X-Git-Url: http://p2p-next.cs.pub.ro/gitweb/?a=blobdiff_plain;f=application%2Fmodels%2Fvideos_model.php;h=46efd1097fe6f414c4f72193b7247e1ef0609c29;hb=3177ec9aa46ca4feeb9eda48d9b6bce66a722f42;hp=b5ae2d799ffe36d35c892cebb09c8e90b6b3fc46;hpb=0b134deb6f1108155973436e3de7296a76a2d660;p=living-lab-site.git diff --git a/application/models/videos_model.php b/application/models/videos_model.php index b5ae2d7..46efd10 100644 --- a/application/models/videos_model.php +++ b/application/models/videos_model.php @@ -7,9 +7,9 @@ * @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) { @@ -18,14 +18,362 @@ class Videos_model extends CI_Model { } } - function getVideosSummary() + /** + * Retrieves information about a set of videos which are going to be + * displayed in the catalog. + * + * @param int $category_id DB category ID + * @param int $offset + * @param int $count + * @param string $ordering control videos ording by these + * possibilities: + * + * @return array a list of videos, each one being an assoc array with: + * + */ + public function get_videos_summary($category_id, $offset, $count, $ordering = 'hottest') { - return $this->db->get('videos'); + $this->load->helper('text'); + + // Ordering + switch ($ordering) + { + case 'hottest': + $order_statement = "ORDER BY date DESC, score DESC, RAND()"; + break; + case 'newest': + $order_statement = "ORDER BY date DESC"; + break; + case 'alphabetically': + $order_statement = "ORDER BY title"; + break; + + default: + $order_statement = ""; + } + + $query = $this->db->query( + "SELECT id, name, title, duration, user_id, views, thumbs_count, + default_thumb, (views + likes - dislikes) AS score + FROM `videos` + WHERE category_id = ? + $order_statement + LIMIT ?, ?", + array(intval($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 $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 $name video's `name` column from `videos` DB + * table. NULL means there is no name provided. + * @return array an associative list with information about a video + * with the following keys: + * + */ + public function get_video($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='. $id); + } + + public function get_thumbs($name, $count) + { + $thumbs = array(); + + for ($i=0; $i < $count; $i++) + $thumbs[] = site_url(sprintf("data/thumbs/%s_t%02d.jpg", $name, $i)); + + return $thumbs; + } + + /** + * Searches videos in DB based on a search query string and returns an + * associative array of results. + * If count is zero the function only return the number of results. + * @param string $search_query + * @param int $offset + * @param int $count + * @param int $category_id if NULL, all categories are searched + * @return array an associative array with the same keys as that from + * get_videos_summary's result, but with two additional keys: + * description and date. + */ + public function search_videos($search_query, $offset = 0, $count = 0, + $category_id = NULL) + { + $search_query = trim($search_query); + $search_query = str_replace("'", " ", $search_query); + + // Search word fragments. + // sfc = search fragment condition + $sfc = "( "; + // sfr = serach fragment relevation + $sfr = "( "; + $sep = ' +-*<>()~"'; + $fragm = strtok($search_query, $sep); + while ($fragm !== FALSE) + { + $sfc .= "(title LIKE '%$fragm%' + OR description LIKE '%$fragm%' + OR tags LIKE '%$fragm%') OR "; + + // Frament relevations are half of boolean relevations such + // that they will appear at the end of the results. + $sfr .= "0.25 * (title LIKE '%$fragm%') + + 0.1 * (description LIKE '%$fragm%') + + 0.15 * (tags LIKE '%$fragm%') + "; + + $fragm = strtok($sep); + } + $sfc = substr($sfc, 0, -4) . " )"; + $sfr = substr($sfr, 0, -3) . " )"; + + if (! $this->is_advanced_search_query($search_query)) + { + $search_cond = "MATCH (title, description, tags) + AGAINST ('$search_query') OR $sfc"; + $relevance = "( MATCH (title, description, tags) + AGAINST ('$search_query') + $sfr ) AS relevance"; + } + // boolean mode + else + { + $against = "AGAINST ('$search_query' IN BOOLEAN MODE)"; + $search_cond = "( MATCH (title, description, tags) + $against) OR $sfc"; + $relevance = "( 0.5 * (MATCH(title) $against) + + 0.3 * (MATCH(tags) $against) + + 0.2 * (MATCH(description) $against) + + $sfr) AS relevance"; + } + + if ($count === 0) + { + $selected_columns = "COUNT(*) count"; + $order = ""; + $limit = ""; + } + else + { + // TODO select data, description if details are needed + $selected_columns = "id, name, title, duration, user_id, views, + thumbs_count, default_thumb, + (views + likes - dislikes) AS score, + $relevance"; + $order = "ORDER BY relevance DESC, score DESC"; + $limit = "LIMIT $offset, $count"; + } + + if ($category_id !== NULL) + $category_cond = "category_id = '$category_id' AND "; + else + $category_cond = ""; + + $str_query = "SELECT $selected_columns + FROM `videos` + WHERE $category_cond $search_cond + $order + $limit"; + //echo "

$str_query

"; + $query = $this->db->query($str_query); + + if ($query->num_rows() > 0) + { + if ($count === 0) + return $query->row()->count; + else + $videos = $query->result_array(); + } + else + return NULL; + + $this->load->helper('text'); + + foreach ($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 $videos; + } + + public function decode_search_query($search_query) + { + $search_query = urldecode($search_query); + + $search_query = str_replace('_AST_', '*', $search_query); + $search_query = str_replace('_AND_', '+', $search_query); + $search_query = str_replace('_GT_', '>', $search_query); + $search_query = str_replace('_LT_', '<', $search_query); + $search_query = str_replace('_PO_', '(', $search_query); + $search_query = str_replace('_PC_', ')', $search_query); + $search_query = str_replace('_LOW_', '~', $search_query); + $search_query = str_replace('_QUO_', '"', $search_query); + + return $search_query; } - function getVideo($id, $name = NULL) + /** + * Return TRUE if it contains any special caracter from an advanced search + * query. + * @param string $search_query + * @return boolean + */ + public function is_advanced_search_query($search_query) { - return $this->db->query('SELECT * from videos WHERE id = ?', $id); + return (preg_match('/\*|\+|\-|>|\<|\(|\)|~|"/', $search_query) == 0 + ? FALSE : TRUE); } }