include/rssfuncs.php

   1 <?php
   2         define('DAEMON_UPDATE_LOGIN_LIMIT', 30);
   3         define('DAEMON_FEED_LIMIT', 100);
   4         define('DAEMON_SLEEP_INTERVAL', 60);
   5
   6         function update_feedbrowser_cache($link) {
   7
   8                 $result = db_query($link, "SELECT feed_url, site_url, title, COUNT(id) AS subscribers
   9                         FROM ttrss_feeds WHERE (SELECT COUNT(id) = 0 FROM ttrss_feeds AS tf
  10                                 WHERE tf.feed_url = ttrss_feeds.feed_url
  11                                 AND (private IS true OR auth_login != '' OR auth_pass != '' OR feed_url LIKE '%:%@%/%'))
  12                                 GROUP BY feed_url, site_url, title ORDER BY subscribers DESC LIMIT 1000");
  13
  14                 db_query($link, "BEGIN");
  15
  16                 db_query($link, "DELETE FROM ttrss_feedbrowser_cache");
  17
  18                 $count = 0;
  19
  20                 while ($line = db_fetch_assoc($result)) {
  21                         $subscribers = db_escape_string($link, $line["subscribers"]);
  22                         $feed_url = db_escape_string($link, $line["feed_url"]);
  23                         $title = db_escape_string($link, $line["title"]);
  24                         $site_url = db_escape_string($link, $line["site_url"]);
  25
  26                         $tmp_result = db_query($link, "SELECT subscribers FROM
  27                                 ttrss_feedbrowser_cache WHERE feed_url = '$feed_url'");
  28
  29                         if (db_num_rows($tmp_result) == 0) {
  30
  31                                 db_query($link, "INSERT INTO ttrss_feedbrowser_cache
  32                                         (feed_url, site_url, title, subscribers) VALUES ('$feed_url',
  33                                                 '$site_url', '$title', '$subscribers')");
  34
  35                                 ++$count;
  36
  37                         }
  38
  39                 }
  40
  41                 db_query($link, "COMMIT");
  42
  43                 return $count;
  44
  45         }
  46
  47
  48         /**
  49          * Update a feed batch.
  50          * Used by daemons to update n feeds by run.
  51          * Only update feed needing a update, and not being processed
  52          * by another process.
  53          *
  54          * @param mixed $link Database link
  55          * @param integer $limit Maximum number of feeds in update batch. Default to DAEMON_FEED_LIMIT.
  56          * @param boolean $from_http Set to true if you call this function from http to disable cli specific code.
  57          * @param boolean $debug Set to false to disable debug output. Default to true.
  58          * @return void
  59          */
  60         function update_daemon_common($link, $limit = DAEMON_FEED_LIMIT, $from_http = false, $debug = true) {
  61                 // Process all other feeds using last_updated and interval parameters
  62
  63                 define('PREFS_NO_CACHE', true);
  64
  65                 // Test if the user has loggued in recently. If not, it does not update its feeds.
  66                 if (!SINGLE_USER_MODE && DAEMON_UPDATE_LOGIN_LIMIT > 0) {
  67                         if (DB_TYPE == "pgsql") {
  68                                 $login_thresh_qpart = "AND ttrss_users.last_login >= NOW() - INTERVAL '".DAEMON_UPDATE_LOGIN_LIMIT." days'";
  69                         } else {
  70                                 $login_thresh_qpart = "AND ttrss_users.last_login >= DATE_SUB(NOW(), INTERVAL ".DAEMON_UPDATE_LOGIN_LIMIT." DAY)";
  71                         }
  72                 } else {
  73                         $login_thresh_qpart = "";
  74                 }
  75
  76                 // Test if the feed need a update (update interval exceded).
  77                 if (DB_TYPE == "pgsql") {
  78                         $update_limit_qpart = "AND ((
  79                                         ttrss_feeds.update_interval = 0
  80                                         AND ttrss_user_prefs.value > 0
  81                                         AND ttrss_feeds.last_updated < NOW() - CAST((ttrss_user_prefs.value || ' minutes') AS INTERVAL)
  82                                 ) OR (
  83                                         ttrss_feeds.update_interval > 0
  84                                         AND ttrss_feeds.last_updated < NOW() - CAST((ttrss_feeds.update_interval || ' minutes') AS INTERVAL)
  85                                 ) OR ttrss_feeds.last_updated IS NULL
  86                                 OR last_updated = '1970-01-01 00:00:00')";
  87                 } else {
  88                         $update_limit_qpart = "AND ((
  89                                         ttrss_feeds.update_interval = 0
  90                                         AND ttrss_user_prefs.value > 0
  91                                         AND ttrss_feeds.last_updated < DATE_SUB(NOW(), INTERVAL CONVERT(ttrss_user_prefs.value, SIGNED INTEGER) MINUTE)
  92                                 ) OR (
  93                                         ttrss_feeds.update_interval > 0
  94                                         AND ttrss_feeds.last_updated < DATE_SUB(NOW(), INTERVAL ttrss_feeds.update_interval MINUTE)
  95                                 ) OR ttrss_feeds.last_updated IS NULL
  96                                 OR last_updated = '1970-01-01 00:00:00')";
  97                 }
  98
  99                 // Test if feed is currently being updated by another process.
 100                 if (DB_TYPE == "pgsql") {
 101                         $updstart_thresh_qpart = "AND (ttrss_feeds.last_update_started IS NULL OR ttrss_feeds.last_update_started < NOW() - INTERVAL '5 minutes')";
 102                 } else {
 103                         $updstart_thresh_qpart = "AND (ttrss_feeds.last_update_started IS NULL OR ttrss_feeds.last_update_started < DATE_SUB(NOW(), INTERVAL 5 MINUTE))";
 104                 }
 105
 106                 // Test if there is a limit to number of updated feeds
 107                 $query_limit = "";
 108                 if($limit) $query_limit = sprintf("LIMIT %d", $limit);
 109
 110                 $random_qpart = sql_random_function();
 111
 112                 // We search for feed needing update.
 113                 $result = db_query($link, "SELECT DISTINCT ttrss_feeds.feed_url
 114                         FROM
 115                                 ttrss_feeds, ttrss_users, ttrss_user_prefs
 116                         WHERE
 117                                 ttrss_feeds.owner_uid = ttrss_users.id
 118                                 AND ttrss_users.id = ttrss_user_prefs.owner_uid
 119                                 AND ttrss_user_prefs.pref_name = 'DEFAULT_UPDATE_INTERVAL'
 120                                 $login_thresh_qpart $update_limit_qpart
 121                                 $updstart_thresh_qpart
 122                         ORDER BY feed_url $query_limit");
 123
 124                 $user_prefs_cache = array();
 125
 126                 if($debug) _debug(sprintf("Scheduled %d feeds to update...", db_num_rows($result)));
 127
 128                 // Here is a little cache magic in order to minimize risk of double feed updates.
