/**
* How much money you owe to the person.
* @param User::id
*/
public function owe($receiver_id)
{
$toPay = 0;
$toGetPaid = 0;
$receiver = User::findOrFail($receiver_id);
foreach ($receiver->expenses as $expense) {
$groupevent = Groupevent::findOrFail($expense->groupevent_id);
if ($groupevent->participants()->contains('id', $this->id) and $groupevent->paid == false) {
$toPay += $expense->cost / $groupevent->participants()->count();
}
}
foreach ($this->expenses as $expense) {
$groupevent = Groupevent::findOrFail($expense->groupevent_id);
if ($groupevent->participants()->contains('id', $receiver->id) and $groupevent->paid == false) {
$toGetPaid += $expense->cost / $groupevent->participants()->count();
}
}
return $toPay - $toGetPaid;
}
