functions.php

   1 <?
   2
   3         if ($_GET["debug"]) {
   4                 define('DEFAULT_ERROR_LEVEL', E_ALL);
   5         } else {
   6                 define('DEFAULT_ERROR_LEVEL', E_ERROR | E_WARNING | E_PARSE);
   7         }
   8
   9         require_once 'config.php';
  10         require_once 'db-prefs.php';
  11
  12         require_once 'magpierss/rss_utils.inc';
  13
  14         define('MAGPIE_OUTPUT_ENCODING', 'UTF-8');
  15
  16         function purge_feed($link, $feed_id, $purge_interval) {
  17
  18                 if (DB_TYPE == "pgsql") {
  19                         db_query($link, "DELETE FROM ttrss_user_entries WHERE
  20                                 marked = false AND feed_id = '$feed_id' AND
  21                                 (SELECT date_entered FROM ttrss_entries WHERE
  22                                         id = ref_id) < NOW() - INTERVAL '$purge_interval days'");
  23                 } else {
  24                         db_query($link, "DELETE FROM ttrss_user_entries WHERE
  25                                 marked = false AND feed_id = '$feed_id' AND
  26                                 (SELECT date_entered FROM ttrss_entries WHERE
  27                                         id = ref_id) < DATE_SUB(NOW(), INTERVAL $purge_interval DAY)");
  28                 }
  29         }
  30
  31         function global_purge_old_posts($link, $do_output = false) {
  32
  33                 $result = db_query($link,
  34                         "SELECT id,purge_interval,owner_uid FROM ttrss_feeds");
  35
  36                 while ($line = db_fetch_assoc($result)) {
  37
  38                         $feed_id = $line["id"];
  39                         $purge_interval = $line["purge_interval"];
  40                         $owner_uid = $line["owner_uid"];
  41
  42                         if ($purge_interval == 0) {
  43
  44                                 $tmp_result = db_query($link,
  45                                         "SELECT value FROM ttrss_user_prefs WHERE
  46                                                 pref_name = 'PURGE_OLD_DAYS' AND owner_uid = '$owner_uid'");
  47
  48                                 if (db_num_rows($tmp_result) != 0) {
  49                                         $purge_interval = db_fetch_result($tmp_result, 0, "value");
  50                                 }
  51                         }
  52
  53                         if ($do_output) {
  54                                 print "<feed id='$feed_id' p_intl='$purge_interval'/>";
  55                         }
  56
  57                         if ($purge_interval > 0) {
  58                                 purge_feed($link, $feed_id, $purge_interval);
  59                         }
  60                 }
  61
  62                 // purge orphaned posts in main content table
  63                 db_query($link, "DELETE FROM ttrss_entries WHERE
  64                         (SELECT COUNT(int_id) FROM ttrss_user_entries WHERE ref_id = id) = 0");
  65
  66         }
  67
  68         function purge_old_posts($link) {
  69
  70                 $user_id = $_SESSION["uid"];
  71
  72                 $result = db_query($link, "SELECT id,purge_interval FROM ttrss_feeds
  73                         WHERE owner_uid = '$user_id'");
  74
  75                 while ($line = db_fetch_assoc($result)) {
  76
  77                         $feed_id = $line["id"];
  78                         $purge_interval = $line["purge_interval"];
  79
  80                         if ($purge_interval == 0) $purge_interval = get_pref($link, 'PURGE_OLD_DAYS');
  81
  82                         if ($purge_interval > 0) {
  83                                 purge_feed($link, $feed_id, $purge_interval);
  84                         }
  85                 }
  86
  87                 // purge orphaned posts in main content table
  88                 db_query($link, "DELETE FROM ttrss_entries WHERE
  89                         (SELECT COUNT(int_id) FROM ttrss_user_entries WHERE ref_id = id) = 0");
  90         }
  91
  92         function update_all_feeds($link, $fetch, $user_id = false, $force_daemon = false) {
  93
  94                 if (WEB_DEMO_MODE) return;
  95
  96                 if (!$user_id) {
  97                         $user_id = $_SESSION["uid"];
  98                         purge_old_posts($link);
  99                 }
 100
 101 //              db_query($link, "BEGIN");
 102
 103                 $result = db_query($link, "SELECT feed_url,id,
 104                         substring(last_updated,1,19) as last_updated,
 105                         update_interval FROM ttrss_feeds WHERE owner_uid = '$user_id'");
