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user_rating_save()

Description

Saves a user rating for a given resource.

Parameters

ColumnTypeDefaultDescription
$userref int The reference ID of the user rating the resource.
$ref int The reference ID of the resource being rated.
$rating int The rating value to be saved (0 to remove rating).

Return

void

Location

include/resource_functions.php lines 5243 to 5310

Definition

 
function user_rating_save($userref,$ref,$rating)
    {
    # Save a user rating for a given resource
    $resource=get_resource_data($ref);

    # Recalculate the averate rating
    $total=$resource["user_rating_total"]; if ($total=="") {$total=0;}
    $count=$resource["user_rating_count"]; if ($count=="") {$count=0;}

    # modify behavior to allow only one current rating per user (which can be re-edited)
    global $user_rating_only_once;
    if ($user_rating_only_once)
        {
        $ratings=ps_query("select user,rating from user_rating where ref=?",array("i",$ref));

        #Calculate ratings total and get current rating for user if available
        $total=0;
        $current="";
        for ($n=0;$n<count($ratings);$n++){
            $total+=$ratings[$n]['rating'];

            if ($ratings[$n]['user']==$userref){
                $current=$ratings[$n]['rating'];
                }
            }
        # Calculate Count
        $count=count($ratings);

        # if user has a current rating, subtract the old rating and add the new one.
        if ($current!=""){
            $total=$total-$current+$rating;
            if ($rating == 0) {  //rating remove feature
                ps_query("delete from user_rating where user=? and ref=?",array("i",$userref,"i",$ref));
                $count--;
            } else {
                ps_query("update user_rating set rating=? where user=? and ref=?",array("i",$rating,"i",$userref,"i",$ref));
            }
        }

        # if user does not have a current rating, add it
        else
            {
            if ($rating != 0)
                { // rating remove feature
                $total=$total+$rating;
                $count++;
                ps_query("insert into user_rating (user,ref,rating) values (?,?,?)",array("i",$userref,"i",$ref,"i",$rating));
                }
            }
        }
    else
        {
        # If not using $user_rating_only_once, Increment the total and count
        $total+=$rating;
        $count++;
        }

    if ($count==0){
        # avoid division by zero
        $average=$total;
    } else {
    # work out a new average.
    $average=ceil($total/$count);
    }

    # Save to the database
    ps_query("UPDATE resource SET user_rating = ?, user_rating_total = ?, user_rating_count = ? WHERE ref = ?", array("d", $average, "i", $total, "i", $count, "i", $ref));
    }

This article was last updated 15th December 2024 15:35 Europe/London time based on the source file dated 13th December 2024 14:45 Europe/London time.