From 4b403e4fe2e38b4387dbf275dd069a5c415cab5b Mon Sep 17 00:00:00 2001
From: Michael <heluecht@pirati.ca>
Date: Sun, 10 Sep 2017 07:21:23 +0000
Subject: [PATCH] OStatus: Reworked import

---
 include/cron.php     |    6 -
 include/cronjobs.php |   14 -
 include/dfrn.php     |   30 +-
 include/ostatus.php  | 1623 +++++++++++++-----------------------------
 mod/display.php      |    2 +-
 5 files changed, 532 insertions(+), 1143 deletions(-)

diff --git a/include/cron.php b/include/cron.php
index ccac49b63..8b0fab77a 100644
--- a/include/cron.php
+++ b/include/cron.php
@@ -42,12 +42,6 @@ function cron_run(&$argv, &$argc){
 	// Expire and remove user entries
 	proc_run(PRIORITY_MEDIUM, "include/cronjobs.php", "expire_and_remove_users");
 
-	// Check OStatus conversations
-	proc_run(PRIORITY_MEDIUM, "include/cronjobs.php", "ostatus_mentions");
-
-	// Check every conversation
-	proc_run(PRIORITY_MEDIUM, "include/cronjobs.php", "ostatus_conversations");
-
 	// Call possible post update functions
 	proc_run(PRIORITY_LOW, "include/cronjobs.php", "post_update");
 
diff --git a/include/cronjobs.php b/include/cronjobs.php
index 53316e464..437fedd53 100644
--- a/include/cronjobs.php
+++ b/include/cronjobs.php
@@ -8,7 +8,6 @@ function cronjobs_run(&$argv, &$argc){
 	global $a;
 
 	require_once 'include/datetime.php';
-	require_once 'include/ostatus.php';
 	require_once 'include/post_update.php';
 	require_once 'mod/nodeinfo.php';
 	require_once 'include/photos.php';
@@ -22,19 +21,6 @@ function cronjobs_run(&$argv, &$argc){
 
 	logger("Starting cronjob ".$argv[1], LOGGER_DEBUG);
 
-	// Check OStatus conversations
-	// Check only conversations with mentions (for a longer time)
-	if ($argv[1] == 'ostatus_mentions') {
-		ostatus::check_conversations(true);
-		return;
-	}
-
-	// Check every conversation
-	if ($argv[1] == 'ostatus_conversations') {
-		ostatus::check_conversations(false);
-		return;
-	}
-
 	// Call possible post update functions
 	// see include/post_update.php for more details
 	if ($argv[1] == 'post_update') {
diff --git a/include/dfrn.php b/include/dfrn.php
index 4c8f828af..0b12f4d61 100644
--- a/include/dfrn.php
+++ b/include/dfrn.php
@@ -303,7 +303,7 @@ class dfrn {
 				AND (NOT `contact`.`blocked` OR `contact`.`pending`)
 			LEFT JOIN `sign` ON `sign`.`iid` = `item`.`id`
 			WHERE `item`.`id` = %d AND `item`.`visible` AND NOT `item`.`moderated` AND `item`.`parent` != 0
-			AND `item`.`wall` AND NOT `item`.`private`",
+			AND NOT `item`.`private`",
 			intval($item_id)
 		);
 
@@ -330,12 +330,9 @@ class dfrn {
 
 		$alternatelink = $owner['url'];
 
-		$root = self::add_header($doc, $owner, 'dfrn:owner', $alternatelink, true);
-
 		$type = 'html';
 
-		$entry = self::entry($doc, $type, $item, $owner, true);
-		$root->appendChild($entry);
+		$root = self::entry($doc, $type, $item, $owner, true, 0, true);
 
 		$atom = trim($doc->saveXML());
 		return $atom;
@@ -827,7 +824,7 @@ class dfrn {
 	 * @return object XML entry object
 	 * @todo Add type-hints
 	 */
-	private static function entry($doc, $type, $item, $owner, $comment = false, $cid = 0) {
+	private static function entry($doc, $type, $item, $owner, $comment = false, $cid = 0, $single = false) {
 
 		$mentioned = array();
 
@@ -840,7 +837,22 @@ class dfrn {
 			return xml::create_element($doc, "at:deleted-entry", "", $attributes);
 		}
 
-		$entry = $doc->createElement("entry");
+		if (!$single) {
+			$entry = $doc->createElement("entry");
+		} else {
+			$entry = $doc->createElementNS(NAMESPACE_ATOM1, 'entry');
+			$doc->appendChild($entry);
+
+			$entry->setAttribute("xmlns:thr", NAMESPACE_THREAD);
+			$entry->setAttribute("xmlns:at", NAMESPACE_TOMB);
+			$entry->setAttribute("xmlns:media", NAMESPACE_MEDIA);
+			$entry->setAttribute("xmlns:dfrn", NAMESPACE_DFRN);
+			$entry->setAttribute("xmlns:activity", NAMESPACE_ACTIVITY);
+			$entry->setAttribute("xmlns:georss", NAMESPACE_GEORSS);
+			$entry->setAttribute("xmlns:poco", NAMESPACE_POCO);
+			$entry->setAttribute("xmlns:ostatus", NAMESPACE_OSTATUS);
+			$entry->setAttribute("xmlns:statusnet", NAMESPACE_STATUSNET);
+		}
 
 		if ($item['allow_cid'] || $item['allow_gid'] || $item['deny_cid'] || $item['deny_gid']) {
 			$body = fix_private_photos($item['body'],$owner['uid'],$item,$cid);
@@ -868,10 +880,10 @@ class dfrn {
 		$entry->appendChild($dfrnowner);
 
 		if (($item['parent'] != $item['id']) || ($item['parent-uri'] !== $item['uri']) || (($item['thr-parent'] !== '') && ($item['thr-parent'] !== $item['uri']))) {
-			$parent = q("SELECT `guid` FROM `item` WHERE `id` = %d", intval($item["parent"]));
 			$parent_item = (($item['thr-parent']) ? $item['thr-parent'] : $item['parent-uri']);
+			$parent = q("SELECT `guid`,`plink` FROM `item` WHERE `uri` = '%s' AND `uid` = %d", dbesc($parent_item), intval($item['uid']));
 			$attributes = array("ref" => $parent_item, "type" => "text/html",
-						"href" => System::baseUrl().'/display/'.$parent[0]['guid'],
+						"href" => $parent[0]['plink'],
 						"dfrn:diaspora_guid" => $parent[0]['guid']);
 			xml::add_element($doc, $entry, "thr:in-reply-to", "", $attributes);
 		}
diff --git a/include/ostatus.php b/include/ostatus.php
index 1f81d9615..124f421bf 100644
--- a/include/ostatus.php
+++ b/include/ostatus.php
@@ -33,6 +33,516 @@ class ostatus {
 	const OSTATUS_DEFAULT_POLL_TIMEFRAME = 1440; // given in minutes
 	const OSTATUS_DEFAULT_POLL_TIMEFRAME_MENTIONS = 14400; // given in minutes
 
