* @author Călin-Andrei Burloiu
*/
class Videos_model extends CI_Model {
- private $db = NULL;
+ public $db = NULL;
- function __construct()
+ public function __construct()
{
if ($this->db === NULL)
{
$this->load->library('singleton_db');
$this->db = $this->singleton_db->connect();
}
+
+ $this->load->helper('url');
}
- function getVideosSummary()
+ /**
+ * Retrieves information about a set of videos which are going to be
+ * displayed in the catalog.
+ *
+ * TODO: filter, limit, ordering parameters
+ * @param int $category_id DB category ID
+ * @param int $offset
+ * @param int $count
+ * @return array a list of videos, each one being an assoc array with:
+ * <ul>
+ * <li>id, name, title, duration, thumbs_count, default_thumb, views => from DB</li>
+ * <li>shorted_title => ellipsized title</li>
+ * <li>video_url => P2P-Tube video URl</li>
+ * <li>TODO: user_id, user_name</li>
+ * <li>thumbs => thumbnail images' URLs</li>
+ * </ul>
+ */
+ public function get_videos_summary($category_id, $offset, $count)
{
- return $this->db->get('videos');
+ $this->load->helper('text');
+
+ $query = $this->db->query(
+ 'SELECT id, name, title, duration, user_id, views, thumbs_count,
+ default_thumb
+ FROM `videos`
+ WHERE category_id = ?
+ ORDER BY name
+ LIMIT ?, ?', // TODO summary order
+ array(intval($category_id), $offset, $count));
+
+ if ($query->num_rows() > 0)
+ $videos = $query->result_array();
+ else
+ return NULL;
+
+ foreach ($videos as & $video)
+ {
+ // P2P-Tube Video URL
+ $video['video_url'] = site_url(sprintf("watch/%d/%s",
+ $video['id'], $video['name']));
+
+ // Thumbnails
+ $video['thumbs'] = $this->get_thumbs($video['name'],
+ $video['thumbs_count']);
+
+ // Ellipsized title
+ //$video['shorted_title'] = ellipsize($video['title'], 45, 0.75);
+ $video['shorted_title'] = character_limiter($video['title'], 50);
+
+ // TODO: user information
+ $video['user_name'] = 'TODO';
+ }
+
+ return $videos;
+ }
+
+ public function get_videos_count($category_id)
+ {
+ $query = $this->db->query(
+ 'SELECT COUNT(*) count
+ FROM `videos`
+ WHERE category_id = ?',
+ $category_id);
+
+ if ($query->num_rows() > 0)
+ return $row = $query->row()->count;
+
+ // Error
+ return NULL;
+ }
+
+ /**
+ * Retrieves information about a video.
+ *
+ * If $name does not match with the video's `name` from the DB an error is
+ * marked in the key 'err'. If it's NULL it is ignored.
+ *
+ * @access public
+ * @param string $id video's `id` column from `videos` DB table
+ * @param string $name video's `name` column from `videos` DB
+ * table. NULL means there is no name provided.
+ * @return array an associative list with information about a video
+ * with the following keys:
+ * <ul>
+ * <li>all columns form DB with some exceptions that are overwritten or new</li>
+ * <li>content is moved in assets</li>
+ * <li>assets => list of associative lists where each one represents a</li>
+ * video asset having keys: "src", "res", "par" and "ext". Value of key
+ * "src" is the video torrent formated as
+ * {name}_{format}.{video_ext}.{default_torrent_ext}</li>
+ * <li>user_name => TODO: user name from `users` table</li>
+ * <li>category_title => a human-friendly category name</li>
+ * <li>tags => associative list of "tag => score"</li>
+ * <li>date => date and time when the video was created</li>
+ * <li>thumbs => thumbnail images' URLs</li>
+ * </ul>
+ */
+ public function get_video($id, $name = NULL)
+ {
+ $this->load->helper('video');
+
+ $query = $this->db->query('SELECT *
+ FROM `videos`
+ WHERE id = ?', $id);
+ $video = array();
+
+ if ($query->num_rows() > 0)
+ {
+ $video = $query->row_array();
+ if ($name !== NULL && $video['name'] != $name)
+ $video['err'] = 'INVALID_NAME';
+ }
+ else
+ {
+ $video['err'] = 'INVALID_ID';
+ return $video;
+ }
+
+ // Convert JSON encoded string to arrays.
+ $video['assets'] = json_decode($video['formats'], TRUE);
+ unset($video['formats']);
+ $video['tags'] = json_decode($video['tags'], TRUE);
+ asort($video['tags']);
+ $video['tags'] = array_reverse($video['tags'], TRUE);
+
+ // Sort assets by their megapixels number.
+ function access_function($a) { return $a['res']; }
+ function assets_cmp($a, $b)
+ { return megapixels_cmp($a, $b, "access_function"); }
+ usort($video['assets'], "assets_cmp");
+
+ // Torrents
+ $video['url'] = array();
+ foreach ($video['assets'] as & $asset)
+ {
+ $def = substr($asset['res'], strpos($asset['res'], 'x') + 1) . 'p';
+ $asset['src'] = site_url('data/torrents/'. $video['name'] . '_'
+ . $def . '.'. $asset['ext']
+ . '.'. $this->config->item('default_torrent_ext'));
+ }
+
+ // Category title
+ $categories = $this->config->item('categories');
+ $category_name = $categories[ intval($video['category_id']) ];
+ $video['category_title'] = $category_name ?
+ $this->lang->line("ui_categ_$category_name") : $category_name;
+
+ // Thumbnails
+ $video['thumbs'] = $this->get_thumbs($video['name'], $video['thumbs_count']);
+
+ // TODO: user information
+ $video['user_name'] = 'TODO';
+
+ return $video;
+ }
+
+ /**
+ * Increment a video parameter from DB: `views`, `likes` or `dislikes`.
+ *
+ * @param int $id DB video id
+ * @param string $param DB parameter column name.
+ * @return void
+ */
+ public function inc_video_var($id, $var)
+ {
+ // TODO error report if query returns FALSE
+ $this->db->query('UPDATE `videos` '
+ . 'SET `'. $var. '`=`'. $var. '`+1 '
+ . 'WHERE id='. $id);
}
- function getVideo($id, $name = NULL)
+ public function get_thumbs($name, $count)
{
- return $this->db->query('SELECT * from videos WHERE id = ?', $id);
+ $thumbs = array();
+
+ for ($i=0; $i < $count; $i++)
+ $thumbs[] = site_url(sprintf("data/thumbs/%s_t%02d.jpg", $name, $i));
+
+ return $thumbs;
}
}
projects / living-lab-site.git / blobdiff