include/functions.php

   1 <?php
   2         define('EXPECTED_CONFIG_VERSION', 26);
   3         define('SCHEMA_VERSION', 134);
   4
   5         define('LABEL_BASE_INDEX', -1024);
   6         define('PLUGIN_FEED_BASE_INDEX', -128);
   7
   8         define('COOKIE_LIFETIME_LONG', 86400*365);
   9
  10         $fetch_last_error = false;
  11         $fetch_last_error_code = false;
  12         $fetch_last_content_type = false;
  13         $fetch_last_error_content = false; // curl only for the time being
  14         $fetch_effective_url = false;
  15         $fetch_curl_used = false;
  16
  17         libxml_disable_entity_loader(true);
  18
  19         // separate test because this is included before sanity checks
  20         if (function_exists("mb_internal_encoding")) mb_internal_encoding("UTF-8");
  21
  22         date_default_timezone_set('UTC');
  23         if (defined('E_DEPRECATED')) {
  24                 error_reporting(E_ALL & ~E_NOTICE & ~E_DEPRECATED);
  25         } else {
  26                 error_reporting(E_ALL & ~E_NOTICE);
  27         }
  28
  29         require_once 'config.php';
  30
  31         /**
  32          * Define a constant if not already defined
  33          */
  34         function define_default($name, $value) {
  35                 defined($name) or define($name, $value);
  36         }
  37
  38         /* Some tunables you can override in config.php using define(): */
  39
  40         define_default('FEED_FETCH_TIMEOUT', 45);
  41         // How may seconds to wait for response when requesting feed from a site
  42         define_default('FEED_FETCH_NO_CACHE_TIMEOUT', 15);
  43         // How may seconds to wait for response when requesting feed from a
  44         // site when that feed wasn't cached before
  45         define_default('FILE_FETCH_TIMEOUT', 45);
  46         // Default timeout when fetching files from remote sites
  47         define_default('FILE_FETCH_CONNECT_TIMEOUT', 15);
  48         // How many seconds to wait for initial response from website when
  49         // fetching files from remote sites
  50         define_default('DAEMON_UPDATE_LOGIN_LIMIT', 30);
  51         // stop updating feeds if users haven't logged in for X days
  52         define_default('DAEMON_FEED_LIMIT', 500);
  53         // feed limit for one update batch
  54         define_default('DAEMON_SLEEP_INTERVAL', 120);
  55         // default sleep interval between feed updates (sec)
  56         define_default('MIN_CACHE_FILE_SIZE', 1024);
  57         // do not cache files smaller than that (bytes)
  58         define_default('MAX_CACHE_FILE_SIZE', 64*1024*1024);
  59         // do not cache files larger than that (bytes)
  60         define_default('MAX_DOWNLOAD_FILE_SIZE', 16*1024*1024);
  61         // do not download general files larger than that (bytes)
  62         define_default('CACHE_MAX_DAYS', 7);
  63         // max age in days for various automatically cached (temporary) files
  64         define_default('MAX_CONDITIONAL_INTERVAL', 3600*12);
  65         // max interval between forced unconditional updates for servers
  66         // not complying with http if-modified-since (seconds)
  67
  68         /* tunables end here */
  69
  70         if (DB_TYPE == "pgsql") {
  71                 define('SUBSTRING_FOR_DATE', 'SUBSTRING_FOR_DATE');
  72         } else {
  73                 define('SUBSTRING_FOR_DATE', 'SUBSTRING');
  74         }
  75
  76         /**
  77          * Return available translations names.
  78          *
  79          * @access public
  80          * @return array A array of available translations.
  81          */
  82         function get_translations() {
  83                 $tr = array(
  84                                         "auto"  => "Detect automatically",
  85                                         "ar_SA" => "العربيّة (Arabic)",
  86                                         "bg_BG" => "Bulgarian",
  87                                         "da_DA" => "Dansk",
  88                                         "ca_CA" => "Català",
  89                                         "cs_CZ" => "Česky",
  90                                         "en_US" => "English",
  91                                         "el_GR" => "Ελληνικά",
  92                                         "es_ES" => "Español (España)",
  93                                         "es_LA" => "Español",
  94                                         "de_DE" => "Deutsch",
  95                                         "fr_FR" => "Français",
  96                                         "hu_HU" => "Magyar (Hungarian)",
  97                                         "it_IT" => "Italiano",
  98                                         "ja_JP" => "日本語 (Japanese)",
  99                                         "lv_LV" => "Latviešu",
 100                                         "nb_NO" => "Norwegian bokmål",
 101                                         "nl_NL" => "Dutch",
 102                                         "pl_PL" => "Polski",
 103                                         "ru_RU" => "Русский",
 104                                         "pt_BR" => "Portuguese/Brazil",
 105                                         "pt_PT" => "Portuguese/Portugal",
 106                                         "zh_CN" => "Simplified Chinese",
 107                                         "zh_TW" => "Traditional Chinese",
 108                                         "sv_SE" => "Svenska",
 109                                         "fi_FI" => "Suomi",
 110                                         "tr_TR" => "Türkçe");
 111
 112                 return $tr;
 113         }
 114
 115         require_once "lib/accept-to-gettext.php";
 116         require_once "lib/gettext/gettext.inc";
 117
 118         function startup_gettext() {
 119
 120                 # Get locale from Accept-Language header
 121                 $lang = al2gt(array_keys(get_translations()), "text/html");
 122
 123                 if (defined('_TRANSLATION_OVERRIDE_DEFAULT')) {
 124                         $lang = _TRANSLATION_OVERRIDE_DEFAULT;
 125                 }
 126
 127                 if ($_SESSION["uid"] && get_schema_version() >= 120) {
 128                         $pref_lang = get_pref("USER_LANGUAGE", $_SESSION["uid"]);
 129
 130                         if ($pref_lang && $pref_lang != 'auto') {
 131                                 $lang = $pref_lang;
 132                         }
 133                 }
 134
 135                 if ($lang) {
 136                         if (defined('LC_MESSAGES')) {
 137                                 _setlocale(LC_MESSAGES, $lang);
 138                         } else if (defined('LC_ALL')) {
 139                                 _setlocale(LC_ALL, $lang);
 140                         }
 141
 142                         _bindtextdomain("messages", "locale");
 143
 144                         _textdomain("messages");
 145                         _bind_textdomain_codeset("messages", "UTF-8");
 146                 }
 147         }
 148
 149         require_once 'db-prefs.php';
 150         require_once 'version.php';
 151         require_once 'controls.php';
 152
 153         define('SELF_USER_AGENT', 'Tiny Tiny RSS/' . VERSION . ' (http://tt-rss.org/)');
 154         ini_set('user_agent', SELF_USER_AGENT);
 155
 156         $schema_version = false;
 157
 158         // TODO: compat wrapper, remove at some point
 159         function _debug($msg) {
 160             Debug::log($msg);
 161         }
 162
 163         /**
 164          * Purge a feed old posts.
 165          *
 166          * @param mixed $link A database connection.
 167          * @param mixed $feed_id The id of the purged feed.
 168          * @param mixed $purge_interval Olderness of purged posts.
 169          * @param boolean $debug Set to True to enable the debug. False by default.
 170          * @access public
 171          * @return void
 172          */
 173         function purge_feed($feed_id, $purge_interval) {
 174
 175                 if (!$purge_interval) $purge_interval = feed_purge_interval($feed_id);
 176
 177                 $pdo = Db::pdo();
 178
 179                 $sth = $pdo->prepare("SELECT owner_uid FROM ttrss_feeds WHERE id = ?");
 180                 $sth->execute([$feed_id]);
 181
 182                 $owner_uid = false;
 183
 184                 if ($row = $sth->fetch()) {
 185                         $owner_uid = $row["owner_uid"];
 186                 }
 187
 188                 if ($purge_interval == -1 || !$purge_interval) {
 189                         if ($owner_uid) {
 190                                 CCache::update($feed_id, $owner_uid);
 191                         }
 192                         return;
 193                 }
 194
 195                 if (!$owner_uid) return;
 196
 197                 if (FORCE_ARTICLE_PURGE == 0) {
 198                         $purge_unread = get_pref("PURGE_UNREAD_ARTICLES",
 199                                 $owner_uid, false);
 200                 } else {
 201                         $purge_unread = true;
 202                         $purge_interval = FORCE_ARTICLE_PURGE;
 203                 }
 204
 205                 if (!$purge_unread)
 206                         $query_limit = " unread = false AND ";
 207                 else
 208                         $query_limit = "";
 209
 210                 $purge_interval = (int) $purge_interval;
 211
 212                 if (DB_TYPE == "pgsql") {
 213                         $sth = $pdo->prepare("DELETE FROM ttrss_user_entries
 214                                 USING ttrss_entries
 215                                 WHERE ttrss_entries.id = ref_id AND
 216                                 marked = false AND
 217                                 feed_id = ? AND
 218                                 $query_limit
 219                                 ttrss_entries.date_updated < NOW() - INTERVAL '$purge_interval days'");
 220                         $sth->execute([$feed_id]);
 221
 222                 } else {
 223                         $sth  = $pdo->prepare("DELETE FROM ttrss_user_entries
 224                                 USING ttrss_user_entries, ttrss_entries
 225                                 WHERE ttrss_entries.id = ref_id AND
 226                                 marked = false AND
 227                                 feed_id = ? AND
 228                                 $query_limit
 229                                 ttrss_entries.date_updated < DATE_SUB(NOW(), INTERVAL $purge_interval DAY)");
 230                         $sth->execute([$feed_id]);
 231
 232                 }
 233
 234                 $rows = $sth->rowCount();
 235
 236                 CCache::update($feed_id, $owner_uid);
 237
 238         Debug::log("Purged feed $feed_id ($purge_interval): deleted $rows articles");
 239
 240                 return $rows;
 241         } // function purge_feed
 242
 243         function feed_purge_interval($feed_id) {
 244
 245                 $pdo = DB::pdo();
 246
 247                 $sth = $pdo->prepare("SELECT purge_interval, owner_uid FROM ttrss_feeds
 248                         WHERE id = ?");
 249                 $sth->execute([$feed_id]);
 250
 251                 if ($row = $sth->fetch()) {
 252                         $purge_interval = $row["purge_interval"];
 253                         $owner_uid = $row["owner_uid"];
 254
 255                         if ($purge_interval == 0) $purge_interval = get_pref(
 256                                 'PURGE_OLD_DAYS', $owner_uid);
 257
 258                         return $purge_interval;
 259
 260                 } else {
 261                         return -1;
 262                 }
 263         }
 264
 265         // TODO: max_size currently only works for CURL transfers
 266         // TODO: multiple-argument way is deprecated, first parameter is a hash now
 267         function fetch_file_contents($options /* previously: 0: $url , 1: $type = false, 2: $login = false, 3: $pass = false,
 268                                 4: $post_query = false, 5: $timeout = false, 6: $timestamp = 0, 7: $useragent = false*/) {
 269
 270                 global $fetch_last_error;
 271                 global $fetch_last_error_code;
 272                 global $fetch_last_error_content;
 273                 global $fetch_last_content_type;
 274                 global $fetch_last_modified;
 275                 global $fetch_effective_url;
 276                 global $fetch_curl_used;
 277
 278                 $fetch_last_error = false;
 279                 $fetch_last_error_code = -1;
 280                 $fetch_last_error_content = "";
 281                 $fetch_last_content_type = "";
 282                 $fetch_curl_used = false;
 283                 $fetch_last_modified = "";
 284                 $fetch_effective_url = "";
 285
 286                 if (!is_array($options)) {
 287
 288                         // falling back on compatibility shim
 289                         $option_names = [ "url", "type", "login", "pass", "post_query", "timeout", "last_modified", "useragent" ];
 290                         $tmp = [];
 291
 292                         for ($i = 0; $i < func_num_args(); $i++) {
 293                                 $tmp[$option_names[$i]] = func_get_arg($i);
 294                         }
 295
 296                         $options = $tmp;
 297
 298                         /*$options = array(
 299                                         "url" => func_get_arg(0),
 300                                         "type" => @func_get_arg(1),
 301                                         "login" => @func_get_arg(2),
 302                                         "pass" => @func_get_arg(3),
 303                                         "post_query" => @func_get_arg(4),
 304                                         "timeout" => @func_get_arg(5),
 305                                         "timestamp" => @func_get_arg(6),
 306                                         "useragent" => @func_get_arg(7)
 307                         ); */
 308                 }
 309
 310                 $url = $options["url"];
 311                 $type = isset($options["type"]) ? $options["type"] : false;
 312                 $login = isset($options["login"]) ? $options["login"] : false;
 313                 $pass = isset($options["pass"]) ? $options["pass"] : false;
 314                 $post_query = isset($options["post_query"]) ? $options["post_query"] : false;
 315                 $timeout = isset($options["timeout"]) ? $options["timeout"] : false;
 316                 $last_modified = isset($options["last_modified"]) ? $options["last_modified"] : "";
 317                 $useragent = isset($options["useragent"]) ? $options["useragent"] : false;
 318                 $followlocation = isset($options["followlocation"]) ? $options["followlocation"] : true;
 319                 $max_size = isset($options["max_size"]) ? $options["max_size"] : MAX_DOWNLOAD_FILE_SIZE; // in bytes
 320                 $http_accept = isset($options["http_accept"]) ? $options["http_accept"] : false;
 321
 322                 $url = ltrim($url, ' ');
 323                 $url = str_replace(' ', '%20', $url);
 324
 325                 if (strpos($url, "//") === 0)
 326                         $url = 'http:' . $url;
 327
 328                 if (!defined('NO_CURL') && function_exists('curl_init') && !ini_get("open_basedir")) {
 329
 330                         $fetch_curl_used = true;
 331
 332                         $ch = curl_init($url);
 333
 334                         $curl_http_headers = [];
 335
 336                         if ($last_modified && !$post_query)
 337                                 array_push($curl_http_headers, "If-Modified-Since: $last_modified");
 338
 339                         if ($http_accept)
 340                                 array_push($curl_http_headers, "Accept: " . $http_accept);
 341
 342                         if (count($curl_http_headers) > 0)
 343                                 curl_setopt($ch, CURLOPT_HTTPHEADER, $curl_http_headers);
 344
 345                         curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, $timeout ? $timeout : FILE_FETCH_CONNECT_TIMEOUT);
 346                         curl_setopt($ch, CURLOPT_TIMEOUT, $timeout ? $timeout : FILE_FETCH_TIMEOUT);
 347                         curl_setopt($ch, CURLOPT_FOLLOWLOCATION, !ini_get("open_basedir") && $followlocation);
 348                         curl_setopt($ch, CURLOPT_MAXREDIRS, 20);
 349                         curl_setopt($ch, CURLOPT_BINARYTRANSFER, true);
 350                         curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
 351                         curl_setopt($ch, CURLOPT_HEADER, true);
 352                         curl_setopt($ch, CURLOPT_HTTPAUTH, CURLAUTH_ANY);
 353                         curl_setopt($ch, CURLOPT_USERAGENT, $useragent ? $useragent :
 354                                 SELF_USER_AGENT);
 355                         curl_setopt($ch, CURLOPT_ENCODING, "");
 356                         //curl_setopt($ch, CURLOPT_REFERER, $url);
 357
 358                         if ($max_size) {
 359                                 curl_setopt($ch, CURLOPT_NOPROGRESS, false);
 360                                 curl_setopt($ch, CURLOPT_BUFFERSIZE, 16384); // needed to get 5 arguments in progress function?
