::DIASPORA) {
-				self::updateFromProbeArray($data);
-
-				$person = self::getByURL($handle, false);
-			}
-		}
-
-		return $person;
-	}
-
-	/**
-	 * Updates the fcontact table
-	 *
-	 * @param array $arr The fcontact data
-	 * @throws \Exception
-	 */
-	public static function updateFromProbeArray(array $arr)
-	{
-		$uriid = ItemURI::insert(['uri' => $arr['url'], 'guid' => $arr['guid']]);
-
-		$fcontact  = DBA::selectFirst('fcontact', ['created'], ['url' => $arr['url'], 'network' => $arr['network']]);
-		$contact   = Contact::getByUriId($uriid, ['id', 'created']);
-		$apcontact = APContact::getByURL($arr['url'], false);
-		if (!empty($apcontact)) {
-			$interacted  = $apcontact['following_count'];
-			$interacting = $apcontact['followers_count'];
-			$posts       = $apcontact['statuses_count'];
-		} elseif (!empty($contact['id'])) {
-			$last_interaction = DateTimeFormat::utc('now - 180 days');
-
-			$interacted  = DBA::count('contact-relation', ["`cid` = ? AND NOT `follows` AND `last-interaction` > ?", $contact['id'], $last_interaction]);
-			$interacting = DBA::count('contact-relation', ["`relation-cid` = ? AND NOT `follows` AND `last-interaction` > ?", $contact['id'], $last_interaction]);
-			$posts       = DBA::count('post', ['author-id' => $contact['id'], 'gravity' => [Item::GRAVITY_PARENT, Item::GRAVITY_COMMENT]]);
-		}
-
-		$fields = [
-			'name'              => $arr['name'],
-			'photo'             => $arr['photo'],
-			'request'           => $arr['request'],
-			'nick'              => $arr['nick'],
-			'addr'              => strtolower($arr['addr']),
-			'guid'              => $arr['guid'],
-			'batch'             => $arr['batch'],
-			'notify'            => $arr['notify'],
-			'poll'              => $arr['poll'],
-			'confirm'           => $arr['confirm'],
-			'alias'             => $arr['alias'],
-			'pubkey'            => $arr['pubkey'],
-			'uri-id'            => $uriid,
-			'interacting_count' => $interacting ?? 0,
-			'interacted_count'  => $interacted ?? 0,
-			'post_count'        => $posts ?? 0,
-			'updated'           => DateTimeFormat::utcNow(),
-		];
-
-		if (empty($fcontact['created'])) {
-			$fields['created'] = $fields['updated'];
-		} elseif (!empty($contact['created']) && ($fcontact['created'] <= DBA::NULL_DATETIME)) {
-			$fields['created'] = $contact['created'];
-		}
-
-		$fields = DI::dbaDefinition()->truncateFieldsForTable('fcontact', $fields);
-		DBA::update('fcontact', $fields, ['url' => $arr['url'], 'network' => $arr['network']], true);
-	}
-
-	/**
-	 * get a url (scheme://domain.tld/u/user) from a given Diaspora*
-	 * fcontact guid
-	 *
-	 * @param string $fcontact_guid Hexadecimal string guid
-	 * @return string|null the contact url or null
-	 * @throws \Exception
-	 */
-	public static function getUrlByGuid(string $fcontact_guid)
-	{
-		Logger::info('fcontact', ['guid' => $fcontact_guid]);
-
-		$fcontact = DBA::selectFirst('fcontact', ['url'], ["`url` != ? AND `network` = ? AND `guid` = ?", '', Protocol::DIASPORA, $fcontact_guid]);
-		if (DBA::isResult($fcontact)) {
-			return $fcontact['url'];
-		}
-
-		return null;
-	}
-}
diff --git a/src/Module/Api/Mastodon/Accounts/Statuses.php b/src/Module/Api/Mastodon/Accounts/Statuses.php
index 7de869940..b9bb63ae7 100644
--- a/src/Module/Api/Mastodon/Accounts/Statuses.php
+++ b/src/Module/Api/Mastodon/Accounts/Statuses.php
@@ -80,8 +80,15 @@ class Statuses extends BaseApi
 		}
 
 		if (!$request['pinned'] && !$request['only_media']) {
-			$condition = DBA::mergeConditions($condition, ["(`gravity` IN (?, ?) OR (`gravity` = ? AND `vid` = ?))",
-				Item::GRAVITY_PARENT, Item::GRAVITY_COMMENT, Item::GRAVITY_ACTIVITY, Verb::getID(Activity::ANNOUNCE)]);
+			if ($request['exclude_replies']) {
+				$condition = DBA::mergeConditions($condition, ["(`gravity` = ? OR (`gravity` = ? AND `vid` = ?))",
+					Item::GRAVITY_PARENT, Item::GRAVITY_ACTIVITY, Verb::getID(Activity::ANNOUNCE)]);
+			} else {
+				$condition = DBA::mergeConditions($condition, ["(`gravity` IN (?, ?) OR (`gravity` = ? AND `vid` = ?))",
+					Item::GRAVITY_PARENT, Item::GRAVITY_COMMENT, Item::GRAVITY_ACTIVITY, Verb::getID(Activity::ANNOUNCE)]);
+			}
+		} elseif ($request['exclude_replies']) {
+			$condition = DBA::mergeConditions($condition, ['gravity' => Item::GRAVITY_PARENT]);
 		}
 
 		if (!empty($request['max_id'])) {
@@ -97,16 +104,10 @@ class Statuses extends BaseApi
 			$params['order'] = ['uri-id'];
 		}
 
-		if (($request['pinned'] || $request['only_media']) && $request['exclude_replies']) {
-			$condition = DBA::mergeConditions($condition, ['gravity' => Item::GRAVITY_PARENT]);
-		}
-
 		if ($request['pinned']) {
 			$items = DBA::select('collection-view', ['uri-id'], $condition, $params);
 		} elseif ($request['only_media']) {
 			$items = DBA::select('media-view', ['uri-id'], $condition, $params);
-		} elseif ($request['exclude_replies']) {
-			$items = Post::selectThreadForUser($uid, ['uri-id'], $condition, $params);
 		} else {
 			$items = Post::selectForUser($uid, ['uri-id'], $condition, $params);
 		}
diff --git a/src/Module/NoScrape.php b/src/Module/NoScrape.php
index 718c95c10..8e5850ac0 100644
--- a/src/Module/NoScrape.php
+++ b/src/Module/NoScrape.php
@@ -23,7 +23,6 @@ namespace Friendica\Module;
 
 use Friendica\BaseModule;
 use Friendica\Core\System;
-use Friendica\Database\DBA;
 use Friendica\DI;
 use Friendica\Model\APContact;
 use Friendica\Model\User;
diff --git a/src/Module/Photo.php b/src/Module/Photo.php
index a4ef6ab41..78e403e6c 100644
--- a/src/Module/Photo.php
+++ b/src/Module/Photo.php
@@ -182,6 +182,12 @@ class Photo extends BaseModule
 			throw new HTTPException\InternalServerErrorException($error);
 		}
 
+		if (!empty($request['static'])) {
+			$img = new Image($imgdata, $photo['type']);
+			$img->toStatic();
+			$imgdata = $img->asString();
+		}
+
 		// if customsize is set and image is not a gif, resize it
 		if ($photo['type'] !== 'image/gif' && $customsize > 0 && $customsize <= Proxy::PIXEL_THUMB && $square_resize) {
 			$img = new Image($imgdata, $photo['type']);
diff --git a/src/Module/Profile/Status.php b/src/Module/Profile/Status.php
index 0a4a17e46..2ffe91feb 100644
--- a/src/Module/Profile/Status.php
+++ b/src/Module/Profile/Status.php
@@ -173,7 +173,7 @@ class Status extends BaseProfile
 
 		$condition = DBA::mergeConditions($condition, ["((`gravity` = ? AND `wall`) OR
 			(`gravity` = ? AND `vid` = ? AND `origin`
-			AND `thr-parent-id` IN (SELECT `uri-id` FROM `post` WHERE `gravity` = ? AND `network` IN (?, ?))))",
+			AND EXISTS(SELECT `uri-id` FROM `post` WHERE `uri-id` = `post-user-view`.`thr-parent-id` AND `gravity` = ? AND `network` IN (?, ?))))",
 			Item::GRAVITY_PARENT, Item::GRAVITY_ACTIVITY, Verb::getID(Activity::ANNOUNCE), Item::GRAVITY_PARENT, Protocol::ACTIVITYPUB, Protocol::DFRN]);
 
 		$condition = DBA::mergeConditions($condition, ['uid' => $profile['uid'], 'network' => Protocol::FEDERATED,
diff --git a/src/Network/Probe.php b/src/Network/Probe.php
index 5c188f252..d79cd4055 100644
--- a/src/Network/Probe.php
+++ b/src/Network/Probe.php
@@ -110,7 +110,8 @@ class Probe
 	 */
 	private static function rearrangeData(array $data): array
 	{
-		$fields = ['name', 'nick', 'guid', 'url', 'addr', 'alias', 'photo', 'header',
+		$fields = ['name', 'given_name', 'family_name', 'nick', 'guid', 'url', 'addr', 'alias',
+		        'photo', 'photo_medium', 'photo_small', 'header',
 				'account-type', 'community', 'keywords', 'location', 'about', 'xmpp', 'matrix',
 				'hide', 'batch', 'notify', 'poll', 'request', 'confirm', 'subscribe', 'poco',
 				'following', 'followers', 'inbox', 'outbox', 'sharedinbox',
@@ -124,7 +125,7 @@ class Probe
 				if (in_array($field, $numeric_fields)) {
 					$newdata[$field] = (int)$data[$field];
 				} else {
-					$newdata[$field] = $data[$field];
+					$newdata[$field] = trim($data[$field]);
 				}
 			} elseif (!in_array($field, $numeric_fields)) {
 				$newdata[$field] = '';
@@ -1290,9 +1291,19 @@ class Probe
 				$data['name'] = $search->item(0)->nodeValue;
 			}
 
+			$search = $xpath->query("//*[contains(concat(' ', @class, ' '), ' given_name ')]", $vcard); // */
+			if ($search->length > 0) {
+				$data["given_name"] = $search->item(0)->nodeValue;
+			}
+
+			$search = $xpath->query("//*[contains(concat(' ', @class, ' '), ' family_name ')]", $vcard); // */
+			if ($search->length > 0) {
+				$data["family_name"] = $search->item(0)->nodeValue;
+			}
+
 			$search = $xpath->query("//*[contains(concat(' ', @class, ' '), ' searchable ')]", $vcard); // */
 			if ($search->length > 0) {
-				$data['searchable'] = $search->item(0)->nodeValue;
+				$data['hide'] = (strtolower($search->item(0)->nodeValue) != 'true');
 			}
 
 			$search = $xpath->query("//*[contains(concat(' ', @class, ' '), ' key ')]", $vcard); // */
@@ -1309,7 +1320,7 @@ class Probe
 			}
 		}
 
-		$avatar = [];
+		$avatars = [];
 		if (!empty($vcard)) {
 			$photos = $xpath->query("//*[contains(concat(' ', @class, ' '), ' photo ') or contains(concat(' ', @class, ' '), ' avatar ')]", $vcard); // */
 			foreach ($photos as $photo) {
@@ -1319,20 +1330,27 @@ class Probe
 				}
 
 				if (isset($attr['src']) && isset($attr['width'])) {
-					$avatar[$attr['width']] = $attr['src'];
+					$avatars[$attr['width']] = self::fixAvatar($attr['src'], $data['baseurl']);
 				}
 
 				// We don't have a width. So we just take everything that we got.
 				// This is a Hubzilla workaround which doesn't send a width.
-				if ((sizeof($avatar) == 0) && !empty($attr['src'])) {
-					$avatar[] = $attr['src'];
+				if (!$avatars && !empty($attr['src'])) {
+					$avatars[] = self::fixAvatar($attr['src'], $data['baseurl']);
 				}
 			}
 		}
 
-		if (sizeof($avatar)) {
-			ksort($avatar);
-			$data['photo'] = self::fixAvatar(array_pop($avatar), $data['baseurl']);
+		if ($avatars) {
+			ksort($avatars);
+			$data['photo'] = array_pop($avatars);
+			if ($avatars) {
+				$data['photo_medium'] = array_pop($avatars);
+			}
+
+			if ($avatars) {
+				$data['photo_small'] = array_pop($avatars);
+			}
 		}
 
 		if ($dfrn) {
@@ -1356,7 +1374,6 @@ class Probe
 			}
 		}
 
-
 		return $data;
 	}
 
diff --git a/src/Object/Api/Mastodon/Account.php b/src/Object/Api/Mastodon/Account.php
index 3369a18c0..afc739e1c 100644
--- a/src/Object/Api/Mastodon/Account.php
+++ b/src/Object/Api/Mastodon/Account.php
@@ -109,9 +109,9 @@ class Account extends BaseDataTransferObject
 		$this->note            = BBCode::convertForUriId($account['uri-id'], $account['about'], BBCode::EXTERNAL);
 		$this->url             = $account['url'];
 		$this->avatar          = Contact::getAvatarUrlForId($account['id'] ?? 0 ?: $account['pid'], Proxy::SIZE_SMALL, $account['updated'], $account['guid'] ?? '');
-		$this->avatar_static   = $this->avatar;
+		$this->avatar_static   = Contact::getAvatarUrlForId($account['id'] ?? 0 ?: $account['pid'], Proxy::SIZE_SMALL, $account['updated'], $account['guid'] ?? '', true);
 		$this->header          = Contact::getHeaderUrlForId($account['id'] ?? 0 ?: $account['pid'], '', $account['updated'], $account['guid'] ?? '');
-		$this->header_static   = $this->header;
+		$this->header_static   = Contact::getHeaderUrlForId($account['id'] ?? 0 ?: $account['pid'], '', $account['updated'], $account['guid'] ?? '', true);
 		$this->followers_count = $account['ap-followers_count'] ?? $account['diaspora-interacted_count'] ?? 0;
 		$this->following_count = $account['ap-following_count'] ?? $account['diaspora-interacting_count'] ?? 0;
 		$this->statuses_count  = $account['ap-statuses_count'] ?? $account['diaspora-post_count'] ?? 0;
diff --git a/src/Object/Image.php b/src/Object/Image.php
index 87401304d..6eb862003 100644
--- a/src/Object/Image.php
+++ b/src/Object/Image.php
@@ -25,6 +25,7 @@ use Exception;
 use Friendica\DI;
 use Friendica\Util\Images;
 use Imagick;
+use ImagickDraw;
 use ImagickPixel;
 use GDImage;
 use kornrunner\Blurhash\Blurhash;
@@ -64,7 +65,7 @@ class Image
 		}
 		$this->type = $type;
 
-		if ($this->isImagick() && $this->loadData($data)) {
+		if ($this->isImagick() && (empty($data) || $this->loadData($data))) {
 			return;
 		} else {
 			// Failed to load with Imagick, fallback
@@ -732,11 +733,6 @@ class Image
 	 */
 	public function getBlurHash(): string
 	{
-		if ($this->isImagick()) {
-			// Imagick is not supported
-			return '';
-		}
-
 		$width = $this->getWidth();
 		$height = $this->getHeight();
 
@@ -750,10 +746,14 @@ class Image
 		for ($y = 0; $y < $height; ++$y) {
 			$row = [];
 			for ($x = 0; $x < $width; ++$x) {
-				$index = imagecolorat($this->image, $x, $y);
-				$colors = imagecolorsforindex($this->image, $index);
-
-				$row[] = [$colors['red'], $colors['green'], $colors['blue']];
+				if ($this->isImagick()) {
+					$colors = $this->image->getImagePixelColor($x, $y)->getColor();
+					$row[] = [$colors['r'], $colors['g'], $colors['b']];
+				} else {
+					$index = imagecolorat($this->image, $x, $y);
+					$colors = @imagecolorsforindex($this->image, $index);
+					$row[] = [$colors['red'], $colors['green'], $colors['blue']];
+				}
 			}
 			$pixels[] = $row;
 		}
@@ -775,25 +775,37 @@ class Image
 	 */
 	public function getFromBlurHash(string $blurhash, int $width, int $height)
 	{
-		if ($this->isImagick()) {
-			// Imagick is not supported
-			return;
-		}
-
 		$scaled = Images::getScalingDimensions($width, $height, 90);
 		$pixels = Blurhash::decode($blurhash, $scaled['width'], $scaled['height']);
 
-		$this->image = imagecreatetruecolor($scaled['width'], $scaled['height']);
+		if ($this->isImagick()) {
+			$this->image = new Imagick();
+			$draw  = new ImagickDraw();
+			$this->image->newImage($scaled['width'], $scaled['height'], '', 'png');
+		} else {
+			$this->image = imagecreatetruecolor($scaled['width'], $scaled['height']);
+		}
+
 		for ($y = 0; $y < $scaled['height']; ++$y) {
 			for ($x = 0; $x < $scaled['width']; ++$x) {
 				[$r, $g, $b] = $pixels[$y][$x];
-				imagesetpixel($this->image, $x, $y, imagecolorallocate($this->image, $r, $g, $b));
+				if ($this->isImagick()) {
+					$draw->setFillColor("rgb($r, $g, $b)");
+					$draw->point($x, $y);
+				} else {
+					imagesetpixel($this->image, $x, $y, imagecolorallocate($this->image, $r, $g, $b));
+				}
 			}
 		}
 
-		$this->width  = imagesx($this->image);
-		$this->height = imagesy($this->image);
-		$this->valid  = true;
+		if ($this->isImagick()) {
+			$this->image->drawImage($draw);
+		} else {
+			$this->width  = imagesx($this->image);
+			$this->height = imagesy($this->image);
+		}
+
+		$this->valid = true;
 
 		$this->scaleUp(min($width, $height));
 	}
diff --git a/src/Protocol/DFRN.php b/src/Protocol/DFRN.php
index a86cf2094..92f3e8154 100644
--- a/src/Protocol/DFRN.php
+++ b/src/Protocol/DFRN.php
@@ -34,7 +34,6 @@ use Friendica\DI;
 use Friendica\Model\Contact;
 use Friendica\Model\Conversation;
 use Friendica\Model\Event;
-use Friendica\Model\FContact;
 use Friendica\Model\GServer;
 use Friendica\Model\Item;
 use Friendica\Model\ItemURI;
@@ -45,6 +44,7 @@ use Friendica\Model\Post;
 use Friendica\Model\Profile;
 use Friendica\Model\Tag;
 use Friendica\Model\User;
+use Friendica\Network\HTTPException;
 use Friendica\Network\Probe;
 use Friendica\Util\Crypto;
 use Friendica\Util\DateTimeFormat;
@@ -981,12 +981,12 @@ class DFRN
 				}
 			}
 
-			$fcontact = FContact::getByURL($contact['addr']);
-			if (empty($fcontact)) {
+			try {
+				$pubkey = DI::dsprContact()->getByAddr(WebFingerUri::fromString($contact['addr']))->pubKey;
+			} catch (HTTPException\NotFoundException|\InvalidArgumentException $e) {
 				Logger::notice('Unable to find contact details for ' . $contact['id'] . ' - ' . $contact['addr']);
 				return -22;
 			}
-			$pubkey = $fcontact['pubkey'] ?? '';
 		} else {
 			$pubkey = '';
 		}
diff --git a/src/Protocol/Diaspora.php b/src/Protocol/Diaspora.php
index 54f09e9d9..bb955dca1 100644
--- a/src/Protocol/Diaspora.php
+++ b/src/Protocol/Diaspora.php
@@ -33,7 +33,6 @@ use Friendica\Database\DBA;
 use Friendica\DI;
 use Friendica\Model\Contact;
 use Friendica\Model\Conversation;
-use Friendica\Model\FContact;
 use Friendica\Model\GServer;
 use Friendica\Model\Item;
 use Friendica\Model\ItemURI;
@@ -42,6 +41,7 @@ use Friendica\Model\Post;
 use Friendica\Model\Tag;
 use Friendica\Model\User;
 use Friendica\Network\HTTPClient\Client\HttpClientAccept;
+use Friendica\Network\HTTPException;
 use Friendica\Network\Probe;
 use Friendica\Util\Crypto;
 use Friendica\Util\DateTimeFormat;
@@ -161,8 +161,12 @@ class Diaspora
 			return false;
 		}
 
-		$key = self::key($handle);
-		if ($key == '') {
+		try {
+			$key = self::key(WebFingerUri::fromString($handle));
+			if ($key == '') {
+				throw new \InvalidArgumentException();
+			}
+		} catch (\InvalidArgumentException $e) {
 			Logger::notice("Couldn't get a key for handle " . $handle . ". Discarding.");
 			return false;
 		}
@@ -300,8 +304,13 @@ class Diaspora
 			}
 		}
 
-		$key = self::key($author_addr);
-		if ($key == '') {
+		try {
+			$author = WebFingerUri::fromString($author_addr);
+			$key = self::key($author);
+			if ($key == '') {
+				throw new \InvalidArgumentException();
+			}
+		} catch (\InvalidArgumentException $e) {
 			Logger::notice("Couldn't get a key for handle " . $author_addr . ". Discarding.");
 			if ($no_exit) {
 				return false;
@@ -322,8 +331,8 @@ class Diaspora
 
 		return [
 			'message' => (string)Strings::base64UrlDecode($base->data),
-			'author' => XML::unescape($author_addr),
-			'key' => (string)$key
+			'author'  => $author->getAddr(),
+			'key'     => (string)$key
 		];
 	}
 
@@ -356,7 +365,7 @@ class Diaspora
 
 		if ($children->header) {
 			$public = true;
-			$author_link = str_replace('acct:', '', $children->header->author_id);
+			$idom = $children->header;
 		} else {
 			// This happens with posts from a relais
 			if (empty($privKey)) {
@@ -384,8 +393,13 @@ class Diaspora
 
