<?php
/*
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * This software consists of voluntary contributions made by many individuals
 * and is licensed under the MIT license. For more information, see
 * <http://www.doctrine-project.org>.
 */

namespace Doctrine\ORM\Persisters\Collection;

use Doctrine\ORM\EntityManagerInterface;
use Doctrine\ORM\UnitOfWork;

/**
 * Base class for all collection persisters.
 *
 * @since 2.0
 * @author Roman Borschel <roman@code-factory.org>
 */
abstract class AbstractCollectionPersister implements CollectionPersister
{
    /**
     * @var EntityManagerInterface
     */
    protected $em;

    /**
     * @var \Doctrine\DBAL\Connection
     */
    protected $conn;

    /**
     * @var UnitOfWork
     */
    protected $uow;

    /**
     * The database platform.
     *
     * @var \Doctrine\DBAL\Platforms\AbstractPlatform
     */
    protected $platform;

    /**
     * The quote strategy.
     *
     * @var \Doctrine\ORM\Mapping\QuoteStrategy
     */
    protected $quoteStrategy;

    /**
     * Initializes a new instance of a class derived from AbstractCollectionPersister.
     *
     * @param EntityManagerInterface $em
     */
    public function __construct(EntityManagerInterface $em)
    {
        $this->em               = $em;
        $this->uow              = $em->getUnitOfWork();
        $this->conn             = $em->getConnection();
        $this->platform         = $this->conn->getDatabasePlatform();
        $this->quoteStrategy    = $em->getConfiguration()->getQuoteStrategy();
    }

    /**
     * Check if entity is in a valid state for operations.
     *
     * @param object $entity
     *
     * @return bool
     */
    protected function isValidEntityState($entity)
    {
        $entityState = $this->uow->getEntityState($entity, UnitOfWork::STATE_NEW);

        if ($entityState === UnitOfWork::STATE_NEW) {
            return false;
        }

        // If Entity is scheduled for inclusion, it is not in this collection.
        // We can assure that because it would have return true before on array check
        if ($entityState === UnitOfWork::STATE_MANAGED && $this->uow->isScheduledForInsert($entity)) {
            return false;
        }

        return true;
    }
}