X-Git-Url: http://p2p-next.cs.pub.ro/gitweb/?a=blobdiff_plain;f=application%2Fmodels%2Fvideos_model.php;h=711b967a0930f36f0a01b4c9d00a0a28891d7bd1;hb=a4de6b263b2faef2a215da76c93b756299201544;hp=c887b70c84eb1f8084322a6992c46bd6ce5c9643;hpb=17f4b407bb41c5b15f5089d83712a6b5dfaed00b;p=living-lab-site.git diff --git a/application/models/videos_model.php b/application/models/videos_model.php index c887b70..711b967 100644 --- a/application/models/videos_model.php +++ b/application/models/videos_model.php @@ -11,49 +11,98 @@ class Videos_model extends CI_Model { public function __construct() { + parent::__construct(); + if ($this->db === NULL) { $this->load->library('singleton_db'); $this->db = $this->singleton_db->connect(); } - - $this->load->helper('url'); } /** - * 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 & $video) { @@ -68,27 +117,47 @@ class Videos_model extends CI_Model { // Ellipsized title //$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 $user an user_id (as int) or an username (as string) + * @return int number of videos or FALSE if an error occured + */ + public function get_videos_count($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 $row = $query->row()->count; + return $query->row()->count; // Error - return NULL; + return FALSE; } /** @@ -110,7 +179,7 @@ class Videos_model extends CI_Model { * video asset having keys: "src", "res", "par" and "ext". Value of key * "src" is the video torrent formated as * {name}_{format}.{video_ext}.{default_torrent_ext} - *
  • user_name => TODO: user name from `users` table
    • + *
  • username => user name from `users` table
    • *
  • category_title => a human-friendly category name
    • *
  • tags => associative list of "tag => score"
    • *
  • date => date and time when the video was created
    • @@ -120,10 +189,11 @@ class Videos_model extends CI_Model { public function get_video($id, $name = NULL) { $this->load->helper('video'); + $this->load->helper('text'); - $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) @@ -156,6 +226,7 @@ class Videos_model extends CI_Model { foreach ($video['assets'] as & $asset) { $def = substr($asset['res'], strpos($asset['res'], 'x') + 1) . 'p'; + $asset['def'] = $def; $asset['src'] = site_url('data/torrents/'. $video['name'] . '_' . $def . '.'. $asset['ext'] . '.'. $this->config->item('default_torrent_ext')); @@ -170,27 +241,205 @@ class Videos_model extends CI_Model { // Thumbnails $video['thumbs'] = $this->get_thumbs($video['name'], $video['thumbs_count']); - // TODO: user information - $video['user_name'] = 'TODO'; + // Shorted description + $video['shorted_description'] = character_limiter( + $video['description'], 128); return $video; } /** - * Increment a video parameter from DB: `views`, `likes` or `dislikes`. + * Retrieves comments for a video. + * + * @param int $video_id + * @param int $offset + * @param int $count + * @param string $ordering control comments ording by these possibilities: + * + * @return array an array with comments + */ + public function get_video_comments($video_id, $offset, $count, + $ordering = 'newest') + { + $this->load->helper('date'); + $cond_hottest = ''; + + // Ordering + switch ($ordering) + { + case 'newest': + $order_statement = "ORDER BY time DESC"; + break; + case 'hottest': + $order_statement = "ORDER BY score DESC, time DESC"; + $cond_hottest = "AND c.likes + c.dislikes > 0"; + break; + + default: + $order_statement = ""; + } + + $query = $this->db->query( + "SELECT c.*, u.username, u.time_zone, (c.likes + c.dislikes) AS score + FROM `videos_comments` c, `users` u + WHERE c.user_id = u.id AND video_id = $video_id $cond_hottest + $order_statement + LIMIT $offset, $count"); + + if ($query->num_rows() == 0) + return array(); + + $comments = $query->result_array(); + + foreach ($comments as & $comment) + { + $comment['local_time'] = human_gmt_to_human_local($comment['time'], + $comment['time_zone']); + } + + return $comments; + } + + public function get_video_comments_count($video_id) + { + $query = $this->db->query( + "SELECT COUNT(*) count + FROM `videos_comments` + WHERE video_id = $video_id"); + + if ($query->num_rows() == 0) + return FALSE; + + return $query->row()->count; + } + + /** + * Insert in DB