 106
 107                 while ($line = db_fetch_assoc($result)) {
 108                         $upd_intl = $line["update_interval"];
 109
 110                         if (!$upd_intl || $upd_intl == 0) {
 111                                 $upd_intl = get_pref($link, 'DEFAULT_UPDATE_INTERVAL', $user_id);
 112                         }
 113
 114                         if ($fetch || (!$line["last_updated"] ||
 115                                 time() - strtotime($line["last_updated"]) > ($upd_intl * 60))) {
 116
 117                                 update_rss_feed($link, $line["feed_url"], $line["id"], $force_daemon);
 118                         }
 119                 }
 120
 121 //              db_query($link, "COMMIT");
 122
 123         }
 124
 125         function check_feed_favicon($feed_url, $feed, $link) {
 126                 $feed_url = str_replace("http://", "", $feed_url);
 127                 $feed_url = preg_replace("/\/.*$/", "", $feed_url);
 128
 129                 $icon_url = "http://$feed_url/favicon.ico";
 130                 $icon_file = ICONS_DIR . "/$feed.ico";
 131
 132                 if (!file_exists($icon_file)) {
 133
 134                         error_reporting(0);
 135                         $r = fopen($icon_url, "r");
 136                         error_reporting (DEFAULT_ERROR_LEVEL);
 137
 138                         if ($r) {
 139                                 $tmpfname = tempnam("/tmp", "ttrssicon");
 140
 141                                 $t = fopen($tmpfname, "w");
 142
 143                                 while (!feof($r)) {
 144                                         $buf = fread($r, 16384);
 145                                         fwrite($t, $buf);
 146                                 }
 147
 148                                 fclose($r);
 149                                 fclose($t);
 150
 151                                 error_reporting(0);
 152                                 if (!rename($tmpfname, $icon_file)) {
 153                                         unlink($tmpfname);
 154                                 }
 155
 156                                 chmod($icon_file, 0644);
 157
 158                                 error_reporting (DEFAULT_ERROR_LEVEL);
 159
 160                         }
 161                 }
 162         }
 163
 164         function update_rss_feed($link, $feed_url, $feed, $ignore_daemon = false) {
 165
 166                 if (WEB_DEMO_MODE) return;
 167
 168                 if (DAEMON_REFRESH_ONLY && !$_GET["daemon"] && !$ignore_daemon) {
 169                         return;
 170                 }
 171
 172                 $result = db_query($link, "SELECT update_interval
 173                         FROM ttrss_feeds WHERE id = '$feed'");
 174
 175                 $update_interval = db_fetch_result($result, 0, "update_interval");
 176
 177                 if ($update_interval < 0) { return; }
 178
 179                 $feed = db_escape_string($feed);
 180
 181                 error_reporting(0);
 182                 $rss = fetch_rss($feed_url);
 183
 184                 error_reporting (DEFAULT_ERROR_LEVEL);
 185
 186                 $feed = db_escape_string($feed);
 187
 188                 if ($rss) {
 189
 190                         db_query($link, "BEGIN");
 191
 192                         $result = db_query($link, "SELECT title,icon_url,site_url,owner_uid
 193                                 FROM ttrss_feeds WHERE id = '$feed'");
 194
 195                         $registered_title = db_fetch_result($result, 0, "title");
 196                         $orig_icon_url = db_fetch_result($result, 0, "icon_url");
 197                         $orig_site_url = db_fetch_result($result, 0, "site_url");
 198
 199                         $owner_uid = db_fetch_result($result, 0, "owner_uid");
 200
 201                         if (get_pref($link, 'ENABLE_FEED_ICONS', $owner_uid)) {
 202                                 check_feed_favicon($feed_url, $feed, $link);
 203                         }
 204
 205                         if (!$registered_title) {
 206                                 $feed_title = db_escape_string($rss->channel["title"]);
 207                                 db_query($link, "UPDATE ttrss_feeds SET
 208                                         title = '$feed_title' WHERE id = '$feed'");
 209                         }
 210
 211                         $site_url = $rss->channel["link"];
 212                         // weird, weird Magpie
 213                         if (!$site_url) $site_url = db_escape_string($rss->channel["link_"]);
 214
 215                         if ($site_url && $orig_site_url != db_escape_string($site_url)) {
