From d2ea3eabfb1f70324ff4fa7e7055e2c8a7dbc3d3 Mon Sep 17 00:00:00 2001
From: Michael <heluecht@pirati.ca>
Date: Thu, 21 Jan 2021 07:16:41 +0000
Subject: [PATCH] Replace legacy file/category handling

---
 database.sql                  |  12 +--
 mod/editpost.php              |   6 +-
 mod/item.php                  |  11 +--
 src/Content/Item.php          |   6 +-
 src/Content/Widget.php        |  20 +----
 src/Model/FileTag.php         | 140 +++-------------------------------
 src/Model/Item.php            |  48 +++---------
 src/Model/Post.php            |  19 -----
 src/Model/Post/Category.php   |  69 ++++++++++++++++-
 src/Module/Filer/SaveTag.php  |   3 +-
 src/Protocol/DFRN.php         |   6 +-
 src/Protocol/Diaspora.php     |   4 +-
 static/dbstructure.config.php |   2 +-
 static/dbview.config.php      |  10 ---
 14 files changed, 103 insertions(+), 253 deletions(-)

diff --git a/database.sql b/database.sql
index 987a2d7e2..c9017fd2e 100644
--- a/database.sql
+++ b/database.sql
@@ -1,6 +1,6 @@
 -- ------------------------------------------
 -- Friendica 2021.03-dev (Red Hot Poker)
--- DB_UPDATE_VERSION 1393
+-- DB_UPDATE_VERSION 1394
 -- ------------------------------------------
 
 
@@ -1494,11 +1494,9 @@ CREATE VIEW `post-view` AS SELECT
 	`item`.`id` AS `id`,
 	`item`.`id` AS `item_id`,
 	`item`.`uid` AS `uid`,
-	`item`.`uid` AS `internal-uid`,
 	`item`.`parent` AS `parent`,
 	`item`.`uri` AS `uri`,
 	`item`.`uri-id` AS `uri-id`,
-	`item`.`uri-id` AS `internal-uri-id`,
 	`item`.`parent-uri` AS `parent-uri`,
 	`item`.`parent-uri-id` AS `parent-uri-id`,
 	`item`.`thr-parent` AS `thr-parent`,
@@ -1530,9 +1528,6 @@ CREATE VIEW `post-view` AS SELECT
 	`item`.`network` AS `network`,
 	`item`.`vid` AS `vid`,
 	`item`.`psid` AS `psid`,
-	`item`.`attach` AS `attach`,
-	(SELECT COUNT(*) FROM `post-category` WHERE `post-category`.`uri-id` = `item`.`uri-id`) AS `internal-file-count`,
-	NULL AS `file`,
 	IF (`item`.`vid` IS NULL, '', `verb`.`name`) AS `verb`,
 	`item-content`.`title` AS `title`,
 	`item-content`.`content-warning` AS `content-warning`,
@@ -1653,11 +1648,9 @@ CREATE VIEW `post-thread-view` AS SELECT
 	`thread`.`iid` AS `iid`,
 	`item`.`id` AS `item_id`,
 	`thread`.`uid` AS `uid`,
-	`item`.`uid` AS `internal-uid`,
 	`item`.`parent` AS `parent`,
 	`item`.`uri` AS `uri`,
 	`item`.`uri-id` AS `uri-id`,
-	`item`.`uri-id` AS `internal-uri-id`,
 	`item`.`parent-uri` AS `parent-uri`,
 	`item`.`parent-uri-id` AS `parent-uri-id`,
 	`item`.`thr-parent` AS `thr-parent`,
@@ -1690,9 +1683,6 @@ CREATE VIEW `post-thread-view` AS SELECT
 	`thread`.`network` AS `network`,
 	`item`.`vid` AS `vid`,
 	`item`.`psid` AS `psid`,
-	`item`.`attach` AS `attach`,
-	(SELECT COUNT(*) FROM `post-category` WHERE `post-category`.`uri-id` = `item`.`uri-id`) AS `internal-file-count`,
-	NULL AS `file`,
 	IF (`item`.`vid` IS NULL, '', `verb`.`name`) AS `verb`,
 	`item-content`.`title` AS `title`,
 	`item-content`.`content-warning` AS `content-warning`,
diff --git a/mod/editpost.php b/mod/editpost.php
index 4bfb63ada..31f121bd5 100644
--- a/mod/editpost.php
+++ b/mod/editpost.php
@@ -26,8 +26,6 @@ use Friendica\Core\Renderer;
 use Friendica\Database\DBA;
 use Friendica\DI;
 use Friendica\Model\Contact;
-use Friendica\Model\FileTag;
-use Friendica\Model\Item;
 use Friendica\Model\Post;
 use Friendica\Util\Crypto;
 
