From 865ecc87963dc3b26e66296616eef2a1cc41ac3f Mon Sep 17 00:00:00 2001
From: Andrew Dolgov <fox@fakecake.org>
Date: Wed, 25 Oct 2023 12:55:09 +0300
Subject: move to psr-4 autoloader

---
 classes/Article.php | 730 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 730 insertions(+)
 create mode 100644 classes/Article.php

(limited to 'classes/Article.php')

diff --git a/classes/Article.php b/classes/Article.php
new file mode 100644
index 000000000..0b446479b
--- /dev/null
+++ b/classes/Article.php
@@ -0,0 +1,730 @@
+<?php
+class Article extends Handler_Protected {
+	const ARTICLE_KIND_ALBUM = 1;
+	const ARTICLE_KIND_VIDEO = 2;
+	const ARTICLE_KIND_YOUTUBE = 3;
+
+	const CATCHUP_MODE_MARK_AS_READ = 0;
+	const CATCHUP_MODE_MARK_AS_UNREAD = 1;
+	const CATCHUP_MODE_TOGGLE = 2;
+
+	function redirect(): void {
+		$article = ORM::for_table('ttrss_entries')
+			->table_alias('e')
+			->join('ttrss_user_entries', [ 'ref_id', '=', 'e.id'], 'ue')
+				->where('ue.owner_uid', $_SESSION['uid'])
+				->find_one((int)$_REQUEST['id']);
+
+		if ($article) {
+			$article_url = UrlHelper::validate($article->link);
+
+			if ($article_url) {
+				header("Location: $article_url");
+				return;
+			}
+		}
+
+		header($_SERVER["SERVER_PROTOCOL"]." 404 Not Found");
+		print "Article not found or has an empty URL.";
+	}
+
+	static function _create_published_article(string $title, string $url, string $content, string $labels_str, int $owner_uid): bool {
+
+		$guid = 'SHA1:' . sha1("ttshared:" . $url . $owner_uid); // include owner_uid to prevent global GUID clash
+
+		if (!$content) {
+			$pluginhost = new PluginHost();
+			$pluginhost->load_all(PluginHost::KIND_ALL, $owner_uid);
+			//$pluginhost->load_data();
+
+			$pluginhost->run_hooks_callback(PluginHost::HOOK_GET_FULL_TEXT,
+				function ($result) use (&$content) {
+					if ($result) {
+						$content = $result;
+						return true;
+					}
+				},
+				$url);
+		}
+
+		$content_hash = sha1($content);
+
+		if ($labels_str != "") {
+			$labels = explode(",", $labels_str);
+		} else {
+			$labels = array();
+		}
+
+		$rc = false;
+
+		if (!$title) $title = $url;
+		if (!$title && !$url) return false;
+
+		if (filter_var($url, FILTER_VALIDATE_URL) === false) return false;
+
+		$pdo = Db::pdo();
+
+		$pdo->beginTransaction();
+
+		// only check for our user data here, others might have shared this with different content etc
+		$sth = $pdo->prepare("SELECT id FROM ttrss_entries, ttrss_user_entries WHERE
+			guid = ? AND ref_id = id AND owner_uid = ? LIMIT 1");
+		$sth->execute([$guid, $owner_uid]);
+
+		if ($row = $sth->fetch()) {
+			$ref_id = $row['id'];
+
+			$sth = $pdo->prepare("SELECT int_id FROM ttrss_user_entries WHERE
+				ref_id = ? AND owner_uid = ? LIMIT 1");
+            $sth->execute([$ref_id, $owner_uid]);
+
+			if ($row = $sth->fetch()) {
+				$int_id = $row['int_id'];
+
+				$sth = $pdo->prepare("UPDATE ttrss_entries SET
+					content = ?, content_hash = ? WHERE id = ?");
+				$sth->execute([$content, $content_hash, $ref_id]);
+
+				if (Config::get(Config::DB_TYPE) == "pgsql") {
+					$sth = $pdo->prepare("UPDATE ttrss_entries
+					SET tsvector_combined = to_tsvector( :ts_content)
+					WHERE id = :id");
+					$params = [
+						":ts_content" => mb_substr(\Soundasleep\Html2Text::convert($content), 0, 900000),
+						":id" => $ref_id];
+					$sth->execute($params);
+				}
+
+				$sth = $pdo->prepare("UPDATE ttrss_user_entries SET published = true,
+						last_published = NOW() WHERE
+						int_id = ? AND owner_uid = ?");
+				$sth->execute([$int_id, $owner_uid]);
+
+			} else {
+
+				$sth = $pdo->prepare("INSERT INTO ttrss_user_entries
+					(ref_id, uuid, feed_id, orig_feed_id, owner_uid, published, tag_cache, label_cache,
+						last_read, note, unread, last_published)
+					VALUES
