inc/poche/Database.class.php

   1 <?php
   2 /**
   3  * wallabag, self hostable application allowing you to not miss any content anymore
   4  *
   5  * @category   wallabag
   6  * @author     Nicolas Lœuillet <nicolas@loeuillet.org>
   7  * @copyright  2013
   8  * @license    http://opensource.org/licenses/MIT see COPYING file
   9  */
  10
  11 class Database {
  12
  13     var $handle;
  14     private $order = array (
  15         'ia' => 'ORDER BY entries.id',
  16         'id' => 'ORDER BY entries.id DESC',
  17         'ta' => 'ORDER BY lower(entries.title)',
  18         'td' => 'ORDER BY lower(entries.title) DESC',
  19         'default' => 'ORDER BY entries.id'
  20     );
  21
  22     function __construct()
  23     {
  24         switch (STORAGE) {
  25             case 'sqlite':
  26                 // Check if /db is writeable
  27                 if ( !is_writable(STORAGE_SQLITE) || !is_writable(dirname(STORAGE_SQLITE))) {
  28                         die('An error occured: "db" directory must be writeable for your web server user!');
  29                 }
  30                 $db_path = 'sqlite:' . STORAGE_SQLITE;
  31                 $this->handle = new PDO($db_path);
  32                 break;
  33             case 'mysql':
  34                 if (MYSQL_USE_UTF8MB4) {
  35                     $db_path = 'mysql:host=' . STORAGE_SERVER . ';dbname=' . STORAGE_DB . ';charset=utf8mb4';
  36                     $this->handle = new PDO($db_path, STORAGE_USER, STORAGE_PASSWORD, array(
  37                         PDO::MYSQL_ATTR_INIT_COMMAND => 'SET NAMES utf8mb4',
  38                     ));
  39                 } else {
  40                     $db_path = 'mysql:host=' . STORAGE_SERVER . ';dbname=' . STORAGE_DB;
  41                     $this->handle = new PDO($db_path, STORAGE_USER, STORAGE_PASSWORD);
  42                 }
  43                 break;
  44             case 'postgres':
  45                 $db_path = 'pgsql:host=' . STORAGE_SERVER . ';dbname=' . STORAGE_DB;
  46                 $this->handle = new PDO($db_path, STORAGE_USER, STORAGE_PASSWORD);
  47                 break;
  48             default:
  49                 die(STORAGE . ' is not a recognised database system !');
  50         }
  51
  52         $this->handle->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
  53         $this->_checkTags();
  54         Tools::logm('storage type ' . STORAGE);
  55     }
  56
  57     private function getHandle()
  58     {
  59         return $this->handle;
  60     }
  61
  62     private function _checkTags()
  63     {
  64
  65         if (STORAGE == 'sqlite') {
  66             $sql = '
  67                 CREATE TABLE IF NOT EXISTS tags (
  68                     id INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL UNIQUE,
  69                     value TEXT
  70                 )';
  71         }
  72         elseif(STORAGE == 'mysql') {
  73             $sql = '
  74                 CREATE TABLE IF NOT EXISTS `tags` (
  75                   `id` int(11) NOT NULL AUTO_INCREMENT,
  76                   `value` varchar(255) NOT NULL,
  77                   PRIMARY KEY (`id`)
  78                 ) ENGINE=InnoDB DEFAULT CHARSET=utf8;
  79             ';
  80         }
  81         else {
  82             $sql = '
  83                 CREATE TABLE IF NOT EXISTS tags (
  84                   id bigserial primary key,
  85                   value varchar(255) NOT NULL
  86                 );
  87             ';
  88         }
  89
  90         $query = $this->executeQuery($sql, array());
  91
  92         if (STORAGE == 'sqlite') {
  93             $sql = '
  94                 CREATE TABLE IF NOT EXISTS tags_entries (
  95                     id INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL UNIQUE,
  96                     entry_id INTEGER,
  97                     tag_id INTEGER,
  98                     FOREIGN KEY(entry_id) REFERENCES entries(id) ON DELETE CASCADE,
  99                     FOREIGN KEY(tag_id) REFERENCES tags(id) ON DELETE CASCADE
 100                 )';
 101         }
 102         elseif(STORAGE == 'mysql') {
 103             $sql = '
 104                 CREATE TABLE IF NOT EXISTS `tags_entries` (
 105                   `id` int(11) NOT NULL AUTO_INCREMENT,
 106                   `entry_id` int(11) NOT NULL,
 107                   `tag_id` int(11) NOT NULL,
