functions.php

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