4 * Class Videos_model models videos information from the DB
7 * @author Călin-Andrei Burloiu
9 class Videos_model extends CI_Model {
12 public function __construct()
14 parent::__construct();
16 if ($this->db === NULL)
18 $this->load->library('singleton_db');
19 $this->db = $this->singleton_db->connect();
24 * Retrieves a set of videos information which can be used for displaying
25 * that videos as a list with few details.
27 * @param int $category_id DB category ID; pass NULL for all
29 * @param mixed $user an user_id (as int) or an username
30 * (as string); pass NULL for all users
33 * @param string $ordering control videos ording by these
36 * <li><strong>'hottest':</strong> newest most appreciated first. An
37 * appreciated video is one which has a bigger
38 * score = views + likes - dislikes.</li>
39 * <li><strong>'newest':</strong> newest first.</li>
40 * <li><strong>'alphabetically':</strong> sort alphabetically.</li>
42 * @return array a list of videos, each one being an assoc array with:
44 * <li>id, name, title, duration, thumbs_count, default_thumb, views => from DB</li>
45 * <li>shorted_title => ellipsized title</li>
46 * <li>video_url => P2P-Tube video URl</li>
47 * <li>user_id, user_name</li>
48 * <li>thumbs => thumbnail images' URLs</li>
51 public function get_videos_summary($category_id, $user, $offset, $count,
52 $ordering = 'hottest')
54 $this->load->helper('text');
60 $order_statement = "ORDER BY date DESC, score DESC, RAND()";
63 $order_statement = "ORDER BY date DESC";
65 case 'alphabetically':
66 $order_statement = "ORDER BY title";
70 $order_statement = "";
74 if ($category_id === NULL)
78 $category_id = intval($category_id);
79 $cond_category = "category_id = $category_id";
88 $cond_user = "v.user_id = $user";
89 else if (is_string($user))
90 $cond_user = "u.username = '$user'";
93 $query = $this->db->query(
94 "SELECT v.id, name, title, duration, user_id, u.username, views,
95 thumbs_count, default_thumb,
96 (views + likes - dislikes) AS score
97 FROM `videos` v, `users` u
98 WHERE v.user_id = u.id AND $cond_category AND $cond_user
100 LIMIT $offset, $count");
102 if ($query->num_rows() > 0)
103 $videos = $query->result_array();
107 foreach ($videos as & $video)
109 // P2P-Tube Video URL
110 $video['video_url'] = site_url(sprintf("watch/%d/%s",
111 $video['id'], $video['name']));
114 $video['thumbs'] = $this->get_thumbs($video['name'],
115 $video['thumbs_count']);
118 //$video['shorted_title'] = ellipsize($video['title'], 45, 0.75);
119 $video['shorted_title'] = character_limiter($video['title'], 50);
126 * Returns the number of videos from database from a specific category or
128 * NULL parameters count videos from all categories and / or all users.
130 * @param int $category_id
131 * @param mixed $user an user_id (as int) or an username (as string)
132 * @return int number of videos or FALSE if an error occured
134 public function get_videos_count($category_id = NULL, $user = NULL)
136 if ($category_id === NULL)
137 $cond_category = "1";
139 $cond_category = "category_id = $category_id";
146 $cond_user = "v.user_id = $user";
147 else if(is_string($user))
148 $cond_user = "u.username = '$user'";
151 $query = $this->db->query(
152 "SELECT COUNT(*) count
153 FROM `videos` v, `users` u
154 WHERE v.user_id = u.id AND $cond_category AND $cond_user");
156 if ($query->num_rows() > 0)
157 return $query->row()->count;
164 * Retrieves information about a video.
166 * If $name does not match with the video's `name` from the DB an error is
167 * marked in the key 'err'. If it's NULL it is ignored.
170 * @param string $id video's `id` column from `videos` DB table
171 * @param string $name video's `name` column from `videos` DB
172 * table. NULL means there is no name provided.