@@ -48,7 +46,7 @@ function editpost_content(App $a)
 	}
 
 	$fields = ['allow_cid', 'allow_gid', 'deny_cid', 'deny_gid',
-		'type', 'body', 'title', 'file', 'wall', 'post-type', 'guid'];
+		'type', 'body', 'title', 'uri-id', 'wall', 'post-type', 'guid'];
 
 	$item = Post::selectFirstForUser(local_user(), $fields, ['id' => $post_id, 'uid' => local_user()]);
 
@@ -117,7 +115,7 @@ function editpost_content(App $a)
 		'$jotnets' => $jotnets,
 		'$title' => $item['title'],
 		'$placeholdertitle' => DI::l10n()->t('Set title'),
-		'$category' => FileTag::fileToList($item['file'], 'category'),
+		'$category' => Post\Category::getCSVByURIId($item['uri-id'], local_user(), Post\Category::CATEGORY),
 		'$placeholdercategory' => (Feature::isEnabled(local_user(),'categories') ? DI::l10n()->t("Categories \x28comma-separated list\x29") : ''),
 		'$emtitle' => DI::l10n()->t('Example: bob@example.com, mary@example.com'),
 		'$lockstate' => $lockstate,
diff --git a/mod/item.php b/mod/item.php
index 68904d9ec..68fa6fbf6 100644
--- a/mod/item.php
+++ b/mod/item.php
@@ -252,7 +252,7 @@ function item_post(App $a) {
 		$verb              = $orig_post['verb'];
 		$objecttype        = $orig_post['object-type'];
 		$app               = $orig_post['app'];
-		$categories        = $orig_post['file'] ?? '';
+		$categories        = Post\Category::getTextByURIId($orig_post['uri-id'], $orig_post['uid']);
 		$title             = trim($_REQUEST['title'] ?? '');
 		$body              = trim($body);
 		$private           = $orig_post['private'];
@@ -344,10 +344,7 @@ function item_post(App $a) {
 		$filedas = FileTag::fileToArray($categories);
 	}
 
-	// save old and new categories, so we can determine what needs to be deleted from pconfig
-	$categories_old = $categories;
 	$categories = FileTag::listToFile(trim($_REQUEST['category'] ?? ''), 'category');
-	$categories_new = $categories;
 
 	if (!empty($filedas) && is_array($filedas)) {
 		// append the fileas stuff to the new categories list
@@ -696,9 +693,6 @@ function item_post(App $a) {
 
 		Item::update($fields, ['id' => $post_id]);
 
-		// update filetags in pconfig
-		FileTag::updatePconfig($uid, $categories_old, $categories_new, 'category');
-
 		if ($return_path) {
 			DI::baseUrl()->redirect($return_path);
 		}
@@ -745,9 +739,6 @@ function item_post(App $a) {
 		Tag::createImplicitMentions($datarray['uri-id'], $datarray['thr-parent-id']);
 	}
 
-	// update filetags in pconfig
-	FileTag::updatePconfig($uid, $categories_old, $categories_new, 'category');
-
 	// These notifications are sent if someone else is commenting other your wall
 	if ($contact_record != $author) {
 		if ($toplevel_item_id) {
diff --git a/src/Content/Item.php b/src/Content/Item.php
index c0b1d3b49..06190dc88 100644
--- a/src/Content/Item.php
+++ b/src/Content/Item.php
@@ -23,8 +23,8 @@ namespace Friendica\Content;
 
 use Friendica\Database\DBA;
 use Friendica\Model\Contact;
-use Friendica\Model\FileTag;
 use Friendica\Model\Tag;
+use Friendica\Model\Post;
 
 /**
  * A content helper class for displaying items
@@ -64,7 +64,7 @@ class Item
 		$folders = [];
 		$first = true;
 
