<?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 LGPL. For more information, see
 * <http://www.doctrine-project.org>.
 */

namespace Doctrine\ODM\MongoDB\Mapping\Driver;

use Doctrine\ODM\MongoDB\Mapping\ClassMetadata;

/**
 * The PHPDriver invokes a static PHP function on the document class itself passing
 * a ClassMetadata instance for you to manually populate with mapping information.
 *
 * @license     http://www.opensource.org/licenses/lgpl-license.php LGPL
 * @link        www.doctrine-project.org
 * @since       1.0
 * @author      Jonathan H. Wage <hide@address.com>
 * @author      Roman Borschel <hide@address.com>
 */
class PHPDriver implements Driver
{
    private $paths = array();

    public function __construct($paths)
    {
        $this->addPaths((array) $paths);
    }

    public function addPaths(array $paths)
    {
        $this->paths = array_unique(array_merge($this->paths, $paths));
    }

    /**
     * {@inheritdoc}
     */
    public function loadMetadataForClass($className, ClassMetadata $metadata)
    {
        call_user_func_array(array($className, 'loadMetadata'), array($metadata));
    }
    
    /**
     * {@inheritDoc}
     * @todo Same code exists in AnnotationDriver, should we re-use it somehow or not worry about it?
     */
    public function getAllClassNames()
    {
        if ($this->classNames !== null) {
            return $this->classNames;
        }

        if (!$this->paths) {
            throw MongoDBException::pathRequired();
        }

        $classes = array();
        $includedFiles = array();

        foreach ($this->paths as $path) {
            if ( ! is_dir($path)) {
                throw MongoDBException::fileMappingDriversRequireConfiguredDirectoryPath();
            }

            $iterator = new \RecursiveIteratorIterator(
                new \RecursiveDirectoryIterator($path),
                \RecursiveIteratorIterator::LEAVES_ONLY
            );

            foreach ($iterator as $file) {
                if (($fileName = $file->getBasename($this->fileExtension)) == $file->getBasename()) {
                    continue;
                }

                $sourceFile = realpath($file->getPathName());
                require_once $sourceFile;
                $includedFiles[] = $sourceFile;
            }
        }

        $declared = get_declared_classes();

        foreach ($declared as $className) {
            $rc = new \ReflectionClass($className);
            $sourceFile = $rc->getFileName();
            if (in_array($sourceFile, $includedFiles) && ! $this->isTransient($className)) {
                $classes[] = $className;
            }
        }

        $this->classNames = $classes;

        return $classes;
    }

    /**
     * {@inheritdoc}
     */
    public function isTransient($className)
    {
        return method_exists($className, 'loadMetadata') ? false : true;
    }
}