173 * @return array an associative list with information about a video
174 * with the following keys:
176 * <li>all columns form DB with some exceptions that are overwritten or new</li>
177 * <li>content is moved in assets</li>
178 * <li>assets => list of associative lists where each one represents a</li>
179 * video asset having keys: "src", "res", "par" and "ext". Value of key
180 * "src" is the video torrent formated as
181 * {name}_{format}.{video_ext}.{default_torrent_ext}</li>
182 * <li>username => user name from `users` table</li>
183 * <li>category_title => a human-friendly category name</li>
184 * <li>tags => associative list of "tag => score"</li>
185 * <li>date => date and time when the video was created</li>
186 * <li>thumbs => thumbnail images' URLs</li>
189 public function get_video($id, $name = NULL)
191 $this->load->helper('video');
192 $this->load->helper('text');
194 $query = $this->db->query("SELECT v.*, u.username
195 FROM `videos` v, `users` u
196 WHERE v.user_id = u.id AND v.id = $id");
199 if ($query->num_rows() > 0)
201 $video = $query->row_array();
202 if ($name !== NULL && $video['name'] != $name)
203 $video['err'] = 'INVALID_NAME';
207 $video['err'] = 'INVALID_ID';
211 // Convert JSON encoded string to arrays.
212 $video['assets'] = json_decode($video['formats'], TRUE);
213 unset($video['formats']);
214 $video['tags'] = json_decode($video['tags'], TRUE);
215 asort($video['tags']);
216 $video['tags'] = array_reverse($video['tags'], TRUE);
218 // Sort assets by their megapixels number.
219 function access_function($a) { return $a['res']; }
220 function assets_cmp($a, $b)
221 { return megapixels_cmp($a, $b, "access_function"); }
222 usort($video['assets'], "assets_cmp");
225 $video['url'] = array();
226 foreach ($video['assets'] as & $asset)
228 $def = substr($asset['res'], strpos($asset['res'], 'x') + 1) . 'p';
229 $asset['def'] = $def;
230 $asset['src'] = site_url('data/torrents/'. $video['name'] . '_'
231 . $def . '.'. $asset['ext']
232 . '.'. $this->config->item('default_torrent_ext'));
236 $categories = $this->config->item('categories');
237 $category_name = $categories[ intval($video['category_id']) ];
238 $video['category_title'] = $category_name ?
239 $this->lang->line("ui_categ_$category_name") : $category_name;
242 $video['thumbs'] = $this->get_thumbs($video['name'], $video['thumbs_count']);
244 // Shorted description
245 $video['shorted_description'] = character_limiter(
246 $video['description'], 128);
252 * Retrieves comments for a video.
254 * @param int $video_id
257 * @param string $ordering control comments ording by these possibilities:
259 * <li><strong>'hottest':</strong> newest most appreciated first. An
260 * appreciated comment is one which has a bigger
261 * score = likes - dislikes.</li>
262 * <li><strong>'newest':</strong> newest first.</li>
264 * @return array an array with comments
266 public function get_video_comments($video_id, $offset, $count,
267 $ordering = 'newest')
269 $this->load->helper('date');
276 $order_statement = "ORDER BY time DESC";
279 $order_statement = "ORDER BY score DESC, time DESC";
280 $cond_hottest = "AND c.likes + c.dislikes > 0";
284 $order_statement = "";
287 $query = $this->db->query(
288 "SELECT c.*, u.username, u.time_zone, (c.likes + c.dislikes) AS score
289 FROM `videos_comments` c, `users` u
290 WHERE c.user_id = u.id AND video_id = $video_id $cond_hottest
292 LIMIT $offset, $count");
294 if ($query->num_rows() == 0)
297 $comments = $query->result_array();
299 foreach ($comments as & $comment)
301 $comment['local_time'] = human_gmt_to_human_local($comment['time'],
302 $comment['time_zone']);
308 public function get_video_comments_count($video_id)
310 $query = $this->db->query(
311 "SELECT COUNT(*) count
312 FROM `videos_comments`
313 WHERE video_id = $video_id");
315 if ($query->num_rows() == 0)
318 return $query->row()->count;
322 * Insert in DB a comment for a video.
