ValueObject

ValueObject.php

<?php
declare(strict_types=1);

class StringVO {
  protected $value; // string
  function __construct(string $value) {
    $this->value = $value;
  }
  public function getValue(): string {
    return $this->value;
  }
}
class DateTimeVO {
  protected $value; // DateTime
  function __construct(DateTime $value) {
    $value->setTimeZone(new DateTimeZone('Asia/Tokyo'));
    $this->value = $value;
  }

   public function getValue(): DateTime {
     return $this->value;
   }

   public function getISO8601Value(): String {
     return $this->value->format(DateTime::ISO8601);
   }

   public function getUnixTimestampValue(): int {
     return $this->value->getTimestamp();
   }

   public function getApiValue(): array {
     return array(
       "ISO8601" => $this->getISO8601Value(),
       "unix" => $this->getUnixTimestampValue()
     );
   }

   public function getDbValue(): int {
     return $this->value->getTimestamp();
   }
}

class UnixTimestampVO {
  protected $value; // DateTime
  function __construct(int $value) {
    $this->value = $value;
  }

   public function getValue(): int {
     return $this->value;
   }

   public function toDateTime(): DateTime {
     return new DateTime('@' . $this->getValue());
   }
}

class CurrentDateTime extends DateTimeVO {

}

class DateTimeFactory {
  private $datetime;
  function __construct() {
    $this->datetime = new DateTime();
  }
  function createDateTime(): DateTime {
    return $this->datetime;
  }

  function createCurrentDateTime(): CurrentDateTime {
    return new CurrentDateTime($this->datetime);
  }
}