 216                                 db_query($link, "UPDATE ttrss_feeds SET
 217                                         site_url = '$site_url' WHERE id = '$feed'");
 218                         }
 219
 220 //                      print "I: " . $rss->channel["image"]["url"];
 221
 222                         $icon_url = $rss->image["url"];
 223
 224                         if ($icon_url && !$orig_icon_url != db_escape_string($icon_url)) {
 225                                 $icon_url = db_escape_string($icon_url);
 226                                 db_query($link, "UPDATE ttrss_feeds SET icon_url = '$icon_url' WHERE id = '$feed'");
 227                         }
 228
 229
 230                         $filters = array();
 231
 232                         $result = db_query($link, "SELECT reg_exp,
 233                                 (SELECT name FROM ttrss_filter_types
 234                                         WHERE id = filter_type) as name,
 235                                 (SELECT name FROM ttrss_filter_actions
 236                                         WHERE id = action_id) as action
 237                                 FROM ttrss_filters WHERE
 238                                 owner_uid = $owner_uid AND
 239                                 (feed_id IS NULL OR feed_id = '$feed')");
 240
 241                         while ($line = db_fetch_assoc($result)) {
 242                                 if (!$filters[$line["name"]]) $filters[$line["name"]] = array();
 243
 244                                 $filter["reg_exp"] = $line["reg_exp"];
 245                                 $filter["action"] = $line["action"];
 246
 247                                 array_push($filters[$line["name"]], $filter);
 248                         }
 249
 250                         $iterator = $rss->items;
 251
 252                         if (!$iterator) $iterator = $rss->entries;
 253                         if (!$iterator) $iterator = $rss;
 254
 255                         foreach ($iterator as $item) {
 256
 257                                 $entry_guid = $item["id"];
 258
 259                                 if (!$entry_guid) $entry_guid = $item["guid"];
 260                                 if (!$entry_guid) $entry_guid = $item["link"];
 261
 262                                 if (!$entry_guid) continue;
 263
 264                                 $entry_timestamp = "";
 265
 266                                 $rss_2_date = $item['pubdate'];
 267                                 $rss_1_date = $item['dc']['date'];
 268                                 $atom_date = $item['issued'];
 269                                 if (!$atom_date) $atom_date = $item['updated'];
 270
 271                                 if ($atom_date != "") $entry_timestamp = parse_w3cdtf($atom_date);
 272                                 if ($rss_1_date != "") $entry_timestamp = parse_w3cdtf($rss_1_date);
 273                                 if ($rss_2_date != "") $entry_timestamp = strtotime($rss_2_date);
 274
 275                                 if ($entry_timestamp == "") {
 276                                         $entry_timestamp = time();
 277                                         $no_orig_date = 'true';
 278                                 } else {
 279                                         $no_orig_date = 'false';
 280                                 }
 281
 282                                 $entry_timestamp_fmt = strftime("%Y/%m/%d %H:%M:%S", $entry_timestamp);
 283
 284                                 $entry_title = $item["title"];
 285
 286                                 // strange Magpie workaround
 287                                 $entry_link = $item["link_"];
 288                                 if (!$entry_link) $entry_link = $item["link"];
 289
 290                                 if (!$entry_title) continue;
 291                                 if (!$entry_link) continue;
 292
 293                                 $entry_content = $item["content:escaped"];
 294
 295                                 if (!$entry_content) $entry_content = $item["content:encoded"];
 296                                 if (!$entry_content) $entry_content = $item["content"];
 297                                 if (!$entry_content) $entry_content = $item["summary"];
 298                                 if (!$entry_content) $entry_content = $item["description"];
 299
 300 //                              if (!$entry_content) continue;
 301
 302                                 // WTF
 303                                 if (is_array($entry_content)) {
 304                                         $entry_content = $entry_content["encoded"];
