X-Git-Url: http://p2p-next.cs.pub.ro/gitweb/?a=blobdiff_plain;f=application%2Fmodels%2Fvideos_model.php;h=0250038b105272064cc2ecd4ae4ef2e28b0f4740;hb=355535fa933c0fc2c1d63f0d4df3b1fc6e60d05c;hp=69e7328ef694db03907f3a5585e103c42e1f5000;hpb=aaa8b077bac73addd05114fd2b2ef0829412fac7;p=living-lab-site.git diff --git a/application/models/videos_model.php b/application/models/videos_model.php index 69e7328..0250038 100644 --- a/application/models/videos_model.php +++ b/application/models/videos_model.php @@ -11,6 +11,8 @@ class Videos_model extends CI_Model { public function __construct() { + parent::__construct(); + if ($this->db === NULL) { $this->load->library('singleton_db'); @@ -19,39 +21,88 @@ class Videos_model extends CI_Model { } /** - * Retrieves information about a set of videos which are going to be - * displayed in the catalog. + * Retrieves a set of videos information which can be used for displaying + * that videos as a list with few details. * - * TODO: filter, limit, ordering parameters - * @param int $category_id DB category ID + * @param int $category_id DB category ID; pass NULL for all + * categories + * @param mixed $user an user_id (as int) or an username + * (as string); pass NULL for all users * @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, $count) + public function get_videos_summary($category_id, $user, $offset, $count, + $ordering = 'hottest') { $this->load->helper('text'); + // Ordering + switch ($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: + $order_statement = ""; + } + + // Category filtering + if ($category_id === NULL) + $cond_category = "1"; + else + { + $category_id = intval($category_id); + $cond_category = "category_id = $category_id"; + } + + // User filtering + if ($user === NULL) + $cond_user = "1"; + else + { + if (is_int($user)) + $cond_user = "v.user_id = $user"; + else if (is_string($user)) + $cond_user = "u.username = '$user'"; + } + $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)); + "SELECT v.id, name, title, duration, user_id, u.username, views, + thumbs_count, default_thumb, + (views + likes - dislikes) AS score + FROM `videos` v, `users` u + WHERE v.user_id = u.id AND $cond_category AND $cond_user + $order_statement + LIMIT $offset, $count"); if ($query->num_rows() > 0) $videos = $query->result_array(); else - return NULL; + return array(); foreach ($videos as & $video) { @@ -66,21 +117,41 @@ class Videos_model extends CI_Model { // Ellipsized title //$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) + /** + * Returns the number of videos from database from a specific category or + * user. + * NULL parameters count videos from all categories and / or all users. + * + * @param int $category_id + * @param mixed $user an user_id (as int) or an username (as string) + * @return int number of videos or NULL if an error occured + */ + public function get_videos_count($category_id = NULL, $user = NULL) { + if ($category_id === NULL) + $cond_category = "1"; + else + $cond_category = "category_id = $category_id"; + + if ($user === NULL) + $cond_user = "1"; + else + { + if (is_int($user)) + $cond_user = "v.user_id = $user"; + else if(is_string($user)) + $cond_user = "u.username = '$user'"; + } + $query = $this->db->query( - 'SELECT COUNT(*) count - FROM `videos` - WHERE category_id = ?', - $category_id); + "SELECT COUNT(*) count + FROM `videos` v, `users` u + WHERE v.user_id = u.id AND $cond_category AND $cond_user"); if ($query->num_rows() > 0) return $query->row()->count; @@ -108,7 +179,7 @@ class Videos_model extends CI_Model { * 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} - *
  • user_name => TODO: user name from `users` table
    • + *
  • username => user name from `users` table
    • *
  • category_title => a human-friendly category name
    • *
  • tags => associative list of "tag => score"
    • *
  • date => date and time when the video was created
    • @@ -119,9 +190,9 @@ class Videos_model extends CI_Model { { $this->load->helper('video'); - $query = $this->db->query('SELECT * - FROM `videos` - WHERE id = ?', $id); + $query = $this->db->query("SELECT v.*, u.username + FROM `videos` v, `users` u + WHERE v.user_id = u.id AND v.id = $id"); $video = array(); if ($query->num_rows() > 0) @@ -168,9 +239,6 @@ class Videos_model extends CI_Model { // Thumbnails $video['thumbs'] = $this->get_thumbs($video['name'], $video['thumbs_count']); - // TODO: user information - $video['user_name'] = 'TODO'; - return $video; } @@ -214,14 +282,66 @@ class Videos_model extends CI_Model { public function search_videos($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 - { - $selected_columns = "id, name, title, duration, user_id, views, thumbs_count, default_thumb, date, description"; + { + // 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"; } @@ -230,14 +350,13 @@ class Videos_model extends CI_Model { else $category_cond = ""; - $search_query = trim($search_query); - - $query = $this->db->query( - "SELECT $selected_columns + $str_query = "SELECT $selected_columns FROM `videos` - WHERE $category_cond MATCH (title, description, tags) AGAINST (?) - $limit", - array($search_query)); + WHERE $category_cond ( $search_cond ) + $order + $limit"; +// echo "

    $str_query

    "; + $query = $this->db->query($str_query); if ($query->num_rows() > 0) { @@ -271,6 +390,50 @@ class Videos_model extends CI_Model { 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 $search_query; + } + + public function encode_search_query($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); + + $search_query = urlencode($search_query); + + return $search_query; + } + + /** + * 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 (preg_match('/\*|\+|\-|>|\<|\(|\)|~|"/', $search_query) == 0 + ? FALSE : TRUE); + } } /* End of file videos_model.php */