 108                   FOREIGN KEY(entry_id) REFERENCES entries(id) ON DELETE CASCADE,
 109                   FOREIGN KEY(tag_id) REFERENCES tags(id) ON DELETE CASCADE,
 110                   PRIMARY KEY (`id`)
 111                 ) ENGINE=InnoDB  DEFAULT CHARSET=utf8;
 112             ';
 113         }
 114         else {
 115             $sql = '
 116                 CREATE TABLE IF NOT EXISTS tags_entries (
 117                   id bigserial primary key,
 118                   entry_id integer NOT NULL,
 119                   tag_id integer NOT NULL
 120                 )
 121             ';
 122         }
 123
 124         $query = $this->executeQuery($sql, array());
 125     }
 126
 127     public function install($login, $password, $email = '')
 128     {
 129         $sql = 'INSERT INTO users ( username, password, name, email) VALUES (?, ?, ?, ?)';
 130         $params = array($login, $password, $login, $email);
 131         $query = $this->executeQuery($sql, $params);
 132
 133         $sequence = '';
 134         if (STORAGE == 'postgres') {
 135             $sequence = 'users_id_seq';
 136         }
 137
 138         $id_user = intval($this->getLastId($sequence));
 139
 140         $sql = 'INSERT INTO users_config ( user_id, name, value ) VALUES (?, ?, ?)';
 141         $params = array($id_user, 'pager', PAGINATION);
 142         $query = $this->executeQuery($sql, $params);
 143
 144         $sql = 'INSERT INTO users_config ( user_id, name, value ) VALUES (?, ?, ?)';
 145         $params = array($id_user, 'language', LANG);
 146         $query = $this->executeQuery($sql, $params);
 147
 148         $sql = 'INSERT INTO users_config ( user_id, name, value ) VALUES (?, ?, ?)';
 149         $params = array($id_user, 'theme', DEFAULT_THEME);
 150         $query = $this->executeQuery($sql, $params);
 151
 152         return TRUE;
 153     }
 154
 155     public function getConfigUser($id)
 156     {
 157         $sql = "SELECT * FROM users_config WHERE user_id = ?";
 158         $query = $this->executeQuery($sql, array($id));
 159         $result = $query->fetchAll();
 160         $user_config = array();
 161
 162         foreach ($result as $key => $value) {
 163             $user_config[$value['name']] = $value['value'];
 164         }
 165
 166         return $user_config;
 167     }
 168
 169     public function userExists($username)
 170     {
 171         $sql = "SELECT * FROM users WHERE username=?";
 172         $query = $this->executeQuery($sql, array($username));
 173         $login = $query->fetchAll();
 174         if (isset($login[0])) {
 175             return true;
 176         } else {
 177             return false;
 178         }
 179     }
 180
 181     public function login($username, $password, $isauthenticated = FALSE)
 182     {
 183         if ($isauthenticated) {
 184             $sql = "SELECT * FROM users WHERE username=?";
 185             $query = $this->executeQuery($sql, array($username));
 186         } else {
 187             $sql = "SELECT * FROM users WHERE username=? AND password=?";
 188             $query = $this->executeQuery($sql, array($username, $password));
 189         }
 190         $login = $query->fetchAll();
 191
 192         $user = array();
 193         if (isset($login[0])) {
 194             $user['id'] = $login[0]['id'];
 195             $user['username'] = $login[0]['username'];
 196             $user['password'] = $login[0]['password'];
 197             $user['name'] = $login[0]['name'];
 198             $user['email'] = $login[0]['email'];
 199             $user['config'] = $this->getConfigUser($login[0]['id']);
 200         }
 201
 202         return $user;
 203     }
 204
 205     public function updatePassword($userId, $password)
 206     {
 207         $sql_update = "UPDATE users SET password=? WHERE id=?";
 208         $params_update = array($password, $userId);
 209         $query = $this->executeQuery($sql_update, $params_update);
 210     }
 211
 212     public function updateUserConfig($userId, $key, $value)
 213     {
 214         $config = $this->getConfigUser($userId);
 215
 216         if (! isset($config[$key])) {
 217             $sql = "INSERT INTO users_config (value, user_id, name) VALUES (?, ?, ?)";
 218         }
 219         else {
 220             $sql = "UPDATE users_config SET value=? WHERE user_id=? AND name=?";
 221         }
 222
 223         $params = array($value, $userId, $key);