 361
 362                                 // holy shit closures in php
 363                                 // download & upload are *expected* sizes respectively, could be zero
 364                                 curl_setopt($ch, CURLOPT_PROGRESSFUNCTION, function($curl_handle, $download_size, $downloaded, $upload_size, $uploaded) use( &$max_size) {
 365                                         Debug::log("[curl progressfunction] $downloaded $max_size", Debug::$LOG_EXTENDED);
 366
 367                                         return ($downloaded > $max_size) ? 1 : 0; // if max size is set, abort when exceeding it
 368                                 });
 369
 370                         }
 371
 372                         if (!ini_get("open_basedir")) {
 373                                 curl_setopt($ch, CURLOPT_COOKIEJAR, "/dev/null");
 374                         }
 375
 376                         if (defined('_HTTP_PROXY')) {
 377                                 curl_setopt($ch, CURLOPT_PROXY, _HTTP_PROXY);
 378                         }
 379
 380                         if ($post_query) {
 381                                 curl_setopt($ch, CURLOPT_POST, true);
 382                                 curl_setopt($ch, CURLOPT_POSTFIELDS, $post_query);
 383                         }
 384
 385                         if ($login && $pass)
 386                                 curl_setopt($ch, CURLOPT_USERPWD, "$login:$pass");
 387
 388                         $ret = @curl_exec($ch);
 389
 390                         $headers_length = curl_getinfo($ch, CURLINFO_HEADER_SIZE);
 391                         $headers = explode("\r\n", substr($ret, 0, $headers_length));
 392                         $contents = substr($ret, $headers_length);
 393
 394                         foreach ($headers as $header) {
 395                                 if (strstr($header, ": ") !== FALSE) {
 396                                         list ($key, $value) = explode(": ", $header);
 397
 398                                         if (strtolower($key) == "last-modified") {
 399                                                 $fetch_last_modified = $value;
 400                                         }
 401                                 }
 402
 403                                 if (substr(strtolower($header), 0, 7) == 'http/1.') {
 404                                         $fetch_last_error_code = (int) substr($header, 9, 3);
 405                                         $fetch_last_error = $header;
 406                                 }
 407                         }
 408
 409                         if (curl_errno($ch) === 23 || curl_errno($ch) === 61) {
 410                                 curl_setopt($ch, CURLOPT_ENCODING, 'none');
 411                                 $contents = @curl_exec($ch);
 412                         }
 413
 414                         $http_code = curl_getinfo($ch, CURLINFO_HTTP_CODE);
 415                         $fetch_last_content_type = curl_getinfo($ch, CURLINFO_CONTENT_TYPE);
 416
 417                         $fetch_effective_url = curl_getinfo($ch, CURLINFO_EFFECTIVE_URL);
 418
 419                         $fetch_last_error_code = $http_code;
 420
 421                         if ($http_code != 200 || $type && strpos($fetch_last_content_type, "$type") === false) {
 422
 423                                 if (curl_errno($ch) != 0) {
 424                                         $fetch_last_error .=  "; " . curl_errno($ch) . " " . curl_error($ch);
 425                                 }
 426
 427                                 $fetch_last_error_content = $contents;
 428                                 curl_close($ch);
 429                                 return false;
 430                         }
 431
 432                         if (!$contents) {
 433                                 $fetch_last_error = curl_errno($ch) . " " . curl_error($ch);
 434                                 curl_close($ch);
 435                                 return false;
 436                         }
 437
 438                         curl_close($ch);
 439
 440                         return $contents;
 441                 } else {
 442
 443                         $fetch_curl_used = false;
 444
 445                         if ($login && $pass){
 446                                 $url_parts = array();
 447
 448                                 preg_match("/(^[^:]*):\/\/(.*)/", $url, $url_parts);
 449
 450                                 $pass = urlencode($pass);
 451
 452                                 if ($url_parts[1] && $url_parts[2]) {
 453                                         $url = $url_parts[1] . "://$login:$pass@" . $url_parts[2];
 454                                 }
 455                         }
 456
 457                         // TODO: should this support POST requests or not? idk
 458
 459                          $context_options = array(
 460                                   'http' => array(
 461                                                 'header' => array(
 462                                                         'Connection: close'
 463                                                 ),
 464                                                 'method' => 'GET',
 465                                                 'ignore_errors' => true,
 466                                                 'timeout' => $timeout ? $timeout : FILE_FETCH_TIMEOUT,
 467                                                 'protocol_version'=> 1.1)
 468                                   );
 469
 470                         if (!$post_query && $last_modified)
 471                                 array_push($context_options['http']['header'], "If-Modified-Since: $last_modified");
 472
 473                         if ($http_accept)
 474                                 array_push($context_options['http']['header'], "Accept: $http_accept");
 475
 476                         if (defined('_HTTP_PROXY')) {
 477                                 $context_options['http']['request_fulluri'] = true;
 478                                 $context_options['http']['proxy'] = _HTTP_PROXY;
 479                         }
 480
 481                         $context = stream_context_create($context_options);
 482
 483                         $old_error = error_get_last();
 484
 485                         $fetch_effective_url = $url;
 486
 487                         $data = @file_get_contents($url, false, $context);
 488
 489                         if (isset($http_response_header) && is_array($http_response_header)) {
 490                                 foreach ($http_response_header as $header) {
 491                                         if (strstr($header, ": ") !== FALSE) {
 492                                                 list ($key, $value) = explode(": ", $header);
 493
 494                                                 $key = strtolower($key);
 495
 496                                                 if ($key == 'content-type') {
 497                                                         $fetch_last_content_type = $value;
 498                                                         // don't abort here b/c there might be more than one
 499                                                         // e.g. if we were being redirected -- last one is the right one
 500                                                 } else if ($key == 'last-modified') {
 501                                                         $fetch_last_modified = $value;
 502                                                 } else if ($key == 'location') {
 503                                                         $fetch_effective_url = $value;
 504                                                 }
 505                                         }
 506
 507                                         if (substr(strtolower($header), 0, 7) == 'http/1.') {
 508                                                 $fetch_last_error_code = (int) substr($header, 9, 3);
 509                                                 $fetch_last_error = $header;
 510                                         }
 511                                 }
 512                         }
 513
 514                         if ($fetch_last_error_code != 200) {
 515                                 $error = error_get_last();
 516
 517                                 if ($error['message'] != $old_error['message']) {
 518                                         $fetch_last_error .= "; " . $error["message"];
 519                                 }
 520
 521                                 $fetch_last_error_content = $data;
 522
 523                                 return false;
 524                         }
 525                         return $data;
 526                 }
 527
 528         }
 529
 530         /**
 531          * Try to determine the favicon URL for a feed.
 532          * adapted from wordpress favicon plugin by Jeff Minard (http://thecodepro.com/)
 533          * http://dev.wp-plugins.org/file/favatars/trunk/favatars.php
 534          *
 535          * @param string $url A feed or page URL
 536          * @access public
 537          * @return mixed The favicon URL, or false if none was found.
 538          */
 539         function get_favicon_url($url) {
 540
 541                 $favicon_url = false;
 542
 543                 if ($html = @fetch_file_contents($url)) {
 544
 545                         libxml_use_internal_errors(true);
 546
 547                         $doc = new DOMDocument();
 548                         $doc->loadHTML($html);
 549                         $xpath = new DOMXPath($doc);
 550
 551                         $base = $xpath->query('/html/head/base[@href]');
 552                         foreach ($base as $b) {
 553                                 $url = rewrite_relative_url($url, $b->getAttribute("href"));
 554                                 break;
 555                         }
 556
 557                         $entries = $xpath->query('/html/head/link[@rel="shortcut icon" or @rel="icon"]');
 558                         if (count($entries) > 0) {
 559                                 foreach ($entries as $entry) {
 560                                         $favicon_url = rewrite_relative_url($url, $entry->getAttribute("href"));
 561                                         break;
 562                                 }
 563                         }
 564                 }
 565
 566                 if (!$favicon_url)
 567                         $favicon_url = rewrite_relative_url($url, "/favicon.ico");
 568
 569                 return $favicon_url;
 570         } // function get_favicon_url
 571
 572         function initialize_user_prefs($uid, $profile = false) {
 573
 574                 if (get_schema_version() < 63) $profile_qpart = "";
 575
 576                 $pdo = DB::pdo();
 577                 $in_nested_tr = false;
 578
 579                 try {
 580                         $pdo->beginTransaction();
 581                 } catch (Exception $e) {
 582                         $in_nested_tr = true;
 583                 }
 584
 585                 $sth = $pdo->query("SELECT pref_name,def_value FROM ttrss_prefs");
 586
 587                 $profile = $profile ? $profile : null;
 588
 589                 $u_sth = $pdo->prepare("SELECT pref_name
 590                         FROM ttrss_user_prefs WHERE owner_uid = :uid AND
 591                                 (profile = :profile OR (:profile IS NULL AND profile IS NULL))");
 592                 $u_sth->execute([':uid' => $uid, ':profile' => $profile]);
 593
 594                 $active_prefs = array();
 595
 596                 while ($line = $u_sth->fetch()) {
 597                         array_push($active_prefs, $line["pref_name"]);
 598                 }
 599
 600                 while ($line = $sth->fetch()) {
 601                         if (array_search($line["pref_name"], $active_prefs) === FALSE) {
 602 //                              print "adding " . $line["pref_name"] . "<br>";
 603
 604                                 if (get_schema_version() < 63) {
 605                                         $i_sth = $pdo->prepare("INSERT INTO ttrss_user_prefs
 606                                                 (owner_uid,pref_name,value) VALUES
 607                                                 (?, ?, ?)");
 608                                         $i_sth->execute([$uid, $line["pref_name"], $line["def_value"]]);
 609
 610                                 } else {
 611                                         $i_sth = $pdo->prepare("INSERT INTO ttrss_user_prefs
 612                                                 (owner_uid,pref_name,value, profile) VALUES
 613                                                 (?, ?, ?, ?)");
 614                                         $i_sth->execute([$uid, $line["pref_name"], $line["def_value"], $profile]);
 615                                 }
 616
 617                         }
 618                 }
 619
 620                 if (!$in_nested_tr) $pdo->commit();
 621
 622         }
 623
 624         function get_ssl_certificate_id() {
 625                 if ($_SERVER["REDIRECT_SSL_CLIENT_M_SERIAL"]) {
 626                         return sha1($_SERVER["REDIRECT_SSL_CLIENT_M_SERIAL"] .
 627                                 $_SERVER["REDIRECT_SSL_CLIENT_V_START"] .
 628                                 $_SERVER["REDIRECT_SSL_CLIENT_V_END"] .
 629                                 $_SERVER["REDIRECT_SSL_CLIENT_S_DN"]);
 630                 }
 631                 if ($_SERVER["SSL_CLIENT_M_SERIAL"]) {
 632                         return sha1($_SERVER["SSL_CLIENT_M_SERIAL"] .