-		foreach (FileTag::fileToArray($item['file'] ?? '', 'category') as $savedFolderName) {
+		foreach (Post\Category::getArrayByURIId($item['uri-id'], $item['uid'], Post\Category::CATEGORY) as $savedFolderName) {
 			if (!empty($item['author-link'])) {
 				$url = $item['author-link'] . "?category=" . rawurlencode($savedFolderName);
 			} else {
@@ -85,7 +85,7 @@ class Item
 		}
 
 		if (local_user() == $item['uid']) {
-			foreach (FileTag::fileToArray($item['file'] ?? '') as $savedFolderName) {
+			foreach (Post\Category::getArrayByURIId($item['uri-id'], $item['uid'], Post\Category::FILE) as $savedFolderName) {
 				$folders[] = [
 					'name' => $savedFolderName,
 					'url' => "#",
diff --git a/src/Content/Widget.php b/src/Content/Widget.php
index f4a9fbe1f..8f3edada2 100644
--- a/src/Content/Widget.php
+++ b/src/Content/Widget.php
@@ -27,9 +27,9 @@ use Friendica\Core\Renderer;
 use Friendica\Database\DBA;
 use Friendica\DI;
 use Friendica\Model\Contact;
-use Friendica\Model\FileTag;
 use Friendica\Model\Group;
 use Friendica\Model\Item;
+use Friendica\Model\Post;
 use Friendica\Util\DateTimeFormat;
 use Friendica\Util\Temporal;
 
@@ -305,19 +305,10 @@ class Widget
 			return '';
 		}
 
-		$saved = DI::pConfig()->get(local_user(), 'system', 'filetags');
-		if (!strlen($saved)) {
-			return;
-		}
-
 		$terms = [];
-		foreach (FileTag::fileToArray($saved) as $savedFolderName) {
+		foreach (Post\Category::getArray(local_user(), Post\Category::FILE) as $savedFolderName) {
 			$terms[] = ['ref' => $savedFolderName, 'name' => $savedFolderName];
 		}
-		
-		usort($terms, function ($a, $b) {
-			return strcmp($a['name'], $b['name']);
-		});
 
 		return self::filter(
 			'file',
@@ -348,13 +339,8 @@ class Widget
 			return '';
 		}
 
-		$saved = DI::pConfig()->get($uid, 'system', 'filetags');
-		if (!strlen($saved)) {
-			return;
-		}
-
 		$terms = array();
-		foreach (FileTag::fileToArray($saved, 'category') as $savedFolderName) {
+		foreach (Post\Category::getArray(local_user(), Post\Category::CATEGORY) as $savedFolderName) {
 			$terms[] = ['ref' => $savedFolderName, 'name' => $savedFolderName];
 		}
 
diff --git a/src/Model/FileTag.php b/src/Model/FileTag.php
index 2f5e82ba4..70f934fc3 100644
--- a/src/Model/FileTag.php
+++ b/src/Model/FileTag.php
@@ -22,8 +22,6 @@
 namespace Friendica\Model;
 
 use Friendica\Database\DBA;
-use Friendica\DI;
-use Friendica\Model\Post\Category;
 
 /**
  * This class handles FileTag related functions
@@ -42,7 +40,7 @@ class FileTag
 	 *
 	 * @return string   The URL encoded string.
 	 */
-	public static function encode($s)
+	private static function encode($s)
 	{
 		return str_replace(['<', '>', '[', ']'], ['%3c', '%3e', '%5b', '%5d'], $s);
 	}
@@ -54,31 +52,11 @@ class FileTag
 	 *
 	 * @return string   The decoded string.
 	 */
-	public static function decode($s)
+	private static function decode($s)
 	{
 		return str_replace(['%3c', '%3e', '%5b', '%5d'], ['<', '>', '[', ']'], $s);
 	}
 
-	/**
-	 * Query files for tag
-	 *
-	 * @param string $table The table to be queired.
-	 * @param string $s     The search term
-	 * @param string $type  Optional file type.
-	 *
-	 * @return string       Query string.
-	 */
-	public static function fileQuery($table, $s, $type = 'file')
-	{
-		if ($type == 'file') {
-			$str = preg_quote('[' . str_replace('%', '%%', self::encode($s)) . ']');
-		} else {
-			$str = preg_quote('<' . str_replace('%', '%%', self::encode($s)) . '>');
-		}
-
-		return " AND " . (($table) ? DBA::escape($table) . '.' : '') . "file regexp '" . DBA::escape($str) . "' ";
-	}
-
 	/**
 	 * Get file tags from array
 	 *
@@ -156,93 +134,6 @@ class FileTag
 		return self::arrayToFile($list_array, $type);
 	}
 
