<?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\Tools\Console\Command\ClearCache;

use Symfony\Component\Console\Command\Command;
use Symfony\Component\Console\Input\InputOption;
use Symfony\Component\Console\Input\InputInterface;
use Symfony\Component\Console\Output\OutputInterface;
use Doctrine\Common\Cache\ApcCache;

/**
 * Command to clear the metadata cache of the various cache drivers.
 *
 * @link    www.doctrine-project.org
 * @since   2.0
 * @author  Benjamin Eberlei <kontakt@beberlei.de>
 * @author  Guilherme Blanco <guilhermeblanco@hotmail.com>
 * @author  Jonathan Wage <jonwage@gmail.com>
 * @author  Roman Borschel <roman@code-factory.org>
 */
class MetadataCommand extends Command
{
    /**
     * {@inheritdoc}
     */
    protected function configure()
    {
        $this
        ->setName('orm:clear-cache:metadata')
        ->setDescription('Clear all metadata cache of the various cache drivers.')
        ->setDefinition(array(
            new InputOption(
                'flush', null, InputOption::VALUE_NONE,
                'If defined, cache entries will be flushed instead of deleted/invalidated.'
            )
        ));

        $this->setHelp(<<<EOT
The <info>%command.name%</info> command is meant to clear the metadata cache of associated Entity Manager.
It is possible to invalidate all cache entries at once - called delete -, or flushes the cache provider
instance completely.

The execution type differ on how you execute the command.
If you want to invalidate the entries (and not delete from cache instance), this command would do the work:

<info>%command.name%</info>

Alternatively, if you want to flush the cache provider using this command:

<info>%command.name% --flush</info>

Finally, be aware that if <info>--flush</info> option is passed, not all cache providers are able to flush entries,
because of a limitation of its execution nature.
EOT
        );
    }

    /**
     * {@inheritdoc}
     */
    protected function execute(InputInterface $input, OutputInterface $output)
    {
        $em = $this->getHelper('em')->getEntityManager();
        $cacheDriver = $em->getConfiguration()->getMetadataCacheImpl();

        if ( ! $cacheDriver) {
            throw new \InvalidArgumentException('No Metadata cache driver is configured on given EntityManager.');
        }

        if ($cacheDriver instanceof ApcCache) {
            throw new \LogicException("Cannot clear APC Cache from Console, its shared in the Webserver memory and not accessible from the CLI.");
        }

        $output->writeln('Clearing ALL Metadata cache entries');

        $result  = $cacheDriver->deleteAll();
        $message = ($result) ? 'Successfully deleted cache entries.' : 'No cache entries were deleted.';

        if (true === $input->getOption('flush')) {
            $result  = $cacheDriver->flushAll();
            $message = ($result) ? 'Successfully flushed cache entries.' : $message;
        }

        $output->writeln($message);
    }
}
