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 != '-1'
  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 != '-1'
  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,$random_qpart
 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...", 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                 $nf = 0;
 153
 154                 // For each feed, we call the feed update function.
 155                 foreach ($feeds_to_update as $feed) {
 156                         if($debug) _debug("Base feed: $feed");
 157
 158                         //update_rss_feed($link, $line["id"], true);
 159
 160                         // since we have the data cached, we can deal with other feeds with the same url
 161
 162                         $tmp_result = db_query($link, "SELECT DISTINCT ttrss_feeds.id,last_updated
 163                         FROM ttrss_feeds, ttrss_users, ttrss_user_prefs WHERE
 164                                 ttrss_user_prefs.owner_uid = ttrss_feeds.owner_uid AND
 165                                 ttrss_users.id = ttrss_user_prefs.owner_uid AND
 166                                 ttrss_user_prefs.pref_name = 'DEFAULT_UPDATE_INTERVAL' AND
 167                                 feed_url = '".db_escape_string($link, $feed)."' AND
 168                                 (ttrss_feeds.update_interval > 0 OR
 169                                         ttrss_user_prefs.value != '-1')
 170                                 $login_thresh_qpart
 171                         ORDER BY ttrss_feeds.id $query_limit");
 172
 173                         if (db_num_rows($tmp_result) > 0) {
 174                                 while ($tline = db_fetch_assoc($tmp_result)) {
 175                                         if($debug) _debug(" => " . $tline["last_updated"] . ", " . $tline["id"]);
 176                                         update_rss_feed($link, $tline["id"], true);
 177                                         ++$nf;
 178                                 }
 179                         }
 180                 }
 181
 182                 require_once "digest.php";
 183
 184                 // Send feed digests by email if needed.
 185                 send_headlines_digests($link, $debug);
 186
 187                 return $nf;
 188
 189         } // function update_daemon_common
 190
 191         // ignore_daemon is not used
 192         function update_rss_feed($link, $feed, $ignore_daemon = false, $no_cache = false,
 193                 $override_url = false) {
 194
 195                 require_once "lib/simplepie/simplepie.inc";
 196
 197                 $debug_enabled = defined('DAEMON_EXTENDED_DEBUG') || $_REQUEST['xdebug'];
 198
 199                 if ($debug_enabled) {
 200                         _debug("update_rss_feed: start");
 201                 }
 202
 203                 $result = db_query($link, "SELECT id,update_interval,auth_login,
 204                         feed_url,auth_pass,cache_images,last_updated,
 205                         mark_unread_on_update, owner_uid,
 206                         pubsub_state, auth_pass_encrypted
 207                         FROM ttrss_feeds WHERE id = '$feed'");
 208
 209                 if (db_num_rows($result) == 0) {
 210                         if ($debug_enabled) {
 211                                 _debug("update_rss_feed: feed $feed NOT FOUND/SKIPPED");
 212                         }
 213                         return false;
 214                 }
 215
 216                 $last_updated = db_fetch_result($result, 0, "last_updated");
 217                 $owner_uid = db_fetch_result($result, 0, "owner_uid");
 218                 $mark_unread_on_update = sql_bool_to_bool(db_fetch_result($result,
 219                         0, "mark_unread_on_update"));
 220                 $pubsub_state = db_fetch_result($result, 0, "pubsub_state");
 221                 $auth_pass_encrypted = sql_bool_to_bool(db_fetch_result($result,
 222                         0, "auth_pass_encrypted"));
 223
 224                 db_query($link, "UPDATE ttrss_feeds SET last_update_started = NOW()
 225                         WHERE id = '$feed'");
 226
 227                 $auth_login = db_fetch_result($result, 0, "auth_login");
 228                 $auth_pass = db_fetch_result($result, 0, "auth_pass");
 229
 230                 if ($auth_pass_encrypted) {
 231                         require_once "crypt.php";
 232                         $auth_pass = decrypt_string($auth_pass);
 233                 }
 234
 235                 $cache_images = sql_bool_to_bool(db_fetch_result($result, 0, "cache_images"));
 236                 $fetch_url = db_fetch_result($result, 0, "feed_url");
 237
 238                 $feed = db_escape_string($link, $feed);
 239
 240                 if ($override_url) $fetch_url = $override_url;
 241
 242                 $date_feed_processed = date('Y-m-d H:i');
 243
 244                 $cache_filename = CACHE_DIR . "/simplepie/" . sha1($fetch_url) . ".feed";
 245
 246                 // Ignore cache if new feed or manual update.
 247                 $cache_age = ($no_cache || is_null($last_updated) || $last_updated == '1970-01-01 00:00:00') ?
