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<?php
/*
Copyright (c) 2001 - 2007 Ampache.org
All rights reserved.
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License v2
as published by the Free Software Foundation.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
/**
* Rating class
* This is an amalgamation(sp?) of code from SoundOfEmotion
* to track ratings for songs, albums and artists.
*/
class Rating {
/* Provided vars */
var $id; // The ID of the object who's ratings we want to pull
var $type; // The type of object we want
/* Generated vars */
var $rating; // The average rating as set by all users
/**
* Constructor
* This is run every time a new object is created, it requires
* the id and type of object that we need to pull the raiting for
*/
function Rating($id,$type) {
$this->id = intval($id);
$this->type = sql_escape($type);
// Check for the users rating
if ($rating = $this->get_user($GLOBALS['user']->id)) {
$this->rating = $rating;
}
else {
$this->get_average();
}
return true;
} // Rating
/**
* get_user
* Get the user's rating this is based off the currently logged
* in user. It returns the value
*/
function get_user($user_id) {
$user_id = sql_escape($user_id);
$sql = "SELECT rating FROM ratings WHERE user='$user_id' AND object_id='$this->id' AND object_type='$this->type'";
$db_results = mysql_query($sql, dbh());
$results = mysql_fetch_assoc($db_results);
return $results['rating'];
} // get_user
/**
* get_average
* Get the users average rating this is based off the floor'd average
* of what everyone has rated this album as. This is shown if there
* is no personal rating, and used for random play mojo. It sets
* $this->average_rating and returns the value
*/
function get_average() {
$sql = "SELECT user_rating as rating FROM ratings WHERE object_id='$this->id' AND object_type='$this->type'";
$db_results = mysql_query($sql, dbh());
$i = 0;
while ($r = mysql_fetch_assoc($db_results)) {
$i++;
$total += $r['rating'];
} // while we're pulling results
if ($total > 0) {
$average = floor($total/$i);
$this->rating = $average;
}
elseif ($i >= '1' AND $total == '0') {
$this->rating = '-1';
}
else {
$this->rating = '0';
}
return $average;
} // get_average
/**
* set_rating
* This function sets a rating for the current $this object.
* This uses the currently logged in user for the 'user' who is rating
* the object. Returns true on success, false on failure
*/
function set_rating($score) {
$score = sql_escape($score);
/* Check if it exists */
$sql = "SELECT id FROM ratings WHERE object_id='$this->id' AND object_type='$this->type' AND `user`='" . sql_escape($GLOBALS['user']->username) . "'";
$db_results = mysql_query($sql, dbh());
if ($existing = mysql_fetch_assoc($db_results)) {
$sql = "UPDATE ratings SET user_rating='$score' WHERE id='" . $existing['id'] . "'";
$db_results = mysql_query($sql, dbh());
}
else {
$sql = "INSERT INTO ratings (`object_id`,`object_type`,`user_rating`,`user`) VALUES " .
" ('$this->id','$this->type','$score','" . sql_escape($GLOBALS['user']->username) . "')";
$db_results = mysql_query($sql, dbh());
}
return true;
} // set_rating
} //end rating class
?>
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