wrap rssfuncs into rssutils class

1 files changed, 1577 insertions, 0 deletions

diff --git a/classes/rssutils.php b/classes/rssutils.php
new file mode 100644
index 000000000..84d6941da
--- /dev/null
+++ b/classes/rssutils.php
@@ -0,0 +1,1577 @@
+<?php
+define_default('DAEMON_UPDATE_LOGIN_LIMIT', 30);
+define_default('DAEMON_FEED_LIMIT', 500);
+define_default('DAEMON_SLEEP_INTERVAL', 120);
+define_default('_MIN_CACHE_FILE_SIZE', 1024);
+
+class RSSUtils {
+	static function calculate_article_hash($article, $pluginhost) {
+		$tmp = "";
+
+		foreach ($article as $k => $v) {
+			if ($k != "feed" && isset($v)) {
+				$x = strip_tags(is_array($v) ? implode(",", $v) : $v);
+
+				//_debug("$k:" . sha1($x) . ":" . htmlspecialchars($x), true);
+
+				$tmp .= sha1("$k:" . sha1($x));
+			}
+		}
+
+		return sha1(implode(",", $pluginhost->get_plugin_names()) . $tmp);
+	}
+
+	static function update_feedbrowser_cache() {
+
+		$result = db_query("SELECT feed_url, site_url, title, COUNT(id) AS subscribers
+			FROM ttrss_feeds WHERE feed_url NOT IN (SELECT feed_url FROM ttrss_feeds
+				WHERE private IS true OR auth_login != '' OR auth_pass != '' OR feed_url LIKE '%:%@%/%')
+				GROUP BY feed_url, site_url, title ORDER BY subscribers DESC LIMIT 1000");
+
+		db_query("BEGIN");
+
+		db_query("DELETE FROM ttrss_feedbrowser_cache");
+
+		$count = 0;
+
+		while ($line = db_fetch_assoc($result)) {
+			$subscribers = db_escape_string($line["subscribers"]);
+			$feed_url = db_escape_string($line["feed_url"]);
+			$title = db_escape_string($line["title"]);
+			$site_url = db_escape_string($line["site_url"]);
+
+			$tmp_result = db_query("SELECT subscribers FROM
+				ttrss_feedbrowser_cache WHERE feed_url = '$feed_url'");
+
+			if (db_num_rows($tmp_result) == 0) {
+
+				db_query("INSERT INTO ttrss_feedbrowser_cache
+					(feed_url, site_url, title, subscribers) VALUES ('$feed_url',
+						'$site_url', '$title', '$subscribers')");
+
+				++$count;
+
+			}
+
+		}
+
+		db_query("COMMIT");
+
+		return $count;
+
+	}
+
+	static function update_daemon_common($limit = DAEMON_FEED_LIMIT, $debug = true) {
+		// Process all other feeds using last_updated and interval parameters
+
+		$schema_version = get_schema_version();
+
+		if ($schema_version != SCHEMA_VERSION) {
+			die("Schema version is wrong, please upgrade the database.\n");
+		}
+
+		define('PREFS_NO_CACHE', true);
+
+		// Test if the user has loggued in recently. If not, it does not update its feeds.
+		if (!SINGLE_USER_MODE && DAEMON_UPDATE_LOGIN_LIMIT > 0) {
+			if (DB_TYPE == "pgsql") {
+				$login_thresh_qpart = "AND ttrss_users.last_login >= NOW() - INTERVAL '".DAEMON_UPDATE_LOGIN_LIMIT." days'";
+			} else {
+				$login_thresh_qpart = "AND ttrss_users.last_login >= DATE_SUB(NOW(), INTERVAL ".DAEMON_UPDATE_LOGIN_LIMIT." DAY)";
+			}
+		} else {
+			$login_thresh_qpart = "";
+		}
+
+		// Test if the feed need a update (update interval exceeded).
+		if (DB_TYPE == "pgsql") {
+			$update_limit_qpart = "AND ((
+					ttrss_feeds.update_interval = 0
+					AND ttrss_user_prefs.value != '-1'
+					AND ttrss_feeds.last_updated < NOW() - CAST((ttrss_user_prefs.value || ' minutes') AS INTERVAL)
+				) OR (
+					ttrss_feeds.update_interval > 0
+					AND ttrss_feeds.last_updated < NOW() - CAST((ttrss_feeds.update_interval || ' minutes') AS INTERVAL)
+				) OR (ttrss_feeds.last_updated IS NULL
+					AND ttrss_user_prefs.value != '-1')
+				OR (last_updated = '1970-01-01 00:00:00'
+					AND ttrss_user_prefs.value != '-1'))";
+		} else {
+			$update_limit_qpart = "AND ((
+					ttrss_feeds.update_interval = 0
+					AND ttrss_user_prefs.value != '-1'
+					AND ttrss_feeds.last_updated < DATE_SUB(NOW(), INTERVAL CONVERT(ttrss_user_prefs.value, SIGNED INTEGER) MINUTE)
+				) OR (
+					ttrss_feeds.update_interval > 0
+					AND ttrss_feeds.last_updated < DATE_SUB(NOW(), INTERVAL ttrss_feeds.update_interval MINUTE)
+				) OR (ttrss_feeds.last_updated IS NULL
+					AND ttrss_user_prefs.value != '-1')
+				OR (last_updated = '1970-01-01 00:00:00'
+					AND ttrss_user_prefs.value != '-1'))";
+		}
+
+		// Test if feed is currently being updated by another process.
+		if (DB_TYPE == "pgsql") {
+			$updstart_thresh_qpart = "AND (ttrss_feeds.last_update_started IS NULL OR ttrss_feeds.last_update_started < NOW() - INTERVAL '10 minutes')";
+		} else {
+			$updstart_thresh_qpart = "AND (ttrss_feeds.last_update_started IS NULL OR ttrss_feeds.last_update_started < DATE_SUB(NOW(), INTERVAL 10 MINUTE))";
+		}
+
+		// Test if there is a limit to number of updated feeds
+		$query_limit = "";
+		if($limit) $query_limit = sprintf("LIMIT %d", $limit);
+
+		// Update the least recently updated feeds first
+		$query_order = "ORDER BY last_updated";
+		if (DB_TYPE == "pgsql") $query_order .= " NULLS FIRST";
+
+		$query = "SELECT DISTINCT ttrss_feeds.feed_url, ttrss_feeds.last_updated
+			FROM
+				ttrss_feeds, ttrss_users, ttrss_user_prefs
+			WHERE
+				ttrss_feeds.owner_uid = ttrss_users.id
+				AND ttrss_user_prefs.profile IS NULL
+				AND ttrss_users.id = ttrss_user_prefs.owner_uid
+				AND ttrss_user_prefs.pref_name = 'DEFAULT_UPDATE_INTERVAL'
+				$login_thresh_qpart $update_limit_qpart
+				$updstart_thresh_qpart
+				$query_order $query_limit";
+
+		// We search for feed needing update.
+		$result = db_query($query);
+
+		if($debug) _debug(sprintf("Scheduled %d feeds to update...", db_num_rows($result)));
+
+		// Here is a little cache magic in order to minimize risk of double feed updates.
+		$feeds_to_update = array();
+		while ($line = db_fetch_assoc($result)) {
+			array_push($feeds_to_update, db_escape_string($line['feed_url']));
+		}
+
+		// We update the feed last update started date before anything else.
