functions.php

   1 <?
   2         session_start();
   3
   4         if ($_GET["debug"]) {
   5                 define('DEFAULT_ERROR_LEVEL', E_ALL);
   6         } else {
   7                 define('DEFAULT_ERROR_LEVEL', E_ERROR | E_WARNING | E_PARSE);
   8         }
   9
  10         require_once 'config.php';
  11         require_once 'db-prefs.php';
  12
  13         define('MAGPIE_OUTPUT_ENCODING', 'UTF-8');
  14
  15         function purge_feed($link, $feed_id, $purge_interval) {
  16
  17                 if (DB_TYPE == "pgsql") {
  18                         db_query($link, "DELETE FROM ttrss_user_entries WHERE
  19                                 marked = false AND feed_id = '$feed_id' AND
  20                                 (SELECT date_entered FROM ttrss_entries WHERE
  21                                         id = ref_id) < NOW() - INTERVAL '$purge_interval days'");
  22                 } else {
  23                         db_query($link, "DELETE FROM ttrss_user_entries WHERE
  24                                 marked = false AND feed_id = '$feed_id' AND
  25                                 (SELECT date_entered FROM ttrss_entries WHERE
  26                                         id = ref_id) < DATE_SUB(NOW(), INTERVAL $purge_interval DAY)");
  27                 }
  28         }
  29
  30         function global_purge_old_posts($link, $do_output = false) {
  31
  32                 $result = db_query($link,
  33                         "SELECT id,purge_interval,owner_uid FROM ttrss_feeds");
  34
  35                 while ($line = db_fetch_assoc($result)) {
  36
  37                         $feed_id = $line["id"];
  38                         $purge_interval = $line["purge_interval"];
  39                         $owner_uid = $line["owner_uid"];
  40
  41                         if ($purge_interval == 0) {
  42
  43                                 $tmp_result = db_query($link,
  44                                         "SELECT value FROM ttrss_user_prefs WHERE
  45                                                 pref_name = 'PURGE_OLD_DAYS' AND owner_uid = '$owner_uid'");
  46
  47                                 if (db_num_rows($tmp_result) != 0) {
  48                                         $purge_interval = db_fetch_result($tmp_result, 0, "value");
  49                                 }
  50                         }
  51
  52                         if ($do_output) {
  53                                 print "<feed id='$feed_id' p_intl='$purge_interval'/>";
  54                         }
  55
  56                         if ($purge_interval > 0) {
  57                                 purge_feed($link, $feed_id, $purge_interval);
  58                         }
  59                 }
  60
  61                 // purge orphaned posts in main content table
  62                 db_query($link, "DELETE FROM ttrss_entries WHERE
  63                         (SELECT COUNT(int_id) FROM ttrss_user_entries WHERE ref_id = id) = 0");
  64
  65         }
  66
  67         function purge_old_posts($link) {
  68
  69                 $user_id = $_SESSION["uid"];
  70
  71                 $result = db_query($link, "SELECT id,purge_interval FROM ttrss_feeds
  72                         WHERE owner_uid = '$user_id'");
  73
  74                 while ($line = db_fetch_assoc($result)) {
  75
  76                         $feed_id = $line["id"];
  77                         $purge_interval = $line["purge_interval"];
  78
  79                         if ($purge_interval == 0) $purge_interval = get_pref($link, 'PURGE_OLD_DAYS');
  80
  81                         if ($purge_interval > 0) {
  82                                 purge_feed($link, $feed_id, $purge_interval);
  83                         }
  84                 }
  85
  86                 // purge orphaned posts in main content table
  87                 db_query($link, "DELETE FROM ttrss_entries WHERE
  88                         (SELECT COUNT(int_id) FROM ttrss_user_entries WHERE ref_id = id) = 0");
  89         }
  90
  91         function update_all_feeds($link, $fetch, $user_id = false) {
  92
  93                 if (WEB_DEMO_MODE) return;
  94
  95                 if (!$user_id) {
  96                         $user_id = $_SESSION["uid"];
  97                         purge_old_posts($link);
  98                 }
  99
 100                 if (DAEMON_REFRESH_ONLY && !$_GET["daemon"]) {
 101                         return;
 102                 }
 103
 104 //              db_query($link, "BEGIN");
 105
 106                 $result = db_query($link, "SELECT feed_url,id,
 107                         substring(last_updated,1,19) as last_updated,
 108                         update_interval FROM ttrss_feeds WHERE owner_uid = '$user_id'");
 109
 110                 while ($line = db_fetch_assoc($result)) {
 111                         $upd_intl = $line["update_interval"];
 112
 113                         if (!$upd_intl || $upd_intl == 0) {
 114                                 $upd_intl = get_pref($link, 'DEFAULT_UPDATE_INTERVAL', $user_id);
 115                         }
 116