 248                         30 : get_feed_update_interval($link, $feed) * 60;
 249
 250                 if ($debug_enabled) {
 251                         _debug("update_rss_feed: cache filename: $cache_filename exists: " . file_exists($cache_filename));
 252                         _debug("update_rss_feed: cache age: $cache_age; no cache: $no_cache");
 253                 }
 254
 255                 $cached_feed_data_hash = false;
 256
 257                 $rss = false;
 258                 $rss_hash = false;
 259                 $cache_timestamp = file_exists($cache_filename) ? filemtime($cache_filename) : 0;
 260                 $last_updated_timestamp = strtotime($last_updated);
 261
 262                 $force_refetch = isset($_REQUEST["force_refetch"]);
 263
 264                 if (file_exists($cache_filename) &&
 265                         is_readable($cache_filename) &&
 266                         !$auth_login && !$auth_pass &&
 267                         filemtime($cache_filename) > time() - $cache_age) {
 268
 269                                 if ($debug_enabled) {
 270                                         _debug("update_rss_feed: using local cache.");
 271                                 }
 272
 273                                 if ($cache_timestamp > $last_updated_timestamp) {
 274                                         @$rss_data = file_get_contents($cache_filename);
 275
 276                                         if ($rss_data) {
 277                                                 $rss_hash = sha1($rss_data);
 278                                                 @$rss = unserialize($rss_data);
 279                                         }
 280                                 } else if (!$force_refetch) {
 281                                         if ($debug_enabled) {
 282                                                 _debug("update_rss_feed: local cache valid and older than last_updated, nothing to do.");
 283                                         }
 284                                         return;
 285                                 }
 286                 }
 287
 288                 if (!$rss) {
 289
 290                         if (!$feed_data) {
 291                                 if ($debug_enabled) {
 292                                         _debug("update_rss_feed: fetching [$fetch_url] (ts: $cache_timestamp/$last_updated_timestamp)");
 293                                 }
 294
 295                                 $feed_data = fetch_file_contents($fetch_url, false,
 296                                         $auth_login, $auth_pass, false,
 297                                         $no_cache ? FEED_FETCH_NO_CACHE_TIMEOUT : FEED_FETCH_TIMEOUT,
 298                                         $force_refetch ? 0 : max($last_updated_timestamp, $cache_timestamp));
 299
 300                                 if ($debug_enabled) {
 301                                         _debug("update_rss_feed: fetch done.");
 302                                 }
 303
 304                         }
 305
 306                         if (!$feed_data) {
 307                                 global $fetch_last_error;
 308                                 global $fetch_last_error_code;
 309
 310                                 if ($debug_enabled) {
 311                                         _debug("update_rss_feed: unable to fetch: $fetch_last_error [$fetch_last_error_code]");
 312                                 }
 313
 314                                 $error_escaped = '';
 315
 316                                 // If-Modified-Since
 317                                 if ($fetch_last_error_code != 304) {
 318                                         $error_escaped = db_escape_string($link, $fetch_last_error);
 319                                 } else {
 320                                         if ($debug_enabled) {
 321                                                 _debug("update_rss_feed: source claims data not modified, nothing to do.");
 322                                         }
 323                                 }
 324
 325                                 db_query($link,
 326                                         "UPDATE ttrss_feeds SET last_error = '$error_escaped',
 327                                                 last_updated = NOW() WHERE id = '$feed'");
 328
 329                                 return;
 330                         }
 331                 }
 332
 333                 $pluginhost = new PluginHost($link);
 334                 $pluginhost->set_debug($debug_enabled);
 335                 $user_plugins = get_pref($link, "_ENABLED_PLUGINS", $owner_uid);
 336
 337                 $pluginhost->load(PLUGINS, $pluginhost::KIND_ALL);
 338                 $pluginhost->load($user_plugins, $pluginhost::KIND_USER, $owner_uid);
 339                 $pluginhost->load_data();
 340
 341                 foreach ($pluginhost->get_hooks($pluginhost::HOOK_FEED_FETCHED) as $plugin) {
 342                         $feed_data = $plugin->hook_feed_fetched($feed_data);
 343                 }
 344
 345                 if (!$rss) {
 346                         $rss = new SimplePie();
 347                         $rss->set_sanitize_class("SanitizeDummy");
 348                         // simplepie ignores the above and creates default sanitizer anyway,
 349                         // so let's override it...
 350                         $rss->sanitize = new SanitizeDummy();
 351                         $rss->set_output_encoding('UTF-8');
 352                         $rss->set_raw_data($feed_data);
 353                         $rss->enable_cache(false);
 354
 355                         @$rss->init();
 356                 }
 357
 358 //              print_r($rss);
 359
 360                 $feed = db_escape_string($link, $feed);
 361
 362                 if (!$rss->error()) {
 363
 364                         // cache data for later
 365                         if (!$auth_pass && !$auth_login && is_writable(CACHE_DIR . "/simplepie")) {
 366                                 $rss_data = serialize($rss);
 367                                 $new_rss_hash = sha1($rss_data);
 368
 369                                 if ($new_rss_hash != $rss_hash) {
 370                                         if ($debug_enabled) {
 371                                                 _debug("update_rss_feed: saving $cache_filename");
 372                                         }
 373                                         @file_put_contents($cache_filename, serialize($rss));
 374                                 }
 375                         }
 376
 377                         // We use local pluginhost here because we need to load different per-user feed plugins
 378                         $pluginhost->run_hooks($pluginhost::HOOK_FEED_PARSED, "hook_feed_parsed", $rss);
 379
 380                         if ($debug_enabled) {
 381                                 _debug("update_rss_feed: processing feed data...");
 382                         }
 383
 384 //                      db_query($link, "BEGIN");
 385
 386                         if (DB_TYPE == "pgsql") {
 387                                 $favicon_interval_qpart = "favicon_last_checked < NOW() - INTERVAL '12 hour'";
 388                         } else {
 389                                 $favicon_interval_qpart = "favicon_last_checked < DATE_SUB(NOW(), INTERVAL 12 HOUR)";
 390                         }
 391
 392                         $result = db_query($link, "SELECT title,site_url,owner_uid,
 393                                 (favicon_last_checked IS NULL OR $favicon_interval_qpart) AS
 394                                                 favicon_needs_check
 395                                 FROM ttrss_feeds WHERE id = '$feed'");
 396
 397                         $registered_title = db_fetch_result($result, 0, "title");
 398                         $orig_site_url = db_fetch_result($result, 0, "site_url");
 399                         $favicon_needs_check = sql_bool_to_bool(db_fetch_result($result, 0,
 400                                 "favicon_needs_check"));
 401
 402                         $owner_uid = db_fetch_result($result, 0, "owner_uid");
 403
 404                         $site_url = db_escape_string($link, mb_substr(rewrite_relative_url($fetch_url, $rss->get_link()), 0, 245));
 405
 406                         if ($favicon_needs_check || $force_refetch) {
 407                                 if ($debug_enabled) {
 408                                         _debug("update_rss_feed: checking favicon...");
 409                                 }
 410
 411                                 check_feed_favicon($site_url, $feed, $link);
 412                                 $favicon_file = ICONS_DIR . "/$feed.ico";
 413
 414                                 if (file_exists($favicon_file)) {
 415                                                  require_once "colors.php";
 416
 417                                                  $favicon_color = db_escape_string($link,
 418                                                          calculate_avg_color($favicon_file));
