<?php

namespace bff\modules\geo\models;

use Geo;
use bff\db\illuminate\Model;
use bff\db\illuminate\LangsColumns;

/**
 * Geo: region city metro branch model
 * @copyright Tamaranga
 */
class MetroBranch extends Model
{
    use LangsColumns;

    protected $table = Geo::TABLE_REGIONS_METRO_BRANCHES;

    public $timestamps = false;

    public function langColumns()
    {
        return ['title'];
    }

    public function stations()
    {
        $in = new MetroStationIn();
        return $this->belongsToMany(MetroStation::class, $in->getTable(), 'branch_id', 'station_id');
    }

    protected static function booted()
    {
        parent::booted();

        static::creating(function ($self) {
            /** @var $self static */
            if (empty($self->num) && ! empty($self->city_id)) {
                $self->num = (int)$self->where('city_id', $self->city_id)->max('num') + 1;
            }
        });
    }
}