 129                 $feeds_to_update = array();
 130                 while ($line = db_fetch_assoc($result)) {
 131                         array_push($feeds_to_update, db_escape_string($link, $line['feed_url']));
 132                 }
 133
 134                 // We update the feed last update started date before anything else.
 135                 // There is no lag due to feed contents downloads
 136                 // It prevent an other process to update the same feed.
 137
 138                 if(count($feeds_to_update) > 0) {
 139                         $feeds_quoted = array();
 140
 141                         foreach ($feeds_to_update as $feed) {
 142                                 array_push($feeds_quoted, "'" . db_escape_string($link, $feed) . "'");
 143                         }
 144
 145                         db_query($link, sprintf("UPDATE ttrss_feeds SET last_update_started = NOW()
 146                                 WHERE feed_url IN (%s)", implode(',', $feeds_quoted)));
 147                 }
 148
 149                 expire_cached_files($debug);
 150                 expire_lock_files($debug);
 151
 152                 // For each feed, we call the feed update function.
 153                 foreach ($feeds_to_update as $feed) {
 154                         if($debug) _debug("Base feed: $feed");
 155
 156                         //update_rss_feed($link, $line["id"], true);
 157
 158                         // since we have the data cached, we can deal with other feeds with the same url
 159
 160                         $tmp_result = db_query($link, "SELECT ttrss_feeds.feed_url,ttrss_feeds.id,last_updated
 161                         FROM ttrss_feeds, ttrss_users WHERE
 162                                 ttrss_users.id = ttrss_feeds.owner_uid AND
 163                                 feed_url = '".db_escape_string($link, $feed)."' AND
 164                                 ttrss_feeds.update_interval != -1
 165                                 $login_thresh_qpart
 166                         ORDER BY feed_url $query_limit");
 167
 168                         if (db_num_rows($tmp_result) > 0) {
 169                                 while ($tline = db_fetch_assoc($tmp_result)) {
 170                                         if($debug) _debug(" => " . $tline["last_updated"] . ", " . $tline["id"]);
 171                                         update_rss_feed($link, $tline["id"], true);
 172                                 }
 173                         }
 174                 }
 175
 176                 require_once "digest.php";
 177
 178                 // Send feed digests by email if needed.
 179                 send_headlines_digests($link, $debug);
 180
 181         } // function update_daemon_common
 182
 183         // ignore_daemon is not used
 184         function update_rss_feed($link, $feed, $ignore_daemon = false, $no_cache = false,
 185                 $override_url = false) {
 186
 187                 require_once "lib/simplepie/simplepie.inc";
 188
 189                 $debug_enabled = defined('DAEMON_EXTENDED_DEBUG') || $_REQUEST['xdebug'];
 190
 191                 if ($debug_enabled) {
 192                         _debug("update_rss_feed: start");
 193                 }
 194
 195                 $result = db_query($link, "SELECT id,update_interval,auth_login,
 196                         feed_url,auth_pass,cache_images,last_updated,
 197                         mark_unread_on_update, owner_uid,
 198                         pubsub_state
 199                         FROM ttrss_feeds WHERE id = '$feed'");
 200
 201                 if (db_num_rows($result) == 0) {
 202                         if ($debug_enabled) {
 203                                 _debug("update_rss_feed: feed $feed NOT FOUND/SKIPPED");
 204                         }
 205                         return false;
 206                 }
 207
 208                 $last_updated = db_fetch_result($result, 0, "last_updated");
 209                 $owner_uid = db_fetch_result($result, 0, "owner_uid");
 210                 $mark_unread_on_update = sql_bool_to_bool(db_fetch_result($result,
 211                         0, "mark_unread_on_update"));
 212                 $pubsub_state = db_fetch_result($result, 0, "pubsub_state");
 213
 214                 db_query($link, "UPDATE ttrss_feeds SET last_update_started = NOW()
 215                         WHERE id = '$feed'");
 216
 217                 $auth_login = db_fetch_result($result, 0, "auth_login");
 218                 $auth_pass = db_fetch_result($result, 0, "auth_pass");
 219
 220                 $cache_images = sql_bool_to_bool(db_fetch_result($result, 0, "cache_images"));
 221                 $fetch_url = db_fetch_result($result, 0, "feed_url");
 222
 223                 $feed = db_escape_string($link, $feed);
 224
 225                 if ($override_url) $fetch_url = $override_url;
 226
 227                 $date_feed_processed = date('Y-m-d H:i');
 228
 229                 $cache_filename = CACHE_DIR . "/simplepie/" . sha1($fetch_url) . ".feed";
 230
 231                 // Ignore cache if new feed or manual update.
 232                 $cache_age = ($no_cache || is_null($last_updated) || $last_updated == '1970-01-01 00:00:00') ?
 233                         30 : get_feed_update_interval($link, $feed) * 60;
 234
 235                 if ($debug_enabled) {
 236                         _debug("update_rss_feed: cache filename: $cache_filename exists: " . file_exists($cache_filename));
 237                         _debug("update_rss_feed: cache age: $cache_age; no cache: $no_cache");
 238                 }
 239
 240                 $cached_feed_data_hash = false;
 241
 242                 $rss = false;
 243                 $rss_hash = false;
 244
 245                 if (file_exists($cache_filename) &&
 246                         is_readable($cache_filename) &&
 247                         !$auth_login && !$auth_pass &&
 248                         filemtime($cache_filename) > time() - $cache_age) {
 249
 250                                 if ($debug_enabled) {
 251                                         _debug("update_rss_feed: using local cache.");
 252                                 }
 253
 254                                 @$rss_data = file_get_contents($cache_filename);
 255
 256                                 if ($rss_data) {
 257                                         $rss_hash = sha1($rss_data);
 258                                         @$rss = unserialize($rss_data);
 259                                 }
 260                 }
 261
 262                 if (!$rss) {
 263
 264                         if (!$feed_data) {
 265                                 if ($debug_enabled) {
 266                                         _debug("update_rss_feed: fetching [$fetch_url]...");
 267                                 }
 268
 269                                 $feed_data = fetch_file_contents($fetch_url, false,
 270                                         $auth_login, $auth_pass, false, $no_cache ? 15 : 45);
 271
 272                                 if ($debug_enabled) {
 273                                         _debug("update_rss_feed: fetch done.");
 274                                 }
 275
 276                         }
 277
 278                         if (!$feed_data) {
 279                                 global $fetch_last_error;
 280
 281                                 if ($debug_enabled) {
 282                                         _debug("update_rss_feed: unable to fetch: $fetch_last_error");
 283                                 }
 284
 285                                 $error_escaped = db_escape_string($link, $fetch_last_error);
 286
 287                                 db_query($link,
 288                                         "UPDATE ttrss_feeds SET last_error = '$error_escaped',
 289                                                 last_updated = NOW() WHERE id = '$feed'");
 290
 291                                 return;
 292                         }
 293                 }
 294
 295                 $pluginhost = new PluginHost($link);
 296                 $pluginhost->set_debug($debug_enabled);
 297                 $user_plugins = get_pref($link, "_ENABLED_PLUGINS", $owner_uid);
 298
 299                 $pluginhost->load(PLUGINS, $pluginhost::KIND_ALL);
 300                 $pluginhost->load($user_plugins, $pluginhost::KIND_USER, $owner_uid);
 301                 $pluginhost->load_data();
 302
 303                 foreach ($pluginhost->get_hooks($pluginhost::HOOK_FEED_FETCHED) as $plugin) {
 304                         $feed_data = $plugin->hook_feed_fetched($feed_data);
 305                 }
 306
 307                 if (!$rss) {
 308                         $rss = new SimplePie();
 309                         $rss->set_sanitize_class("SanitizeDummy");
 310                         // simplepie ignores the above and creates default sanitizer anyway,
 311                         // so let's override it...
