<?php


/**
 * Category
 *
 * @property integer $id
 * @property \Carbon\Carbon $created_at
 * @property \Carbon\Carbon $updated_at
 * @property string $name
 * @property integer $user_id
 * @property string $class
 * @property-read \Illuminate\Database\Eloquent\Collection|\TransactionJournal[] $transactionjournals
 * @property-read \Illuminate\Database\Eloquent\Collection|\Limit[] $limits
 * @property-read \Illuminate\Database\Eloquent\Collection|\Transaction[] $transactions
 * @property-read \User $user
 * @method static \Illuminate\Database\Query\Builder|\Category whereId($value) 
 * @method static \Illuminate\Database\Query\Builder|\Category whereCreatedAt($value) 
 * @method static \Illuminate\Database\Query\Builder|\Category whereUpdatedAt($value) 
 * @method static \Illuminate\Database\Query\Builder|\Category whereName($value) 
 * @method static \Illuminate\Database\Query\Builder|\Category whereUserId($value) 
 * @method static \Illuminate\Database\Query\Builder|\Category whereClass($value) 
 */
class Category extends Component
{
    protected $isSubclass = true;

    /**
     * @return Carbon
     */
    public function lastActionDate()
    {
        $transaction = $this->transactionjournals()->orderBy('updated_at', 'DESC')->first();
        if (is_null($transaction)) {
            return null;
        }

        return $transaction->date;
    }

    /**
     * @return \Illuminate\Database\Eloquent\Relations\BelongsToMany
     */
    public function transactionjournals()
    {
        return $this->belongsToMany('TransactionJournal', 'component_transaction_journal', 'component_id');
    }
}