application/models/videos_model.php

   1 <?php
   2
   3 /**
   4  * Class Videos_model models videos information from the DB
   5  *
   6  * @category    Model
   7  * @author              Călin-Andrei Burloiu
   8  */
   9 class Videos_model extends CI_Model {
  10         public $db = NULL;
  11
  12         public function __construct()
  13         {
  14                 if ($this->db === NULL)
  15                 {
  16                         $this->load->library('singleton_db');
  17                         $this->db = $this->singleton_db->connect();
  18                 }
  19         }
  20
  21         /**
  22          * Retrieves information about a set of videos which are going to be
  23          * displayed in the catalog.
  24          *
  25          * TODO: filter, limit, ordering parameters
  26          * @param               int $category_id        DB category ID
  27          * @param               int $offset
  28          * @param               int $count
  29          * @return              array   a list of videos, each one being an assoc array with:
  30          * <ul>
  31          *   <li>id, name, title, duration, thumbs_count, default_thumb, views => from DB</li>
  32          *   <li>shorted_title => ellipsized title</li>
  33          *   <li>video_url => P2P-Tube video URl</li>
  34          *   <li>TODO: user_id, user_name</li>
  35          *   <li>thumbs => thumbnail images' URLs</li>
  36          * </ul>
  37          */
  38         public function get_videos_summary($category_id, $offset, $count)
  39         {
  40                 $this->load->helper('text');
  41
  42                 $query = $this->db->query(
  43                         'SELECT id, name, title, duration, user_id, views, thumbs_count,
  44                                 default_thumb
  45                         FROM `videos`
  46                         WHERE category_id = ?
  47                         ORDER BY name
  48                         LIMIT ?, ?', // TODO summary order
  49                         array(intval($category_id), $offset, $count));
  50
  51                 if ($query->num_rows() > 0)
  52                         $videos = $query->result_array();
  53                 else
  54                         return NULL;
  55
  56                 foreach ($videos as & $video)
  57                 {
  58                         // P2P-Tube Video URL
  59                         $video['video_url'] = site_url(sprintf("watch/%d/%s",
  60                                 $video['id'], $video['name']));
  61
  62                         // Thumbnails
  63                         $video['thumbs'] = $this->get_thumbs($video['name'],
  64                                 $video['thumbs_count']);
  65
  66                         // Ellipsized title
  67                         //$video['shorted_title'] = ellipsize($video['title'], 45, 0.75);
  68                         $video['shorted_title'] = character_limiter($video['title'], 50);
  69
  70                         // TODO: user information
  71                         $video['user_name'] = 'TODO';
  72                 }
  73
  74                 return $videos;
  75         }
  76
  77         public function get_videos_count($category_id)
  78         {
  79                 $query = $this->db->query(
  80                         'SELECT COUNT(*) count
  81                         FROM `videos`
  82                         WHERE category_id = ?',
  83                         $category_id);
  84
  85                 if ($query->num_rows() > 0)
  86                         return $row = $query->row()->count;
  87
  88                 // Error
  89                 return NULL;
  90         }
  91
  92         /**
  93          * Retrieves information about a video.
  94          *
  95          * If $name does not match with the video's `name` from the DB an error is
  96          * marked in the key 'err'. If it's NULL it is ignored.
  97          *
  98          * @access              public
  99          * @param               string $id      video's `id` column from `videos` DB table
 100          * @param               string $name    video's `name` column from `videos` DB
 101          * table. NULL means there is no name provided.
 102          * @return              array   an associative list with information about a video
 103          * with the following keys:
 104          * <ul>
 105          *   <li>all columns form DB with some exceptions that are overwritten or new</li>
 106          *   <li>content is moved in assets</li>
 107          *   <li>assets => list of associative lists where each one represents a</li>
 108          * video asset having keys: "src", "res", "par" and "ext". Value of key
 109          * "src" is the video torrent formated as
 110          * {name}_{format}.{video_ext}.{default_torrent_ext}</li>
 111          *   <li>user_name => TODO: user name from `users` table</li>
 112          *   <li>category_title => a human-friendly category name</li>
 113          *   <li>tags => associative list of "tag => score"</li>
 114          *   <li>date => date and time when the video was created</li>
 115          *   <li>thumbs => thumbnail images' URLs</li>
 116          * </ul>
 117          */
 118         public function get_video($id, $name = NULL)
 119         {
 120                 $this->load->helper('video');
 121
 122                 $query = $this->db->query('SELECT *
 123                                                                 FROM `videos`
 124                                                                 WHERE id = ?', $id);
 125                 $video = array();
 126
 127                 if ($query->num_rows() > 0)
 128                 {
 129                         $video = $query->row_array();
 130                         if ($name !== NULL && $video['name'] != $name)
 131                                 $video['err'] = 'INVALID_NAME';
 132                 }
 133                 else
 134                 {
 135                         $video['err'] = 'INVALID_ID';
 136                         return $video;
 137                 }
 138
 139                 // Convert JSON encoded string to arrays.