+		// There is no lag due to feed contents downloads
+		// It prevent an other process to update the same feed.
+
+		if(count($feeds_to_update) > 0) {
+			$feeds_quoted = array();
+
+			foreach ($feeds_to_update as $feed) {
+				array_push($feeds_quoted, "'" . db_escape_string($feed) . "'");
+			}
+
+			db_query(sprintf("UPDATE ttrss_feeds SET last_update_started = NOW()
+				WHERE feed_url IN (%s)", implode(',', $feeds_quoted)));
+		}
+
+		$nf = 0;
+		$bstarted = microtime(true);
+
+		$batch_owners = array();
+
+		// For each feed, we call the feed update function.
+		foreach ($feeds_to_update as $feed) {
+			if($debug) _debug("Base feed: $feed");
+
+			//update_rss_feed($line["id"], true);
+
+			// since we have the data cached, we can deal with other feeds with the same url
+
+			$tmp_result = db_query("SELECT DISTINCT ttrss_feeds.id,last_updated,ttrss_feeds.owner_uid
+			FROM ttrss_feeds, ttrss_users, ttrss_user_prefs WHERE
+				ttrss_user_prefs.owner_uid = ttrss_feeds.owner_uid AND
+				ttrss_users.id = ttrss_user_prefs.owner_uid AND
+				ttrss_user_prefs.pref_name = 'DEFAULT_UPDATE_INTERVAL' AND
+				ttrss_user_prefs.profile IS NULL AND
+				feed_url = '".db_escape_string($feed)."'
+				$update_limit_qpart
+				$login_thresh_qpart
+			ORDER BY ttrss_feeds.id $query_limit");
+
+			if (db_num_rows($tmp_result) > 0) {
+				while ($tline = db_fetch_assoc($tmp_result)) {
+					if($debug) _debug(" => " . $tline["last_updated"] . ", " . $tline["id"] . " " . $tline["owner_uid"]);
+
+					if (array_search($tline["owner_uid"], $batch_owners) === FALSE)
+						array_push($batch_owners, $tline["owner_uid"]);
+
+					$fstarted = microtime(true);
+					RSSUtils::update_rss_feed($tline["id"], true, false);
+					_debug_suppress(false);
+
+					_debug(sprintf("    %.4f (sec)", microtime(true) - $fstarted));
+
+					++$nf;
+				}
+			}
+		}
+
+		if ($nf > 0) {
+			_debug(sprintf("Processed %d feeds in %.4f (sec), %.4f (sec/feed avg)", $nf,
+				microtime(true) - $bstarted, (microtime(true) - $bstarted) / $nf));
+		}
+
+		foreach ($batch_owners as $owner_uid) {
+			_debug("Running housekeeping tasks for user $owner_uid...");
+
+			RSSUtils::housekeeping_user($owner_uid);
+		}
+
+		// Send feed digests by email if needed.
+		Digest::send_headlines_digests($debug);
+
+		return $nf;
+
+	}
+
+	// this is used when subscribing
+	static function set_basic_feed_info($feed) {
+
+		$feed = db_escape_string($feed);
+
+		$result = db_query("SELECT feed_url,auth_pass,auth_login,auth_pass_encrypted
+					FROM ttrss_feeds WHERE id = '$feed'");
+
+		$auth_pass_encrypted = sql_bool_to_bool(db_fetch_result($result,
+			0, "auth_pass_encrypted"));
+
+		$auth_login = db_fetch_result($result, 0, "auth_login");
+		$auth_pass = db_fetch_result($result, 0, "auth_pass");
+
+		if ($auth_pass_encrypted && function_exists("mcrypt_decrypt")) {
+			require_once "crypt.php";
+			$auth_pass = decrypt_string($auth_pass);
+		}
+
+		$fetch_url = db_fetch_result($result, 0, "feed_url");
+
+		$feed_data = fetch_file_contents($fetch_url, false,
+			$auth_login, $auth_pass, false,
+			FEED_FETCH_TIMEOUT,
+			0);
+
+		global $fetch_curl_used;
+
+		if (!$fetch_curl_used) {
+			$tmp = @gzdecode($feed_data);
+
+			if ($tmp) $feed_data = $tmp;
+		}
+
+		$feed_data = trim($feed_data);
+
+		$rss = new FeedParser($feed_data);
+		$rss->init();
+
+		if (!$rss->error()) {
+
+			$result = db_query("SELECT title, site_url FROM ttrss_feeds WHERE id = '$feed'");
+
+			$registered_title = db_fetch_result($result, 0, "title");
+			$orig_site_url = db_fetch_result($result, 0, "site_url");
+
+			$site_url = db_escape_string(mb_substr(rewrite_relative_url($fetch_url, $rss->get_link()), 0, 245));
+			$feed_title = db_escape_string(mb_substr($rss->get_title(), 0, 199));
+
+			if ($feed_title && (!$registered_title || $registered_title == "[Unknown]")) {
+				db_query("UPDATE ttrss_feeds SET
+					title = '$feed_title' WHERE id = '$feed'");
+			}
+
+			if ($site_url && $orig_site_url != $site_url) {
+				db_query("UPDATE ttrss_feeds SET
+							site_url = '$site_url' WHERE id = '$feed'");
+			}
+		}
+	}
+
+	/**
+	 * @SuppressWarnings(PHPMD.UnusedFormalParameter)
+	 */
+	static function update_rss_feed($feed, $no_cache = false) {
+
+		$debug_enabled = defined('DAEMON_EXTENDED_DEBUG') || $_REQUEST['xdebug'];
+
+		_debug_suppress(!$debug_enabled);
+		_debug("start", $debug_enabled);
+
+		$result = db_query("SELECT title FROM ttrss_feeds
+			WHERE id = '$feed'");
+
+		if (db_num_rows($result) == 0) {
+			_debug("feed $feed NOT FOUND/SKIPPED", $debug_enabled);
+			user_error("Attempt to update unknown/invalid feed $feed", E_USER_WARNING);
+			return false;
+		}
+
+		$title = db_fetch_result($result, 0, "title");
+
+		// feed was batch-subscribed or something, we need to get basic info
+		// this is not optimal currently as it fetches stuff separately TODO: optimize
+		if ($title == "[Unknown]") {
+			_debug("setting basic feed info for $feed...");
+			RSSUtils::set_basic_feed_info($feed);
+		}
+
+		$result = db_query("SELECT id,update_interval,auth_login,
+			feed_url,auth_pass,cache_images,
+			mark_unread_on_update, owner_uid,
+			pubsub_state, auth_pass_encrypted,
+			feed_language
+			FROM ttrss_feeds WHERE id = '$feed'");
+
+		$owner_uid = db_fetch_result($result, 0, "owner_uid");
+		$mark_unread_on_update = sql_bool_to_bool(db_fetch_result($result,
+			0, "mark_unread_on_update"));
+		$pubsub_state = db_fetch_result($result, 0, "pubsub_state");
+		$auth_pass_encrypted = sql_bool_to_bool(db_fetch_result($result,
+			0, "auth_pass_encrypted"));
+
+		db_query("UPDATE ttrss_feeds SET last_update_started = NOW()
+			WHERE id = '$feed'");
+
+		$auth_login = db_fetch_result($result, 0, "auth_login");
+		$auth_pass = db_fetch_result($result, 0, "auth_pass");
+
+		if ($auth_pass_encrypted && function_exists("mcrypt_decrypt")) {
+			require_once "crypt.php";
+			$auth_pass = decrypt_string($auth_pass);
+		}
+
+		$cache_images = sql_bool_to_bool(db_fetch_result($result, 0, "cache_images"));
+		$fetch_url = db_fetch_result($result, 0, "feed_url");
+		$feed_language = db_escape_string(mb_strtolower(db_fetch_result($result, 0, "feed_language")));
+		if (!$feed_language) $feed_language = 'english';
+
+		$feed = db_escape_string($feed);
+
+		$date_feed_processed = date('Y-m-d H:i');
+
+		$cache_filename = CACHE_DIR . "/simplepie/" . sha1($fetch_url) . ".xml";
+
+		$pluginhost = new PluginHost();
+		$pluginhost->set_debug($debug_enabled);
+		$user_plugins = get_pref("_ENABLED_PLUGINS", $owner_uid);