 224         $query = $this->executeQuery($sql, $params);
 225     }
 226
 227     private function executeQuery($sql, $params)
 228     {
 229         try
 230         {
 231             $query = $this->getHandle()->prepare($sql);
 232             $query->execute($params);
 233             return $query;
 234         }
 235         catch (Exception $e)
 236         {
 237             Tools::logm('execute query error : '.$e->getMessage());
 238             return FALSE;
 239         }
 240     }
 241
 242     public function listUsers($username = NULL)
 243     {
 244         $sql = 'SELECT count(*) FROM users'.( $username ? ' WHERE username=?' : '');
 245         $query = $this->executeQuery($sql, ( $username ? array($username) : array()));
 246         list($count) = $query->fetch();
 247         return $count;
 248     }
 249
 250     public function getUserPassword($userID)
 251     {
 252         $sql = "SELECT * FROM users WHERE id=?";
 253         $query = $this->executeQuery($sql, array($userID));
 254         $password = $query->fetchAll();
 255         return isset($password[0]['password']) ? $password[0]['password'] : null;
 256     }
 257
 258     public function deleteUserConfig($userID)
 259     {
 260         $sql_action = 'DELETE from users_config WHERE user_id=?';
 261         $params_action = array($userID);
 262         $query = $this->executeQuery($sql_action, $params_action);
 263         return $query;
 264     }
 265
 266     public function deleteTagsEntriesAndEntries($userID)
 267     {
 268         $entries = $this->retrieveAll($userID);
 269         foreach($entries as $entryid) {
 270             $tags = $this->retrieveTagsByEntry($entryid);
 271             foreach($tags as $tag) {
 272                 $this->removeTagForEntry($entryid,$tags);
 273             }
 274             $this->deleteById($entryid,$userID);
 275         }
 276     }
 277
 278     public function deleteUser($userID)
 279     {
 280         $sql_action = 'DELETE from users WHERE id=?';
 281         $params_action = array($userID);
 282         $query = $this->executeQuery($sql_action, $params_action);
 283     }
 284
 285     public function updateContentAndTitle($id, $title, $body, $user_id)
 286     {
 287         $sql_action = 'UPDATE entries SET content = ?, title = ? WHERE id=? AND user_id=?';
 288         $params_action = array($body, $title, $id, $user_id);
 289         $query = $this->executeQuery($sql_action, $params_action);
 290         return $query;
 291     }
 292
 293     public function retrieveUnfetchedEntries($user_id, $limit)
 294     {
 295
 296         $sql_limit = "LIMIT 0,".$limit;
 297         if (STORAGE == 'postgres') {
 298             $sql_limit = "LIMIT ".$limit." OFFSET 0";
 299         }
 300
 301         $sql        = "SELECT * FROM entries WHERE (content = '' OR content IS NULL) AND title LIKE '%Import%' AND user_id=? ORDER BY id " . $sql_limit;
 302         $query      = $this->executeQuery($sql, array($user_id));
 303         $entries    = $query->fetchAll();
 304
 305         return $entries;
 306     }
 307
 308     public function retrieveUnfetchedEntriesCount($user_id)
 309     {
 310       $sql        = "SELECT count(*) FROM entries WHERE (content = '' OR content IS NULL) AND title LIKE '%Import%' AND user_id=?";
 311       $query      = $this->executeQuery($sql, array($user_id));
 312       list($count) = $query->fetch();
 313
 314       return $count;
 315     }
 316
 317     public function retrieveAll($user_id)
 318     {
 319         $sql        = "SELECT * FROM entries WHERE user_id=? ORDER BY id";
 320         $query      = $this->executeQuery($sql, array($user_id));
 321         $entries    = $query->fetchAll();
 322
 323         return $entries;
 324     }
 325
 326     public function retrieveAllWithTags($user_id)
 327     {
 328         $entries = $this->retrieveAll($user_id);
 329         $count = count($entries);
 330         for ($i = 0; $i < $count; $i++) {
 331           $tag_entries = $this->retrieveTagsByEntry($entries[$i]['id']);
 332           $tags = [];
 333           foreach ($tag_entries as $tag) {
 334             $tags[] = $tag[1];
 335           }
 336           $entries[$i]['tags'] = implode(',', $tags);
 337         }
 338         return $entries;
 339     }
 340
 341     public function retrieveOneById($id, $user_id)
 342     {
 343         $entry  = NULL;
 344         $sql    = "SELECT * FROM entries WHERE id=? AND user_id=?";