+					(?, '', NULL, NULL, ?, true, '', '', NOW(), '', false, NOW())");
+				$sth->execute([$ref_id, $owner_uid]);
+			}
+
+			if (count($labels) != 0) {
+				foreach ($labels as $label) {
+					Labels::add_article($ref_id, trim($label), $owner_uid);
+				}
+			}
+
+			$rc = true;
+
+		} else {
+			$sth = $pdo->prepare("INSERT INTO ttrss_entries
+				(title, guid, link, updated, content, content_hash, date_entered, date_updated)
+				VALUES
+				(?, ?, ?, NOW(), ?, ?, NOW(), NOW())");
+			$sth->execute([$title, $guid, $url, $content, $content_hash]);
+
+			$sth = $pdo->prepare("SELECT id FROM ttrss_entries WHERE guid = ?");
+			$sth->execute([$guid]);
+
+			if ($row = $sth->fetch()) {
+				$ref_id = $row["id"];
+				if (Config::get(Config::DB_TYPE) == "pgsql"){
+					$sth = $pdo->prepare("UPDATE ttrss_entries
+					SET tsvector_combined = to_tsvector( :ts_content)
+					WHERE id = :id");
+					$params = [
+						":ts_content" => mb_substr(\Soundasleep\Html2Text::convert($content), 0, 900000),
+						":id" => $ref_id];
+					$sth->execute($params);
+				}
+				$sth = $pdo->prepare("INSERT INTO ttrss_user_entries
+					(ref_id, uuid, feed_id, orig_feed_id, owner_uid, published, tag_cache, label_cache,
+						last_read, note, unread, last_published)
+					VALUES
+					(?, '', NULL, NULL, ?, true, '', '', NOW(), '', false, NOW())");
+				$sth->execute([$ref_id, $owner_uid]);
+
+				if (count($labels) != 0) {
+					foreach ($labels as $label) {
+						Labels::add_article($ref_id, trim($label), $owner_uid);
+					}
+				}
+
+				$rc = true;
+			}
+		}
+
+		$pdo->commit();
+
+		return $rc;
+	}
+
+	function printArticleTags(): void {
+		$id = (int) clean($_REQUEST['id'] ?? 0);
+
+		print json_encode(["id" => $id,
+			"tags" => self::_get_tags($id)]);
+	}
+
+	function setScore(): void {
+		$ids = array_map("intval", clean($_REQUEST['ids'] ?? []));
+		$score = (int)clean($_REQUEST['score']);
+
+		$ids_qmarks = arr_qmarks($ids);
+
+		$sth = $this->pdo->prepare("UPDATE ttrss_user_entries SET
+			score = ? WHERE ref_id IN ($ids_qmarks) AND owner_uid = ?");
+
+		$sth->execute([$score, ...$ids, $_SESSION['uid']]);
+
+		print json_encode(["id" => $ids, "score" => $score]);
+	}
+
+	function setArticleTags(): void {
+
+		$id = clean($_REQUEST["id"]);
+
+		//$tags_str = clean($_REQUEST["tags_str"]);
+		//$tags = array_unique(array_map('trim', explode(",", $tags_str)));
+
+		$tags = FeedItem_Common::normalize_categories(explode(",", clean($_REQUEST["tags_str"] ?? "")));
+
+		$this->pdo->beginTransaction();
+
+		$sth = $this->pdo->prepare("SELECT int_id FROM ttrss_user_entries WHERE
+				ref_id = ? AND owner_uid = ? LIMIT 1");
+		$sth->execute([$id, $_SESSION['uid']]);
+
+		if ($row = $sth->fetch()) {
+
+			$tags_to_cache = array();
+
+			$int_id = $row['int_id'];
+
+			$dsth = $this->pdo->prepare("DELETE FROM ttrss_tags WHERE
+				post_int_id = ? AND owner_uid = ?");
+			$dsth->execute([$int_id, $_SESSION['uid']]);
+
+			$csth = $this->pdo->prepare("SELECT post_int_id FROM ttrss_tags
+				WHERE post_int_id = ? AND owner_uid = ? AND tag_name = ?");
+
+			$usth = $this->pdo->prepare("INSERT INTO ttrss_tags
+				(post_int_id, owner_uid, tag_name)
+				VALUES (?, ?, ?)");
+
+			foreach ($tags as $tag) {
+				$csth->execute([$int_id, $_SESSION['uid'], $tag]);
+
+				if (!$csth->fetch()) {
+					$usth->execute([$int_id, $_SESSION['uid'], $tag]);
+				}
+
+				array_push($tags_to_cache, $tag);
+			}
+
+			/* update tag cache */
+
+			$tags_str = join(",", $tags_to_cache);
+
+			$sth = $this->pdo->prepare("UPDATE ttrss_user_entries
+				SET tag_cache = ? WHERE ref_id = ? AND owner_uid = ?");
+			$sth->execute([$tags_str, $id, $_SESSION['uid']]);
+		}
+
+		$this->pdo->commit();
+
+		// get latest tags from the database, original $tags is sometimes JSON-encoded as a hash ({}) - ???