 305                                         if (!$entry_content) $entry_content = $entry_content["escaped"];
 306                                 }
 307
 308 //                              print_r($item);
 309 //                              print_r(htmlspecialchars($entry_content));
 310 //                              print "<br>";
 311
 312                                 $entry_content_unescaped = $entry_content;
 313                                 $content_hash = "SHA1:" . sha1(strip_tags($entry_content));
 314
 315                                 $entry_comments = $item["comments"];
 316
 317                                 $entry_guid = db_escape_string($entry_guid);
 318
 319                                 $result = db_query($link, "SELECT id FROM       ttrss_entries
 320                                         WHERE guid = '$entry_guid'");
 321
 322                                 $entry_content = db_escape_string($entry_content);
 323                                 $entry_title = db_escape_string($entry_title);
 324                                 $entry_link = db_escape_string($entry_link);
 325                                 $entry_comments = db_escape_string($entry_comments);
 326
 327                                 $num_comments = db_escape_string($item["slash"]["comments"]);
 328
 329                                 if (!$num_comments) $num_comments = 0;
 330
 331                                 if (db_num_rows($result) == 0) {
 332
 333                                         // base post entry does not exist, create it
 334
 335                                         $result = db_query($link,
 336                                                 "INSERT INTO ttrss_entries
 337                                                         (title,
 338                                                         guid,
 339                                                         link,
 340                                                         updated,
 341                                                         content,
 342                                                         content_hash,
 343                                                         no_orig_date,
 344                                                         date_entered,
 345                                                         comments,
 346                                                         num_comments)
 347                                                 VALUES
 348                                                         ('$entry_title',
 349                                                         '$entry_guid',
 350                                                         '$entry_link',
 351                                                         '$entry_timestamp_fmt',
 352                                                         '$entry_content',
 353                                                         '$content_hash',
 354                                                         $no_orig_date,
 355                                                         NOW(),
 356                                                         '$entry_comments',
 357                                                         '$num_comments')");
 358                                 }
 359
 360                                 // now it should exist, if not - bad luck then
 361
 362                                 $result = db_query($link, "SELECT
 363                                                 id,content_hash,no_orig_date,title,
 364                                                 substring(updated,1,19) as updated,
 365                                                 num_comments
 366                                         FROM
 367                                                 ttrss_entries
 368                                         WHERE guid = '$entry_guid'");
 369
 370                                 if (db_num_rows($result) == 1) {
 371
 372                                         // this will be used below in update handler
 373                                         $orig_content_hash = db_fetch_result($result, 0, "content_hash");
 374                                         $orig_title = db_fetch_result($result, 0, "title");
 375                                         $orig_num_comments = db_fetch_result($result, 0, "num_comments");
 376
 377                                         $ref_id = db_fetch_result($result, 0, "id");
 378
 379                                         // check for user post link to main table
 380
 381                                         // do we allow duplicate posts with same GUID in different feeds?