 345         $params = array(intval($id), $user_id);
 346         $query  = $this->executeQuery($sql, $params);
 347         $entry  = $query->fetchAll();
 348
 349         return isset($entry[0]) ? $entry[0] : null;
 350     }
 351
 352     public function retrieveOneByURL($url, $user_id)
 353     {
 354         $entry  = NULL;
 355         $sql    = "SELECT * FROM entries WHERE url=? AND user_id=?";
 356         $params = array($url, $user_id);
 357         $query  = $this->executeQuery($sql, $params);
 358         $entry  = $query->fetchAll();
 359
 360         return isset($entry[0]) ? $entry[0] : null;
 361     }
 362
 363     public function reassignTags($old_entry_id, $new_entry_id)
 364     {
 365         $sql    = "UPDATE tags_entries SET entry_id=? WHERE entry_id=?";
 366         $params = array($new_entry_id, $old_entry_id);
 367         $query  = $this->executeQuery($sql, $params);
 368     }
 369
 370     public function getEntriesByView($view, $user_id, $limit = '', $tag_id = 0)
 371     {
 372         switch ($view) {
 373             case 'archive':
 374                 $sql    = "SELECT * FROM entries WHERE user_id=? AND is_read=? ";
 375                 $params = array($user_id, 1);
 376                 break;
 377             case 'fav' :
 378                 $sql    = "SELECT * FROM entries WHERE user_id=? AND is_fav=? ";
 379                 $params = array($user_id, 1);
 380                 break;
 381             case 'tag' :
 382                 $sql    = "SELECT entries.* FROM entries
 383                 LEFT JOIN tags_entries ON tags_entries.entry_id=entries.id
 384                 WHERE entries.user_id=? AND tags_entries.tag_id = ? ";
 385                 $params = array($user_id, $tag_id);
 386                 break;
 387             default:
 388                 $sql    = "SELECT * FROM entries WHERE user_id=? AND is_read=? ";
 389                 $params = array($user_id, 0);
 390                 break;
 391         }
 392
 393                 $sql .= $this->getEntriesOrder().' ' . $limit;
 394
 395                 $query = $this->executeQuery($sql, $params);
 396                 $entries = $query->fetchAll();
 397
 398                 return $entries;
 399     }
 400
 401     public function getEntriesByViewCount($view, $user_id, $tag_id = 0)
 402     {
 403         switch ($view) {
 404             case 'archive':
 405                     $sql    = "SELECT count(*) FROM entries WHERE user_id=? AND is_read=? ";
 406                 $params = array($user_id, 1);
 407                 break;
 408             case 'fav' :
 409                     $sql    = "SELECT count(*) FROM entries WHERE user_id=? AND is_fav=? ";
 410                 $params = array($user_id, 1);
 411                 break;
 412             case 'tag' :
 413                 $sql    = "SELECT count(*) FROM entries
 414                     LEFT JOIN tags_entries ON tags_entries.entry_id=entries.id
 415                     WHERE entries.user_id=? AND tags_entries.tag_id = ? ";
 416                 $params = array($user_id, $tag_id);
 417                 break;
 418             default:
 419                 $sql    = "SELECT count(*) FROM entries WHERE user_id=? AND is_read=? ";
 420                 $params = array($user_id, 0);
 421                 break;
 422         }
 423
 424         $query = $this->executeQuery($sql, $params);
 425         list($count) = $query->fetch();
 426
 427         return $count;
 428     }
 429     public function getRandomId($user_id, $view) {
 430         $random = (STORAGE == 'mysql') ? 'RAND()' : 'RANDOM()';
 431         switch ($view) {
 432             case 'archive':
 433                 $sql = "SELECT id FROM entries WHERE user_id=? AND is_read=? ORDER BY ". $random . " LIMIT 1";
 434                 $params = array($user_id,1);
 435                 break;
 436             case 'fav':
 437                 $sql = "SELECT id FROM entries WHERE user_id=? AND is_fav=? ORDER BY ". $random . " LIMIT 1";
 438                 $params = array($user_id,1);
 439                 break;
 440             default:
 441                 $sql = "SELECT id FROM entries WHERE user_id=? AND is_read=? ORDER BY ". $random . " LIMIT 1";
 442                 $params = array($user_id,0);
 443                 break;
 444         }
 445         $query = $this->executeQuery($sql, $params);
 446         $id = $query->fetchAll();