 419
 420                                                  if ($debug_enabled) _debug("color: $favicon_color");
 421
 422                                                  $favicon_colorstring = ",favicon_avg_color = '".$favicon_color."'";
 423                                 }
 424
 425                                 db_query($link, "UPDATE ttrss_feeds SET favicon_last_checked = NOW() $favicon_colorstring
 426                                         WHERE id = '$feed'");
 427                         }
 428
 429                         if (!$registered_title || $registered_title == "[Unknown]") {
 430
 431                                 $feed_title = db_escape_string($link, $rss->get_title());
 432
 433                                 if ($debug_enabled) {
 434                                         _debug("update_rss_feed: registering title: $feed_title");
 435                                 }
 436
 437                                 db_query($link, "UPDATE ttrss_feeds SET
 438                                         title = '$feed_title' WHERE id = '$feed'");
 439                         }
 440
 441                         if ($site_url && $orig_site_url != $site_url) {
 442                                 db_query($link, "UPDATE ttrss_feeds SET
 443                                         site_url = '$site_url' WHERE id = '$feed'");
 444                         }
 445
 446                         if ($debug_enabled) {
 447                                 _debug("update_rss_feed: loading filters & labels...");
 448                         }
 449
 450                         $filters = load_filters($link, $feed, $owner_uid);
 451                         $labels = get_all_labels($link, $owner_uid);
 452
 453                         if ($debug_enabled) {
 454                                 //print_r($filters);
 455                                 _debug("update_rss_feed: " . count($filters) . " filters loaded.");
 456                         }
 457
 458                         $items = $rss->get_items();
 459
 460                         if (!is_array($items)) {
 461                                 if ($debug_enabled) {
 462                                         _debug("update_rss_feed: no articles found.");
 463                                 }
 464
 465                                 db_query($link, "UPDATE ttrss_feeds
 466                                         SET last_updated = NOW(), last_error = '' WHERE id = '$feed'");
 467
 468                                 return; // no articles
 469                         }
 470
 471                         if ($pubsub_state != 2 && PUBSUBHUBBUB_ENABLED) {
 472
 473                                 if ($debug_enabled) _debug("update_rss_feed: checking for PUSH hub...");
 474
 475                                 $feed_hub_url = false;
 476
 477                                 $links = $rss->get_links('hub');
 478
 479                                 if ($links && is_array($links)) {
 480                                         foreach ($links as $l) {
 481                                                 $feed_hub_url = $l;
 482                                                 break;
 483                                         }
 484                                 }
 485
 486                                 if ($debug_enabled) _debug("update_rss_feed: feed hub url: $feed_hub_url");
 487
 488                                 if ($feed_hub_url && function_exists('curl_init') &&
 489                                         !ini_get("open_basedir")) {
 490
 491                                         require_once 'lib/pubsubhubbub/subscriber.php';
 492
 493                                         $callback_url = get_self_url_prefix() .
 494                                                 "/public.php?op=pubsub&id=$feed";
 495
 496                                         $s = new Subscriber($feed_hub_url, $callback_url);
 497
 498                                         $rc = $s->subscribe($fetch_url);
 499
 500                                         if ($debug_enabled)
 501                                                 _debug("update_rss_feed: feed hub url found, subscribe request sent.");
 502
 503                                         db_query($link, "UPDATE ttrss_feeds SET pubsub_state = 1
 504                                                 WHERE id = '$feed'");
 505                                 }
 506                         }
 507
 508                         if ($debug_enabled) {
 509                                 _debug("update_rss_feed: processing articles...");
 510                         }
 511
 512                         foreach ($items as $item) {
 513                                 if ($_REQUEST['xdebug'] == 3) {
 514                                         print_r($item);
 515                                 }
 516
 517                                 $entry_guid = $item->get_id();
 518                                 if (!$entry_guid) $entry_guid = $item->get_link();
 519                                 if (!$entry_guid) $entry_guid = make_guid_from_title($item->get_title());
 520
 521                                 if ($debug_enabled) {
 522                                         _debug("update_rss_feed: guid $entry_guid");
 523                                 }
 524
 525                                 if (!$entry_guid) continue;
 526
 527                                 $entry_guid = "$owner_uid,$entry_guid";
 528
 529                                 $entry_timestamp = "";
 530
 531                                 $entry_timestamp = strtotime($item->get_date());
 532
 533                                 if ($entry_timestamp == -1 || !$entry_timestamp || $entry_timestamp > time()) {
 534                                         $entry_timestamp = time();
 535                                         $no_orig_date = 'true';
 536                                 } else {
 537                                         $no_orig_date = 'false';
 538                                 }
 539
 540                                 $entry_timestamp_fmt = strftime("%Y/%m/%d %H:%M:%S", $entry_timestamp);
 541
 542                                 if ($debug_enabled) {
 543                                         _debug("update_rss_feed: date $entry_timestamp [$entry_timestamp_fmt]");
 544                                 }
 545
 546                                 $entry_title = html_entity_decode($item->get_title());
 547
 548                                 $entry_link = rewrite_relative_url($site_url, $item->get_link());
 549
 550                                 if ($debug_enabled) {
 551                                         _debug("update_rss_feed: title $entry_title");
 552                                         _debug("update_rss_feed: link $entry_link");
 553                                 }
 554
 555                                 if (!$entry_title) $entry_title = date("Y-m-d H:i:s", $entry_timestamp);;
 556
 557                                 $entry_content = $item->get_content();
 558                                 if (!$entry_content) $entry_content = $item->get_description();
 559
 560                                 if ($_REQUEST["xdebug"] == 2) {
 561                                         print "update_rss_feed: content: ";
 562                                         print $entry_content;
 563                                         print "\n";
 564                                 }
 565
 566                                 $entry_comments = $item->data["comments"];
 567
 568                                 if ($item->get_author()) {
 569                                         $entry_author_item = $item->get_author();
 570                                         $entry_author = $entry_author_item->get_name();
 571                                         if (!$entry_author) $entry_author = $entry_author_item->get_email();
 572
 573                                         $entry_author = db_escape_string($link, $entry_author);
 574                                 }
 575
 576                                 $entry_guid = db_escape_string($link, mb_substr($entry_guid, 0, 245));
 577
 578                                 $entry_comments = db_escape_string($link, mb_substr($entry_comments, 0, 245));
 579                                 $entry_author = db_escape_string($link, mb_substr($entry_author, 0, 245));
 580
 581                                 $num_comments = $item->get_item_tags('http://purl.org/rss/1.0/modules/slash/', 'comments');
 582
 583                                 if (is_array($num_comments) && is_array($num_comments[0])) {
 584                                         $num_comments = (int) $num_comments[0]["data"];
 585                                 } else {
 586                                         $num_comments = 0;
 587                                 }
 588
 589                                 if ($debug_enabled) {
 590                                         _debug("update_rss_feed: num_comments: $num_comments");
 591                                         _debug("update_rss_feed: looking for tags [1]...");