 			$inner_iv = base64_decode($idom->iv);
 			$inner_aes_key = base64_decode($idom->aes_key);
+		}
 
-			$author_link = str_replace('acct:', '', $idom->author_id);
+		try {
+			$author = WebFingerUri::fromString($idom->author_id);
+		} catch (\Throwable $e) {
+			Logger::notice('Could not retrieve author URI.', ['idom' => $idom]);
+			throw new \Friendica\Network\HTTPException\BadRequestException();
 		}
 
 		$dom = $basedom->children(ActivityNamespace::SALMON_ME);
@@ -439,17 +453,11 @@ class Diaspora
 			$inner_decrypted = self::aesDecrypt($inner_aes_key, $inner_iv, $inner_encrypted);
 		}
 
-		if (!$author_link) {
-			Logger::notice('Could not retrieve author URI.');
-			throw new \Friendica\Network\HTTPException\BadRequestException();
-		}
 		// Once we have the author URI, go to the web and try to find their public key
-		// (first this will look it up locally if it is in the fcontact cache)
+		// (first this will look it up locally if it is in the diaspora-contact cache)
 		// This will also convert diaspora public key from pkcs#1 to pkcs#8
-
-		Logger::notice('Fetching key for '.$author_link);
-		$key = self::key($author_link);
-
+		Logger::notice('Fetching key for ' . $author);
+		$key = self::key($author);
 		if (!$key) {
 			Logger::notice('Could not retrieve author key.');
 			throw new \Friendica\Network\HTTPException\BadRequestException();
@@ -465,9 +473,9 @@ class Diaspora
 		Logger::notice('Message verified.');
 
 		return [
-			'message' => (string)$inner_decrypted,
-			'author' => XML::unescape($author_link),
-			'key' => (string)$key
+			'message' => $inner_decrypted,
+			'author'  => $author->getAddr(),
+			'key'     => $key
 		];
 	}
 
@@ -520,7 +528,7 @@ class Diaspora
 	{
 		// The sender is the handle of the contact that sent the message.
 		// This will often be different with relayed messages (for example "like" and "comment")
-		$sender = $msg['author'];
+		$sender = WebFingerUri::fromString($msg['author']);
 
 		// This is only needed for private postings since this is already done for public ones before
 		if (is_null($fields)) {
@@ -535,7 +543,7 @@ class Diaspora
 
 		$type = $fields->getName();
 
-		Logger::info('Received message', ['type' => $type, 'sender' => $sender, 'user' => $importer['uid']]);
+		Logger::info('Received message', ['type' => $type, 'sender' => $sender->getAddr(), 'user' => $importer['uid']]);
 
 		switch ($type) {
 			case 'account_migration':
@@ -743,7 +751,7 @@ class Diaspora
 		}
 
 		if (isset($parent_author_signature)) {
-			$key = self::key($msg['author']);
+			$key = self::key(WebFingerUri::fromString($msg['author']));
 			if (empty($key)) {
 				Logger::info('No key found for parent', ['author' => $msg['author']]);
 				return false;
@@ -755,8 +763,12 @@ class Diaspora
 			}
 		}
 
-		$key = self::key($fields->author);
-		if (empty($key)) {
+		try {
+			$key = self::key(WebFingerUri::fromString($fields->author));
+			if (empty($key)) {
+				throw new \InvalidArgumentException();
+			}
+		} catch (\Throwable $e) {
 			Logger::info('No key found', ['author' => $fields->author]);
 			return false;
 		}
@@ -772,55 +784,51 @@ class Diaspora
 	/**
 	 * Fetches the public key for a given handle
 	 *
-	 * @param string $handle The handle
+	 * @param WebFingerUri $uri The handle
 	 *
 	 * @return string The public key
-	 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
+	 * @throws InternalServerErrorException
 	 * @throws \ImagickException
 	 */
-	private static function key(string $handle = null): string
+	private static function key(WebFingerUri $uri): string
 	{
-		$handle = strval($handle);
-
-		Logger::notice('Fetching diaspora key', ['handle' => $handle, 'callstack' => System::callstack(20)]);
-
-		$fcontact = FContact::getByURL($handle);
-		if (!empty($fcontact['pubkey'])) {
-			return $fcontact['pubkey'];
+		Logger::notice('Fetching diaspora key', ['handle' => $uri->getAddr(), 'callstack' => System::callstack(20)]);
+		try {
+			return DI::dsprContact()->getByAddr($uri)->pubKey;
+		} catch (HTTPException\NotFoundException|\InvalidArgumentException $e) {
+			return '';
 		}
-
-		return '';
 	}
 
 	/**
 	 * Get a contact id for a given handle
 	 *
-	 * @todo  Move to Friendica\Model\Contact
-	 *
-	 * @param int    $uid    The user id
-	 * @param string $handle The handle in the format user@domain.tld
+	 * @param int          $uid The user id
+	 * @param WebFingerUri $uri
 	 *
 	 * @return array Contact data
 	 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 	 * @throws \ImagickException
 	 */
-	private static function contactByHandle(int $uid, string $handle): array
+	private static function contactByHandle(int $uid, WebFingerUri $uri): array
 	{
-		return Contact::getByURL($handle, null, [], $uid);
+		return Contact::getByURL($uri->getAddr(), null, [], $uid);
 	}
 
 	/**
 	 * Checks if the given contact url does support ActivityPub
 	 *
-	 * @param string  $url    profile url
-	 * @param boolean $update true = always update, false = never update, null = update when not found or outdated
+	 * @param string       $url    profile url or WebFinger address
+	 * @param boolean|null $update true = always update, false = never update, null = update when not found or outdated
 	 * @return boolean
 	 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 	 * @throws \ImagickException
 	 */
-	public static function isSupportedByContactUrl(string $url, $update = null)
+	public static function isSupportedByContactUrl(string $url, ?bool $update = null): bool
 	{
-		return !empty(FContact::getByURL($url, $update));
+		$contact = Contact::getByURL($url, $update);
+
+		return DI::dsprContact()->existsByUriId($contact['uri-id'] ?? 0);
 	}
 
 	/**
@@ -874,21 +882,22 @@ class Diaspora
 	/**
 	 * Fetches the contact id for a handle and checks if posting is allowed
 	 *
-	 * @param array  $importer   Array of the importer user
-	 * @param string $handle     The checked handle in the format user@domain.tld
-	 * @param bool   $is_comment Is the check for a comment?
+	 * @param array        $importer    Array of the importer user
+	 * @param WebFingerUri $contact_uri The checked contact
+	 * @param bool         $is_comment  Is the check for a comment?
 	 *
 	 * @return array|bool The contact data or false on error
-	 * @throws \Exception
+	 * @throws InternalServerErrorException
+	 * @throws \ImagickException
 	 */
-	private static function allowedContactByHandle(array $importer, string $handle, bool $is_comment = false)
+	private static function allowedContactByHandle(array $importer, WebFingerUri $contact_uri, bool $is_comment = false)
 	{
-		$contact = self::contactByHandle($importer['uid'], $handle);
+		$contact = self::contactByHandle($importer['uid'], $contact_uri);
 		if (!$contact) {
-			Logger::notice('A Contact for handle ' . $handle . ' and user ' . $importer['uid'] . ' was not found');
+			Logger::notice('A Contact for handle ' . $contact_uri . ' and user ' . $importer['uid'] . ' was not found');
 			// If a contact isn't found, we accept it anyway if it is a comment
 			if ($is_comment && ($importer['uid'] != 0)) {
-				return self::contactByHandle(0, $handle);
+				return self::contactByHandle(0, $contact_uri);
 			} elseif ($is_comment) {
 				return $importer;
 			} else {
@@ -897,7 +906,7 @@ class Diaspora
 		}
 
 		if (!self::postAllow($importer, $contact, $is_comment)) {
-			Logger::notice('The handle: ' . $handle . ' is not allowed to post to user ' . $importer['uid']);
+			Logger::notice('The handle: ' . $contact_uri . ' is not allowed to post to user ' . $importer['uid']);
 			return false;
 		}
 		return $contact;
@@ -966,7 +975,7 @@ class Diaspora
 				// 0 => '[url=/people/0123456789abcdef]Foo Bar[/url]'
 				// 1 => '0123456789abcdef'
 				// 2 => 'Foo Bar'
-				$handle = FContact::getUrlByGuid($match[1]);
+				$handle = DI::dsprContact()->getUrlByGuid($match[1]);
 
 				if ($handle) {
 					$return = '@[url=' . $handle . ']' . $match[2] . '[/url]';
@@ -1011,7 +1020,7 @@ class Diaspora
 	 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 	 * @throws \ImagickException
 	 */
-	public static function storeByGuid(string $guid, string $server, bool $force)
+	private static function storeByGuid(string $guid, string $server, bool $force)
 	{
 		$serverparts = parse_url($server);
 
@@ -1092,25 +1101,27 @@ class Diaspora
 			return self::message($source_xml->root_guid, $server, ++$level);
 		}
 
-		$author = '';
+		$author_handle = '';
 
 		// Fetch the author - for the old and the new Diaspora version
 		if ($source_xml->post->status_message && $source_xml->post->status_message->diaspora_handle) {
-			$author = (string)$source_xml->post->status_message->diaspora_handle;
+			$author_handle = (string)$source_xml->post->status_message->diaspora_handle;
 		} elseif ($source_xml->author && ($source_xml->getName() == 'status_message')) {
-			$author = (string)$source_xml->author;
+			$author_handle = (string)$source_xml->author;
 		}
 
-		// If this isn't a "status_message" then quit
-		if (!$author) {
+		try {
+			$author = WebFingerUri::fromString($author_handle);
+		} catch (\InvalidArgumentException $e) {
+			// If this isn't a "status_message" then quit
 			Logger::info("Message doesn't seem to be a status message");
 			return false;
 		}
 
 		return [
 			'message' => $x,
-			'author' => $author,
-			'key' => self::key($author)
+			'author'  => $author->getAddr(),
+			'key'     => self::key($author)
 		];
 	}
 
@@ -1157,15 +1168,15 @@ class Diaspora
 	/**
 	 * Fetches the item record of a given guid
 	 *
-	 * @param int    $uid     The user id
-	 * @param string $guid    message guid
-	 * @param string $author  The handle of the item
-	 * @param array  $contact The contact of the item owner
+	 * @param int          $uid     The user id
+	 * @param string       $guid    message guid
+	 * @param WebFingerUri $author
+	 * @param array        $contact The contact of the item owner
 	 *
 	 * @return array|bool the item record or false on failure
 	 * @throws \Exception
 	 */
-	private static function parentItem(int $uid, string $guid, string $author, array $contact)
+	private static function parentItem(int $uid, string $guid, WebFingerUri $author, array $contact)
 	{
 		$fields = ['id', 'parent', 'body', 'wall', 'uri', 'guid', 'private', 'origin',
 			'author-name', 'author-link', 'author-avatar', 'gravity',
@@ -1175,18 +1186,21 @@ class Diaspora
 		$item = Post::selectFirst($fields, $condition);
 
 		if (!DBA::isResult($item)) {
-			$person = FContact::getByURL($author);
-			$result = self::storeByGuid($guid, $person['url'], false);
+			try {
+				$result = self::storeByGuid($guid, DI::dsprContact()->getByAddr($author)->url, false);
 
-			// We don't have an url for items that arrived at the public dispatcher
-			if (!$result && !empty($contact['url'])) {
-				$result = self::storeByGuid($guid, $contact['url'], false);
-			}
+				// We don't have an url for items that arrived at the public dispatcher
+				if (!$result && !empty($contact['url'])) {
+					$result = self::storeByGuid($guid, $contact['url'], false);
+				}
 
-			if ($result) {
-				Logger::info('Fetched missing item ' . $guid . ' - result: ' . $result);
+				if ($result) {
+					Logger::info('Fetched missing item ' . $guid . ' - result: ' . $result);
 
-				$item = Post::selectFirst($fields, $condition);
+					$item = Post::selectFirst($fields, $condition);
+				}
+			} catch (HTTPException\NotFoundException $e) {
+				Logger::notice('Unable to retrieve author details', ['author' => $author->getAddr()]);
 			}
 		}
 
@@ -1200,20 +1214,20 @@ class Diaspora
 	}
 
 	/**
-	 * returns contact details
+	 * returns contact details for the given user
 	 *
-	 * @param array $def_contact The default contact if the person isn't found
-	 * @param array $person      The record of the person
-	 * @param int   $uid         The user id
+	 * @param array  $def_contact The default details if the contact isn't found
+	 * @param string $contact_url The url of the contact
+	 * @param int    $uid         The user id
 	 *
 	 * @return array
 	 *      'cid' => contact id
 	 *      'network' => network type
 	 * @throws \Exception
 	 */
-	private static function authorContactByUrl(array $def_contact, array $person, int $uid): array
+	private static function authorContactByUrl(array $def_contact, string $contact_url, int $uid): array
 	{
-		$condition = ['nurl' => Strings::normaliseLink($person['url']), 'uid' => $uid];
+		$condition = ['nurl' => Strings::normaliseLink($contact_url), 'uid' => $uid];
 		$contact = DBA::selectFirst('contact', ['id', 'network'], $condition);
 		if (DBA::isResult($contact)) {
 			$cid = $contact['id'];
@@ -1318,21 +1332,27 @@ class Diaspora
 	 */
 	private static function receiveAccountMigration(array $importer, SimpleXMLElement $data): bool
 	{
-		$old_handle = XML::unescape($data->author);
-		$new_handle = XML::unescape($data->profile->author);
-		$signature = XML::unescape($data->signature);
-
-		$contact = self::contactByHandle($importer['uid'], $old_handle);
-		if (!$contact) {
-			Logger::notice('Cannot find contact for sender: ' . $old_handle . ' and user ' . $importer['uid']);
+		try {
+			$old_author = WebFingerUri::fromString(XML::unescape($data->author));
+			$new_author = WebFingerUri::fromString(XML::unescape($data->profile->author));
+		} catch (\Throwable $e) {
+			Logger::notice('Cannot find handles for sender and user', ['data' => $data]);
 			return false;
 		}
 
-		Logger::notice('Got migration for ' . $old_handle . ', to ' . $new_handle . ' with user ' . $importer['uid']);
+		$signature = XML::unescape($data->signature);
+
+		$contact = self::contactByHandle($importer['uid'], $old_author);
+		if (!$contact) {
+			Logger::notice('Cannot find contact for sender: ' . $old_author . ' and user ' . $importer['uid']);
+			return false;
+		}
+
+		Logger::notice('Got migration for ' . $old_author . ', to ' . $new_author . ' with user ' . $importer['uid']);
 
 		// Check signature
-		$signed_text = 'AccountMigration:' . $old_handle . ':' . $new_handle;
-		$key = self::key($old_handle);
+		$signed_text = 'AccountMigration:' . $old_author . ':' . $new_author;
+		$key = self::key($old_author);
 		if (!Crypto::rsaVerify($signed_text, $signature, $key, 'sha256')) {
 			Logger::notice('No valid signature for migration.');
 			return false;
@@ -1342,9 +1362,9 @@ class Diaspora
 		self::receiveProfile($importer, $data->profile);
 
 		// change the technical stuff in contact
-		$data = Probe::uri($new_handle);
+		$data = Probe::uri($new_author);
 		if ($data['network'] == Protocol::PHANTOM) {
-			Logger::notice("Account for " . $new_handle . " couldn't be probed.");
+			Logger::notice("Account for " . $new_author . " couldn't be probed.");
 			return false;
 		}
 
@@ -1360,7 +1380,7 @@ class Diaspora
 			'network' => $data['network'],
 		];
 
-		Contact::update($fields, ['addr' => $old_handle]);
+		Contact::update($fields, ['addr' => $old_author->getAddr()]);
 
 		Logger::notice('Contacts are updated.');
 
@@ -1377,15 +1397,15 @@ class Diaspora
 	 */
 	private static function receiveAccountDeletion(SimpleXMLElement $data): bool
 	{
-		$author = XML::unescape($data->author);
+		$author_handle = XML::unescape($data->author);
 
-		$contacts = DBA::select('contact', ['id'], ['addr' => $author]);
+		$contacts = DBA::select('contact', ['id'], ['addr' => $author_handle]);
 		while ($contact = DBA::fetch($contacts)) {
 			Contact::remove($contact['id']);
 		}
 		DBA::close($contacts);
 
-		Logger::notice('Removed contacts for ' . $author);
+		Logger::notice('Removed contacts for ' . $author_handle);
 
 		return true;
 	}
@@ -1393,27 +1413,24 @@ class Diaspora
 	/**
 	 * Fetch the uri from our database if we already have this item (maybe from ourselves)
 	 *
-	 * @param string  $author    Author handle
-	 * @param string  $guid      Message guid
-	 * @param boolean $onlyfound Only return uri when found in the database
+	 * @param string            $guid       Message guid
+	 * @param WebFingerUri|null $person_uri Optional person to derive the base URL from
 	 *
-	 * @return string The constructed uri or the one from our database or empty string on if $onlyfound is true
+	 * @return string The constructed uri or the one from our database or empty string
 	 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 	 * @throws \ImagickException
 	 */
-	private static function getUriFromGuid(string $author, string $guid, bool $onlyfound = false): string
+	private static function getUriFromGuid(string $guid, WebFingerUri $person_uri = null): string
 	{
 		$item = Post::selectFirst(['uri'], ['guid' => $guid]);
-		if (DBA::isResult($item)) {
+		if ($item) {
 			return $item['uri'];
-		} elseif (!$onlyfound) {
-			$person = FContact::getByURL($author);
-
-			$parts = parse_url($person['url']);
-			unset($parts['path']);
-			$host_url = (string)Uri::fromParts($parts);
-
-			return $host_url . '/objects/' . $guid;
+		} elseif ($person_uri) {
+			try {
+				return DI::dsprContact()->selectOneByAddr($person_uri)->baseurl . '/objects/' . $guid;
+			} catch (HTTPException\NotFoundException|\InvalidArgumentException $e) {
+				return '';
+			}
 		}
 
 		return '';
@@ -1444,31 +1461,31 @@ class Diaspora
 				continue;
 			}
 
-			$person = FContact::getByURL($match[3]);
-			if (empty($person)) {
-				continue;
-			}
+			try {
+				$contact = DI::dsprContact()->getByUrl(new Uri($match[3]));
+				Tag::storeByHash($uriid, $match[1], $contact->name ?: $contact->nick, $contact->url);
+			} catch (\Throwable $e) {
 
-			Tag::storeByHash($uriid, $match[1], $person['name'] ?: $person['nick'], $person['url']);
+			}
 		}
 	}
 
 	/**
 	 * Processes an incoming comment
 	 *
-	 * @param array  $importer  Array of the importer user
-	 * @param string $sender    The sender of the message
+	 * @param array            $importer  Array of the importer user
+	 * @param WebFingerUri     $sender    The sender of the message
 	 * @param SimpleXMLElement $data      The message object
-	 * @param string $xml       The original XML of the message
-	 * @param int    $direction Indicates if the message had been fetched or pushed (self::PUSHED, self::FETCHED, self::FORCED_FETCH)
+	 * @param string           $xml       The original XML of the message
+	 * @param int              $direction Indicates if the message had been fetched or pushed (self::PUSHED, self::FETCHED, self::FORCED_FETCH)
 	 *
-	 * @return int The message id of the generated comment or "false" if there was an error
+	 * @return bool The message id of the generated comment or "false" if there was an error
 	 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 	 * @throws \ImagickException
 	 */
-	private static function receiveComment(array $importer, string $sender, SimpleXMLElement $data, string $xml, int $direction): bool
+	private static function receiveComment(array $importer, WebFingerUri $sender, SimpleXMLElement $data, string $xml, int $direction): bool
 	{
-		$author = XML::unescape($data->author);
+		$author = WebFingerUri::fromString(XML::unescape($data->author));
 		$guid = XML::unescape($data->guid);
 		$parent_guid = XML::unescape($data->parent_guid);
 		$text = XML::unescape($data->text);
@@ -1481,7 +1498,7 @@ class Diaspora
 
 		if (isset($data->thread_parent_guid)) {
 			$thread_parent_guid = XML::unescape($data->thread_parent_guid);
-			$thr_parent = self::getUriFromGuid('', $thread_parent_guid, true);
+			$thr_parent = self::getUriFromGuid($thread_parent_guid);
 		} else {
 			$thr_parent = '';
 		}
@@ -1505,14 +1522,15 @@ class Diaspora
 			return false;
 		}
 
-		$person = FContact::getByURL($author);
-		if (!is_array($person)) {
-			Logger::notice('Unable to find author details');
+		try {
+			$author_url = (string)DI::dsprContact()->getByAddr($author)->url;
+		} catch (HTTPException\NotFoundException|\InvalidArgumentException $e) {
+			Logger::notice('Unable to find author details', ['author' => $author->getAddr()]);
 			return false;
 		}
 
 		// Fetch the contact id - if we know this contact
-		$author_contact = self::authorContactByUrl($contact, $person, $importer['uid']);
+		$author_contact = self::authorContactByUrl($contact, $author_url, $importer['uid']);
 
 		$datarray = [];
 
@@ -1520,17 +1538,17 @@ class Diaspora
 		$datarray['contact-id'] = $author_contact['cid'];
 		$datarray['network']  = $author_contact['network'];
 
-		$datarray['author-link'] = $person['url'];
-		$datarray['author-id'] = Contact::getIdForURL($person['url'], 0);
+		$datarray['author-link'] = $author_url;
+		$datarray['author-id'] = Contact::getIdForURL($author_url);
 
 		$datarray['owner-link'] = $contact['url'];
-		$datarray['owner-id'] = Contact::getIdForURL($contact['url'], 0);
+		$datarray['owner-id'] = Contact::getIdForURL($contact['url']);
 
 		// Will be overwritten for sharing accounts in Item::insert
 		$datarray = self::setDirection($datarray, $direction);
 