 117                         if ($fetch || (!$line["last_updated"] ||
 118                                 time() - strtotime($line["last_updated"]) > ($upd_intl * 60))) {
 119
 120                                 update_rss_feed($link, $line["feed_url"], $line["id"]);
 121                         }
 122                 }
 123
 124 //              db_query($link, "COMMIT");
 125
 126         }
 127
 128         function check_feed_favicon($feed_url, $feed, $link) {
 129                 $feed_url = str_replace("http://", "", $feed_url);
 130                 $feed_url = preg_replace("/\/.*$/", "", $feed_url);
 131
 132                 $icon_url = "http://$feed_url/favicon.ico";
 133                 $icon_file = ICONS_DIR . "/$feed.ico";
 134
 135                 if (!file_exists($icon_file)) {
 136
 137                         error_reporting(0);
 138                         $r = fopen($icon_url, "r");
 139                         error_reporting (DEFAULT_ERROR_LEVEL);
 140
 141                         if ($r) {
 142                                 $tmpfname = tempnam("/tmp", "ttrssicon");
 143
 144                                 $t = fopen($tmpfname, "w");
 145
 146                                 while (!feof($r)) {
 147                                         $buf = fread($r, 16384);
 148                                         fwrite($t, $buf);
 149                                 }
 150
 151                                 fclose($r);
 152                                 fclose($t);
 153
 154                                 error_reporting(0);
 155                                 if (!rename($tmpfname, $icon_file)) {
 156                                         unlink($tmpfname);
 157                                 }
 158
 159                                 chmod($icon_file, 0644);
 160
 161                                 error_reporting (DEFAULT_ERROR_LEVEL);
 162
 163                         }
 164                 }
 165         }
 166
 167         function update_rss_feed($link, $feed_url, $feed) {
 168
 169                 if (WEB_DEMO_MODE) return;
 170
 171                 $feed = db_escape_string($feed);
 172
 173                 error_reporting(0);
 174                 $rss = fetch_rss($feed_url);
 175
 176                 error_reporting (DEFAULT_ERROR_LEVEL);
 177
 178                 db_query($link, "BEGIN");
 179
 180                 $feed = db_escape_string($feed);
 181
 182                 if ($rss) {
 183
 184                         $result = db_query($link, "SELECT title,icon_url,site_url,owner_uid
 185                                 FROM ttrss_feeds WHERE id = '$feed'");
 186
 187                         $registered_title = db_fetch_result($result, 0, "title");
 188                         $orig_icon_url = db_fetch_result($result, 0, "icon_url");
 189                         $orig_site_url = db_fetch_result($result, 0, "site_url");
 190
 191                         $owner_uid = db_fetch_result($result, 0, "owner_uid");
 192
 193                         if (get_pref($link, 'ENABLE_FEED_ICONS', $owner_uid)) {
 194                                 check_feed_favicon($feed_url, $feed, $link);
 195                         }
 196
 197                         if (!$registered_title) {
 198                                 $feed_title = db_escape_string($rss->channel["title"]);
 199                                 db_query($link, "UPDATE ttrss_feeds SET
 200                                         title = '$feed_title' WHERE id = '$feed'");
 201                         }
 202
 203                         $site_url = $rss->channel["link"];
 204
 205                         if ($site_url && $orig_site_url != db_escape_string($site_url)) {
 206                                 $site_url = db_escape_string($rss->channel["link"]);
 207                                 db_query($link, "UPDATE ttrss_feeds SET
 208                                         site_url = '$site_url' WHERE id = '$feed'");
 209                         }
 210
 211 //                      print "I: " . $rss->channel["image"]["url"];
 212
 213                         $icon_url = $rss->image["url"];
 214
 215                         if ($icon_url && !$orig_icon_url != db_escape_string($icon_url)) {
 216                                 $icon_url = db_escape_string($icon_url);
 217                                 db_query($link, "UPDATE ttrss_feeds SET icon_url = '$icon_url' WHERE id = '$feed'");
 218                         }
 219
 220
 221                         $filters = array();
 222
 223                         $result = db_query($link, "SELECT reg_exp,
 224                                 (SELECT name FROM ttrss_filter_types
 225                                         WHERE id = filter_type) as name
 226                                 FROM ttrss_filters WHERE
 227                                 owner_uid = $owner_uid AND
 228                                 (feed_id IS NULL OR feed_id = '$feed')");
 229
 230                         while ($line = db_fetch_assoc($result)) {
 231                                 if (!$filters[$line["name"]]) $filters[$line["name"]] = array();