 592                                 }
 593
 594                                 // parse <category> entries into tags
 595
 596                                 $additional_tags = array();
 597
 598                                 $additional_tags_src = $item->get_categories();
 599
 600                                 if (is_array($additional_tags_src)) {
 601                                         foreach ($additional_tags_src as $tobj) {
 602                                                 array_push($additional_tags, $tobj->get_term());
 603                                         }
 604                                 }
 605
 606                                 if ($debug_enabled) {
 607                                         _debug("update_rss_feed: category tags:");
 608                                         print_r($additional_tags);
 609                                 }
 610
 611                                 if ($debug_enabled) {
 612                                         _debug("update_rss_feed: looking for tags [2]...");
 613                                 }
 614
 615                                 $entry_tags = array_unique($additional_tags);
 616
 617                                 for ($i = 0; $i < count($entry_tags); $i++)
 618                                         $entry_tags[$i] = mb_strtolower($entry_tags[$i], 'utf-8');
 619
 620                                 if ($debug_enabled) {
 621                                         //_debug("update_rss_feed: unfiltered tags found:");
 622                                         //print_r($entry_tags);
 623                                 }
 624
 625                                 if ($debug_enabled) {
 626                                         _debug("update_rss_feed: done collecting data.");
 627                                 }
 628
 629                                 // TODO: less memory-hungry implementation
 630
 631                                 if ($debug_enabled) {
 632                                         _debug("update_rss_feed: applying plugin filters..");
 633                                 }
 634
 635                                 // FIXME not sure if owner_uid is a good idea here, we may have a base entry without user entry (?)
 636                                 $result = db_query($link, "SELECT plugin_data,title,content,link,tag_cache,author FROM ttrss_entries, ttrss_user_entries
 637                                         WHERE ref_id = id AND guid = '".db_escape_string($link, $entry_guid)."' AND owner_uid = $owner_uid");
 638
 639                                 if (db_num_rows($result) != 0) {
 640                                         $entry_plugin_data = db_fetch_result($result, 0, "plugin_data");
 641                                         $stored_article = array("title" => db_fetch_result($result, 0, "title"),
 642                                                 "content" => db_fetch_result($result, 0, "content"),
 643                                                 "link" => db_fetch_result($result, 0, "link"),
 644                                                 "tags" => explode(",", db_fetch_result($result, 0, "tag_cache")),
 645                                                 "author" => db_fetch_result($result, 0, "author"));
 646                                 } else {
 647                                         $entry_plugin_data = "";
 648                                         $stored_article = array();
 649                                 }
 650
 651                                 $article = array("owner_uid" => $owner_uid, // read only
 652                                         "guid" => $entry_guid, // read only
 653                                         "title" => $entry_title,
 654                                         "content" => $entry_content,
 655                                         "link" => $entry_link,
 656                                         "tags" => $entry_tags,
 657                                         "plugin_data" => $entry_plugin_data,
 658                                         "author" => $entry_author,
 659                                         "stored" => $stored_article);
 660
 661                                 foreach ($pluginhost->get_hooks($pluginhost::HOOK_ARTICLE_FILTER) as $plugin) {
 662                                         $article = $plugin->hook_article_filter($article);
 663                                 }
 664
 665                                 $entry_tags = $article["tags"];
 666                                 $entry_guid = db_escape_string($link, $entry_guid);
 667                                 $entry_title = db_escape_string($link, $article["title"]);
 668                                 $entry_author = db_escape_string($link, $article["author"]);
 669                                 $entry_link = db_escape_string($link, $article["link"]);
 670                                 $entry_plugin_data = db_escape_string($link, $article["plugin_data"]);
 671                                 $entry_content = $article["content"]; // escaped below
 672
 673
 674                                 if ($debug_enabled) {
 675                                         _debug("update_rss_feed: plugin data: $entry_plugin_data");
 676                                 }
 677
 678                                 if ($cache_images && is_writable(CACHE_DIR . '/images'))
 679                                         cache_images($entry_content, $site_url, $debug_enabled);
 680
 681                                 $entry_content = db_escape_string($link, $entry_content, false);
 682
 683                                 $content_hash = "SHA1:" . sha1($entry_content);
 684
 685                                 db_query($link, "BEGIN");
 686
 687                                 $result = db_query($link, "SELECT id FROM       ttrss_entries
 688                                         WHERE guid = '$entry_guid'");
 689
 690                                 if (db_num_rows($result) == 0) {
 691
 692                                         if ($debug_enabled) {
 693                                                 _debug("update_rss_feed: base guid [$entry_guid] not found");
 694                                         }
 695
 696                                         // base post entry does not exist, create it
 697
 698                                         $result = db_query($link,
 699                                                 "INSERT INTO ttrss_entries
 700                                                         (title,
 701                                                         guid,
 702                                                         link,
 703                                                         updated,
 704                                                         content,
 705                                                         content_hash,
 706                                                         cached_content,
 707                                                         no_orig_date,
 708                                                         date_updated,
 709                                                         date_entered,
 710                                                         comments,
 711                                                         num_comments,
 712                                                         plugin_data,
 713                                                         author)
 714                                                 VALUES
 715                                                         ('$entry_title',
 716                                                         '$entry_guid',
 717                                                         '$entry_link',
 718                                                         '$entry_timestamp_fmt',
 719                                                         '$entry_content',
 720                                                         '$content_hash',
 721                                                         '',
 722                                                         $no_orig_date,
 723                                                         NOW(),
 724                                                         '$date_feed_processed',
 725                                                         '$entry_comments',
 726                                                         '$num_comments',
 727                                                         '$entry_plugin_data',
 728                                                         '$entry_author')");
 729
 730                                         $article_labels = array();
 731
 732                                 } else {
 733                                         // we keep encountering the entry in feeds, so we need to
 734                                         // update date_updated column so that we don't get horrible
 735                                         // dupes when the entry gets purged and reinserted again e.g.