 		$datarray['guid'] = $guid;
-		$datarray['uri'] = self::getUriFromGuid($author, $guid);
+		$datarray['uri'] = self::getUriFromGuid($guid, $author);
 		$datarray['uri-id'] = ItemURI::insert(['uri' => $datarray['uri'], 'guid' => $datarray['guid']]);
 
 		$datarray['verb'] = Activity::POST;
@@ -1551,7 +1569,7 @@ class Diaspora
 		$datarray['plink'] = self::plink($author, $guid, $toplevel_parent_item['guid']);
 		$body = Markdown::toBBCode($text);
 
-		$datarray['body'] = self::replacePeopleGuid($body, $person['url']);
+		$datarray['body'] = self::replacePeopleGuid($body, $author_url);
 
 		self::storeMentions($datarray['uri-id'], $text);
 		Tag::storeRawTagsFromBody($datarray['uri-id'], $datarray['body']);
@@ -1601,20 +1619,26 @@ class Diaspora
 	 */
 	private static function receiveConversationMessage(array $importer, array $contact, SimpleXMLElement $data, array $msg, $mesg, array $conversation): bool
 	{
-		$author = XML::unescape($data->author);
+		$author_handle = XML::unescape($data->author);
 		$guid = XML::unescape($data->guid);
 		$subject = XML::unescape($data->subject);
 
 		// "diaspora_handle" is the element name from the old version
 		// "author" is the element name from the new version
 		if ($mesg->author) {
-			$msg_author = XML::unescape($mesg->author);
+			$msg_author_handle = XML::unescape($mesg->author);
 		} elseif ($mesg->diaspora_handle) {
-			$msg_author = XML::unescape($mesg->diaspora_handle);
+			$msg_author_handle = XML::unescape($mesg->diaspora_handle);
 		} else {
 			return false;
 		}
 
+		try {
+			$msg_author_uri = WebFingerUri::fromString($msg_author_handle);
+		} catch (\InvalidArgumentException $e) {
+			return false;
+		}
+
 		$msg_guid = XML::unescape($mesg->guid);
 		$msg_conversation_guid = XML::unescape($mesg->conversation_guid);
 		$msg_text = XML::unescape($mesg->text);
@@ -1625,23 +1649,20 @@ class Diaspora
 			return false;
 		}
 
-		$body = Markdown::toBBCode($msg_text);
-		$message_uri = $msg_author . ':' . $msg_guid;
-
-		$person = FContact::getByURL($msg_author);
+		$msg_author = DI::dsprContact()->getByAddr($msg_author_uri);
 
 		return Mail::insert([
 			'uid'        => $importer['uid'],
 			'guid'       => $msg_guid,
 			'convid'     => $conversation['id'],
-			'from-name'  => $person['name'],
-			'from-photo' => $person['photo'],
-			'from-url'   => $person['url'],
+			'from-name'  => $msg_author->name,
+			'from-photo' => (string)$msg_author->photo,
+			'from-url'   => (string)$msg_author->url,
 			'contact-id' => $contact['id'],
 			'title'      => $subject,
-			'body'       => $body,
-			'uri'        => $message_uri,
-			'parent-uri' => $author . ':' . $guid,
+			'body'       => Markdown::toBBCode($msg_text),
+			'uri'        => $msg_author_handle . ':' . $msg_guid,
+			'parent-uri' => $author_handle . ':' . $guid,
 			'created'    => $msg_created_at
 		]);
 	}
@@ -1658,7 +1679,7 @@ class Diaspora
 	 */
 	private static function receiveConversation(array $importer, array $msg, SimpleXMLElement $data)
 	{
-		$author = XML::unescape($data->author);
+		$author_handle = XML::unescape($data->author);
 		$guid = XML::unescape($data->guid);
 		$subject = XML::unescape($data->subject);
 		$created_at = DateTimeFormat::utc(XML::unescape($data->created_at));
@@ -1671,7 +1692,7 @@ class Diaspora
 			return false;
 		}
 
-		$contact = self::allowedContactByHandle($importer, $msg['author'], true);
+		$contact = self::allowedContactByHandle($importer, WebFingerUri::fromString($msg['author']), true);
 		if (!$contact) {
 			return false;
 		}
@@ -1685,7 +1706,7 @@ class Diaspora
 			$r = DBA::insert('conv', [
 				'uid'     => $importer['uid'],
 				'guid'    => $guid,
-				'creator' => $author,
+				'creator' => $author_handle,
 				'created' => $created_at,
 				'updated' => DateTimeFormat::utcNow(),
 				'subject' => $subject,
@@ -1711,18 +1732,18 @@ class Diaspora
 	/**
 	 * Processes "like" messages
 	 *
-	 * @param array  $importer  Array of the importer user
-	 * @param string $sender    The sender of the message
+	 * @param array            $importer  Array of the importer user
+	 * @param WebFingerUri     $sender    The sender of the message
 	 * @param SimpleXMLElement $data      The message object
-	 * @param int    $direction Indicates if the message had been fetched or pushed (self::PUSHED, self::FETCHED, self::FORCED_FETCH)
+	 * @param int              $direction Indicates if the message had been fetched or pushed (self::PUSHED, self::FETCHED, self::FORCED_FETCH)
 	 *
 	 * @return bool Success or failure
 	 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 	 * @throws \ImagickException
 	 */
-	private static function receiveLike(array $importer, string $sender, SimpleXMLElement $data, int $direction): bool
+	private static function receiveLike(array $importer, WebFingerUri $sender, SimpleXMLElement $data, int $direction): bool
 	{
-		$author = XML::unescape($data->author);
+		$author = WebFingerUri::fromString(XML::unescape($data->author));
 		$guid = XML::unescape($data->guid);
 		$parent_guid = XML::unescape($data->parent_guid);
 		$parent_type = XML::unescape($data->parent_type);
@@ -1753,14 +1774,15 @@ class Diaspora
 			return false;
 		}
 
-		$person = FContact::getByURL($author);
-		if (!is_array($person)) {
-			Logger::notice('Unable to find author details');
+		try {
+			$author_url = (string)DI::dsprContact()->getByAddr($author)->url;
+		} catch (HTTPException\NotFoundException|\InvalidArgumentException $e) {
+			Logger::notice('Unable to find author details', ['author' => $author->getAddr()]);
 			return false;
 		}
 
 		// Fetch the contact id - if we know this contact
-		$author_contact = self::authorContactByUrl($contact, $person, $importer['uid']);
+		$author_contact = self::authorContactByUrl($contact, $author_url, $importer['uid']);
 
 		// "positive" = "false" would be a Dislike - wich isn't currently supported by Diaspora
 		// We would accept this anyhow.
@@ -1780,11 +1802,11 @@ class Diaspora
 
 		$datarray = self::setDirection($datarray, $direction);
 
-		$datarray['owner-link'] = $datarray['author-link'] = $person['url'];
-		$datarray['owner-id'] = $datarray['author-id'] = Contact::getIdForURL($person['url'], 0);
+		$datarray['owner-link'] = $datarray['author-link'] = $author_url;
+		$datarray['owner-id'] = $datarray['author-id'] = Contact::getIdForURL($author_url);
 
 		$datarray['guid'] = $guid;
-		$datarray['uri'] = self::getUriFromGuid($author, $guid);
+		$datarray['uri'] = self::getUriFromGuid($guid, $author);
 
 		$datarray['verb'] = $verb;
 		$datarray['gravity'] = Item::GRAVITY_ACTIVITY;
@@ -1843,13 +1865,13 @@ class Diaspora
 	 */
 	private static function receiveMessage(array $importer, SimpleXMLElement $data): bool
 	{
-		$author = XML::unescape($data->author);
+		$author_uri = WebFingerUri::fromString(XML::unescape($data->author));
 		$guid = XML::unescape($data->guid);
 		$conversation_guid = XML::unescape($data->conversation_guid);
 		$text = XML::unescape($data->text);
 		$created_at = DateTimeFormat::utc(XML::unescape($data->created_at));
 
-		$contact = self::allowedContactByHandle($importer, $author, true);
+		$contact = self::allowedContactByHandle($importer, $author_uri, true);
 		if (!$contact) {
 			return false;
 		}
@@ -1858,41 +1880,37 @@ class Diaspora
 			GServer::setProtocol($contact['gsid'], Post\DeliveryData::DIASPORA);
 		}
 
-		$conversation = null;
-
 		$condition = ['uid' => $importer['uid'], 'guid' => $conversation_guid];
 		$conversation = DBA::selectFirst('conv', [], $condition);
-
 		if (!DBA::isResult($conversation)) {
 			Logger::notice('Conversation not available.');
 			return false;
 		}
 
-		$message_uri = $author . ':' . $guid;
-
-		$person = FContact::getByURL($author);
-		if (!$person) {
-			Logger::notice('Unable to find author details');
+		try {
+			$author = DI::dsprContact()->getByAddr($author_uri);
+		} catch (HTTPException\NotFoundException|\InvalidArgumentException $e) {
+			Logger::notice('Unable to find author details', ['author' => $author_uri->getAddr()]);
 			return false;
 		}
 
 		$body = Markdown::toBBCode($text);
 
-		$body = self::replacePeopleGuid($body, $person['url']);
+		$body = self::replacePeopleGuid($body, $author->url);
 
 		return Mail::insert([
 			'uid'        => $importer['uid'],
 			'guid'       => $guid,
 			'convid'     => $conversation['id'],
-			'from-name'  => $person['name'],
-			'from-photo' => $person['photo'],
-			'from-url'   => $person['url'],
+			'from-name'  => $author->name,
+			'from-photo' => (string)$author->photo,
+			'from-url'   => (string)$author->url,
 			'contact-id' => $contact['id'],
 			'title'      => $conversation['subject'],
 			'body'       => $body,
 			'reply'      => 1,
-			'uri'        => $message_uri,
-			'parent-uri' => $author . ':' . $conversation['guid'],
+			'uri'        => $author_uri . ':' . $guid,
+			'parent-uri' => $author_uri . ':' . $conversation['guid'],
 			'created'    => $created_at
 		]);
 	}
@@ -1910,7 +1928,7 @@ class Diaspora
 	 */
 	private static function receiveParticipation(array $importer, SimpleXMLElement $data, int $direction): bool
 	{
-		$author = strtolower(XML::unescape($data->author));
+		$author = WebFingerUri::fromString(strtolower(XML::unescape($data->author)));
 		$guid = XML::unescape($data->guid);
 		$parent_guid = XML::unescape($data->parent_guid);
 
@@ -1941,13 +1959,14 @@ class Diaspora
 			return false;
 		}
 
-		$person = FContact::getByURL($author);
-		if (!is_array($person)) {
-			Logger::notice('Person not found: ' . $author);
+		try {
+			$author_url = (string)DI::dsprContact()->getByAddr($author)->url;
+		} catch (HTTPException\NotFoundException|\InvalidArgumentException $e) {
+			Logger::notice('unable to find author details', ['author' => $author->getAddr()]);
 			return false;
 		}
 
-		$author_contact = self::authorContactByUrl($contact, $person, $importer['uid']);
+		$author_contact = self::authorContactByUrl($contact, $author_url, $importer['uid']);
 
 		// Store participation
 		$datarray = [];
@@ -1960,11 +1979,11 @@ class Diaspora
 
 		$datarray = self::setDirection($datarray, $direction);
 
-		$datarray['owner-link'] = $datarray['author-link'] = $person['url'];
-		$datarray['owner-id'] = $datarray['author-id'] = Contact::getIdForURL($person['url'], 0);
+		$datarray['owner-link'] = $datarray['author-link'] = $author_url;
+		$datarray['owner-id'] = $datarray['author-id'] = Contact::getIdForURL($author_url);
 
 		$datarray['guid'] = $guid;
-		$datarray['uri'] = self::getUriFromGuid($author, $guid);
+		$datarray['uri'] = self::getUriFromGuid($guid, $author);
 
 		$datarray['verb'] = Activity::FOLLOW;
 		$datarray['gravity'] = Item::GRAVITY_ACTIVITY;
@@ -2056,7 +2075,7 @@ class Diaspora
 	 */
 	private static function receiveProfile(array $importer, SimpleXMLElement $data): bool
 	{
-		$author = strtolower(XML::unescape($data->author));
+		$author = WebFingerUri::fromString(strtolower(XML::unescape($data->author)));
 
 		$contact = self::contactByHandle($importer['uid'], $author);
 		if (!$contact) {
@@ -2084,16 +2103,13 @@ class Diaspora
 
 		$keywords = implode(', ', $keywords);
 
-		$handle_parts = explode('@', $author);
-		$nick = $handle_parts[0];
-
 		if ($name === '') {
-			$name = $handle_parts[0];
+			$name = $author->getUser();
 		}
 
 		if (preg_match('|^https?://|', $image_url) === 0) {
 			// @TODO No HTTPS here?
-			$image_url = 'http://' . $handle_parts[1] . $image_url;
+			$image_url = 'http://' . $author->getFullHost() . $image_url;
 		}
 
 		Contact::updateAvatar($contact['id'], $image_url);
@@ -2115,7 +2131,7 @@ class Diaspora
 
 		$fields = ['name' => $name, 'location' => $location,
 			'name-date' => DateTimeFormat::utcNow(), 'about' => $about,
-			'addr' => $author, 'nick' => $nick, 'keywords' => $keywords,
+			'addr' => $author->getAddr(), 'nick' => $author->getUser(), 'keywords' => $keywords,
 			'unsearchable' => !$searchable, 'sensitive' => $nsfw];
 
 		if (!empty($birthday)) {
@@ -2158,13 +2174,15 @@ class Diaspora
 	 */
 	private static function receiveContactRequest(array $importer, SimpleXMLElement $data): bool
 	{
-		$author = XML::unescape($data->author);
+		$author_handle = XML::unescape($data->author);
 		$recipient = XML::unescape($data->recipient);
 
-		if (!$author || !$recipient) {
+		if (!$author_handle || !$recipient) {
 			return false;
 		}
 
+		$author = WebFingerUri::fromString($author_handle);
+
 		// the current protocol version doesn't know these fields
 		// That means that we will assume their existance
 		if (isset($data->following)) {
@@ -2222,22 +2240,24 @@ class Diaspora
 			Logger::info("Author " . $author . " wants to listen to us.");
 		}
 
-		$ret = FContact::getByURL($author);
-
-		if (!$ret || ($ret['network'] != Protocol::DIASPORA)) {
-			Logger::notice("Cannot resolve diaspora handle " . $author . " for ".$recipient);
+		try {
+			$author_url = (string)DI::dsprContact()->getByAddr($author)->url;
+		} catch (HTTPException\NotFoundException|\InvalidArgumentException $e) {
+			Logger::notice('Cannot resolve diaspora handle for recipient', ['author' => $author->getAddr(), 'recipient' => $recipient]);
 			return false;
 		}
 
-		$cid = Contact::getIdForURL($ret['url'], $importer['uid']);
+		$cid = Contact::getIdForURL($author_url, $importer['uid']);
 		if (!empty($cid)) {
 			$contact = DBA::selectFirst('contact', [], ['id' => $cid, 'network' => Protocol::NATIVE_SUPPORT]);
 		} else {
 			$contact = [];
 		}
 
-		$item = ['author-id' => Contact::getIdForURL($ret['url']),
-			'author-link' => $ret['url']];
+		$item = [
+			'author-id'   => Contact::getIdForURL($author_url),
+			'author-link' => $author_url
+		];
 
 		$result = Contact::addRelationship($importer, $contact, $item, false);
 		if ($result === true) {
@@ -2262,12 +2282,15 @@ class Diaspora
 	/**
 	 * Stores a reshare activity
 	 *
-	 * @param array   $item              Array of reshare post
-	 * @param integer $parent_message_id Id of the parent post
-	 * @param string  $guid              GUID string of reshare action
-	 * @param string  $author            Author handle
+	 * @param array        $item              Array of reshare post
+	 * @param integer      $parent_message_id Id of the parent post
+	 * @param string       $guid              GUID string of reshare action
+	 * @param WebFingerUri $author            Author handle
+	 * @return false|void
+	 * @throws InternalServerErrorException
+	 * @throws \ImagickException
 	 */
-	private static function addReshareActivity(array $item, int $parent_message_id, string $guid, string $author)
+	private static function addReshareActivity(array $item, int $parent_message_id, string $guid, WebFingerUri $author)
 	{
 		$parent = Post::selectFirst(['uri', 'guid'], ['id' => $parent_message_id]);
 
@@ -2284,7 +2307,7 @@ class Diaspora
 		$datarray['owner-id'] = $datarray['author-id'];
 
 		$datarray['guid'] = $parent['guid'] . '-' . $guid;
-		$datarray['uri'] = self::getUriFromGuid($author, $datarray['guid']);
+		$datarray['uri'] = self::getUriFromGuid($datarray['guid'], $author);
 		$datarray['thr-parent'] = $parent['uri'];
 
 		$datarray['verb'] = $datarray['body'] = Activity::ANNOUNCE;
@@ -2329,15 +2352,20 @@ class Diaspora
 	 */
 	private static function receiveReshare(array $importer, SimpleXMLElement $data, string $xml, int $direction): bool
 	{
-		$author = XML::unescape($data->author);
+		$author = WebFingerUri::fromString(XML::unescape($data->author));
 		$guid = XML::unescape($data->guid);
 		$created_at = DateTimeFormat::utc(XML::unescape($data->created_at));
-		$root_author = XML::unescape($data->root_author);
+		try {
+			$root_author = WebFingerUri::fromString(XML::unescape($data->root_author));
+		} catch (\InvalidArgumentException $e) {
+			return false;
+		}
+
 		$root_guid = XML::unescape($data->root_guid);
 		/// @todo handle unprocessed property "provider_display_name"
 		$public = XML::unescape($data->public);
 
-		$contact = self::allowedContactByHandle($importer, $author, false);
+		$contact = self::allowedContactByHandle($importer, $author);
 		if (!$contact) {
 			return false;
 		}
@@ -2351,8 +2379,9 @@ class Diaspora
 			return true;
 		}
 
-		$original_person = FContact::getByURL($root_author);
-		if (!$original_person) {
+		try {
+			$original_person = DI::dsprContact()->getByAddr($root_author);
+		} catch (HTTPException\NotFoundException $e) {
 			return false;
 		}
 
@@ -2369,7 +2398,7 @@ class Diaspora
 		$datarray['owner-id'] = $datarray['author-id'];
 
 		$datarray['guid'] = $guid;
-		$datarray['uri'] = $datarray['thr-parent'] = self::getUriFromGuid($author, $guid);
+		$datarray['uri'] = $datarray['thr-parent'] = self::getUriFromGuid($guid, $author);
 		$datarray['uri-id'] = ItemURI::insert(['uri' => $datarray['uri'], 'guid' => $datarray['guid']]);
 
 		$datarray['verb'] = Activity::POST;
@@ -2380,7 +2409,7 @@ class Diaspora
 
 		$datarray = self::setDirection($datarray, $direction);
 
-		$datarray['quote-uri-id'] = self::getQuoteUriId($root_guid, $importer['uid'], $original_person['url']);
+		$datarray['quote-uri-id'] = self::getQuoteUriId($root_guid, $importer['uid'], $original_person->url);
 		if (empty($datarray['quote-uri-id'])) {
 			return false;
 		}
@@ -2448,19 +2477,18 @@ class Diaspora
 	 */
 	private static function itemRetraction(array $importer, array $contact, SimpleXMLElement $data): bool
 	{
-		$author = XML::unescape($data->author);
+		$author_uri  = WebFingerUri::fromString(XML::unescape($data->author));
 		$target_guid = XML::unescape($data->target_guid);
 		$target_type = XML::unescape($data->target_type);
 
-		$person = FContact::getByURL($author);
-		if (!is_array($person)) {
-			Logger::notice('Unable to find author detail for ' . $author);
+		try {
+			$author = DI::dsprContact()->getByAddr($author_uri);
+		} catch (HTTPException\NotFoundException|\InvalidArgumentException $e) {
+			Logger::notice('Unable to find details for author', ['author' => $author_uri->getAddr()]);
 			return false;
 		}
 
-		if (empty($contact['url'])) {
-			$contact['url'] = $person['url'];
-		}
+		$contact_url = $contact['url'] ?? '' ?: (string)$author->url;
 
 		// Fetch items that are about to be deleted
 		$fields = ['uid', 'id', 'parent', 'author-link', 'uri-id'];
@@ -2488,8 +2516,8 @@ class Diaspora
 			$parent = Post::selectFirst(['author-link'], ['id' => $item['parent']]);
 
 			// Only delete it if the parent author really fits
-			if (!Strings::compareLink($parent['author-link'], $contact['url']) && !Strings::compareLink($item['author-link'], $contact['url'])) {
-				Logger::info("Thread author " . $parent['author-link'] . " and item author " . $item['author-link'] . " don't fit to expected contact " . $contact['url']);
+			if (!Strings::compareLink($parent['author-link'], $contact_url) && !Strings::compareLink($item['author-link'], $contact_url)) {
+				Logger::info("Thread author " . $parent['author-link'] . " and item author " . $item['author-link'] . " don't fit to expected contact " . $contact_url);
 				continue;
 			}
 
@@ -2505,14 +2533,14 @@ class Diaspora
 	/**
 	 * Receives retraction messages
 	 *
-	 * @param array  $importer Array of the importer user
-	 * @param string $sender   The sender of the message
+	 * @param array            $importer Array of the importer user
+	 * @param WebFingerUri     $sender   The sender of the message
 	 * @param SimpleXMLElement $data     The message object
 	 *
 	 * @return bool Success
 	 * @throws \Exception
 	 */
-	private static function receiveRetraction(array $importer, string $sender, SimpleXMLElement $data)
+	private static function receiveRetraction(array $importer, WebFingerUri $sender, SimpleXMLElement $data)
 	{
 		$target_type = XML::unescape($data->target_type);
 