 382                                         if (get_pref($link, "ALLOW_DUPLICATE_POSTS", $owner_uid)) {
 383                                                 $dupcheck_qpart = "AND feed_id = '$feed'";
 384                                         } else {
 385                                                 $dupcheck_qpart = "";
 386                                         }
 387
 388 //                                      error_reporting(0);
 389
 390                                         $filter_name = get_filter_name($entry_title, $entry_content,
 391                                                 $entry_link, $filters);
 392
 393                                         if ($filter_name == "filter") {
 394                                                 continue;
 395                                         }
 396
 397 //                                      error_reporting (DEFAULT_ERROR_LEVEL);
 398
 399                                         $result = db_query($link,
 400                                                 "SELECT ref_id FROM ttrss_user_entries WHERE
 401                                                         ref_id = '$ref_id' AND owner_uid = '$owner_uid'
 402                                                         $dupcheck_qpart");
 403
 404                                         // okay it doesn't exist - create user entry
 405                                         if (db_num_rows($result) == 0) {
 406
 407                                                 if ($filter_name != 'catchup') {
 408                                                         $unread = 'true';
 409                                                         $last_read_qpart = 'NULL';
 410                                                 } else {
 411                                                         $unread = 'false';
 412                                                         $last_read_qpart = 'NOW()';
 413                                                 }
 414
 415                                                 $result = db_query($link,
 416                                                         "INSERT INTO ttrss_user_entries
 417                                                                 (ref_id, owner_uid, feed_id, unread, last_read)
 418                                                         VALUES ('$ref_id', '$owner_uid', '$feed', $unread,
 419                                                                 $last_read_qpart)");
 420                                         }
 421
 422                                         $post_needs_update = false;
 423
 424                                         if (get_pref($link, "UPDATE_POST_ON_CHECKSUM_CHANGE", $owner_uid) &&
 425                                                 ($content_hash != $orig_content_hash)) {
 426                                                 $post_needs_update = true;
 427                                         }
 428
 429                                         if ($orig_title != $entry_title) {
 430                                                 $post_needs_update = true;
 431                                         }
 432
 433                                         if ($orig_num_comments != $num_comments) {
 434                                                 $post_needs_update = true;
 435                                         }
 436
 437 //                                      this doesn't seem to be very reliable
 438 //
 439 //                                      if ($orig_timestamp != $entry_timestamp && !$orig_no_orig_date) {
 440 //                                              $post_needs_update = true;
 441 //                                      }
 442
 443                                         // if post needs update, update it and mark all user entries
 444                                         // linking to this post as updated
 445                                         if ($post_needs_update) {
 446
 447 //                                              print "<!-- post $orig_title needs update : $post_needs_update -->";
 448
 449                                                 db_query($link, "UPDATE ttrss_entries
 450                                                         SET title = '$entry_title', content = '$entry_content',
 451                                                                 num_comments = '$num_comments'
 452                                                         WHERE id = '$ref_id'");
 453
 454                                                 db_query($link, "UPDATE ttrss_user_entries
 455                                                         SET last_read = null WHERE ref_id = '$ref_id' AND unread = false");
 456
 457                                         }
 458                                 }
 459
 460                                 /* taaaags */
 461                                 // <a href="http://technorati.com/tag/Xorg" rel="tag">Xorg</a>, //
 462
 463                                 $entry_tags = null;
 464
 465                                 preg_match_all("/<a.*?href=.http:\/\/.*?technorati.com\/tag\/([^\"\'>]+)/i",
 466                                         $entry_content_unescaped, $entry_tags);
 467
 468 //                              print "<br>$entry_title : $entry_content_unescaped<br>";
 469 //                              print_r($entry_tags);
 470 //                              print "<br>";
 471
 472                                 $entry_tags = $entry_tags[1];
 473
 474                                 if (count($entry_tags) > 0) {
