/**
* Calculates the new rating
*
* @param class_module_rating_rate $objSourceRate The rating-record to update
* @param float $floatNewRating The rating fired by the user
*
* @return float the new rating
*/
public function doRating(class_module_rating_rate $objSourceRate, $floatNewRating)
{
//calc the rating's midpoint depending on the maximum rating value
$floatRatingMidpoint = (class_module_rating_rate::$intMaxRatingValue + 1) / 2;
$floatAssessedRating = 0;
if ($floatNewRating == $floatRatingMidpoint) {
//the rating exactly matches the average rating value
//it doesn't need to be assessed
$floatAssessedRating = $floatNewRating;
} else {
//determine the interval between assessed ratings
//the number 0.5 is to the maximum change which is applied to a rating during assessment
//a more probable rating and a higher number of ratings will make this interval less meaningful
$floatAssessmentInterval = 0.5 / ($floatRatingMidpoint - 1);
//calc the assessment on the current rating
$floatAssessedRating = ($floatRatingMidpoint - $floatNewRating) * $floatAssessmentInterval + $floatNewRating;
//add or subtract a bonus depending on the number of already existing ratings
$intAdditionSign = 1;
if ($floatNewRating < $floatRatingMidpoint) {
$intAdditionSign = -1;
}
$floatAssessedRating = $floatAssessedRating + $intAdditionSign * ($objSourceRate->getIntHits() / class_module_rating_algo_gaussian::$intAssessmentSoftenerFactor * 2);
//reset the final assessed ratings if they should exceed the user's rating
//this could only happen with a high number of ratings on an object
if ($floatNewRating < $floatRatingMidpoint && $floatAssessedRating < $floatNewRating || $floatNewRating > $floatRatingMidpoint && $floatAssessedRating > $floatNewRating) {
$floatAssessedRating = $floatNewRating;
}
}
//calc the new rating
$floatNewRating = ($objSourceRate->getFloatRating() * $objSourceRate->getIntHits() + $floatAssessedRating) / ($objSourceRate->getIntHits() + 1);
return $floatNewRating;
}
/**
* Calculates the new rating
*
* @param class_module_rating_rate $objSourceRate The rating-record to update
* @param float $floatNewRating The rating fired by the user
*
* @return float the new rating
*/
public function doRating(class_module_rating_rate $objSourceRate, $floatNewRating)
{
//calc the new rating
$floatNewRating = ($objSourceRate->getFloatRating() * $objSourceRate->getIntHits() + $floatNewRating) / ($objSourceRate->getIntHits() + 1);
return $floatNewRating;
}
