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