+
+		$pluginhost->load(PLUGINS, PluginHost::KIND_ALL);
+		$pluginhost->load($user_plugins, PluginHost::KIND_USER, $owner_uid);
+		$pluginhost->load_data();
+
+		$rss_hash = false;
+
+		$force_refetch = isset($_REQUEST["force_refetch"]);
+		$feed_data = "";
+
+		foreach ($pluginhost->get_hooks(PluginHost::HOOK_FETCH_FEED) as $plugin) {
+			$feed_data = $plugin->hook_fetch_feed($feed_data, $fetch_url, $owner_uid, $feed, 0, $auth_login, $auth_pass);
+		}
+
+		// try cache
+		if (!$feed_data &&
+			file_exists($cache_filename) &&
+			is_readable($cache_filename) &&
+			!$auth_login && !$auth_pass &&
+			filemtime($cache_filename) > time() - 30) {
+
+			_debug("using local cache [$cache_filename].", $debug_enabled);
+
+			@$feed_data = file_get_contents($cache_filename);
+
+			if ($feed_data) {
+				$rss_hash = sha1($feed_data);
+			}
+
+		} else {
+			_debug("local cache will not be used for this feed", $debug_enabled);
+		}
+
+		// fetch feed from source
+		if (!$feed_data) {
+			_debug("fetching [$fetch_url]...", $debug_enabled);
+
+			if (ini_get("open_basedir") && function_exists("curl_init")) {
+				_debug("not using CURL due to open_basedir restrictions");
+			}
+
+			$feed_data = fetch_file_contents($fetch_url, false,
+				$auth_login, $auth_pass, false,
+				$no_cache ? FEED_FETCH_NO_CACHE_TIMEOUT : FEED_FETCH_TIMEOUT,
+				0);
+
+			global $fetch_curl_used;
+
+			if (!$fetch_curl_used) {
+				$tmp = @gzdecode($feed_data);
+
+				if ($tmp) $feed_data = $tmp;
+			}
+
+			$feed_data = trim($feed_data);
+
+			_debug("fetch done.", $debug_enabled);
+
+			// cache vanilla feed data for re-use
+			if ($feed_data && !$auth_pass && !$auth_login && is_writable(CACHE_DIR . "/simplepie")) {
+				$new_rss_hash = sha1($feed_data);
+
+				if ($new_rss_hash != $rss_hash) {
+					_debug("saving $cache_filename", $debug_enabled);
+					@file_put_contents($cache_filename, $feed_data);
+				}
+			}
+		}
+
+		if (!$feed_data) {
+			global $fetch_last_error;
+			global $fetch_last_error_code;
+
+			_debug("unable to fetch: $fetch_last_error [$fetch_last_error_code]", $debug_enabled);
+
+			$error_escaped = '';
+
+			// If-Modified-Since
+			if ($fetch_last_error_code != 304) {
+				$error_escaped = db_escape_string($fetch_last_error);
+			} else {
+				_debug("source claims data not modified, nothing to do.", $debug_enabled);
+			}
+
+			db_query(
+				"UPDATE ttrss_feeds SET last_error = '$error_escaped',
+					last_updated = NOW() WHERE id = '$feed'");
+
+			return;
+		}
+
+		foreach ($pluginhost->get_hooks(PluginHost::HOOK_FEED_FETCHED) as $plugin) {
+			$feed_data = $plugin->hook_feed_fetched($feed_data, $fetch_url, $owner_uid, $feed);
+		}
+
+		$rss = new FeedParser($feed_data);
+		$rss->init();
+
+		$feed = db_escape_string($feed);
+
+		if (!$rss->error()) {
+
+			// We use local pluginhost here because we need to load different per-user feed plugins
+			$pluginhost->run_hooks(PluginHost::HOOK_FEED_PARSED, "hook_feed_parsed", $rss);
+
+			_debug("language: $feed_language", $debug_enabled);
+			_debug("processing feed data...", $debug_enabled);
+
+//			db_query("BEGIN");
+
+			if (DB_TYPE == "pgsql") {
+				$favicon_interval_qpart = "favicon_last_checked < NOW() - INTERVAL '12 hour'";
+			} else {
+				$favicon_interval_qpart = "favicon_last_checked < DATE_SUB(NOW(), INTERVAL 12 HOUR)";
+			}
+
+			$result = db_query("SELECT owner_uid,favicon_avg_color,
+				(favicon_last_checked IS NULL OR $favicon_interval_qpart) AS
+						favicon_needs_check
+				FROM ttrss_feeds WHERE id = '$feed'");
+
+			$favicon_needs_check = sql_bool_to_bool(db_fetch_result($result, 0,
+				"favicon_needs_check"));
+			$favicon_avg_color = db_fetch_result($result, 0, "favicon_avg_color");
+
+			$owner_uid = db_fetch_result($result, 0, "owner_uid");
+
+			$site_url = db_escape_string(mb_substr(rewrite_relative_url($fetch_url, $rss->get_link()), 0, 245));
+
+			_debug("site_url: $site_url", $debug_enabled);
+			_debug("feed_title: " . $rss->get_title(), $debug_enabled);
+
+			if ($favicon_needs_check || $force_refetch) {
+
+				/* terrible hack: if we crash on floicon shit here, we won't check
+				 * the icon avgcolor again (unless the icon got updated) */
+
+				$favicon_file = ICONS_DIR . "/$feed.ico";
+				$favicon_modified = @filemtime($favicon_file);
+
+				_debug("checking favicon...", $debug_enabled);
+
+				RSSUtils::check_feed_favicon($site_url, $feed);
+				$favicon_modified_new = @filemtime($favicon_file);
+
+				if ($favicon_modified_new > $favicon_modified)
+					$favicon_avg_color = '';
+
+				if (file_exists($favicon_file) && function_exists("imagecreatefromstring") && $favicon_avg_color == '') {
+					require_once "colors.php";
+
+					db_query("UPDATE ttrss_feeds SET favicon_avg_color = 'fail' WHERE
+							id = '$feed'");
+
+					$favicon_color = db_escape_string(
+						calculate_avg_color($favicon_file));
+
+					$favicon_colorstring = ",favicon_avg_color = '".$favicon_color."'";
+				} else if ($favicon_avg_color == 'fail') {
+					_debug("floicon failed on this file, not trying to recalculate avg color", $debug_enabled);
+				}
+
+				db_query("UPDATE ttrss_feeds SET favicon_last_checked = NOW()
+					$favicon_colorstring
+					WHERE id = '$feed'");
+			}
+
+			_debug("loading filters & labels...", $debug_enabled);
+
+			$filters = load_filters($feed, $owner_uid);
+
+			_debug("" . count($filters) . " filters loaded.", $debug_enabled);
+
+			$items = $rss->get_items();
+
+			if (!is_array($items)) {
+				_debug("no articles found.", $debug_enabled);
+
+				db_query("UPDATE ttrss_feeds
+					SET last_updated = NOW(), last_error = '' WHERE id = '$feed'");
+
+				return; // no articles
+			}
+
+			if ($pubsub_state != 2 && PUBSUBHUBBUB_ENABLED) {
+
+				_debug("checking for PUSH hub...", $debug_enabled);
+
+				$feed_hub_url = false;
+
+				$links = $rss->get_links('hub');
+
+				if ($links && is_array($links)) {
+					foreach ($links as $l) {
+						$feed_hub_url = $l;
+						break;
+					}
+				}
+
+				_debug("feed hub url: $feed_hub_url", $debug_enabled);
+
+				$feed_self_url = $fetch_url;
+
+				$links = $rss->get_links('self');
+
+				if ($links && is_array($links)) {
+					foreach ($links as $l) {
+						$feed_self_url = $l;
+						break;
+					}
+				}
+
+				_debug("feed self url = $feed_self_url");
+
+				if ($feed_hub_url && $feed_self_url && function_exists('curl_init') &&
+					!ini_get("open_basedir")) {
+
+					require_once 'lib/pubsubhubbub/Subscriber.php';
+
+					$callback_url = get_self_url_prefix() .