 312                         $rss->sanitize = new SanitizeDummy();
 313                         $rss->set_output_encoding('UTF-8');
 314                         $rss->set_raw_data($feed_data);
 315                         $rss->enable_cache(false);
 316
 317                         @$rss->init();
 318                 }
 319
 320 //              print_r($rss);
 321
 322                 $feed = db_escape_string($link, $feed);
 323
 324                 if (!$rss->error()) {
 325
 326                         // cache data for later
 327                         if (!$auth_pass && !$auth_login && is_writable(CACHE_DIR . "/simplepie")) {
 328                                 $rss_data = serialize($rss);
 329                                 $new_rss_hash = sha1($rss_data);
 330
 331                                 if ($new_rss_hash != $rss_hash) {
 332                                         if ($debug_enabled) {
 333                                                 _debug("update_rss_feed: saving $cache_filename");
 334                                         }
 335                                         @file_put_contents($cache_filename, serialize($rss));
 336                                 }
 337                         }
 338
 339                         // We use local pluginhost here because we need to load different per-user feed plugins
 340                         $pluginhost->run_hooks($pluginhost::HOOK_FEED_PARSED, "hook_feed_parsed", $rss);
 341
 342                         if ($debug_enabled) {
 343                                 _debug("update_rss_feed: processing feed data...");
 344                         }
 345
 346 //                      db_query($link, "BEGIN");
 347
 348                         if (DB_TYPE == "pgsql") {
 349                                 $favicon_interval_qpart = "favicon_last_checked < NOW() - INTERVAL '12 hour'";
 350                         } else {
 351                                 $favicon_interval_qpart = "favicon_last_checked < DATE_SUB(NOW(), INTERVAL 12 HOUR)";
 352                         }
 353
 354                         $result = db_query($link, "SELECT title,site_url,owner_uid,
 355                                 (favicon_last_checked IS NULL OR $favicon_interval_qpart) AS
 356                                                 favicon_needs_check
 357                                 FROM ttrss_feeds WHERE id = '$feed'");
 358
 359                         $registered_title = db_fetch_result($result, 0, "title");
 360                         $orig_site_url = db_fetch_result($result, 0, "site_url");
 361                         $favicon_needs_check = sql_bool_to_bool(db_fetch_result($result, 0,
 362                                 "favicon_needs_check"));
 363
 364                         $owner_uid = db_fetch_result($result, 0, "owner_uid");
 365
 366                         $site_url = db_escape_string($link, mb_substr(rewrite_relative_url($fetch_url, $rss->get_link()), 0, 245));
 367
 368                         if ($debug_enabled) {
 369                                 _debug("update_rss_feed: checking favicon...");
 370                         }
 371
 372                         if ($favicon_needs_check) {
 373                                 check_feed_favicon($site_url, $feed, $link);
 374
 375                                 db_query($link, "UPDATE ttrss_feeds SET favicon_last_checked = NOW()
 376                                         WHERE id = '$feed'");
 377                         }
 378
 379                         if (!$registered_title || $registered_title == "[Unknown]") {
 380
 381                                 $feed_title = db_escape_string($link, $rss->get_title());
 382
 383                                 if ($debug_enabled) {
 384                                         _debug("update_rss_feed: registering title: $feed_title");
 385                                 }
 386
 387                                 db_query($link, "UPDATE ttrss_feeds SET
 388                                         title = '$feed_title' WHERE id = '$feed'");
 389                         }
 390
 391                         if ($site_url && $orig_site_url != $site_url) {
 392                                 db_query($link, "UPDATE ttrss_feeds SET
 393                                         site_url = '$site_url' WHERE id = '$feed'");
 394                         }
 395
 396                         if ($debug_enabled) {
 397                                 _debug("update_rss_feed: loading filters & labels...");
 398                         }
 399
 400                         $filters = load_filters($link, $feed, $owner_uid);
 401                         $labels = get_all_labels($link, $owner_uid);
 402
 403                         if ($debug_enabled) {
 404                                 //print_r($filters);
 405                                 _debug("update_rss_feed: " . count($filters) . " filters loaded.");
 406                         }
 407
 408                         $items = $rss->get_items();
 409
 410                         if (!is_array($items)) {
 411                                 if ($debug_enabled) {
 412                                         _debug("update_rss_feed: no articles found.");
 413                                 }
 414
 415                                 db_query($link, "UPDATE ttrss_feeds
 416                                         SET last_updated = NOW(), last_error = '' WHERE id = '$feed'");
 417
 418                                 return; // no articles
 419                         }
 420
 421                         if ($pubsub_state != 2 && PUBSUBHUBBUB_ENABLED) {
 422
 423                                 if ($debug_enabled) _debug("update_rss_feed: checking for PUSH hub...");
 424
 425                                 $feed_hub_url = false;
 426
 427                                 $links = $rss->get_links('hub');
 428
 429                                 if ($links && is_array($links)) {
 430                                         foreach ($links as $l) {
 431                                                 $feed_hub_url = $l;
 432                                                 break;
 433                                         }
 434                                 }
 435
 436                                 if ($debug_enabled) _debug("update_rss_feed: feed hub url: $feed_hub_url");
 437
 438                                 if ($feed_hub_url && function_exists('curl_init') &&
 439                                         !ini_get("open_basedir")) {
 440
 441                                         require_once 'lib/pubsubhubbub/subscriber.php';
 442
 443                                         $callback_url = get_self_url_prefix() .