@@ -2639,14 +2667,14 @@ class Diaspora
 	 */
 	private static function receiveStatusMessage(array $importer, SimpleXMLElement $data, string $xml, int $direction)
 	{
-		$author = XML::unescape($data->author);
+		$author = WebFingerUri::fromString(XML::unescape($data->author));
 		$guid = XML::unescape($data->guid);
 		$created_at = DateTimeFormat::utc(XML::unescape($data->created_at));
 		$public = XML::unescape($data->public);
 		$text = XML::unescape($data->text);
 		$provider_display_name = XML::unescape($data->provider_display_name);
 
-		$contact = self::allowedContactByHandle($importer, $author, false);
+		$contact = self::allowedContactByHandle($importer, $author);
 		if (!$contact) {
 			return false;
 		}
@@ -2672,7 +2700,7 @@ class Diaspora
 		$datarray = [];
 
 		$datarray['guid'] = $guid;
-		$datarray['uri'] = $datarray['thr-parent'] = self::getUriFromGuid($author, $guid);
+		$datarray['uri'] = $datarray['thr-parent'] = self::getUriFromGuid($guid, $author);
 		$datarray['uri-id'] = ItemURI::insert(['uri' => $datarray['uri'], 'guid' => $datarray['guid']]);
 
 		// Attach embedded pictures to the body
@@ -2954,13 +2982,13 @@ class Diaspora
 
 		$logid = Strings::getRandomHex(4);
 
-		// We always try to use the data from the fcontact table.
+		// We always try to use the data from the diaspora-contact table.
 		// This is important for transmitting data to Friendica servers.
-		if (!empty($contact['addr'])) {
-			$fcontact = FContact::getByURL($contact['addr']);
-			if (!empty($fcontact)) {
-				$dest_url = ($public_batch ? $fcontact['batch'] : $fcontact['notify']);
-			}
+		try {
+			$target = DI::dsprContact()->getByAddr(WebFingerUri::fromString($contact['addr']));
+			$dest_url = $public_batch ? $target->batch : $target->notify;
+		} catch (HTTPException\NotFoundException|\InvalidArgumentException $e) {
+
 		}
 
 		if (empty($dest_url)) {
@@ -3029,18 +3057,19 @@ class Diaspora
 		}
 
 		// When sending content to Friendica contacts using the Diaspora protocol
-		// we have to fetch the public key from the fcontact.
+		// we have to fetch the public key from the diaspora-contact.
 		// This is due to the fact that legacy DFRN had unique keys for every contact.
 		$pubkey = $contact['pubkey'];
 		if (!empty($contact['addr'])) {
-			$fcontact = FContact::getByURL($contact['addr']);
-			if (!empty($fcontact)) {
-				$pubkey = $fcontact['pubkey'];
+			try {
+				$pubkey = DI::dsprContact()->getByAddr(WebFingerUri::fromString($contact['addr']))->pubKey;
+			} catch (HTTPException\NotFoundException|\InvalidArgumentException $e) {
+
 			}
 		} else {
 			// The "addr" field should always be filled.
 			// If this isn't the case, it will raise a notice some lines later.
-			// And in the log we will see where it came from and we can handle it there.
+			// And in the log we will see where it came from, and we can handle it there.
 			Logger::notice('Empty addr', ['contact' => $contact ?? [], 'callstack' => System::callstack(20)]);
 		}
 
@@ -3089,16 +3118,16 @@ class Diaspora
 			$owner = User::getOwnerDataById($item['uid']);
 		}
 
-		$author = self::myHandle($owner);
+		$author_handle = self::myHandle($owner);
 
 		$message = [
-			'author' => $author,
+			'author' => $author_handle,
 			'guid' => System::createUUID(),
 			'parent_type' => 'Post',
 			'parent_guid' => $item['guid']
 		];
 
-		Logger::info('Send participation for ' . $item['guid'] . ' by ' . $author);
+		Logger::info('Send participation for ' . $item['guid'] . ' by ' . $author_handle);
 
 		// It doesn't matter what we store, we only want to avoid sending repeated notifications for the same item
 		DI::cache()->set($cachekey, $item['guid'], Duration::QUARTER_HOUR);
@@ -4024,6 +4053,8 @@ class Diaspora
 	 *
 	 * @param integer $parent_id
 	 * @return boolean
+	 * @throws InternalServerErrorException
+	 * @throws \ImagickException
 	 */
 	private static function parentSupportDiaspora(int $parent_id): bool
 	{
@@ -4033,7 +4064,7 @@ class Diaspora
 			return false;
 		}
 
-		if (empty(FContact::getByURL($parent_post['author-link'], false))) {
+		if (!self::isSupportedByContactUrl($parent_post['author-link'], false)) {
 			Logger::info('Parent author is no Diaspora contact.', ['parent-id' => $parent_id]);
 			return false;
 		}
diff --git a/src/Protocol/Diaspora/Entity/DiasporaContact.php b/src/Protocol/Diaspora/Entity/DiasporaContact.php
new file mode 100644
index 000000000..7fbd2831f
--- /dev/null
+++ b/src/Protocol/Diaspora/Entity/DiasporaContact.php
@@ -0,0 +1,140 @@
+<?php
+/**
+ * @copyright Copyright (C) 2010-2022, the Friendica project
+ *
+ * @license GNU AGPL version 3 or any later version
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ *
+ */
+
+namespace Friendica\Protocol\Diaspora\Entity;
+
+use Psr\Http\Message\UriInterface;
+
+/**
+ * @property-read $uriId
+ * @property-read $url
+ * @property-read $guid
+ * @property-read $addr
+ * @property-read $alias
+ * @property-read $nick
+ * @property-read $name
+ * @property-read $givenName
+ * @property-read $familyName
+ * @property-read $photo
+ * @property-read $photoMedium
+ * @property-read $photoSmall
+ * @property-read $batch
+ * @property-read $notify
+ * @property-read $poll
+ * @property-read $subscribe
+ * @property-read $searchable
+ * @property-read $pubKey
+ * @property-read $baseurl
+ * @property-read $gsid
+ * @property-read $created
+ * @property-read $updated
+ * @property-read $interacting_count
+ * @property-read $interacted_count
+ * @property-read $post_count
+ */
+class DiasporaContact extends \Friendica\BaseEntity
+{
+	/** @var int */
+	protected $uriId;
+	/** @var UriInterface */
+	protected $url;
+	/** @var string */
+	protected $guid;
+	/** @var string */
+	protected $addr;
+	/** @var UriInterface */
+	protected $alias;
+	/** @var string */
+	protected $nick;
+	/** @var string */
+	protected $name;
+	/** @var string */
+	protected $givenName;
+	/** @var string */
+	protected $familyName;
+	/** @var UriInterface */
+	protected $photo;
+	/** @var UriInterface */
+	protected $photoMedium;
+	/** @var UriInterface */
+	protected $photoSmall;
+	/** @var UriInterface */
+	protected $batch;
+	/** @var UriInterface */
+	protected $notify;
+	/** @var UriInterface */
+	protected $poll;
+	/** @var UriInterface */
+	protected $subscribe;
+	/** @var bool */
+	protected $searchable;
+	/** @var string */
+	protected $pubKey;
+	/** @var UriInterface */
+	protected $baseurl;
+	/** @var int */
+	protected $gsid;
+	/** @var \DateTime */
+	protected $created;
+	/** @var \DateTime */
+	protected $updated;
+	/** @var int */
+	protected $interacting_count;
+	/** @var int */
+	protected $interacted_count;
+	/** @var int */
+	protected $post_count;
+
+	public function __construct(
+		UriInterface $url, \DateTime $created, string $guid = null, string $addr = null, UriInterface $alias = null,
+		string $nick = null, string $name = null, string $givenName = null, string $familyName = null,
+		UriInterface $photo = null, UriInterface $photoMedium = null, UriInterface $photoSmall = null,
+		UriInterface $batch = null, UriInterface $notify = null, UriInterface $poll = null, UriInterface $subscribe = null,
+		bool $searchable = null, string $pubKey = null, UriInterface $baseurl = null, int $gsid = null,
+		\DateTime $updated = null, int $interacting_count = 0, int $interacted_count = 0, int $post_count = 0, int $uriId = null
+	) {
+		$this->uriId             = $uriId;
+		$this->url               = $url;
+		$this->guid              = $guid;
+		$this->addr              = $addr;
+		$this->alias             = $alias;
+		$this->nick              = $nick;
+		$this->name              = $name;
+		$this->givenName         = $givenName;
+		$this->familyName        = $familyName;
+		$this->photo             = $photo;
+		$this->photoMedium       = $photoMedium;
+		$this->photoSmall        = $photoSmall;
+		$this->batch             = $batch;
+		$this->notify            = $notify;
+		$this->poll              = $poll;
+		$this->subscribe         = $subscribe;
+		$this->searchable        = $searchable;
+		$this->pubKey            = $pubKey;
+		$this->baseurl           = $baseurl;
+		$this->gsid              = $gsid;
+		$this->created           = $created;
+		$this->updated           = $updated;
+		$this->interacting_count = $interacting_count;
+		$this->interacted_count  = $interacted_count;
+		$this->post_count        = $post_count;
+	}
+}
diff --git a/src/Protocol/Diaspora/Factory/DiasporaContact.php b/src/Protocol/Diaspora/Factory/DiasporaContact.php
new file mode 100644
index 000000000..d5c91d200
--- /dev/null
+++ b/src/Protocol/Diaspora/Factory/DiasporaContact.php
@@ -0,0 +1,102 @@
+<?php
+/**
+ * @copyright Copyright (C) 2010-2022, the Friendica project
+ *
+ * @license GNU AGPL version 3 or any later version
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ *
+ */
+
+namespace Friendica\Protocol\Diaspora\Factory;
+
+use Friendica\Capabilities\ICanCreateFromTableRow;
+use Friendica\Database\DBA;
+use GuzzleHttp\Psr7\Uri;
+
+class DiasporaContact extends \Friendica\BaseFactory implements ICanCreateFromTableRow
+{
+	public function createFromTableRow(array $row): \Friendica\Protocol\Diaspora\Entity\DiasporaContact
+	{
+		return new \Friendica\Protocol\Diaspora\Entity\DiasporaContact(
+			new Uri($row['url']),
+			new \DateTime($row['created'], new \DateTimeZone('UTC')),
+			$row['guid'],
+			$row['addr'],
+			$row['alias'] ? new Uri($row['alias']) : null,
+			$row['nick'],
+			$row['name'],
+			$row['given-name'],
+			$row['family-name'],
+			$row['photo'] ? new Uri($row['photo']) : null,
+			$row['photo-medium'] ? new Uri($row['photo-medium']) : null,
+			$row['photo-small'] ? new Uri($row['photo-small']) : null,
+			$row['batch'] ? new Uri($row['batch']) : null,
+			$row['notify'] ? new Uri($row['notify']) : null,
+			$row['poll'] ? new Uri($row['poll']) : null,
+			$row['subscribe'] ? new Uri($row['subscribe']) : null,
+			$row['searchable'],
+			$row['pubkey'],
+			$row['baseurl'] ? new Uri($row['baseurl']) : null,
+			$row['gsid'],
+			$row['updated'] !== DBA::NULL_DATETIME ? new \DateTime($row['updated'], new \DateTimeZone('UTC')) : null,
+			$row['interacting_count'],
+			$row['interacted_count'],
+			$row['post_count'],
+			$row['uri-id'],
+		);
+	}
+
+	/**
+	 * @param array     $data              Data returned by \Friendica\Network\Probe::uri()
+	 * @param int       $uriId             The URI ID of the Diaspora contact URL + GUID
+	 * @param \DateTime $created
+	 * @param int       $interacting_count
+	 * @param int       $interacted_count
+	 * @param int       $post_count
+	 * @return \Friendica\Protocol\Diaspora\Entity\DiasporaContact
+	 */
+	public function createfromProbeData(array $data, int $uriId, \DateTime $created, int $interacting_count = 0, int $interacted_count = 0, int $post_count = 0): \Friendica\Protocol\Diaspora\Entity\DiasporaContact
+	{
+		$alias = $data['alias'] != $data['url'] ? $data['alias'] : null;
+
+		return new \Friendica\Protocol\Diaspora\Entity\DiasporaContact(
+			new Uri($data['url']),
+			$created,
+			$data['guid'],
+			$data['addr'],
+			$alias ? new Uri($alias) : null,
+			$data['nick'],
+			$data['name'],
+			$data['given-name'] ?? '',
+			$data['family-name'] ?? '',
+			$data['photo'] ? new Uri($data['photo']) : null,
+			!empty($data['photo_medium']) ? new Uri($data['photo_medium']) : null,
+			!empty($data['photo_small']) ? new Uri($data['photo_small']) : null,
+			$data['batch'] ? new Uri($data['batch']) : null,
+			$data['notify'] ? new Uri($data['notify']) : null,
+			$data['poll'] ? new Uri($data['poll']) : null,
+			$data['subscribe'] ? new Uri($data['subscribe']) : null,
+			!$data['hide'],
+			$data['pubkey'],
+			$data['baseurl'] ? new Uri($data['baseurl']) : null,
+			$data['gsid'],
+			null,
+			$interacting_count,
+			$interacted_count,
+			$post_count,
+			$uriId,
+		);
+	}
+}
diff --git a/src/Protocol/Diaspora/Repository/DiasporaContact.php b/src/Protocol/Diaspora/Repository/DiasporaContact.php
new file mode 100644
index 000000000..ac8d200aa
--- /dev/null
+++ b/src/Protocol/Diaspora/Repository/DiasporaContact.php
@@ -0,0 +1,283 @@
+<?php
+/**
+ * @copyright Copyright (C) 2010-2022, the Friendica project
+ *
+ * @license GNU AGPL version 3 or any later version
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ *
+ */
+
+namespace Friendica\Protocol\Diaspora\Repository;
+
+use Friendica\BaseRepository;
+use Friendica\Core\System;
+use Friendica\Database\Database;
+use Friendica\Database\Definition\DbaDefinition;
+use Friendica\Model\APContact;
+use Friendica\Model\Contact;
+use Friendica\Model\Item;
+use Friendica\Model\ItemURI;
+use Friendica\Network\HTTPException;
+use Friendica\Protocol\Diaspora\Entity;
+use Friendica\Protocol\Diaspora\Factory;
+use Friendica\Protocol\WebFingerUri;
+use Friendica\Util\DateTimeFormat;
+use Psr\Http\Message\UriInterface;
+use Psr\Log\LoggerInterface;
+
+class DiasporaContact extends BaseRepository
+{
+	const ALWAYS_UPDATE                 = true;
+	const NEVER_UPDATE                  = false;
+	const UPDATE_IF_MISSING_OR_OUTDATED = null;
+
+	protected static $table_name = 'diaspora-contact-view';
+
+	/** @var Factory\DiasporaContact */
+	protected $factory;
+	/** @var DbaDefinition */
+	private $definition;
+
+	public function __construct(DbaDefinition $definition, Database $database, LoggerInterface $logger, Factory\DiasporaContact $factory)
+	{
+		parent::__construct($database, $logger, $factory);
+
+		$this->definition = $definition;
+	}
+
+	/**
+	 * @param array $condition
+	 * @param array $params
+	 * @return Entity\DiasporaContact
+	 * @throws HTTPException\NotFoundException
+	 */
+	public function selectOne(array $condition, array $params = []): Entity\DiasporaContact
+	{
+		return parent::_selectOne($condition, $params);
+	}
+
+	/**
+	 * @param int $uriId
+	 * @return Entity\DiasporaContact
+	 * @throws HTTPException\NotFoundException
+	 */
+	public function selectOneByUriId(int $uriId): Entity\DiasporaContact
+	{
+		return $this->selectOne(['uri-id' => $uriId]);
+	}
+
+	/**
+	 * @param UriInterface $uri
+	 * @return Entity\DiasporaContact
+	 * @throws HTTPException\NotFoundException
+	 */
+	public function selectOneByUri(UriInterface $uri): Entity\DiasporaContact
+	{
+		try {
+			return $this->selectOne(['url' => (string) $uri]);
+		} catch (HTTPException\NotFoundException $e) {
+		}
+
+		try {
+			return $this->selectOne(['addr' => (string) $uri]);
+		} catch (HTTPException\NotFoundException $e) {
+		}
+
+		return $this->selectOne(['alias' => (string) $uri]);
+	}
+
+	/**
+	 * @param WebFingerUri $uri
+	 * @return Entity\DiasporaContact
+	 * @throws HTTPException\NotFoundException
+	 */
+	public function selectOneByAddr(WebFingerUri $uri): Entity\DiasporaContact
+	{
+		return $this->selectOne(['addr' => $uri->getAddr()]);
+	}
+
+	/**
+	 * @param int $uriId
+	 * @return bool
+	 * @throws \Exception
+	 */
+	public function existsByUriId(int $uriId): bool
+	{
+		return $this->db->exists(self::$table_name, ['uri-id' => $uriId]);
+	}
+
+	public function save(Entity\DiasporaContact $DiasporaContact): Entity\DiasporaContact
+	{
+		$uriId = $DiasporaContact->uriId ?? ItemURI::insert(['uri' => $DiasporaContact->url, 'guid' => $DiasporaContact->guid]);
+
+		$fields = [
+			'uri-id'            => $uriId,
+			'addr'              => $DiasporaContact->addr,
+			'alias'             => (string)$DiasporaContact->alias,
+			'nick'              => $DiasporaContact->nick,
+			'name'              => $DiasporaContact->name,
+			'given-name'        => $DiasporaContact->givenName,
+			'family-name'       => $DiasporaContact->familyName,
+			'photo'             => (string)$DiasporaContact->photo,
+			'photo-medium'      => (string)$DiasporaContact->photoMedium,
+			'photo-small'       => (string)$DiasporaContact->photoSmall,
+			'batch'             => (string)$DiasporaContact->batch,
+			'notify'            => (string)$DiasporaContact->notify,
+			'poll'              => (string)$DiasporaContact->poll,
+			'subscribe'         => (string)$DiasporaContact->subscribe,
+			'searchable'        => $DiasporaContact->searchable,
+			'pubkey'            => $DiasporaContact->pubKey,
+			'gsid'              => $DiasporaContact->gsid,
+			'created'           => $DiasporaContact->created->format(DateTimeFormat::MYSQL),
+			'updated'           => DateTimeFormat::utcNow(),
+			'interacting_count' => $DiasporaContact->interacting_count,
+			'interacted_count'  => $DiasporaContact->interacted_count,
+			'post_count'        => $DiasporaContact->post_count,
+		];
+
+		// Limit the length on incoming fields
+		$fields = $this->definition->truncateFieldsForTable('diaspora-contact', $fields);
+
+		$this->db->insert('diaspora-contact', $fields, Database::INSERT_UPDATE);
+
+		return $this->selectOneByUriId($uriId);
+	}
+
+	/**
+	 * Fetch a Diaspora profile from a given WebFinger address and updates it depending on the mode
+	 *
+	 * @param WebFingerUri $uri    Profile address
+	 * @param boolean      $update true = always update, false = never update, null = update when not found or outdated
+	 * @return Entity\DiasporaContact
+	 * @throws HTTPException\NotFoundException
+	 */
+	public function getByAddr(WebFingerUri $uri, ?bool $update = self::UPDATE_IF_MISSING_OR_OUTDATED): Entity\DiasporaContact
+	{
+		if ($update !== self::ALWAYS_UPDATE) {
+			try {
+				$dcontact = $this->selectOneByAddr($uri);
+				if ($update === self::NEVER_UPDATE) {
+					return $dcontact;
+				}
+			} catch (HTTPException\NotFoundException $e) {
+				if ($update === self::NEVER_UPDATE) {
+					throw $e;
+				}
+
+				// This is necessary for Contact::getByURL in case the base contact record doesn't need probing,
+				// but we still need the result of a probe to create the missing diaspora-contact record.
+				$update = self::ALWAYS_UPDATE;
+			}
+		}
+
+		$contact = Contact::getByURL($uri, $update, ['uri-id']);
+		if (empty($contact['uri-id'])) {
+			throw new HTTPException\NotFoundException('Diaspora profile with URI ' . $uri . ' not found');
+		}
+
+		return self::selectOneByUriId($contact['uri-id']);
+	}
+
+	/**
+	 * Fetch a Diaspora profile from a given profile URL and updates it depending on the mode
+	 *
+	 * @param UriInterface $uri    Profile URL
+	 * @param boolean      $update true = always update, false = never update, null = update when not found or outdated
+	 * @return Entity\DiasporaContact
+	 * @throws HTTPException\NotFoundException
+	 */
+	public function getByUrl(UriInterface $uri, ?bool $update = self::UPDATE_IF_MISSING_OR_OUTDATED): Entity\DiasporaContact
+	{
+		if ($update !== self::ALWAYS_UPDATE) {
+			try {
+				$dcontact = $this->selectOneByUriId(ItemURI::getIdByURI($uri));
+				if ($update === self::NEVER_UPDATE) {
+					return $dcontact;
+				}
+			} catch (HTTPException\NotFoundException $e) {
+				if ($update === self::NEVER_UPDATE) {
+					throw $e;
+				}
+
+				// This is necessary for Contact::getByURL in case the base contact record doesn't need probing,
+				// but we still need the result of a probe to create the missing diaspora-contact record.
+				$update = self::ALWAYS_UPDATE;
+			}
+		}
+
+		$contact = Contact::getByURL($uri, $update, ['uri-id']);
+		if (empty($contact['uri-id'])) {
+			throw new HTTPException\NotFoundException('Diaspora profile with URI ' . $uri . ' not found');
+		}
+
+		return self::selectOneByUriId($contact['uri-id']);
+	}
+
+	/**
+	 * Update or create a diaspora-contact entry via a probe array
+	 *
+	 * @param array $data Probe array
+	 * @return Entity\DiasporaContact
+	 * @throws \Exception
+	 */
+	public function updateFromProbeArray(array $data): Entity\DiasporaContact
+	{
+		$uriId = ItemURI::insert(['uri' => $data['url'], 'guid' => $data['guid']]);
+
+		$contact   = Contact::getByUriId($uriId, ['id', 'created']);
+		$apcontact = APContact::getByURL($data['url'], false);
+		if (!empty($apcontact)) {
+			$interacting_count = $apcontact['followers_count'];
+			$interacted_count  = $apcontact['following_count'];
+			$post_count        = $apcontact['statuses_count'];
+		} elseif (!empty($contact['id'])) {
+			$last_interaction = DateTimeFormat::utc('now - 180 days');
+
+			$interacting_count = $this->db->count('contact-relation', ["`relation-cid` = ? AND NOT `follows` AND `last-interaction` > ?", $contact['id'], $last_interaction]);
+			$interacted_count  = $this->db->count('contact-relation', ["`cid` = ? AND NOT `follows` AND `last-interaction` > ?", $contact['id'], $last_interaction]);
+			$post_count        = $this->db->count('post', ['author-id' => $contact['id'], 'gravity' => [Item::GRAVITY_PARENT, Item::GRAVITY_COMMENT]]);
+		}
+
+		$DiasporaContact = $this->factory->createfromProbeData(
+			$data,
+			$uriId,
+			new \DateTime($contact['created'] ?? 'now', new \DateTimeZone('UTC')),
+			$interacting_count ?? 0,
+			$interacted_count ?? 0,
+			$post_count ?? 0
+		);
+
+		$DiasporaContact = $this->save($DiasporaContact);
+
+		$this->logger->info('Updated diaspora-contact', ['url' => (string) $DiasporaContact->url, 'callstack' => System::callstack(20)]);
+
+		return $DiasporaContact;
+	}
+
+	/**
+	 * get a url (scheme://domain.tld/u/user) from a given contact guid
+	 *
+	 * @param mixed $guid Hexadecimal string guid
+	 *
+	 * @return string the contact url or null
+	 * @throws \Exception
+	 */
+	public function getUrlByGuid(string $guid): ?string
+	{
+		$diasporaContact = $this->db->selectFirst(self::$table_name, ['url'], ['guid' => $guid]);
+
+		return $diasporaContact['url'] ?? null;
+	}
+}
diff --git a/src/Protocol/WebFingerUri.php b/src/Protocol/WebFingerUri.php
new file mode 100644
index 000000000..b9959f2db
--- /dev/null
+++ b/src/Protocol/WebFingerUri.php
@@ -0,0 +1,113 @@
+<?php
+/**
+ * @copyright Copyright (C) 2010-2022, the Friendica project
+ *
+ * @license GNU AGPL version 3 or any later version
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ *
+ */
+
+namespace Friendica\Protocol;
+
+use GuzzleHttp\Psr7\Uri;
+
+class WebFingerUri
+{
+	/**
+	 * @var string
+	 */
+	private $user;
+	/**
+	 * @var string
+	 */
+	private $host;
+	/**
+	 * @var int|null
+	 */
+	private $port;
+	/**
+	 * @var string|null
+	 */
+	private $path;
+
+	private function __construct(string $user, string $host, int $port = null, string $path = null)
+	{
+		$this->user = $user;
+		$this->host = $host;
+		$this->port = $port;
+		$this->path = $path;
+
+		$this->validate();
+	}
+
+	/**
+	 * @param string $addr
+	 * @return WebFingerUri
+	 */
+	public static function fromString(string $addr): WebFingerUri
+	{
+		$uri = new Uri('acct://' . preg_replace('/^acct:/', '', $addr));
+
+		return new self($uri->getUserInfo(), $uri->getHost(), $uri->getPort(), $uri->getPath());
+	}
+
+	private function validate()
+	{
+		if (!$this->user) {
+			throw new \InvalidArgumentException('WebFinger URI User part is required');
+		}
+
+		if (!$this->host) {
+			throw new \InvalidArgumentException('WebFinger URI Host part is required');
+		}
+	}
+
+	public function getUser(): string
+	{
+		return $this->user;
+	}
+
+	public function getHost(): string
+	{
+		return $this->host;
+	}
+
+	public function getFullHost(): string
+	{
+		return $this->host
+			. ($this->port ? ':' . $this->port : '') .
+			($this->path ?: '');
+	}
+
+	public function getLongForm(): string
+	{
+		return 'acct:' . $this->getShortForm();
+	}
+
+	public function getShortForm(): string
+	{
+		return $this->user . '@' . $this->getFullHost();
+	}
+
+	public function getAddr(): string
+	{
+		return $this->getShortForm();
+	}
+
+	public function __toString(): string
+	{
+		return $this->getShortForm();
+	}
+}
diff --git a/src/Worker/Delivery.php b/src/Worker/Delivery.php
index 706adb401..cec894480 100644
--- a/src/Worker/Delivery.php
+++ b/src/Worker/Delivery.php
@@ -29,7 +29,6 @@ use Friendica\Core\Worker;
 use Friendica\Database\DBA;
 use Friendica\DI;
 use Friendica\Model\Contact;
-use Friendica\Model\FContact;
 use Friendica\Model\GServer;
 use Friendica\Model\Item;
 use Friendica\Model\Post;
@@ -94,7 +93,7 @@ class Delivery
 				if ($item['verb'] == Activity::ANNOUNCE) {
 					continue;
 				}
-	
+
 				if ($item['id'] == $parent_id) {
 					$parent = $item;
 				}
@@ -278,7 +277,7 @@ class Delivery
 	private static function deliverDFRN(string $cmd, array $contact, array $owner, array $items, array $target_item, bool $public_message, bool $top_level, bool $followup, int $server_protocol = null)
 	{
 		// Transmit Diaspora reshares via Diaspora if the Friendica contact support Diaspora
-		if (Diaspora::getReshareDetails($target_item ?? []) && !empty(FContact::getByURL($contact['addr'], false))) {
+		if (Diaspora::getReshareDetails($target_item ?? []) && Diaspora::isSupportedByContactUrl($contact['addr'], false)) {
 			Logger::info('Reshare will be transmitted via Diaspora', ['url' => $contact['url'], 'guid' => ($target_item['guid'] ?? '') ?: $target_item['id']]);
 			self::deliverDiaspora($cmd, $contact, $owner, $items, $target_item, $public_message, $top_level, $followup);
 			return;
diff --git a/src/Worker/ExpirePosts.php b/src/Worker/ExpirePosts.php
index 6f75d1855..a2ef33f33 100644
--- a/src/Worker/ExpirePosts.php
+++ b/src/Worker/ExpirePosts.php
@@ -189,7 +189,7 @@ class ExpirePosts
 			AND NOT EXISTS(SELECT `uri-id` FROM `user-contact` WHERE `uri-id` = `item-uri`.`id`)
 			AND NOT EXISTS(SELECT `uri-id` FROM `contact` WHERE `uri-id` = `item-uri`.`id`)
 			AND NOT EXISTS(SELECT `uri-id` FROM `apcontact` WHERE `uri-id` = `item-uri`.`id`)
-			AND NOT EXISTS(SELECT `uri-id` FROM `fcontact` WHERE `uri-id` = `item-uri`.`id`)
+			AND NOT EXISTS(SELECT `uri-id` FROM `diaspora-contact` WHERE `uri-id` = `item-uri`.`id`)
 			AND NOT EXISTS(SELECT `uri-id` FROM `inbox-status` WHERE `uri-id` = `item-uri`.`id`)
 			AND NOT EXISTS(SELECT `uri-id` FROM `post-delivery` WHERE `uri-id` = `item-uri`.`id`)
 			AND NOT EXISTS(SELECT `uri-id` FROM `post-delivery` WHERE `inbox-id` = `item-uri`.`id`)
diff --git a/src/Worker/UpdateFContact.php b/src/Worker/UpdateFContact.php
deleted file mode 100644
index 260e07171..000000000
--- a/src/Worker/UpdateFContact.php
+++ /dev/null
@@ -1,41 +0,0 @@
-<?php
-/**
- * @copyright Copyright (C) 2010-2022, the Friendica project
- *
- * @license GNU AGPL version 3 or any later version
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU Affero General Public License as
- * published by the Free Software Foundation, either version 3 of the
- * License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU Affero General Public License for more details.
- *
- * You should have received a copy of the GNU Affero General Public License
- * along with this program.  If not, see <https://www.gnu.org/licenses/>.
- *
- */
-
-namespace Friendica\Worker;
-
-use Friendica\Core\Logger;
-use Friendica\Model\FContact;
-
-class UpdateFContact
-{
-	/**
-	 * Update fcontact data via probe
-	 *
-	 * @param string $handle Contact handle
-	 * @return void
-	 */
-	public static function execute(string $handle)
-	{
-		$success = FContact::getByURL($handle, true);
-
-		Logger::info('Updated from probe', ['handle' => $handle, 'success' => $success]);
-	}
-}
diff --git a/static/dbstructure.config.php b/static/dbstructure.config.php
index f8e01e51e..d5bbed666 100644
--- a/static/dbstructure.config.php
+++ b/static/dbstructure.config.php
@@ -55,7 +55,7 @@
 use Friendica\Database\DBA;
 