+		print json_encode(["id" => (int)$id, "tags" => $this->_get_tags($id)]);
+	}
+
+	function completeTags(): void {
+		$search = clean($_REQUEST["search"]);
+
+		$sth = $this->pdo->prepare("SELECT DISTINCT tag_name FROM ttrss_tags
+				WHERE owner_uid = ? AND
+				tag_name LIKE ? ORDER BY tag_name
+				LIMIT 10");
+
+		$sth->execute([$_SESSION['uid'], "$search%"]);
+
+		$results = [];
+
+		while ($line = $sth->fetch()) {
+			array_push($results, $line["tag_name"]);
+		}
+
+		print json_encode($results);
+	}
+
+	function assigntolabel(): void {
+		$this->_label_ops(true);
+	}
+
+	function removefromlabel(): void {
+		$this->_label_ops(false);
+	}
+
+	private function _label_ops(bool $assign): void {
+		$reply = array();
+
+		$ids = array_map("intval", array_filter(explode(",", clean($_REQUEST["ids"] ?? "")), "strlen"));
+		$label_id = clean($_REQUEST["lid"]);
+
+		$label = Labels::find_caption($label_id, $_SESSION["uid"]);
+
+		$reply["labels-for"] = [];
+
+		if ($label) {
+			foreach ($ids as $id) {
+				if ($assign)
+					Labels::add_article($id, $label, $_SESSION["uid"]);
+				else
+					Labels::remove_article($id, $label, $_SESSION["uid"]);
+
+				array_push($reply["labels-for"],
+					["id" => (int)$id, "labels" => $this->_get_labels($id)]);
+			}
+		}
+
+		$reply["message"] = "UPDATE_COUNTERS";
+
+		print json_encode($reply);
+	}
+
+	/**
+	 * @param int $id article id
+	 * @return array{'formatted': string, 'entries': array<int, array<string, mixed>>}
+	 */
+	static function _format_enclosures(int $id, bool $always_display_enclosures, string $article_content, bool $hide_images = false): array {
+		$span = Tracer::start(__METHOD__);
+
+		$enclosures = self::_get_enclosures($id);
+		$enclosures_formatted = "";
+
+		/*foreach ($enclosures as &$enc) {
+			array_push($enclosures, [
+				"type" => $enc["content_type"],
+				"filename" => basename($enc["content_url"]),
+				"url" => $enc["content_url"],
+				"title" => $enc["title"],
+				"width" => (int) $enc["width"],
+				"height" => (int) $enc["height"]
+			]);
+		}*/
+
+		PluginHost::getInstance()->chain_hooks_callback(PluginHost::HOOK_FORMAT_ENCLOSURES,
+			function ($result) use (&$enclosures_formatted, &$enclosures) {
+				if (is_array($result)) {
+					$enclosures_formatted = $result[0];
+					$enclosures = $result[1];
+				} else {
+					$enclosures_formatted = $result;
+				}
+			},
+			$enclosures_formatted, $enclosures, $id, $always_display_enclosures, $article_content, $hide_images);
+
+		if (!empty($enclosures_formatted)) {
+			$span->end();
+			return [
+					'formatted' => $enclosures_formatted,
+					'entries' => []
+			];
+		}
+
+		$rv = [
+			'formatted' => '',
+			'entries' => []
+		];
+
+		$rv['can_inline'] = isset($_SESSION["uid"]) &&
+									empty($_SESSION["bw_limit"]) &&
+									!get_pref(Prefs::STRIP_IMAGES) &&