+        private static $itemlist;
+
+        /**
+         * @brief Imports an XML string containing OStatus elements
+         *
+         * @param string $xml The XML
+         * @param array $importer user record of the importing user
+         * @param $contact
+         * @param array $hub Called by reference, returns the fetched hub data
+         */
+	public static function import($xml, $importer, &$contact, &$hub) {
+		self::process($xml, $importer, $contact, $hub);
+	}
+
+        /**
+         * @brief Imports an XML string containing OStatus elements
+         *
+         * @param string $xml The XML
+         * @param array $importer user record of the importing user
+         * @param $contact
+         * @param array $hub Called by reference, returns the fetched hub data
+         */
+	private static function process($xml, $importer, &$contact, &$hub, $stored = false, $initialize = true) {
+		if ($initialize) {
+			self::$itemlist = array();
+		}
+
+		logger("Import OStatus message", LOGGER_DEBUG);
+
+		if ($xml == "") {
+			return false;
+		}
+		$doc = new DOMDocument();
+		@$doc->loadXML($xml);
+
+		$xpath = new DomXPath($doc);
+		$xpath->registerNamespace('atom', NAMESPACE_ATOM1);
+		$xpath->registerNamespace('thr', NAMESPACE_THREAD);
+		$xpath->registerNamespace('georss', NAMESPACE_GEORSS);
+		$xpath->registerNamespace('activity', NAMESPACE_ACTIVITY);
+		$xpath->registerNamespace('media', NAMESPACE_MEDIA);
+		$xpath->registerNamespace('poco', NAMESPACE_POCO);
+		$xpath->registerNamespace('ostatus', NAMESPACE_OSTATUS);
+		$xpath->registerNamespace('statusnet', NAMESPACE_STATUSNET);
+
+                $hub = "";
+                $hub_attributes = $xpath->query("/atom:feed/atom:link[@rel='hub']")->item(0)->attributes;
+                if (is_object($hub_attributes)) {
+                        foreach ($hub_attributes AS $hub_attribute) {
+                                if ($hub_attribute->name == "href") {
+                                        $hub = $hub_attribute->textContent;
+                                        logger("Found hub ".$hub, LOGGER_DEBUG);
+                                }
+                        }
+                }
+
+		$header = array();
+		$header["uid"] = $importer["uid"];
+		$header["network"] = NETWORK_OSTATUS;
+		$header["type"] = "remote";
+		$header["wall"] = 0;
+		$header["origin"] = 0;
+		$header["gravity"] = GRAVITY_PARENT;
+
+		$first_child = $doc->firstChild->tagName;
+
+		if ($first_child == "feed") {
+			$entries = $xpath->query('/atom:feed/atom:entry');
+			$header["protocol"] = PROTOCOL_OSTATUS_FEED;
+		} else {
+			$entries = $xpath->query('/atom:entry');
+			$header["protocol"] = PROTOCOL_OSTATUS_SALMON;
+		}
+
+		// Fetch the first author
+		$authordata = $xpath->query('//author')->item(0);
+		$author = self::fetchauthor($xpath, $authordata, $importer, $contact, $stored);
+
+		$entry = $xpath->query('/atom:entry');
+		$header["protocol"] = PROTOCOL_OSTATUS_SALMON;
+
+		// Reverse the order of the entries
+		$entrylist = array();
+
+		foreach ($entries AS $entry) {
+			$entrylist[] = $entry;
+		}
+
+		if (!$initialize && (count($entrylist) > 1)) {
+			return false;
+		}
+
+		foreach (array_reverse($entrylist) AS $entry) {
+			// fetch the author
+			$authorelement = $xpath->query('/atom:entry/atom:author', $entry);
+			if ($authorelement->length > 0) {
+				$author = self::fetchauthor($xpath, $entry, $importer, $contact, $stored);
+			}
+
+			$value = $xpath->evaluate('atom:author/poco:preferredUsername/text()', $entry)->item(0)->nodeValue;
+			if ($value != "") {
+				$nickname = $value;
+			} else {
+				$nickname = $author["author-name"];
+			}
+
+			$item = array_merge($header, $author);
+
+			$item["verb"] = $xpath->query('activity:verb/text()', $entry)->item(0)->nodeValue;
+
+			/// Delete a message
+			if ($item["verb"] == "qvitter-delete-notice" || $item["verb"] == ACTIVITY_DELETE) {
+				// ignore "Delete" messages (by now)
+				logger("Ignore delete message ".print_r($item, true));
+				continue;
+			}
+
+			if ($item["verb"] == ACTIVITY_JOIN) {
+				// ignore "Join" messages
+				logger("Ignore join message ".print_r($item, true));
+				continue;
+			}
+
+			if ($item["verb"] == ACTIVITY_FOLLOW) {
+				new_follower($importer, $contact, $item, $nickname);
+				continue;
+			}
+
+			if ($item["verb"] == NAMESPACE_OSTATUS."/unfollow") {
+				lose_follower($importer, $contact, $item, $dummy);
+				continue;
+			}
+
+			if ($item["verb"] == NAMESPACE_OSTATUS."/unfavorite") {
+				// Ignore "Unfavorite" message
+				logger("Ignore unfavorite message ".print_r($item, true));
+				continue;
+			}
+
+			if ($item["verb"] == ACTIVITY_FAVORITE) {
+				$orig_uri = $xpath->query("activity:object/atom:id", $entry)->item(0)->nodeValue;
+				logger("Favorite ".$orig_uri." ".print_r($item, true));
+
+				$item["verb"] = ACTIVITY_LIKE;
+				$item["parent-uri"] = $orig_uri;
+				$item["gravity"] = GRAVITY_LIKE;
+			}
+
+			// http://activitystrea.ms/schema/1.0/rsvp-yes
+			if (!in_array($item["verb"], array(ACTIVITY_POST, ACTIVITY_LIKE, ACTIVITY_SHARE))) {
+				logger("Unhandled verb ".$item["verb"]." ".print_r($item, true));
+			}
+
+			$doc2 = new DOMDocument();
+			$doc2->loadXML($xml);
+			$doc2->preserveWhiteSpace = false;
+			$doc2->formatOutput = true;
+			$xml2 = $doc2->saveXML();
+
+			$item["source"] = $xml2;
+
+			self::processPost($xpath, $entry, $item, $importer);
+
+			if ($initialize && (count(self::$itemlist) > 0)) {
+				// We will import it everytime, when it is started by our contacts
+				$valid = !empty(self::$itemlist[0]['contact-id']);
+				if (!$valid) {
+					// If not, then it depends on this setting
+					$valid = !Config::get('system','ostatus_full_threads');
+				}
+
+				if ($valid) {
+					// But we will only import complete threads
+					$valid = self::$itemlist[0]['uri'] == self::$itemlist[0]['parent-uri'];
+				}
+
+				if ($valid) {
+					// Never post a thread when the only interaction by our contact was a like
+					$valid = false;
+					$verbs = array(ACTIVITY_POST, ACTIVITY_SHARE);
+					foreach (self::$itemlist AS $item) {
+						if (!empty($item['contact-id']) && in_array($item['verb'], $verbs)) {
+							$valid = true;
+						}
+					}
+				}
+
+				if ($valid) {
+					$default_contact = 0;
+					$key = count(self::$itemlist);
+					for ($key = count(self::$itemlist) - 1; $key >= 0; $key--) {
+						if (empty(self::$itemlist[$key]['contact-id'])) {
+							self::$itemlist[$key]['contact-id'] = $default_contact;
+						} else {
+							$default_contact = $item['contact-id'];
+						}
+					}
+					foreach (self::$itemlist AS $item) {
+						$found = dba::exists('item', array('uid' => $importer["uid"], 'uri' => $item["uri"]));
+						if ($found) {
+			                                logger("Item with uri ".$item["uri"]." for user ".$importer["uid"]." already exists.", LOGGER_DEBUG);
+						} else {
+							$ret = item_store($item);
+							logger('Item was stored with return value '.$ret);
+						}
+					}
+				}
+				self::$itemlist = array();
+			}
+		}
+		return true;
+	}
+
+	private static function processPost($xpath, $entry, &$item, $importer) {
+		$item["uri"] = $xpath->query('atom:id/text()', $entry)->item(0)->nodeValue;
+		$item["body"] = html2bbcode($xpath->query('atom:content/text()', $entry)->item(0)->nodeValue);
+		$item["object-type"] = $xpath->query('activity:object-type/text()', $entry)->item(0)->nodeValue;
+		if (($item["object-type"] == ACTIVITY_OBJ_BOOKMARK) || ($item["object-type"] == ACTIVITY_OBJ_EVENT)) {
+			$item["title"] = $xpath->query('atom:title/text()', $entry)->item(0)->nodeValue;
+			$item["body"] = $xpath->query('atom:summary/text()', $entry)->item(0)->nodeValue;
+		} elseif ($item["object-type"] == ACTIVITY_OBJ_QUESTION) {
+			$item["title"] = $xpath->query('atom:title/text()', $entry)->item(0)->nodeValue;
+		}
+
+		$item["created"] = $xpath->query('atom:published/text()', $entry)->item(0)->nodeValue;
+		$item["edited"] = $xpath->query('atom:updated/text()', $entry)->item(0)->nodeValue;
+		$conversation = $xpath->query('ostatus:conversation/text()', $entry)->item(0)->nodeValue;
+		$item['conversation-uri'] = $conversation;
+
+		$conv = $xpath->query('ostatus:conversation', $entry);
+		if (is_object($conv->item(0))) {
+			foreach ($conv->item(0)->attributes AS $attributes) {
+				if ($attributes->name == "ref") {
+					$item['conversation-uri'] = $attributes->textContent;
+				}
+				if ($attributes->name == "href") {
+					$item['conversation-href'] = $attributes->textContent;
+				}
+			}
+		}
+
+		if (empty($item['conversation-href']) && !empty($item['conversation-uri'])) {