 447
 448         return $id;
 449     }
 450
 451     public function getPreviousArticle($id, $user_id)
 452     {
 453         $sql = "SELECT id FROM entries WHERE id = (SELECT max(id) FROM entries WHERE id < ? AND is_read=0) AND user_id=? AND is_read=0";
 454         $params = array($id, $user_id);
 455         $query = $this->executeQuery($sql, $params);
 456         $id_entry = $query->fetchAll();
 457         $id = $id_entry[0][0];
 458         return $id;
 459     }
 460
 461     public function getNextArticle($id, $user_id)
 462     {
 463         $sql = "SELECT id FROM entries WHERE id = (SELECT min(id) FROM entries WHERE id > ? AND is_read=0) AND user_id=? AND is_read=0";
 464         $params = array($id, $user_id);
 465         $query = $this->executeQuery($sql, $params);
 466         $id_entry = $query->fetchAll();
 467         $id = $id_entry[0][0];
 468         return $id;
 469     }
 470
 471
 472     public function updateContent($id, $content, $user_id)
 473     {
 474         $sql_action = 'UPDATE entries SET content = ? WHERE id=? AND user_id=?';
 475         $params_action = array($content, $id, $user_id);
 476         $query = $this->executeQuery($sql_action, $params_action);
 477         return $query;
 478     }
 479
 480     /**
 481      *
 482      * @param string $url
 483      * @param string $title
 484      * @param string $content
 485      * @param integer $user_id
 486      * @return integer $id of inserted record
 487      */
 488     public function add($url, $title, $content, $user_id, $isFavorite=0, $isRead=0)
 489     {
 490         $sql_action = 'INSERT INTO entries ( url, title, content, user_id, is_fav, is_read ) VALUES (?, ?, ?, ?, ?, ?)';
 491         $params_action = array($url, $title, $content, $user_id, $isFavorite, $isRead);
 492
 493         if ( !$this->executeQuery($sql_action, $params_action) ) {
 494           $id = null;
 495         }
 496         else {
 497           $id = intval($this->getLastId( (STORAGE == 'postgres') ? 'entries_id_seq' : '') );
 498         }
 499         return $id;
 500     }
 501
 502     public function deleteById($id, $user_id)
 503     {
 504         $sql_action     = "DELETE FROM entries WHERE id=? AND user_id=?";
 505         $params_action  = array($id, $user_id);
 506         $query          = $this->executeQuery($sql_action, $params_action);
 507         return $query;
 508     }
 509
 510     public function favoriteById($id, $user_id)
 511     {
 512         $sql_action     = "UPDATE entries SET is_fav=NOT is_fav WHERE id=? AND user_id=?";
 513         $params_action  = array($id, $user_id);
 514         $query          = $this->executeQuery($sql_action, $params_action);
 515     }
 516
 517     public function archiveById($id, $user_id)
 518     {
 519         $sql_action     = "UPDATE entries SET is_read=NOT is_read WHERE id=? AND user_id=?";
 520         $params_action  = array($id, $user_id);
 521         $query          = $this->executeQuery($sql_action, $params_action);
 522     }
 523
 524     public function archiveAll($user_id)
 525     {
 526         $sql_action     = "UPDATE entries SET is_read=? WHERE user_id=? AND is_read=?";
 527         $params_action  = array($user_id, 1, 0);
 528         $query          = $this->executeQuery($sql_action, $params_action);
 529     }
 530
 531     public function getLastId($column = '')
 532     {
 533         return $this->getHandle()->lastInsertId($column);
 534     }
 535
 536     public function search($term, $user_id, $limit = '')
 537     {
 538         $search = '%'.$term.'%';
 539         $sql_action = "SELECT * FROM entries WHERE user_id=? AND (content LIKE ? OR title LIKE ? OR url LIKE ?) "; //searches in content, title and URL
 540         $sql_action .= $this->getEntriesOrder().' ' . $limit;
 541         $params_action = array($user_id, $search, $search, $search);
 542         $query = $this->executeQuery($sql_action, $params_action);
 543         return $query->fetchAll();
 544         }
 545
 546     public function retrieveAllTags($user_id, $term = NULL)
 547     {
 548         $sql = "SELECT DISTINCT tags.*, count(entries.id) AS entriescount FROM tags
 549           LEFT JOIN tags_entries ON tags_entries.tag_id=tags.id
 550           LEFT JOIN entries ON tags_entries.entry_id=entries.id
 551           WHERE entries.user_id=?
 552             ". (($term) ? "AND lower(tags.value) LIKE ?" : '') ."