 633                                 $_SERVER["SSL_CLIENT_V_START"] .
 634                                 $_SERVER["SSL_CLIENT_V_END"] .
 635                                 $_SERVER["SSL_CLIENT_S_DN"]);
 636                 }
 637                 return "";
 638         }
 639
 640         function authenticate_user($login, $password, $check_only = false) {
 641
 642                 if (!SINGLE_USER_MODE) {
 643                         $user_id = false;
 644                         $auth_module = false;
 645
 646                         foreach (PluginHost::getInstance()->get_hooks(PluginHost::HOOK_AUTH_USER) as $plugin) {
 647
 648                                 $user_id = (int) $plugin->authenticate($login, $password);
 649
 650                                 if ($user_id) {
 651                                         $auth_module = strtolower(get_class($plugin));
 652                                         break;
 653                                 }
 654                         }
 655
 656                         if ($user_id && !$check_only) {
 657
 658                                 session_start();
 659                                 session_regenerate_id(true);
 660
 661                                 $_SESSION["uid"] = $user_id;
 662                                 $_SESSION["version"] = VERSION_STATIC;
 663                                 $_SESSION["auth_module"] = $auth_module;
 664
 665                                 $pdo = DB::pdo();
 666                                 $sth = $pdo->prepare("SELECT login,access_level,pwd_hash FROM ttrss_users
 667                                         WHERE id = ?");
 668                                 $sth->execute([$user_id]);
 669                                 $row = $sth->fetch();
 670
 671                                 $_SESSION["name"] = $row["login"];
 672                                 $_SESSION["access_level"] = $row["access_level"];
 673                                 $_SESSION["csrf_token"] = uniqid_short();
 674
 675                                 $usth = $pdo->prepare("UPDATE ttrss_users SET last_login = NOW() WHERE id = ?");
 676                                 $usth->execute([$user_id]);
 677
 678                                 $_SESSION["ip_address"] = $_SERVER["REMOTE_ADDR"];
 679                                 $_SESSION["user_agent"] = sha1($_SERVER['HTTP_USER_AGENT']);
 680                                 $_SESSION["pwd_hash"] = $row["pwd_hash"];
 681
 682                                 $_SESSION["last_version_check"] = time();
 683
 684                                 initialize_user_prefs($_SESSION["uid"]);
 685
 686                                 return true;
 687                         }
 688
 689                         return false;
 690
 691                 } else {
 692
 693                         $_SESSION["uid"] = 1;
 694                         $_SESSION["name"] = "admin";
 695                         $_SESSION["access_level"] = 10;
 696
 697                         $_SESSION["hide_hello"] = true;
 698                         $_SESSION["hide_logout"] = true;
 699
 700                         $_SESSION["auth_module"] = false;
 701
 702                         if (!$_SESSION["csrf_token"]) {
 703                                 $_SESSION["csrf_token"] = uniqid_short();
 704                         }
 705
 706                         $_SESSION["ip_address"] = $_SERVER["REMOTE_ADDR"];
 707
 708                         initialize_user_prefs($_SESSION["uid"]);
 709
 710                         return true;
 711                 }
 712         }
 713
 714         // this is used for user http parameters unless HTML code is actually needed
 715         function clean($param) {
 716                 if (is_array($param)) {
 717                         return array_map("strip_tags", $param);
 718                 } else if (is_string($param)) {
 719                         return strip_tags($param);
 720                 } else {
 721                         return $param;
 722                 }
 723         }
 724
 725         function make_password($length = 8) {
 726
 727                 $password = "";
 728                 $possible = "0123456789abcdfghjkmnpqrstvwxyzABCDFGHJKMNPQRSTVWXYZ";
 729
 730         $i = 0;
 731
 732                 while ($i < $length) {
 733                         $char = substr($possible, mt_rand(0, strlen($possible)-1), 1);
 734
 735                         if (!strstr($password, $char)) {
 736                                 $password .= $char;
 737                                 $i++;
 738                         }
 739                 }
 740                 return $password;
 741         }
 742
 743         // this is called after user is created to initialize default feeds, labels
 744         // or whatever else
 745
 746         // user preferences are checked on every login, not here
 747
 748         function initialize_user($uid) {
 749
 750                 $pdo = DB::pdo();
 751
 752                 $sth = $pdo->prepare("insert into ttrss_feeds (owner_uid,title,feed_url)
 753                         values (?, 'Tiny Tiny RSS: Forum',
 754                                 'http://tt-rss.org/forum/rss.php')");
 755                 $sth->execute([$uid]);
 756         }
 757
 758         function logout_user() {
 759                 @session_destroy();
 760                 if (isset($_COOKIE[session_name()])) {
 761                    setcookie(session_name(), '', time()-42000, '/');
 762                 }
 763                 session_commit();
 764         }
 765
 766         function validate_csrf($csrf_token) {
 767                 return $csrf_token == $_SESSION['csrf_token'];
 768         }
 769
 770         function load_user_plugins($owner_uid, $pluginhost = false) {
 771
 772                 if (!$pluginhost) $pluginhost = PluginHost::getInstance();
 773
 774                 if ($owner_uid && SCHEMA_VERSION >= 100) {
 775                         $plugins = get_pref("_ENABLED_PLUGINS", $owner_uid);
 776
 777                         $pluginhost->load($plugins, PluginHost::KIND_USER, $owner_uid);
 778
 779                         if (get_schema_version() > 100) {
 780                                 $pluginhost->load_data();
 781                         }
 782                 }
 783         }
 784
 785         function login_sequence() {
 786                 $pdo = Db::pdo();
 787
 788                 if (SINGLE_USER_MODE) {
 789                         @session_start();
 790                         authenticate_user("admin", null);
 791                         startup_gettext();
 792                         load_user_plugins($_SESSION["uid"]);
 793                 } else {
 794                         if (!validate_session()) $_SESSION["uid"] = false;
 795
 796                         if (!$_SESSION["uid"]) {
 797
 798                                 if (AUTH_AUTO_LOGIN && authenticate_user(null, null)) {
 799                                         $_SESSION["ref_schema_version"] = get_schema_version(true);
 800                                 } else {
 801                                          authenticate_user(null, null, true);
 802                                 }
 803
 804                                 if (!$_SESSION["uid"]) {
 805                                         logout_user();
 806
 807                                         render_login_form();
 808                                         exit;
 809                                 }
 810
 811                         } else {
 812                                 /* bump login timestamp */
 813                                 $sth = $pdo->prepare("UPDATE ttrss_users SET last_login = NOW() WHERE id = ?");
 814                                 $sth->execute([$_SESSION['uid']]);
 815
 816                                 $_SESSION["last_login_update"] = time();
 817                         }
 818
 819                         if ($_SESSION["uid"]) {
 820                                 startup_gettext();
 821                                 load_user_plugins($_SESSION["uid"]);
 822
 823                                 /* cleanup ccache */
 824
 825                                 $sth = $pdo->prepare("DELETE FROM ttrss_counters_cache WHERE owner_uid = ?
 826                                         AND
 827                                                 (SELECT COUNT(id) FROM ttrss_feeds WHERE
 828                                                         ttrss_feeds.id = feed_id) = 0");
 829
 830                                 $sth->execute([$_SESSION['uid']]);
 831
 832                                 $sth = $pdo->prepare("DELETE FROM ttrss_cat_counters_cache WHERE owner_uid = ?
 833                                         AND
 834                                                 (SELECT COUNT(id) FROM ttrss_feed_categories WHERE
 835                                                         ttrss_feed_categories.id = feed_id) = 0");
 836
 837                                 $sth->execute([$_SESSION['uid']]);
 838                         }
 839
 840                 }
 841         }
 842
 843         function truncate_string($str, $max_len, $suffix = '&hellip;') {
 844                 if (mb_strlen($str, "utf-8") > $max_len) {
 845                         return mb_substr($str, 0, $max_len, "utf-8") . $suffix;
 846                 } else {
 847                         return $str;
 848                 }
 849         }
 850
 851         // is not utf8 clean
 852         function truncate_middle($str, $max_len, $suffix = '&hellip;') {
 853                 if (strlen($str) > $max_len) {
 854                         return substr_replace($str, $suffix, $max_len / 2, mb_strlen($str) - $max_len);
 855                 } else {
 856                         return $str;
 857                 }
 858         }
 859
 860         function convert_timestamp($timestamp, $source_tz, $dest_tz) {
 861
 862                 try {
 863                         $source_tz = new DateTimeZone($source_tz);
 864                 } catch (Exception $e) {
 865                         $source_tz = new DateTimeZone('UTC');
 866                 }
 867
 868                 try {
 869                         $dest_tz = new DateTimeZone($dest_tz);
 870                 } catch (Exception $e) {
 871                         $dest_tz = new DateTimeZone('UTC');
 872                 }
 873
 874                 $dt = new DateTime(date('Y-m-d H:i:s', $timestamp), $source_tz);
 875                 return $dt->format('U') + $dest_tz->getOffset($dt);
 876         }
 877
 878         function make_local_datetime($timestamp, $long, $owner_uid = false,
 879                                         $no_smart_dt = false, $eta_min = false) {
 880
 881                 if (!$owner_uid) $owner_uid = $_SESSION['uid'];
 882                 if (!$timestamp) $timestamp = '1970-01-01 0:00';
 883
 884                 global $utc_tz;
 885                 global $user_tz;
 886
 887                 if (!$utc_tz) $utc_tz = new DateTimeZone('UTC');
 888
 889                 $timestamp = substr($timestamp, 0, 19);
 890
 891                 # We store date in UTC internally
 892                 $dt = new DateTime($timestamp, $utc_tz);
 893
 894                 $user_tz_string = get_pref('USER_TIMEZONE', $owner_uid);
 895
 896                 if ($user_tz_string != 'Automatic') {
 897
 898                         try {
 899                                 if (!$user_tz) $user_tz = new DateTimeZone($user_tz_string);
 900                         } catch (Exception $e) {
 901                                 $user_tz = $utc_tz;
 902                         }
 903
 904                         $tz_offset = $user_tz->getOffset($dt);
 905                 } else {
 906                         $tz_offset = (int) -$_SESSION["clientTzOffset"];
 907                 }
 908
 909                 $user_timestamp = $dt->format('U') + $tz_offset;
 910
 911                 if (!$no_smart_dt) {
 912                         return smart_date_time($user_timestamp,
 913                                 $tz_offset, $owner_uid, $eta_min);
 914                 } else {
 915                         if ($long)
 916                                 $format = get_pref('LONG_DATE_FORMAT', $owner_uid);
 917                         else
 918                                 $format = get_pref('SHORT_DATE_FORMAT', $owner_uid);
 919
 920                         return date($format, $user_timestamp);
 921                 }
 922         }
 923
 924         function smart_date_time($timestamp, $tz_offset = 0, $owner_uid = false, $eta_min = false) {
 925                 if (!$owner_uid) $owner_uid = $_SESSION['uid'];
 926
 927                 if ($eta_min && time() + $tz_offset - $timestamp < 3600) {
 928                         return T_sprintf("%d min", date("i", time() + $tz_offset - $timestamp));
 929                 } else if (date("Y.m.d", $timestamp) == date("Y.m.d", time() + $tz_offset)) {
 930                         return date("G:i", $timestamp);
 931                 } else if (date("Y", $timestamp) == date("Y", time() + $tz_offset)) {
 932                         $format = get_pref('SHORT_DATE_FORMAT', $owner_uid);
 933                         return date($format, $timestamp);
 934                 } else {
 935                         $format = get_pref('LONG_DATE_FORMAT', $owner_uid);
 936                         return date($format, $timestamp);
 937                 }
 938         }
 939
 940         function sql_bool_to_bool($s) {
 941                 return $s && ($s !== "f" && $s !== "false"); //no-op for PDO, backwards compat for legacy layer
 942         }
 943
 944         function bool_to_sql_bool($s) {
 945                 return $s ? 1 : 0;
 946         }
 947
 948         // Session caching removed due to causing wrong redirects to upgrade
 949         // script when get_schema_version() is called on an obsolete session
 950         // created on a previous schema version.