 if (!defined('DB_UPDATE_VERSION')) {
-	define('DB_UPDATE_VERSION', 1497);
+	define('DB_UPDATE_VERSION', 1500);
 }
 
 return [
@@ -637,6 +637,39 @@ return [
 			"wid" => ["wid"],
 		]
 	],
+	"diaspora-contact" => [
+		"comment" => "Diaspora compatible contacts - used in the Diaspora implementation",
+		"fields" => [
+			"uri-id" => ["type" => "int unsigned", "not null" => "1", "primary" => "1", "foreign" => ["item-uri" => "id"], "comment" => "Id of the item-uri table entry that contains the contact URL"],
+			"addr" => ["type" => "varchar(255)", "comment" => ""],
+			"alias" => ["type" => "varchar(255)", "comment" => ""],
+			"nick" => ["type" => "varchar(255)", "comment" => ""],
+			"name" => ["type" => "varchar(255)", "comment" => ""],
+			"given-name" => ["type" => "varchar(255)", "comment" => ""],
+			"family-name" => ["type" => "varchar(255)", "comment" => ""],
+			"photo" => ["type" => "varchar(255)", "comment" => ""],
+			"photo-medium" => ["type" => "varchar(255)", "comment" => ""],
+			"photo-small" => ["type" => "varchar(255)", "comment" => ""],
+			"batch" => ["type" => "varchar(255)", "comment" => ""],
+			"notify" => ["type" => "varchar(255)", "comment" => ""],
+			"poll" => ["type" => "varchar(255)", "comment" => ""],
+			"subscribe" => ["type" => "varchar(255)", "comment" => ""],
+			"searchable" => ["type" => "boolean", "comment" => ""],
+			"pubkey" => ["type" => "text", "comment" => ""],
+			"gsid" => ["type" => "int unsigned", "foreign" => ["gserver" => "id", "on delete" => "restrict"], "comment" => "Global Server ID"],
+			"created" => ["type" => "datetime", "not null" => "1", "default" => DBA::NULL_DATETIME, "comment" => ""],
+			"updated" => ["type" => "datetime", "not null" => "1", "default" => DBA::NULL_DATETIME, "comment" => ""],
+			"interacting_count" => ["type" => "int unsigned", "default" => 0, "comment" => "Number of contacts this contact interactes with"],
+			"interacted_count" => ["type" => "int unsigned", "default" => 0, "comment" => "Number of contacts that interacted with this contact"],
+			"post_count" => ["type" => "int unsigned", "default" => 0, "comment" => "Number of posts and comments"],
+		],
+		"indexes" => [
+			"PRIMARY" => ["uri-id"],
+			"addr" => ["UNIQUE", "addr"],
+			"alias" => ["alias"],
+			"gsid" => ["gsid"],
+		]
+	],
 	"diaspora-interaction" => [
 		"comment" => "Signed Diaspora Interaction",
 		"fields" => [
@@ -690,39 +723,6 @@ return [
 			"uri-id" => ["uri-id"],
 		]
 	],
-	"fcontact" => [
-		"comment" => "Diaspora compatible contacts - used in the Diaspora implementation",
-		"fields" => [
-			"id" => ["type" => "int unsigned", "not null" => "1", "extra" => "auto_increment", "primary" => "1", "comment" => "sequential ID"],
-			"guid" => ["type" => "varbinary(255)", "not null" => "1", "default" => "", "comment" => "unique id"],
-			"url" => ["type" => "varbinary(383)", "not null" => "1", "default" => "", "comment" => ""],
-			"uri-id" => ["type" => "int unsigned", "foreign" => ["item-uri" => "id"], "comment" => "Id of the item-uri table entry that contains the fcontact url"],
-			"name" => ["type" => "varchar(255)", "not null" => "1", "default" => "", "comment" => ""],
-			"photo" => ["type" => "varbinary(383)", "not null" => "1", "default" => "", "comment" => ""],
-			"request" => ["type" => "varbinary(383)", "not null" => "1", "default" => "", "comment" => ""],
-			"nick" => ["type" => "varchar(255)", "not null" => "1", "default" => "", "comment" => ""],
-			"addr" => ["type" => "varchar(255)", "not null" => "1", "default" => "", "comment" => ""],
-			"batch" => ["type" => "varbinary(383)", "not null" => "1", "default" => "", "comment" => ""],
-			"notify" => ["type" => "varbinary(383)", "not null" => "1", "default" => "", "comment" => ""],
-			"poll" => ["type" => "varbinary(383)", "not null" => "1", "default" => "", "comment" => ""],
-			"confirm" => ["type" => "varbinary(383)", "not null" => "1", "default" => "", "comment" => ""],
-			"priority" => ["type" => "tinyint unsigned", "not null" => "1", "default" => "0", "comment" => ""],
-			"network" => ["type" => "char(4)", "not null" => "1", "default" => "", "comment" => ""],
-			"alias" => ["type" => "varbinary(383)", "not null" => "1", "default" => "", "comment" => ""],
-			"pubkey" => ["type" => "text", "comment" => ""],
-			"created" => ["type" => "datetime", "not null" => "1", "default" => DBA::NULL_DATETIME, "comment" => ""],
-			"updated" => ["type" => "datetime", "not null" => "1", "default" => DBA::NULL_DATETIME, "comment" => ""],
-			"interacting_count" => ["type" => "int unsigned", "default" => 0, "comment" => "Number of contacts this contact interactes with"],
-			"interacted_count" => ["type" => "int unsigned", "default" => 0, "comment" => "Number of contacts that interacted with this contact"],
-			"post_count" => ["type" => "int unsigned", "default" => 0, "comment" => "Number of posts and comments"],
-		],
-		"indexes" => [
-			"PRIMARY" => ["id"],
-			"addr" => ["addr(32)"],
-			"url" => ["UNIQUE", "url(190)"],
-			"uri-id" => ["UNIQUE", "uri-id"],
-		]
-	],
 	"fetch-entry" => [
 		"comment" => "",
 		"fields" => [
@@ -870,7 +870,7 @@ return [
 		"fields" => [
 			"id" => ["type" => "int unsigned", "not null" => "1", "extra" => "auto_increment", "primary" => "1", "comment" => "sequential ID"],
 			"uid" => ["type" => "mediumint unsigned", "not null" => "1", "default" => "0", "foreign" => ["user" => "uid"], "comment" => "User id"],
-			"fid" => ["type" => "int unsigned", "relation" => ["fcontact" => "id"], "comment" => "deprecated"],
+			"fid" => ["type" => "int unsigned", "comment" => "deprecated"],
 			"contact-id" => ["type" => "int unsigned", "not null" => "1", "default" => "0", "foreign" => ["contact" => "id"], "comment" => ""],
 			"suggest-cid" => ["type" => "int unsigned", "foreign" => ["contact" => "id"], "comment" => "Suggested contact"],
 			"knowyou" => ["type" => "boolean", "not null" => "1", "default" => "0", "comment" => ""],
diff --git a/static/dbview.config.php b/static/dbview.config.php
index 66f3de3b6..c82e7dc77 100644
--- a/static/dbview.config.php
+++ b/static/dbview.config.php
@@ -155,7 +155,6 @@
 			"author-hidden" => ["author", "hidden"],
 			"author-updated" => ["author", "updated"],
 			"author-gsid" => ["author", "gsid"],
-			"author-uri-id" => ["author", "uri-id"],
 			"owner-id" => ["post-user", "owner-id"],
 			"owner-uri-id" => ["owner", "uri-id"],
 			"owner-link" => ["owner", "url"],
@@ -332,7 +331,6 @@
 			"author-hidden" => ["author", "hidden"],
 			"author-updated" => ["author", "updated"],
 			"author-gsid" => ["author", "gsid"],
-			"author-uri-id" => ["author", "uri-id"],
 			"owner-id" => ["post-thread-user", "owner-id"],
 			"owner-uri-id" => ["owner", "uri-id"],
 			"owner-link" => ["owner", "url"],
@@ -495,7 +493,6 @@
 			"author-hidden" => ["author", "hidden"],
 			"author-updated" => ["author", "updated"],
 			"author-gsid" => ["author", "gsid"],
-			"author-uri-id" => ["author", "uri-id"],
 			"owner-id" => ["post", "owner-id"],
 			"owner-uri-id" => ["owner", "uri-id"],
 			"owner-link" => ["owner", "url"],
@@ -634,7 +631,6 @@
 			"author-hidden" => ["author", "hidden"],
 			"author-updated" => ["author", "updated"],
 			"author-gsid" => ["author", "gsid"],
-			"author-uri-id" => ["author", "uri-id"],
 			"owner-id" => ["post-thread", "owner-id"],
 			"owner-uri-id" => ["owner", "uri-id"],
 			"owner-link" => ["owner", "url"],
@@ -994,11 +990,11 @@
 			"blocked" => ["contact", "blocked"],
 			"dfrn-notify" => ["contact", "notify"],
 			"dfrn-poll" => ["contact", "poll"],
-			"diaspora-guid" => ["fcontact", "guid"],
-			"diaspora-batch" => ["fcontact", "batch"],
-			"diaspora-notify" => ["fcontact", "notify"],
-			"diaspora-poll" => ["fcontact", "poll"],
-			"diaspora-alias" => ["fcontact", "alias"],
+			"diaspora-guid" => ["item-uri", "guid"],
+			"diaspora-batch" => ["diaspora-contact", "batch"],
+			"diaspora-notify" => ["diaspora-contact", "notify"],
+			"diaspora-poll" => ["diaspora-contact", "poll"],
+			"diaspora-alias" => ["diaspora-contact", "alias"],
 			"ap-uuid" => ["apcontact", "uuid"],
 			"ap-type" => ["apcontact", "type"],
 			"ap-following" => ["apcontact", "following"],
@@ -1017,9 +1013,9 @@
 		"query" => "FROM `contact`
 			LEFT JOIN `item-uri` ON `item-uri`.`id` = `contact`.`uri-id`
 			LEFT JOIN `apcontact` ON `apcontact`.`uri-id` = `contact`.`uri-id`
-			LEFT JOIN `fcontact` ON `fcontact`.`uri-id` = contact.`uri-id`
+			LEFT JOIN `diaspora-contact` ON `diaspora-contact`.`uri-id` = contact.`uri-id`
 			LEFT JOIN `gserver` ON `gserver`.`id` = contact.`gsid`
-			WHERE `contact`.`uid` = 0"			
+			WHERE `contact`.`uid` = 0"
 	],
 	"account-user-view" => [
 		"fields" => [
@@ -1093,14 +1089,14 @@
 			"reason" => ["ucontact", "reason"],
 			"dfrn-notify" => ["contact", "notify"],
 			"dfrn-poll" => ["contact", "poll"],
-			"diaspora-guid" => ["fcontact", "guid"],
-			"diaspora-batch" => ["fcontact", "batch"],
-			"diaspora-notify" => ["fcontact", "notify"],
-			"diaspora-poll" => ["fcontact", "poll"],
-			"diaspora-alias" => ["fcontact", "alias"],
-			"diaspora-interacting_count" => ["fcontact", "interacting_count"],
-			"diaspora-interacted_count" => ["fcontact", "interacted_count"],
-			"diaspora-post_count" => ["fcontact", "post_count"],
+			"diaspora-guid" => ["item-uri", "guid"],
+			"diaspora-batch" => ["diaspora-contact", "batch"],
+			"diaspora-notify" => ["diaspora-contact", "notify"],
+			"diaspora-poll" => ["diaspora-contact", "poll"],
+			"diaspora-alias" => ["diaspora-contact", "alias"],
+			"diaspora-interacting_count" => ["diaspora-contact", "interacting_count"],
+			"diaspora-interacted_count" => ["diaspora-contact", "interacted_count"],
+			"diaspora-post_count" => ["diaspora-contact", "post_count"],
 			"ap-uuid" => ["apcontact", "uuid"],
 			"ap-type" => ["apcontact", "type"],
 			"ap-following" => ["apcontact", "following"],
@@ -1120,7 +1116,7 @@
 			INNER JOIN `contact` ON `contact`.`uri-id` = `ucontact`.`uri-id` AND `contact`.`uid` = 0
 			LEFT JOIN `item-uri` ON `item-uri`.`id` = `ucontact`.`uri-id`
 			LEFT JOIN `apcontact` ON `apcontact`.`uri-id` = `ucontact`.`uri-id`
-			LEFT JOIN `fcontact` ON `fcontact`.`uri-id` = `ucontact`.`uri-id` AND `fcontact`.`network` = 'dspr'
+			LEFT JOIN `diaspora-contact` ON `diaspora-contact`.`uri-id` = `ucontact`.`uri-id`
 			LEFT JOIN `gserver` ON `gserver`.`id` = contact.`gsid`"
 	],
 	"pending-view" => [
@@ -1190,5 +1186,36 @@
 		"query" => "FROM `profile_field`
 			INNER JOIN `permissionset` ON `permissionset`.`id` = `profile_field`.`psid`"
 	],
+	"diaspora-contact-view" => [
+		"fields" => [
+			"uri-id" => ["diaspora-contact", "uri-id"],
+			"url" => ["item-uri", "uri"],
+			"guid" => ["item-uri", "guid"],
+			"addr" => ["diaspora-contact", "addr"],
+			"alias" => ["diaspora-contact", "alias"],
+			"nick" => ["diaspora-contact", "nick"],
+			"name" => ["diaspora-contact", "name"],
+			"given-name" => ["diaspora-contact", "given-name"],
+			"family-name" => ["diaspora-contact", "family-name"],
+			"photo" => ["diaspora-contact", "photo"],
+			"photo-medium" => ["diaspora-contact", "photo-medium"],
+			"photo-small" => ["diaspora-contact", "photo-small"],
+			"batch" => ["diaspora-contact", "batch"],
+			"notify" => ["diaspora-contact", "notify"],
+			"poll" => ["diaspora-contact", "poll"],
+			"subscribe" => ["diaspora-contact", "subscribe"],
+			"searchable" => ["diaspora-contact", "searchable"],
+			"pubkey" => ["diaspora-contact", "pubkey"],
+			"baseurl" => ["gserver", "url"],
+			"gsid" => ["diaspora-contact", "gsid"],
+			"created" => ["diaspora-contact", "created"],
+			"updated" => ["diaspora-contact", "updated"],
+			"interacting_count" => ["diaspora-contact", "interacting_count"],
+			"interacted_count" => ["diaspora-contact", "interacted_count"],
+			"post_count" => ["diaspora-contact", "post_count"],
+		],
+		"query" => "FROM `diaspora-contact`
+			INNER JOIN `item-uri` ON `item-uri`.`id` = `diaspora-contact`.`uri-id`
+			LEFT JOIN `gserver` ON `gserver`.`id` = `diaspora-contact`.`gsid`"
+	],
 ];
-
diff --git a/tests/src/Protocol/WebFingerUriTest.php b/tests/src/Protocol/WebFingerUriTest.php
new file mode 100644
index 000000000..7378040d2
--- /dev/null
+++ b/tests/src/Protocol/WebFingerUriTest.php
@@ -0,0 +1,135 @@
+<?php
+/**
+ * @copyright Copyright (C) 2010-2022, the Friendica project
+ *
+ * @license GNU AGPL version 3 or any later version
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ *
+ * Main database structure configuration file.
+ *
+ * Here are described all the tables, fields and indexes Friendica needs to work.
+ * The entry order is mostly alphabetic - with the exception of tables that are used in foreign keys.
+ *
+ * Syntax (braces indicate optionale values):
+ * "<table name>" => [
+ *    "comment" => "Description of the table",
+ *    "fields" => [
+ *        "<field name>" => [
+ *            "type" => "<field type>{(<field size>)} <unsigned>",
+ *            "not null" => 0|1,
+ *            {"extra" => "auto_increment",}
+ *            {"default" => "<default value>",}
+ *            {"default" => NULL_DATE,} (for datetime fields)
+ *            {"primary" => "1",}
+ *            {"foreign|relation" => ["<foreign key table name>" => "<foreign key field name>"],}
+ *            "comment" => "Description of the fields"
+ *        ],
+ *        ...
+ *    ],
+ *    "indexes" => [
+ *        "PRIMARY" => ["<primary key field name>", ...],
+ *        "<index name>" => [{"UNIQUE",} "<field name>{(<key size>)}", ...]
+ *        ...
+ *    ],
+ * ],
+ *
+ * Whenever possible prefer "foreign" before "relation" with the foreign keys.
+ * "foreign" adds true foreign keys on the database level, while "relation" is just an indicator of a table relation without any consequences
+ *
+ * If you need to make any change, make sure to increment the DB_UPDATE_VERSION constant value below.
+ *
+ */
+
+namespace Friendica\Test\src\Protocol;
+
+use Friendica\Protocol\WebFingerUri;
+use PHPUnit\Framework\TestCase;
+
+class WebFingerUriTest extends TestCase
+{
+	public function dataFromString(): array
+	{
+		return [
+			'long' => [
+				'expectedLong'  => 'acct:selma@www.example.com:8080/friend',
+				'expectedShort' => 'selma@www.example.com:8080/friend',
+				'input'         => 'acct:selma@www.example.com:8080/friend',
+			],
+			'short' => [
+				'expectedLong'  => 'acct:selma@www.example.com:8080/friend',
+				'expectedShort' => 'selma@www.example.com:8080/friend',
+				'input'         => 'selma@www.example.com:8080/friend',
+			],
+			'minimal' => [
+				'expectedLong'  => 'acct:bob@example.com',
+				'expectedShort' => 'bob@example.com',
+				'input'         => 'bob@example.com',
+			],
+			'acct:' => [
+				'expectedLong'  => 'acct:alice@example.acct:90',
+				'expectedShort' => 'alice@example.acct:90',
+				'input'         => 'alice@example.acct:90',
+			],
+		];
+	}
+
+	/**
+	 * @dataProvider dataFromString
+	 * @param string $expectedLong
+	 * @param string $expectedShort
+	 * @param string $input
+	 * @return void
+	 */
+	public function testFromString(string $expectedLong, string $expectedShort, string $input)
+	{
+		$uri = WebFingerUri::fromString($input);
+
+		$this->assertEquals($expectedLong, $uri->getLongForm());
+		$this->assertEquals($expectedShort, $uri->getShortForm());
+	}
+
+	public function dataFromStringFailure()
+	{
+		return [
+			'missing user' => [
+				'input' => 'example.com',
+			],
+			'missing user @' => [
+				'input' => '@example.com',
+			],
+			'missing host' => [
+				'input' => 'alice',
+			],
+			'missing host @' => [
+				'input' => 'alice@',
+			],
+			'missing everything' => [
+				'input' => '',
+			],
+		];
+	}
+
+	/**
+	 * @dataProvider dataFromStringFailure
+	 * @param string $input
+	 * @return void
+	 */
+	public function testFromStringFailure(string $input)
+	{
+		$this->expectException(\InvalidArgumentException::class);
+
+		WebFingerUri::fromString($input);
+	}
+}
diff --git a/update.php b/update.php
index 176747057..12a3fb74e 100644
--- a/update.php
+++ b/update.php
@@ -974,7 +974,7 @@ function update_1429()
 		return Update::FAILED;
 	}
 