 736                                         // in the case of SLOW SLOW OMG SLOW updating feeds
 737
 738                                         $base_entry_id = db_fetch_result($result, 0, "id");
 739
 740                                         db_query($link, "UPDATE ttrss_entries SET date_updated = NOW()
 741                                                 WHERE id = '$base_entry_id'");
 742
 743                                         $article_labels = get_article_labels($link, $base_entry_id, $owner_uid);
 744                                 }
 745
 746                                 // now it should exist, if not - bad luck then
 747
 748                                 $result = db_query($link, "SELECT
 749                                                 id,content_hash,no_orig_date,title,plugin_data,
 750                                                 ".SUBSTRING_FOR_DATE."(date_updated,1,19) as date_updated,
 751                                                 ".SUBSTRING_FOR_DATE."(updated,1,19) as updated,
 752                                                 num_comments
 753                                         FROM
 754                                                 ttrss_entries
 755                                         WHERE guid = '$entry_guid'");
 756
 757                                 $entry_ref_id = 0;
 758                                 $entry_int_id = 0;
 759
 760                                 if (db_num_rows($result) == 1) {
 761
 762                                         if ($debug_enabled) {
 763                                                 _debug("update_rss_feed: base guid [$entry_guid] found, checking for user record");
 764                                         }
 765
 766                                         // this will be used below in update handler
 767                                         $orig_content_hash = db_fetch_result($result, 0, "content_hash");
 768                                         $orig_title = db_fetch_result($result, 0, "title");
 769                                         $orig_num_comments = db_fetch_result($result, 0, "num_comments");
 770                                         $orig_date_updated = strtotime(db_fetch_result($result,
 771                                                 0, "date_updated"));
 772                                         $orig_plugin_data = db_fetch_result($result, 0, "plugin_data");
 773
 774                                         $ref_id = db_fetch_result($result, 0, "id");
 775                                         $entry_ref_id = $ref_id;
 776
 777                                         // check for user post link to main table
 778
 779                                         // do we allow duplicate posts with same GUID in different feeds?
 780                                         if (get_pref($link, "ALLOW_DUPLICATE_POSTS", $owner_uid, false)) {
 781                                                 $dupcheck_qpart = "AND (feed_id = '$feed' OR feed_id IS NULL)";
 782                                         } else {
 783                                                 $dupcheck_qpart = "";
 784                                         }
 785
 786                                         /* Collect article tags here so we could filter by them: */
 787
 788                                         $article_filters = get_article_filters($filters, $entry_title,
 789                                                 $entry_content, $entry_link, $entry_timestamp, $entry_author,
 790                                                 $entry_tags);
 791
 792                                         if ($debug_enabled) {
 793                                                 _debug("update_rss_feed: article filters: ");
 794                                                 if (count($article_filters) != 0) {
 795                                                         print_r($article_filters);
 796                                                 }
 797                                         }
 798
 799                                         if (find_article_filter($article_filters, "filter")) {
 800                                                 db_query($link, "COMMIT"); // close transaction in progress
 801                                                 continue;
 802                                         }
 803
 804                                         $score = calculate_article_score($article_filters);
 805
 806                                         if ($debug_enabled) {
 807                                                 _debug("update_rss_feed: initial score: $score");
 808                                         }
 809
 810                                         $query = "SELECT ref_id, int_id FROM ttrss_user_entries WHERE
 811                                                         ref_id = '$ref_id' AND owner_uid = '$owner_uid'
 812                                                         $dupcheck_qpart";
 813
 814 //                                      if ($_REQUEST["xdebug"]) print "$query\n";
 815
 816                                         $result = db_query($link, $query);
 817
 818                                         // okay it doesn't exist - create user entry
 819                                         if (db_num_rows($result) == 0) {
 820
 821                                                 if ($debug_enabled) {
 822                                                         _debug("update_rss_feed: user record not found, creating...");
 823                                                 }
 824
 825                                                 if ($score >= -500 && !find_article_filter($article_filters, 'catchup')) {
 826                                                         $unread = 'true';
 827                                                         $last_read_qpart = 'NULL';
 828                                                 } else {
 829                                                         $unread = 'false';
 830                                                         $last_read_qpart = 'NOW()';
 831                                                 }
 832
 833                                                 if (find_article_filter($article_filters, 'mark') || $score > 1000) {
 834                                                         $marked = 'true';
 835                                                 } else {
 836                                                         $marked = 'false';
 837                                                 }
 838
 839                                                 if (find_article_filter($article_filters, 'publish')) {
 840                                                         $published = 'true';
 841                                                 } else {
 842                                                         $published = 'false';
 843                                                 }
 844
 845                                                 // N-grams
 846
 847                                                 if (DB_TYPE == "pgsql" and defined('_NGRAM_TITLE_DUPLICATE_THRESHOLD')) {
 848
 849                                                         $result = db_query($link, "SELECT COUNT(*) AS similar FROM
 850                                                                         ttrss_entries,ttrss_user_entries
 851                                                                 WHERE ref_id = id AND updated >= NOW() - INTERVAL '7 day'
 852                                                                         AND similarity(title, '$entry_title') >= "._NGRAM_TITLE_DUPLICATE_THRESHOLD."
 853                                                                         AND owner_uid = $owner_uid");
 854
 855                                                         $ngram_similar = db_fetch_result($result, 0, "similar");
 856
 857                                                         if ($debug_enabled) {
 858                                                                 _debug("update_rss_feed: N-gram similar results: $ngram_similar");
 859                                                         }
 860
 861                                                         if ($ngram_similar > 0) {
 862                                                                 $unread = 'false';
 863                                                         }
 864                                                 }
 865
 866                                                 $last_marked = ($marked == 'true') ? 'NOW()' : 'NULL';
 867                                                 $last_published = ($published == 'true') ? 'NOW()' : 'NULL';
 868
 869                                                 $result = db_query($link,
 870                                                         "INSERT INTO ttrss_user_entries
 871                                                                 (ref_id, owner_uid, feed_id, unread, last_read, marked,
 872                                                                 published, score, tag_cache, label_cache, uuid,
 873                                                                 last_marked, last_published)
 874                                                         VALUES ('$ref_id', '$owner_uid', '$feed', $unread,
 875                                                                 $last_read_qpart, $marked, $published, '$score', '', '',
 876                                                                 '', $last_marked, $last_published)");
 877
 878                                                 if (PUBSUBHUBBUB_HUB && $published == 'true') {
 879                                                         $rss_link = get_self_url_prefix() .