 553           GROUP BY tags.id, tags.value
 554           ORDER BY tags.value";
 555         $query = $this->executeQuery($sql, (($term)? array($user_id, strtolower('%'.$term.'%')) : array($user_id) ));
 556         $tags = $query->fetchAll();
 557
 558         return $tags;
 559     }
 560
 561     public function retrieveTag($id, $user_id)
 562     {
 563         $tag  = NULL;
 564         $sql    = "SELECT DISTINCT tags.* FROM tags
 565           LEFT JOIN tags_entries ON tags_entries.tag_id=tags.id
 566           LEFT JOIN entries ON tags_entries.entry_id=entries.id
 567           WHERE tags.id=? AND entries.user_id=?";
 568         $params = array(intval($id), $user_id);
 569         $query  = $this->executeQuery($sql, $params);
 570         $tag  = $query->fetchAll();
 571
 572         return isset($tag[0]) ? $tag[0] : NULL;
 573     }
 574
 575     public function retrieveEntriesByTag($tag_id, $user_id)
 576     {
 577         $sql =
 578             "SELECT entries.* FROM entries
 579             LEFT JOIN tags_entries ON tags_entries.entry_id=entries.id
 580             WHERE tags_entries.tag_id = ? AND entries.user_id=? ORDER by entries.id DESC";
 581         $query = $this->executeQuery($sql, array($tag_id, $user_id));
 582         $entries = $query->fetchAll();
 583
 584         return $entries;
 585     }
 586
 587     public function retrieveTagsByEntry($entry_id)
 588     {
 589         $sql =
 590             "SELECT tags.* FROM tags
 591             LEFT JOIN tags_entries ON tags_entries.tag_id=tags.id
 592             WHERE tags_entries.entry_id = ?";
 593         $query = $this->executeQuery($sql, array($entry_id));
 594         $tags = $query->fetchAll();
 595
 596         return $tags;
 597     }
 598
 599     public function removeTagForEntry($entry_id, $tag_id)
 600     {
 601         $sql_action     = "DELETE FROM tags_entries WHERE tag_id=? AND entry_id=?";
 602         $params_action  = array($tag_id, $entry_id);
 603         $query          = $this->executeQuery($sql_action, $params_action);
 604         return $query;
 605     }
 606
 607     public function cleanUnusedTag($tag_id)
 608     {
 609         $sql_action = "SELECT tags.* FROM tags JOIN tags_entries ON tags_entries.tag_id=tags.id WHERE tags.id=?";
 610         $query = $this->executeQuery($sql_action,array($tag_id));
 611         $tagstokeep = $query->fetchAll();
 612         $sql_action = "SELECT tags.* FROM tags LEFT JOIN tags_entries ON tags_entries.tag_id=tags.id WHERE tags.id=?";
 613         $query = $this->executeQuery($sql_action,array($tag_id));
 614         $alltags = $query->fetchAll();
 615
 616         foreach ($alltags as $tag) {
 617             if ($tag && !in_array($tag,$tagstokeep)) {
 618                 $sql_action = "DELETE FROM tags WHERE id=?";
 619                 $params_action = array($tag[0]);
 620                 $this->executeQuery($sql_action, $params_action);
 621                 return true;
 622             }
 623         }
 624
 625     }
 626
 627     public function retrieveTagByValue($value)
 628     {
 629         $tag  = NULL;
 630         $sql    = "SELECT * FROM tags WHERE value=?";
 631         $params = array($value);
 632         $query  = $this->executeQuery($sql, $params);
 633         $tag  = $query->fetchAll();
 634
 635         return isset($tag[0]) ? $tag[0] : null;
 636     }
 637
 638     public function createTag($value)
 639     {
 640         $sql_action = 'INSERT INTO tags ( value ) VALUES (?)';
 641         $params_action = array($value);
 642         $query = $this->executeQuery($sql_action, $params_action);
 643         return $query;
 644     }
 645
 646     public function setTagToEntry($tag_id, $entry_id)
 647     {
 648         $sql_action = 'INSERT INTO tags_entries ( tag_id, entry_id ) VALUES (?, ?)';
 649         $params_action = array($tag_id, $entry_id);
 650         $query = $this->executeQuery($sql_action, $params_action);
 651         return $query;
 652     }
 653
 654     private function getEntriesOrder()
 655     {
 656         if (isset($_SESSION['sort']) and array_key_exists($_SESSION['sort'], $this->order)) {
 657             return $this->order[$_SESSION['sort']];
 658         }
 659         else {
 660             return $this->order['default'];
 661         }
 662     }
 663 }