+			$item['conversation-href'] =  $item['conversation-uri'];
+		}
+
+		$related = "";
+
+		$inreplyto = $xpath->query('thr:in-reply-to', $entry);
+		if (is_object($inreplyto->item(0))) {
+			foreach ($inreplyto->item(0)->attributes AS $attributes) {
+				if ($attributes->name == "ref") {
+					$item["parent-uri"] = $attributes->textContent;
+				}
+				if ($attributes->name == "href") {
+					$related = $attributes->textContent;
+				}
+			}
+		}
+
+		$georsspoint = $xpath->query('georss:point', $entry);
+		if (!empty($georsspoint) && ($georsspoint->length > 0)) {
+			$item["coord"] = $georsspoint->item(0)->nodeValue;
+		}
+
+		$categories = $xpath->query('atom:category', $entry);
+		if ($categories) {
+			foreach ($categories AS $category) {
+				foreach ($category->attributes AS $attributes) {
+					if ($attributes->name == "term") {
+						$term = $attributes->textContent;
+						if (strlen($item["tag"])) {
+							$item["tag"] .= ',';
+						}
+						$item["tag"] .= "#[url=".System::baseUrl()."/search?tag=".$term."]".$term."[/url]";
+					}
+				}
+			}
+		}
+
+		$self = '';
+		$add_body = '';
+
+		$links = $xpath->query('atom:link', $entry);
+		if ($links) {
+			$link_data = self::processLinks($links, $item);
+			$self = $link_data['self'];
+			$add_body = $link_data['add_body'];
+		}
+
+		$repeat_of = "";
+
+		$notice_info = $xpath->query('statusnet:notice_info', $entry);
+		if ($notice_info && ($notice_info->length > 0)) {
+			foreach ($notice_info->item(0)->attributes AS $attributes) {
+				if ($attributes->name == "source") {
+					$item["app"] = strip_tags($attributes->textContent);
+				}
+				if ($attributes->name == "repeat_of") {
+					$repeat_of = $attributes->textContent;
+				}
+			}
+		}
+		// Is it a repeated post?
+		if (($repeat_of != "") || ($item["verb"] == ACTIVITY_SHARE)) {
+			$link_data = self::processRepeatedItem($xpath, $entry, $item, $importer);
+			if (!empty($link_data['add_body'])) {
+				$add_body .= $link_data['add_body'];
+			}
+		}
+
+		$item["body"] .= $add_body;
+
+		// Only add additional data when there is no picture in the post
+		if (!strstr($item["body"],'[/img]')) {
+			$item["body"] = add_page_info_to_body($item["body"]);
+		}
+
+		// Mastodon Content Warning
+		if (($item["verb"] == ACTIVITY_POST) && $xpath->evaluate('boolean(atom:summary)', $entry)) {
+			$clear_text = $xpath->query('atom:summary/text()', $entry)->item(0)->nodeValue;
+
+			$item["body"] = html2bbcode($clear_text) . '[spoiler]' . $item["body"] . '[/spoiler]';
+		}
+
+		if (isset($item["parent-uri"]) && ($related != '')) {
+			self::FetchRelated($related, $item["parent-uri"], $importer);
+			$item["type"] = 'remote-comment';
+			$item["gravity"] = GRAVITY_COMMENT;
+		} else {
+			$item["parent-uri"] = $item["uri"];
+		}
+
+		if ($item['author-link'] != '') {
+			$item = store_conversation($item);
+		}
+
+		self::$itemlist[] = $item;
+	}
+
+	private static function fetchRelated($related, $related_uri, $importer) {
+		$condition = array('`item-uri` = ? AND `protocol` IN (?, ?)', $related_uri, PROTOCOL_DFRN, PROTOCOL_OSTATUS_SALMON);
+		$conversation = dba::select('conversation', array('source', 'protocol'), $condition,  array('limit' => 1));
+		if (dbm::is_result($conversation)) {
+			$stored = true;
+			$xml = $conversation['source'];
+			if (self::process($xml, $importer, $contact, $hub, $stored, false)) {
+				return;
+			}
+			if ($conversation['protocol'] == PROTOCOL_OSTATUS_SALMON) {
+				dba::delete('conversation', array('item-uri' => $related_uri));
+			}
+		}
+
+		$stored = false;
+		$related_data = z_fetch_url($related);
+
+		if (!$related_data['success']) {
+			return;
+		}
+
+		$xml = '';
+
+		if (stristr($related_data['header'], 'Content-Type: application/atom+xml')) {
+			$xml = $related_data['body'];
+		}
+
+		if ($xml == '') {
+			$doc = new DOMDocument();
+			if (!@$doc->loadHTML($related_data['body'])) {
+				return;
+			}
+			$xpath = new DomXPath($doc);
+
+			$links = $xpath->query('//link');
+			if ($links) {
+				foreach ($links AS $link) {
+					$attribute = self::read_attributes($link);
+					if (($attribute['rel'] == 'alternate') && ($attribute['type'] == 'application/atom+xml')) {
+						$related_atom = z_fetch_url($attribute['href']);
+
+						if ($related_atom['success']) {
+							$xml = $related_atom['body'];
+						}
+					}
+				}
+			}
+		}
+
+		// Workaround for older GNU Social servers
+		if (($xml == '') && strstr($related, '/notice/')) {
+			$related_atom = z_fetch_url(str_replace('/notice/', '/api/statuses/show/', $related).',atom');
+
+			if ($related_atom['success']) {
+				$xml = $related_atom['body'];
+			}
+		}
+
+		if ($xml != '') {
+			self::process($xml, $importer, $contact, $hub, $stored, false);
+		}
+		return;
+	}
+
+	private static function processRepeatedItem($xpath, $entry, &$item, $importer) {
+		$activityobjects = $xpath->query('activity:object', $entry)->item(0);
+
+		if (!is_object($activityobjects)) {
+			return array();
+		}
+
+		$link_data = array();
+
+		$orig_uri = $xpath->query('atom:id/text()', $activityobjects)->item(0)->nodeValue;
+
+		$links = $xpath->query("atom:link", $activityobjects);
+		if ($links) {
+			$link_data = self::processLinks($links, $item);
+		}
+
+		$orig_body = $xpath->query('atom:content/text()', $activityobjects)->item(0)->nodeValue;
+		$orig_created = $xpath->query('atom:published/text()', $activityobjects)->item(0)->nodeValue;
+		$orig_edited = $xpath->query('atom:updated/text()', $activityobjects)->item(0)->nodeValue;
+
+		$orig_contact = $contact;
+		$orig_author = self::fetchauthor($xpath, $activityobjects, $importer, $orig_contact, false);
+
+		$item["author-name"] = $orig_author["author-name"];
+		$item["author-link"] = $orig_author["author-link"];
+		$item["author-avatar"] = $orig_author["author-avatar"];
+
+		$item["body"] = html2bbcode($orig_body);
+		$item["created"] = $orig_created;
+		$item["edited"] = $orig_edited;
+
+		$item["uri"] = $orig_uri;
+
+		$item["verb"] = $xpath->query('activity:verb/text()', $activityobjects)->item(0)->nodeValue;
+
+		$item["object-type"] = $xpath->query('activity:object-type/text()', $activityobjects)->item(0)->nodeValue;
+
+		$inreplyto = $xpath->query('thr:in-reply-to', $activityobjects);
+		if (is_object($inreplyto->item(0))) {
+			foreach ($inreplyto->item(0)->attributes AS $attributes) {
+				if ($attributes->name == "ref") {
+					$item["parent-uri"] = $attributes->textContent;
+				}
+			}
+		}
+
+		return $link_data;
+	}
+
+	private static function processLinks($links, &$item) {
+		$link_data = array('add_body' => '', 'self' => '');
+
+		foreach ($links AS $link) {
+			$attribute = self::read_attributes($link);
+
+			if (($attribute['rel'] != "") && ($attribute['href'] != "")) {
+				switch ($attribute['rel']) {
+					case "alternate":
+						$item["plink"] = $attribute['href'];
+						if (($item["object-type"] == ACTIVITY_OBJ_QUESTION) ||
+							($item["object-type"] == ACTIVITY_OBJ_EVENT)) {
+							$item["body"] .= add_page_info($attribute['href']);
+						}
+						break;
+					case "ostatus:conversation":
+						$link_data['conversation'] = $attribute['href'];
+						$item['conversation-href'] = $link_data['conversation'];
+						if (!isset($item['conversation-uri'])) {
+							$item['conversation-uri'] = $item['conversation-href'];
+						}
+						break;
+					case "enclosure":
+						$filetype = strtolower(substr($attribute['type'], 0, strpos($attribute['type'],'/')));
+						if ($filetype == 'image') {
+							$link_data['add_body'] .= "\n[img]".$attribute['href'].'[/img]';
+						} else {
+							if (strlen($item["attach"])) {
+								$item["attach"] .= ',';
+							}
+							if (!isset($attribute['length'])) {
+								$attribute['length'] = "0";
+							}
+							$item["attach"] .= '[attach]href="'.$attribute['href'].'" length="'.$attribute['length'].'" type="'.$attribute['type'].'" title="'.$attribute['title'].'"[/attach]';
+						}
+						break;
+					case "related":
+						if ($item["object-type"] != ACTIVITY_OBJ_BOOKMARK) {
+							if (!isset($item["parent-uri"])) {
+								$item["parent-uri"] = $attribute['href'];
+							}
+							$link_data['related'] = $attribute['href'];
+						} else {
+							$item["body"] .= add_page_info($attribute['href']);
+						}
+						break;
+					case "self":
+						if ($item["plink"] == '') {
+							$item["plink"] = $attribute['href'];
+						}
+						$link_data['self'] = $attribute['href'];
+						break;
+				}
+			}
+		}
+		return $link_data;
+	}
+
 	/**
 	 * @brief Fetches author data
 	 *
@@ -252,1119 +762,6 @@ class ostatus {
 		return $attribute;
 	}
 