 444                                                 "/public.php?op=pubsub&id=$feed";
 445
 446                                         $s = new Subscriber($feed_hub_url, $callback_url);
 447
 448                                         $rc = $s->subscribe($fetch_url);
 449
 450                                         if ($debug_enabled)
 451                                                 _debug("update_rss_feed: feed hub url found, subscribe request sent.");
 452
 453                                         db_query($link, "UPDATE ttrss_feeds SET pubsub_state = 1
 454                                                 WHERE id = '$feed'");
 455                                 }
 456                         }
 457
 458                         if ($debug_enabled) {
 459                                 _debug("update_rss_feed: processing articles...");
 460                         }
 461
 462                         foreach ($items as $item) {
 463                                 if ($_REQUEST['xdebug'] == 3) {
 464                                         print_r($item);
 465                                 }
 466
 467                                 $entry_guid = $item->get_id();
 468                                 if (!$entry_guid) $entry_guid = $item->get_link();
 469                                 if (!$entry_guid) $entry_guid = make_guid_from_title($item->get_title());
 470
 471                                 if ($debug_enabled) {
 472                                         _debug("update_rss_feed: guid $entry_guid");
 473                                 }
 474
 475                                 if (!$entry_guid) continue;
 476
 477                                 $entry_guid = "$owner_uid,$entry_guid";
 478
 479                                 $entry_timestamp = "";
 480
 481                                 $entry_timestamp = strtotime($item->get_date());
 482
 483                                 if ($entry_timestamp == -1 || !$entry_timestamp || $entry_timestamp > time()) {
 484                                         $entry_timestamp = time();
 485                                         $no_orig_date = 'true';
 486                                 } else {
 487                                         $no_orig_date = 'false';
 488                                 }
 489
 490                                 $entry_timestamp_fmt = strftime("%Y/%m/%d %H:%M:%S", $entry_timestamp);
 491
 492                                 if ($debug_enabled) {
 493                                         _debug("update_rss_feed: date $entry_timestamp [$entry_timestamp_fmt]");
 494                                 }
 495
 496                                 $entry_title = $item->get_title();
 497
 498                                 $entry_link = rewrite_relative_url($site_url, $item->get_link());
 499
 500                                 if ($debug_enabled) {
 501                                         _debug("update_rss_feed: title $entry_title");
 502                                         _debug("update_rss_feed: link $entry_link");
 503                                 }
 504
 505                                 if (!$entry_title) $entry_title = date("Y-m-d H:i:s", $entry_timestamp);;
 506
 507                                 $entry_content = $item->get_content();
 508                                 if (!$entry_content) $entry_content = $item->get_description();
 509
 510                                 if ($_REQUEST["xdebug"] == 2) {
 511                                         print "update_rss_feed: content: ";
 512                                         print $entry_content;
 513                                         print "\n";
 514                                 }
 515
 516                                 $entry_comments = $item->data["comments"];
 517
 518                                 if ($item->get_author()) {
 519                                         $entry_author_item = $item->get_author();
 520                                         $entry_author = $entry_author_item->get_name();
 521                                         if (!$entry_author) $entry_author = $entry_author_item->get_email();
 522
 523                                         $entry_author = db_escape_string($link, $entry_author);
 524                                 }
 525
 526                                 $entry_guid = db_escape_string($link, mb_substr($entry_guid, 0, 245));
 527
 528                                 $entry_comments = db_escape_string($link, mb_substr($entry_comments, 0, 245));
 529                                 $entry_author = db_escape_string($link, mb_substr($entry_author, 0, 245));
 530
 531                                 $num_comments = $item->get_item_tags('http://purl.org/rss/1.0/modules/slash/', 'comments');
 532
 533                                 if (is_array($num_comments) && is_array($num_comments[0])) {
 534                                         $num_comments = (int) $num_comments[0]["data"];
 535                                 } else {
 536                                         $num_comments = 0;
 537                                 }
 538
 539                                 if ($debug_enabled) {
 540                                         _debug("update_rss_feed: num_comments: $num_comments");
 541                                         _debug("update_rss_feed: looking for tags [1]...");
 542                                 }
 543
 544                                 // parse <category> entries into tags
 545
 546                                 $additional_tags = array();
 547
 548                                 $additional_tags_src = $item->get_categories();
 549
 550                                 if (is_array($additional_tags_src)) {
 551                                         foreach ($additional_tags_src as $tobj) {
 552                                                 array_push($additional_tags, $tobj->get_term());
 553                                         }
 554                                 }
 555
 556                                 if ($debug_enabled) {
 557                                         _debug("update_rss_feed: category tags:");
 558                                         print_r($additional_tags);
 559                                 }
 560
 561                                 if ($debug_enabled) {
 562                                         _debug("update_rss_feed: looking for tags [2]...");
 563                                 }
 564
 565                                 $entry_tags = array_unique($additional_tags);
 566
 567                                 for ($i = 0; $i < count($entry_tags); $i++)
 568                                         $entry_tags[$i] = mb_strtolower($entry_tags[$i], 'utf-8');
 569
 570                                 if ($debug_enabled) {
 571                                         //_debug("update_rss_feed: unfiltered tags found:");
 572                                         //print_r($entry_tags);
 573                                 }
 574
 575                                 if ($debug_enabled) {
 576                                         _debug("update_rss_feed: done collecting data.");
 577                                 }
 578
 579                                 // TODO: less memory-hungry implementation
 580
 581                                 if ($debug_enabled) {
 582                                         _debug("update_rss_feed: applying plugin filters..");
 583                                 }
 584
 585                                 // FIXME not sure if owner_uid is a good idea here, we may have a base entry without user entry (?)