 140                 $video['assets'] = json_decode($video['formats'], TRUE);
 141                 unset($video['formats']);
 142                 $video['tags'] = json_decode($video['tags'], TRUE);
 143                 asort($video['tags']);
 144                 $video['tags'] = array_reverse($video['tags'], TRUE);
 145
 146                 // Sort assets by their megapixels number.
 147                 function access_function($a) { return $a['res']; }
 148                 function assets_cmp($a, $b)
 149                         { return megapixels_cmp($a, $b, "access_function"); }
 150                 usort($video['assets'], "assets_cmp");
 151
 152                 // Torrents
 153                 $video['url'] = array();
 154                 foreach ($video['assets'] as & $asset)
 155                 {
 156                         $def = substr($asset['res'], strpos($asset['res'], 'x') + 1) . 'p';
 157                         $asset['src'] = site_url('data/torrents/'. $video['name'] . '_'
 158                                 . $def . '.'. $asset['ext']
 159                                 . '.'. $this->config->item('default_torrent_ext'));
 160                 }
 161
 162                 // Category title
 163                 $categories = $this->config->item('categories');
 164                 $category_name = $categories[ intval($video['category_id']) ];
 165                 $video['category_title'] = $category_name ?
 166                         $this->lang->line("ui_categ_$category_name") : $category_name;
 167
 168                 // Thumbnails
 169                 $video['thumbs'] = $this->get_thumbs($video['name'], $video['thumbs_count']);
 170
 171                 // TODO: user information
 172                 $video['user_name'] = 'TODO';
 173
 174                 return $video;
 175         }
 176
 177         /**
 178          * Increment a video parameter from DB: `views`, `likes` or `dislikes`.
 179          *
 180          * @param int $id       DB video id
 181          * @param string $param DB parameter column name.
 182          * @return void
 183          */
 184         public function inc_video_var($id, $var)
 185         {
 186                 // TODO error report if query returns FALSE
 187                 $this->db->query('UPDATE `videos` '
 188                                                 . 'SET `'. $var. '`=`'. $var. '`+1 '
 189                                                 . 'WHERE id='. $id);
 190         }
 191
 192         public function get_thumbs($name, $count)
 193         {
 194                 $thumbs = array();
 195
 196                 for ($i=0; $i < $count; $i++)
 197                         $thumbs[] = site_url(sprintf("data/thumbs/%s_t%02d.jpg", $name, $i));
 198
 199                 return $thumbs;
 200         }
 201
 202         public function search_videos($str_search)
 203         {
 204                 // TODO offset, count for search
 205                 $offset = 0;
 206                 $count = 100;
 207
 208                 $str_search = trim($str_search);
 209
 210                 $query = $this->db->query(
 211                         "SELECT id, name, title, duration, user_id, views, thumbs_count,
 212                                 default_thumb
 213                         FROM `videos`
 214                         WHERE MATCH (title, description, tags) AGAINST (?)
 215                         ORDER BY name
 216                         LIMIT ?, ?",
 217                         array($str_search, $offset, $count));
 218
 219                 if ($query->num_rows() > 0)
 220                         $videos = $query->result_array();
 221                 else
 222                         return NULL;
 223
 224                 $this->load->helper('text');
 225
 226                 foreach ($videos as & $video)
 227                 {
 228                         // P2P-Tube Video URL
 229                         $video['video_url'] = site_url(sprintf("watch/%d/%s",
 230                                 $video['id'], $video['name']));
 231
 232                         // Thumbnails
 233                         $video['thumbs'] = $this->get_thumbs($video['name'],
 234                                 $video['thumbs_count']);
 235
 236                         // Ellipsized title
 237                         //$video['shorted_title'] = ellipsize($video['title'], 45, 0.75);
 238                         $video['shorted_title'] = character_limiter($video['title'], 50);
 239
 240                         // TODO: user information
 241                         $video['user_name'] = 'TODO';
 242                 }
 243
 244                 return $videos;
 245         }
 246 }
 247
 248 /* End of file videos_model.php */
 249 /* Location: ./application/models/videos_model.php */