+						"/public.php?op=pubsub&id=$feed";
+
+					$s = new Pubsubhubbub\Subscriber\Subscriber($feed_hub_url, $callback_url);
+
+					$rc = $s->subscribe($feed_self_url);
+
+					_debug("feed hub url found, subscribe request sent. [rc=$rc]", $debug_enabled);
+
+					db_query("UPDATE ttrss_feeds SET pubsub_state = 1
+						WHERE id = '$feed'");
+				}
+			}
+
+			_debug("processing articles...", $debug_enabled);
+
+			$tstart = time();
+
+			foreach ($items as $item) {
+				if ($_REQUEST['xdebug'] == 3) {
+					print_r($item);
+				}
+
+				if (ini_get("max_execution_time") > 0 && time() - $tstart >= ini_get("max_execution_time") * 0.7) {
+					_debug("looks like there's too many articles to process at once, breaking out", $debug_enabled);
+					break;
+				}
+
+				$entry_guid = $item->get_id();
+				if (!$entry_guid) $entry_guid = $item->get_link();
+				if (!$entry_guid) $entry_guid = RSSUtils::make_guid_from_title($item->get_title());
+				if (!$entry_guid) continue;
+
+				$entry_guid = "$owner_uid,$entry_guid";
+
+				$entry_guid_hashed = db_escape_string('SHA1:' . sha1($entry_guid));
+
+				_debug("guid $entry_guid / $entry_guid_hashed", $debug_enabled);
+
+				$entry_timestamp = "";
+
+				$entry_timestamp = $item->get_date();
+
+				_debug("orig date: " . $item->get_date(), $debug_enabled);
+
+				if ($entry_timestamp == -1 || !$entry_timestamp || $entry_timestamp > time()) {
+					$entry_timestamp = time();
+				}
+
+				$entry_timestamp_fmt = strftime("%Y/%m/%d %H:%M:%S", $entry_timestamp);
+
+				_debug("date $entry_timestamp [$entry_timestamp_fmt]", $debug_enabled);
+
+//				$entry_title = html_entity_decode($item->get_title(), ENT_COMPAT, 'UTF-8');
+//				$entry_title = decode_numeric_entities($entry_title);
+				$entry_title = $item->get_title();
+
+				$entry_link = rewrite_relative_url($site_url, $item->get_link());
+
+				_debug("title $entry_title", $debug_enabled);
+				_debug("link $entry_link", $debug_enabled);
+
+				if (!$entry_title) $entry_title = date("Y-m-d H:i:s", $entry_timestamp);;
+
+				$entry_content = $item->get_content();
+				if (!$entry_content) $entry_content = $item->get_description();
+
+				if ($_REQUEST["xdebug"] == 2) {
+					print "content: ";
+					print htmlspecialchars($entry_content);
+					print "\n";
+				}
+
+				$entry_comments = db_escape_string(mb_substr($item->get_comments_url(), 0, 245));
+				$num_comments = (int) $item->get_comments_count();
+
+				$entry_author = $item->get_author(); // escaped later
+				$entry_guid = db_escape_string(mb_substr($entry_guid, 0, 245));
+
+				_debug("author $entry_author", $debug_enabled);
+				_debug("num_comments: $num_comments", $debug_enabled);
+				_debug("looking for tags...", $debug_enabled);
+
+				// parse <category> entries into tags
+
+				$additional_tags = array();
+
+				$additional_tags_src = $item->get_categories();
+
+				if (is_array($additional_tags_src)) {
+					foreach ($additional_tags_src as $tobj) {
+						array_push($additional_tags, $tobj);
+					}
+				}
+
+				$entry_tags = array_unique($additional_tags);
+
+				for ($i = 0; $i < count($entry_tags); $i++)
+					$entry_tags[$i] = mb_strtolower($entry_tags[$i], 'utf-8');
+
+				_debug("tags found: " . join(",", $entry_tags), $debug_enabled);
+
+				_debug("done collecting data.", $debug_enabled);
+
+				$result = db_query("SELECT id, content_hash, lang FROM ttrss_entries
+					WHERE guid = '".db_escape_string($entry_guid)."' OR guid = '$entry_guid_hashed'");
+
+				if (db_num_rows($result) != 0) {
+					$base_entry_id = db_fetch_result($result, 0, "id");
+					$entry_stored_hash = db_fetch_result($result, 0, "content_hash");
+					$article_labels = Article::get_article_labels($base_entry_id, $owner_uid);
+					$entry_language = db_fetch_result($result, 0, "lang");
+
+					$existing_tags = Article::get_article_tags($base_entry_id, $owner_uid);
+					$entry_tags = array_unique(array_merge($entry_tags, $existing_tags));
+
+				} else {
+					$base_entry_id = false;
+					$entry_stored_hash = "";
+					$article_labels = array();
+					$entry_language = "";
+				}
+
+				$article = array("owner_uid" => $owner_uid, // read only
+					"guid" => $entry_guid, // read only
+					"guid_hashed" => $entry_guid_hashed, // read only
+					"title" => $entry_title,
+					"content" => $entry_content,
+					"link" => $entry_link,
+					"labels" => $article_labels, // current limitation: can add labels to article, can't remove them
+					"tags" => $entry_tags,
+					"author" => $entry_author,
+					"force_catchup" => false, // ugly hack for the time being
+					"score_modifier" => 0, // no previous value, plugin should recalculate score modifier based on content if needed
+					"language" => $entry_language,
+					"feed" => array("id" => $feed,
+						"fetch_url" => $fetch_url,
+						"site_url" => $site_url,
+						"cache_images" => $cache_images)
+				);
+
+				$entry_plugin_data = "";
+				$entry_current_hash = RSSUtils::calculate_article_hash($article, $pluginhost);
+
+				_debug("article hash: $entry_current_hash [stored=$entry_stored_hash]", $debug_enabled);
+
+				if ($entry_current_hash == $entry_stored_hash && !isset($_REQUEST["force_rehash"])) {
+					_debug("stored article seems up to date [IID: $base_entry_id], updating timestamp only", $debug_enabled);
+
+					// we keep encountering the entry in feeds, so we need to
+					// update date_updated column so that we don't get horrible
+					// dupes when the entry gets purged and reinserted again e.g.