324 * @param int $video_id
325 * @param int $user_id
326 * @param string $content
328 public function comment_video($video_id, $user_id, $content)
331 $content = substr($content, 0, 512);
332 $content = htmlspecialchars($content);
333 $content = nl2br($content);
335 return $query = $this->db->query(
336 "INSERT INTO `videos_comments` (video_id, user_id, content, time)
337 VALUES ($video_id, $user_id, '$content', UTC_TIMESTAMP())");
341 * Increments views count for a video.
343 * @param int $id DB video id
346 public function inc_views($id)
348 return $this->db->query('UPDATE `videos` '
349 . 'SET `views`=`views`+1 '
353 public function vote($video_id, $user_id, $like = TRUE)
366 $query = $this->db->query("SELECT * FROM `users_actions`
367 WHERE user_id = $user_id
368 AND target_id = $video_id
369 AND target_type = 'video'
370 AND action = '$action'
371 AND date = CURDATE()");
372 // User already voted today
373 if ($query->num_rows() > 0)
376 $this->db->query("UPDATE `videos`
378 WHERE id = $video_id");
380 // Mark this action so that the user cannot repeat it today.
381 $this->db->query("INSERT INTO `users_actions`
382 (user_id, action, target_type, target_id, date)
383 VALUES ( $user_id, '$action', 'video', $video_id, CURDATE() )");
385 $query = $this->db->query("SELECT $col FROM `videos`
386 WHERE id = $video_id");
388 if ($query->num_rows() === 1)
390 $row = $query->row_array();
398 public function vote_comment($comment_id, $user_id, $like = TRUE)
411 $query = $this->db->query("SELECT * FROM `users_actions`
412 WHERE user_id = $user_id
413 AND target_id = $comment_id
414 AND target_type = 'vcomment'
415 AND action = '$action'
416 AND date = CURDATE()");
417 // User already voted today
418 if ($query->num_rows() > 0)
421 $this->db->query("UPDATE `videos_comments`
423 WHERE id = $comment_id");
425 // Mark this action so that the user cannot repeat it today.
426 $this->db->query("INSERT INTO `users_actions`
427 (user_id, action, target_type, target_id, date)
428 VALUES ( $user_id, '$action', 'vcomment', $comment_id, CURDATE() )");
430 $query = $this->db->query("SELECT $col FROM `videos_comments`
431 WHERE id = $comment_id");
433 if ($query->num_rows() === 1)
435 $row = $query->row_array();
443 public function get_thumbs($name, $count)
447 for ($i=0; $i < $count; $i++)
448 $thumbs[] = site_url(sprintf("data/thumbs/%s_t%02d.jpg", $name, $i));
454 * Searches videos in DB based on a search query string and returns an
455 * associative array of results.
456 * If count is zero the function only return the number of results.
457 * @param string $search_query
460 * @param int $category_id if NULL, all categories are searched
461 * @return array an associative array with the same keys as that from
462 * get_videos_summary's result, but with two additional keys:
463 * description and date.
465 public function search_videos($search_query, $offset = 0, $count = 0,
468 $search_query = trim($search_query);
469 $search_query = str_replace("'", " ", $search_query);
471 // Search word fragments.
472 // sfc = search fragment condition
474 // sfr = serach fragment relevation
477 $fragm = strtok($search_query, $sep);
478 while ($fragm !== FALSE)
480 $sfc .= "(title LIKE '%$fragm%'
481 OR description LIKE '%$fragm%'
482 OR tags LIKE '%$fragm%') OR ";
484 // Frament relevations are half of boolean relevations such
485 // that they will appear at the end of the results.