 951         function get_schema_version($nocache = false) {
 952                 global $schema_version;
 953
 954                 $pdo = DB::pdo();
 955
 956                 if (!$schema_version && !$nocache) {
 957                         $row = $pdo->query("SELECT schema_version FROM ttrss_version")->fetch();
 958                         $version = $row["schema_version"];
 959                         $schema_version = $version;
 960                         return $version;
 961                 } else {
 962                         return $schema_version;
 963                 }
 964         }
 965
 966         function sanity_check() {
 967                 require_once 'errors.php';
 968                 global $ERRORS;
 969
 970                 $error_code = 0;
 971                 $schema_version = get_schema_version(true);
 972
 973                 if ($schema_version != SCHEMA_VERSION) {
 974                         $error_code = 5;
 975                 }
 976
 977                 return array("code" => $error_code, "message" => $ERRORS[$error_code]);
 978         }
 979
 980         function file_is_locked($filename) {
 981                 if (file_exists(LOCK_DIRECTORY . "/$filename")) {
 982                         if (function_exists('flock')) {
 983                                 $fp = @fopen(LOCK_DIRECTORY . "/$filename", "r");
 984                                 if ($fp) {
 985                                         if (flock($fp, LOCK_EX | LOCK_NB)) {
 986                                                 flock($fp, LOCK_UN);
 987                                                 fclose($fp);
 988                                                 return false;
 989                                         }
 990                                         fclose($fp);
 991                                         return true;
 992                                 } else {
 993                                         return false;
 994                                 }
 995                         }
 996                         return true; // consider the file always locked and skip the test
 997                 } else {
 998                         return false;
 999                 }
1000         }
1001
1002
1003         function make_lockfile($filename) {
1004                 $fp = fopen(LOCK_DIRECTORY . "/$filename", "w");
1005
1006                 if ($fp && flock($fp, LOCK_EX | LOCK_NB)) {
1007                         $stat_h = fstat($fp);
1008                         $stat_f = stat(LOCK_DIRECTORY . "/$filename");
1009
1010                         if (strtoupper(substr(PHP_OS, 0, 3)) !== 'WIN') {
1011                                 if ($stat_h["ino"] != $stat_f["ino"] ||
1012                                                 $stat_h["dev"] != $stat_f["dev"]) {
1013
1014                                         return false;
1015                                 }
1016                         }
1017
1018                         if (function_exists('posix_getpid')) {
1019                                 fwrite($fp, posix_getpid() . "\n");
1020                         }
1021                         return $fp;
1022                 } else {
1023                         return false;
1024                 }
1025         }
1026
1027         function make_stampfile($filename) {
1028                 $fp = fopen(LOCK_DIRECTORY . "/$filename", "w");
1029
1030                 if (flock($fp, LOCK_EX | LOCK_NB)) {
1031                         fwrite($fp, time() . "\n");
1032                         flock($fp, LOCK_UN);
1033                         fclose($fp);
1034                         return true;
1035                 } else {
1036                         return false;
1037                 }
1038         }
1039
1040         function sql_random_function() {
1041                 if (DB_TYPE == "mysql") {
1042                         return "RAND()";
1043                 } else {
1044                         return "RANDOM()";
1045                 }
1046         }
1047
1048         function getFeedUnread($feed, $is_cat = false) {
1049                 return Feeds::getFeedArticles($feed, $is_cat, true, $_SESSION["uid"]);
1050         }
1051
1052         function checkbox_to_sql_bool($val) {
1053                 return ($val == "on") ? 1 : 0;
1054         }
1055
1056         function uniqid_short() {
1057                 return uniqid(base_convert(rand(), 10, 36));
1058         }
1059
1060         function make_init_params() {
1061                 $params = array();
1062
1063                 foreach (array("ON_CATCHUP_SHOW_NEXT_FEED", "HIDE_READ_FEEDS",
1064                                          "ENABLE_FEED_CATS", "FEEDS_SORT_BY_UNREAD", "CONFIRM_FEED_CATCHUP",
1065                                          "CDM_AUTO_CATCHUP", "FRESH_ARTICLE_MAX_AGE",
1066                                          "HIDE_READ_SHOWS_SPECIAL", "COMBINED_DISPLAY_MODE") as $param) {
1067
1068                         $params[strtolower($param)] = (int) get_pref($param);
1069                 }
1070
1071                 $params["icons_url"] = ICONS_URL;
1072                 $params["cookie_lifetime"] = SESSION_COOKIE_LIFETIME;
1073                 $params["default_view_mode"] = get_pref("_DEFAULT_VIEW_MODE");
1074                 $params["default_view_limit"] = (int) get_pref("_DEFAULT_VIEW_LIMIT");
1075                 $params["default_view_order_by"] = get_pref("_DEFAULT_VIEW_ORDER_BY");
1076                 $params["bw_limit"] = (int) $_SESSION["bw_limit"];
1077                 $params["is_default_pw"] = Pref_Prefs::isdefaultpassword();
1078                 $params["label_base_index"] = (int) LABEL_BASE_INDEX;
1079
1080                 $theme = get_pref( "USER_CSS_THEME", false, false);
1081                 $params["theme"] = theme_valid("$theme") ? $theme : "";
1082
1083                 $params["plugins"] = implode(", ", PluginHost::getInstance()->get_plugin_names());
1084
1085                 $params["php_platform"] = PHP_OS;
1086                 $params["php_version"] = PHP_VERSION;
1087
1088                 $params["sanity_checksum"] = sha1(file_get_contents("include/sanity_check.php"));
1089
1090                 $pdo = Db::pdo();
1091
1092                 $sth = $pdo->prepare("SELECT MAX(id) AS mid, COUNT(*) AS nf FROM
1093                                 ttrss_feeds WHERE owner_uid = ?");
1094                 $sth->execute([$_SESSION['uid']]);
1095                 $row = $sth->fetch();
1096
1097                 $max_feed_id = $row["mid"];
1098                 $num_feeds = $row["nf"];
1099
1100                 $params["max_feed_id"] = (int) $max_feed_id;
1101                 $params["num_feeds"] = (int) $num_feeds;
1102
1103                 $params["hotkeys"] = get_hotkeys_map();
1104
1105                 $params["csrf_token"] = $_SESSION["csrf_token"];
1106                 $params["widescreen"] = (int) $_COOKIE["ttrss_widescreen"];
1107
1108                 $params['simple_update'] = defined('SIMPLE_UPDATE_MODE') && SIMPLE_UPDATE_MODE;
1109
1110                 $params["icon_alert"] = base64_img("images/alert.png");
1111                 $params["icon_information"] = base64_img("images/information.png");
1112                 $params["icon_cross"] = base64_img("images/cross.png");
1113                 $params["icon_indicator_white"] = base64_img("images/indicator_white.gif");
1114
1115                 $params["labels"] = Labels::get_all_labels($_SESSION["uid"]);
1116
1117                 return $params;
1118         }
1119
1120         function get_hotkeys_info() {
1121                 $hotkeys = array(
1122                         __("Navigation") => array(
1123                                 "next_feed" => __("Open next feed"),
1124                                 "prev_feed" => __("Open previous feed"),
1125                                 "next_article" => __("Open next article"),
1126                                 "prev_article" => __("Open previous article"),
1127                                 "next_article_noscroll" => __("Open next article (don't scroll long articles)"),
1128                                 "prev_article_noscroll" => __("Open previous article (don't scroll long articles)"),
1129                                 "next_article_noexpand" => __("Move to next article (don't expand or mark read)"),
1130                                 "prev_article_noexpand" => __("Move to previous article (don't expand or mark read)"),
1131                                 "search_dialog" => __("Show search dialog")),
1132                         __("Article") => array(
1133                                 "toggle_mark" => __("Toggle starred"),
1134                                 "toggle_publ" => __("Toggle published"),
1135                                 "toggle_unread" => __("Toggle unread"),
1136                                 "edit_tags" => __("Edit tags"),
1137                                 "open_in_new_window" => __("Open in new window"),
1138                                 "catchup_below" => __("Mark below as read"),
1139                                 "catchup_above" => __("Mark above as read"),
1140                                 "article_scroll_down" => __("Scroll down"),
1141                                 "article_scroll_up" => __("Scroll up"),
1142                                 "select_article_cursor" => __("Select article under cursor"),
1143                                 "email_article" => __("Email article"),
1144                                 "close_article" => __("Close/collapse article"),
1145                                 "toggle_expand" => __("Toggle article expansion (combined mode)"),
1146                                 "toggle_widescreen" => __("Toggle widescreen mode"),
1147                                 "toggle_embed_original" => __("Toggle embed original")),
1148                         __("Article selection") => array(
1149                                 "select_all" => __("Select all articles"),
1150                                 "select_unread" => __("Select unread"),
1151                                 "select_marked" => __("Select starred"),
1152                                 "select_published" => __("Select published"),
1153                                 "select_invert" => __("Invert selection"),
1154                                 "select_none" => __("Deselect everything")),
1155                         __("Feed") => array(
1156                                 "feed_refresh" => __("Refresh current feed"),
1157                                 "feed_unhide_read" => __("Un/hide read feeds"),
1158                                 "feed_subscribe" => __("Subscribe to feed"),
1159                                 "feed_edit" => __("Edit feed"),
1160                                 "feed_catchup" => __("Mark as read"),
1161                                 "feed_reverse" => __("Reverse headlines"),
1162                                 "feed_toggle_vgroup" => __("Toggle headline grouping"),
1163                                 "feed_debug_update" => __("Debug feed update"),
1164                                 "feed_debug_viewfeed" => __("Debug viewfeed()"),
1165                                 "catchup_all" => __("Mark all feeds as read"),
1166                                 "cat_toggle_collapse" => __("Un/collapse current category"),
1167                                 "toggle_combined_mode" => __("Toggle combined mode")),
1168                         __("Go to") => array(
1169                                 "goto_all" => __("All articles"),
1170                                 "goto_fresh" => __("Fresh"),
1171                                 "goto_marked" => __("Starred"),
1172                                 "goto_published" => __("Published"),
1173                                 "goto_tagcloud" => __("Tag cloud"),
1174                                 "goto_prefs" => __("Preferences")),
1175                         __("Other") => array(
1176                                 "create_label" => __("Create label"),
1177                                 "create_filter" => __("Create filter"),
1178                                 "collapse_sidebar" => __("Un/collapse sidebar"),
1179                                 "help_dialog" => __("Show help dialog"))
1180                 );
1181
1182                 foreach (PluginHost::getInstance()->get_hooks(PluginHost::HOOK_HOTKEY_INFO) as $plugin) {
1183                         $hotkeys = $plugin->hook_hotkey_info($hotkeys);
1184                 }
1185
1186                 return $hotkeys;
1187         }
1188
1189         function get_hotkeys_map() {
1190                 $hotkeys = array(
1191         //                      "navigation" => array(
1192                         "k" => "next_feed",
1193                         "j" => "prev_feed",
1194                         "n" => "next_article",
1195                         "p" => "prev_article",
1196                         "(38)|up" => "prev_article",
1197                         "(40)|down" => "next_article",
1198         //                              "^(38)|Ctrl-up" => "prev_article_noscroll",
1199         //                              "^(40)|Ctrl-down" => "next_article_noscroll",
1200                         "(191)|/" => "search_dialog",
1201         //                      "article" => array(
1202                         "s" => "toggle_mark",
1203                         "*s" => "toggle_publ",
1204                         "u" => "toggle_unread",
1205                         "*t" => "edit_tags",
1206                         "o" => "open_in_new_window",
1207                         "c p" => "catchup_below",
1208                         "c n" => "catchup_above",
1209                         "*n" => "article_scroll_down",
1210                         "*p" => "article_scroll_up",
1211                         "*(38)|Shift+up" => "article_scroll_up",
1212                         "*(40)|Shift+down" => "article_scroll_down",
1213                         "a *w" => "toggle_widescreen",
1214                         "a e" => "toggle_embed_original",
1215                         "e" => "email_article",
1216                         "a q" => "close_article",
1217         //                      "article_selection" => array(
1218                         "a a" => "select_all",
1219                         "a u" => "select_unread",
1220                         "a *u" => "select_marked",
1221                         "a p" => "select_published",
1222                         "a i" => "select_invert",
1223                         "a n" => "select_none",
1224         //                      "feed" => array(