+									($always_display_enclosures || !preg_match("/<img/i", $article_content));
+
+		$rv['inline_text_only'] = $hide_images && $rv['can_inline'];
+
+		foreach ($enclosures as $enc) {
+
+			// this is highly approximate
+			$enc["filename"] = basename($enc["content_url"]);
+
+			$rendered_enc = "";
+			PluginHost::getInstance()->chain_hooks_callback(PluginHost::HOOK_RENDER_ENCLOSURE,
+				function ($result) use (&$rendered_enc) {
+					$rendered_enc = $result;
+				},
+				$enc, $id, $rv);
+
+			if ($rendered_enc) {
+				$rv['formatted'] .= $rendered_enc;
+			} else {
+				PluginHost::getInstance()->chain_hooks_callback(PluginHost::HOOK_ENCLOSURE_ENTRY,
+					function ($result) use (&$enc) {
+						$enc = $result;
+					},
+					$enc, $id, $rv);
+
+				array_push($rv['entries'], $enc);
+			}
+		}
+
+		$span->end();
+		return $rv;
+	}
+
+	/**
+	 * @return array<int, string>
+	 */
+	static function _get_tags(int $id, int $owner_uid = 0, ?string $tag_cache = null): array {
+		$span = Tracer::start(__METHOD__);
+
+		$a_id = $id;
+
+		if (!$owner_uid) $owner_uid = $_SESSION["uid"];
+
+		$pdo = Db::pdo();
+
+		$sth = $pdo->prepare("SELECT DISTINCT tag_name,
+			owner_uid as owner FROM	ttrss_tags
+			WHERE post_int_id = (SELECT int_id FROM ttrss_user_entries WHERE
+			ref_id = ? AND owner_uid = ? LIMIT 1) ORDER BY tag_name");
+
+		$tags = array();
+
+		/* check cache first */
+
+		if (!$tag_cache) {
+			$csth = $pdo->prepare("SELECT tag_cache FROM ttrss_user_entries
+				WHERE ref_id = ? AND owner_uid = ?");
+			$csth->execute([$id, $owner_uid]);
+
+			if ($row = $csth->fetch()) {
+				$tag_cache = $row["tag_cache"];
+			}
+		}
+
+		if ($tag_cache) {
+			$tags = explode(",", $tag_cache);
+		} else {
+
+			/* do it the hard way */
+
+			$sth->execute([$a_id, $owner_uid]);
+
+			while ($tmp_line = $sth->fetch()) {
+				array_push($tags, $tmp_line["tag_name"]);
+			}
+
+			/* update the cache */
+
+			$tags_str = join(",", $tags);
+
+			$sth = $pdo->prepare("UPDATE ttrss_user_entries
+				SET tag_cache = ? WHERE ref_id = ?
+				AND owner_uid = ?");
+			$sth->execute([$tags_str, $id, $owner_uid]);
+		}
+
+		$span->end();
+		return $tags;
+	}
+
+	function getmetadatabyid(): void {
+		$article = ORM::for_table('ttrss_entries')
+			->join('ttrss_user_entries', ['ref_id', '=', 'id'], 'ue')
+			->where('ue.owner_uid', $_SESSION['uid'])
+			->find_one((int)$_REQUEST['id']);
+
+		if ($article) {
+			echo json_encode(["link" => $article->link, "title" => $article->title]);
+		} else {
+			echo json_encode([]);
+		}
+	}
+
+	/**
+	 * @return array<int, array<string, mixed>>
+	 */
+	static function _get_enclosures(int $id): array {
+		$encs = ORM::for_table('ttrss_enclosures')
+			->where('post_id', $id)
+			->find_many();
+
+		$rv = [];
+
+		$cache = DiskCache::instance("images");
+
+		foreach ($encs as $enc) {
+			$cache_key = sha1($enc->content_url);
+