 232                                 array_push($filters[$line["name"]], $line["reg_exp"]);
 233                         }
 234
 235                         foreach ($rss->items as $item) {
 236
 237                                 $entry_guid = $item["id"];
 238
 239                                 if (!$entry_guid) $entry_guid = $item["guid"];
 240                                 if (!$entry_guid) $entry_guid = $item["link"];
 241
 242                                 if (!$entry_guid) continue;
 243
 244                                 $entry_timestamp = "";
 245
 246                                 $rss_2_date = $item['pubdate'];
 247                                 $rss_1_date = $item['dc']['date'];
 248                                 $atom_date = $item['issued'];
 249
 250                                 if ($atom_date != "") $entry_timestamp = parse_w3cdtf($atom_date);
 251                                 if ($rss_1_date != "") $entry_timestamp = parse_w3cdtf($rss_1_date);
 252                                 if ($rss_2_date != "") $entry_timestamp = strtotime($rss_2_date);
 253
 254                                 if ($entry_timestamp == "") {
 255                                         $entry_timestamp = time();
 256                                         $no_orig_date = 'true';
 257                                 } else {
 258                                         $no_orig_date = 'false';
 259                                 }
 260
 261                                 $entry_timestamp_fmt = strftime("%Y/%m/%d %H:%M:%S", $entry_timestamp);
 262
 263                                 $entry_title = $item["title"];
 264                                 $entry_link = $item["link"];
 265
 266                                 if (!$entry_title) continue;
 267                                 if (!$entry_link) continue;
 268
 269                                 $entry_content = $item["content:escaped"];
 270
 271                                 if (!$entry_content) $entry_content = $item["content:encoded"];
 272                                 if (!$entry_content) $entry_content = $item["content"];
 273                                 if (!$entry_content) $entry_content = $item["description"];
 274
 275                                 $entry_content_unescaped = $entry_content;
 276
 277 //                              if (!$entry_content) continue;
 278
 279                                 // WTF
 280                                 if (is_array($entry_content)) {
 281                                         $entry_content = $entry_content["encoded"];
 282                                         if (!$entry_content) $entry_content = $entry_content["escaped"];
 283                                 }
 284
 285 //                              print_r($item);
 286 //                              print_r($entry_content);
 287
 288                                 $content_hash = "SHA1:" . sha1(strip_tags($entry_content));
 289
 290                                 $entry_comments = $item["comments"];
 291
 292                                 $entry_guid = db_escape_string($entry_guid);
 293
 294                                 $result = db_query($link, "SELECT id FROM       ttrss_entries
 295                                         WHERE guid = '$entry_guid'");
 296
 297                                 $entry_content = db_escape_string($entry_content);
 298                                 $entry_title = db_escape_string($entry_title);
 299                                 $entry_link = db_escape_string($entry_link);
 300                                 $entry_comments = db_escape_string($entry_comments);
 301
 302                                 if (db_num_rows($result) == 0) {
 303
 304                                         // base post entry does not exist, create it
 305
 306                                         $result = db_query($link,
 307                                                 "INSERT INTO ttrss_entries
 308                                                         (title,
 309                                                         guid,
 310                                                         link,
 311                                                         updated,
 312                                                         content,
 313                                                         content_hash,
 314                                                         no_orig_date,
 315                                                         date_entered,
 316                                                         comments)
 317                                                 VALUES
 318                                                         ('$entry_title',
 319                                                         '$entry_guid',
 320                                                         '$entry_link',
 321                                                         '$entry_timestamp_fmt',
 322                                                         '$entry_content',
 323                                                         '$content_hash',