 586                                 $result = db_query($link, "SELECT plugin_data,title,content,link,tag_cache,author FROM ttrss_entries, ttrss_user_entries
 587                                         WHERE ref_id = id AND guid = '".db_escape_string($link, $entry_guid)."' AND owner_uid = $owner_uid");
 588
 589                                 if (db_num_rows($result) != 0) {
 590                                         $entry_plugin_data = db_fetch_result($result, 0, "plugin_data");
 591                                         $stored_article = array("title" => db_fetch_result($result, 0, "title"),
 592                                                 "content" => db_fetch_result($result, 0, "content"),
 593                                                 "link" => db_fetch_result($result, 0, "link"),
 594                                                 "tags" => explode(",", db_fetch_result($result, 0, "tag_cache")),
 595                                                 "author" => db_fetch_result($result, 0, "author"));
 596                                 } else {
 597                                         $entry_plugin_data = "";
 598                                         $stored_article = array();
 599                                 }
 600
 601                                 $article = array("owner_uid" => $owner_uid, // read only
 602                                         "guid" => $entry_guid, // read only
 603                                         "title" => $entry_title,
 604                                         "content" => $entry_content,
 605                                         "link" => $entry_link,
 606                                         "tags" => $entry_tags,
 607                                         "plugin_data" => $entry_plugin_data,
 608                                         "author" => $entry_author,
 609                                         "stored" => $stored_article);
 610
 611                                 foreach ($pluginhost->get_hooks($pluginhost::HOOK_ARTICLE_FILTER) as $plugin) {
 612                                         $article = $plugin->hook_article_filter($article);
 613                                 }
 614
 615                                 $entry_tags = $article["tags"];
 616                                 $entry_guid = db_escape_string($link, $entry_guid);
 617                                 $entry_title = db_escape_string($link, $article["title"]);
 618                                 $entry_author = db_escape_string($link, $article["author"]);
 619                                 $entry_link = db_escape_string($link, $article["link"]);
 620                                 $entry_plugin_data = db_escape_string($link, $article["plugin_data"]);
 621                                 $entry_content = $article["content"]; // escaped below
 622
 623
 624                                 if ($debug_enabled) {
 625                                         _debug("update_rss_feed: plugin data: $entry_plugin_data");
 626                                 }
 627
 628                                 if ($cache_images && is_writable(CACHE_DIR . '/images'))
 629                                         cache_images($entry_content, $site_url, $debug_enabled);
 630
 631                                 $entry_content = db_escape_string($link, $entry_content, false);
 632
 633                                 $content_hash = "SHA1:" . sha1($entry_content);
 634
 635                                 db_query($link, "BEGIN");
 636
 637                                 $result = db_query($link, "SELECT id FROM       ttrss_entries
 638                                         WHERE guid = '$entry_guid'");
 639
 640                                 if (db_num_rows($result) == 0) {
 641
 642                                         if ($debug_enabled) {
 643                                                 _debug("update_rss_feed: base guid [$entry_guid] not found");
 644                                         }
 645
 646                                         // base post entry does not exist, create it
 647
 648                                         $result = db_query($link,
 649                                                 "INSERT INTO ttrss_entries
 650                                                         (title,
 651                                                         guid,
 652                                                         link,
 653                                                         updated,
 654                                                         content,
 655                                                         content_hash,
 656                                                         cached_content,
 657                                                         no_orig_date,
 658                                                         date_updated,
 659                                                         date_entered,
 660                                                         comments,
 661                                                         num_comments,
 662                                                         plugin_data,
 663                                                         author)
 664                                                 VALUES
 665                                                         ('$entry_title',
 666                                                         '$entry_guid',
 667                                                         '$entry_link',
 668                                                         '$entry_timestamp_fmt',
 669                                                         '$entry_content',
 670                                                         '$content_hash',
 671                                                         '',
 672                                                         $no_orig_date,
 673                                                         NOW(),
 674                                                         '$date_feed_processed',
 675                                                         '$entry_comments',
 676                                                         '$num_comments',
 677                                                         '$entry_plugin_data',
 678                                                         '$entry_author')");
 679
 680                                         $article_labels = array();
 681
 682                                 } else {
 683                                         // we keep encountering the entry in feeds, so we need to
 684                                         // update date_updated column so that we don't get horrible
 685                                         // dupes when the entry gets purged and reinserted again e.g.
 686                                         // in the case of SLOW SLOW OMG SLOW updating feeds
 687
 688                                         $base_entry_id = db_fetch_result($result, 0, "id");
 689
 690                                         db_query($link, "UPDATE ttrss_entries SET date_updated = NOW()
 691                                                 WHERE id = '$base_entry_id'");
 692
 693                                         $article_labels = get_article_labels($link, $base_entry_id, $owner_uid);
 694                                 }
 695
 696                                 // now it should exist, if not - bad luck then
 697
 698                                 $result = db_query($link, "SELECT
 699                                                 id,content_hash,no_orig_date,title,plugin_data,
 700                                                 ".SUBSTRING_FOR_DATE."(date_updated,1,19) as date_updated,
 701                                                 ".SUBSTRING_FOR_DATE."(updated,1,19) as updated,
 702                                                 num_comments
 703                                         FROM
 704                                                 ttrss_entries
 705                                         WHERE guid = '$entry_guid'");
 706
 707                                 $entry_ref_id = 0;
 708                                 $entry_int_id = 0;
 709
 710                                 if (db_num_rows($result) == 1) {
 711
 712                                         if ($debug_enabled) {
 713                                                 _debug("update_rss_feed: base guid [$entry_guid] found, checking for user record");
 714                                         }
 715
 716                                         // this will be used below in update handler
 717                                         $orig_content_hash = db_fetch_result($result, 0, "content_hash");
 718                                         $orig_title = db_fetch_result($result, 0, "title");
 719                                         $orig_num_comments = db_fetch_result($result, 0, "num_comments");
 720                                         $orig_date_updated = strtotime(db_fetch_result($result,
 721                                                 0, "date_updated"));
 722                                         $orig_plugin_data = db_fetch_result($result, 0, "plugin_data");
 723
 724                                         $ref_id = db_fetch_result($result, 0, "id");
 725                                         $entry_ref_id = $ref_id;
 726
 727                                         // check for user post link to main table
 728
 729                                         // do we allow duplicate posts with same GUID in different feeds?
 730                                         if (get_pref($link, "ALLOW_DUPLICATE_POSTS", $owner_uid, false)) {
 731                                                 $dupcheck_qpart = "AND (feed_id = '$feed' OR feed_id IS NULL)";
 732                                         } else {
 733                                                 $dupcheck_qpart = "";
 734                                         }
 735
 736                                         /* Collect article tags here so we could filter by them: */
 737
 738                                         $article_filters = get_article_filters($filters, $entry_title,
 739                                                 $entry_content, $entry_link, $entry_timestamp, $entry_author,
 740                                                 $entry_tags);
 741
 742                                         if ($debug_enabled) {
 743                                                 _debug("update_rss_feed: article filters: ");
 744                                                 if (count($article_filters) != 0) {
 745                                                         print_r($article_filters);
 746                                                 }
 747                                         }
 748
 749                                         if (find_article_filter($article_filters, "filter")) {
 750                                                 db_query($link, "COMMIT"); // close transaction in progress
 751                                                 continue;
 752                                         }
 753
 754                                         $score = calculate_article_score($article_filters);
 755
 756                                         if ($debug_enabled) {
 757                                                 _debug("update_rss_feed: initial score: $score");
 758                                         }
 759
 760                                         $query = "SELECT ref_id, int_id FROM ttrss_user_entries WHERE
 761                                                         ref_id = '$ref_id' AND owner_uid = '$owner_uid'
 762                                                         $dupcheck_qpart";
 763
 764 //                                      if ($_REQUEST["xdebug"]) print "$query\n";
 765
 766                                         $result = db_query($link, $query);
 767
 768                                         // okay it doesn't exist - create user entry
 769                                         if (db_num_rows($result) == 0) {
 770
 771                                                 if ($debug_enabled) {
 772                                                         _debug("update_rss_feed: user record not found, creating...");
 773                                                 }
 774
 775                                                 if ($score >= -500 && !find_article_filter($article_filters, 'catchup')) {
 776                                                         $unread = 'true';
 777                                                         $last_read_qpart = 'NULL';
 778                                                 } else {
 779                                                         $unread = 'false';
 780                                                         $last_read_qpart = 'NOW()';
 781                                                 }
 782
 783                                                 if (find_article_filter($article_filters, 'mark') || $score > 1000) {
 784                                                         $marked = 'true';
 785                                                 } else {
 786                                                         $marked = 'false';
 787                                                 }
 788
 789                                                 if (find_article_filter($article_filters, 'publish')) {
 790                                                         $published = 'true';
 791                                                 } else {
 792                                                         $published = 'false';
 793                                                 }
 794
 795                                                 // N-grams
 796
 797                                                 if (DB_TYPE == "pgsql" and defined('_NGRAM_TITLE_DUPLICATE_THRESHOLD')) {
 798
 799                                                         $result = db_query($link, "SELECT COUNT(*) AS similar FROM
 800                                                                         ttrss_entries,ttrss_user_entries
 801                                                                 WHERE ref_id = id AND updated >= NOW() - INTERVAL '7 day'
 802                                                                         AND similarity(title, '$entry_title') >= "._NGRAM_TITLE_DUPLICATE_THRESHOLD."