+			if ($cache->exists($cache_key)) {
+				$enc->content_url = $cache->get_url($cache_key);
+			}
+
+			array_push($rv, $enc->as_array());
+		}
+
+		return $rv;
+
+	}
+
+	static function _purge_orphans(): void {
+
+        // purge orphaned posts in main content table
+
+        if (Config::get(Config::DB_TYPE) == "mysql")
+            $limit_qpart = "LIMIT 5000";
+        else
+            $limit_qpart = "";
+
+        $pdo = Db::pdo();
+        $res = $pdo->query("DELETE FROM ttrss_entries WHERE
+			NOT EXISTS (SELECT ref_id FROM ttrss_user_entries WHERE ref_id = id) $limit_qpart");
+
+        if (Debug::enabled()) {
+            $rows = $res->rowCount();
+            Debug::log("Purged $rows orphaned posts.");
+        }
+    }
+
+	/**
+	 * @param array<int, int> $ids
+	 * @param int $cmode Article::CATCHUP_MODE_*
+	 */
+	static function _catchup_by_id($ids, int $cmode, ?int $owner_uid = null): void {
+
+		if (!$owner_uid) $owner_uid = $_SESSION["uid"];
+
+		$pdo = Db::pdo();
+
+		$ids_qmarks = arr_qmarks($ids);
+
+		if ($cmode == Article::CATCHUP_MODE_MARK_AS_UNREAD) {
+			$sth = $pdo->prepare("UPDATE ttrss_user_entries SET
+				unread = true
+					WHERE ref_id IN ($ids_qmarks) AND owner_uid = ?");
+		} else if ($cmode == Article::CATCHUP_MODE_TOGGLE) {
+			$sth = $pdo->prepare("UPDATE ttrss_user_entries SET
+				unread = NOT unread,last_read = NOW()
+					WHERE ref_id IN ($ids_qmarks) AND owner_uid = ?");
+		} else {
+			$sth = $pdo->prepare("UPDATE ttrss_user_entries SET
+				unread = false,last_read = NOW()
+					WHERE ref_id IN ($ids_qmarks) AND owner_uid = ?");
+		}
+
+		$sth->execute([...$ids, $owner_uid]);
+	}
+
+	/**
+	 * @return array<int, array<int, int|string>>
+	 */
+	static function _get_labels(int $id, ?int $owner_uid = null): array {
+		$span = Tracer::start(__METHOD__);
+
+		$rv = array();
+
+		if (!$owner_uid) $owner_uid = $_SESSION["uid"];
+
+		$pdo = Db::pdo();
+
+		$sth = $pdo->prepare("SELECT label_cache FROM
+			ttrss_user_entries WHERE ref_id = ? AND owner_uid = ?");
+		$sth->execute([$id, $owner_uid]);
+
+		if ($row = $sth->fetch()) {
+			$label_cache = $row["label_cache"];
+
+			if ($label_cache) {
+				$tmp = json_decode($label_cache, true);
+
+				if (empty($tmp) || ($tmp["no-labels"] ?? 0) == 1)
+					return $rv;
+				else
+					return $tmp;
+			}
+		}
+
+		$sth = $pdo->prepare("SELECT DISTINCT label_id,caption,fg_color,bg_color
+				FROM ttrss_labels2, ttrss_user_labels2
+			WHERE id = label_id
+				AND article_id = ?
+				AND owner_uid = ?
+			ORDER BY caption");
+		$sth->execute([$id, $owner_uid]);
+
+		while ($line = $sth->fetch()) {
+			$rk = array(Labels::label_to_feed_id($line["label_id"]),
+				$line["caption"], $line["fg_color"],
+				$line["bg_color"]);
+			array_push($rv, $rk);
+		}
+
+		if (count($rv) > 0)
+			// PHPStan has issues with the shape of $rv for some reason (array vs non-empty-array).