-	/**
-	 * Get list from file tags
-	 *
-	 * ex. given <music><video>[friends], return music,video or friends
-	 * @param string $file File tags
-	 * @param string $type Optional file type.
-	 *
-	 * @return string       Comma delimited list of tag names.
-	 * @deprecated since 2019.06 use fileToArray() instead
-	 */
-	public static function fileToList(string $file, $type = 'file')
-	{
-		return implode(',', self::fileToArray($file, $type));
-	}
-
-	/**
-	 * Update file tags in PConfig
-	 *
-	 * @param int    $uid      Unique Identity.
-	 * @param string $file_old Categories previously associated with an item
-	 * @param string $file_new New list of categories for an item
-	 * @param string $type     Optional file type.
-	 *
-	 * @return boolean          A value indicating success or failure.
-	 * @throws \Exception
-	 */
-	public static function updatePconfig(int $uid, string $file_old, string $file_new, string $type = 'file')
-	{
-		if (!intval($uid)) {
-			return false;
-		} elseif ($file_old == $file_new) {
-			return true;
-		}
-
-		$saved = DI::pConfig()->get($uid, 'system', 'filetags');
-
-		if (strlen($saved)) {
-			if ($type == 'file') {
-				$lbracket = '[';
-				$rbracket = ']';
-				$termtype = Category::FILE;
-			} else {
-				$lbracket = '<';
-				$rbracket = '>';
-				$termtype = Category::CATEGORY;
-			}
-
-			$filetags_updated = $saved;
-
-			// check for new tags to be added as filetags in pconfig
-			$new_tags = [];
-			foreach (self::fileToArray($file_new, $type) as $tag) {
-				if (!stristr($saved, $lbracket . self::encode($tag) . $rbracket)) {
-					$new_tags[] = $tag;
-				}
-			}
-
-			$filetags_updated .= self::arrayToFile($new_tags, $type);
-
-			// check for deleted tags to be removed from filetags in pconfig
-			$deleted_tags = [];
-			foreach (self::fileToArray($file_old, $type) as $tag) {
-				if (!stristr($file_new, $lbracket . self::encode($tag) . $rbracket)) {
-					$deleted_tags[] = $tag;
-				}
-			}
-
-			foreach ($deleted_tags as $key => $tag) {
-				if (DBA::exists('category-view', ['name' => $tag, 'type' => $termtype, 'uid' => $uid])) {
-					unset($deleted_tags[$key]);
-				} else {
-					$filetags_updated = str_replace($lbracket . self::encode($tag) . $rbracket, '', $filetags_updated);
-				}
-			}
-
-			if ($saved != $filetags_updated) {
-				DI::pConfig()->set($uid, 'system', 'filetags', $filetags_updated);
-			}
-
-			return true;
-		} elseif (strlen($file_new)) {
-			DI::pConfig()->set($uid, 'system', 'filetags', $file_new);
-		}
-
-		return true;
-	}
-
 	/**
 	 * Add tag to file
 	 *
@@ -259,17 +150,12 @@ class FileTag
 			return false;
 		}
 
-		$item = Post::selectFirst(['file'], ['id' => $item_id, 'uid' => $uid]);
+		$item = Post::selectFirst(['uri-id'], ['id' => $item_id, 'uid' => $uid]);
 		if (DBA::isResult($item)) {
-			if (!stristr($item['file'], '[' . self::encode($file) . ']')) {
-				$fields = ['file' => $item['file'] . '[' . self::encode($file) . ']'];
-				Item::update($fields, ['id' => $item_id]);
-			}
+			$stored_file = Post\Category::getTextByURIId($item['uri-id'], $uid);
 
-			$saved = DI::pConfig()->get($uid, 'system', 'filetags');
-
-			if (!strlen($saved) || !stristr($saved, '[' . self::encode($file) . ']')) {
-				DI::pConfig()->set($uid, 'system', 'filetags', $saved . '[' . self::encode($file) . ']');
+			if (!stristr($stored_file, '[' . self::encode($file) . ']')) {
+				Post\Category::storeTextByURIId($item['uri-id'], $uid, $stored_file . '[' . self::encode($file) . ']');
 			}
 		}
 
@@ -295,26 +181,18 @@ class FileTag
 
 		if ($cat == true) {
 			$pattern = '<' . self::encode($file) . '>';
-			$termtype = Category::CATEGORY;
 		} else {
 			$pattern = '[' . self::encode($file) . ']';
-			$termtype = Category::FILE;
 		}
 