 324                                                         $no_orig_date,
 325                                                         NOW(),
 326                                                         '$entry_comments')");
 327                                 }
 328
 329                                 // now it should exist, if not - bad luck then
 330
 331                                 $result = db_query($link, "SELECT
 332                                                 id,content_hash,no_orig_date,title,
 333                                                 substring(updated,1,19) as updated
 334                                         FROM
 335                                                 ttrss_entries
 336                                         WHERE guid = '$entry_guid'");
 337
 338                                 if (db_num_rows($result) == 1) {
 339
 340                                                 // this will be used below in update handler
 341                                                 $orig_content_hash = db_fetch_result($result, 0, "content_hash");
 342 //                                              $orig_timestamp = strtotime(db_fetch_result($result, 0, "updated"));
 343 //                                              $orig_no_orig_date = db_fetch_result($result, 0, "no_orig_date");
 344                                                 $orig_title = db_fetch_result($result, 0, "title");
 345
 346                                                 $ref_id = db_fetch_result($result, 0, "id");
 347
 348                                                 // check for user post link to main table
 349
 350                                                 // do we allow duplicate posts with same GUID in different feeds?
 351                                                 if (get_pref($link, "ALLOW_DUPLICATE_POSTS", $owner_uid)) {
 352                                                         $dupcheck_qpart = "AND feed_id = '$feed'";
 353                                                 } else {
 354                                                         $dupcheck_qpart = "";
 355                                                 }
 356
 357                                                 error_reporting(0);
 358                                                 if (is_filtered($entry_title, $entry_content, $entry_link, $filters)) {
 359                                                         continue;
 360                                                 }
 361                                                 error_reporting (DEFAULT_ERROR_LEVEL);
 362
 363                                                 $result = db_query($link,
 364                                                         "SELECT ref_id FROM ttrss_user_entries WHERE
 365                                                                 ref_id = '$ref_id' AND owner_uid = '$owner_uid'
 366                                                                 $dupcheck_qpart");
 367
 368                                                 // okay it doesn't exist - create user entry
 369                                                 if (db_num_rows($result) == 0) {
 370                                                         $result = db_query($link,
 371                                                                 "INSERT INTO ttrss_user_entries
 372                                                                         (ref_id, owner_uid, feed_id)
 373                                                                 VALUES ('$ref_id', '$owner_uid', '$feed')");
 374                                                 }
 375
 376                                         $post_needs_update = false;
 377
 378                                         if (get_pref($link, "UPDATE_POST_ON_CHECKSUM_CHANGE", $owner_uid) &&
 379                                                 ($content_hash != $orig_content_hash)) {
 380                                                 $post_needs_update = true;
 381                                         }
 382
 383                                         if ($orig_title != $entry_title) {
 384                                                 $post_needs_update = true;
 385                                         }
 386
 387 //                                      this doesn't seem to be very reliable
 388 //
 389 //                                      if ($orig_timestamp != $entry_timestamp && !$orig_no_orig_date) {
 390 //                                              $post_needs_update = true;
 391 //                                      }
 392
 393                                         // if post needs update, update it and mark all user entries
 394                                         // linking to this post as updated
 395                                         if ($post_needs_update) {
 396
 397 //                                              print "<!-- post $orig_title needs update : $post_needs_update -->";
 398
 399                                                 db_query($link, "UPDATE ttrss_entries