1225                         "f r" => "feed_refresh",
1226                         "f a" => "feed_unhide_read",
1227                         "f s" => "feed_subscribe",
1228                         "f e" => "feed_edit",
1229                         "f q" => "feed_catchup",
1230                         "f x" => "feed_reverse",
1231                         "f g" => "feed_toggle_vgroup",
1232                         "f *d" => "feed_debug_update",
1233                         "f *g" => "feed_debug_viewfeed",
1234                         "f *c" => "toggle_combined_mode",
1235                         "*q" => "catchup_all",
1236                         "x" => "cat_toggle_collapse",
1237         //                      "goto" => array(
1238                         "g a" => "goto_all",
1239                         "g f" => "goto_fresh",
1240                         "g s" => "goto_marked",
1241                         "g p" => "goto_published",
1242                         "g t" => "goto_tagcloud",
1243                         "g *p" => "goto_prefs",
1244         //                      "other" => array(
1245                         "(9)|Tab" => "select_article_cursor", // tab
1246                         "c l" => "create_label",
1247                         "c f" => "create_filter",
1248                         "c s" => "collapse_sidebar",
1249                         "^(191)|Ctrl+/" => "help_dialog",
1250                 );
1251
1252                 if (get_pref('COMBINED_DISPLAY_MODE')) {
1253                         $hotkeys["^(38)|Ctrl-up"] = "prev_article_noscroll";
1254                         $hotkeys["^(40)|Ctrl-down"] = "next_article_noscroll";
1255                 }
1256
1257                 foreach (PluginHost::getInstance()->get_hooks(PluginHost::HOOK_HOTKEY_MAP) as $plugin) {
1258                         $hotkeys = $plugin->hook_hotkey_map($hotkeys);
1259                 }
1260
1261                 $prefixes = array();
1262
1263                 foreach (array_keys($hotkeys) as $hotkey) {
1264                         $pair = explode(" ", $hotkey, 2);
1265
1266                         if (count($pair) > 1 && !in_array($pair[0], $prefixes)) {
1267                                 array_push($prefixes, $pair[0]);
1268                         }
1269                 }
1270
1271                 return array($prefixes, $hotkeys);
1272         }
1273
1274         function check_for_update() {
1275                 if (defined("GIT_VERSION_TIMESTAMP")) {
1276                         $content = @fetch_file_contents(array("url" => "http://tt-rss.org/version.json", "timeout" => 5));
1277
1278                         if ($content) {
1279                                 $content = json_decode($content, true);
1280
1281                                 if ($content && isset($content["changeset"])) {
1282                                         if ((int)GIT_VERSION_TIMESTAMP < (int)$content["changeset"]["timestamp"] &&
1283                                                 GIT_VERSION_HEAD != $content["changeset"]["id"]) {
1284
1285                                                 return $content["changeset"]["id"];
1286                                         }
1287                                 }
1288                         }
1289                 }
1290
1291                 return "";
1292         }
1293
1294         function make_runtime_info($disable_update_check = false) {
1295                 $data = array();
1296
1297                 $pdo = Db::pdo();
1298
1299                 $sth = $pdo->prepare("SELECT MAX(id) AS mid, COUNT(*) AS nf FROM
1300                                 ttrss_feeds WHERE owner_uid = ?");
1301                 $sth->execute([$_SESSION['uid']]);
1302                 $row = $sth->fetch();
1303
1304                 $max_feed_id = $row['mid'];
1305                 $num_feeds = $row['nf'];
1306
1307                 $data["max_feed_id"] = (int) $max_feed_id;
1308                 $data["num_feeds"] = (int) $num_feeds;
1309
1310                 $data['last_article_id'] = Article::getLastArticleId();
1311
1312                 $data['dep_ts'] = calculate_dep_timestamp();
1313                 $data['reload_on_ts_change'] = !defined('_NO_RELOAD_ON_TS_CHANGE');
1314
1315                 $data["labels"] = Labels::get_all_labels($_SESSION["uid"]);
1316
1317                 if (CHECK_FOR_UPDATES && !$disable_update_check && $_SESSION["last_version_check"] + 86400 + rand(-1000, 1000) < time()) {
1318                         $update_result = @check_for_update();
1319
1320                         $data["update_result"] = $update_result;
1321
1322                         $_SESSION["last_version_check"] = time();
1323                 }
1324
1325                 if (file_exists(LOCK_DIRECTORY . "/update_daemon.lock")) {
1326
1327                         $data['daemon_is_running'] = (int) file_is_locked("update_daemon.lock");
1328
1329                         if (time() - $_SESSION["daemon_stamp_check"] > 30) {
1330
1331                                 $stamp = (int) @file_get_contents(LOCK_DIRECTORY . "/update_daemon.stamp");
1332
1333                                 if ($stamp) {
1334                                         $stamp_delta = time() - $stamp;
1335
1336                                         if ($stamp_delta > 1800) {
1337                                                 $stamp_check = 0;
1338                                         } else {
1339                                                 $stamp_check = 1;
1340                                                 $_SESSION["daemon_stamp_check"] = time();
1341                                         }
1342
1343                                         $data['daemon_stamp_ok'] = $stamp_check;
1344
1345                                         $stamp_fmt = date("Y.m.d, G:i", $stamp);
1346
1347                                         $data['daemon_stamp'] = $stamp_fmt;
1348                                 }
1349                         }
1350                 }
1351
1352                 return $data;
1353         }
1354
1355         function search_to_sql($search, $search_language) {
1356
1357                 $keywords = str_getcsv(trim($search), " ");
1358                 $query_keywords = array();
1359                 $search_words = array();
1360                 $search_query_leftover = array();
1361
1362                 $pdo = Db::pdo();
1363
1364                 if ($search_language)
1365                         $search_language = $pdo->quote(mb_strtolower($search_language));
1366                 else
1367                         $search_language = $pdo->quote("english");
1368
1369                 foreach ($keywords as $k) {
1370                         if (strpos($k, "-") === 0) {
1371                                 $k = substr($k, 1);
1372                                 $not = "NOT";
1373                         } else {
1374                                 $not = "";
1375                         }
1376
1377                         $commandpair = explode(":", mb_strtolower($k), 2);
1378
1379                         switch ($commandpair[0]) {
1380                                 case "title":
1381                                         if ($commandpair[1]) {
1382                                                 array_push($query_keywords, "($not (LOWER(ttrss_entries.title) LIKE ".
1383                                                         $pdo->quote('%' . mb_strtolower($commandpair[1]) . '%') ."))");
1384                                         } else {
1385                                                 array_push($query_keywords, "(UPPER(ttrss_entries.title) $not LIKE UPPER('%$k%')
1386                                                                 OR UPPER(ttrss_entries.content) $not LIKE UPPER(".$pdo->quote("%$k%")."))");
1387                                                 array_push($search_words, $k);
1388                                         }
1389                                         break;
1390                                 case "author":
1391                                         if ($commandpair[1]) {
1392                                                 array_push($query_keywords, "($not (LOWER(author) LIKE ".
1393                                                         $pdo->quote('%' . mb_strtolower($commandpair[1]) . '%')."))");
1394                                         } else {
1395                                                 array_push($query_keywords, "(UPPER(ttrss_entries.title) $not LIKE UPPER('%$k%')
1396                                                                 OR UPPER(ttrss_entries.content) $not LIKE UPPER(".$pdo->quote("%$k%")."))");
1397                                                 array_push($search_words, $k);
1398                                         }
1399                                         break;
1400                                 case "note":
1401                                         if ($commandpair[1]) {
1402                                                 if ($commandpair[1] == "true")
1403                                                         array_push($query_keywords, "($not (note IS NOT NULL AND note != ''))");
1404                                                 else if ($commandpair[1] == "false")
1405                                                         array_push($query_keywords, "($not (note IS NULL OR note = ''))");
1406                                                 else
1407                                                         array_push($query_keywords, "($not (LOWER(note) LIKE ".
1408                                                                 $pdo->quote('%' . mb_strtolower($commandpair[1]) . '%')."))");
1409                                         } else {
1410                                                 array_push($query_keywords, "(UPPER(ttrss_entries.title) $not LIKE UPPER(".$pdo->quote("%$k%").")
1411                                                                 OR UPPER(ttrss_entries.content) $not LIKE UPPER(".$pdo->quote("%$k%")."))");
1412                                                 if (!$not) array_push($search_words, $k);
1413                                         }
1414                                         break;
1415                                 case "star":
1416
1417                                         if ($commandpair[1]) {
1418                                                 if ($commandpair[1] == "true")
1419                                                         array_push($query_keywords, "($not (marked = true))");
1420                                                 else
1421                                                         array_push($query_keywords, "($not (marked = false))");
1422                                         } else {
1423                                                 array_push($query_keywords, "(UPPER(ttrss_entries.title) $not LIKE UPPER(".$pdo->quote("%$k%").")
1424                                                                 OR UPPER(ttrss_entries.content) $not LIKE UPPER(".$pdo->quote("%$k%")."))");
1425                                                 if (!$not) array_push($search_words, $k);
1426                                         }
1427                                         break;
1428                                 case "pub":
1429                                         if ($commandpair[1]) {
1430                                                 if ($commandpair[1] == "true")
1431                                                         array_push($query_keywords, "($not (published = true))");
1432                                                 else
1433                                                         array_push($query_keywords, "($not (published = false))");
1434
1435                                         } else {
1436                                                 array_push($query_keywords, "(UPPER(ttrss_entries.title) $not LIKE UPPER('%$k%')
1437                                                                 OR UPPER(ttrss_entries.content) $not LIKE UPPER(".$pdo->quote("%$k%")."))");
1438                                                 if (!$not) array_push($search_words, $k);
1439                                         }
1440                                         break;
1441                                 case "unread":
1442                                         if ($commandpair[1]) {
1443                                                 if ($commandpair[1] == "true")
1444                                                         array_push($query_keywords, "($not (unread = true))");
1445                                                 else
1446                                                         array_push($query_keywords, "($not (unread = false))");
1447
1448                                         } else {
1449                                                 array_push($query_keywords, "(UPPER(ttrss_entries.title) $not LIKE UPPER(".$pdo->quote("%$k%").")
1450                                                                 OR UPPER(ttrss_entries.content) $not LIKE UPPER(".$pdo->quote("%$k%")."))");
1451                                                 if (!$not) array_push($search_words, $k);
1452                                         }
1453                                         break;
1454                                 default:
1455                                         if (strpos($k, "@") === 0) {
1456
1457                                                 $user_tz_string = get_pref('USER_TIMEZONE', $_SESSION['uid']);
1458                                                 $orig_ts = strtotime(substr($k, 1));
1459                                                 $k = date("Y-m-d", convert_timestamp($orig_ts, $user_tz_string, 'UTC'));
1460
1461                                                 //$k = date("Y-m-d", strtotime(substr($k, 1)));
1462
1463                                                 array_push($query_keywords, "(".SUBSTRING_FOR_DATE."(updated,1,LENGTH('$k')) $not = '$k')");
1464                                         } else {
1465
1466                                                 if (DB_TYPE == "pgsql") {
1467                                                         $k = mb_strtolower($k);
1468                                                         array_push($search_query_leftover, $not ? "!$k" : $k);
1469                                                 } else {
1470                                                         array_push($query_keywords, "(UPPER(ttrss_entries.title) $not LIKE UPPER(".$pdo->quote("%$k%").")