-	/**
-	 * @brief Imports an XML string containing OStatus elements
-	 *
-	 * @param string $xml The XML
-	 * @param array $importer user record of the importing user
-	 * @param $contact
-	 * @param array $hub Called by reference, returns the fetched hub data
-	 */
-	public static function import($xml,$importer,&$contact, &$hub) {
-		/// @todo this function is too long. It has to be split in many parts
-
-		logger("Import OStatus message", LOGGER_DEBUG);
-
-		if ($xml == "") {
-			return;
-		}
-		//$tempfile = tempnam(get_temppath(), "import");
-		//file_put_contents($tempfile, $xml);
-
-		$doc = new DOMDocument();
-		@$doc->loadXML($xml);
-
-		$xpath = new DomXPath($doc);
-		$xpath->registerNamespace('atom', NAMESPACE_ATOM1);
-		$xpath->registerNamespace('thr', NAMESPACE_THREAD);
-		$xpath->registerNamespace('georss', NAMESPACE_GEORSS);
-		$xpath->registerNamespace('activity', NAMESPACE_ACTIVITY);
-		$xpath->registerNamespace('media', NAMESPACE_MEDIA);
-		$xpath->registerNamespace('poco', NAMESPACE_POCO);
-		$xpath->registerNamespace('ostatus', NAMESPACE_OSTATUS);
-		$xpath->registerNamespace('statusnet', NAMESPACE_STATUSNET);
-
-		$gub = "";
-		$hub_attributes = $xpath->query("/atom:feed/atom:link[@rel='hub']")->item(0)->attributes;
-		if (is_object($hub_attributes)) {
-			foreach ($hub_attributes AS $hub_attribute) {
-				if ($hub_attribute->name == "href") {
-					$hub = $hub_attribute->textContent;
-					logger("Found hub ".$hub, LOGGER_DEBUG);
-				}
-			}
-		}
-		$header = array();
-		$header["uid"] = $importer["uid"];
-		$header["network"] = NETWORK_OSTATUS;
-		$header["type"] = "remote";
-		$header["wall"] = 0;
-		$header["origin"] = 0;
-		$header["gravity"] = GRAVITY_PARENT;
-
-		// it could either be a received post or a post we fetched by ourselves
-		// depending on that, the first node is different
-		$first_child = $doc->firstChild->tagName;
-
-		if ($first_child == "feed") {
-			$entries = $xpath->query('/atom:feed/atom:entry');
-			$header["protocol"] = PROTOCOL_OSTATUS_FEED;
-		} else {
-			$entries = $xpath->query('/atom:entry');
-			$header["protocol"] = PROTOCOL_OSTATUS_SALMON;
-		}
-		$conversation = "";
-		$conversationlist = array();
-		$item_id = 0;
-
-		// Reverse the order of the entries
-		$entrylist = array();
-
-		foreach ($entries AS $entry) {
-			$entrylist[] = $entry;
-		}
-		foreach (array_reverse($entrylist) AS $entry) {
-
-			$mention = false;
-
-			// fetch the author
-			if ($first_child == "feed") {
-				$author = self::fetchauthor($xpath, $doc->firstChild, $importer, $contact, false);
-			} else {
-				$author = self::fetchauthor($xpath, $entry, $importer, $contact, false);
-			}
-			$value = $xpath->evaluate('atom:author/poco:preferredUsername/text()', $context)->item(0)->nodeValue;
-			if ($value != "") {
-				$nickname = $value;
-			} else {
-				$nickname = $author["author-name"];
-			}
-			$item = array_merge($header, $author);
-
-			// Now get the item
-			$item["uri"] = $xpath->query('atom:id/text()', $entry)->item(0)->nodeValue;
-
-			$r = q("SELECT `id` FROM `item` WHERE `uid` = %d AND `uri` = '%s'",
-				intval($importer["uid"]), dbesc($item["uri"]));
-			if (dbm::is_result($r)) {
-				logger("Item with uri ".$item["uri"]." for user ".$importer["uid"]." already existed under id ".$r[0]["id"], LOGGER_DEBUG);
-				continue;
-			}
-
-			$item["body"] = html2bbcode($xpath->query('atom:content/text()', $entry)->item(0)->nodeValue);
-			$item["object-type"] = $xpath->query('activity:object-type/text()', $entry)->item(0)->nodeValue;
-			$item["verb"] = $xpath->query('activity:verb/text()', $entry)->item(0)->nodeValue;
-
-			if (($item["object-type"] == ACTIVITY_OBJ_BOOKMARK) || ($item["object-type"] == ACTIVITY_OBJ_EVENT)) {
-				$item["title"] = $xpath->query('atom:title/text()', $entry)->item(0)->nodeValue;
-				$item["body"] = $xpath->query('atom:summary/text()', $entry)->item(0)->nodeValue;
-			} elseif ($item["object-type"] == ACTIVITY_OBJ_QUESTION) {
-				$item["title"] = $xpath->query('atom:title/text()', $entry)->item(0)->nodeValue;
-			}
-			$item["source"] = $xml;
-
-			/// @TODO
-			/// Delete a message
-			if ($item["verb"] == "qvitter-delete-notice" || $item["verb"] == ACTIVITY_DELETE) {
-				// ignore "Delete" messages (by now)
-				logger("Ignore delete message ".print_r($item, true));
-				continue;
-			}
-
-			if ($item["verb"] == ACTIVITY_JOIN) {
-				// ignore "Join" messages
-				logger("Ignore join message ".print_r($item, true));
-				continue;
-			}
-
-			if ($item["verb"] == ACTIVITY_FOLLOW) {
-				new_follower($importer, $contact, $item, $nickname);
-				continue;
-			}
-
-			if ($item["verb"] == NAMESPACE_OSTATUS."/unfollow") {
-				lose_follower($importer, $contact, $item, $dummy);
-				continue;
-			}
-
-			if ($item["verb"] == ACTIVITY_FAVORITE) {
-				$orig_uri = $xpath->query("activity:object/atom:id", $entry)->item(0)->nodeValue;
-				logger("Favorite ".$orig_uri." ".print_r($item, true));
-
-				$item["verb"] = ACTIVITY_LIKE;
-				$item["parent-uri"] = $orig_uri;
-				$item["gravity"] = GRAVITY_LIKE;
-			}
-
-			if ($item["verb"] == NAMESPACE_OSTATUS."/unfavorite") {
-				// Ignore "Unfavorite" message
-				logger("Ignore unfavorite message ".print_r($item, true));
-				continue;
-			}
-
-			// http://activitystrea.ms/schema/1.0/rsvp-yes
-			if (!in_array($item["verb"], array(ACTIVITY_POST, ACTIVITY_LIKE, ACTIVITY_SHARE))) {
-				logger("Unhandled verb ".$item["verb"]." ".print_r($item, true));
-			}
-			$item["created"] = $xpath->query('atom:published/text()', $entry)->item(0)->nodeValue;
-			$item["edited"] = $xpath->query('atom:updated/text()', $entry)->item(0)->nodeValue;
-			$conversation = $xpath->query('ostatus:conversation/text()', $entry)->item(0)->nodeValue;
-			$item['conversation-uri'] = $conversation;
-
-			$conv = $xpath->query('ostatus:conversation', $entry);
-			if (is_object($conv->item(0))) {
-				foreach ($conv->item(0)->attributes AS $attributes) {
-					if ($attributes->name == "ref") {
-						$item['conversation-uri'] = $attributes->textContent;
-					}
-					if ($attributes->name == "href") {
-						$item['conversation-href'] = $attributes->textContent;
-					}
-				}
-			}
-
-			$related = "";
-
-			$inreplyto = $xpath->query('thr:in-reply-to', $entry);
-			if (is_object($inreplyto->item(0))) {
-				foreach ($inreplyto->item(0)->attributes AS $attributes) {
-					if ($attributes->name == "ref") {
-						$item["parent-uri"] = $attributes->textContent;
-					}
-					if ($attributes->name == "href") {
-						$related = $attributes->textContent;
-					}
-				}
-			}
-
-			$georsspoint = $xpath->query('georss:point', $entry);
-			if ($georsspoint) {
-				$item["coord"] = $georsspoint->item(0)->nodeValue;
-			}
-			$categories = $xpath->query('atom:category', $entry);
-			if ($categories) {
-				foreach ($categories AS $category) {
-					foreach ($category->attributes AS $attributes) {
-						if ($attributes->name == "term") {
-							$term = $attributes->textContent;
-							if (strlen($item["tag"])) {
-								$item["tag"] .= ',';
-							}
-							$item["tag"] .= "#[url=".System::baseUrl()."/search?tag=".$term."]".$term."[/url]";
-						}
-					}
-				}
-			}
-
-			$self = "";
-
-			$add_body = "";
-
-			$links = $xpath->query('atom:link', $entry);
-			if ($links) {
-				foreach ($links AS $link) {
-					$attribute = self::read_attributes($link);
-
-					if (($attribute['rel'] != "") && ($attribute['href'] != "")) {
-						switch ($attribute['rel']) {
-							case "alternate":
-								$item["plink"] = $attribute['href'];
-								if (($item["object-type"] == ACTIVITY_OBJ_QUESTION) ||
-									($item["object-type"] == ACTIVITY_OBJ_EVENT)) {
-									$item["body"] .= add_page_info($attribute['href']);
-								}
-								break;
-							case "ostatus:conversation":
-								$conversation = $attribute['href'];
-								$item['conversation-href'] = $conversation;
-								if (!isset($item['conversation-uri'])) {
-									$item['conversation-uri'] = $item['conversation-href'];
-								}
-								break;
-							case "enclosure":
-								$filetype = strtolower(substr($attribute['type'], 0, strpos($attribute['type'],'/')));
-								if ($filetype == 'image') {
-									$add_body .= "\n[img]".$attribute['href'].'[/img]';