486 $sfr .= "0.25 * (title LIKE '%$fragm%')
487 + 0.1 * (description LIKE '%$fragm%')
488 + 0.15 * (tags LIKE '%$fragm%') + ";
490 $fragm = strtok($sep);
492 $sfc = substr($sfc, 0, -4) . " )";
493 $sfr = substr($sfr, 0, -3) . " )";
495 if (! $this->is_advanced_search_query($search_query))
497 $search_cond = "MATCH (title, description, tags)
498 AGAINST ('$search_query') OR $sfc";
499 $relevance = "( MATCH (title, description, tags)
500 AGAINST ('$search_query') + $sfr ) AS relevance";
505 $against = "AGAINST ('$search_query' IN BOOLEAN MODE)";
506 $search_cond = "( MATCH (title, description, tags)
508 $relevance = "( 0.5 * (MATCH(title) $against)
509 + 0.3 * (MATCH(tags) $against)
510 + 0.2 * (MATCH(description) $against)
511 + $sfr) AS relevance";
516 $selected_columns = "COUNT(*) count";
522 // TODO select data, description if details are needed
523 $selected_columns = "v.id, name, title, duration, user_id, views,
524 thumbs_count, default_thumb, u.username,
525 (views + likes - dislikes) AS score,
527 $order = "ORDER BY relevance DESC, score DESC";
528 $limit = "LIMIT $offset, $count";
531 if ($category_id !== NULL)
532 $category_cond = "category_id = '$category_id' AND ";
536 $str_query = "SELECT $selected_columns
537 FROM `videos` v, `users` u
538 WHERE v.user_id = u.id AND $category_cond ( $search_cond )
541 // echo "<p>$str_query</p>";
542 $query = $this->db->query($str_query);
544 if ($query->num_rows() > 0)
547 return $query->row()->count;
549 $videos = $query->result_array();
554 $this->load->helper('text');
556 foreach ($videos as & $video)
558 // P2P-Tube Video URL
559 $video['video_url'] = site_url(sprintf("watch/%d/%s",
560 $video['id'], $video['name']));
563 $video['thumbs'] = $this->get_thumbs($video['name'],
564 $video['thumbs_count']);
567 //$video['shorted_title'] = ellipsize($video['title'], 45, 0.75);
568 $video['shorted_title'] = character_limiter($video['title'], 50);
570 // TODO: user information
571 $video['user_name'] = 'TODO';
577 public function decode_search_query($search_query)
579 $search_query = urldecode($search_query);
581 $search_query = str_replace('_AST_', '*', $search_query);
582 $search_query = str_replace('_AND_', '+', $search_query);
583 $search_query = str_replace('_GT_', '>', $search_query);
584 $search_query = str_replace('_LT_', '<', $search_query);
585 $search_query = str_replace('_PO_', '(', $search_query);
586 $search_query = str_replace('_PC_', ')', $search_query);
587 $search_query = str_replace('_LOW_', '~', $search_query);
588 $search_query = str_replace('_QUO_', '"', $search_query);
590 return $search_query;
593 public function encode_search_query($search_query)
595 $search_query = str_replace('*', '_AST_', $search_query);
596 $search_query = str_replace('+', '_AND_', $search_query);
597 $search_query = str_replace('>', '_GT_', $search_query);
598 $search_query = str_replace('<', '_LT_', $search_query);
599 $search_query = str_replace('(', '_PO_', $search_query);
600 $search_query = str_replace(')', '_PC_', $search_query);
601 $search_query = str_replace('~', '_LOW_', $search_query);
602 $search_query = str_replace('"', '_QUO_', $search_query);
604 $search_query = urlencode($search_query);
606 return $search_query;
610 * Return TRUE if it contains any special caracter from an advanced search
612 * @param string $search_query
615 public function is_advanced_search_query($search_query)
617 return (preg_match('/\*|\+|\-|>|\<|\(|\)|~|"/', $search_query) == 0
622 /* End of file videos_model.php */
623 /* Location: ./application/models/videos_model.php */