1471                                                                 OR UPPER(ttrss_entries.content) $not LIKE UPPER(".$pdo->quote("%$k%")."))");
1472                                                 }
1473
1474                                                 if (!$not) array_push($search_words, $k);
1475                                         }
1476                         }
1477                 }
1478
1479                 if (count($search_query_leftover) > 0) {
1480                         $search_query_leftover = $pdo->quote(implode(" & ", $search_query_leftover));
1481
1482                         if (DB_TYPE == "pgsql") {
1483                                 array_push($query_keywords,
1484                                         "(tsvector_combined @@ to_tsquery($search_language, $search_query_leftover))");
1485                         }
1486
1487                 }
1488
1489                 $search_query_part = implode("AND", $query_keywords);
1490
1491                 return array($search_query_part, $search_words);
1492         }
1493
1494         function iframe_whitelisted($entry) {
1495                 $whitelist = array("youtube.com", "youtu.be", "vimeo.com", "player.vimeo.com");
1496
1497                 @$src = parse_url($entry->getAttribute("src"), PHP_URL_HOST);
1498
1499                 if ($src) {
1500                         foreach ($whitelist as $w) {
1501                                 if ($src == $w || $src == "www.$w")
1502                                         return true;
1503                         }
1504                 }
1505
1506                 return false;
1507         }
1508
1509         // check for locally cached (media) URLs and rewrite to local versions
1510         // this is called separately after sanitize() and plugin render article hooks to allow
1511         // plugins work on original source URLs used before caching
1512
1513         function rewrite_cached_urls($str) {
1514                 $charset_hack = '<head>
1515                                 <meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
1516                         </head>';
1517
1518                 $res = trim($str); if (!$res) return '';
1519
1520                 $doc = new DOMDocument();
1521                 $doc->loadHTML($charset_hack . $res);
1522                 $xpath = new DOMXPath($doc);
1523
1524                 $entries = $xpath->query('(//img[@src]|//video[@poster]|//video/source[@src]|//audio/source[@src])');
1525
1526                 $need_saving = false;
1527
1528                 foreach ($entries as $entry) {
1529
1530                         if ($entry->hasAttribute('src') || $entry->hasAttribute('poster')) {
1531
1532                                 // should be already absolutized because this is called after sanitize()
1533                                 $src = $entry->hasAttribute('poster') ? $entry->getAttribute('poster') : $entry->getAttribute('src');
1534                                 $cached_filename = CACHE_DIR . '/images/' . sha1($src);
1535
1536                                 if (file_exists($cached_filename)) {
1537
1538                                         // this is strictly cosmetic
1539                                         if ($entry->tagName == 'img') {
1540                                                 $suffix = ".png";
1541                                         } else if ($entry->parentNode && $entry->parentNode->tagName == "video") {
1542                                                 $suffix = ".mp4";
1543                                         } else if ($entry->parentNode && $entry->parentNode->tagName == "audio") {
1544                                                 $suffix = ".ogg";
1545                                         } else {
1546                                                 $suffix = "";
1547                                         }
1548
1549                                         $src = get_self_url_prefix() . '/public.php?op=cached_url&hash=' . sha1($src) . $suffix;
1550
1551                                         if ($entry->hasAttribute('poster'))
1552                                                 $entry->setAttribute('poster', $src);
1553                                         else
1554                                                 $entry->setAttribute('src', $src);
1555
1556                                         $need_saving = true;
1557                                 }
1558                         }
1559                 }
1560
1561                 if ($need_saving) {
1562                         $doc->removeChild($doc->firstChild); //remove doctype
1563                         $res = $doc->saveHTML();
1564                 }
1565
1566                 return $res;
1567         }
1568
1569         function sanitize($str, $force_remove_images = false, $owner = false, $site_url = false, $highlight_words = false, $article_id = false) {
1570                 if (!$owner) $owner = $_SESSION["uid"];
1571
1572                 $res = trim($str); if (!$res) return '';
1573
1574                 $charset_hack = '<head>
1575                                 <meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
1576                         </head>';
1577
1578                 $res = trim($res); if (!$res) return '';
1579
1580                 libxml_use_internal_errors(true);
1581
1582                 $doc = new DOMDocument();
1583                 $doc->loadHTML($charset_hack . $res);
1584                 $xpath = new DOMXPath($doc);
1585
1586                 $rewrite_base_url = $site_url ? $site_url : get_self_url_prefix();
1587
1588                 $entries = $xpath->query('(//a[@href]|//img[@src]|//video/source[@src]|//audio/source[@src])');
1589
1590                 foreach ($entries as $entry) {
1591
1592                         if ($entry->hasAttribute('href')) {
1593                                 $entry->setAttribute('href',
1594                                         rewrite_relative_url($rewrite_base_url, $entry->getAttribute('href')));
1595
1596                                 $entry->setAttribute('rel', 'noopener noreferrer');
1597                         }
1598
1599                         if ($entry->hasAttribute('src')) {
1600                                 $src = rewrite_relative_url($rewrite_base_url, $entry->getAttribute('src'));
1601
1602                                 // cache stuff has gone to rewrite_cached_urls()
1603
1604                                 $entry->setAttribute('src', $src);
1605                         }
1606
1607                         if ($entry->nodeName == 'img') {
1608                                 $entry->setAttribute('referrerpolicy', 'no-referrer');
1609
1610                                 $entry->removeAttribute('width');
1611                                 $entry->removeAttribute('height');
1612
1613                                 if ($entry->hasAttribute('src')) {
1614                                         $is_https_url = parse_url($entry->getAttribute('src'), PHP_URL_SCHEME) === 'https';
1615
1616                                         if (is_prefix_https() && !$is_https_url) {
1617
1618                                                 if ($entry->hasAttribute('srcset')) {
1619                                                         $entry->removeAttribute('srcset');
1620                                                 }
1621
1622                                                 if ($entry->hasAttribute('sizes')) {
1623                                                         $entry->removeAttribute('sizes');
1624                                                 }
1625                                         }
1626                                 }
1627                         }
1628
1629                         if ($entry->hasAttribute('src') &&
1630                                         ($owner && get_pref("STRIP_IMAGES", $owner)) || $force_remove_images || $_SESSION["bw_limit"]) {
1631
1632                                 $p = $doc->createElement('p');
1633
1634                                 $a = $doc->createElement('a');
1635                                 $a->setAttribute('href', $entry->getAttribute('src'));
1636
1637                                 $a->appendChild(new DOMText($entry->getAttribute('src')));
1638                                 $a->setAttribute('target', '_blank');
1639                                 $a->setAttribute('rel', 'noopener noreferrer');
1640
1641                                 $p->appendChild($a);
1642
1643                                 if ($entry->nodeName == 'source') {
1644
1645                                         if ($entry->parentNode && $entry->parentNode->parentNode)
1646                                                 $entry->parentNode->parentNode->replaceChild($p, $entry->parentNode);
1647
1648                                 } else if ($entry->nodeName == 'img') {
1649
1650                                         if ($entry->parentNode)
1651                                                 $entry->parentNode->replaceChild($p, $entry);
1652
1653                                 }
1654                         }
1655
1656                         if (strtolower($entry->nodeName) == "a") {
1657                                 $entry->setAttribute("target", "_blank");
1658                                 $entry->setAttribute("rel", "noopener noreferrer");
1659                         }
1660                 }
1661
1662                 $entries = $xpath->query('//iframe');
1663                 foreach ($entries as $entry) {
1664                         if (!iframe_whitelisted($entry)) {
1665                                 $entry->setAttribute('sandbox', 'allow-scripts');
1666                         } else {
1667                                 if (is_prefix_https()) {
1668                                         $entry->setAttribute("src",
1669                                                 str_replace("http://", "https://",
1670                                                         $entry->getAttribute("src")));
1671                                 }
1672                         }
1673                 }
1674
1675                 $allowed_elements = array('a', 'abbr', 'address', 'acronym', 'audio', 'article', 'aside',
1676                         'b', 'bdi', 'bdo', 'big', 'blockquote', 'body', 'br',
1677                         'caption', 'cite', 'center', 'code', 'col', 'colgroup',
1678                         'data', 'dd', 'del', 'details', 'description', 'dfn', 'div', 'dl', 'font',
1679                         'dt', 'em', 'footer', 'figure', 'figcaption',
1680                         'h1', 'h2', 'h3', 'h4', 'h5', 'h6', 'header', 'hr', 'html', 'i',
1681                         'img', 'ins', 'kbd', 'li', 'main', 'mark', 'nav', 'noscript',
1682                         'ol', 'p', 'pre', 'q', 'ruby', 'rp', 'rt', 's', 'samp', 'section',
1683                         'small', 'source', 'span', 'strike', 'strong', 'sub', 'summary',
1684                         'sup', 'table', 'tbody', 'td', 'tfoot', 'th', 'thead', 'time',
1685                         'tr', 'track', 'tt', 'u', 'ul', 'var', 'wbr', 'video', 'xml:namespace' );
1686
1687                 if ($_SESSION['hasSandbox']) $allowed_elements[] = 'iframe';
1688
1689                 $disallowed_attributes = array('id', 'style', 'class');
1690
1691                 foreach (PluginHost::getInstance()->get_hooks(PluginHost::HOOK_SANITIZE) as $plugin) {
1692                         $retval = $plugin->hook_sanitize($doc, $site_url, $allowed_elements, $disallowed_attributes, $article_id);
1693                         if (is_array($retval)) {
1694                                 $doc = $retval[0];
1695                                 $allowed_elements = $retval[1];
1696                                 $disallowed_attributes = $retval[2];
1697                         } else {
1698                                 $doc = $retval;
1699                         }
1700                 }
1701
1702                 $doc->removeChild($doc->firstChild); //remove doctype
1703                 $doc = strip_harmful_tags($doc, $allowed_elements, $disallowed_attributes);
1704
1705                 if ($highlight_words) {
1706                         foreach ($highlight_words as $word) {
1707
1708                                 // http://stackoverflow.com/questions/4081372/highlight-keywords-in-a-paragraph
1709
1710                                 $elements = $xpath->query("//*/text()");
1711
1712                                 foreach ($elements as $child) {
1713
1714                                         $fragment = $doc->createDocumentFragment();
1715                                         $text = $child->textContent;
1716
1717                                         while (($pos = mb_stripos($text, $word)) !== false) {
1718                                                 $fragment->appendChild(new DomText(mb_substr($text, 0, $pos)));
1719                                                 $word = mb_substr($text, $pos, mb_strlen($word));
1720                                                 $highlight = $doc->createElement('span');
1721                                                 $highlight->appendChild(new DomText($word));
1722                                                 $highlight->setAttribute('class', 'highlight');
1723                                                 $fragment->appendChild($highlight);
1724                                                 $text = mb_substr($text, $pos + mb_strlen($word));
1725                                         }
1726
1727                                         if (!empty($text)) $fragment->appendChild(new DomText($text));
1728
1729                                         $child->parentNode->replaceChild($fragment, $child);
1730                                 }
1731                         }
1732                 }
1733
1734                 $res = $doc->saveHTML();
1735
1736                 /* strip everything outside of <body>...</body> */
1737
1738                 $res_frag = array();
1739                 if (preg_match('/<body>(.*)<\/body>/is', $res, $res_frag)) {
1740                         return $res_frag[1];
1741                 } else {
1742                         return $res;
1743                 }
1744         }
1745
1746         function strip_harmful_tags($doc, $allowed_elements, $disallowed_attributes) {
1747                 $xpath = new DOMXPath($doc);
1748                 $entries = $xpath->query('//*');
1749
1750                 foreach ($entries as $entry) {
1751                         if (!in_array($entry->nodeName, $allowed_elements)) {
1752                                 $entry->parentNode->removeChild($entry);
1753                         }
1754
1755                         if ($entry->hasAttributes()) {
1756                                 $attrs_to_remove = array();
1757
1758                                 foreach ($entry->attributes as $attr) {
1759
1760                                         if (strpos($attr->nodeName, 'on') === 0) {
1761                                                 array_push($attrs_to_remove, $attr);
1762                                         }
1763
1764                                         if ($attr->nodeName == 'href' && stripos($attr->value, 'javascript:') === 0) {
1765                                                 array_push($attrs_to_remove, $attr);
1766                                         }
1767
1768                                         if (in_array($attr->nodeName, $disallowed_attributes)) {
1769                                                 array_push($attrs_to_remove, $attr);
1770                                         }
1771                                 }
1772
1773                                 foreach ($attrs_to_remove as $attr) {
1774                                         $entry->removeAttributeNode($attr);
1775                                 }
1776                         }
1777                 }
1778
1779                 return $doc;
1780         }
1781
1782         function trim_array($array) {
1783                 $tmp = $array;
1784                 array_walk($tmp, 'trim');
1785                 return $tmp;
1786         }
1787
1788         function tag_is_valid($tag) {
1789                 if (!$tag || is_numeric($tag) || mb_strlen($tag) > 250)
1790                         return false;
1791
1792                 return true;
1793         }
1794
1795         function render_login_form() {
1796                 header('Cache-Control: public');
1797
1798                 require_once "login_form.php";
1799                 exit;
1800         }
1801
1802         function T_sprintf() {
1803                 $args = func_get_args();
1804                 return vsprintf(__(array_shift($args)), $args);
1805         }
1806
1807         function print_checkpoint($n, $s) {
1808                 $ts = microtime(true);
1809                 echo sprintf("<!-- CP[$n] %.4f seconds -->\n", $ts - $s);
1810                 return $ts;
1811         }
1812
1813         function sanitize_tag($tag) {
1814                 $tag = trim($tag);
1815
1816                 $tag = mb_strtolower($tag, 'utf-8');
1817
1818                 $tag = preg_replace('/[,\'\"\+\>\<]/', "", $tag);
1819
1820                 if (DB_TYPE == "mysql") {
1821                         $tag = preg_replace('/[\x{10000}-\x{10FFFF}]/u', "\xEF\xBF\xBD", $tag);
1822                 }
1823
1824                 return $tag;
1825         }
1826
1827         function is_server_https() {
1828                 return (!empty($_SERVER['HTTPS']) && ($_SERVER['HTTPS'] != 'off')) || $_SERVER['HTTP_X_FORWARDED_PROTO'] == 'https';
1829         }
1830
1831         function is_prefix_https() {
1832                 return parse_url(SELF_URL_PATH, PHP_URL_SCHEME) == 'https';
1833         }
1834
1835         // this returns SELF_URL_PATH sans ending slash
1836         function get_self_url_prefix() {
1837                 if (strrpos(SELF_URL_PATH, "/") === strlen(SELF_URL_PATH)-1) {
1838                         return substr(SELF_URL_PATH, 0, strlen(SELF_URL_PATH)-1);
1839                 } else {
1840                         return SELF_URL_PATH;
1841                 }
1842         }
1843
1844         function encrypt_password($pass, $salt = '', $mode2 = false) {
1845                 if ($salt && $mode2) {
1846                         return "MODE2:" . hash('sha256', $salt . $pass);
1847                 } else if ($salt) {
1848                         return "SHA1X:" . sha1("$salt:$pass");
1849                 } else {
1850                         return "SHA1:" . sha1($pass);
1851                 }
1852         } // function encrypt_password
1853
1854         function load_filters($feed_id, $owner_uid) {
1855                 $filters = array();
1856
1857                 $feed_id = (int) $feed_id;