+			// @phpstan-ignore-next-line
+			Labels::update_cache($owner_uid, $id, $rv);
+		else
+			Labels::update_cache($owner_uid, $id, array("no-labels" => 1));
+
+		$span->end();
+
+		return $rv;
+	}
+
+	/**
+	 * @param array<int, array<string, mixed>> $enclosures
+	 * @param array<string, mixed> $headline
+	 *
+	 * @return array<int, Article::ARTICLE_KIND_*|string>
+	 */
+	static function _get_image(array $enclosures, string $content, string $site_url, array $headline) {
+		$span = Tracer::start(__METHOD__);
+
+		$article_image = "";
+		$article_stream = "";
+		$article_kind = 0;
+
+		PluginHost::getInstance()->chain_hooks_callback(PluginHost::HOOK_ARTICLE_IMAGE,
+			function ($result, $plugin) use (&$article_image, &$article_stream, &$content) {
+				list ($article_image, $article_stream, $content) = $result;
+
+				// run until first hard match
+				return !empty($article_image);
+			},
+			$enclosures, $content, $site_url, $headline);
+
+		if (!$article_image && !$article_stream) {
+			$tmpdoc = new DOMDocument();
+
+			if (@$tmpdoc->loadHTML('<?xml encoding="UTF-8">' . mb_substr($content, 0, 131070))) {
+				$tmpxpath = new DOMXPath($tmpdoc);
+				$elems = $tmpxpath->query('(//img[@src]|//video[@poster]|//iframe[contains(@src , "youtube.com/embed/")])');
+
+				foreach ($elems as $e) {
+					if ($e->nodeName == "iframe") {
+						$matches = [];
+						if ($rrr = preg_match("/\/embed\/([\w-]+)/", $e->getAttribute("src"), $matches)) {
+							$article_image = "https://img.youtube.com/vi/" . $matches[1] . "/hqdefault.jpg";
+							$article_stream = "https://youtu.be/" . $matches[1];
+							$article_kind = Article::ARTICLE_KIND_YOUTUBE;
+							break;
+						}
+					} else if ($e->nodeName == "video") {
+						$article_image = $e->getAttribute("poster");
+
+						/** @var DOMElement|null $src */
+						$src = $tmpxpath->query("//source[@src]", $e)->item(0);
+
+						if ($src) {
+							$article_stream = $src->getAttribute("src");
+							$article_kind = Article::ARTICLE_KIND_VIDEO;
+						}
+
+						break;
+					} else if ($e->nodeName == 'img') {
+						if (mb_strpos($e->getAttribute("src"), "data:") !== 0) {
+							$article_image = $e->getAttribute("src");
+						}
+						break;
+					}
+				}
+			}
+
+			if (!$article_image)
+				foreach ($enclosures as $enc) {
+					if (strpos($enc["content_type"], "image/") !== false) {
+						$article_image = $enc["content_url"];
+						break;
+					}
+				}
+
+			if ($article_image) {
+				$article_image = UrlHelper::rewrite_relative($site_url, $article_image);
+
+				if (!$article_kind && (count($enclosures) > 1 || (isset($elems) && $elems->length > 1)))
+					$article_kind = Article::ARTICLE_KIND_ALBUM;
+			}
+
+			if ($article_stream)
+				$article_stream = UrlHelper::rewrite_relative($site_url, $article_stream);
+		}
+
+		$cache = DiskCache::instance("images");
+
+		if ($article_image && $cache->exists(sha1($article_image)))
+			$article_image = $cache->get_url(sha1($article_image));
+
+		if ($article_stream && $cache->exists(sha1($article_stream)))
+			$article_stream = $cache->get_url(sha1($article_stream));
+
+		$span->end();
+
+		return [$article_image, $article_stream, $article_kind];
+	}
+
+	/**
+	 * only cached, returns label ids (not label feed ids)
+	 *
+	 * @param array<int, int> $article_ids
+	 * @return array<int, int>
+	 */
+	static function _labels_of(array $article_ids) {
+		if (count($article_ids) == 0)
+			return [];
+
+		$span = Tracer::start(__METHOD__);
+
+		$entries = ORM::for_table('ttrss_entries')
+			->table_alias('e')
+			->join('ttrss_user_entries', ['ref_id', '=', 'id'], 'ue')
+			->where_in('id', $article_ids)
+			->find_many();
+
+		$rv = [];
+
+		foreach ($entries as $entry) {
+			$labels = json_decode($entry->label_cache);
+
+			if (isset($labels) && is_array($labels)) {
+				foreach ($labels as $label) {
+					if (empty($label["no-labels"]))
+						array_push($rv, Labels::feed_to_label_id($label[0]));
+				}
+			}
+		}
+
+		$span->end();
+
+		return array_unique($rv);
+	}
+
+	/**
+	 * @param array<int, int> $article_ids
+	 * @return array<int, int>
+	 */
+	static function _feeds_of(array $article_ids) {
+		if (count($article_ids) == 0)
+			return [];
+
+		$span = Tracer::start(__METHOD__);
+
+		$entries = ORM::for_table('ttrss_entries')
+			->table_alias('e')
+			->join('ttrss_user_entries', ['ref_id', '=', 'id'], 'ue')
+			->where_in('id', $article_ids)
+			->find_many();
+
+		$rv = [];
+
+		foreach ($entries as $entry) {
+			array_push($rv, $entry->feed_id);
+		}
+
+		$span->end();
+
+		return array_unique($rv);
+	}
+}
-- 
cgit v1.2.3