 803                                                                         AND owner_uid = $owner_uid");
 804
 805                                                         $ngram_similar = db_fetch_result($result, 0, "similar");
 806
 807                                                         if ($debug_enabled) {
 808                                                                 _debug("update_rss_feed: N-gram similar results: $ngram_similar");
 809                                                         }
 810
 811                                                         if ($ngram_similar > 0) {
 812                                                                 $unread = 'false';
 813                                                         }
 814                                                 }
 815
 816                                                 $last_marked = ($marked == 'true') ? 'NOW()' : 'NULL';
 817                                                 $last_published = ($published == 'true') ? 'NOW()' : 'NULL';
 818
 819                                                 $result = db_query($link,
 820                                                         "INSERT INTO ttrss_user_entries
 821                                                                 (ref_id, owner_uid, feed_id, unread, last_read, marked,
 822                                                                 published, score, tag_cache, label_cache, uuid,
 823                                                                 last_marked, last_published)
 824                                                         VALUES ('$ref_id', '$owner_uid', '$feed', $unread,
 825                                                                 $last_read_qpart, $marked, $published, '$score', '', '',
 826                                                                 '', $last_marked, $last_published)");
 827
 828                                                 if (PUBSUBHUBBUB_HUB && $published == 'true') {
 829                                                         $rss_link = get_self_url_prefix() .
 830                                                                 "/public.php?op=rss&id=-2&key=" .
 831                                                                 get_feed_access_key($link, -2, false, $owner_uid);
 832
 833                                                         $p = new Publisher(PUBSUBHUBBUB_HUB);
 834
 835                                                         $pubsub_result = $p->publish_update($rss_link);
 836                                                 }
 837
 838                                                 $result = db_query($link,
 839                                                         "SELECT int_id FROM ttrss_user_entries WHERE
 840                                                                 ref_id = '$ref_id' AND owner_uid = '$owner_uid' AND
 841                                                                 feed_id = '$feed' LIMIT 1");
 842
 843                                                 if (db_num_rows($result) == 1) {
 844                                                         $entry_int_id = db_fetch_result($result, 0, "int_id");
 845                                                 }
 846                                         } else {
 847                                                 if ($debug_enabled) {
 848                                                         _debug("update_rss_feed: user record FOUND");
 849                                                 }
 850
 851                                                 $entry_ref_id = db_fetch_result($result, 0, "ref_id");
 852                                                 $entry_int_id = db_fetch_result($result, 0, "int_id");
 853                                         }
 854
 855                                         if ($debug_enabled) {
 856                                                 _debug("update_rss_feed: RID: $entry_ref_id, IID: $entry_int_id");
 857                                         }
 858
 859                                         $post_needs_update = false;
 860                                         $update_insignificant = false;
 861
 862                                         if ($orig_num_comments != $num_comments) {
 863                                                 $post_needs_update = true;
 864                                                 $update_insignificant = true;
 865                                         }
 866
 867                                         if ($entry_plugin_data != $orig_plugin_data) {
 868                                                 $post_needs_update = true;
 869                                                 $update_insignificant = true;
 870                                         }
 871
 872                                         if ($content_hash != $orig_content_hash) {
 873                                                 $post_needs_update = true;
 874                                                 $update_insignificant = false;
 875                                         }
 876
 877                                         if (db_escape_string($link, $orig_title) != $entry_title) {
 878                                                 $post_needs_update = true;
 879                                                 $update_insignificant = false;
 880                                         }
 881
 882                                         // if post needs update, update it and mark all user entries
 883                                         // linking to this post as updated
 884                                         if ($post_needs_update) {
 885
 886                                                 if (defined('DAEMON_EXTENDED_DEBUG')) {
 887                                                         _debug("update_rss_feed: post $entry_guid needs update...");
 888                                                 }
 889
 890 //                                              print "<!-- post $orig_title needs update : $post_needs_update -->";
 891
 892                                                 db_query($link, "UPDATE ttrss_entries
 893                                                         SET title = '$entry_title', content = '$entry_content',
 894                                                                 content_hash = '$content_hash',
 895                                                                 updated = '$entry_timestamp_fmt',
 896                                                                 num_comments = '$num_comments',
 897                                                                 plugin_data = '$entry_plugin_data'
 898                                                         WHERE id = '$ref_id'");
 899
 900                                                 if (!$update_insignificant) {
 901                                                         if ($mark_unread_on_update) {
 902                                                                 db_query($link, "UPDATE ttrss_user_entries
 903                                                                         SET last_read = null, unread = true WHERE ref_id = '$ref_id'");
 904                                                         }
 905                                                 }
 906                                         }
 907                                 }
 908
 909                                 db_query($link, "COMMIT");
 910
 911                                 if ($debug_enabled) {
 912                                         _debug("update_rss_feed: assigning labels...");
 913                                 }
 914
 915                                 assign_article_to_label_filters($link, $entry_ref_id, $article_filters,
 916                                         $owner_uid, $article_labels);
 917
 918                                 if ($debug_enabled) {
 919                                         _debug("update_rss_feed: looking for enclosures...");
 920                                 }
 921
 922                                 // enclosures
 923
 924                                 $enclosures = array();
 925
 926                                 $encs = $item->get_enclosures();
 927
 928                                 if (is_array($encs)) {
 929                                         foreach ($encs as $e) {
 930                                                 $e_item = array(
 931                                                         $e->link, $e->type, $e->length);
 932                                                 array_push($enclosures, $e_item);
 933                                         }
 934                                 }
 935
 936                                 if ($debug_enabled) {
 937                                         _debug("update_rss_feed: article enclosures:");
 938                                         print_r($enclosures);
 939                                 }
 940
 941                                 db_query($link, "BEGIN");
 942
 943                                 foreach ($enclosures as $enc) {
 944                                         $enc_url = db_escape_string($link, $enc[0]);
 945                                         $enc_type = db_escape_string($link, $enc[1]);
 946                                         $enc_dur = db_escape_string($link, $enc[2]);
 947
 948                                         $result = db_query($link, "SELECT id FROM ttrss_enclosures
 949                                                 WHERE content_url = '$enc_url' AND post_id = '$entry_ref_id'");