-								} else {
-									if (strlen($item["attach"])) {
-										$item["attach"] .= ',';
-									}
-									if (!isset($attribute['length'])) {
-										$attribute['length'] = "0";
-									}
-									$item["attach"] .= '[attach]href="'.$attribute['href'].'" length="'.$attribute['length'].'" type="'.$attribute['type'].'" title="'.$attribute['title'].'"[/attach]';
-								}
-								break;
-							case "related":
-								if ($item["object-type"] != ACTIVITY_OBJ_BOOKMARK) {
-									if (!isset($item["parent-uri"])) {
-										$item["parent-uri"] = $attribute['href'];
-									}
-									if ($related == "") {
-										$related = $attribute['href'];
-									}
-								} else {
-									$item["body"] .= add_page_info($attribute['href']);
-								}
-								break;
-							case "self":
-								$self = $attribute['href'];
-								break;
-							case "mentioned":
-								// Notification check
-								if ($importer["nurl"] == normalise_link($attribute['href'])) {
-									$mention = true;
-								}
-								break;
-						}
-					}
-				}
-			}
-
-			$local_id = "";
-			$repeat_of = "";
-
-			$notice_info = $xpath->query('statusnet:notice_info', $entry);
-			if ($notice_info && ($notice_info->length > 0)) {
-				foreach ($notice_info->item(0)->attributes AS $attributes) {
-					if ($attributes->name == "source") {
-						$item["app"] = strip_tags($attributes->textContent);
-					}
-					if ($attributes->name == "local_id") {
-						$local_id = $attributes->textContent;
-					}
-					if ($attributes->name == "repeat_of") {
-						$repeat_of = $attributes->textContent;
-					}
-				}
-			}
-
-			// Is it a repeated post?
-			if (($repeat_of != "") || ($item["verb"] == ACTIVITY_SHARE)) {
-				$activityobjects = $xpath->query('activity:object', $entry)->item(0);
-
-				if (is_object($activityobjects)) {
-
-					$orig_uri = $xpath->query("activity:object/atom:id", $activityobjects)->item(0)->nodeValue;
-					if (!isset($orig_uri)) {
-						$orig_uri = $xpath->query('atom:id/text()', $activityobjects)->item(0)->nodeValue;
-					}
-					$orig_links = $xpath->query("activity:object/atom:link[@rel='alternate']", $activityobjects);
-					if ($orig_links && ($orig_links->length > 0)) {
-						foreach ($orig_links->item(0)->attributes AS $attributes) {
-							if ($attributes->name == "href") {
-								$orig_link = $attributes->textContent;
-							}
-						}
-					}
-					if (!isset($orig_link)) {
-						$orig_link = $xpath->query("atom:link[@rel='alternate']", $activityobjects)->item(0)->nodeValue;
-					}
-					if (!isset($orig_link)) {
-						$orig_link =  self::convert_href($orig_uri);
-					}
-					$orig_body = $xpath->query('activity:object/atom:content/text()', $activityobjects)->item(0)->nodeValue;
-					if (!isset($orig_body)) {
-						$orig_body = $xpath->query('atom:content/text()', $activityobjects)->item(0)->nodeValue;
-					}
-					$orig_created = $xpath->query('atom:published/text()', $activityobjects)->item(0)->nodeValue;
-					$orig_edited = $xpath->query('atom:updated/text()', $activityobjects)->item(0)->nodeValue;
-
-					$orig_contact = $contact;
-					$orig_author = self::fetchauthor($xpath, $activityobjects, $importer, $orig_contact, false);
-
-					$item["author-name"] = $orig_author["author-name"];
-					$item["author-link"] = $orig_author["author-link"];
-					$item["author-avatar"] = $orig_author["author-avatar"];
-
-					$item["body"] = html2bbcode($orig_body);
-					$item["created"] = $orig_created;
-					$item["edited"] = $orig_edited;
-
-					$item["uri"] = $orig_uri;
-
-					if (!isset($item["plink"])) {
-						$item["plink"] = $orig_link;
-					}
-
-					$item["verb"] = $xpath->query('activity:verb/text()', $activityobjects)->item(0)->nodeValue;
-
-					$item["object-type"] = $xpath->query('activity:object/activity:object-type/text()', $activityobjects)->item(0)->nodeValue;
-					if (!isset($item["object-type"])) {
-						$item["object-type"] = $xpath->query('activity:object-type/text()', $activityobjects)->item(0)->nodeValue;
-					}
-
-					$enclosures = $xpath->query("atom:link[@rel='alternate']", $activityobjects);
-					if ($enclosures) {
-						foreach ($enclosures AS $link) {
-							$attribute = self::read_attributes($link);
-							if ($href != "") {
-								if (strlen($item["attach"])) {
-									$item["attach"] .= ',';
-								}
-								if (!isset($attribute['length'])) {
-									$attribute['length'] = "0";
-								}
-								$item["attach"] .= '[attach]href="'.$attribute['href'].'" length="'.$attribute['length'].'" type="'.$attribute['type'].'" title="'.$attribute['title'].'"[/attach]';
-							}
-						}
-					}
-				}
-			}
-
-			$item["body"] .= $add_body;
-
-			// Only add additional data when there is no picture in the post
-			if (!strstr($item["body"],'[/img]')) {
-				$item["body"] = add_page_info_to_body($item["body"]);
-			}
-
-			// Mastodon Content Warning
-			if (($item["verb"] == ACTIVITY_POST) && $xpath->evaluate('boolean(atom:summary)', $entry)) {
-				$clear_text = $xpath->query('atom:summary/text()', $entry)->item(0)->nodeValue;
-
-				$item["body"] = html2bbcode($clear_text) . '[spoiler]' . $item["body"] . '[/spoiler]';
-			}
-
-			if (isset($item["parent-uri"])) {
-				$r = q("SELECT `id` FROM `item` WHERE `uid` = %d AND `uri` = '%s'",
-					intval($importer["uid"]), dbesc($item["parent-uri"]));
-
-				// Only fetch missing stuff if it is a comment or reshare.
-				if (in_array($item["verb"], array(ACTIVITY_POST, ACTIVITY_SHARE)) &&
-					!dbm::is_result($r) && ($related != "")) {
-					$reply_path = str_replace("/notice/", "/api/statuses/show/", $related).".atom";
-
-					if ($reply_path != $related) {
-						logger("Fetching related items for user ".$importer["uid"]." from ".$reply_path, LOGGER_DEBUG);
-						$reply_xml = fetch_url($reply_path);
-
-						$reply_contact = $contact;
-						self::import($reply_xml,$importer,$reply_contact, $reply_hub);
-
-						// After the import try to fetch the parent item again
-						$r = q("SELECT `id` FROM `item` WHERE `uid` = %d AND `uri` = '%s'",
-							intval($importer["uid"]), dbesc($item["parent-uri"]));
-					}
-				}
-				if (dbm::is_result($r)) {
-					$item["type"] = 'remote-comment';
-					$item["gravity"] = GRAVITY_COMMENT;
-				}
-			} else {
-				$item["parent-uri"] = $item["uri"];
-			}
-			$item_id = self::completion($conversation, $importer["uid"], $item, $self);
-
-			if (!$item_id) {
-				// Store the conversation data. This is normally done in "item_store"
-				// but since something went wrong, we want to be sure to save the data.
-				store_conversation($item);
-				logger("Error storing item", LOGGER_DEBUG);
-				continue;
-			}
-
-			logger("Item was stored with id ".$item_id, LOGGER_DEBUG);
-		}
-	}
-
-	/**
-	 * @brief Create an url out of an uri
-	 *
-	 * @param string $href URI in the format "parameter1:parameter1:..."
-	 *
-	 * @return string URL in the format http(s)://....
-	 */
-	public static function convert_href($href) {
-		$elements = explode(":",$href);
-
-		if ((count($elements) <= 2) || ($elements[0] != "tag"))
-			return $href;
-
-		$server = explode(",", $elements[1]);
-		$conversation = explode("=", $elements[2]);
-
-		if ((count($elements) == 4) && ($elements[2] == "post"))
-			return "http://".$server[0]."/notice/".$elements[3];
-
-		if ((count($conversation) != 2) || ($conversation[1] =="")) {
-			return $href;
-		}
-		if ($elements[3] == "objectType=thread") {
-			return "http://".$server[0]."/conversation/".$conversation[1];
-		} else {
-			return "http://".$server[0]."/notice/".$conversation[1];
-		}
-		return $href;
-	}
-
-	/**
-	 * @brief Checks if there are entries in conversations that aren't present on our side
-	 *
-	 * @param bool $mentions Fetch conversations where we are mentioned
-	 * @param bool $override Override the interval setting
-	 */
-	public static function check_conversations($mentions = false, $override = false) {
-		$last = get_config('system','ostatus_last_poll');
-
-		$poll_interval = intval(get_config('system','ostatus_poll_interval'));
-		if (!$poll_interval) {
-			$poll_interval = self::OSTATUS_DEFAULT_POLL_INTERVAL;
-		}
-
-		// Don't poll if the interval is set negative