+					// in the case of SLOW SLOW OMG SLOW updating feeds
+
+					$base_entry_id = db_fetch_result($result, 0, "id");
+
+					db_query("UPDATE ttrss_entries SET date_updated = NOW()
+						WHERE id = '$base_entry_id'");
+
+					continue;
+				}
+
+				_debug("hash differs, applying plugin filters:", $debug_enabled);
+
+				foreach ($pluginhost->get_hooks(PluginHost::HOOK_ARTICLE_FILTER) as $plugin) {
+					_debug("... " . get_class($plugin), $debug_enabled);
+
+					$start = microtime(true);
+					$article = $plugin->hook_article_filter($article);
+
+					_debug("=== " . sprintf("%.4f (sec)", microtime(true) - $start), $debug_enabled);
+
+					$entry_plugin_data .= mb_strtolower(get_class($plugin)) . ",";
+				}
+
+				if ($_REQUEST["xdebug"] == 2) {
+					print "processed content: ";
+					print htmlspecialchars($article["content"]);
+					print "\n";
+				}
+
+				$entry_plugin_data = db_escape_string($entry_plugin_data);
+
+				_debug("plugin data: $entry_plugin_data", $debug_enabled);
+
+				// Workaround: 4-byte unicode requires utf8mb4 in MySQL. See https://tt-rss.org/forum/viewtopic.php?f=1&t=3377&p=20077#p20077
+				if (DB_TYPE == "mysql") {
+					foreach ($article as $k => $v) {
+
+						// i guess we'll have to take the risk of 4byte unicode labels & tags here
+						if (is_string($article[$k])) {
+							$article[$k] = preg_replace('/[\x{10000}-\x{10FFFF}]/u', "\xEF\xBF\xBD", $v);
+						}
+					}
+				}
+
+				/* Collect article tags here so we could filter by them: */
+
+				$matched_rules = array();
+
+				$article_filters = RSSUtils::get_article_filters($filters, $article["title"],
+					$article["content"], $article["link"], $article["author"],
+					$article["tags"], $matched_rules);
+
+				if ($debug_enabled) {
+					_debug("matched filter rules: ", $debug_enabled);
+
+					if (count($matched_rules) != 0) {
+						print_r($matched_rules);
+					}
+
+					_debug("filter actions: ", $debug_enabled);
+
+					if (count($article_filters) != 0) {
+						print_r($article_filters);
+					}
+				}
+
+				$plugin_filter_names = RSSUtils::find_article_filters($article_filters, "plugin");
+				$plugin_filter_actions = $pluginhost->get_filter_actions();
+
+				if (count($plugin_filter_names) > 0) {
+					_debug("applying plugin filter actions...", $debug_enabled);
+
+					foreach ($plugin_filter_names as $pfn) {
+						list($pfclass,$pfaction) = explode(":", $pfn["param"]);
+
+						if (isset($plugin_filter_actions[$pfclass])) {
+							$plugin = $pluginhost->get_plugin($pfclass);
+
+							_debug("... $pfclass: $pfaction", $debug_enabled);
+
+							if ($plugin) {
+								$start = microtime(true);
+								$article = $plugin->hook_article_filter_action($article, $pfaction);
+
+								_debug("=== " . sprintf("%.4f (sec)", microtime(true) - $start), $debug_enabled);
+							} else {
+								_debug("??? $pfclass: plugin object not found.");
+							}
+						} else {
+							_debug("??? $pfclass: filter plugin not registered.");
+						}
+					}
+				}
+
+				$entry_tags = $article["tags"];
+				$entry_guid = db_escape_string($entry_guid);
+				$entry_title = db_escape_string($article["title"]);
+				$entry_author = db_escape_string(mb_substr($article["author"], 0, 245));
+				$entry_link = db_escape_string($article["link"]);
+				$entry_content = $article["content"]; // escaped below
+				$entry_force_catchup = $article["force_catchup"];
+				$article_labels = $article["labels"];
+				$entry_score_modifier = (int) $article["score_modifier"];
+				$entry_language = db_escape_string($article["language"]);
+
+				if ($debug_enabled) {
+					_debug("article labels:", $debug_enabled);
+
+					if (count($article_labels) != 0) {
+						print_r($article_labels);
+					}
+				}
+
+				_debug("force catchup: $entry_force_catchup");
+
+				if ($cache_images && is_writable(CACHE_DIR . '/images'))
+					RSSUtils::cache_media($entry_content, $site_url, $debug_enabled);
+
+				$entry_content = db_escape_string($entry_content, false);
+
+				//db_query("BEGIN");
+
+				$result = db_query("SELECT id FROM	ttrss_entries
+					WHERE (guid = '$entry_guid' OR guid = '$entry_guid_hashed')");
+
+				if (db_num_rows($result) == 0) {
+
+					_debug("base guid [$entry_guid or $entry_guid_hashed] not found, creating...", $debug_enabled);
+
+					// base post entry does not exist, create it
+
+					db_query(
+						"INSERT INTO ttrss_entries
+							(title,
+							guid,
+							link,
+							updated,
+							content,
+							content_hash,
+							no_orig_date,
+							date_updated,
+							date_entered,
+							comments,
+							num_comments,
+							plugin_data,
+							lang,
+							author)
+						VALUES
+							('$entry_title',
+							'$entry_guid_hashed',
+							'$entry_link',
+							'$entry_timestamp_fmt',
+							'$entry_content',
+							'$entry_current_hash',
+							false,
+							NOW(),
+							'$date_feed_processed',
+							'$entry_comments',
+							'$num_comments',
+							'$entry_plugin_data',
+							'$entry_language',
+							'$entry_author')");
+
+				}
+
+				// now it should exist, if not - bad luck then
+
+				$result = db_query("SELECT id FROM ttrss_entries
+					WHERE guid = '$entry_guid' OR guid = '$entry_guid_hashed'");
+
+				$entry_ref_id = 0;
+				$entry_int_id = 0;
+
+				if (db_num_rows($result) == 1) {
+
+					_debug("base guid found, checking for user record", $debug_enabled);
+
+					$ref_id = db_fetch_result($result, 0, "id");
+					$entry_ref_id = $ref_id;
+
+					/* $stored_guid = db_fetch_result($result, 0, "guid");
+					if ($stored_guid != $entry_guid_hashed) {
+						if ($debug_enabled) _debug("upgrading compat guid to hashed one", $debug_enabled);
+
+						db_query("UPDATE ttrss_entries SET guid = '$entry_guid_hashed' WHERE
+							id = '$ref_id'");
+					} */
+
+					if (RSSUtils::find_article_filter($article_filters, "filter")) {
+						//db_query("COMMIT"); // close transaction in progress
+						continue;
+					}
+
+					$score = RSSUtils::calculate_article_score($article_filters) + $entry_score_modifier;
+
+					_debug("initial score: $score [including plugin modifier: $entry_score_modifier]", $debug_enabled);
+
+					// check for user post link to main table
+
+					$query = "SELECT ref_id, int_id FROM ttrss_user_entries WHERE
+							ref_id = '$ref_id' AND owner_uid = '$owner_uid'";
+
+//					if ($_REQUEST["xdebug"]) print "$query\n";
+
+					$result = db_query($query);
+
+					// okay it doesn't exist - create user entry
+					if (db_num_rows($result) == 0) {
+
+						_debug("user record not found, creating...", $debug_enabled);
+
+						if ($score >= -500 && !RSSUtils::find_article_filter($article_filters, 'catchup') && !$entry_force_catchup) {
+							$unread = 'true';
+							$last_read_qpart = 'NULL';
+						} else {
+							$unread = 'false';
+							$last_read_qpart = 'NOW()';
+						}
+
+						if (RSSUtils::find_article_filter($article_filters, 'mark') || $score > 1000) {
+							$marked = 'true';
+						} else {
+							$marked = 'false';
+						}
+
+						if (RSSUtils::find_article_filter($article_filters, 'publish')) {
+							$published = 'true';
+						} else {
+							$published = 'false';
+						}
+
+						$last_marked = ($marked == 'true') ? 'NOW()' : 'NULL';
+						$last_published = ($published == 'true') ? 'NOW()' : 'NULL';
+
+						$result = db_query(
+							"INSERT INTO ttrss_user_entries
+								(ref_id, owner_uid, feed_id, unread, last_read, marked,
+								published, score, tag_cache, label_cache, uuid,
+								last_marked, last_published)
+							VALUES ('$ref_id', '$owner_uid', '$feed', $unread,
+								$last_read_qpart, $marked, $published, '$score', '', '',
+								'', $last_marked, $last_published)");
+
+						if (PUBSUBHUBBUB_HUB && $published == 'true') {
+							$rss_link = get_self_url_prefix() .