 475
 476                                         $result = db_query($link, "SELECT id,int_id
 477                                                 FROM ttrss_entries,ttrss_user_entries
 478                                                 WHERE guid = '$entry_guid'
 479                                                 AND feed_id = '$feed' AND ref_id = id
 480                                                 AND owner_uid = '$owner_uid'");
 481
 482                                         if (db_num_rows($result) == 1) {
 483
 484                                                 $entry_id = db_fetch_result($result, 0, "id");
 485                                                 $entry_int_id = db_fetch_result($result, 0, "int_id");
 486
 487                                                 foreach ($entry_tags as $tag) {
 488                                                         $tag = db_escape_string(strtolower($tag));
 489
 490                                                         $tag = str_replace("+", " ", $tag);
 491                                                         $tag = str_replace("technorati tag: ", "", $tag);
 492
 493                                                         $result = db_query($link, "SELECT id FROM ttrss_tags
 494                                                                 WHERE tag_name = '$tag' AND post_int_id = '$entry_int_id' AND
 495                                                                 owner_uid = '$owner_uid' LIMIT 1");
 496
 497         //                                              print db_fetch_result($result, 0, "id");
 498
 499                                                         if ($result && db_num_rows($result) == 0) {
 500
 501         //                                                      print "tagging $entry_id as $tag<br>";
 502
 503                                                                 db_query($link, "INSERT INTO ttrss_tags
 504                                                                         (owner_uid,tag_name,post_int_id)
 505                                                                         VALUES ('$owner_uid','$tag', '$entry_int_id')");
 506                                                         }
 507                                                 }
 508                                         }
 509                                 }
 510                         }
 511
 512                         db_query($link, "UPDATE ttrss_feeds
 513                                 SET last_updated = NOW(), last_error = '' WHERE id = '$feed'");
 514
 515                         db_query($link, "COMMIT");
 516
 517                 } else {
 518                         $error_msg = db_escape_string(magpie_error());
 519                         db_query($link,
 520                                 "UPDATE ttrss_feeds SET last_error = '$error_msg',
 521                                         last_updated = NOW() WHERE id = '$feed'");
 522                 }
 523
 524         }
 525
 526         function print_select($id, $default, $values, $attributes = "") {
 527                 print "<select id=\"$id\" $attributes>";
 528                 foreach ($values as $v) {
 529                         if ($v == $default)
 530                                 $sel = " selected";
 531                          else
 532                                 $sel = "";
 533
 534                         print "<option$sel>$v</option>";
 535                 }
 536                 print "</select>";
 537         }
 538
 539         function get_filter_name($title, $content, $link, $filters) {
 540
 541                 if ($filters["title"]) {
 542                         foreach ($filters["title"] as $filter) {
 543                                 $reg_exp = $filter["reg_exp"];
 544                                 if (preg_match("/$reg_exp/i", $title)) {
 545                                         return $filter["action"];
 546                                 }
 547                         }
 548                 }
 549
 550                 if ($filters["content"]) {
 551                         foreach ($filters["content"] as $filter) {
 552                                 $reg_exp = $filter["reg_exp"];
 553                                 if (preg_match("/$reg_exp/i", $content)) {
 554                                         return $filter["action"];
 555                                 }
 556                         }
 557                 }
 558
 559                 if ($filters["both"]) {
 560                         foreach ($filters["both"] as $filter) {
 561                                 $reg_exp = $filter["reg_exp"];
 562                                 if (preg_match("/$reg_exp/i", $title) ||
 563                                         preg_match("/$reg_exp/i", $content)) {
 564                                         return $filter["action"];
 565                                 }
 566                         }
 567                 }
 568
 569                 if ($filters["link"]) {
 570                         $reg_exp = $filter["reg_exp"];
 571                         foreach ($filters["link"] as $filter) {
 572                                 $reg_exp = $filter["reg_exp"];
 573                                 if (preg_match("/$reg_exp/i", $link)) {
 574                                         return $filter["action"];
 575                                 }
 576                         }
 577                 }
 578
 579                 return false;
 580         }