-		$item = Post::selectFirst(['file'], ['id' => $item_id, 'uid' => $uid]);
-
+		$item = Post::selectFirst(['uri-id'], ['id' => $item_id, 'uid' => $uid]);
 		if (!DBA::isResult($item)) {
 			return false;
 		}
 
-		$fields = ['file' => str_replace($pattern, '', $item['file'])];
+		$file = Post\Category::getTextByURIId($item['uri-id'], $uid);
 
-		Item::update($fields, ['id' => $item_id]);
-
-		if (!DBA::exists('category-view', ['name' => $file, 'type' => $termtype, 'uid' => $uid])) {
-			$saved = DI::pConfig()->get($uid, 'system', 'filetags');
-			DI::pConfig()->set($uid, 'system', 'filetags', str_replace($pattern, '', $saved));
-		}
+		Post\Category::storeTextByURIId($item['uri-id'], $uid, str_replace($pattern, '', $file));
 
 		return true;
 	}
diff --git a/src/Model/Item.php b/src/Model/Item.php
index 70bd8b5c2..828bc3210 100644
--- a/src/Model/Item.php
+++ b/src/Model/Item.php
@@ -75,7 +75,7 @@ class Item
 	const DISPLAY_FIELDLIST = [
 		'uid', 'id', 'parent', 'uri-id', 'uri', 'thr-parent', 'parent-uri', 'guid', 'network', 'gravity',
 		'commented', 'created', 'edited', 'received', 'verb', 'object-type', 'postopts', 'plink',
-		'wall', 'private', 'starred', 'origin', 'title', 'body', 'file', 'language',
+		'wall', 'private', 'starred', 'origin', 'title', 'body', 'language',
 		'content-warning', 'location', 'coord', 'app', 'rendered-hash', 'rendered-html', 'object',
 		'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid', 'item_id',
 		'author-id', 'author-link', 'author-name', 'author-avatar', 'author-network',
@@ -112,7 +112,7 @@ class Item
 			'contact-id', 'type', 'wall', 'gravity', 'extid', 'psid',
 			'created', 'edited', 'commented', 'received', 'changed', 'verb',
 			'postopts', 'plink', 'resource-id', 'event-id', 'inform',
-			'file', 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid', 'post-type',
+			'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid', 'post-type',
 			'private', 'pubmail', 'moderated', 'visible', 'starred', 'bookmark',
 			'unseen', 'deleted', 'origin', 'forum_mode', 'mention', 'global', 'network',
 			'title', 'content-warning', 'body', 'location', 'coord', 'app',
@@ -203,17 +203,13 @@ class Item
 		// We cannot simply expand the condition to check for origin entries
 		// The condition needn't to be a simple array but could be a complex condition.
 		// And we have to execute this query before the update to ensure to fetch the same data.
-		$items = DBA::select('item', ['id', 'origin', 'uri', 'uri-id', 'uid', 'file'], $condition);
+		$items = DBA::select('item', ['id', 'origin', 'uri', 'uri-id', 'uid'], $condition);
 
 		$content_fields = [];
 		foreach (array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST) as $field) {
 			if (isset($fields[$field])) {
 				$content_fields[$field] = $fields[$field];
-				if (in_array($field, self::CONTENT_FIELDLIST)) {
-					unset($fields[$field]);
-				} else {
-					$fields[$field] = null;
-				}
+				unset($fields[$field]);
 			}
 		}
 
@@ -221,14 +217,12 @@ class Item
 
 		$clear_fields = ['bookmark', 'type', 'author-name', 'author-avatar', 'author-link', 'owner-name', 'owner-avatar', 'owner-link', 'postopts', 'inform'];
 		foreach ($clear_fields as $field) {
-			if (array_key_exists($field, $fields)) {
-				$fields[$field] = null;
-			}
+			unset($fields[$field]);
 		}
 
 		if (array_key_exists('file', $fields)) {
 			$files = $fields['file'];
-			$fields['file'] = null;
+			unset($fields['file']);
 		} else {
 			$files = null;
 		}
@@ -269,9 +263,6 @@ class Item
 
 			if (!is_null($files)) {
 				Post\Category::storeTextByURIId($item['uri-id'], $item['uid'], $files);
-				if (!empty($item['file'])) {
-					DBA::update('item', ['file' => ''], ['id' => $item['id']]);
-				}
 			}
 
 			if (!empty($fields['attach'])) {
@@ -358,7 +349,7 @@ class Item
 		Logger::info('Mark item for deletion by id', ['id' => $item_id, 'callstack' => System::callstack()]);
 		// locate item to be deleted
 		$fields = ['id', 'uri', 'uri-id', 'uid', 'parent', 'parent-uri', 'origin',
-			'deleted', 'file', 'resource-id', 'event-id',
+			'deleted', 'resource-id', 'event-id',
 			'verb', 'object-type', 'object', 'target', 'contact-id', 'psid', 'gravity'];
 		$item = Post::selectFirst($fields, ['id' => $item_id]);
 		if (!DBA::isResult($item)) {
@@ -377,25 +368,7 @@ class Item
 		}
 