+								"/public.php?op=rss&id=-2&key=" .
+								get_feed_access_key(-2, false, $owner_uid);
+
+							$p = new pubsubhubbub\publisher\Publisher(PUBSUBHUBBUB_HUB);
+
+							/* $pubsub_result = */ $p->publish_update($rss_link);
+						}
+
+						$result = db_query(
+							"SELECT int_id FROM ttrss_user_entries WHERE
+								ref_id = '$ref_id' AND owner_uid = '$owner_uid' AND
+								feed_id = '$feed' LIMIT 1");
+
+						if (db_num_rows($result) == 1) {
+							$entry_int_id = db_fetch_result($result, 0, "int_id");
+						}
+					} else {
+						_debug("user record FOUND", $debug_enabled);
+
+						$entry_ref_id = db_fetch_result($result, 0, "ref_id");
+						$entry_int_id = db_fetch_result($result, 0, "int_id");
+					}
+
+					_debug("RID: $entry_ref_id, IID: $entry_int_id", $debug_enabled);
+
+					if (DB_TYPE == "pgsql") {
+						$tsvector_combined = db_escape_string(mb_substr($entry_title . ' ' . strip_tags(str_replace('<', ' <', $entry_content)),
+							0, 1000000));
+
+						$tsvector_qpart = "tsvector_combined = to_tsvector('$feed_language', '$tsvector_combined'),";
+
+					} else {
+						$tsvector_qpart = "";
+					}
+
+					db_query("UPDATE ttrss_entries
+						SET title = '$entry_title',
+							content = '$entry_content',
+							content_hash = '$entry_current_hash',
+							updated = '$entry_timestamp_fmt',
+							$tsvector_qpart
+							num_comments = '$num_comments',
+							plugin_data = '$entry_plugin_data',
+							author = '$entry_author',
+							lang = '$entry_language'
+						WHERE id = '$ref_id'");
+
+					// update aux data
+					db_query("UPDATE ttrss_user_entries
+							SET score = '$score' WHERE ref_id = '$ref_id'");
+
+					if ($mark_unread_on_update) {
+						_debug("article updated, marking unread as requested.", $debug_enabled);
+
+						db_query("UPDATE ttrss_user_entries
+							SET last_read = null, unread = true WHERE ref_id = '$ref_id'");
+					}
+				}
+
+				//db_query("COMMIT");
+
+				_debug("assigning labels [other]...", $debug_enabled);
+
+				foreach ($article_labels as $label) {
+					Labels::add_article($entry_ref_id, $label[1], $owner_uid);
+				}
+
+				_debug("assigning labels [filters]...", $debug_enabled);
+
+				RSSUtils::assign_article_to_label_filters($entry_ref_id, $article_filters,
+					$owner_uid, $article_labels);
+
+				_debug("looking for enclosures...", $debug_enabled);
+
+				// enclosures
+
+				$enclosures = array();
+
+				$encs = $item->get_enclosures();
+
+				if (is_array($encs)) {
+					foreach ($encs as $e) {
+						$e_item = array(
+							rewrite_relative_url($site_url, $e->link),
+							$e->type, $e->length, $e->title, $e->width, $e->height);
+						array_push($enclosures, $e_item);
+					}
+				}
+
+				if ($cache_images && is_writable(CACHE_DIR . '/images'))
+					RSSUtils::cache_enclosures($enclosures, $site_url, $debug_enabled);
+
+				if ($debug_enabled) {
+					_debug("article enclosures:", $debug_enabled);
+					print_r($enclosures);
+				}
+
+				//db_query("BEGIN");
+
+//				debugging
+//				db_query("DELETE FROM ttrss_enclosures WHERE post_id = '$entry_ref_id'");
+
+				foreach ($enclosures as $enc) {
+					$enc_url = db_escape_string($enc[0]);
+					$enc_type = db_escape_string($enc[1]);
+					$enc_dur = db_escape_string($enc[2]);
+					$enc_title = db_escape_string($enc[3]);
+					$enc_width = intval($enc[4]);
+					$enc_height = intval($enc[5]);
+
+					$result = db_query("SELECT id FROM ttrss_enclosures
+						WHERE content_url = '$enc_url' AND post_id = '$entry_ref_id'");
+
+					if (db_num_rows($result) == 0) {
+						db_query("INSERT INTO ttrss_enclosures
+							(content_url, content_type, title, duration, post_id, width, height) VALUES
+							('$enc_url', '$enc_type', '$enc_title', '$enc_dur', '$entry_ref_id', $enc_width, $enc_height)");
+					}
+				}
+
+				//db_query("COMMIT");
+
+				// check for manual tags (we have to do it here since they're loaded from filters)
+
+				foreach ($article_filters as $f) {
+					if ($f["type"] == "tag") {
+
+						$manual_tags = trim_array(explode(",", $f["param"]));
+
+						foreach ($manual_tags as $tag) {
+							if (tag_is_valid($tag)) {
+								array_push($entry_tags, $tag);
+							}
+						}
+					}
+				}
+
+				// Skip boring tags
+
+				$boring_tags = trim_array(explode(",", mb_strtolower(get_pref(
+					'BLACKLISTED_TAGS', $owner_uid, ''), 'utf-8')));
+
+				$filtered_tags = array();
+				$tags_to_cache = array();
+
+				if ($entry_tags && is_array($entry_tags)) {
+					foreach ($entry_tags as $tag) {
+						if (array_search($tag, $boring_tags) === false) {
+							array_push($filtered_tags, $tag);
+						}
+					}
+				}
+
+				$filtered_tags = array_unique($filtered_tags);
+
+				if ($debug_enabled) {
+					_debug("filtered article tags:", $debug_enabled);
+					print_r($filtered_tags);
+				}
+
+				// Save article tags in the database
+
+				if (count($filtered_tags) > 0) {
+
+					//db_query("BEGIN");
+
+					foreach ($filtered_tags as $tag) {
+
+						$tag = sanitize_tag($tag);
+						$tag = db_escape_string($tag);
+
+						if (!tag_is_valid($tag)) continue;
+
+						$result = db_query("SELECT id FROM ttrss_tags
+							WHERE tag_name = '$tag' AND post_int_id = '$entry_int_id' AND
+							owner_uid = '$owner_uid' LIMIT 1");
+
+						if ($result && db_num_rows($result) == 0) {
+
+							db_query("INSERT INTO ttrss_tags
+									(owner_uid,tag_name,post_int_id)
+									VALUES ('$owner_uid','$tag', '$entry_int_id')");
+						}
+
+						array_push($tags_to_cache, $tag);
+					}
+
+					/* update the cache */
+
+					$tags_to_cache = array_unique($tags_to_cache);