 400                                                         SET title = '$entry_title', content = '$entry_content'
 401                                                         WHERE id = '$ref_id'");
 402
 403                                                 db_query($link, "UPDATE ttrss_user_entries
 404                                                         SET last_read = null WHERE ref_id = '$ref_id' AND unread = false");
 405
 406                                         }
 407                                 }
 408
 409                                 /* taaaags */
 410                                 // <a href="http://technorati.com/tag/Xorg" rel="tag">Xorg</a>, //
 411
 412                                 $entry_tags = null;
 413
 414                                 preg_match_all("/<a.*?rel=.tag.*?>([^>]+)<\/a>/i",
 415                                         $entry_content_unescaped, $entry_tags);
 416
 417 //                              print "<br>$entry_title : $entry_content_unescaped<br>";
 418 //                              print_r($entry_tags);
 419
 420                                 $entry_tags = $entry_tags[1];
 421
 422                                 if (count($entry_tags) > 0) {
 423
 424                                         $result = db_query($link, "SELECT id,int_id
 425                                                 FROM ttrss_entries,ttrss_user_entries
 426                                                 WHERE guid = '$entry_guid'
 427                                                 AND feed_id = '$feed' AND ref_id = id
 428                                                 AND owner_uid = '$owner_uid'");
 429
 430                                         if (db_num_rows($result) == 1) {
 431
 432                                                 $entry_id = db_fetch_result($result, 0, "id");
 433                                                 $entry_int_id = db_fetch_result($result, 0, "int_id");
 434
 435                                                 foreach ($entry_tags as $tag) {
 436                                                         $tag = db_escape_string(strtolower($tag));
 437
 438                                                         $tag = str_replace("technorati tag: ", "", $tag);
 439
 440                                                         $result = db_query($link, "SELECT id FROM ttrss_tags
 441                                                                 WHERE tag_name = '$tag' AND post_int_id = '$entry_int_id' AND
 442                                                                 owner_uid = '$owner_uid' LIMIT 1");
 443
 444         //                                              print db_fetch_result($result, 0, "id");
 445
 446                                                         if ($result && db_num_rows($result) == 0) {
 447
 448         //                                                      print "tagging $entry_id as $tag<br>";
 449
 450                                                                 db_query($link, "INSERT INTO ttrss_tags
 451                                                                         (owner_uid,tag_name,post_int_id)
 452                                                                         VALUES ('$owner_uid','$tag', '$entry_int_id')");
 453                                                         }
 454                                                 }
 455                                         }
 456                                 }
 457                         }
 458
 459                         db_query($link, "UPDATE ttrss_feeds
 460                                 SET last_updated = NOW(), last_error = '' WHERE id = '$feed'");
 461
 462                 } else {
 463                         $error_msg = db_escape_string(magpie_error());
 464                         db_query($link,
 465                                 "UPDATE ttrss_feeds SET last_error = '$error_msg',
 466                                         last_updated = NOW() WHERE id = '$feed'");
 467                 }
 468
 469                 db_query($link, "COMMIT");
 470
 471         }
 472
 473         function print_select($id, $default, $values, $attributes = "") {
 474                 print "<select id=\"$id\" $attributes>";
 475                 foreach ($values as $v) {
 476                         if ($v == $default)
 477                                 $sel = " selected";
 478                          else
 479                                 $sel = "";
 480
 481                         print "<option$sel>$v</option>";
 482                 }
 483                 print "</select>";
 484         }
 485
 486         function is_filtered($title, $content, $link, $filters) {
 487
 488                 if ($filters["title"]) {
 489                         foreach ($filters["title"] as $title_filter) {
 490                                 if (preg_match("/$title_filter/i", $title))
 491                                         return true;
 492                         }
 493                 }
 494
 495                 if ($filters["content"]) {
 496                         foreach ($filters["content"] as $content_filter) {