 		// clean up categories and tags so they don't end up as orphans
-
-		$matches = [];
-		$cnt = preg_match_all('/<(.*?)>/', $item['file'], $matches, PREG_SET_ORDER);
-
-		if ($cnt) {
-			foreach ($matches as $mtch) {
-				FileTag::unsaveFile($item['uid'], $item['id'], $mtch[1],true);
-			}
-		}
-
-		$matches = [];
-
-		$cnt = preg_match_all('/\[(.*?)\]/', $item['file'], $matches, PREG_SET_ORDER);
-
-		if ($cnt) {
-			foreach ($matches as $mtch) {
-				FileTag::unsaveFile($item['uid'], $item['id'], $mtch[1],false);
-			}
-		}
+		Post\Category::deleteByURIId($item['uri-id'], $item['uid']);
 
 		/*
 		 * If item is a link to a photo resource, nuke all the associated photos
@@ -2363,7 +2336,7 @@ class Item
 		$condition[0] .= " AND `received` < UTC_TIMESTAMP() - INTERVAL ? DAY";
 		$condition[] = $days;
 
-		$items = Post::select(['file', 'resource-id', 'starred', 'type', 'id', 'post-type'], $condition);
+		$items = Post::select(['resource-id', 'starred', 'type', 'id', 'post-type', 'uid', 'uri-id'], $condition);
 
 		if (!DBA::isResult($items)) {
 			return;
@@ -2386,8 +2359,7 @@ class Item
 
 		while ($item = Post::fetch($items)) {
 			// don't expire filed items
-
-			if (strpos($item['file'], '[') !== false) {
+			if (DBA::exists('post-category', ['uri-id' => $item['uri-id'], 'uid' => $item['uid'], 'type' => Post\Category::FILE])) {
 				continue;
 			}
 
diff --git a/src/Model/Post.php b/src/Model/Post.php
index 5107e71ab..ec348c60a 100644
--- a/src/Model/Post.php
+++ b/src/Model/Post.php
@@ -63,22 +63,6 @@ class Post
 			}
 		}
 
-		if (!array_key_exists('verb', $row) || in_array($row['verb'], ['', Activity::POST, Activity::SHARE])) {
-			// Build the file string out of the term entries
-			if (array_key_exists('file', $row)) {
-				if ($row['internal-file-count'] > 0) {
-					$row['file'] = Post\Category::getTextByURIId($row['internal-uri-id'], $row['internal-uid']);
-				} else {
-					$row['file'] = '';
-				}
-			}
-		}
-
-		// Remove internal fields
-		unset($row['internal-file-count']);
-		unset($row['internal-uri-id']);
-		unset($row['internal-uid']);
-
 		return $row;
 	}
 
@@ -213,7 +197,6 @@ class Post
 			}
 		}
 
-		$selected = array_merge($selected, ['internal-uri-id', 'internal-uid', 'internal-file-count']);
 		$selected = array_unique($selected);
 
 		return DBA::select($view, $selected, $condition, $params);
@@ -267,8 +250,6 @@ class Post
 			$selected = Item::DISPLAY_FIELDLIST;
 		}
 
-		$selected = array_unique(array_merge($selected, ['internal-uri-id', 'internal-uid', 'internal-file-count']));
-
 		$condition = DBA::mergeConditions($condition,
 			["`visible` AND NOT `deleted` AND NOT `moderated`
 			AND NOT `author-blocked` AND NOT `owner-blocked`
diff --git a/src/Model/Post/Category.php b/src/Model/Post/Category.php
index f2c66c662..b653f43a7 100644
--- a/src/Model/Post/Category.php
+++ b/src/Model/Post/Category.php
@@ -22,7 +22,6 @@
 namespace Friendica\Model\Post;
 
 use Friendica\Database\DBA;
-use Friendica\Model\Item;
 use Friendica\Model\Post;
 use Friendica\Model\Tag;
 
