db === NULL)
{
$this->load->library('singleton_db');
$this->db = $this->singleton_db->connect();
}
}
/**
* Retrieves a set of videos information which can be used for displaying
* that videos as a list with few details.
*
* @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 $ordering control videos ording by these
* possibilities:
*
* - 'hottest': newest most appreciated first. An
* appreciated video is one which has a bigger
* score = views + likes - dislikes.
* - 'newest': newest first.
* - 'alphabetically': sort alphabetically.
*
* @return array a list of videos, each one being an assoc array with:
*
* - id, name, title, duration, thumbs_count, default_thumb, views => from DB
* - shorted_title => ellipsized title
* - video_url => P2P-Tube video URl
* - user_id, user_name
* - thumbs => thumbnail images' URLs
*
*/
public function get_videos_summary($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 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 = $query->result_array();
else
return array();
foreach ($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);
}
return $videos;
}
/**
* 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` v, `users` u
WHERE v.user_id = u.id AND $cond_category AND $cond_user");
if ($query->num_rows() > 0)
return $query->row()->count;
// Error
return FALSE;
}
/**
* 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 $name video's `name` column from `videos` DB
* table. NULL means there is no name provided.
* @return array an associative list with information about a video
* with the following keys:
*
* - all columns form DB with some exceptions that are overwritten or new
* - content is moved in assets
* - assets => list of associative lists where each one represents a
* video asset having keys: "src", "res", "par" and "ext". Value of key
* "src" is the video torrent formated as
* {name}_{format}.{video_ext}.{default_torrent_ext}
* - username => user name from `users` table
* - category_title => a human-friendly category name
* - tags => associative list of "tag => score"
* - date => date and time when the video was created
* - thumbs => thumbnail images' URLs
*
*/
public function get_video($id, $name = NULL)
{
$this->load->helper('video');
$this->load->helper('text');
$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)
{
$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['def'] = $def;
$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']);
// Shorted description
$video['shorted_description'] = character_limiter(
$video['description'], 128);
return $video;
}
public function compute_video_name($title)
{
$name = str_replace(' ', '-', $title);
return urlencode($name);
}
/**
* Adds a new uploaded video to the DB.
*
* @param type $title
* @param type $description
* @param type $tags comma separated tags
* @param type $av_info a dictionary of video properties containing keys
* width, height, dar (display aspect ratio), duration and size; is can be
* returned with function get_av_info from video helper
*/
public function add_video($title, $description, $tags, $av_info,
$category_id, $user_id)
{
$name = $this->compute_video_name($title);
// Tags.
$json_tags = array();
$tok = strtok($tags, ',');
while ($tok != FALSE)
{
$json_tags[trim($tok)] = 0;
$tok = strtok(',');
}
$json_tags = json_encode($json_tags);
// TODO formats
$json_formats = '[{"res":"1280x720","ext":"ogv","dar":"16:9"},'
. '{"res":"1067x600","ext":"ogv","dar":"16:9"}]';
$query = $this->db->query("INSERT INTO `videos`
(name, title, description, duration, formats, category_id,
user_id, tags, date)
VALUES ('$name', '$title', '$description', '"
. $av_info['duration']. "', '$json_formats', $category_id,
$user_id, '$json_tags', utc_timestamp())");
if ($query === FALSE)
return FALSE;
// Find out the id of the new video added.
$query = $this->db->query("SELECT id from `videos`
WHERE name = '$name'");
if ($query->num_rows() === 0)
return FALSE;
$video_id = $query->row()->id;
// Activation code.
$activation_code = Videos_model::gen_activation_code();
$query = $this->db->query("INSERT INTO `videos_unactivated`
(video_id, activation_code)
VALUES ($video_id, '$activation_code')");
}
/**
* Retrieves comments for a video.
*
* @param int $video_id
* @param int $offset
* @param int $count
* @param string $ordering control comments ording by these possibilities:
*
* - 'hottest': newest most appreciated first. An
* appreciated comment is one which has a bigger
* score = likes - dislikes.
* - 'newest': newest first.
*
* @return array an array with comments
*/
public function get_video_comments($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 $id DB video id
* @return void
*/
public function inc_views($id)
{
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)
{
$thumbs = array();
for ($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 = search fragment relevance
$sfr = "( ";
$sep = ' +-*<>()~"';
$fragm = strtok($search_query, $sep);
while ($fragm !== FALSE)
{
$sfc .= "(title LIKE '%$fragm%'
OR description LIKE '%$fragm%'
OR tags LIKE '%$fragm%') OR ";
// Frament relevances are half of boolean relevances 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 ($query->num_rows() > 0)
{
if ($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 $search_query;
}
public function encode_search_query($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);
}
public static function gen_activation_code()
{
$ci =& get_instance();
$activation_code = substr(
sha1($ci->config->item('encryption_key')
. mt_rand()),
0,
16);
return $activation_code;
}
}
/* End of file videos_model.php */
/* Location: ./application/models/videos_model.php */