public function compare($one, $two)
{
if( !($one instanceof Item) )
{
if( is_integer($one) )
{
$one = Item::getByID($one);
}
else
{
return false;
}
}
if( !($two instanceof Item) )
{
if( is_integer($two) )
{
$two = Item::getByID($two);
}
else
{
return false;
}
}
$ratings[0] = Rating::getByUserForItem($this->user->userid, $one->itemid);
$ratings[1] = Rating::getByUserForItem($this->user->userid, $two->itemid);
$views[0] = View::getByUserForItem($this->user->userid, $one->itemid);
$views[1] = View::getByUserForItem($this->user->userid, $two->itemid);
$willTheyLikeTwoComparedToOne = 0;
//first, try to compare ratings
if( $ratings[0] || $ratings[1] )
{
if( $ratings[0] && $ratings[1] )
{
//only use the first rating because if there's more than one that's bullshit.
$oneRate = Base::toArray($ratings[0]);
$oneRate = $oneRate[0];
$twoRate = Base::toArray($ratings[1]);
$twoRate = $twoRate[0];
if( $oneRate == 0 )
{
$oneRate = .0000000000000001;
}
if( $twoRate == 0 )
{
$twoRate = .0000000000000001;
}
$oneRate = 1 / $oneRate->rating;
$twoRate = 1 / $twoRate->rating;
$diff = $oneRate - $twoRate;
}
else
{
//one item doesn't have ratings
//don't do anything right now.
}
$willTheyLikeTwoComparedToOne += $diff * .1;
}
else
{
//no ratings for either item
}
//try to compare number of views
//people are more likely to view something if they want it (even subconsciously)
//so the comparison of views could offer a rough estimate
if( $views[0] || $views[1] )
{
if( $views[0] && $views[1] )
{
//get counts
$vwOne = count(Base::toArray($views[0]));
$vwTwo = count(Base::toArray($views[1])); // ah, vwTwo, the most difficult Pokemon to catch.
//close or equal
if( ( $vwTwo - 1 < $vwOne ) && ( $vwTwo < $vwTwo + 1 ) )
{
//bump up the likelihood
$willTheyLikeTwoComparedToOne += .05;
}
elseif( $vwTwo < $vwOne )
{
//maybe not
$willTheyLikeTwoComparedToOne -= .05;
}
else
{
//very likely
$willTheyLikeTwoComparedToOne += .1;
}
}
else
{
//one of the items hasn't been viewed
//don't do anything right now.
}
}
else
{
//The user has no views for either item
}
return $willTheyLikeTwoComparedToOne;
}