+
+					$tags_str = db_escape_string(join(",", $tags_to_cache));
+
+					db_query("UPDATE ttrss_user_entries
+						SET tag_cache = '$tags_str' WHERE ref_id = '$entry_ref_id'
+						AND owner_uid = $owner_uid");
+
+					//db_query("COMMIT");
+				}
+
+				_debug("article processed", $debug_enabled);
+			}
+
+			_debug("purging feed...", $debug_enabled);
+
+			purge_feed($feed, 0, $debug_enabled);
+
+			db_query("UPDATE ttrss_feeds
+				SET last_updated = NOW(), last_error = '' WHERE id = '$feed'");
+
+//			db_query("COMMIT");
+
+		} else {
+
+			$error_msg = db_escape_string(mb_substr($rss->error(), 0, 245));
+
+			_debug("fetch error: $error_msg", $debug_enabled);
+
+			if (count($rss->errors()) > 1) {
+				foreach ($rss->errors() as $error) {
+					_debug("+ $error");
+				}
+			}
+
+			db_query(
+				"UPDATE ttrss_feeds SET last_error = '$error_msg',
+				last_updated = NOW() WHERE id = '$feed'");
+
+			unset($rss);
+			return;
+		}
+
+		_debug("done", $debug_enabled);
+
+		return true;
+	}
+
+	static function cache_enclosures($enclosures, $site_url, $debug) {
+		foreach ($enclosures as $enc) {
+
+			if (preg_match("/(image|audio|video)/", $enc[1])) {
+
+				$src = rewrite_relative_url($site_url, $enc[0]);
+
+				$local_filename = CACHE_DIR . "/images/" . sha1($src);
+
+				if ($debug) _debug("cache_enclosures: downloading: $src to $local_filename");
+
+				if (!file_exists($local_filename)) {
+					$file_content = fetch_file_contents($src);
+
+					if ($file_content && strlen($file_content) > _MIN_CACHE_FILE_SIZE) {
+						file_put_contents($local_filename, $file_content);
+					}
+				} else {
+					touch($local_filename);
+				}
+			}
+		}
+	}
+
+	static function cache_media($html, $site_url, $debug) {
+		libxml_use_internal_errors(true);
+
+		$charset_hack = '<head>
+			<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
+		</head>';
+
+		$doc = new DOMDocument();
+		$doc->loadHTML($charset_hack . $html);
+		$xpath = new DOMXPath($doc);
+
+		$entries = $xpath->query('(//img[@src])|(//video/source[@src])|(//audio/source[@src])');
+
+		foreach ($entries as $entry) {
+			if ($entry->hasAttribute('src') && strpos($entry->getAttribute('src'), "data:") !== 0) {
+				$src = rewrite_relative_url($site_url, $entry->getAttribute('src'));
+
+				$local_filename = CACHE_DIR . "/images/" . sha1($src);
+
+				if ($debug) _debug("cache_media: downloading: $src to $local_filename");
+
+				if (!file_exists($local_filename)) {
+					$file_content = fetch_file_contents($src);
+
+					if ($file_content && strlen($file_content) > _MIN_CACHE_FILE_SIZE) {
+						file_put_contents($local_filename, $file_content);
+					}
+				} else {
+					touch($local_filename);
+				}
+			}
+		}
+	}
+
+	static function expire_error_log($debug) {
+		if ($debug) _debug("Removing old error log entries...");
+
+		if (DB_TYPE == "pgsql") {
+			db_query("DELETE FROM ttrss_error_log
+				WHERE created_at < NOW() - INTERVAL '7 days'");
+		} else {
+			db_query("DELETE FROM ttrss_error_log
+				WHERE created_at < DATE_SUB(NOW(), INTERVAL 7 DAY)");
+		}
+
+	}
+
+	static function expire_lock_files($debug) {
+		//if ($debug) _debug("Removing old lock files...");
+
+		$num_deleted = 0;
+
+		if (is_writable(LOCK_DIRECTORY)) {
+			$files = glob(LOCK_DIRECTORY . "/*.lock");
+
+			if ($files) {
+				foreach ($files as $file) {
+					if (!file_is_locked(basename($file)) && time() - filemtime($file) > 86400*2) {
+						unlink($file);
+						++$num_deleted;
+					}
+				}
+			}
+		}
+
+		if ($debug) _debug("Removed $num_deleted old lock files.");
+	}
+
+	static function expire_cached_files($debug) {
+		foreach (array("simplepie", "images", "export", "upload") as $dir) {
+			$cache_dir = CACHE_DIR . "/$dir";
+
+//			if ($debug) _debug("Expiring $cache_dir");
+
+			$num_deleted = 0;
+
+			if (is_writable($cache_dir)) {
+				$files = glob("$cache_dir/*");
+
+				if ($files) {
+					foreach ($files as $file) {
+						if (time() - filemtime($file) > 86400*7) {
+							unlink($file);
+
+							++$num_deleted;
+						}
+					}
+				}
+			}
+
+			if ($debug) _debug("$cache_dir: removed $num_deleted files.");
+		}
+	}
+
+	/**
+	 * Source: http://www.php.net/manual/en/function.parse-url.php#104527
+	 * Returns the url query as associative array
+	 *
+	 * @param    string    query
+	 * @return    array    params
+	 */
+	static function convertUrlQuery($query) {
+		$queryParts = explode('&', $query);
+
+		$params = array();
+
+		foreach ($queryParts as $param) {
+			$item = explode('=', $param);
+			$params[$item[0]] = $item[1];
+		}
+
+		return $params;
+	}
+
+	static function get_article_filters($filters, $title, $content, $link, $author, $tags, &$matched_rules = false) {
+		$matches = array();
+
+		foreach ($filters as $filter) {
+			$match_any_rule = $filter["match_any_rule"];
+			$inverse = $filter["inverse"];
+			$filter_match = false;
+
+			foreach ($filter["rules"] as $rule) {
+				$match = false;
+				$reg_exp = str_replace('/', '\/', $rule["reg_exp"]);
+				$rule_inverse = $rule["inverse"];
+
+				if (!$reg_exp)
+					continue;
+
+				switch ($rule["type"]) {
+					case "title":
+						$match = @preg_match("/$reg_exp/iu", $title);
+						break;
+					case "content":
+						// we don't need to deal with multiline regexps
+						$content = preg_replace("/[\r\n\t]/", "", $content);
+
+						$match = @preg_match("/$reg_exp/iu", $content);
+						break;
+					case "both":
+						// we don't need to deal with multiline regexps
+						$content = preg_replace("/[\r\n\t]/", "", $content);
+