 581
 582         function printFeedEntry($feed_id, $class, $feed_title, $unread, $icon_file, $link) {
 583
 584                 if (file_exists($icon_file) && filesize($icon_file) > 0) {
 585                                 $feed_icon = "<img src=\"$icon_file\">";
 586                 } else {
 587                         $feed_icon = "<img src=\"images/blank_icon.gif\">";
 588                 }
 589
 590                 $feed = "<a href=\"javascript:viewfeed('$feed_id', 0);\">$feed_title</a>";
 591
 592                 print "<li id=\"FEEDR-$feed_id\" class=\"$class\">";
 593                 if (get_pref($link, 'ENABLE_FEED_ICONS')) {
 594                         print "$feed_icon";
 595                 }
 596
 597                 print "<span id=\"FEEDN-$feed_id\">$feed</span>";
 598
 599                 if ($unread != 0) {
 600                         $fctr_class = "";
 601                 } else {
 602                         $fctr_class = "class=\"invisible\"";
 603                 }
 604
 605                 print "<span $fctr_class id=\"FEEDCTR-$feed_id\">
 606                          (<span id=\"FEEDU-$feed_id\">$unread</span>)</span>";
 607
 608                 print "</li>";
 609
 610         }
 611
 612         function getmicrotime() {
 613                 list($usec, $sec) = explode(" ",microtime());
 614                 return ((float)$usec + (float)$sec);
 615         }
 616
 617         function print_radio($id, $default, $values, $attributes = "") {
 618                 foreach ($values as $v) {
 619
 620                         if ($v == $default)
 621                                 $sel = "checked";
 622                          else
 623                                 $sel = "";
 624
 625                         if ($v == "Yes") {
 626                                 $sel .= " value=\"1\"";
 627                         } else {
 628                                 $sel .= " value=\"0\"";
 629                         }
 630
 631                         print "<input type=\"radio\" $sel $attributes name=\"$id\">&nbsp;$v&nbsp;";
 632
 633                 }
 634         }
 635
 636         function initialize_user_prefs($link, $uid) {
 637
 638                 $uid = db_escape_string($uid);
 639
 640                 db_query($link, "BEGIN");
 641
 642                 $result = db_query($link, "SELECT pref_name,def_value FROM ttrss_prefs");
 643
 644                 $u_result = db_query($link, "SELECT pref_name
 645                         FROM ttrss_user_prefs WHERE owner_uid = '$uid'");
 646
 647                 $active_prefs = array();
 648
 649                 while ($line = db_fetch_assoc($u_result)) {
 650                         array_push($active_prefs, $line["pref_name"]);
 651                 }
 652
 653                 while ($line = db_fetch_assoc($result)) {
 654                         if (array_search($line["pref_name"], $active_prefs) === FALSE) {
 655 //                              print "adding " . $line["pref_name"] . "<br>";
 656
 657                                 db_query($link, "INSERT INTO ttrss_user_prefs
 658                                         (owner_uid,pref_name,value) VALUES
 659                                         ('$uid', '".$line["pref_name"]."','".$line["def_value"]."')");
 660
 661                         }
 662                 }
 663
 664                 db_query($link, "COMMIT");
 665
 666         }
 667
 668         function authenticate_user($link, $login, $password) {
 669
 670                 $pwd_hash = 'SHA1:' . sha1($password);
 671
 672                 $result = db_query($link, "SELECT id,login,access_level FROM ttrss_users WHERE
 673                         login = '$login' AND (pwd_hash = '$password' OR pwd_hash = '$pwd_hash')");
 674
 675                 if (db_num_rows($result) == 1) {
 676                         $_SESSION["uid"] = db_fetch_result($result, 0, "id");
 677                         $_SESSION["name"] = db_fetch_result($result, 0, "login");
 678                         $_SESSION["access_level"] = db_fetch_result($result, 0, "access_level");
 679
 680                         db_query($link, "UPDATE ttrss_users SET last_login = NOW() WHERE id = " .
 681                                 $_SESSION["uid"]);
 682
 683                         $user_theme = get_user_theme_path($link);
 684
 685                         $_SESSION["theme"] = $user_theme;
 686
 687                         initialize_user_prefs($link, $_SESSION["uid"]);
 688
 689                         return true;
 690                 }
 691
 692                 return false;
 693
 694         }
 695
 696         function make_password($length = 8) {
 697
 698                 $password = "";
 699                 $possible = "0123456789bcdfghjkmnpqrstvwxyz";
 700
 701                 $i = 0;
 702
 703                 while ($i < $length) {
 704                         $char = substr($possible, mt_rand(0, strlen($possible)-1), 1);
 705
 706                         if (!strstr($password, $char)) {
 707                                 $password .= $char;
 708                                 $i++;
 709                         }
 710                 }
 711                 return $password;
 712         }
 713
 714         // this is called after user is created to initialize default feeds, labels
 715         // or whatever else
 716
 717         // user preferences are checked on every login, not here
 718
 719         function initialize_user($link, $uid) {
 720
 721                 db_query($link, "insert into ttrss_labels (owner_uid,sql_exp,description)