 880                                                                 "/public.php?op=rss&id=-2&key=" .
 881                                                                 get_feed_access_key($link, -2, false, $owner_uid);
 882
 883                                                         $p = new Publisher(PUBSUBHUBBUB_HUB);
 884
 885                                                         $pubsub_result = $p->publish_update($rss_link);
 886                                                 }
 887
 888                                                 $result = db_query($link,
 889                                                         "SELECT int_id FROM ttrss_user_entries WHERE
 890                                                                 ref_id = '$ref_id' AND owner_uid = '$owner_uid' AND
 891                                                                 feed_id = '$feed' LIMIT 1");
 892
 893                                                 if (db_num_rows($result) == 1) {
 894                                                         $entry_int_id = db_fetch_result($result, 0, "int_id");
 895                                                 }
 896                                         } else {
 897                                                 if ($debug_enabled) {
 898                                                         _debug("update_rss_feed: user record FOUND");
 899                                                 }
 900
 901                                                 $entry_ref_id = db_fetch_result($result, 0, "ref_id");
 902                                                 $entry_int_id = db_fetch_result($result, 0, "int_id");
 903                                         }
 904
 905                                         if ($debug_enabled) {
 906                                                 _debug("update_rss_feed: RID: $entry_ref_id, IID: $entry_int_id");
 907                                         }
 908
 909                                         $post_needs_update = false;
 910                                         $update_insignificant = false;
 911
 912                                         if ($orig_num_comments != $num_comments) {
 913                                                 $post_needs_update = true;
 914                                                 $update_insignificant = true;
 915                                         }
 916
 917                                         if ($entry_plugin_data != $orig_plugin_data) {
 918                                                 $post_needs_update = true;
 919                                                 $update_insignificant = true;
 920                                         }
 921
 922                                         if ($content_hash != $orig_content_hash) {
 923                                                 $post_needs_update = true;
 924                                                 $update_insignificant = false;
 925                                         }
 926
 927                                         if (db_escape_string($link, $orig_title) != $entry_title) {
 928                                                 $post_needs_update = true;
 929                                                 $update_insignificant = false;
 930                                         }
 931
 932                                         // if post needs update, update it and mark all user entries
 933                                         // linking to this post as updated
 934                                         if ($post_needs_update) {
 935
 936                                                 if (defined('DAEMON_EXTENDED_DEBUG')) {
 937                                                         _debug("update_rss_feed: post $entry_guid needs update...");
 938                                                 }
 939
 940 //                                              print "<!-- post $orig_title needs update : $post_needs_update -->";
 941
 942                                                 db_query($link, "UPDATE ttrss_entries
 943                                                         SET title = '$entry_title', content = '$entry_content',
 944                                                                 content_hash = '$content_hash',
 945                                                                 updated = '$entry_timestamp_fmt',
 946                                                                 num_comments = '$num_comments',
 947                                                                 plugin_data = '$entry_plugin_data'
 948                                                         WHERE id = '$ref_id'");
 949
 950                                                 if (!$update_insignificant) {
 951                                                         if ($mark_unread_on_update) {
 952                                                                 db_query($link, "UPDATE ttrss_user_entries
 953                                                                         SET last_read = null, unread = true WHERE ref_id = '$ref_id'");
 954                                                         }
 955                                                 }
 956                                         }
 957                                 }
 958
 959                                 db_query($link, "COMMIT");
 960
 961                                 if ($debug_enabled) {
 962                                         _debug("update_rss_feed: assigning labels...");
 963                                 }
 964
 965                                 assign_article_to_label_filters($link, $entry_ref_id, $article_filters,
 966                                         $owner_uid, $article_labels);
 967
 968                                 if ($debug_enabled) {
 969                                         _debug("update_rss_feed: looking for enclosures...");
 970                                 }
 971
 972                                 // enclosures
 973
 974                                 $enclosures = array();
 975
 976                                 $encs = $item->get_enclosures();
 977
 978                                 if (is_array($encs)) {
 979                                         foreach ($encs as $e) {
 980                                                 $e_item = array(
 981                                                         $e->link, $e->type, $e->length);
 982                                                 array_push($enclosures, $e_item);
 983                                         }
 984                                 }
 985
 986                                 if ($debug_enabled) {
 987                                         _debug("update_rss_feed: article enclosures:");
 988                                         print_r($enclosures);
 989                                 }
 990
 991                                 db_query($link, "BEGIN");
 992
 993                                 foreach ($enclosures as $enc) {
 994                                         $enc_url = db_escape_string($link, $enc[0]);
 995                                         $enc_type = db_escape_string($link, $enc[1]);
 996                                         $enc_dur = db_escape_string($link, $enc[2]);
 997
 998                                         $result = db_query($link, "SELECT id FROM ttrss_enclosures
 999                                                 WHERE content_url = '$enc_url' AND post_id = '$entry_ref_id'");
1000
1001                                         if (db_num_rows($result) == 0) {
1002                                                 db_query($link, "INSERT INTO ttrss_enclosures
1003                                                         (content_url, content_type, title, duration, post_id) VALUES
1004                                                         ('$enc_url', '$enc_type', '', '$enc_dur', '$entry_ref_id')");
1005                                         }
1006                                 }
1007
1008                                 db_query($link, "COMMIT");
1009
1010                                 // check for manual tags (we have to do it here since they're loaded from filters)
1011
1012                                 foreach ($article_filters as $f) {
1013                                         if ($f["type"] == "tag") {
1014
1015                                                 $manual_tags = trim_array(explode(",", $f["param"]));
1016