+						$match = (@preg_match("/$reg_exp/iu", $title) || @preg_match("/$reg_exp/iu", $content));
+						break;
+					case "link":
+						$match = @preg_match("/$reg_exp/iu", $link);
+						break;
+					case "author":
+						$match = @preg_match("/$reg_exp/iu", $author);
+						break;
+					case "tag":
+						foreach ($tags as $tag) {
+							if (@preg_match("/$reg_exp/iu", $tag)) {
+								$match = true;
+								break;
+							}
+						}
+						break;
+				}
+
+				if ($rule_inverse) $match = !$match;
+
+				if ($match_any_rule) {
+					if ($match) {
+						$filter_match = true;
+						break;
+					}
+				} else {
+					$filter_match = $match;
+					if (!$match) {
+						break;
+					}
+				}
+			}
+
+			if ($inverse) $filter_match = !$filter_match;
+
+			if ($filter_match) {
+				if (is_array($matched_rules)) array_push($matched_rules, $rule);
+
+				foreach ($filter["actions"] AS $action) {
+					array_push($matches, $action);
+
+					// if Stop action encountered, perform no further processing
+					if (isset($action["type"]) && $action["type"] == "stop") return $matches;
+				}
+			}
+		}
+
+		return $matches;
+	}
+
+	static function find_article_filter($filters, $filter_name) {
+		foreach ($filters as $f) {
+			if ($f["type"] == $filter_name) {
+				return $f;
+			};
+		}
+		return false;
+	}
+
+	static function find_article_filters($filters, $filter_name) {
+		$results = array();
+
+		foreach ($filters as $f) {
+			if ($f["type"] == $filter_name) {
+				array_push($results, $f);
+			};
+		}
+		return $results;
+	}
+
+	static function calculate_article_score($filters) {
+		$score = 0;
+
+		foreach ($filters as $f) {
+			if ($f["type"] == "score") {
+				$score += $f["param"];
+			};
+		}
+		return $score;
+	}
+
+	static function labels_contains_caption($labels, $caption) {
+		foreach ($labels as $label) {
+			if ($label[1] == $caption) {
+				return true;
+			}
+		}
+
+		return false;
+	}
+
+	static function assign_article_to_label_filters($id, $filters, $owner_uid, $article_labels) {
+		foreach ($filters as $f) {
+			if ($f["type"] == "label") {
+				if (!RSSUtils::labels_contains_caption($article_labels, $f["param"])) {
+					Labels::add_article($id, $f["param"], $owner_uid);
+				}
+			}
+		}
+	}
+
+	static function make_guid_from_title($title) {
+		return preg_replace("/[ \"\',.:;]/", "-",
+			mb_strtolower(strip_tags($title), 'utf-8'));
+	}
+
+	static function cleanup_counters_cache($debug) {
+		$result = db_query("DELETE FROM ttrss_counters_cache
+			WHERE feed_id > 0 AND
+			(SELECT COUNT(id) FROM ttrss_feeds WHERE
+				id = feed_id AND
+				ttrss_counters_cache.owner_uid = ttrss_feeds.owner_uid) = 0");
+		$frows = db_affected_rows($result);
+
+		$result = db_query("DELETE FROM ttrss_cat_counters_cache
+			WHERE feed_id > 0 AND
+			(SELECT COUNT(id) FROM ttrss_feed_categories WHERE
+				id = feed_id AND
+				ttrss_cat_counters_cache.owner_uid = ttrss_feed_categories.owner_uid) = 0");
+		$crows = db_affected_rows($result);
+
+		if ($debug) _debug("Removed $frows (feeds) $crows (cats) orphaned counter cache entries.");
+	}
+
+	static function housekeeping_user($owner_uid) {
+		$tmph = new PluginHost();
+
+		load_user_plugins($owner_uid, $tmph);
+
+		$tmph->run_hooks(PluginHost::HOOK_HOUSE_KEEPING, "hook_house_keeping", "");
+	}
+
+	static function housekeeping_common($debug) {
+		RSSUtils::expire_cached_files($debug);
+		RSSUtils::expire_lock_files($debug);
+		RSSUtils::expire_error_log($debug);
+
+		$count = RSSUtils::update_feedbrowser_cache();
+		_debug("Feedbrowser updated, $count feeds processed.");
+
+		Article::purge_orphans( true);
+		RSSUtils::cleanup_counters_cache($debug);
+
+		//$rc = cleanup_tags( 14, 50000);
+		//_debug("Cleaned $rc cached tags.");
+
+		PluginHost::getInstance()->run_hooks(PluginHost::HOOK_HOUSE_KEEPING, "hook_house_keeping", "");
+	}
+
+	static function check_feed_favicon($site_url, $feed) {
+		#		print "FAVICON [$site_url]: $favicon_url\n";
+
+		$icon_file = ICONS_DIR . "/$feed.ico";
+
+		if (!file_exists($icon_file)) {
+			$favicon_url = get_favicon_url($site_url);
+
+			if ($favicon_url) {
+				// Limiting to "image" type misses those served with text/plain
+				$contents = fetch_file_contents($favicon_url); // , "image");
+
+				if ($contents) {
+					// Crude image type matching.
+					// Patterns gleaned from the file(1) source code.
+					if (preg_match('/^\x00\x00\x01\x00/', $contents)) {
+						// 0       string  \000\000\001\000        MS Windows icon resource
+						//error_log("check_feed_favicon: favicon_url=$favicon_url isa MS Windows icon resource");
+					}
+					elseif (preg_match('/^GIF8/', $contents)) {
+						// 0       string          GIF8            GIF image data
+						//error_log("check_feed_favicon: favicon_url=$favicon_url isa GIF image");
+					}
+					elseif (preg_match('/^\x89PNG\x0d\x0a\x1a\x0a/', $contents)) {
+						// 0       string          \x89PNG\x0d\x0a\x1a\x0a         PNG image data
+						//error_log("check_feed_favicon: favicon_url=$favicon_url isa PNG image");
+					}
+					elseif (preg_match('/^\xff\xd8/', $contents)) {
+						// 0       beshort         0xffd8          JPEG image data
+						//error_log("check_feed_favicon: favicon_url=$favicon_url isa JPG image");
+					}
+					else {
+						//error_log("check_feed_favicon: favicon_url=$favicon_url isa UNKNOWN type");
+						$contents = "";
+					}
+				}
+
+				if ($contents) {
+					$fp = @fopen($icon_file, "w");
+
+					if ($fp) {
+						fwrite($fp, $contents);
+						fclose($fp);
+						chmod($icon_file, 0644);
+					}
+				}
+			}
+			return $icon_file;
+		}
+	}
+
+
+
+}
\ No newline at end of file