/**
* Sum the amounts of the entries matching the given account,
* or null if no match is found.
*
* The given account must be comparable.
*
* @param ComparableInterface $account
* @return MoneyInterface|null
*/
public function sumByAccount(ComparableInterface $account)
{
/* @var $money MoneyInterface */
$money = null;
/* @var $entry EntryInterface */
foreach ($this as $entry) {
if ($account->equalTo($entry->getAccount()) && $entry->getAmount()) {
$money = $money === null ? clone $entry->getAmount() : $money->add($entry->getAmount());
}
}
return $money;
}
/**
* Extract from current collection the first entry matching the given account,
* or null if no match is found.
*
* The given account must be comparable.
*
* @param ComparableInterface $account
* @return EntryInterface
*/
public function getByAccount(ComparableInterface $account)
{
/* @var $entry EntryInterface */
foreach ($this as $entry) {
if ($account->equalTo($entry->getAccount())) {
return $entry;
}
}
return null;
}