@@ -38,11 +37,25 @@ class Category
     const CATEGORY          = 3;
     const FILE              = 5;
 
+	/**
+	 * Delete all categories and files from a given uri-id and user
+	 *
+	 * @param int $uri_id
+	 * @param int $uid
+	 * @return boolean success
+	 * @throws \Exception
+	 */
+	public static function deleteByURIId(int $uri_id, int $uid)
+	{
+		return DBA::delete('post-category', ['uri-id' => $uri_id, 'uid' => $uid]);
+	}
+
 	/**
 	 * Generates the legacy item.file field string from an item ID.
 	 * Includes only file and category terms.
 	 *
-	 * @param int $item_id
+	 * @param int $uri_id
+	 * @param int $uid
 	 * @return string
 	 * @throws \Exception
 	 */
@@ -62,6 +75,58 @@ class Category
 		return $file_text;
 	}
 
+	/**
+	 * Generates an array of files or categories of a given uri-id
+	 *
+	 * @param int $uid
+	 * @param int $type
+	 * @return array
+	 * @throws \Exception
+	 */
+	public static function getArray(int $uid, int $type)
+	{
+		$tags = DBA::selectToArray('category-view', ['name'], ['uid' => $uid, 'type' => $type],
+			['group_by' => ['name'], 'order' => ['name']]);
+		if (empty($tags)) {
+			return [];
+		}
+
+		return array_column($tags, 'name');
+	}
+
+	/**
+	 * Generates an array of files or categories of a given uri-id
+	 *
+	 * @param int $uri_id
+	 * @param int $uid
+	 * @param int $type
+	 * @return array
+	 * @throws \Exception
+	 */
+	public static function getArrayByURIId(int $uri_id, int $uid, int $type = self::CATEGORY)
+	{
+		$tags = DBA::selectToArray('category-view', ['type', 'name'], ['uri-id' => $uri_id, 'uid' => $uid, 'type' => $type]);
+		if (empty($tags)) {
+			return [];
+		}
+
+		return array_column($tags, 'name');
+	}
+
+	/**
+	 * Generates a comma separated list of files or categories
+	 *
+	 * @param int $uri_id
+	 * @param int $uid
+	 * @param int $type
+	 * @return string
+	 * @throws \Exception
+	 */
+	public static function getCSVByURIId(int $uri_id, int $uid, int $type)
+	{
+		return implode(',', self::getArrayByURIId($uri_id, $uid, $type));
+	}
+
 	/**
 	 * Inserts new terms for the provided item ID based on the legacy item.file field BBCode content.
 	 * Deletes all previous file terms for the same item ID.
diff --git a/src/Module/Filer/SaveTag.php b/src/Module/Filer/SaveTag.php
index 4b2fdb09e..a396c1770 100644
--- a/src/Module/Filer/SaveTag.php
+++ b/src/Module/Filer/SaveTag.php
@@ -57,8 +57,7 @@ class SaveTag extends BaseModule
 		}
 
 		// return filer dialog
-		$filetags = DI::pConfig()->get(local_user(), 'system', 'filetags', '');
-		$filetags = Model\FileTag::fileToArray($filetags);
+		$filetags = Model\Post\Category::getArray(local_user(), Model\Post\Category::FILE);
 
 		$tpl = Renderer::getMarkupTemplate("filer_dialog.tpl");
 		echo Renderer::replaceMacros($tpl, [
diff --git a/src/Protocol/DFRN.php b/src/Protocol/DFRN.php
index 23a287a9a..6cc2de44f 100644
--- a/src/Protocol/DFRN.php
+++ b/src/Protocol/DFRN.php
@@ -2508,14 +2508,14 @@ class DFRN
 		}
 
 		$condition = ['uri' => $uri, 'uid' => $importer["importer_uid"]];
-		$item = Post::selectFirst(['id', 'parent', 'contact-id', 'file', 'deleted', 'gravity'], $condition);
+		$item = Post::selectFirst(['id', 'parent', 'contact-id', 'uri-id', 'deleted', 'gravity'], $condition);
 		if (!DBA::isResult($item)) {
 			Logger::log("Item with uri " . $uri . " for user " . $importer["importer_uid"] . " wasn't found.", Logger::DEBUG);
 			return;
 		}
 
