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 $count
  31          * @return              array   a list of videos, each one being an assoc array with:
  32          *   * id, name, title, duration, thumbs_count, default_thumb, views => from DB
  33          *   * shorted_title => ellipsized title
  34          *   * video_url => P2P-Tube video URl
  35          *   * TODO: user_id, user_name
  36          *   * thumbs => thumbnail images' URLs
  37          */
  38         public function get_videos_summary($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 $name    video's `name` column from `videos` DB
 101          * table. NULL means there is no name provided.
 102          * @return              array   an associative list with information about a video
 103          * with the following keys:
 104          *   * all columns form DB with some exceptions that are overwritten or new
 105          *   * formats content is moved in assets
 106          *   * assets => list of associative lists where each one represents a
 107          * video asset having keys: "src", "res", "par" and "ext". Value of key
 108          * "src" is the video torrent formated as
 109          * {name}_{format}.{video_ext}.{default_torrent_ext}
 110          *   * user_name => TODO: user name from `users` table
 111          *   * category_title => a human-friendly category name
 112          *   * tags => associative list of "tag => score"
 113          *   * date => date and time when the video was created
 114          *   * thumbs => thumbnail images' URLs
 115          */
 116         public function get_video($id, $name = NULL)
 117         {
 118                 $query = $this->db->query('SELECT *
 119                                                                 FROM `videos`
 120                                                                 WHERE id = ?', $id);
 121                 $video = array();
 122
 123                 if ($query->num_rows() > 0)
 124                 {
 125                         $video = $query->row_array();
 126                         if ($name !== NULL && $video['name'] != $name)
 127                                 $video['err'] = 'INVALID_NAME';
 128                 }
 129                 else
 130                 {
 131                         $video['err'] = 'INVALID_ID';
 132                         return $video;
 133                 }
 134
 135                 // Convert JSON encoded string to arrays.
 136                 $video['assets'] = json_decode($video['formats'], TRUE);
 137                 unset($video['formats']);
 138                 $video['tags'] = json_decode($video['tags'], TRUE);
 139                 asort($video['tags']);
 140                 $video['tags'] = array_reverse($video['tags'], TRUE);
 141
 142                 // Torrents
 143                 $video['url'] = array();
 144                 foreach ($video['assets'] as & $asset)
 145                 {
 146                         $def = substr($asset['res'], strpos($asset['res'], 'x') + 1) . 'p';
 147                         $asset['src'] = site_url('data/torrents/'. $video['name'] . '_'
 148                                 . $def . '.'. $asset['ext']
 149                                 . '.'. $this->config->item('default_torrent_ext'));
 150                 }
 151
 152                 // Category title
 153                 $categories = $this->config->item('categories');
 154                 $category_name = $categories[ intval($video['category_id']) ];
 155                 $video['category_title'] = $category_name ?
 156                         $this->lang->line("ui_categ_$category_name") : $category_name;
 157
 158                 // Thumbnails
 159                 $video['thumbs'] = $this->get_thumbs($video['name'], $video['thumbs_count']);
 160
 161                 // TODO: user information
 162                 $video['user_name'] = 'TODO';
 163
 164                 return $video;
 165         }
 166
 167         public function get_thumbs($name, $count)
 168         {
 169                 $thumbs = array();
 170
 171                 for ($i=0; $i < $count; $i++)
 172                         $thumbs[] = site_url(sprintf("data/thumbs/%s_t%02d.jpg", $name, $i));
 173
 174                 return $thumbs;
 175         }
 176 }
 177
 178 /* End of file videos_model.php */
 179 /* Location: ./application/models/videos_model.php */