-	if (!DBA::e("UPDATE `fcontact` SET `uri-id` = null WHERE NOT `uri-id` IS NULL")) {
+	if (DBStructure::existsTable('fcontact') && !DBA::e("UPDATE `fcontact` SET `uri-id` = null WHERE NOT `uri-id` IS NULL")) {
 		return Update::FAILED;
 	}
 
@@ -1013,6 +1013,10 @@ function update_1438()
 
 function update_1439()
 {
+	if (!DBStructure::existsTable('fcontact')) {
+		return Update::SUCCESS;
+	}
+
 	$intros = DBA::select('intro', ['id', 'fid'], ["NOT `fid` IS NULL AND `fid` != ?", 0]);
 	while ($intro = DBA::fetch($intros)) {
 		$fcontact = DBA::selectFirst('fcontact', ['url'], ['id' => $intro['fid']]);
@@ -1024,6 +1028,8 @@ function update_1439()
 		}
 	}
 	DBA::close($intros);
+
+	return Update::SUCCESS;
 }
 
 function update_1440()

From 81454547076f242dfe2fc19ab86d659b28405eb2 Mon Sep 17 00:00:00 2001
From: Marek Bachmann <marek.bachmann@comtec.eecs.uni-kassel.de>
Date: Tue, 6 Dec 2022 00:48:28 +0100
Subject: [PATCH 04/21] Revert "Merge branch 'develop' into
 new_image_presentation"

This reverts commit 76f4ba7685dc3c722464d3b5f8be8e1b08fef05a, reversing
changes made to 733543505be2345b1a763b4924413569193773cc.
---
 src/Model/Item.php | 31 ++++++++++++++++++++++++++++---
 1 file changed, 28 insertions(+), 3 deletions(-)

diff --git a/src/Model/Item.php b/src/Model/Item.php
index 152543b91..634dbbd0e 100644
--- a/src/Model/Item.php
+++ b/src/Model/Item.php
@@ -21,6 +21,8 @@
 
 namespace Friendica\Model;
 
+use DOMDocument;
+use DOMXPath;
 use Friendica\Content\Text\BBCode;
 use Friendica\Content\Text\HTML;
 use Friendica\Core\Hook;
@@ -3085,9 +3087,10 @@ class Item
 		];
 		Hook::callAll('prepare_body', $hook_data);
 		// Remove old images
-		$hook_data['html'] = preg_replace('|(<a.*><img.*>.*</a>)|', '', $hook_data['html']);
-		$grid = self::make_image_grid($hook_data);
-		$s = $hook_data['html'] . $grid;
+//		$hook_data['html'] = preg_replace('|(<a.*><img.*>.*</a>)|', '', $hook_data['html']);
+//		$grid = self::make_image_grid($hook_data);
+//		$s = $hook_data['html'] . $grid;
+		$s = $hook_data['html'];
 		unset($hook_data);
 
 		if (!$attach) {
@@ -3131,6 +3134,27 @@ class Item
 		return $hook_data['html'];
 	}
 
+	/**
+	 * This function removes images at the very end of a post based on the assumption that this images are interpreted
+	 * as attachments
+	 * @param array $rendered_html
+	 * @return array
+	 */
+	private function cutAttachedImages(array &$rendered_html) {
+		$doc = new DOMDocument();
+		$doc->loadHTML($rendered_html);
+
+		$xpathsearch = new DOMXPath($doc);
+		$nodes = $xpathsearch->query("*");
+
+		return $nodes;
+	}
+
+	/**
+	 * @param array $data
+	 * @return string|void
+	 * @throws \Friendica\Network\HTTPException\ServiceUnavailableException
+	 */
 	private function make_image_grid(array &$data)
 	{
 		$item = $data['item'];
@@ -3149,6 +3173,7 @@ class Item
 							'preview' => $preview_url,
 							'attachment' => $attachment,
 					]);
+					// @todo add some fany ai to divide images equally on both columns
 					if ($count % 2 == 0) {
 						$img_tags_fc[] = $img_tag;
 					} else {

From 7fb0f018dfb92f05290d454d4ff47771957638d4 Mon Sep 17 00:00:00 2001
From: Marek Bachmann <marek.bachmann@comtec.eecs.uni-kassel.de>
Date: Mon, 5 Dec 2022 03:27:51 +0100
Subject: [PATCH 05/21] First draft for using a image grid to display attached
 images.

---
 src/Model/Item.php                           | 37 ++++++++++++++++-
 view/templates/content/image_grid.tpl        | 14 +++++++
 view/templates/content/image_grid_column.tpl |  1 +
 view/theme/frio/css/image_grid.css           | 43 ++++++++++++++++++++
 4 files changed, 94 insertions(+), 1 deletion(-)
 create mode 100644 view/templates/content/image_grid.tpl
 create mode 100644 view/templates/content/image_grid_column.tpl
 create mode 100644 view/theme/frio/css/image_grid.css

diff --git a/src/Model/Item.php b/src/Model/Item.php
index 8026d567c..1fff0a586 100644
--- a/src/Model/Item.php
+++ b/src/Model/Item.php
@@ -2991,6 +2991,7 @@ class Item
 		$a = DI::app();
 		Hook::callAll('prepare_body_init', $item);
 
+
 		// In order to provide theme developers more possibilities, event items
 		// are treated differently.
 		if ($item['object-type'] === Activity\ObjectType::EVENT && isset($item['event-id'])) {
@@ -3049,6 +3050,7 @@ class Item
 		$item['body'] = self::replaceVisualAttachments($attachments, $item['body'] ?? '');
 
 		$item['body'] = preg_replace("/\s*\[attachment .*?\].*?\[\/attachment\]\s*/ism", "\n", $item['body']);
+
 		self::putInCache($item);
 		$item['body'] = $body;
 		$s = $item["rendered-html"];
@@ -3082,7 +3084,10 @@ class Item
 			'filter_reasons' => $filter_reasons
 		];
 		Hook::callAll('prepare_body', $hook_data);
-		$s = $hook_data['html'];
+		// Remove old images
+		$hook_data['html'] = preg_replace('|(<a.*><img.*>.*</a>)|', '', $hook_data['html']);
+		$grid = self::make_image_grid($hook_data);
+		$s = $hook_data['html'] . $grid;
 		unset($hook_data);
 
 		if (!$attach) {
@@ -3126,6 +3131,36 @@ class Item
 		return $hook_data['html'];
 	}
 
+	private function make_image_grid(array &$data)
+	{
+		$item = $data['item'];
+		if ($item['has-media']) {
+			$attachments = Post\Media::splitAttachments($item['uri-id'], [], $item['has-media'] ?? false);
+			if (count($attachments['visual']) > 1) {
+				$img_tags = array();
+				foreach ($attachments['visual'] as $attachment) {
+					$src_url = Post\Media::getUrlForId($attachment['id']);
+					$preview_url = Post\Media::getPreviewUrlForId($attachment['id'], ($attachment['width'] > $attachment['height']) ? Proxy::SIZE_MEDIUM : Proxy::SIZE_LARGE);
+					$img_tag = array(
+						'$image' => [
+							'src' => $src_url,
+							'preview' => $preview_url,
+							'attachment' => $attachment,
+					]);
+					$img_tags[] = $img_tag;
+				}
+				$img_grid = Renderer::replaceMacros(Renderer::getMarkupTemplate('content/image_grid.tpl'), [
+					'columns' => [
+						'fc' => $img_tags[0],
+						'sc' => $img_tags[1],
+					],
+				]);
+				return $img_grid;
+			}
+		}
+
+	}
+
 	/**
 	 * Check if the body contains a link
 	 *
diff --git a/view/templates/content/image_grid.tpl b/view/templates/content/image_grid.tpl
new file mode 100644
index 000000000..7a06d3372
--- /dev/null
+++ b/view/templates/content/image_grid.tpl
@@ -0,0 +1,14 @@
+<link rel="stylesheet" href="view/theme/frio/css/image_grid.css" type="text/css" media="screen"/>
+
+<div id="row" class="row">
+	<div class="column">
+        {{foreach $columns.fc as $img}}
+        	{{include file="content/image.tpl" image=$img}}
+		{{/foreach}}
+	</div>
+	<div class="column">
+        {{foreach $columns.sc as $img}}
+    	    {{include file="content/image.tpl" image=$img}}
+		{{/foreach}}
+	</div>
+</div>
\ No newline at end of file
diff --git a/view/templates/content/image_grid_column.tpl b/view/templates/content/image_grid_column.tpl
new file mode 100644
index 000000000..6a58a4bda
--- /dev/null
+++ b/view/templates/content/image_grid_column.tpl
@@ -0,0 +1 @@
+<div class="column">{{$images}}</div>
\ No newline at end of file
diff --git a/view/theme/frio/css/image_grid.css b/view/theme/frio/css/image_grid.css
new file mode 100644
index 000000000..dd29dd201
--- /dev/null
+++ b/view/theme/frio/css/image_grid.css
@@ -0,0 +1,43 @@
+* {
+	box-sizing: border-box;
+}
+
+.row {
+	display: -ms-flexbox; /* IE10 */
+	display: flex;
+	-ms-flex-wrap: wrap; /* IE10 */
+	flex-wrap: wrap;
+	padding: 0 4px;
+}
+
+/* Create four equal columns that sits next to each other */
+.column {
+	-ms-flex: 50%; /* IE10 */
+	flex: 50%;
+	max-width: 50%;
+	padding: 0 4px;
+}
+
+.column img {
+	margin-top: 8px;
+	vertical-align: middle;
+	width: 100%;
+}
+
+/*!* Responsive layout - makes a two column-layout instead of four columns *!*/
+/*@media screen and (max-width: 50px) {*/
+/*	.column {*/
+/*		-ms-flex: 50%;*/
+/*		flex: 50%;*/
+/*		max-width: 50%;*/
+/*	}*/
+/*}*/
+
+/* Responsive layout - makes the two columns stack on top of each other instead of next to each other */
+@media screen and (max-width: 150px) {
+	.column {
+		-ms-flex: 100%;
+		flex: 100%;
+		max-width: 100%;
+	}
+}
\ No newline at end of file

From 458f22d303e6afe653a296c377f177ad428e616d Mon Sep 17 00:00:00 2001
From: Marek Bachmann <marek.bachmann@comtec.eecs.uni-kassel.de>
Date: Mon, 5 Dec 2022 04:23:34 +0100
Subject: [PATCH 06/21] Support more than 2 images

---
 src/Model/Item.php                    | 16 ++++++++++++----
 view/templates/content/image_grid.tpl | 12 ++++++++----
 2 files changed, 20 insertions(+), 8 deletions(-)

diff --git a/src/Model/Item.php b/src/Model/Item.php
index 1fff0a586..152543b91 100644
--- a/src/Model/Item.php
+++ b/src/Model/Item.php
@@ -3137,7 +3137,9 @@ class Item
 		if ($item['has-media']) {
 			$attachments = Post\Media::splitAttachments($item['uri-id'], [], $item['has-media'] ?? false);
 			if (count($attachments['visual']) > 1) {
-				$img_tags = array();
+				$img_tags_fc = array();
+				$img_tags_sc = array();
+				$count = 0;
 				foreach ($attachments['visual'] as $attachment) {
 					$src_url = Post\Media::getUrlForId($attachment['id']);
 					$preview_url = Post\Media::getPreviewUrlForId($attachment['id'], ($attachment['width'] > $attachment['height']) ? Proxy::SIZE_MEDIUM : Proxy::SIZE_LARGE);
@@ -3147,12 +3149,18 @@ class Item
 							'preview' => $preview_url,
 							'attachment' => $attachment,
 					]);
-					$img_tags[] = $img_tag;
+					if ($count % 2 == 0) {
+						$img_tags_fc[] = $img_tag;
+					} else {
+						$img_tags_sc[] = $img_tag;
+					}
+					++$count;
 				}
+
 				$img_grid = Renderer::replaceMacros(Renderer::getMarkupTemplate('content/image_grid.tpl'), [
 					'columns' => [
-						'fc' => $img_tags[0],
-						'sc' => $img_tags[1],
+						'fc' => $img_tags_fc,
+						'sc' => $img_tags_sc,
 					],
 				]);
 				return $img_grid;
diff --git a/view/templates/content/image_grid.tpl b/view/templates/content/image_grid.tpl
index 7a06d3372..1a8648d18 100644
--- a/view/templates/content/image_grid.tpl
+++ b/view/templates/content/image_grid.tpl
@@ -2,13 +2,17 @@
 
 <div id="row" class="row">
 	<div class="column">
-        {{foreach $columns.fc as $img}}
-        	{{include file="content/image.tpl" image=$img}}
+        {{foreach $columns.fc as $fc}}
+        	{{foreach $fc as $img}}
+	        	{{include file="content/image.tpl" image=$img}}
+			{{/foreach}}
 		{{/foreach}}
 	</div>
 	<div class="column">
-        {{foreach $columns.sc as $img}}
-    	    {{include file="content/image.tpl" image=$img}}
+        {{foreach $columns.sc as $sc}}
+			{{foreach $sc as $img}}
+				{{include file="content/image.tpl" image=$img}}
+			{{/foreach}}
 		{{/foreach}}
 	</div>
 </div>
\ No newline at end of file

From 9778b60e64974eaf51aa45a2659cbe53993239a7 Mon Sep 17 00:00:00 2001
From: Marek Bachmann <marek.bachmann@comtec.eecs.uni-kassel.de>
Date: Tue, 6 Dec 2022 01:14:15 +0100
Subject: [PATCH 07/21] cleaned up my git mess :-/ anyways, should work now

---
 src/Model/Item.php | 38 --------------------------------------
 1 file changed, 38 deletions(-)

diff --git a/src/Model/Item.php b/src/Model/Item.php
index b7e7fe92c..634dbbd0e 100644
--- a/src/Model/Item.php
+++ b/src/Model/Item.php
@@ -3134,44 +3134,6 @@ class Item
 		return $hook_data['html'];
 	}
 
-	private function make_image_grid(array &$data)
-	{
-		$item = $data['item'];
-		if ($item['has-media']) {
-			$attachments = Post\Media::splitAttachments($item['uri-id'], [], $item['has-media'] ?? false);
-			if (count($attachments['visual']) > 1) {
-				$img_tags_fc = array();
-				$img_tags_sc = array();
-				$count = 0;
-				foreach ($attachments['visual'] as $attachment) {
-					$src_url = Post\Media::getUrlForId($attachment['id']);
-					$preview_url = Post\Media::getPreviewUrlForId($attachment['id'], ($attachment['width'] > $attachment['height']) ? Proxy::SIZE_MEDIUM : Proxy::SIZE_LARGE);
-					$img_tag = array(
-						'$image' => [
-							'src' => $src_url,
-							'preview' => $preview_url,
-							'attachment' => $attachment,
-					]);
-					if ($count % 2 == 0) {
-						$img_tags_fc[] = $img_tag;
-					} else {
-						$img_tags_sc[] = $img_tag;
-					}
-					++$count;
-				}
-
-				$img_grid = Renderer::replaceMacros(Renderer::getMarkupTemplate('content/image_grid.tpl'), [
-					'columns' => [
-						'fc' => $img_tags_fc,
-						'sc' => $img_tags_sc,
-					],
-				]);
-				return $img_grid;
-			}
-		}
-
-	}
-
 	/**
 	 * This function removes images at the very end of a post based on the assumption that this images are interpreted
 	 * as attachments