a comment for a video. + * + * @param int $video_id + * @param int $user_id + * @param string $content + */ + public function comment_video($video_id, $user_id, $content) + { + // Prepping content. + $content = substr($content, 0, 512); + $content = htmlspecialchars($content); + $content = nl2br($content); + + return $query = $this->db->query( + "INSERT INTO `videos_comments` (video_id, user_id, content, time) + VALUES ($video_id, $user_id, '$content', UTC_TIMESTAMP())"); + } + + /** + * Increments views count for a video. * * @param int $id DB video id - * @param string $param DB parameter column name. * @return void */ - public function inc_video_var($id, $var) + public function inc_views($id) { - // TODO error report if query returns FALSE - $this->db->query('UPDATE `videos` ' - . 'SET `'. $var. '`=`'. $var. '`+1 ' + return $this->db->query('UPDATE `videos` ' + . 'SET `views`=`views`+1 ' . 'WHERE id='. $id); } + public function vote($video_id, $user_id, $like = TRUE) + { + if ($like) + { + $col = 'likes'; + $action = 'like'; + } + else + { + $col = 'dislikes'; + $action = 'dislike'; + } + + $query = $this->db->query("SELECT * FROM `users_actions` + WHERE user_id = $user_id + AND target_id = $video_id + AND target_type = 'video' + AND action = '$action' + AND date = CURDATE()"); + // User already voted today + if ($query->num_rows() > 0) + return -1; + + $this->db->query("UPDATE `videos` + SET $col = $col + 1 + WHERE id = $video_id"); + + // Mark this action so that the user cannot repeat it today. + $this->db->query("INSERT INTO `users_actions` + (user_id, action, target_type, target_id, date) + VALUES ( $user_id, '$action', 'video', $video_id, CURDATE() )"); + + $query = $this->db->query("SELECT $col FROM `videos` + WHERE id = $video_id"); + + if ($query->num_rows() === 1) + { + $row = $query->row_array(); + return $row[ $col ]; + } + + // Error + return FALSE; + } + + public function vote_comment($comment_id, $user_id, $like = TRUE) + { + if ($like) + { + $col = 'likes'; + $action = 'like'; + } + else + { + $col = 'dislikes'; + $action = 'dislike'; + } + + $query = $this->db->query("SELECT * FROM `users_actions` + WHERE user_id = $user_id + AND target_id = $comment_id + AND target_type = 'vcomment' + AND action = '$action' + AND date = CURDATE()"); + // User already voted today + if ($query->num_rows() > 0) + return -1; + + $this->db->query("UPDATE `videos_comments` + SET $col = $col + 1 + WHERE id = $comment_id"); + + // Mark this action so that the user cannot repeat it today. + $this->db->query("INSERT INTO `users_actions` + (user_id, action, target_type, target_id, date) + VALUES ( $user_id, '$action', 'vcomment', $comment_id, CURDATE() )"); + + $query = $this->db->query("SELECT $col FROM `videos_comments` + WHERE id = $comment_id"); + + if ($query->num_rows() === 1) + { + $row = $query->row_array(); + return $row[ $col ]; + } + + // Error + return FALSE; + } + public function get_thumbs($name, $count) { $thumbs = array(); @@ -201,30 +450,109 @@ class Videos_model extends CI_Model { return $thumbs; } - public function search_videos($str_search) + /** + * 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) { - // TODO offset, count for search - $offset = 0; - $count = 100; - - $str_search = trim($str_search); - - $this->load->helper('text'); + $search_query = trim($search_query); + $search_query = str_replace("'", " ", $search_query); - $query = $this->db->query( - "SELECT id, name, title, duration, user_id, views, thumbs_count, - default_thumb - FROM `videos` - WHERE title LIKE '%". $str_search . "%' - ORDER BY name - LIMIT ?, ?", // TODO summary order - array($offset, $count)); + // 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 = "v.id, name, title, duration, user_id, views, + thumbs_count, default_thumb, u.username, + (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` v, `users` u + WHERE v.user_id = u.id AND $category_cond ( $search_cond ) + $order + $limit"; +// echo "

    $str_query

    "; + $query = $this->db->query($str_query); if ($query->num_rows() > 0) - $videos = $query->result_array(); + { + if ($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 @@ -245,6 +573,50 @@ 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 */