firefly-iii/app/lib/FireflyIII/Database/Piggybank.php

<?php
namespace FireflyIII\Database;

use Carbon\Carbon;
use Illuminate\Support\MessageBag;
use LaravelBook\Ardent\Ardent;
use Illuminate\Support\Collection;
use FireflyIII\Database\Ifaces\CommonDatabaseCalls;
use FireflyIII\Database\Ifaces\CUD;
use FireflyIII\Database\Ifaces\PiggybankInterface;

/**
 * Class Piggybank
 *
 * @package FireflyIII\Database
 */
class Piggybank implements CUD, CommonDatabaseCalls, PiggybankInterface
{
    use SwitchUser;

    /**
     * @param \Account $account
     *
     * @return float
     */
    public function leftOnAccount(\Account $account)
    {
        $balance = $account->balance();
        /** @var \Piggybank $p */
        foreach ($account->piggybanks()->get() as $p) {
            $balance -= $p->currentRelevantRep()->currentamount;
        }

        return $balance;

    }

    /**
     *
     */
    public function __construct()
    {
        $this->setUser(\Auth::user());
    }

    /**
     * @param Ardent $model
     *
     * @return bool
     */
    public function destroy(Ardent $model)
    {
        // TODO: Implement destroy() method.
    }

    /**
     * Validates a model. Returns an array containing MessageBags
     * errors/warnings/successes.
     *
     * @param Ardent $model
     *
     * @return array
     */
    public function validateObject(Ardent $model)
    {
        // TODO: Implement validateObject() method.
    }

    /**
     * Validates an array. Returns an array containing MessageBags
     * errors/warnings/successes.
     *
     * @param array $model
     *
     * @return array
     */
    public function validate(array $model)
    {
        // TODO: Implement validate() method.
    }

    /**
     * @param array $data
     *
     * @return Ardent
     */
    public function store(array $data)
    {
        // TODO: Implement store() method.
    }

    /**
     * Returns an object with id $id.
     *
     * @param int $id
     *
     * @return Ardent
     */
    public function find($id)
    {
        // TODO: Implement find() method.
    }

    /**
     * Returns all objects.
     *
     * @return Collection
     */
    public function get()
    {
        return $this->getUser()->piggybanks()->where('repeats', 0)->get();
    }

    /**
     * @param array $ids
     *
     * @return Collection
     */
    public function getByIds(array $ids)
    {
        // TODO: Implement getByIds() method.
    }

    /**
     * Finds an account type using one of the "$what"'s: expense, asset, revenue, opening, etc.
     *
     * @param $what
     *
     * @return \AccountType|null
     */
    public function findByWhat($what)
    {
        // TODO: Implement findByWhat() method.
    }
}