1858                 $cat_id = (int)Feeds::getFeedCategory($feed_id);
1859
1860                 if ($cat_id == 0)
1861                         $null_cat_qpart = "cat_id IS NULL OR";
1862                 else
1863                         $null_cat_qpart = "";
1864
1865                 $pdo = Db::pdo();
1866
1867                 $sth = $pdo->prepare("SELECT * FROM ttrss_filters2 WHERE
1868                                 owner_uid = ? AND enabled = true ORDER BY order_id, title");
1869                 $sth->execute([$owner_uid]);
1870
1871                 $check_cats = array_merge(
1872                         Feeds::getParentCategories($cat_id, $owner_uid),
1873                         [$cat_id]);
1874
1875                 $check_cats_str = join(",", $check_cats);
1876                 $check_cats_fullids = array_map(function($a) { return "CAT:$a"; }, $check_cats);
1877
1878                 while ($line = $sth->fetch()) {
1879                         $filter_id = $line["id"];
1880
1881                         $match_any_rule = sql_bool_to_bool($line["match_any_rule"]);
1882
1883                         $sth2 = $pdo->prepare("SELECT
1884                                         r.reg_exp, r.inverse, r.feed_id, r.cat_id, r.cat_filter, r.match_on, t.name AS type_name
1885                                         FROM ttrss_filters2_rules AS r,
1886                                         ttrss_filter_types AS t
1887                                         WHERE
1888                                                 (match_on IS NOT NULL OR
1889                                                   (($null_cat_qpart (cat_id IS NULL AND cat_filter = false) OR cat_id IN ($check_cats_str)) AND
1890                                                   (feed_id IS NULL OR feed_id = ?))) AND
1891                                                 filter_type = t.id AND filter_id = ?");
1892                         $sth2->execute([$feed_id, $filter_id]);
1893
1894                         $rules = array();
1895                         $actions = array();
1896
1897                         while ($rule_line = $sth2->fetch()) {
1898         #                               print_r($rule_line);
1899
1900                                 if ($rule_line["match_on"]) {
1901                                         $match_on = json_decode($rule_line["match_on"], true);
1902
1903                                         if (in_array("0", $match_on) || in_array($feed_id, $match_on) || count(array_intersect($check_cats_fullids, $match_on)) > 0) {
1904
1905                                                 $rule = array();
1906                                                 $rule["reg_exp"] = $rule_line["reg_exp"];
1907                                                 $rule["type"] = $rule_line["type_name"];
1908                                                 $rule["inverse"] = sql_bool_to_bool($rule_line["inverse"]);
1909
1910                                                 array_push($rules, $rule);
1911                                         } else if (!$match_any_rule) {
1912                                                 // this filter contains a rule that doesn't match to this feed/category combination
1913                                                 // thus filter has to be rejected
1914
1915                                                 $rules = [];
1916                                                 break;
1917                                         }
1918
1919                                 } else {
1920
1921                                         $rule = array();
1922                                         $rule["reg_exp"] = $rule_line["reg_exp"];
1923                                         $rule["type"] = $rule_line["type_name"];
1924                                         $rule["inverse"] = sql_bool_to_bool($rule_line["inverse"]);
1925
1926                                         array_push($rules, $rule);
1927                                 }
1928                         }
1929
1930                         if (count($rules) > 0) {
1931                                 $sth2 = $pdo->prepare("SELECT a.action_param,t.name AS type_name
1932                                                 FROM ttrss_filters2_actions AS a,
1933                                                 ttrss_filter_actions AS t
1934                                                 WHERE
1935                                                         action_id = t.id AND filter_id = ?");
1936                                 $sth2->execute([$filter_id]);
1937
1938                                 while ($action_line = $sth2->fetch()) {
1939                                         #                               print_r($action_line);
1940
1941                                         $action = array();
1942                                         $action["type"] = $action_line["type_name"];
1943                                         $action["param"] = $action_line["action_param"];
1944
1945                                         array_push($actions, $action);
1946                                 }
1947                         }
1948
1949                         $filter = array();
1950                         $filter["match_any_rule"] = sql_bool_to_bool($line["match_any_rule"]);
1951                         $filter["inverse"] = sql_bool_to_bool($line["inverse"]);
1952                         $filter["rules"] = $rules;
1953                         $filter["actions"] = $actions;
1954
1955                         if (count($rules) > 0 && count($actions) > 0) {
1956                                 array_push($filters, $filter);
1957                         }
1958                 }
1959
1960                 return $filters;
1961         }
1962
1963         function get_score_pic($score) {
1964                 if ($score > 100) {
1965                         return "score_high.png";
1966                 } else if ($score > 0) {
1967                         return "score_half_high.png";
1968                 } else if ($score < -100) {
1969                         return "score_low.png";
1970                 } else if ($score < 0) {
1971                         return "score_half_low.png";
1972                 } else {
1973                         return "score_neutral.png";
1974                 }
1975         }
1976
1977         function init_plugins() {
1978                 PluginHost::getInstance()->load(PLUGINS, PluginHost::KIND_ALL);
1979
1980                 return true;
1981         }
1982
1983         function add_feed_category($feed_cat, $parent_cat_id = false) {
1984
1985                 if (!$feed_cat) return false;
1986
1987                 $feed_cat = mb_substr($feed_cat, 0, 250);
1988                 if (!$parent_cat_id) $parent_cat_id = null;
1989
1990                 $pdo = Db::pdo();
1991                 $tr_in_progress = false;
1992
1993                 try {
1994                         $pdo->beginTransaction();
1995                 } catch (Exception $e) {
1996                         $tr_in_progress = true;
1997                 }
1998
1999                 $sth = $pdo->prepare("SELECT id FROM ttrss_feed_categories
2000                                 WHERE (parent_cat = :parent OR (:parent IS NULL AND parent_cat IS NULL))
2001                                 AND title = :title AND owner_uid = :uid");
2002                 $sth->execute([':parent' => $parent_cat_id, ':title' => $feed_cat, ':uid' => $_SESSION['uid']]);
2003
2004                 if (!$sth->fetch()) {
2005
2006                         $sth = $pdo->prepare("INSERT INTO ttrss_feed_categories (owner_uid,title,parent_cat)
2007                                         VALUES (?, ?, ?)");
2008                         $sth->execute([$_SESSION['uid'], $feed_cat, $parent_cat_id]);
2009
2010                         if (!$tr_in_progress) $pdo->commit();
2011
2012                         return true;
2013                 }
2014
2015                 $pdo->commit();
2016
2017                 return false;
2018         }
2019
2020         /**
2021          * Fixes incomplete URLs by prepending "http://".
2022          * Also replaces feed:// with http://, and
2023          * prepends a trailing slash if the url is a domain name only.
2024          *
2025          * @param string $url Possibly incomplete URL
2026          *
2027          * @return string Fixed URL.
2028          */
2029         function fix_url($url) {
2030
2031                 // support schema-less urls
2032                 if (strpos($url, '//') === 0) {
2033                         $url = 'https:' . $url;
2034                 }
2035
2036                 if (strpos($url, '://') === false) {
2037                         $url = 'http://' . $url;
2038                 } else if (substr($url, 0, 5) == 'feed:') {
2039                         $url = 'http:' . substr($url, 5);
2040                 }
2041
2042                 //prepend slash if the URL has no slash in it
2043                 // "http://www.example" -> "http://www.example/"
2044                 if (strpos($url, '/', strpos($url, ':') + 3) === false) {
2045                         $url .= '/';
2046                 }
2047
2048                 //convert IDNA hostname to punycode if possible
2049                 if (function_exists("idn_to_ascii")) {
2050                         $parts = parse_url($url);
2051                         if (mb_detect_encoding($parts['host']) != 'ASCII')
2052                         {
2053                                 $parts['host'] = idn_to_ascii($parts['host']);
2054                                 $url = build_url($parts);
2055                         }
2056                 }
2057
2058                 if ($url != "http:///")
2059                         return $url;
2060                 else
2061                         return '';
2062         }
2063
2064         function validate_feed_url($url) {
2065                 $parts = parse_url($url);
2066
2067                 return ($parts['scheme'] == 'http' || $parts['scheme'] == 'feed' || $parts['scheme'] == 'https');
2068
2069         }
2070
2071         /* function save_email_address($email) {
2072                 // FIXME: implement persistent storage of emails
2073
2074                 if (!$_SESSION['stored_emails'])
2075                         $_SESSION['stored_emails'] = array();
2076
2077                 if (!in_array($email, $_SESSION['stored_emails']))
2078                         array_push($_SESSION['stored_emails'], $email);
2079         } */
2080
2081
2082         function get_feed_access_key($feed_id, $is_cat, $owner_uid = false) {
2083
2084                 if (!$owner_uid) $owner_uid = $_SESSION["uid"];
2085
2086                 $is_cat = bool_to_sql_bool($is_cat);
2087
2088                 $pdo = Db::pdo();
2089
2090                 $sth = $pdo->prepare("SELECT access_key FROM ttrss_access_keys
2091                                 WHERE feed_id = ? AND is_cat = ?
2092                                 AND owner_uid = ?");
2093                 $sth->execute([$feed_id, $is_cat, $owner_uid]);
2094
2095                 if ($row = $sth->fetch()) {
2096                         return $row["access_key"];
2097                 } else {
2098                         $key = uniqid_short();
2099
2100                         $sth = $pdo->prepare("INSERT INTO ttrss_access_keys
2101                                         (access_key, feed_id, is_cat, owner_uid)
2102                                         VALUES (?, ?, ?, ?)");
2103
2104                         $sth->execute([$key, $feed_id, $is_cat, $owner_uid]);
2105
2106                         return $key;
2107                 }
2108         }
2109
2110         function get_feeds_from_html($url, $content)
2111         {
2112                 $url     = fix_url($url);
2113                 $baseUrl = substr($url, 0, strrpos($url, '/') + 1);
2114
2115                 libxml_use_internal_errors(true);
2116
2117                 $doc = new DOMDocument();
2118                 $doc->loadHTML($content);
2119                 $xpath = new DOMXPath($doc);
2120                 $entries = $xpath->query('/html/head/link[@rel="alternate" and '.
2121                         '(contains(@type,"rss") or contains(@type,"atom"))]|/html/head/link[@rel="feed"]');
2122                 $feedUrls = array();
2123                 foreach ($entries as $entry) {
2124                         if ($entry->hasAttribute('href')) {
2125                                 $title = $entry->getAttribute('title');
2126                                 if ($title == '') {
2127                                         $title = $entry->getAttribute('type');
2128                                 }
2129                                 $feedUrl = rewrite_relative_url(
2130                                         $baseUrl, $entry->getAttribute('href')
2131                                 );
2132                                 $feedUrls[$feedUrl] = $title;
2133                         }
2134                 }
2135                 return $feedUrls;
2136         }
2137
2138         function is_html($content) {
2139                 return preg_match("/<html|DOCTYPE html/i", substr($content, 0, 100)) !== 0;
2140         }
2141
2142         function url_is_html($url, $login = false, $pass = false) {
2143                 return is_html(fetch_file_contents($url, false, $login, $pass));
2144         }
2145
2146         function build_url($parts) {
2147                 return $parts['scheme'] . "://" . $parts['host'] . $parts['path'];
2148         }
2149
2150         function cleanup_url_path($path) {
2151                 $path = str_replace("/./", "/", $path);
2152                 $path = str_replace("//", "/", $path);
2153
2154                 return $path;
2155         }
2156
2157         /**
2158          * Converts a (possibly) relative URL to a absolute one.
2159          *
2160          * @param string $url     Base URL (i.e. from where the document is)
2161          * @param string $rel_url Possibly relative URL in the document
2162          *
2163          * @return string Absolute URL
2164          */
2165         function rewrite_relative_url($url, $rel_url) {
2166                 if (strpos($rel_url, "://") !== false) {
2167                         return $rel_url;
2168                 } else if (strpos($rel_url, "//") === 0) {
2169                         # protocol-relative URL (rare but they exist)
2170                         return $rel_url;
2171                 } else if (preg_match("/^[a-z]+:/i", $rel_url)) {
2172                         # magnet:, feed:, etc
2173                         return $rel_url;
2174                 } else if (strpos($rel_url, "/") === 0) {
2175                         $parts = parse_url($url);
2176                         $parts['path'] = $rel_url;
2177                         $parts['path'] = cleanup_url_path($parts['path']);
2178
2179                         return build_url($parts);
2180
2181                 } else {
2182                         $parts = parse_url($url);
2183                         if (!isset($parts['path'])) {
2184                                 $parts['path'] = '/';
2185                         }
2186                         $dir = $parts['path'];
2187                         if (substr($dir, -1) !== '/') {
2188                                 $dir = dirname($parts['path']);
2189                                 $dir !== '/' && $dir .= '/';
2190                         }
2191                         $parts['path'] = $dir . $rel_url;
2192                         $parts['path'] = cleanup_url_path($parts['path']);
2193
2194                         return build_url($parts);
2195                 }
2196         }
2197
2198         function cleanup_tags($days = 14, $limit = 1000) {
2199
2200                 $days = (int) $days;
2201
2202                 if (DB_TYPE == "pgsql") {
2203                         $interval_query = "date_updated < NOW() - INTERVAL '$days days'";
2204                 } else if (DB_TYPE == "mysql") {
2205                         $interval_query = "date_updated < DATE_SUB(NOW(), INTERVAL $days DAY)";
2206                 }
2207
2208                 $tags_deleted = 0;
2209
2210                 $pdo = Db::pdo();
2211
2212                 while ($limit > 0) {
2213                         $limit_part = 500;
2214
2215                         $sth = $pdo->prepare("SELECT ttrss_tags.id AS id
2216                                         FROM ttrss_tags, ttrss_user_entries, ttrss_entries
2217                                         WHERE post_int_id = int_id AND $interval_query AND
2218                                         ref_id = ttrss_entries.id AND tag_cache != '' LIMIT ?");
2219                         $sth->execute([$limit]);
2220
2221                         $ids = array();
2222
2223                         while ($line = $sth->fetch()) {
2224                                 array_push($ids, $line['id']);
2225                         }
2226
2227                         if (count($ids) > 0) {
2228                                 $ids = join(",", $ids);
2229
2230                                 $usth = $pdo->query("DELETE FROM ttrss_tags WHERE id IN ($ids)");
2231                                 $tags_deleted = $usth->rowCount();
2232                         } else {
2233                                 break;
2234                         }
2235
2236                         $limit -= $limit_part;
2237                 }
2238
2239                 return $tags_deleted;
2240         }
2241
2242         function print_user_stylesheet() {
2243                 $value = get_pref('USER_STYLESHEET');
2244
2245                 if ($value) {
2246                         print "<style type=\"text/css\">";
2247                         print str_replace("<br/>", "\n", $value);
2248                         print "</style>";
2249                 }
2250
2251         }
2252
2253         function filter_to_sql($filter, $owner_uid) {
2254                 $query = array();
2255
2256                 $pdo = Db::pdo();
2257
2258                 if (DB_TYPE == "pgsql")
2259                         $reg_qpart = "~";
2260                 else
2261                         $reg_qpart = "REGEXP";
2262
2263                 foreach ($filter["rules"] AS $rule) {
2264                         $rule['reg_exp'] = str_replace('/', '\/', $rule["reg_exp"]);
2265                         $regexp_valid = preg_match('/' . $rule['reg_exp'] . '/',
2266                                         $rule['reg_exp']) !== FALSE;
2267
2268                         if ($regexp_valid) {
2269
2270                                 $rule['reg_exp'] = $pdo->quote($rule['reg_exp']);
2271
2272                                 switch ($rule["type"]) {
2273                                         case "title":
2274                                                 $qpart = "LOWER(ttrss_entries.title) $reg_qpart LOWER('".
