<?php

/*

 * This file is part of Twig.

 *

 * (c) 2009 Fabien Potencier

 *

 * For the full copyright and license information, please view the LICENSE

 * file that was distributed with this source code.

 */

/**

 * Loads a template from an array.

 *

 * When using this loader with a cache mechanism, you should know that a new cache

 * key is generated each time a template content "changes" (the cache key being the

 * source code of the template). If you don't want to see your cache grows out of

 * control, you need to take care of clearing the old cache file by yourself.

 *

 * @package    twig

 * @author     Fabien Potencier <fabien@symfony.com>

 */

class Twig_Loader_Array implements Twig_LoaderInterface

{

    protected $templates;

    /**

     * Constructor.

     *

     * @param array $templates An array of templates (keys are the names, and values are the source code)

     *

     * @see Twig_Loader

     */

    public function __construct(array $templates)

    {

        $this->templates = array();

        foreach ($templates as $name => $template) {

            $this->templates[$name] = $template;

        }

    }

    /**

     * Gets the source code of a template, given its name.

     *

     * @param  string $name The name of the template to load

     *

     * @return string The template source code

     */

    public function getSource($name)

    {

        if (!isset($this->templates[$name])) {

            throw new Twig_Error_Loader(sprintf('Template "%s" is not defined.', $name));

        }

        return $this->templates[$name];

    }

    /**

     * Gets the cache key to use for the cache for a given template name.

     *

     * @param  string $name The name of the template to load

     *

     * @return string The cache key

     */

    public function getCacheKey($name)

    {

        if (!isset($this->templates[$name])) {

            throw new Twig_Error_Loader(sprintf('Template "%s" is not defined.', $name));

        }

        return $this->templates[$name];

    }

    /**

     * Returns true if the template is still fresh.

     *

     * @param string    $name The template name

     * @param timestamp $time The last modification time of the cached template

     */

    public function isFresh($name, $time)

    {

        return true;

    }

}