-		if (($poll_interval < 0) && !$override) {
-			return;
-		}
-
-		if (!$mentions) {
-			$poll_timeframe = intval(get_config('system','ostatus_poll_timeframe'));
-			if (!$poll_timeframe) {
-				$poll_timeframe = self::OSTATUS_DEFAULT_POLL_TIMEFRAME;
-			}
-		} else {
-			$poll_timeframe = intval(get_config('system','ostatus_poll_timeframe'));
-			if (!$poll_timeframe) {
-				$poll_timeframe = self::OSTATUS_DEFAULT_POLL_TIMEFRAME_MENTIONS;
-			}
-		}
-
-
-		if ($last && !$override) {
-			$next = $last + ($poll_interval * 60);
-			if ($next > time()) {
-				logger('poll interval not reached');
-				return;
-			}
-		}
-
-		logger('cron_start');
-
-		$start = date("Y-m-d H:i:s", time() - ($poll_timeframe * 60));
-
-		if ($mentions) {
-			$conversations = q("SELECT `term`.`oid`, `term`.`url`, `term`.`uid` FROM `term`
-						STRAIGHT_JOIN `thread` ON `thread`.`iid` = `term`.`oid` AND `thread`.`uid` = `term`.`uid`
-						WHERE `term`.`type` = 7 AND `term`.`term` > '%s' AND `thread`.`mention`
-						GROUP BY `term`.`url`, `term`.`uid`, `term`.`oid`, `term`.`term` ORDER BY `term`.`term` DESC", dbesc($start));
-		} else {
-			$conversations = q("SELECT `oid`, `url`, `uid` FROM `term`
-						WHERE `type` = 7 AND `term` > '%s'
-						GROUP BY `url`, `uid`, `oid`, `term` ORDER BY `term` DESC", dbesc($start));
-		}
-
-		foreach ($conversations AS $conversation) {
-			self::completion($conversation['url'], $conversation['uid']);
-		}
-
-		logger('cron_end');
-
-		set_config('system','ostatus_last_poll', time());
-	}
-
-	/**
-	 * @brief Updates the gcontact table with actor data from the conversation
-	 *
-	 * @param object $actor The actor object that contains the contact data
-	 */
-	private static function conv_fetch_actor($actor) {
-
-		// We set the generation to "3" since the data here is not as reliable as the data we get on other occasions
-		$contact = array("network" => NETWORK_OSTATUS, "generation" => 3);
-
-		if (isset($actor->url))
-			$contact["url"] = $actor->url;
-
-		if (isset($actor->displayName))
-			$contact["name"] = $actor->displayName;
-
-		if (isset($actor->portablecontacts_net->displayName))
-			$contact["name"] = $actor->portablecontacts_net->displayName;
-
-		if (isset($actor->portablecontacts_net->preferredUsername))
-			$contact["nick"] = $actor->portablecontacts_net->preferredUsername;
-
-		if (isset($actor->id))
-			$contact["alias"] = $actor->id;
-
-		if (isset($actor->summary))
-			$contact["about"] = $actor->summary;
-
-		if (isset($actor->portablecontacts_net->note))
-			$contact["about"] = $actor->portablecontacts_net->note;
-
-		if (isset($actor->portablecontacts_net->addresses->formatted))
-			$contact["location"] = $actor->portablecontacts_net->addresses->formatted;
-
-
-		if (isset($actor->image->url))
-			$contact["photo"] = $actor->image->url;
-
-		if (isset($actor->image->width))
-			$avatarwidth = $actor->image->width;
-
-		if (is_array($actor->status_net->avatarLinks))
-			foreach ($actor->status_net->avatarLinks AS $avatar) {
-				if ($avatarsize < $avatar->width) {
-					$contact["photo"] = $avatar->url;
-					$avatarsize = $avatar->width;
-				}
-			}
-
-		$contact["hide"] = false; // OStatus contacts are never hidden
-		update_gcontact($contact);
-	}
-
-	/**
-	 * @brief Fetches the conversation url for a given item link or conversation id
-	 *
-	 * @param string $self The link to the posting
-	 * @param string $conversation_id The conversation id
-	 *
-	 * @return string The conversation url
-	 */
-	private static function fetch_conversation($self, $conversation_id = "") {
-
-		if ($conversation_id != "") {
-			$elements = explode(":", $conversation_id);
-
-			if ((count($elements) <= 2) || ($elements[0] != "tag"))
-				return $conversation_id;
-		}
-
-		if ($self == "")
-			return "";
-
-		$json = str_replace(".atom", ".json", $self);
-
-		$raw = fetch_url($json);
-		if ($raw == "")
-			return "";
-
-		$data = json_decode($raw);
-		if (!is_object($data))
-			return "";
-
-		$conversation_id = $data->statusnet_conversation_id;
-
-		$pos = strpos($self, "/api/statuses/show/");
-		$base_url = substr($self, 0, $pos);
-
-		return $base_url."/conversation/".$conversation_id;
-	}
-
-	/**
-	 * @brief Fetches a shared object from a given conversation object
-	 *
-	 * Sometimes GNU Social seems to fail when returning shared objects.
-	 * Then they don't contains all needed data.
-	 * We then try to find this object in the conversation
-	 *
-	 * @param string $id Message id
-	 * @param object $conversation Conversation object
-	 *
-	 * @return object The shared object
-	 */
-	private static function shared_object($id, $conversation) {
-		if (!is_array($conversation->items)) {
-			return false;
-		}
-		foreach ($conversation->items AS $single_conv) {
-			if ($single_conv->id == $id) {
-				return $single_conv;
-			}
-		}
-		return false;
-	}
-
-	/**
-	 * @brief Fetches actor details of a given actor and user id
-	 *
-	 * @param string $actor The actor url
-	 * @param int $uid The user id
-	 * @param int $contact_id The default contact-id
-	 *
-	 * @return array Array with actor details
-	 */
-	private static function get_actor_details($actor, $uid, $contact_id) {
-
-		$details = array();
-
-		$contact = q("SELECT `id`, `rel`, `network` FROM `contact` WHERE `uid` = %d AND `nurl` = '%s' AND `network` != '%s'",
-					$uid, normalise_link($actor), NETWORK_STATUSNET);
-
-		if (!$contact)
-			$contact = q("SELECT `id`, `rel`, `network` FROM `contact` WHERE `uid` = %d AND `alias` IN ('%s', '%s') AND `network` != '%s'",
-					$uid, $actor, normalise_link($actor), NETWORK_STATUSNET);
-
-		if ($contact) {
-			logger("Found contact for url ".$actor, LOGGER_DEBUG);
-			$details["contact_id"] = $contact[0]["id"];
-			$details["network"] = $contact[0]["network"];
-
-			$details["not_following"] = !in_array($contact[0]["rel"], array(CONTACT_IS_SHARING, CONTACT_IS_FRIEND));
-		} else {
-			logger("No contact found for user ".$uid." and url ".$actor, LOGGER_DEBUG);
-
-			// Adding a global contact
-			/// @TODO Use this data for the post
-			$details["global_contact_id"] = get_contact($actor, 0);
-
-			logger("Global contact ".$global_contact_id." found for url ".$actor, LOGGER_DEBUG);
-
-			$details["contact_id"] = $contact_id;
-			$details["network"] = NETWORK_OSTATUS;
-
-			$details["not_following"] = true;
-		}
-
-		return $details;
-	}
-
-	/**
-	 * @brief Stores an item and completes the thread
-	 *
-	 * @param string $conversation_url The URI of the conversation
-	 * @param integer $uid The user id
-	 * @param array $item Data of the item that is to be posted
-	 *
-	 * @return integer The item id of the posted item array
-	 */
-	private static function completion($conversation_url, $uid, $item = array(), $self = "") {
-
-		/// @todo This function is totally ugly and has to be rewritten totally
-
-		// Import all threads or only threads that were started by our followers?
-		$all_threads = !get_config('system','ostatus_full_threads');
-
-		$item_stored = -1;
-
-		$conversation_url = self::fetch_conversation($self, $conversation_url);
-
-		// If the thread shouldn't be completed then store the item and go away
-		// Don't do a completion on liked content
-		if (((intval(get_config('system','ostatus_poll_interval')) == -2) && (count($item) > 0)) ||
-			($item["verb"] == ACTIVITY_LIKE) || ($conversation_url == "")) {
-			$item_stored = item_store($item, $all_threads);
-			return $item_stored;
-		}
-
-		// Get the parent
-		$parents = q("SELECT `item`.`id`, `item`.`parent`, `item`.`uri`, `item`.`contact-id`, `item`.`type`,
-				`item`.`verb`, `item`.`visible` FROM `term`
-				STRAIGHT_JOIN `item` AS `thritem` ON `thritem`.`parent` = `term`.`oid`
-				STRAIGHT_JOIN `item` ON `item`.`parent` = `thritem`.`parent`
-				WHERE `term`.`uid` = %d AND `term`.`otype` = %d AND `term`.`type` = %d AND `term`.`url` = '%s'",
-				intval($uid), intval(TERM_OBJ_POST), intval(TERM_CONVERSATION), dbesc($conversation_url));
-		if ($parents) {
-			$parent = $parents[0];
-		} elseif (count($item) > 0) {
-			$parent = $item;
-			$parent["type"] = "remote";
-			$parent["verb"] = ACTIVITY_POST;
-			$parent["visible"] = 1;
-		} else {
-			// Preset the parent
-			$r = q("SELECT `id` FROM `contact` WHERE `self` AND `uid`=%d", $uid);