 950
 951                                         if (db_num_rows($result) == 0) {
 952                                                 db_query($link, "INSERT INTO ttrss_enclosures
 953                                                         (content_url, content_type, title, duration, post_id) VALUES
 954                                                         ('$enc_url', '$enc_type', '', '$enc_dur', '$entry_ref_id')");
 955                                         }
 956                                 }
 957
 958                                 db_query($link, "COMMIT");
 959
 960                                 // check for manual tags (we have to do it here since they're loaded from filters)
 961
 962                                 foreach ($article_filters as $f) {
 963                                         if ($f["type"] == "tag") {
 964
 965                                                 $manual_tags = trim_array(explode(",", $f["param"]));
 966
 967                                                 foreach ($manual_tags as $tag) {
 968                                                         if (tag_is_valid($tag)) {
 969                                                                 array_push($entry_tags, $tag);
 970                                                         }
 971                                                 }
 972                                         }
 973                                 }
 974
 975                                 // Skip boring tags
 976
 977                                 $boring_tags = trim_array(explode(",", mb_strtolower(get_pref($link,
 978                                         'BLACKLISTED_TAGS', $owner_uid, ''), 'utf-8')));
 979
 980                                 $filtered_tags = array();
 981                                 $tags_to_cache = array();
 982
 983                                 if ($entry_tags && is_array($entry_tags)) {
 984                                         foreach ($entry_tags as $tag) {
 985                                                 if (array_search($tag, $boring_tags) === false) {
 986                                                         array_push($filtered_tags, $tag);
 987                                                 }
 988                                         }
 989                                 }
 990
 991                                 $filtered_tags = array_unique($filtered_tags);
 992
 993                                 if ($debug_enabled) {
 994                                         _debug("update_rss_feed: filtered article tags:");
 995                                         print_r($filtered_tags);
 996                                 }
 997
 998                                 // Save article tags in the database
 999
1000                                 if (count($filtered_tags) > 0) {
1001
1002                                         db_query($link, "BEGIN");
1003
1004                                         foreach ($filtered_tags as $tag) {
1005
1006                                                 $tag = sanitize_tag($tag);
1007                                                 $tag = db_escape_string($link, $tag);
1008
1009                                                 if (!tag_is_valid($tag)) continue;
1010
1011                                                 $result = db_query($link, "SELECT id FROM ttrss_tags
1012                                                         WHERE tag_name = '$tag' AND post_int_id = '$entry_int_id' AND
1013                                                         owner_uid = '$owner_uid' LIMIT 1");
1014
1015                                                         if ($result && db_num_rows($result) == 0) {
1016
1017                                                                 db_query($link, "INSERT INTO ttrss_tags
1018                                                                         (owner_uid,tag_name,post_int_id)
1019                                                                         VALUES ('$owner_uid','$tag', '$entry_int_id')");
1020                                                         }
1021
1022                                                 array_push($tags_to_cache, $tag);
1023                                         }
1024
1025                                         /* update the cache */
1026
1027                                         $tags_to_cache = array_unique($tags_to_cache);
1028
1029                                         $tags_str = db_escape_string($link, join(",", $tags_to_cache));
1030
1031                                         db_query($link, "UPDATE ttrss_user_entries
1032                                                 SET tag_cache = '$tags_str' WHERE ref_id = '$entry_ref_id'
1033                                                 AND owner_uid = $owner_uid");
1034
1035                                         db_query($link, "COMMIT");
1036                                 }
1037
1038                                 if (get_pref($link, "AUTO_ASSIGN_LABELS", $owner_uid, false)) {
1039                                         if ($debug_enabled) {
1040                                                 _debug("update_rss_feed: auto-assigning labels...");
1041                                         }
1042
1043                                         foreach ($labels as $label) {
1044                                                 $caption = preg_quote($label["caption"]);
1045
1046                                                 if ($caption && preg_match("/\b$caption\b/i", "$tags_str " . strip_tags($entry_content) . " $entry_title")) {
1047                                                         if (!labels_contains_caption($article_labels, $caption)) {
1048                                                                 label_add_article($link, $entry_ref_id, $caption, $owner_uid);
1049                                                         }
1050                                                 }
1051                                         }
1052                                 }
1053
1054                                 if ($debug_enabled) {
1055                                         _debug("update_rss_feed: article processed");
1056                                 }
1057                         }
1058
1059                         if (!$last_updated) {
1060                                 if ($debug_enabled) {
1061                                         _debug("update_rss_feed: new feed, catching it up...");
1062                                 }
1063                                 catchup_feed($link, $feed, false, $owner_uid);
1064                         }
1065
1066                         if ($debug_enabled) {
1067                                 _debug("purging feed...");
1068                         }
1069
1070                         purge_feed($link, $feed, 0, $debug_enabled);
1071
1072                         db_query($link, "UPDATE ttrss_feeds
1073                                 SET last_updated = NOW(), last_error = '' WHERE id = '$feed'");
1074
1075 //                      db_query($link, "COMMIT");
1076
1077                 } else {
1078
1079                         $error_msg = db_escape_string($link, mb_substr($rss->error(), 0, 245));
1080
1081                         if ($debug_enabled) {
1082                                 _debug("update_rss_feed: error fetching feed: $error_msg");
1083                         }
1084
1085                         db_query($link,
1086                                 "UPDATE ttrss_feeds SET last_error = '$error_msg',
1087                                         last_updated = NOW() WHERE id = '$feed'");
1088                 }
1089
1090                 unset($rss);
1091
1092                 if ($debug_enabled) {
1093                         _debug("update_rss_feed: done");
1094                 }
1095
1096         }
1097
1098         function cache_images($html, $site_url, $debug) {
1099                 $cache_dir = CACHE_DIR . "/images";
1100
1101                 libxml_use_internal_errors(true);
1102
1103                 $charset_hack = '<head>
1104                         <meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
1105                 </head>';
1106
1107                 $doc = new DOMDocument();
1108                 $doc->loadHTML($charset_hack . $html);
1109                 $xpath = new DOMXPath($doc);
1110
1111                 $entries = $xpath->query('(//img[@src])');
1112
1113                 foreach ($entries as $entry) {
1114                         if ($entry->hasAttribute('src')) {
1115                                 $src = rewrite_relative_url($site_url, $entry->getAttribute('src'));
1116
1117                                 $local_filename = CACHE_DIR . "/images/" . sha1($src) . ".png";
1118
1119                                 if ($debug) _debug("cache_images: downloading: $src to $local_filename");
1120
1121                                 if (!file_exists($local_filename)) {
1122                                         $file_content = fetch_file_contents($src);
1123
1124                                         if ($file_content && strlen($file_content) > 1024) {
1125                                                 file_put_contents($local_filename, $file_content);
1126                                         }
1127                                 }
1128
1129                                 if (file_exists($local_filename)) {
1130                                         $entry->setAttribute('src', SELF_URL_PATH . '/image.php?url=' .