 722                         values ('$uid','unread = true', 'Unread articles')");
 723
 724                 db_query($link, "insert into ttrss_labels (owner_uid,sql_exp,description)
 725                         values ('$uid','last_read is null and unread = false', 'Updated articles')");
 726
 727                 db_query($link, "insert into ttrss_feeds (owner_uid,title,feed_url)
 728                         values ('$uid', 'Tiny Tiny RSS: New Releases',
 729                         'http://tt-rss.spb.ru/releases.rss')");
 730
 731         }
 732
 733         function logout_user() {
 734                 session_destroy();
 735         }
 736
 737         function get_script_urlpath() {
 738                 return preg_replace('/\/[^\/]*$/', "", $_SERVER["REQUEST_URI"]);
 739         }
 740
 741         function get_login_redirect() {
 742                 $server = $_SERVER["SERVER_NAME"];
 743
 744                 if (ENABLE_LOGIN_SSL) {
 745                         $protocol = "https";
 746                 } else {
 747                         $protocol = "http";
 748                 }
 749
 750                 $url_path = get_script_urlpath();
 751
 752                 $redirect_uri = "$protocol://$server$url_path/login.php";
 753
 754                 return $redirect_uri;
 755         }
 756
 757         function login_sequence($link) {
 758                 if (!SINGLE_USER_MODE) {
 759
 760                         if (!USE_HTTP_AUTH) {
 761                                 if (!$_SESSION["uid"]) {
 762                                         $redirect_uri = get_login_redirect();
 763                                         $return_to = preg_replace('/.*?\//', '', $_SERVER["REQUEST_URI"]);
 764                                         header("Location: $redirect_uri?rt=$return_to");
 765                                         exit;
 766                                 }
 767                         } else {
 768                                 if (!$_SESSION["uid"]) {
 769                                         if (!$_SERVER["PHP_AUTH_USER"]) {
 770
 771                                                 header('WWW-Authenticate: Basic realm="Tiny Tiny RSS"');
 772                                                 header('HTTP/1.0 401 Unauthorized');
 773                                                 exit;
 774
 775                                         } else {
 776                                                 $auth_result = authenticate_user($link,
 777                                                         $_SERVER["PHP_AUTH_USER"], $_SERVER["PHP_AUTH_PW"]);
 778
 779                                                 if (!$auth_result) {
 780                                                         header('WWW-Authenticate: Basic realm="Tiny Tiny RSS"');
 781                                                         header('HTTP/1.0 401 Unauthorized');
 782                                                         exit;
 783                                                 }
 784                                         }
 785                                 }
 786                         }
 787                 } else {
 788                         $_SESSION["uid"] = 1;
 789                         $_SESSION["name"] = "admin";
 790                         initialize_user_prefs($link, 1);
 791                 }
 792         }
 793
 794         function truncate_string($str, $max_len) {
 795                 if (strlen($str) > $max_len) {
 796                         return substr($str, 0, $max_len) . "...";
 797                 } else {
 798                         return $str;
 799                 }
 800         }
 801
 802         function get_user_theme_path($link) {
 803                 $result = db_query($link, "SELECT theme_path FROM ttrss_themes
 804                         WHERE id = (SELECT theme_id FROM ttrss_users
 805                                 WHERE id = " . $_SESSION["uid"] . ")");
 806                 if (db_num_rows($result) != 0) {
 807                         return db_fetch_result($result, 0, "theme_path");
 808                 } else {
 809                         return null;
 810                 }
 811         }
 812
 813         function smart_date_time($timestamp) {
 814                 if (date("Y.m.d", $timestamp) == date("Y.m.d")) {
 815                         return date("G:i", $timestamp);
 816                 } else if (date("Y", $timestamp) == date("Y")) {
 817                         return date("M d, G:i", $timestamp);
 818                 } else {
 819                         return date("Y/m/d G:i");
 820                 }
 821         }
 822
 823         function smart_date($timestamp) {
 824                 if (date("Y.m.d", $timestamp) == date("Y.m.d")) {
 825                         return "Today";
 826                 } else if (date("Y", $timestamp) == date("Y")) {
 827                         return date("D m", $timestamp);
 828                 } else {
 829                         return date("Y/m/d");
 830                 }
 831         }
 832
 833         function sql_bool_to_string($s) {
 834                 if ($s == "t" || $s == "1") {
 835                         return "true";
 836                 } else {
 837                         return "false";
 838                 }
 839         }
 840
 841         function toggleEvenOdd($a) {
 842                 if ($a == "even")
 843                         return "odd";
 844                 else
 845                         return "even";
 846         }
 847 ?>