<?php
namespace ProVM\Money;

use Carbon\CarbonInterval;
use ProVM\Common\Alias\Model;

/**
 * @property int $id
 * @property Currency $currency_id
 * @property string $url
 * @property \DateInterval $frecuency
 */
class Source extends Model {
  protected $currency;
  public function currency(): ?Currency {
    if ($this->currency === null) {
      $this->currency = $this->childOf(Currency::class, [Model::SELF_KEY => 'currency_id']);
    }
    return $this->currency;
  }
  public function frecuency(\DateInterval $frecuency = null) {
    if ($frecuency == null) {
      return new \CarbonInterval($this->fecuency);
    }
    $this->frecuency = CarbonInterval::getDateIntervalSpec($frecuency);
  }
}