db === NULL)
{
$this->load->library('singleton_db');
$this->db = $this->singleton_db->connect();
}
}
/**
* 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 $ordering control videos ording by these
* possibilities:
*
* - 'hottest': newest most appreciated first. An
* appreciated video is one which has a bigger
* score = views + likes - dislikes.
* - 'newest': newest first.
* - 'alphabetically': sort alphabetically.
*
* @return array a list of videos, each one being an assoc array with:
*
* - id, name, title, duration, thumbs_count, default_thumb, views => from DB
* - shorted_title => ellipsized title
* - video_url => P2P-Tube video URl
* - TODO: user_id, user_name
* - thumbs => thumbnail images' URLs
*
*/
public function get_videos_summary($category_id, $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 = "";
}
$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 $name video's `name` column from `videos` DB
* table. NULL means there is no name provided.
* @return array an associative list with information about a video
* with the following keys:
*
* - all columns form DB with some exceptions that are overwritten or new
* - content is moved in assets
* - assets => list of associative lists where each one represents a
* video asset having keys: "src", "res", "par" and "ext". Value of key
* "src" is the video torrent formated as
* {name}_{format}.{video_ext}.{default_torrent_ext}
* - user_name => TODO: user name from `users` table
* - category_title => a human-friendly category name
* - tags => associative list of "tag => score"
* - date => date and time when the video was created
* - thumbs => thumbnail images' URLs
*
*/
public function get_video($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)
{
if (! $this->is_advanced_search_query($search_query)) // if natural language mode
{
$search_cond = "MATCH (title, description, tags)
AGAINST ('$search_query')";
$relevance = "$search_cond AS relevance";
} // if boolean mode
else
{
$against = "AGAINST ('$search_query' IN BOOLEAN MODE)";
$search_cond = "MATCH (title, description, tags)
$against";
$relevance = "( (0.5 * (MATCH(title) $against))
+ (0.3 * (MATCH(tags) $against))
+ (0.2 * (MATCH(description) $against)) ) AS relevance";
}
if ($count === 0)
{
$selected_columns = "COUNT(*) count";
$order = "";
$limit = "";
}
else
{
$selected_columns = "id, name, title, duration, user_id, views,
thumbs_count, default_thumb, date, description,
(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 = "";
$search_query = trim($search_query);
$str_query = "SELECT $selected_columns
FROM `videos`
WHERE $category_cond $search_cond
$order
$limit";
$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;
}
/**
* 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 */
/* Location: ./application/models/videos_model.php */