1131                                                 base64_encode($src));
1132                                 }
1133                         }
1134                 }
1135
1136                 $node = $doc->getElementsByTagName('body')->item(0);
1137
1138                 return $doc->saveXML($node);
1139         }
1140
1141         function expire_lock_files($debug) {
1142                 if ($debug) _debug("Removing old lock files...");
1143
1144                 $num_deleted = 0;
1145
1146                 if (is_writable(LOCK_DIRECTORY)) {
1147                         $files = glob(LOCK_DIRECTORY . "/*.lock");
1148
1149                         if ($files) {
1150                                 foreach ($files as $file) {
1151                                         if (!file_is_locked($file) && time() - filemtime($file) > 86400*2) {
1152                                                 unlink($file);
1153                                                 ++$num_deleted;
1154                                         }
1155                                 }
1156                         }
1157                 }
1158
1159                 if ($debug) _debug("Removed $num_deleted files.");
1160         }
1161
1162         function expire_cached_files($debug) {
1163                 foreach (array("simplepie", "images", "export") as $dir) {
1164                         $cache_dir = CACHE_DIR . "/$dir";
1165
1166                         if ($debug) _debug("Expiring $cache_dir");
1167
1168                         $num_deleted = 0;
1169
1170                         if (is_writable($cache_dir)) {
1171                                 $files = glob("$cache_dir/*");
1172
1173                                 if ($files) {
1174                                         foreach ($files as $file) {
1175                                                 if (time() - filemtime($file) > 86400*7) {
1176                                                         unlink($file);
1177
1178                                                         ++$num_deleted;
1179                                                 }
1180                                         }
1181                                 }
1182                         }
1183
1184                         if ($debug) _debug("Removed $num_deleted files.");
1185                 }
1186         }
1187
1188         /**
1189         * Source: http://www.php.net/manual/en/function.parse-url.php#104527
1190         * Returns the url query as associative array
1191         *
1192         * @param    string    query
1193         * @return    array    params
1194         */
1195         function convertUrlQuery($query) {
1196                 $queryParts = explode('&', $query);
1197
1198                 $params = array();
1199
1200                 foreach ($queryParts as $param) {
1201                         $item = explode('=', $param);
1202                         $params[$item[0]] = $item[1];
1203                 }
1204
1205                 return $params;
1206         }
1207
1208         function get_article_filters($filters, $title, $content, $link, $timestamp, $author, $tags) {
1209                 $matches = array();
1210
1211                 foreach ($filters as $filter) {
1212                         $match_any_rule = $filter["match_any_rule"];
1213                         $inverse = $filter["inverse"];
1214                         $filter_match = false;
1215
1216                         foreach ($filter["rules"] as $rule) {
1217                                 $match = false;
1218                                 $reg_exp = $rule["reg_exp"];
1219                                 $rule_inverse = $rule["inverse"];
1220
1221                                 if (!$reg_exp)
1222                                         continue;
1223
1224                                 switch ($rule["type"]) {
1225                                 case "title":
1226                                         $match = @preg_match("/$reg_exp/i", $title);
1227                                         break;
1228                                 case "content":
1229                                         // we don't need to deal with multiline regexps
1230                                         $content = preg_replace("/[\r\n\t]/", "", $content);
1231
1232                                         $match = @preg_match("/$reg_exp/i", $content);
1233                                         break;
1234                                 case "both":
1235                                         // we don't need to deal with multiline regexps
1236                                         $content = preg_replace("/[\r\n\t]/", "", $content);
1237
1238                                         $match = (@preg_match("/$reg_exp/i", $title) || @preg_match("/$reg_exp/i", $content));
1239                                         break;
1240                                 case "link":
1241                                         $match = @preg_match("/$reg_exp/i", $link);
1242                                         break;
1243                                 case "author":
1244                                         $match = @preg_match("/$reg_exp/i", $author);
1245                                         break;
1246                                 case "tag":
1247                                         $tag_string = join(",", $tags);
1248                                         $match = @preg_match("/$reg_exp/i", $tag_string);
1249                                         break;
1250                                 }
1251
1252                                 if ($rule_inverse) $match = !$match;
1253
1254                                 if ($match_any_rule) {
1255                                         if ($match) {
1256                                                 $filter_match = true;
1257                                                 break;
1258                                         }
1259                                 } else {
1260                                         $filter_match = $match;
1261                                         if (!$match) {
1262                                                 break;
1263                                         }
1264                                 }
1265                         }
1266
1267                         if ($inverse) $filter_match = !$filter_match;
1268
1269                         if ($filter_match) {
1270                                 foreach ($filter["actions"] AS $action) {
1271                                         array_push($matches, $action);
1272                                 }
1273                         }
1274                 }
1275
1276                 return $matches;
1277         }
1278
1279         function find_article_filter($filters, $filter_name) {
1280                 foreach ($filters as $f) {
1281                         if ($f["type"] == $filter_name) {
1282                                 return $f;
1283                         };
1284                 }
1285                 return false;
1286         }
1287
1288         function find_article_filters($filters, $filter_name) {
1289                 $results = array();
1290
1291                 foreach ($filters as $f) {
1292                         if ($f["type"] == $filter_name) {
1293                                 array_push($results, $f);
1294                         };
1295                 }
1296                 return $results;
1297         }
1298
1299         function calculate_article_score($filters) {
1300                 $score = 0;
1301
1302                 foreach ($filters as $f) {
1303                         if ($f["type"] == "score") {
1304                                 $score += $f["param"];
1305                         };
1306                 }
1307                 return $score;
1308         }
1309
1310         function labels_contains_caption($labels, $caption) {
1311                 foreach ($labels as $label) {
1312                         if ($label[1] == $caption) {
1313                                 return true;
1314                         }
1315                 }
1316
1317                 return false;
1318         }
1319
1320         function assign_article_to_label_filters($link, $id, $filters, $owner_uid, $article_labels) {
1321                 foreach ($filters as $f) {
1322                         if ($f["type"] == "label") {
1323                                 if (!labels_contains_caption($article_labels, $f["param"])) {
1324                                         label_add_article($link, $id, $f["param"], $owner_uid);
1325                                 }
1326                         }
1327                 }
1328         }
1329
1330         function make_guid_from_title($title) {
1331                 return preg_replace("/[ \"\',.:;]/", "-",
1332                         mb_strtolower(strip_tags($title), 'utf-8'));
1333         }
1334
1335
1336 ?>