From 99e20d1b009680904fe828e4159f7ef00d79778b Mon Sep 17 00:00:00 2001
From: Marek Bachmann <marek.bachmann@comtec.eecs.uni-kassel.de>
Date: Wed, 7 Dec 2022 13:22:28 +0100
Subject: [PATCH 08/21] Temporary hack to remove images after last text line by
 DOM inspection

---
 src/Model/Item.php | 58 +++++++++++++++++++++++++++++++++++-----------
 1 file changed, 45 insertions(+), 13 deletions(-)

diff --git a/src/Model/Item.php b/src/Model/Item.php
index 634dbbd0e..767c41acf 100644
--- a/src/Model/Item.php
+++ b/src/Model/Item.php
@@ -3086,11 +3086,6 @@ class Item
 			'filter_reasons' => $filter_reasons
 		];
 		Hook::callAll('prepare_body', $hook_data);
-		// Remove old images
-//		$hook_data['html'] = preg_replace('|(<a.*><img.*>.*</a>)|', '', $hook_data['html']);
-//		$grid = self::make_image_grid($hook_data);
-//		$s = $hook_data['html'] . $grid;
-		$s = $hook_data['html'];
 		unset($hook_data);
 
 		if (!$attach) {
@@ -3128,9 +3123,15 @@ class Item
 
 		$s = HTML::applyContentFilter($s, $filter_reasons);
 
+		if (count($attachments['visual']) > 1) {
+			// make imgae grid only for multiple images
+			$s = self::cutAttachedImages($s);
+			$grid = self::make_image_grid($item, $attachments);
+			$s .= $grid;
+		}
+
 		$hook_data = ['item' => $item, 'html' => $s];
 		Hook::callAll('prepare_body_final', $hook_data);
-
 		return $hook_data['html'];
 	}
 
@@ -3140,14 +3141,47 @@ class Item
 	 * @param array $rendered_html
 	 * @return array
 	 */
-	private function cutAttachedImages(array &$rendered_html) {
+	private function cutAttachedImages($rendered_html)
+	{
 		$doc = new DOMDocument();
+		libxml_use_internal_errors(true);
 		$doc->loadHTML($rendered_html);
+		libxml_clear_errors();
 
-		$xpathsearch = new DOMXPath($doc);
-		$nodes = $xpathsearch->query("*");
+		$root = $doc->getElementsByTagName("p")[0];
 
-		return $nodes;
+		$lastTextNode = null;
+		if ($root && $root->childNodes) {
+			foreach ($root->childNodes as $node) {
+				if ($node->nodeName == "#text" && strlen(trim($node->nodeValue)) > 0) {
+					$lastTextNode = $node;
+				}
+			}
+		}
+
+		if ($lastTextNode == null) {
+			// no text at all, return nothing:
+			return '';
+		}
+
+		$toremove = array();
+		if ($lastTextNode) {
+			$sibling = $lastTextNode->nextSibling;
+			while ($sibling) {
+				$toremove[] = array($sibling);
+				$sibling = $sibling->nextSibling;
+			}
+			foreach ($toremove as $remove) {
+				$root->removeChild($remove[0]);
+			}
+			$html = '';
+			foreach ($root->childNodes as $node) {
+				$html .= $node->ownerDocument->saveHTML($node);
+			}
+			return $html;
+		}
+
+		return $rendered_html;
 	}
 
 	/**
@@ -3155,11 +3189,9 @@ class Item
 	 * @return string|void
 	 * @throws \Friendica\Network\HTTPException\ServiceUnavailableException
 	 */
-	private function make_image_grid(array &$data)
+	private function make_image_grid(array $item, array $attachments)
 	{
-		$item = $data['item'];
 		if ($item['has-media']) {
-			$attachments = Post\Media::splitAttachments($item['uri-id'], [], $item['has-media'] ?? false);
 			if (count($attachments['visual']) > 1) {
 				$img_tags_fc = array();
 				$img_tags_sc = array();

From d590df9a72eb842813dff45d24d2698698a6f958 Mon Sep 17 00:00:00 2001
From: Marek Bachmann <marek.bachmann@comtec.eecs.uni-kassel.de>
Date: Wed, 7 Dec 2022 18:50:16 +0100
Subject: [PATCH 09/21] set character encoding to utf-8 for parsing
 rendered-html

---
 src/Model/Item.php | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/Model/Item.php b/src/Model/Item.php
index 767c41acf..e7bf057b4 100644
--- a/src/Model/Item.php
+++ b/src/Model/Item.php
@@ -3143,9 +3143,9 @@ class Item
 	 */
 	private function cutAttachedImages($rendered_html)
 	{
-		$doc = new DOMDocument();
+		$doc = new DOMDocument('1.0', 'UTF-8');
 		libxml_use_internal_errors(true);
-		$doc->loadHTML($rendered_html);
+		$doc->loadHTML(mb_convert_encoding($rendered_html, 'html-entities', 'utf-8'));
 		libxml_clear_errors();
 
 		$root = $doc->getElementsByTagName("p")[0];

From d270a98e862624f4d240c849d2a42c6bf57216e2 Mon Sep 17 00:00:00 2001
From: Marek Bachmann <marek.bachmann@comtec.eecs.uni-kassel.de>
Date: Thu, 8 Dec 2022 20:39:51 +0100
Subject: [PATCH 10/21] Image grid logic

---
 src/Model/Item.php | 36 ++++++++++++++++++++++++------------
 1 file changed, 24 insertions(+), 12 deletions(-)

diff --git a/src/Model/Item.php b/src/Model/Item.php
index e7bf057b4..1d3e3afba 100644
--- a/src/Model/Item.php
+++ b/src/Model/Item.php
@@ -3193,9 +3193,9 @@ class Item
 	{
 		if ($item['has-media']) {
 			if (count($attachments['visual']) > 1) {
-				$img_tags_fc = array();
-				$img_tags_sc = array();
-				$count = 0;
+
+				$img_tags_landscape = array();
+				$img_tags_portrait = array();
 				foreach ($attachments['visual'] as $attachment) {
 					$src_url = Post\Media::getUrlForId($attachment['id']);
 					$preview_url = Post\Media::getPreviewUrlForId($attachment['id'], ($attachment['width'] > $attachment['height']) ? Proxy::SIZE_MEDIUM : Proxy::SIZE_LARGE);
@@ -3205,22 +3205,34 @@ class Item
 							'preview' => $preview_url,
 							'attachment' => $attachment,
 					]);
-					// @todo add some fany ai to divide images equally on both columns
-					if ($count % 2 == 0) {
-						$img_tags_fc[] = $img_tag;
-					} else {
-						$img_tags_sc[] = $img_tag;
-					}
-					++$count;
+					($attachment['width'] > $attachment['height']) ? ($img_tags_landscape[] = $img_tag) : ($img_tags_portrait[] = $img_tag);
 				}
 
-				$img_grid = Renderer::replaceMacros(Renderer::getMarkupTemplate('content/image_grid.tpl'), [
+				$landscapesCount = count($img_tags_landscape);
+				$portraitsCount = count($img_tags_portrait);
+
+				// @todo add some fany ai to divide images equally on both columns
+				$img_tags_fc = array();
+				$img_tags_sc = array();
+				if ($landscapesCount == 0) {
+					// only portrait
+					for ($i = 0; $i < $portraitsCount; $i++) {
+						($i % 2 == 0) ? ($img_tags_fc[] = $img_tags_portrait[$i]) : ($img_tags_sc[] = $img_tags_portrait[$i]);
+					}
+				}
+				if ($portraitsCount == 0) {
+					// ony landscapes
+					for ($i = 0; $i < $landscapesCount; $i++) {
+						($i % 2 == 0) ? ($img_tags_fc[] = $img_tags_landscape[$i]) : ($img_tags_sc[] = $img_tags_landscape[$i]);
+					}
+				}
+
+				return Renderer::replaceMacros(Renderer::getMarkupTemplate('content/image_grid.tpl'), [
 					'columns' => [
 						'fc' => $img_tags_fc,
 						'sc' => $img_tags_sc,
 					],
 				]);
-				return $img_grid;
 			}
 		}
 

From d786f225eec56dbef7dacdc65af0b65ed4643163 Mon Sep 17 00:00:00 2001
From: Marek Bachmann <marek.bachmann@comtec.eecs.uni-kassel.de>
Date: Sat, 10 Dec 2022 22:54:50 +0100
Subject: [PATCH 11/21] Added image grid generation to addVisualAttachments

---
 src/Model/Item.php                    | 73 +++++++++++++++++++++------
 view/templates/content/image_grid.tpl |  8 +--
 2 files changed, 60 insertions(+), 21 deletions(-)

diff --git a/src/Model/Item.php b/src/Model/Item.php
index 5f7c64a13..0c31d437f 100644
--- a/src/Model/Item.php
+++ b/src/Model/Item.php
@@ -3130,18 +3130,56 @@ class Item
 
 		$s = HTML::applyContentFilter($s, $filter_reasons);
 
-		if (count($attachments['visual']) > 1) {
-			// make imgae grid only for multiple images
-			$s = self::cutAttachedImages($s);
-			$grid = self::make_image_grid($item, $attachments);
-			$s .= $grid;
-		}
+//		if (count($attachments['visual']) > 1) {
+//			// make imgae grid only for multiple images
+//			$s = self::cutAttachedImages($s);
+//			$grid = self::make_image_grid($item, $attachments);
+//			$s .= $grid;
+//		}
 
 		$hook_data = ['item' => $item, 'html' => $s];
 		Hook::callAll('prepare_body_final', $hook_data);
 		return $hook_data['html'];
 	}
 
+	/**
+	 * @param array $images
+	 * @return string
+	 * @throws \Friendica\Network\HTTPException\ServiceUnavailableException
+	 */
+	public static function makeImageGrid(array $images): string
+	{
+		$img_tags_landscape = array();
+		$img_tags_portrait = array();
+		foreach ($images as $image) {
+			($image['attachment']['width'] > $image['attachment']['height']) ? ($img_tags_landscape[] = $image) : ($img_tags_portrait[] = $image);
+		}
+
+		// @todo add some fany ai to divide images equally on both columns
+		$img_tags_fc = array();
+		$img_tags_sc = array();
+		if (count($img_tags_landscape) == 0) {
+			// only portrait
+			for ($i = 0; $i < count($img_tags_portrait); $i++) {
+				($i % 2 == 0) ? ($img_tags_fc[] = $img_tags_portrait[$i]) : ($img_tags_sc[] = $img_tags_portrait[$i]);
+			}
+		}
+		if (count($img_tags_portrait) == 0) {
+			// ony landscapes
+			for ($i = 0; $i < count($img_tags_landscape); $i++) {
+				($i % 2 == 0) ? ($img_tags_fc[] = $img_tags_landscape[$i]) : ($img_tags_sc[] = $img_tags_landscape[$i]);
+			}
+		}
+
+		$media = Renderer::replaceMacros(Renderer::getMarkupTemplate('content/image_grid.tpl'), [
+			'columns' => [
+				'fc' => $img_tags_fc,
+				'sc' => $img_tags_sc,
+			],
+		]);
+		return $media;
+	}
+
 	/**
 	 * This function removes images at the very end of a post based on the assumption that this images are interpreted
 	 * as attachments
@@ -3396,16 +3434,21 @@ class Item
 			}
 		}
 
-		foreach ($images as $image) {
-			$media = Renderer::replaceMacros(Renderer::getMarkupTemplate('content/image.tpl'), [
-				'$image' => $image,
+		$media = '';
+		if (count($images) > 1) {
+			$media = self::makeImageGrid($images);
+		}
+		elseif (count($images) == 1) {
+			$media = $media = Renderer::replaceMacros(Renderer::getMarkupTemplate('content/image.tpl'), [
+				'$image' => $images[0],
 			]);
-			// On Diaspora posts the attached pictures are leading
-			if ($item['network'] == Protocol::DIASPORA) {
-				$leading .= $media;
-			} else {
-				$trailing .= $media;
-			}
+		}
+
+		// On Diaspora posts the attached pictures are leading
+		if ($item['network'] == Protocol::DIASPORA) {
+			$leading .= $media;
+		} else {
+			$trailing .= $media;
 		}
 
 		if ($shared) {
diff --git a/view/templates/content/image_grid.tpl b/view/templates/content/image_grid.tpl
index 1a8648d18..8f5cbabca 100644
--- a/view/templates/content/image_grid.tpl
+++ b/view/templates/content/image_grid.tpl
@@ -2,17 +2,13 @@
 
 <div id="row" class="row">
 	<div class="column">
-        {{foreach $columns.fc as $fc}}
-        	{{foreach $fc as $img}}
+        {{foreach $columns.fc as $img}}
 	        	{{include file="content/image.tpl" image=$img}}
-			{{/foreach}}
 		{{/foreach}}
 	</div>
 	<div class="column">
-        {{foreach $columns.sc as $sc}}
-			{{foreach $sc as $img}}
+        {{foreach $columns.sc as $img}}
 				{{include file="content/image.tpl" image=$img}}
-			{{/foreach}}
 		{{/foreach}}
 	</div>
 </div>
\ No newline at end of file

From cc048bca38d5700556edd7b40dd1f139407febb0 Mon Sep 17 00:00:00 2001
From: Marek Bachmann <marek.bachmann@comtec.eecs.uni-kassel.de>
Date: Sat, 10 Dec 2022 22:58:43 +0100
Subject: [PATCH 12/21] remove old code

---
 src/Model/Item.php | 110 ---------------------------------------------
 1 file changed, 110 deletions(-)

diff --git a/src/Model/Item.php b/src/Model/Item.php
index 0c31d437f..165e31d12 100644
--- a/src/Model/Item.php
+++ b/src/Model/Item.php
@@ -3130,13 +3130,6 @@ class Item
 
 		$s = HTML::applyContentFilter($s, $filter_reasons);
 
-//		if (count($attachments['visual']) > 1) {
-//			// make imgae grid only for multiple images
-//			$s = self::cutAttachedImages($s);
-//			$grid = self::make_image_grid($item, $attachments);
-//			$s .= $grid;
-//		}
-
 		$hook_data = ['item' => $item, 'html' => $s];
 		Hook::callAll('prepare_body_final', $hook_data);
 		return $hook_data['html'];
@@ -3180,109 +3173,6 @@ class Item
 		return $media;
 	}
 
-	/**
-	 * This function removes images at the very end of a post based on the assumption that this images are interpreted
-	 * as attachments
-	 * @param array $rendered_html
-	 * @return array
-	 */
-	private function cutAttachedImages($rendered_html)
-	{
-		$doc = new DOMDocument('1.0', 'UTF-8');
-		libxml_use_internal_errors(true);
-		$doc->loadHTML(mb_convert_encoding($rendered_html, 'html-entities', 'utf-8'));
-		libxml_clear_errors();
-
-		$root = $doc->getElementsByTagName("p")[0];
-
-		$lastTextNode = null;
-		if ($root && $root->childNodes) {
-			foreach ($root->childNodes as $node) {
-				if ($node->nodeName == "#text" && strlen(trim($node->nodeValue)) > 0) {
-					$lastTextNode = $node;
-				}
-			}
-		}
-
-		if ($lastTextNode == null) {
-			// no text at all, return nothing:
-			return '';
-		}
-
-		$toremove = array();
-		if ($lastTextNode) {
-			$sibling = $lastTextNode->nextSibling;
-			while ($sibling) {
-				$toremove[] = array($sibling);
-				$sibling = $sibling->nextSibling;
-			}
-			foreach ($toremove as $remove) {
-				$root->removeChild($remove[0]);
-			}
-			$html = '';
-			foreach ($root->childNodes as $node) {
-				$html .= $node->ownerDocument->saveHTML($node);
-			}
-			return $html;
-		}
-
-		return $rendered_html;
-	}
-
-	/**
-	 * @param array $data
-	 * @return string|void
-	 * @throws \Friendica\Network\HTTPException\ServiceUnavailableException
-	 */
-	private function make_image_grid(array $item, array $attachments)
-	{
-		if ($item['has-media']) {
-			if (count($attachments['visual']) > 1) {
-
-				$img_tags_landscape = array();
-				$img_tags_portrait = array();
-				foreach ($attachments['visual'] as $attachment) {
-					$src_url = Post\Media::getUrlForId($attachment['id']);
-					$preview_url = Post\Media::getPreviewUrlForId($attachment['id'], ($attachment['width'] > $attachment['height']) ? Proxy::SIZE_MEDIUM : Proxy::SIZE_LARGE);
-					$img_tag = array(
-						'$image' => [
-							'src' => $src_url,
-							'preview' => $preview_url,
-							'attachment' => $attachment,
-					]);
-					($attachment['width'] > $attachment['height']) ? ($img_tags_landscape[] = $img_tag) : ($img_tags_portrait[] = $img_tag);
-				}
-
-				$landscapesCount = count($img_tags_landscape);
-				$portraitsCount = count($img_tags_portrait);
-
-				// @todo add some fany ai to divide images equally on both columns
-				$img_tags_fc = array();
-				$img_tags_sc = array();
-				if ($landscapesCount == 0) {
-					// only portrait
-					for ($i = 0; $i < $portraitsCount; $i++) {
-						($i % 2 == 0) ? ($img_tags_fc[] = $img_tags_portrait[$i]) : ($img_tags_sc[] = $img_tags_portrait[$i]);
-					}
-				}
-				if ($portraitsCount == 0) {
-					// ony landscapes
-					for ($i = 0; $i < $landscapesCount; $i++) {
-						($i % 2 == 0) ? ($img_tags_fc[] = $img_tags_landscape[$i]) : ($img_tags_sc[] = $img_tags_landscape[$i]);
-					}
-				}
-
-				return Renderer::replaceMacros(Renderer::getMarkupTemplate('content/image_grid.tpl'), [
-					'columns' => [
-						'fc' => $img_tags_fc,
-						'sc' => $img_tags_sc,
-					],
-				]);
-			}
-		}
-
-	}
-
 	/**
 	 * Check if the body contains a link
 	 *

From 2eb170bdbd4f56dd75a8413f3d256ef346a79b74 Mon Sep 17 00:00:00 2001
From: Marek Bachmann <marek.bachmann@comtec.eecs.uni-kassel.de>
Date: Sat, 10 Dec 2022 23:37:03 +0100
Subject: [PATCH 13/21] Added some logic for image grid column balancing

---
 src/Model/Item.php | 66 ++++++++++++++++++++++++++++++++++++++--------
 1 file changed, 55 insertions(+), 11 deletions(-)

diff --git a/src/Model/Item.php b/src/Model/Item.php
index 165e31d12..dedf90516 100644
--- a/src/Model/Item.php
+++ b/src/Model/Item.php
@@ -3151,26 +3151,70 @@ class Item
 		// @todo add some fany ai to divide images equally on both columns
 		$img_tags_fc = array();
 		$img_tags_sc = array();
-		if (count($img_tags_landscape) == 0) {
-			// only portrait
-			for ($i = 0; $i < count($img_tags_portrait); $i++) {
-				($i % 2 == 0) ? ($img_tags_fc[] = $img_tags_portrait[$i]) : ($img_tags_sc[] = $img_tags_portrait[$i]);
+		if (count($img_tags_landscape) == 0 || count($img_tags_portrait) == 0) {
+			if (count($img_tags_landscape) == 0) {
+				// only portrait
+				for ($i = 0; $i < count($img_tags_portrait); $i++) {
+					($i % 2 == 0) ? ($img_tags_fc[] = $img_tags_portrait[$i]) : ($img_tags_sc[] = $img_tags_portrait[$i]);
+				}
 			}
-		}
-		if (count($img_tags_portrait) == 0) {
-			// ony landscapes
-			for ($i = 0; $i < count($img_tags_landscape); $i++) {
-				($i % 2 == 0) ? ($img_tags_fc[] = $img_tags_landscape[$i]) : ($img_tags_sc[] = $img_tags_landscape[$i]);
+			if (count($img_tags_portrait) == 0) {
+				// ony landscapes
+				for ($i = 0; $i < count($img_tags_landscape); $i++) {
+					($i % 2 == 0) ? ($img_tags_fc[] = $img_tags_landscape[$i]) : ($img_tags_sc[] = $img_tags_landscape[$i]);
+				}
 			}
+		} else {
+			// Mix of landscape and portrait images
+			$domformat = (count($img_tags_landscape) > count($img_tags_portrait)) ? 'landscape' : 'portrait';
+			if ($domformat == 'landscape') {
+				// More landscapes than portraits
+				for ($l = 0; $l < count($img_tags_landscape); $l++) {
+					// use two landscapes for on portrait
+					if ((count($img_tags_landscape) > $l + 1) && (count($img_tags_portrait) > $l)) {
+						// we have one more landscape that can be used for the l-th portrait
+						$img_tags_fc[] = $img_tags_landscape[$l];
+						$img_tags_fc[] = $img_tags_landscape[$l + 1];
+						$img_tags_sc[] = $img_tags_portrait[$l];
+						$l++;
+					} elseif (count($img_tags_portrait) <= $l) {
+						// no more portraits available but landscapes
+						$img_tags_fc[] = $img_tags_landscape[$l];
+					}
+				}
+			}
+			if ($domformat == 'portrait') {
+				// More  portraits than landscapes
+				$l = 0;
+				for ($p = 0; $p < count($img_tags_portrait); $p++) {
+					// use two landscapes for on portrait
+					if ((count($img_tags_landscape) > $l + 1)) {
+						// we have one more landscape that can be used for the p-th portrait
+						$img_tags_sc[] = $img_tags_landscape[$l];
+						$img_tags_sc[] = $img_tags_landscape[$l + 1];
+						$img_tags_fc[] = $img_tags_portrait[$p];
+						// used to landscapes:
+						$l += 2;
+					} else {
+						// no more landscapes available
+						if ($p % 2 == 0 ) {
+							$img_tags_fc[] = $img_tags_landscape[$l];
+						} else {
+							$img_tags_sc[] = $img_tags_landscape[$l];
+						}
+
+					}
+				}
+			}
+
 		}
 