 497                                 if (preg_match("/$content_filter/i", $content))
 498                                         return true;
 499                         }
 500                 }
 501
 502                 if ($filters["both"]) {
 503                         foreach ($filters["both"] as $filter) {
 504                                 if (preg_match("/$filter/i", $title) || preg_match("/$filter/i", $content))
 505                                         return true;
 506                         }
 507                 }
 508
 509                 if ($filters["link"]) {
 510                         foreach ($filters["link"] as $link_filter) {
 511                                 if (preg_match("/$link_filter/i", $link))
 512                                         return true;
 513                         }
 514                 }
 515
 516                 return false;
 517         }
 518
 519         function printFeedEntry($feed_id, $class, $feed_title, $unread, $icon_file, $link) {
 520
 521                 if (file_exists($icon_file) && filesize($icon_file) > 0) {
 522                                 $feed_icon = "<img src=\"$icon_file\">";
 523                 } else {
 524                         $feed_icon = "<img src=\"images/blank_icon.gif\">";
 525                 }
 526
 527                 $feed = "<a href=\"javascript:viewfeed('$feed_id', 0);\">$feed_title</a>";
 528
 529                 print "<li id=\"FEEDR-$feed_id\" class=\"$class\">";
 530                 if (get_pref($link, 'ENABLE_FEED_ICONS')) {
 531                         print "$feed_icon";
 532                 }
 533
 534                 print "<span id=\"FEEDN-$feed_id\">$feed</span>";
 535
 536                 if ($unread != 0) {
 537                         $fctr_class = "";
 538                 } else {
 539                         $fctr_class = "class=\"invisible\"";
 540                 }
 541
 542                 print "<span $fctr_class id=\"FEEDCTR-$feed_id\">
 543                          (<span id=\"FEEDU-$feed_id\">$unread</span>)</span>";
 544
 545                 print "</li>";
 546
 547         }
 548
 549         function getmicrotime() {
 550                 list($usec, $sec) = explode(" ",microtime());
 551                 return ((float)$usec + (float)$sec);
 552         }
 553
 554         function print_radio($id, $default, $values, $attributes = "") {
 555                 foreach ($values as $v) {
 556
 557                         if ($v == $default)
 558                                 $sel = "checked";
 559                          else
 560                                 $sel = "";
 561
 562                         if ($v == "Yes") {
 563                                 $sel .= " value=\"1\"";
 564                         } else {
 565                                 $sel .= " value=\"0\"";
 566                         }
 567
 568                         print "<input type=\"radio\" $sel $attributes name=\"$id\">&nbsp;$v&nbsp;";
 569
 570                 }
 571         }
 572
 573         function initialize_user_prefs($link, $uid) {
 574
 575                 $uid = db_escape_string($uid);
 576
 577                 db_query($link, "BEGIN");
 578
 579                 $result = db_query($link, "SELECT pref_name,def_value FROM ttrss_prefs");
 580
 581                 $u_result = db_query($link, "SELECT pref_name
 582                         FROM ttrss_user_prefs WHERE owner_uid = '$uid'");
 583
 584                 $active_prefs = array();
 585
 586                 while ($line = db_fetch_assoc($u_result)) {
 587                         array_push($active_prefs, $line["pref_name"]);
 588                 }
 589
 590                 while ($line = db_fetch_assoc($result)) {
 591                         if (array_search($line["pref_name"], $active_prefs) === FALSE) {
 592 //                              print "adding " . $line["pref_name"] . "<br>";
 593
 594                                 db_query($link, "INSERT INTO ttrss_user_prefs
 595                                         (owner_uid,pref_name,value) VALUES
 596                                         ('$uid', '".$line["pref_name"]."','".$line["def_value"]."')");
 597
 598                         }
 599                 }
 600
 601                 db_query($link, "COMMIT");
 602
 603         }
 604
 605         function authenticate_user($link, $login, $password) {
 606
 607                 $pwd_hash = 'SHA1:' . sha1($password);
 608
 609                 $result = db_query($link, "SELECT id,login,access_level FROM ttrss_users WHERE
 610                         login = '$login' AND (pwd_hash = '$password' OR pwd_hash = '$pwd_hash')");
 611
 612                 if (db_num_rows($result) == 1) {
 613                         $_SESSION["uid"] = db_fetch_result($result, 0, "id");
 614                         $_SESSION["name"] = db_fetch_result($result, 0, "login");
 615                         $_SESSION["access_level"] = db_fetch_result($result, 0, "access_level");
 616
 617                         db_query($link, "UPDATE ttrss_users SET last_login = NOW() WHERE id = " .