-			if (!dbm::is_result($r)) {
-				return -2;
-			}
-			$parent = array();
-			$parent["id"] = 0;
-			$parent["parent"] = 0;
-			$parent["uri"] = "";
-			$parent["contact-id"] = $r[0]["id"];
-			$parent["type"] = "remote";
-			$parent["verb"] = ACTIVITY_POST;
-			$parent["visible"] = 1;
-		}
-
-		$conv = str_replace("/conversation/", "/api/statusnet/conversation/", $conversation_url).".as";
-		$pageno = 1;
-		$items = array();
-
-		logger('fetching conversation url '.$conv.' (Self: '.$self.') for user '.$uid);
-
-		do {
-			$conv_arr = z_fetch_url($conv."?page=".$pageno);
-
-			// If it is a non-ssl site and there is an error, then try ssl or vice versa
-			if (!$conv_arr["success"] && (substr($conv, 0, 7) == "http://")) {
-				$conv = str_replace("http://", "https://", $conv);
-				$conv_as = fetch_url($conv."?page=".$pageno);
-			} elseif (!$conv_arr["success"] && (substr($conv, 0, 8) == "https://")) {
-				$conv = str_replace("https://", "http://", $conv);
-				$conv_as = fetch_url($conv."?page=".$pageno);
-			} else {
-				$conv_as = $conv_arr["body"];
-			}
-			$conv_as = str_replace(',"statusnet:notice_info":', ',"statusnet_notice_info":', $conv_as);
-			$conv_as = json_decode($conv_as);
-
-			$no_of_items = sizeof($items);
-
-			if (@is_array($conv_as->items))
-				foreach ($conv_as->items AS $single_item)
-					$items[$single_item->id] = $single_item;
-
-			if ($no_of_items == sizeof($items))
-				break;
-
-			$pageno++;
-
-		} while (true);
-
-		logger('fetching conversation done. Found '.count($items).' items');
-
-		if (!sizeof($items)) {
-			if (count($item) > 0) {
-				$item_stored = item_store($item, $all_threads);
-
-				if ($item_stored) {
-					logger("Conversation ".$conversation_url." couldn't be fetched. Item uri ".$item["uri"]." stored: ".$item_stored, LOGGER_DEBUG);
-					self::store_conversation($item_id, $conversation_url);
-				}
-
-				return $item_stored;
-			} else {
-				return -3;
-			}
-		}
-
-		$items = array_reverse($items);
-
-		$r = q("SELECT `nurl` FROM `contact` WHERE `uid` = %d AND `self`", intval($uid));
-		$importer = $r[0];
-
-		$new_parent = true;
-
-		foreach ($items as $single_conv) {
-
-			// Update the gcontact table
-			self::conv_fetch_actor($single_conv->actor);
-
-			// Test - remove before flight
-			//$tempfile = tempnam(get_temppath(), "conversation");
-			//file_put_contents($tempfile, json_encode($single_conv));
-
-			$mention = false;
-
-			if (isset($single_conv->object->id))
-				$single_conv->id = $single_conv->object->id;
-
-			$plink = self::convert_href($single_conv->id);
-			if (isset($single_conv->object->url))
-				$plink = self::convert_href($single_conv->object->url);
-
-			if (@!$single_conv->id)
-				continue;
-
-			logger("Got id ".$single_conv->id, LOGGER_DEBUG);
-
-			if ($first_id == "") {
-				$first_id = $single_conv->id;
-
-				// The first post of the conversation isn't our first post. There are three options:
-				// 1. Our conversation hasn't the "real" thread starter
-				// 2. This first post is a post inside our thread
-				// 3. This first post is a post inside another thread
-				if (($first_id != $parent["uri"]) && ($parent["uri"] != "")) {
-
-					$new_parent = true;
-
-					$new_parents = q("SELECT `id`, `parent`, `uri`, `contact-id`, `type`, `verb`, `visible` FROM `item` WHERE `id` IN
-								(SELECT `parent` FROM `item`
-									WHERE `uid` = %d AND `uri` = '%s' AND `network` IN ('%s','%s')) LIMIT 1",
-						intval($uid), dbesc($first_id), dbesc(NETWORK_OSTATUS), dbesc(NETWORK_DFRN));
-					if ($new_parents) {
-						if ($new_parents[0]["parent"] == $parent["parent"]) {
-							// Option 2: This post is already present inside our thread - but not as thread starter
-							logger("Option 2: uri present in our thread: ".$first_id, LOGGER_DEBUG);
-							$first_id = $parent["uri"];
-						} else {
-							// Option 3: Not so good. We have mixed parents. We have to see how to clean this up.
-							// For now just take the new parent.
-							$parent = $new_parents[0];
-							$first_id = $parent["uri"];
-							logger("Option 3: mixed parents for uri ".$first_id, LOGGER_DEBUG);
-						}
-					} else {
-						// Option 1: We hadn't got the real thread starter
-						// We have to clean up our existing messages.
-						$parent["id"] = 0;
-						$parent["uri"] = $first_id;
-						logger("Option 1: we have a new parent: ".$first_id, LOGGER_DEBUG);
-					}
-				} elseif ($parent["uri"] == "") {
-					$parent["id"] = 0;
-					$parent["uri"] = $first_id;
-				}
-			}
-
-			$parent_uri = $parent["uri"];
-
-			// "context" only seems to exist on older servers
-			if (isset($single_conv->context->inReplyTo->id)) {
-				$parent_exists = q("SELECT `id` FROM `item` WHERE `uid` = %d AND `uri` = '%s' AND `network` IN ('%s','%s') LIMIT 1",
-							intval($uid), dbesc($single_conv->context->inReplyTo->id), dbesc(NETWORK_OSTATUS), dbesc(NETWORK_DFRN));
-				if ($parent_exists)
-					$parent_uri = $single_conv->context->inReplyTo->id;
-			}
-
-			// This is the current way
-			if (isset($single_conv->object->inReplyTo->id)) {
-				$parent_exists = q("SELECT `id` FROM `item` WHERE `uid` = %d AND `uri` = '%s' AND `network` IN ('%s','%s') LIMIT 1",
-							intval($uid), dbesc($single_conv->object->inReplyTo->id), dbesc(NETWORK_OSTATUS), dbesc(NETWORK_DFRN));
-				if ($parent_exists)
-					$parent_uri = $single_conv->object->inReplyTo->id;
-			}
-
-			$message_exists = q("SELECT `id`, `parent`, `uri` FROM `item` WHERE `uid` = %d AND `uri` = '%s' AND `network` IN ('%s','%s') LIMIT 1",
-							intval($uid), dbesc($single_conv->id),
-							dbesc(NETWORK_OSTATUS), dbesc(NETWORK_DFRN));
-			if ($message_exists) {
-				logger("Message ".$single_conv->id." already existed on the system", LOGGER_DEBUG);
-
-				if ($parent["id"] != 0) {
-					$existing_message = $message_exists[0];
-
-					// We improved the way we fetch OStatus messages, this shouldn't happen very often now
-					/// @TODO We have to change the shadow copies as well. This way here is really ugly.
-					if ($existing_message["parent"] != $parent["id"]) {
-						logger('updating id '.$existing_message["id"].' with parent '.$existing_message["parent"].' to parent '.$parent["id"].' uri '.$parent["uri"].' thread '.$parent_uri, LOGGER_DEBUG);
-
-						// Update the parent id of the selected item
-						$r = q("UPDATE `item` SET `parent` = %d, `parent-uri` = '%s' WHERE `id` = %d",
-							intval($parent["id"]), dbesc($parent["uri"]), intval($existing_message["id"]));
-
-						// Update the parent uri in the thread - but only if it points to itself
-						$r = q("UPDATE `item` SET `thr-parent` = '%s' WHERE `id` = %d AND `uri` = `thr-parent`",
-							dbesc($parent_uri), intval($existing_message["id"]));
-
-						// try to change all items of the same parent
-						$r = q("UPDATE `item` SET `parent` = %d, `parent-uri` = '%s' WHERE `parent` = %d",
-							intval($parent["id"]), dbesc($parent["uri"]), intval($existing_message["parent"]));
-
-						// Update the parent uri in the thread - but only if it points to itself
-						$r = q("UPDATE `item` SET `thr-parent` = '%s' WHERE (`parent` = %d) AND (`uri` = `thr-parent`)",
-							dbesc($parent["uri"]), intval($existing_message["parent"]));
-
-						// Now delete the thread
-						delete_thread($existing_message["parent"]);
-					}
-				}
-
-				// The item we are having on the system is the one that we wanted to store via the item array
-				if (isset($item["uri"]) && ($item["uri"] == $existing_message["uri"])) {
-					$item = array();
-					$item_stored = 0;
-				}
-
-				continue;
-			}
-
-			if (is_array($single_conv->to))
-				foreach ($single_conv->to AS $to)
-					if ($importer["nurl"] == normalise_link($to->id))
-						$mention = true;
-
-			$actor = $single_conv->actor->id;
-			if (isset($single_conv->actor->url))
-				$actor = $single_conv->actor->url;
-
-			$details = self::get_actor_details($actor, $uid, $parent["contact-id"]);
-
-			// Do we only want to import threads that were started by our contacts?
-			if ($details["not_following"] && $new_parent && get_config('system','ostatus_full_threads')) {
-				logger("Don't import uri ".$first_id." because user ".$uid." doesn't follow the person ".$actor, LOGGER_DEBUG);