1017                                                 foreach ($manual_tags as $tag) {
1018                                                         if (tag_is_valid($tag)) {
1019                                                                 array_push($entry_tags, $tag);
1020                                                         }
1021                                                 }
1022                                         }
1023                                 }
1024
1025                                 // Skip boring tags
1026
1027                                 $boring_tags = trim_array(explode(",", mb_strtolower(get_pref($link,
1028                                         'BLACKLISTED_TAGS', $owner_uid, ''), 'utf-8')));
1029
1030                                 $filtered_tags = array();
1031                                 $tags_to_cache = array();
1032
1033                                 if ($entry_tags && is_array($entry_tags)) {
1034                                         foreach ($entry_tags as $tag) {
1035                                                 if (array_search($tag, $boring_tags) === false) {
1036                                                         array_push($filtered_tags, $tag);
1037                                                 }
1038                                         }
1039                                 }
1040
1041                                 $filtered_tags = array_unique($filtered_tags);
1042
1043                                 if ($debug_enabled) {
1044                                         _debug("update_rss_feed: filtered article tags:");
1045                                         print_r($filtered_tags);
1046                                 }
1047
1048                                 // Save article tags in the database
1049
1050                                 if (count($filtered_tags) > 0) {
1051
1052                                         db_query($link, "BEGIN");
1053
1054                                         foreach ($filtered_tags as $tag) {
1055
1056                                                 $tag = sanitize_tag($tag);
1057                                                 $tag = db_escape_string($link, $tag);
1058
1059                                                 if (!tag_is_valid($tag)) continue;
1060
1061                                                 $result = db_query($link, "SELECT id FROM ttrss_tags
1062                                                         WHERE tag_name = '$tag' AND post_int_id = '$entry_int_id' AND
1063                                                         owner_uid = '$owner_uid' LIMIT 1");
1064
1065                                                         if ($result && db_num_rows($result) == 0) {
1066
1067                                                                 db_query($link, "INSERT INTO ttrss_tags
1068                                                                         (owner_uid,tag_name,post_int_id)
1069                                                                         VALUES ('$owner_uid','$tag', '$entry_int_id')");
1070                                                         }
1071
1072                                                 array_push($tags_to_cache, $tag);
1073                                         }
1074
1075                                         /* update the cache */
1076
1077                                         $tags_to_cache = array_unique($tags_to_cache);
1078
1079                                         $tags_str = db_escape_string($link, join(",", $tags_to_cache));
1080
1081                                         db_query($link, "UPDATE ttrss_user_entries
1082                                                 SET tag_cache = '$tags_str' WHERE ref_id = '$entry_ref_id'
1083                                                 AND owner_uid = $owner_uid");
1084
1085                                         db_query($link, "COMMIT");
1086                                 }
1087
1088                                 if (get_pref($link, "AUTO_ASSIGN_LABELS", $owner_uid, false)) {
1089                                         if ($debug_enabled) {
1090                                                 _debug("update_rss_feed: auto-assigning labels...");
1091                                         }
1092
1093                                         foreach ($labels as $label) {
1094                                                 $caption = preg_quote($label["caption"]);
1095
1096                                                 if ($caption && preg_match("/\b$caption\b/i", "$tags_str " . strip_tags($entry_content) . " $entry_title")) {
1097                                                         if (!labels_contains_caption($article_labels, $caption)) {
1098                                                                 label_add_article($link, $entry_ref_id, $caption, $owner_uid);
1099                                                         }
1100                                                 }
1101                                         }
1102                                 }
1103
1104                                 if ($debug_enabled) {
1105                                         _debug("update_rss_feed: article processed");
1106                                 }
1107                         }
1108
1109                         if (!$last_updated) {
1110                                 if ($debug_enabled) {
1111                                         _debug("update_rss_feed: new feed, catching it up...");
1112                                 }
1113                                 catchup_feed($link, $feed, false, $owner_uid);
1114                         }
1115
1116                         if ($debug_enabled) {
1117                                 _debug("purging feed...");
1118                         }
1119
1120                         purge_feed($link, $feed, 0, $debug_enabled);
1121
1122                         db_query($link, "UPDATE ttrss_feeds
1123                                 SET last_updated = NOW(), last_error = '' WHERE id = '$feed'");
1124
1125 //                      db_query($link, "COMMIT");
1126
1127                 } else {
1128
1129                         $error_msg = db_escape_string($link, mb_substr($rss->error(), 0, 245));
1130
1131                         if ($debug_enabled) {
1132                                 _debug("update_rss_feed: error fetching feed: $error_msg");
1133                         }
1134
1135                         db_query($link,
1136                                 "UPDATE ttrss_feeds SET last_error = '$error_msg',
1137                                         last_updated = NOW() WHERE id = '$feed'");
1138                 }
1139
1140                 unset($rss);
1141
1142                 if ($debug_enabled) {
1143                         _debug("update_rss_feed: done");
1144                 }
1145
1146         }
1147
1148         function cache_images($html, $site_url, $debug) {
1149                 $cache_dir = CACHE_DIR . "/images";
1150
1151                 libxml_use_internal_errors(true);
1152
1153                 $charset_hack = '<head>
1154                         <meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
1155                 </head>';
1156
1157                 $doc = new DOMDocument();
1158                 $doc->loadHTML($charset_hack . $html);
1159                 $xpath = new DOMXPath($doc);
1160
1161                 $entries = $xpath->query('(//img[@src])');
1162
1163                 foreach ($entries as $entry) {
1164                         if ($entry->hasAttribute('src')) {
1165                                 $src = rewrite_relative_url($site_url, $entry->getAttribute('src'));
1166
1167                                 $local_filename = CACHE_DIR . "/images/" . sha1($src) . ".png";
1168
1169                                 if ($debug) _debug("cache_images: downloading: $src to $local_filename");
1170
1171                                 if (!file_exists($local_filename)) {
1172                                         $file_content = fetch_file_contents($src);
1173
1174                                         if ($file_content && strlen($file_content) > 1024) {
1175                                                 file_put_contents($local_filename, $file_content);
1176                                         }
1177                                 }
1178
1179                                 if (file_exists($local_filename)) {
1180                                         $entry->setAttribute('src', SELF_URL_PATH . '/image.php?url=' .