2275                                                         $rule['reg_exp'] . "')";
2276                                                 break;
2277                                         case "content":
2278                                                 $qpart = "LOWER(ttrss_entries.content) $reg_qpart LOWER('".
2279                                                         $rule['reg_exp'] . "')";
2280                                                 break;
2281                                         case "both":
2282                                                 $qpart = "LOWER(ttrss_entries.title) $reg_qpart LOWER('".
2283                                                         $rule['reg_exp'] . "') OR LOWER(" .
2284                                                         "ttrss_entries.content) $reg_qpart LOWER('" . $rule['reg_exp'] . "')";
2285                                                 break;
2286                                         case "tag":
2287                                                 $qpart = "LOWER(ttrss_user_entries.tag_cache) $reg_qpart LOWER('".
2288                                                         $rule['reg_exp'] . "')";
2289                                                 break;
2290                                         case "link":
2291                                                 $qpart = "LOWER(ttrss_entries.link) $reg_qpart LOWER('".
2292                                                         $rule['reg_exp'] . "')";
2293                                                 break;
2294                                         case "author":
2295                                                 $qpart = "LOWER(ttrss_entries.author) $reg_qpart LOWER('".
2296                                                         $rule['reg_exp'] . "')";
2297                                                 break;
2298                                 }
2299
2300                                 if (isset($rule['inverse'])) $qpart = "NOT ($qpart)";
2301
2302                                 if (isset($rule["feed_id"]) && $rule["feed_id"] > 0) {
2303                                         $qpart .= " AND feed_id = " . $pdo->quote($rule["feed_id"]);
2304                                 }
2305
2306                                 if (isset($rule["cat_id"])) {
2307
2308                                         if ($rule["cat_id"] > 0) {
2309                                                 $children = Feeds::getChildCategories($rule["cat_id"], $owner_uid);
2310                                                 array_push($children, $rule["cat_id"]);
2311                                                 $children = array_map("intval", $children);
2312
2313                                                 $children = join(",", $children);
2314
2315                                                 $cat_qpart = "cat_id IN ($children)";
2316                                         } else {
2317                                                 $cat_qpart = "cat_id IS NULL";
2318                                         }
2319
2320                                         $qpart .= " AND $cat_qpart";
2321                                 }
2322
2323                                 $qpart .= " AND feed_id IS NOT NULL";
2324
2325                                 array_push($query, "($qpart)");
2326
2327                         }
2328                 }
2329
2330                 if (count($query) > 0) {
2331                         $fullquery = "(" . join($filter["match_any_rule"] ? "OR" : "AND", $query) . ")";
2332                 } else {
2333                         $fullquery = "(false)";
2334                 }
2335
2336                 if ($filter['inverse']) $fullquery = "(NOT $fullquery)";
2337
2338                 return $fullquery;
2339         }
2340
2341         if (!function_exists('gzdecode')) {
2342                 function gzdecode($string) { // no support for 2nd argument
2343                         return file_get_contents('compress.zlib://data:who/cares;base64,'.
2344                                 base64_encode($string));
2345                 }
2346         }
2347
2348         function get_random_bytes($length) {
2349                 if (function_exists('openssl_random_pseudo_bytes')) {
2350                         return openssl_random_pseudo_bytes($length);
2351                 } else {
2352                         $output = "";
2353
2354                         for ($i = 0; $i < $length; $i++)
2355                                 $output .= chr(mt_rand(0, 255));
2356
2357                         return $output;
2358                 }
2359         }
2360
2361         function read_stdin() {
2362                 $fp = fopen("php://stdin", "r");
2363
2364                 if ($fp) {
2365                         $line = trim(fgets($fp));
2366                         fclose($fp);
2367                         return $line;
2368                 }
2369
2370                 return null;
2371         }
2372
2373         function implements_interface($class, $interface) {
2374                 return in_array($interface, class_implements($class));
2375         }
2376
2377         function get_minified_js($files) {
2378
2379                 $rv = '';
2380
2381                 foreach ($files as $js) {
2382                         if (!isset($_GET['debug'])) {
2383                                 $cached_file = CACHE_DIR . "/js/".basename($js);
2384
2385                                 if (file_exists($cached_file) && is_readable($cached_file) && filemtime($cached_file) >= filemtime("js/$js")) {
2386
2387                                         list($header, $contents) = explode("\n", file_get_contents($cached_file), 2);
2388
2389                                         if ($header && $contents) {
2390                                                 list($htag, $hversion) = explode(":", $header);
2391
2392                                                 if ($htag == "tt-rss" && $hversion == VERSION) {
2393                                                         $rv .= $contents;
2394                                                         continue;
2395                                                 }
2396                                         }
2397                                 }
2398
2399                                 $minified = JShrink\Minifier::minify(file_get_contents("js/$js"));
2400                                 file_put_contents($cached_file, "tt-rss:" . VERSION . "\n" . $minified);
2401                                 $rv .= $minified;
2402
2403                         } else {
2404                                 $rv .= file_get_contents("js/$js"); // no cache in debug mode
2405                         }
2406                 }
2407
2408                 return $rv;
2409         }
2410
2411         function calculate_dep_timestamp() {
2412                 $files = array_merge(glob("js/*.js"), glob("css/*.css"));
2413
2414                 $max_ts = -1;
2415
2416                 foreach ($files as $file) {
2417                         if (filemtime($file) > $max_ts) $max_ts = filemtime($file);
2418                 }
2419
2420                 return $max_ts;
2421         }
2422
2423         function T_js_decl($s1, $s2) {
2424                 if ($s1 && $s2) {
2425                         $s1 = preg_replace("/\n/", "", $s1);
2426                         $s2 = preg_replace("/\n/", "", $s2);
2427
2428                         $s1 = preg_replace("/\"/", "\\\"", $s1);
2429                         $s2 = preg_replace("/\"/", "\\\"", $s2);
2430
2431                         return "T_messages[\"$s1\"] = \"$s2\";\n";
2432                 }
2433         }
2434
2435         function init_js_translations() {
2436
2437                 print 'var T_messages = new Object();
2438
2439                         function __(msg) {
2440                                 if (T_messages[msg]) {
2441                                         return T_messages[msg];
2442                                 } else {
2443                                         return msg;
2444                                 }
2445                         }
2446
2447                         function ngettext(msg1, msg2, n) {
2448                                 return __((parseInt(n) > 1) ? msg2 : msg1);
2449                         }';
2450
2451                 $l10n = _get_reader();
2452
2453                 for ($i = 0; $i < $l10n->total; $i++) {
2454                         $orig = $l10n->get_original_string($i);
2455                         if(strpos($orig, "\000") !== FALSE) { // Plural forms
2456                                 $key = explode(chr(0), $orig);
2457                                 print T_js_decl($key[0], _ngettext($key[0], $key[1], 1)); // Singular
2458                                 print T_js_decl($key[1], _ngettext($key[0], $key[1], 2)); // Plural
2459                         } else {
2460                                 $translation = __($orig);
2461                                 print T_js_decl($orig, $translation);
2462                         }
2463                 }
2464         }
2465
2466         function get_theme_path($theme) {
2467                 if ($theme == "default.php")
2468                         return "css/default.css";
2469
2470                 $check = "themes/$theme";
2471                 if (file_exists($check)) return $check;
2472
2473                 $check = "themes.local/$theme";
2474                 if (file_exists($check)) return $check;
2475         }
2476
2477         function theme_valid($theme) {
2478                 $bundled_themes = [ "default.php", "night.css", "compact.css" ];
2479
2480                 if (in_array($theme, $bundled_themes)) return true;
2481
2482                 $file = "themes/" . basename($theme);
2483
2484                 if (!file_exists($file)) $file = "themes.local/" . basename($theme);
2485
2486                 if (file_exists($file) && is_readable($file)) {
2487                         $fh = fopen($file, "r");
2488
2489                         if ($fh) {
2490                                 $header = fgets($fh);
2491                                 fclose($fh);
2492
2493                                 return strpos($header, "supports-version:" . VERSION_STATIC) !== FALSE;
2494                         }
2495                 }
2496
2497                 return false;
2498         }
2499
2500         /**
2501          * @SuppressWarnings(unused)
2502          */
2503         function error_json($code) {
2504                 require_once "errors.php";
2505
2506                 @$message = $ERRORS[$code];
2507
2508                 return json_encode(array("error" =>
2509                         array("code" => $code, "message" => $message)));
2510
2511         }
2512
2513         /*function abs_to_rel_path($dir) {
2514                 $tmp = str_replace(dirname(__DIR__), "", $dir);
2515
2516                 if (strlen($tmp) > 0 && substr($tmp, 0, 1) == "/") $tmp = substr($tmp, 1);
2517
2518                 return $tmp;
2519         }*/
2520
2521         function get_upload_error_message($code) {
2522
2523                 $errors = array(
2524                         0 => __('There is no error, the file uploaded with success'),
2525                         1 => __('The uploaded file exceeds the upload_max_filesize directive in php.ini'),
2526                         2 => __('The uploaded file exceeds the MAX_FILE_SIZE directive that was specified in the HTML form'),
2527                         3 => __('The uploaded file was only partially uploaded'),
2528                         4 => __('No file was uploaded'),
2529                         6 => __('Missing a temporary folder'),
2530                         7 => __('Failed to write file to disk.'),
2531                         8 => __('A PHP extension stopped the file upload.'),
2532                 );
2533
2534                 return $errors[$code];
2535         }
2536
2537         function base64_img($filename) {
2538                 if (file_exists($filename)) {
2539                         $ext = pathinfo($filename, PATHINFO_EXTENSION);
2540
2541                         return "data:image/$ext;base64," . base64_encode(file_get_contents($filename));
2542                 } else {
2543                         return "";
2544                 }
2545         }
2546
2547         /*      this is essentially a wrapper for readfile() which allows plugins to hook
2548                 output with httpd-specific "fast" implementation i.e. X-Sendfile or whatever else
2549
2550                 hook function should return true if request was handled (or at least attempted to)
2551
2552                 note that this can be called without user context so the plugin to handle this
2553                 should be loaded systemwide in config.php */
2554         function send_local_file($filename) {
2555                 if (file_exists($filename)) {
2556
2557                         if (is_writable($filename)) touch($filename);
2558
2559                         $tmppluginhost = new PluginHost();
2560
2561                         $tmppluginhost->load(PLUGINS, PluginHost::KIND_SYSTEM);
2562                         $tmppluginhost->load_data();
2563
2564                         foreach ($tmppluginhost->get_hooks(PluginHost::HOOK_SEND_LOCAL_FILE) as $plugin) {
2565                                 if ($plugin->hook_send_local_file($filename)) return true;
2566                         }
2567
2568                         $mimetype = mime_content_type($filename);
2569
2570                         // this is hardly ideal but 1) only media is cached in images/ and 2) seemingly only mp4
2571                         // video files are detected as octet-stream by mime_content_type()
2572
2573                         if ($mimetype == "application/octet-stream")
2574                                 $mimetype = "video/mp4";
2575
2576                         header("Content-type: $mimetype");
2577
2578                         $stamp = gmdate("D, d M Y H:i:s", filemtime($filename)) . " GMT";
2579                         header("Last-Modified: $stamp", true);
2580
2581                         return readfile($filename);
2582                 } else {
2583                         return false;
2584                 }
2585         }
2586
2587         function check_mysql_tables() {
2588                 $pdo = Db::pdo();
2589
2590                 $sth = $pdo->prepare("SELECT engine, table_name FROM information_schema.tables WHERE
2591                         table_schema = ? AND table_name LIKE 'ttrss_%' AND engine != 'InnoDB'");
2592                 $sth->execute([DB_NAME]);
2593
2594                 $bad_tables = [];
2595
2596                 while ($line = $sth->fetch()) {
2597                         array_push($bad_tables, $line);
2598                 }
2599
2600                 return $bad_tables;
2601         }
2602
2603         function validate_field($string, $allowed, $default = "") {
2604                 if (in_array($string, $allowed))
2605                         return $string;
2606                 else
2607                         return $default;
2608         }
2609
2610         function arr_qmarks($arr) {
2611                 return str_repeat('?,', count($arr) - 1) . '?';
2612         }