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         private $db = NULL;
  11
  12         public function __construct()
  13         {
  14                 if ($this->db === NULL)
  15                 {
  16                         $this->load->library('singleton_db');
  17                         $this->db = $this->singleton_db->connect();
  18                 }
  19
  20                 $this->load->helper('url');
  21         }
  22
  23         /**
  24          * Retrieves information about a set of videos which are going to be
  25          * displayed in the catalog.
  26          *
  27          * TODO: filter, limit, ordering parameters
  28          * @param               int $category_id        DB category ID
  29          * @param               int $offset
  30          * @param               int $count
  31          * @return              array   a list of videos, each one being an assoc array with:
  32          * <ul>
  33          *   <li>id, name, title, duration, thumbs_count, default_thumb, views => from DB</li>
  34          *   <li>shorted_title => ellipsized title</li>
  35          *   <li>video_url => P2P-Tube video URl</li>
  36          *   <li>TODO: user_id, user_name</li>
  37          *   <li>thumbs => thumbnail images' URLs</li>
  38          * </ul>
  39          */
  40         public function get_videos_summary($category_id, $offset, $count)
  41         {
  42                 $this->load->helper('text');
  43
  44                 $query = $this->db->query(
  45                         'SELECT id, name, title, duration, user_id, views, thumbs_count,
  46                                 default_thumb
  47                         FROM `videos`
  48                         WHERE category_id = ?
  49                         ORDER BY name
  50                         LIMIT ?, ?', // TODO summary order
  51                         array(intval($category_id), $offset, $count));
  52
  53                 if ($query->num_rows() > 0)
  54                         $videos = $query->result_array();
  55                 else
  56                         return NULL;
  57
  58                 foreach ($videos as & $video)
  59                 {
  60                         // P2P-Tube Video URL
  61                         $video['video_url'] = site_url(sprintf("watch/%d/%s",
  62                                 $video['id'], $video['name']));
  63
  64                         // Thumbnails
  65                         $video['thumbs'] = $this->get_thumbs($video['name'],
  66                                 $video['thumbs_count']);
  67
  68                         // Ellipsized title
  69                         //$video['shorted_title'] = ellipsize($video['title'], 45, 0.75);
  70                         $video['shorted_title'] = character_limiter($video['title'], 50);
  71
  72                         // TODO: user information
  73                         $video['user_name'] = 'TODO';
  74                 }
  75
  76                 return $videos;
  77         }
  78
  79         public function get_videos_count($category_id)
  80         {
  81                 $query = $this->db->query(
  82                         'SELECT COUNT(*) count
  83                         FROM `videos`
  84                         WHERE category_id = ?',
  85                         $category_id);
  86
  87                 if ($query->num_rows() > 0)
  88                         return $row = $query->row()->count;
  89
  90                 // Error
  91                 return NULL;
  92         }
  93
  94         /**
  95          * Retrieves information about a video.
  96          *
  97          * If $name does not match with the video's `name` from the DB an error is
  98          * marked in the key 'err'. If it's NULL it is ignored.
  99          *
 100          * @access              public
 101          * @param               string $id      video's `id` column from `videos` DB table
 102          * @param               string $name    video's `name` column from `videos` DB
 103          * table. NULL means there is no name provided.
 104          * @return              array   an associative list with information about a video
 105          * with the following keys:
 106          * <ul>
 107          *   <li>all columns form DB with some exceptions that are overwritten or new</li>
 108          *   <li>content is moved in assets</li>
 109          *   <li>assets => list of associative lists where each one represents a</li>
 110          * video asset having keys: "src", "res", "par" and "ext". Value of key
 111          * "src" is the video torrent formated as
 112          * {name}_{format}.{video_ext}.{default_torrent_ext}</li>
 113          *   <li>user_name => TODO: user name from `users` table</li>
 114          *   <li>category_title => a human-friendly category name</li>
 115          *   <li>tags => associative list of "tag => score"</li>
 116          *   <li>date => date and time when the video was created</li>
 117          *   <li>thumbs => thumbnail images' URLs</li>
 118          * </ul>
 119          */
 120         public function get_video($id, $name = NULL)
 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                 // Torrents
 147                 $video['url'] = array();
 148                 foreach ($video['assets'] as & $asset)
 149                 {
 150                         $def = substr($asset['res'], strpos($asset['res'], 'x') + 1) . 'p';
 151                         $asset['src'] = site_url('data/torrents/'. $video['name'] . '_'
 152                                 . $def . '.'. $asset['ext']
 153                                 . '.'. $this->config->item('default_torrent_ext'));
 154                 }
 155
 156                 // Category title
 157                 $categories = $this->config->item('categories');
 158                 $category_name = $categories[ intval($video['category_id']) ];
 159                 $video['category_title'] = $category_name ?
 160                         $this->lang->line("ui_categ_$category_name") : $category_name;
 161
 162                 // Thumbnails
 163                 $video['thumbs'] = $this->get_thumbs($video['name'], $video['thumbs_count']);
 164
 165                 // TODO: user information
 166                 $video['user_name'] = 'TODO';
 167
 168                 return $video;
 169         }
 170
 171         public function get_thumbs($name, $count)
 172         {
 173                 $thumbs = array();
 174
 175                 for ($i=0; $i < $count; $i++)
 176                         $thumbs[] = site_url(sprintf("data/thumbs/%s_t%02d.jpg", $name, $i));
 177
 178                 return $thumbs;
 179         }
 180 }
 181
 182 /* End of file videos_model.php */
 183 /* Location: ./application/models/videos_model.php */