-				continue;
-			}
-
-			/// @TODO One statment is okay (until if () )
-			$arr = array();
-			$arr["network"] = $details["network"];
-			$arr["uri"] = $single_conv->id;
-			$arr["plink"] = $plink;
-			$arr["uid"] = $uid;
-			$arr["contact-id"] = $details["contact_id"];
-			$arr["parent-uri"] = $parent_uri;
-			$arr["created"] = $single_conv->published;
-			$arr["edited"] = $single_conv->published;
-			$arr["owner-name"] = $single_conv->actor->displayName;
-			if ($arr["owner-name"] == '')
-				$arr["owner-name"] = $single_conv->actor->contact->displayName;
-			if ($arr["owner-name"] == '')
-				$arr["owner-name"] = $single_conv->actor->portablecontacts_net->displayName;
-
-			$arr["owner-link"] = $actor;
-			$arr["owner-avatar"] = Probe::fixAvatar($single_conv->actor->image->url, $arr["owner-link"]);
-
-			$arr["author-name"] = $arr["owner-name"];
-			$arr["author-link"] = $arr["owner-link"];
-			$arr["author-avatar"] = $arr["owner-avatar"];
-			$arr["body"] = add_page_info_to_body(html2bbcode($single_conv->content));
-
-			if (isset($single_conv->status_net->conversation)) {
-				$arr['conversation-uri'] = $single_conv->status_net->conversation;
-			}
-
-			if (isset($single_conv->status_net->notice_info->source)) {
-				$arr["app"] = strip_tags($single_conv->status_net->notice_info->source);
-			} elseif (isset($single_conv->statusnet->notice_info->source)) {
-				$arr["app"] = strip_tags($single_conv->statusnet->notice_info->source);
-			} elseif (isset($single_conv->statusnet_notice_info->source)) {
-				$arr["app"] = strip_tags($single_conv->statusnet_notice_info->source);
-			} elseif (isset($single_conv->provider->displayName)) {
-				$arr["app"] = $single_conv->provider->displayName;
-			} else {
-				$arr["app"] = "OStatus";
-			}
-
-			$arr["source"] = json_encode($single_conv);
-			$arr["protocol"] = PROTOCOL_GS_CONVERSATION;
-
-			$arr["verb"] = $parent["verb"];
-			$arr["visible"] = $parent["visible"];
-			$arr["location"] = $single_conv->location->displayName;
-			$arr["coord"] = trim($single_conv->location->lat." ".$single_conv->location->lon);
-
-			// Is it a reshared item?
-			if (isset($single_conv->verb) && ($single_conv->verb == "share") && isset($single_conv->object)) {
-				if (is_array($single_conv->object))
-					$single_conv->object = $single_conv->object[0];
-
-				// Sometimes GNU Social doesn't returns a complete object
-				if (!isset($single_conv->object->actor->url)) {
-					$object = self::shared_object($single_conv->object->id, $conversation);
-					if (is_object($object)) {
-						$single_conv->object = $object;
-					}
-				}
-
-				if (isset($single_conv->object->actor->url)) {
-					logger("Found reshared item ".$single_conv->object->id);
-
-					// $single_conv->object->context->conversation;
-
-					if (isset($single_conv->object->object->id)) {
-						$arr["uri"] = $single_conv->object->object->id;
-					} else {
-						$arr["uri"] = $single_conv->object->id;
-					}
-					if (isset($single_conv->object->object->url)) {
-						$plink = self::convert_href($single_conv->object->object->url);
-					} else {
-						$plink = self::convert_href($single_conv->object->url);
-					}
-					if (isset($single_conv->object->object->content)) {
-						$arr["body"] = add_page_info_to_body(html2bbcode($single_conv->object->object->content));
-					} else {
-						$arr["body"] = add_page_info_to_body(html2bbcode($single_conv->object->content));
-					}
-					$arr["plink"] = $plink;
-
-					$arr["created"] = $single_conv->object->published;
-					$arr["edited"] = $single_conv->object->published;
-
-					$arr["author-name"] = $single_conv->object->actor->displayName;
-					if ($arr["owner-name"] == '') {
-						$arr["author-name"] = $single_conv->object->actor->contact->displayName;
-					}
-					$arr["author-link"] = $single_conv->object->actor->url;
-					$arr["author-avatar"] = Probe::fixAvatar($single_conv->object->actor->image->url, $arr["author-link"]);
-
-					$arr["app"] = $single_conv->object->provider->displayName."#";
-					//$arr["verb"] = $single_conv->object->verb;
-
-					$arr["location"] = $single_conv->object->location->displayName;
-					$arr["coord"] = trim($single_conv->object->location->lat." ".$single_conv->object->location->lon);
-				}
-			}
-
-			if ($arr["location"] == "")
-				unset($arr["location"]);
-
-			if ($arr["coord"] == "")
-				unset($arr["coord"]);
-
-			// Copy fields from given item array
-			if (isset($item["uri"]) && (($item["uri"] == $arr["uri"]) || ($item["uri"] ==  $single_conv->id))) {
-				logger('Use stored item array for item with URI '.$item["uri"], LOGGER_DEBUG);
-				$newitem = item_store($item);
-				$item = array();
-				$item_stored = $newitem;
-			} else {
-				$newitem = item_store($arr);
-			}
-
-			if (!$newitem) {
-				logger("Item wasn't stored ".print_r($arr, true), LOGGER_DEBUG);
-				continue;
-			}
-
-			logger('Stored new item '.$plink.' for parent '.$arr["parent-uri"].' under id '.$newitem, LOGGER_DEBUG);
-
-			// Add the conversation entry (but don't fetch the whole conversation)
-			self::store_conversation($newitem, $conversation_url);
-
-			// If the newly created item is the top item then change the parent settings of the thread
-			// This shouldn't happen anymore. This is supposed to be absolote.
-			if ($arr["uri"] == $first_id) {
-				logger('setting new parent to id '.$newitem);
-				$new_parents = q("SELECT `id`, `uri`, `contact-id`, `type`, `verb`, `visible` FROM `item` WHERE `uid` = %d AND `id` = %d LIMIT 1",
-					intval($uid), intval($newitem));
-				if ($new_parents)
-					$parent = $new_parents[0];
-			}
-		}
-
-		if (($item_stored < 0) && (count($item) > 0)) {
-
-			if (get_config('system','ostatus_full_threads')) {
-				$details = self::get_actor_details($item["owner-link"], $uid, $item["contact-id"]);
-				if ($details["not_following"]) {
-					logger("Don't import uri ".$item["uri"]." because user ".$uid." doesn't follow the person ".$item["owner-link"], LOGGER_DEBUG);
-					return false;
-				}
-			}
-
-			$item_stored = item_store($item, $all_threads);
-			if ($item_stored) {
-				logger("Uri ".$item["uri"]." wasn't found in conversation ".$conversation_url, LOGGER_DEBUG);
-				self::store_conversation($item_stored, $conversation_url);
-			}
-		}
-
-		return $item_stored;
-	}
-
-	/**
-	 * @brief Stores conversation data into the database
-	 *
-	 * @param integer $itemid The id of the item
-	 * @param string $conversation_url The uri of the conversation
-	 */
-	private static function store_conversation($itemid, $conversation_url) {
-
-		$conversation_url = self::convert_href($conversation_url);
-
-		$messages = q("SELECT `uid`, `parent`, `created`, `received`, `guid` FROM `item` WHERE `id` = %d LIMIT 1", intval($itemid));
-		if (!$messages)
-			return;
-		$message = $messages[0];
-
-		// Store conversation url if not done before
-		$conversation = q("SELECT `url` FROM `term` WHERE `uid` = %d AND `oid` = %d AND `otype` = %d AND `type` = %d",
-			intval($message["uid"]), intval($itemid), intval(TERM_OBJ_POST), intval(TERM_CONVERSATION));
-
-		if (!$conversation) {
-			$r = q("INSERT INTO `term` (`uid`, `oid`, `otype`, `type`, `term`, `url`, `created`, `received`, `guid`) VALUES (%d, %d, %d, %d, '%s', '%s', '%s', '%s', '%s')",
-				intval($message["uid"]), intval($itemid), intval(TERM_OBJ_POST), intval(TERM_CONVERSATION),
-				dbesc($message["created"]), dbesc($conversation_url), dbesc($message["created"]), dbesc($message["received"]), dbesc($message["guid"]));
-			logger('Storing conversation url '.$conversation_url.' for id '.$itemid);
-		}
-	}
-
 	/**
 	 * @brief Checks if the current post is a reshare
 	 *
diff --git a/mod/display.php b/mod/display.php
index 56f7aa644..d8cdf658a 100644
--- a/mod/display.php
+++ b/mod/display.php
@@ -293,7 +293,7 @@ function display_content(App $a, $update = 0) {
 	}
 
 	// We are displaying an "alternate" link if that post was public. See issue 2864
-	$is_public = dba::exists('item', array('id' => $item_id, 'private' => false, 'wall' => true));
+	$is_public = dba::exists('item', array('id' => $item_id, 'private' => false));
 	if ($is_public) {
 		$alternate = System::baseUrl().'/display/'.$nick.'/'.$item_id.'.atom';
 	} else {