-		$media = Renderer::replaceMacros(Renderer::getMarkupTemplate('content/image_grid.tpl'), [
+		return Renderer::replaceMacros(Renderer::getMarkupTemplate('content/image_grid.tpl'), [
 			'columns' => [
 				'fc' => $img_tags_fc,
 				'sc' => $img_tags_sc,
 			],
 		]);
-		return $media;
 	}
 
 	/**

From 236a4c819b9aec34971d86be0408547d29735117 Mon Sep 17 00:00:00 2001
From: Marek Bachmann <marek.bachmann@comtec.eecs.uni-kassel.de>
Date: Sat, 10 Dec 2022 23:44:23 +0100
Subject: [PATCH 14/21] Removed not needed image_grid_column.tpl

---
 view/templates/content/image_grid_column.tpl | 1 -
 1 file changed, 1 deletion(-)
 delete mode 100644 view/templates/content/image_grid_column.tpl

diff --git a/view/templates/content/image_grid_column.tpl b/view/templates/content/image_grid_column.tpl
deleted file mode 100644
index 6a58a4bda..000000000
--- a/view/templates/content/image_grid_column.tpl
+++ /dev/null
@@ -1 +0,0 @@
-<div class="column">{{$images}}</div>
\ No newline at end of file

From 412ba461e7893ca6e717e989be946ed05deab7ca Mon Sep 17 00:00:00 2001
From: Marek Bachmann <marek.bachmann@comtec.eecs.uni-kassel.de>
Date: Sat, 10 Dec 2022 23:45:42 +0100
Subject: [PATCH 15/21] Removed unused imports

---
 src/Model/Item.php | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/src/Model/Item.php b/src/Model/Item.php
index dedf90516..d134ca7d6 100644
--- a/src/Model/Item.php
+++ b/src/Model/Item.php
@@ -21,8 +21,6 @@
 
 namespace Friendica\Model;
 
-use DOMDocument;
-use DOMXPath;
 use Friendica\Content\Text\BBCode;
 use Friendica\Content\Text\HTML;
 use Friendica\Core\Hook;
@@ -30,7 +28,6 @@ use Friendica\Core\Logger;
 use Friendica\Core\Protocol;
 use Friendica\Core\Renderer;
 use Friendica\Core\System;
-use Friendica\Model\Tag;
 use Friendica\Core\Worker;
 use Friendica\Database\DBA;
 use Friendica\DI;

From fe2c4f7c4b592e9991034a53378952bb52f8de68 Mon Sep 17 00:00:00 2001
From: Marek Bachmann <marek.bachmann@comtec.eecs.uni-kassel.de>
Date: Sat, 10 Dec 2022 23:47:37 +0100
Subject: [PATCH 16/21] Restored $s = $hook_data['html']; call which was
 removed on error

---
 src/Model/Item.php | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/Model/Item.php b/src/Model/Item.php
index d134ca7d6..921d35882 100644
--- a/src/Model/Item.php
+++ b/src/Model/Item.php
@@ -3090,6 +3090,8 @@ class Item
 			'filter_reasons' => $filter_reasons
 		];
 		Hook::callAll('prepare_body', $hook_data);
+		$s = $hook_data['html'];
+		
 		unset($hook_data);
 
 		if (!$attach) {

From 58cc270da8c9ea838c75886d279ffe422dc5e42b Mon Sep 17 00:00:00 2001
From: Marek Bachmann <marek.bachmann@comtec.eecs.uni-kassel.de>
Date: Sun, 11 Dec 2022 17:09:28 +0100
Subject: [PATCH 17/21] fixed bug in portrait iteration

shortened var names

added some comments
---
 src/Model/Item.php | 39 ++++++++++++++++++++-------------------
 1 file changed, 20 insertions(+), 19 deletions(-)

diff --git a/src/Model/Item.php b/src/Model/Item.php
index 3b9477fc3..23cd4b7b0 100644
--- a/src/Model/Item.php
+++ b/src/Model/Item.php
@@ -3148,37 +3148,38 @@ class Item
 		}
 
 		// @todo add some fany ai to divide images equally on both columns
-		$img_tags_fc = array();
-		$img_tags_sc = array();
+		// Image for first column (fc) and second column (sc)
+		$imgs_fc = array();
+		$imgs_sc = array();
 		if (count($img_tags_landscape) == 0 || count($img_tags_portrait) == 0) {
 			if (count($img_tags_landscape) == 0) {
 				// only portrait
 				for ($i = 0; $i < count($img_tags_portrait); $i++) {
-					($i % 2 == 0) ? ($img_tags_fc[] = $img_tags_portrait[$i]) : ($img_tags_sc[] = $img_tags_portrait[$i]);
+					($i % 2 == 0) ? ($imgs_fc[] = $img_tags_portrait[$i]) : ($imgs_sc[] = $img_tags_portrait[$i]);
 				}
 			}
 			if (count($img_tags_portrait) == 0) {
 				// ony landscapes
 				for ($i = 0; $i < count($img_tags_landscape); $i++) {
-					($i % 2 == 0) ? ($img_tags_fc[] = $img_tags_landscape[$i]) : ($img_tags_sc[] = $img_tags_landscape[$i]);
+					($i % 2 == 0) ? ($imgs_fc[] = $img_tags_landscape[$i]) : ($imgs_sc[] = $img_tags_landscape[$i]);
 				}
 			}
 		} else {
-			// Mix of landscape and portrait images
-			$domformat = (count($img_tags_landscape) > count($img_tags_portrait)) ? 'landscape' : 'portrait';
+			// Mix of landscape and portrait images. Which format is dominating (domformat)?
+			$domformat = (count($img_tags_landscape) >= count($img_tags_portrait)) ? 'landscape' : 'portrait';
 			if ($domformat == 'landscape') {
-				// More landscapes than portraits
+				// More or equal landscapes than portraits
 				for ($l = 0; $l < count($img_tags_landscape); $l++) {
 					// use two landscapes for on portrait
 					if ((count($img_tags_landscape) > $l + 1) && (count($img_tags_portrait) > $l)) {
 						// we have one more landscape that can be used for the l-th portrait
-						$img_tags_fc[] = $img_tags_landscape[$l];
-						$img_tags_fc[] = $img_tags_landscape[$l + 1];
-						$img_tags_sc[] = $img_tags_portrait[$l];
+						$imgs_fc[] = $img_tags_landscape[$l];
+						$imgs_fc[] = $img_tags_landscape[$l + 1];
+						$imgs_sc[] = $img_tags_portrait[$l];
 						$l++;
 					} elseif (count($img_tags_portrait) <= $l) {
 						// no more portraits available but landscapes
-						$img_tags_fc[] = $img_tags_landscape[$l];
+						$imgs_fc[] = $img_tags_landscape[$l];
 					}
 				}
 			}
@@ -3188,18 +3189,18 @@ class Item
 				for ($p = 0; $p < count($img_tags_portrait); $p++) {
 					// use two landscapes for on portrait
 					if ((count($img_tags_landscape) > $l + 1)) {
-						// we have one more landscape that can be used for the p-th portrait
-						$img_tags_sc[] = $img_tags_landscape[$l];
-						$img_tags_sc[] = $img_tags_landscape[$l + 1];
-						$img_tags_fc[] = $img_tags_portrait[$p];
+						// we have at least one more landscape that can be used for the p-th portrait
+						$imgs_sc[] = $img_tags_landscape[$l];
+						$imgs_sc[] = $img_tags_landscape[$l + 1];
+						$imgs_fc[] = $img_tags_portrait[$p];
 						// used to landscapes:
 						$l += 2;
 					} else {
 						// no more landscapes available
 						if ($p % 2 == 0 ) {
-							$img_tags_fc[] = $img_tags_landscape[$l];
+							$imgs_fc[] = $img_tags_portrait[$p];
 						} else {
-							$img_tags_sc[] = $img_tags_landscape[$l];
+							$imgs_sc[] = $img_tags_portrait[$p];
 						}
 
 					}
@@ -3210,8 +3211,8 @@ class Item
 
 		return Renderer::replaceMacros(Renderer::getMarkupTemplate('content/image_grid.tpl'), [
 			'columns' => [
-				'fc' => $img_tags_fc,
-				'sc' => $img_tags_sc,
+				'fc' => $imgs_fc,
+				'sc' => $imgs_sc,
 			],
 		]);
 	}

From eb1cfd09a9eeefc2e31d1d4df0ecb8405b5a8d80 Mon Sep 17 00:00:00 2001
From: Marek Bachmann <marek.bachmann@comtec.eecs.uni-kassel.de>
Date: Sun, 11 Dec 2022 18:25:19 +0100
Subject: [PATCH 18/21] added more sophisticated column balancing logic for
 portraits and landscapes

---
 src/Model/Item.php | 143 ++++++++++++++++++++++++++++-----------------
 1 file changed, 91 insertions(+), 52 deletions(-)

diff --git a/src/Model/Item.php b/src/Model/Item.php
index 23cd4b7b0..68fb01dd1 100644
--- a/src/Model/Item.php
+++ b/src/Model/Item.php
@@ -3141,78 +3141,117 @@ class Item
 	 */
 	public static function makeImageGrid(array $images): string
 	{
-		$img_tags_landscape = array();
-		$img_tags_portrait = array();
+		$landscapeimages = array();
+		$portraitimages = array();
+
 		foreach ($images as $image) {
-			($image['attachment']['width'] > $image['attachment']['height']) ? ($img_tags_landscape[] = $image) : ($img_tags_portrait[] = $image);
+			($image['attachment']['width'] > $image['attachment']['height']) ? ($landscapeimages[] = $image) : ($portraitimages[] = $image);
 		}
 
-		// @todo add some fany ai to divide images equally on both columns
 		// Image for first column (fc) and second column (sc)
-		$imgs_fc = array();
-		$imgs_sc = array();
-		if (count($img_tags_landscape) == 0 || count($img_tags_portrait) == 0) {
-			if (count($img_tags_landscape) == 0) {
+		$images_fc = array();
+		$images_sc = array();
+		$lcount = count($landscapeimages);
+		$pcount = count($portraitimages);
+		if ($lcount == 0 || $pcount == 0) {
+			if ($lcount == 0) {
 				// only portrait
-				for ($i = 0; $i < count($img_tags_portrait); $i++) {
-					($i % 2 == 0) ? ($imgs_fc[] = $img_tags_portrait[$i]) : ($imgs_sc[] = $img_tags_portrait[$i]);
+				for ($i = 0; $i < $pcount; $i++) {
+					($i % 2 == 0) ? ($images_fc[] = $portraitimages[$i]) : ($images_sc[] = $portraitimages[$i]);
 				}
 			}
-			if (count($img_tags_portrait) == 0) {
+			if ($pcount == 0) {
 				// ony landscapes
-				for ($i = 0; $i < count($img_tags_landscape); $i++) {
-					($i % 2 == 0) ? ($imgs_fc[] = $img_tags_landscape[$i]) : ($imgs_sc[] = $img_tags_landscape[$i]);
+				for ($i = 0; $i < $lcount; $i++) {
+					($i % 2 == 0) ? ($images_fc[] = $landscapeimages[$i]) : ($images_sc[] = $landscapeimages[$i]);
 				}
 			}
 		} else {
-			// Mix of landscape and portrait images. Which format is dominating (domformat)?
-			$domformat = (count($img_tags_landscape) >= count($img_tags_portrait)) ? 'landscape' : 'portrait';
-			if ($domformat == 'landscape') {
-				// More or equal landscapes than portraits
-				for ($l = 0; $l < count($img_tags_landscape); $l++) {
-					// use two landscapes for on portrait
-					if ((count($img_tags_landscape) > $l + 1) && (count($img_tags_portrait) > $l)) {
-						// we have one more landscape that can be used for the l-th portrait
-						$imgs_fc[] = $img_tags_landscape[$l];
-						$imgs_fc[] = $img_tags_landscape[$l + 1];
-						$imgs_sc[] = $img_tags_portrait[$l];
-						$l++;
-					} elseif (count($img_tags_portrait) <= $l) {
-						// no more portraits available but landscapes
-						$imgs_fc[] = $img_tags_landscape[$l];
-					}
-				}
-			}
-			if ($domformat == 'portrait') {
-				// More  portraits than landscapes
-				$l = 0;
-				for ($p = 0; $p < count($img_tags_portrait); $p++) {
-					// use two landscapes for on portrait
-					if ((count($img_tags_landscape) > $l + 1)) {
-						// we have at least one more landscape that can be used for the p-th portrait
-						$imgs_sc[] = $img_tags_landscape[$l];
-						$imgs_sc[] = $img_tags_landscape[$l + 1];
-						$imgs_fc[] = $img_tags_portrait[$p];
-						// used to landscapes:
-						$l += 2;
+			// Mix of landscape and portrait images.
+			if ($lcount == $pcount) {
+				// equal amount of landscapes and portraits
+				for ($l = 0; $l < $lcount; $l++) {
+					if ($l % 2 == 0) {
+						$images_fc[] = $landscapeimages[$l];
+						$images_fc[] = $portraitimages[$l];
 					} else {
-						// no more landscapes available
-						if ($p % 2 == 0 ) {
-							$imgs_fc[] = $img_tags_portrait[$p];
-						} else {
-							$imgs_sc[] = $img_tags_portrait[$p];
-						}
-
+						$images_sc[] = $portraitimages[$l];
+						$images_sc[] = $landscapeimages[$l];
 					}
 				}
 			}
+			if ($lcount > $pcount) {
+				// More landscapes than portraits
+				$p = 0;
+				$l = 0;
+				while ($l < $lcount) {
+					if (($lcount > $l + 1) && ($pcount > $l)) {
+						// we have one more landscape that can be used for the l-th portrait
+						$images_fc[] = $landscapeimages[$l++];
+					}
+					$images_fc[] = $landscapeimages[$l++];
+					if ($pcount > $p) {
+						$images_sc[] = $portraitimages[$p++];
+					}
 
+				}
+			}
+			if ($lcount < $pcount) {
+				// More  portraits than landscapes
+				if ($lcount % 2 == 0 && $pcount % 2 == 0) {
+					/*
+					 * even number of landscapes and portraits, but fewer landscapes than portraits. Iterate to the end
+					 * of landscapes array
+					 */
+					$i = 0;
+					while ($i < $lcount) {
+						if ($i % 2 == 0) {
+							$images_fc[] = $landscapeimages[$i];
+							$images_fc[] = $portraitimages[$i];
+						} else {
+							$images_sc[] = $portraitimages[$i];
+							$images_sc[] = $landscapeimages[$i];
+						}
+						$i++;
+					}
+					// Rest portraits
+					while ($i < $pcount) {
+						if ($i % 2 == 0) {
+							$images_fc[] = $portraitimages[$i];
+						} else {
+							$images_sc[] = $portraitimages[$i];
+						}
+						$i++;
+					}
+
+				}
+				if ($lcount % 2 != 0 && $pcount % 2 == 0) {
+					// uneven landscapes count even portraits count.
+					for ($p = 0; $p < $pcount; $p++) {
+						// --> First all portraits until
+						if ($p % 2 == 0) {
+							$images_fc[] = $portraitimages[$p];
+						} else {
+							$images_sc[] = $portraitimages[$p];
+						}
+					}
+					// and now the (uneven) landscapes
+					for ($l = 0; $l < $lcount; $l++) {
+						// --> First all portraits until
+						if ($l % 2 == 0) {
+							$images_fc[] = $landscapeimages[$l];
+						} else {
+							$images_sc[] = $landscapeimages[$l];
+						}
+					}
+				}
+			}
 		}
 
 		return Renderer::replaceMacros(Renderer::getMarkupTemplate('content/image_grid.tpl'), [
 			'columns' => [
-				'fc' => $imgs_fc,
-				'sc' => $imgs_sc,
+				'fc' => $images_fc,
+				'sc' => $images_sc,
 			],
 		]);
 	}

From bc70bc23a4788e01d2deb8e1859d8c6c3eb3f85e Mon Sep 17 00:00:00 2001
From: MarekBenjamin <117765478+MarekBenjamin@users.noreply.github.com>
Date: Mon, 12 Dec 2022 21:45:57 +0100
Subject: [PATCH 19/21] Update image_grid.css

---
 view/theme/frio/css/image_grid.css | 11 +----------
 1 file changed, 1 insertion(+), 10 deletions(-)

diff --git a/view/theme/frio/css/image_grid.css b/view/theme/frio/css/image_grid.css
index dd29dd201..5a39f6a4c 100644
--- a/view/theme/frio/css/image_grid.css
+++ b/view/theme/frio/css/image_grid.css
@@ -24,15 +24,6 @@
 	width: 100%;
 }
 
-/*!* Responsive layout - makes a two column-layout instead of four columns *!*/
-/*@media screen and (max-width: 50px) {*/
-/*	.column {*/
-/*		-ms-flex: 50%;*/
-/*		flex: 50%;*/
-/*		max-width: 50%;*/
-/*	}*/
-/*}*/
-
 /* Responsive layout - makes the two columns stack on top of each other instead of next to each other */
 @media screen and (max-width: 150px) {
 	.column {
@@ -40,4 +31,4 @@
 		flex: 100%;
 		max-width: 100%;
 	}
-}
\ No newline at end of file
+}

From 86b9cef273372ddbc522ab5df6bbc9157063a1f5 Mon Sep 17 00:00:00 2001
From: MarekBenjamin <117765478+MarekBenjamin@users.noreply.github.com>
Date: Mon, 12 Dec 2022 21:56:42 +0100
Subject: [PATCH 20/21] Update image_grid.css

Removed fall back to one column
---
 view/theme/frio/css/image_grid.css | 9 ---------
 1 file changed, 9 deletions(-)

diff --git a/view/theme/frio/css/image_grid.css b/view/theme/frio/css/image_grid.css
index 5a39f6a4c..2ecbcafea 100644
--- a/view/theme/frio/css/image_grid.css
+++ b/view/theme/frio/css/image_grid.css
@@ -23,12 +23,3 @@
 	vertical-align: middle;
 	width: 100%;
 }
-
-/* Responsive layout - makes the two columns stack on top of each other instead of next to each other */
-@media screen and (max-width: 150px) {
-	.column {
-		-ms-flex: 100%;
-		flex: 100%;
-		max-width: 100%;
-	}
-}

From 8690b311a873dd35c3c66d18a8fa677b5f01eea0 Mon Sep 17 00:00:00 2001
From: Marek Bachmann <marek.bachmann@comtec.eecs.uni-kassel.de>
Date: Mon, 12 Dec 2022 22:57:16 +0100
Subject: [PATCH 21/21] Moved image_grid.css content to global.css and use
 unique class names for imagegrid style classes, removed id for div

---
 view/global.css                       | 30 +++++++++++++++++++++++++++
 view/templates/content/image_grid.tpl | 14 ++++++-------
 view/theme/frio/css/image_grid.css    | 25 ----------------------
 3 files changed, 36 insertions(+), 33 deletions(-)
 delete mode 100644 view/theme/frio/css/image_grid.css

diff --git a/view/global.css b/view/global.css
index 4101f0fe0..81a1ba209 100644
--- a/view/global.css
+++ b/view/global.css
@@ -680,3 +680,33 @@ span.required {
 audio {
   width: 100%;
 }
+
+/**
+ * Image grid settings START
+ **/
+.imagegrid-row {
+	display: -ms-flexbox; /* IE10 */
+	display: flex;
+	-ms-flex-wrap: wrap; /* IE10 */
+	flex-wrap: wrap;
+	padding: 0 4px;
+	box-sizing: border-box;
+}
+
+/* Create four equal columns that sits next to each other */
+.imagegrid-column {
+	-ms-flex: 50%; /* IE10 */
+	flex: 50%;
+	max-width: 50%;
+	padding: 0 4px;
+	box-sizing: border-box;
+}
+
+.imagegrid-column img {
+	margin-top: 8px;
+	vertical-align: middle;
+	width: 100%;
+}
+/**
+ * Image grid settings END
+ **/
\ No newline at end of file
diff --git a/view/templates/content/image_grid.tpl b/view/templates/content/image_grid.tpl
index 8f5cbabca..95e49ee3e 100644
--- a/view/templates/content/image_grid.tpl
+++ b/view/templates/content/image_grid.tpl
@@ -1,13 +1,11 @@
-<link rel="stylesheet" href="view/theme/frio/css/image_grid.css" type="text/css" media="screen"/>
-
-<div id="row" class="row">
-	<div class="column">
-        {{foreach $columns.fc as $img}}
-	        	{{include file="content/image.tpl" image=$img}}
+<div class="imagegrid-row">
+	<div class="imagegrid-column">
+		{{foreach $columns.fc as $img}}
+				{{include file="content/image.tpl" image=$img}}
 		{{/foreach}}
 	</div>
-	<div class="column">
-        {{foreach $columns.sc as $img}}
+	<div class="imagegrid-column">
+		{{foreach $columns.sc as $img}}
 				{{include file="content/image.tpl" image=$img}}
 		{{/foreach}}
 	</div>
diff --git a/view/theme/frio/css/image_grid.css b/view/theme/frio/css/image_grid.css
deleted file mode 100644
index 2ecbcafea..000000000
--- a/view/theme/frio/css/image_grid.css
+++ /dev/null
@@ -1,25 +0,0 @@
-* {
-	box-sizing: border-box;
-}
-
-.row {
-	display: -ms-flexbox; /* IE10 */
-	display: flex;
-	-ms-flex-wrap: wrap; /* IE10 */
-	flex-wrap: wrap;
-	padding: 0 4px;
-}
-
-/* Create four equal columns that sits next to each other */
-.column {
-	-ms-flex: 50%; /* IE10 */
-	flex: 50%;
-	max-width: 50%;
-	padding: 0 4px;
-}
-
-.column img {
-	margin-top: 8px;
-	vertical-align: middle;
-	width: 100%;
-}