firefly-iii/app/Models/TransactionType.php

<?php
/**
 * TransactionType.php
 * Copyright (C) 2016 thegrumpydictator@gmail.com
 *
 * This software may be modified and distributed under the terms
 * of the MIT license.  See the LICENSE file for details.
 */

declare(strict_types = 1);

namespace FireflyIII\Models;

use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\SoftDeletes;

/**
 * FireflyIII\Models\TransactionType
 *
 * @property integer                                                            $id
 * @property \Carbon\Carbon                                                     $created_at
 * @property \Carbon\Carbon                                                     $updated_at
 * @property \Carbon\Carbon                                                     $deleted_at
 * @property string                                                             $type
 * @property-read \Illuminate\Database\Eloquent\Collection|TransactionJournal[] $transactionJournals
 * @method static \Illuminate\Database\Query\Builder|\FireflyIII\Models\TransactionType whereId($value)
 * @method static \Illuminate\Database\Query\Builder|\FireflyIII\Models\TransactionType whereCreatedAt($value)
 * @method static \Illuminate\Database\Query\Builder|\FireflyIII\Models\TransactionType whereUpdatedAt($value)
 * @method static \Illuminate\Database\Query\Builder|\FireflyIII\Models\TransactionType whereDeletedAt($value)
 * @method static \Illuminate\Database\Query\Builder|\FireflyIII\Models\TransactionType whereType($value)
 * @mixin \Eloquent
 */
class TransactionType extends Model
{
    use SoftDeletes;

    const WITHDRAWAL      = 'Withdrawal';
    const DEPOSIT         = 'Deposit';
    const TRANSFER        = 'Transfer';
    const OPENING_BALANCE = 'Opening balance';

    protected $dates = ['created_at', 'updated_at', 'deleted_at'];

    /**
     * @return bool
     */
    public function isDeposit()
    {
        return $this->type === TransactionType::DEPOSIT;
    }

    /**
     * @return bool
     */
    public function isOpeningBalance()
    {
        return $this->type === TransactionType::OPENING_BALANCE;
    }

    /**
     * @return bool
     */
    public function isTransfer()
    {
        return $this->type === TransactionType::TRANSFER;
    }

    /**
     * @return bool
     */
    public function isWithdrawal()
    {
        return $this->type === TransactionType::WITHDRAWAL;
    }

    /**
     *
     * @return \Illuminate\Database\Eloquent\Relations\HasMany
     */
    public function transactionJournals()
    {
        return $this->hasMany('FireflyIII\Models\TransactionJournal');
    }
}