szurubooru/src/Dao/SnapshotDao.php

<?php
namespace Szurubooru\Dao;
use Szurubooru\Dao\EntityConverters\SnapshotEntityConverter;
use Szurubooru\Dao\UserDao;
use Szurubooru\DatabaseConnection;
use Szurubooru\Entities\Entity;
use Szurubooru\Entities\Snapshot;

class SnapshotDao extends AbstractDao
{
	private $userDao;

	public function __construct(
		DatabaseConnection $databaseConnection,
		UserDao $userDao)
	{
		parent::__construct(
			$databaseConnection,
			'snapshots',
			new SnapshotEntityConverter());

		$this->userDao = $userDao;
	}

	public function findEarlierSnapshots(Snapshot $snapshot)
	{
		$query = $this->pdo
			->from($this->tableName)
			->where('type', $snapshot->getType())
			->where('primaryKey', $snapshot->getPrimaryKey())
			->orderBy('time DESC');

		if ($snapshot->getId())
			$query->where('id < ?', $snapshot->getId());

		return $this->arrayToEntities(iterator_to_array($query));
	}

	public function afterLoad(Entity $snapshot)
	{
		$snapshot->setLazyLoader(
			Snapshot::LAZY_LOADER_USER,
			function (Snapshot $snapshot)
			{
				return $this->getUser($snapshot);
			});
	}

	private function getUser(Snapshot $snapshot)
	{
		$userId =  $snapshot->getUserId();
		return $this->userDao->findById($userId);
	}
}