 618                                 $_SESSION["uid"]);
 619
 620                         initialize_user_prefs($link, $_SESSION["uid"]);
 621
 622                         return true;
 623                 }
 624
 625                 return false;
 626
 627         }
 628
 629         function make_password($length = 8) {
 630
 631                 $password = "";
 632                 $possible = "0123456789bcdfghjkmnpqrstvwxyz";
 633
 634                 $i = 0;
 635
 636                 while ($i < $length) {
 637                         $char = substr($possible, mt_rand(0, strlen($possible)-1), 1);
 638
 639                         if (!strstr($password, $char)) {
 640                                 $password .= $char;
 641                                 $i++;
 642                         }
 643                 }
 644                 return $password;
 645         }
 646
 647         // this is called after user is created to initialize default feeds, labels
 648         // or whatever else
 649
 650         // user preferences are checked on every login, not here
 651
 652         function initialize_user($link, $uid) {
 653
 654                 db_query($link, "insert into ttrss_labels (owner_uid,sql_exp,description)
 655                         values ('$uid','unread = true', 'Unread articles')");
 656
 657                 db_query($link, "insert into ttrss_labels (owner_uid,sql_exp,description)
 658                         values ('$uid','last_read is null and unread = false', 'Updated articles')");
 659
 660                 db_query($link, "insert into ttrss_feeds (owner_uid,title,feed_url)
 661                         values ('$uid', 'Tiny Tiny RSS: New Releases',
 662                         'http://tt-rss.spb.ru/releases.rss')");
 663
 664         }
 665
 666         function logout_user() {
 667                 session_destroy();
 668         }
 669
 670         function login_sequence($link) {
 671                 if (!SINGLE_USER_MODE) {
 672
 673                         if (!USE_HTTP_AUTH) {
 674                                 if (!$_SESSION["uid"]) {
 675                                         header("Location: login.php?rt=tt-rss.php");
 676                                         exit;
 677                                 }
 678                         } else {
 679                                 if (!$_SESSION["uid"]) {
 680                                         if (!$_SERVER["PHP_AUTH_USER"]) {
 681
 682                                                 header('WWW-Authenticate: Basic realm="Tiny Tiny RSS"');
 683                                                 header('HTTP/1.0 401 Unauthorized');
 684                                                 exit;
 685
 686                                         } else {
 687                                                 $auth_result = authenticate_user($link,
 688                                                         $_SERVER["PHP_AUTH_USER"], $_SERVER["PHP_AUTH_PW"]);
 689
 690                                                 if (!$auth_result) {
 691                                                         header('WWW-Authenticate: Basic realm="Tiny Tiny RSS"');
 692                                                         header('HTTP/1.0 401 Unauthorized');
 693                                                         exit;
 694                                                 }
 695                                         }
 696                                 }
 697                         }
 698                 } else {
 699                         $_SESSION["uid"] = 1;
 700                         $_SESSION["name"] = "admin";
 701                         initialize_user_prefs($link, 1);
 702                 }
 703         }
 704
 705         function truncate_string($str, $max_len) {
 706                 if (strlen($str) > $max_len) {
 707                         return substr($str, 0, $max_len) . "...";
 708                 } else {
 709                         return $str;
 710                 }
 711         }
 712 ?>