-		if (strstr($item['file'], '[')) {
-			Logger::log("Item with uri " . $uri . " for user " . $importer["importer_uid"] . " is filed. So it won't be deleted.", Logger::DEBUG);
+		if (DBA::exists('post-category', ['uri-id' => $item['uri-id'], 'uid' => $importer['importer_uid'], 'type' => Post\Category::FILE])) {
+			Logger::notice("Item is filed. It won't be deleted.", ['uri' => $uri, 'uri-id' => $item['uri_id'], 'uid' => $importer["importer_uid"]]);
 			return;
 		}
 
diff --git a/src/Protocol/Diaspora.php b/src/Protocol/Diaspora.php
index 34dc94140..7ba385b6e 100644
--- a/src/Protocol/Diaspora.php
+++ b/src/Protocol/Diaspora.php
@@ -2526,7 +2526,7 @@ class Diaspora
 		}
 
 		// Fetch items that are about to be deleted
-		$fields = ['uid', 'id', 'parent', 'author-link', 'file'];
+		$fields = ['uid', 'id', 'parent', 'author-link', 'uri-id'];
 
 		// When we receive a public retraction, we delete every item that we find.
 		if ($importer['uid'] == 0) {
@@ -2542,7 +2542,7 @@ class Diaspora
 		}
 
 		while ($item = Post::fetch($r)) {
-			if (strstr($item['file'], '[')) {
+			if (DBA::exists('post-category', ['uri-id' => $item['uri-id'], 'uid' => $item['uid'], 'type' => Post\Category::FILE])) {
 				Logger::log("Target guid " . $target_guid . " for user " . $item['uid'] . " is filed. So it won't be deleted.", Logger::DEBUG);
 				continue;
 			}
diff --git a/static/dbstructure.config.php b/static/dbstructure.config.php
index 23c35358e..feba3c920 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', 1393);
+	define('DB_UPDATE_VERSION', 1394);
 }
 
 return [
diff --git a/static/dbview.config.php b/static/dbview.config.php
index 15cd4aef3..b369ee9fa 100644
--- a/static/dbview.config.php
+++ b/static/dbview.config.php
@@ -42,11 +42,9 @@
 			"id" => ["item", "id"],
 			"item_id" => ["item", "id"],
 			"uid" => ["item", "uid"],
-			"internal-uid" => ["item", "uid"],
 			"parent" => ["item", "parent"],
 			"uri" => ["item", "uri"],
 			"uri-id" => ["item", "uri-id"],
-			"internal-uri-id" => ["item", "uri-id"],
 			"parent-uri" => ["item", "parent-uri"],
 			"parent-uri-id" => ["item", "parent-uri-id"],
 			"thr-parent" => ["item", "thr-parent"],
@@ -78,9 +76,6 @@
 			"network" => ["item", "network"],
 			"vid" => ["item", "vid"],
 			"psid" => ["item", "psid"],
-			"attach" => ["item", "attach"],
-			"internal-file-count" => "(SELECT COUNT(*) FROM `post-category` WHERE `post-category`.`uri-id` = `item`.`uri-id`)",
-			"file" => "NULL",
 			"verb" => "IF (`item`.`vid` IS NULL, '', `verb`.`name`)",
 			"title" => ["item-content", "title"],
 			"content-warning" => ["item-content", "content-warning"],
@@ -199,11 +194,9 @@
 			"iid" => ["thread", "iid"],
 			"item_id" => ["item", "id"],
 			"uid" => ["thread", "uid"],
-			"internal-uid" => ["item", "uid"],
 			"parent" => ["item", "parent"],
 			"uri" => ["item", "uri"],
 			"uri-id" => ["item", "uri-id"],
-			"internal-uri-id" => ["item", "uri-id"],
 			"parent-uri" => ["item", "parent-uri"],
 			"parent-uri-id" => ["item", "parent-uri-id"],
 			"thr-parent" => ["item", "thr-parent"],
@@ -236,9 +229,6 @@
 			"network" => ["thread", "network"],
 			"vid" => ["item", "vid"],
 			"psid" => ["item", "psid"],
-			"attach" => ["item", "attach"],
-			"internal-file-count" => "(SELECT COUNT(*) FROM `post-category` WHERE `post-category`.`uri-id` = `item`.`uri-id`)",
-			"file" => "NULL",
 			"verb" => "IF (`item`.`vid` IS NULL, '', `verb`.`name`)",
 			"title" => ["item-content", "title"],
 			"content-warning" => ["item-content", "content-warning"],