1181                                                 base64_encode($src));
1182                                 }
1183                         }
1184                 }
1185
1186                 $node = $doc->getElementsByTagName('body')->item(0);
1187
1188                 return $doc->saveXML($node);
1189         }
1190
1191         function expire_lock_files($debug) {
1192                 if ($debug) _debug("Removing old lock files...");
1193
1194                 $num_deleted = 0;
1195
1196                 if (is_writable(LOCK_DIRECTORY)) {
1197                         $files = glob(LOCK_DIRECTORY . "/*.lock");
1198
1199                         if ($files) {
1200                                 foreach ($files as $file) {
1201                                         if (!file_is_locked($file) && time() - filemtime($file) > 86400*2) {
1202                                                 unlink($file);
1203                                                 ++$num_deleted;
1204                                         }
1205                                 }
1206                         }
1207                 }
1208
1209                 if ($debug) _debug("Removed $num_deleted files.");
1210         }
1211
1212         function expire_cached_files($debug) {
1213                 foreach (array("simplepie", "images", "export", "upload") as $dir) {
1214                         $cache_dir = CACHE_DIR . "/$dir";
1215
1216                         if ($debug) _debug("Expiring $cache_dir");
1217
1218                         $num_deleted = 0;
1219
1220                         if (is_writable($cache_dir)) {
1221                                 $files = glob("$cache_dir/*");
1222
1223                                 if ($files) {
1224                                         foreach ($files as $file) {
1225                                                 if (time() - filemtime($file) > 86400*7) {
1226                                                         unlink($file);
1227
1228                                                         ++$num_deleted;
1229                                                 }
1230                                         }
1231                                 }
1232                         }
1233
1234                         if ($debug) _debug("Removed $num_deleted files.");
1235                 }
1236         }
1237
1238         /**
1239         * Source: http://www.php.net/manual/en/function.parse-url.php#104527
1240         * Returns the url query as associative array
1241         *
1242         * @param    string    query
1243         * @return    array    params
1244         */
1245         function convertUrlQuery($query) {
1246                 $queryParts = explode('&', $query);
1247
1248                 $params = array();
1249
1250                 foreach ($queryParts as $param) {
1251                         $item = explode('=', $param);
1252                         $params[$item[0]] = $item[1];
1253                 }
1254
1255                 return $params;
1256         }
1257
1258         function get_article_filters($filters, $title, $content, $link, $timestamp, $author, $tags) {
1259                 $matches = array();
1260
1261                 foreach ($filters as $filter) {
1262                         $match_any_rule = $filter["match_any_rule"];
1263                         $inverse = $filter["inverse"];
1264                         $filter_match = false;
1265
1266                         foreach ($filter["rules"] as $rule) {
1267                                 $match = false;
1268                                 $reg_exp = $rule["reg_exp"];
1269                                 $rule_inverse = $rule["inverse"];
1270
1271                                 if (!$reg_exp)
1272                                         continue;
1273
1274                                 switch ($rule["type"]) {
1275                                 case "title":
1276                                         $match = @preg_match("/$reg_exp/i", $title);
1277                                         break;
1278                                 case "content":
1279                                         // we don't need to deal with multiline regexps
1280                                         $content = preg_replace("/[\r\n\t]/", "", $content);
1281
1282                                         $match = @preg_match("/$reg_exp/i", $content);
1283                                         break;
1284                                 case "both":
1285                                         // we don't need to deal with multiline regexps
1286                                         $content = preg_replace("/[\r\n\t]/", "", $content);
1287
1288                                         $match = (@preg_match("/$reg_exp/i", $title) || @preg_match("/$reg_exp/i", $content));
1289                                         break;
1290                                 case "link":
1291                                         $match = @preg_match("/$reg_exp/i", $link);
1292                                         break;
1293                                 case "author":
1294                                         $match = @preg_match("/$reg_exp/i", $author);
1295                                         break;
1296                                 case "tag":
1297                                         $tag_string = join(",", $tags);
1298                                         $match = @preg_match("/$reg_exp/i", $tag_string);
1299                                         break;
1300                                 }
1301
1302                                 if ($rule_inverse) $match = !$match;
1303
1304                                 if ($match_any_rule) {
1305                                         if ($match) {
1306                                                 $filter_match = true;
1307                                                 break;
1308                                         }
1309                                 } else {
1310                                         $filter_match = $match;
1311                                         if (!$match) {
1312                                                 break;
1313                                         }
1314                                 }
1315                         }
1316
1317                         if ($inverse) $filter_match = !$filter_match;
1318
1319                         if ($filter_match) {
1320                                 foreach ($filter["actions"] AS $action) {
1321                                         array_push($matches, $action);
1322
1323                                         // if Stop action encountered, perform no further processing
1324                                         if ($action["type"] == "stop") return $matches;
1325                                 }
1326                         }
1327                 }
1328
1329                 return $matches;
1330         }
1331
1332         function find_article_filter($filters, $filter_name) {
1333                 foreach ($filters as $f) {
1334                         if ($f["type"] == $filter_name) {
1335                                 return $f;
1336                         };
1337                 }
1338                 return false;
1339         }
1340
1341         function find_article_filters($filters, $filter_name) {
1342                 $results = array();
1343
1344                 foreach ($filters as $f) {
1345                         if ($f["type"] == $filter_name) {
1346                                 array_push($results, $f);
1347                         };
1348                 }
1349                 return $results;
1350         }
1351
1352         function calculate_article_score($filters) {
1353                 $score = 0;
1354
1355                 foreach ($filters as $f) {
1356                         if ($f["type"] == "score") {
1357                                 $score += $f["param"];
1358                         };
1359                 }
1360                 return $score;
1361         }
1362
1363         function labels_contains_caption($labels, $caption) {
1364                 foreach ($labels as $label) {
1365                         if ($label[1] == $caption) {
1366                                 return true;
1367                         }
1368                 }
1369
1370                 return false;
1371         }
1372
1373         function assign_article_to_label_filters($link, $id, $filters, $owner_uid, $article_labels) {
1374                 foreach ($filters as $f) {
1375                         if ($f["type"] == "label") {
1376                                 if (!labels_contains_caption($article_labels, $f["param"])) {
1377                                         label_add_article($link, $id, $f["param"], $owner_uid);
1378                                 }
1379                         }
1380                 }
1381         }
1382
1383         function make_guid_from_title($title) {
1384                 return preg_replace("/[ \"\',.:;]/", "-",
1385                         mb_strtolower(strip_tags($title), 'utf-8'));
1386         }
1387
1388
1389 ?>