<?php

/**

 * Smarty Internal Plugin Resource Extends

 *

 * @package    Smarty

 * @subpackage TemplateResources

 * @author     Uwe Tews

 * @author     Rodney Rehm

 */

/**

 * Smarty Internal Plugin Resource Extends

 * Implements the file system as resource for Smarty which {extend}s a chain of template files templates

 *

 * @package    Smarty

 * @subpackage TemplateResources

 */

class Smarty_Internal_Resource_Extends extends Smarty_Resource {

    /**

     * mbstring.overload flag

     *

     * @var int

     */

    public $mbstring_overload = 0;

    /**

     * populate Source Object with meta data from Resource

     *

     * @param Smarty_Template_Source $source source object

     * @param Smarty_Internal_Template $_template template object

     *

     * @throws SmartyException

     */

    public function populate(Smarty_Template_Source $source, Smarty_Internal_Template $_template = null) {

        $uid = sha1(getcwd());

        $sources = array();

        $components = explode('|', $source->name);

        $exists = true;

        foreach ($components as $component) {

            $s = Smarty_Resource::source(null, $source->smarty, $component);

            if ($s->type == 'php') {

                throw new SmartyException("Resource type {$s->type} cannot be used with the extends resource type");

            }

            $sources[$s->uid] = $s;

            $uid .= realpath($s->filepath);

            if ($_template && $_template->smarty->compile_check) {

                $exists = $exists && $s->exists;

            }

        }

        $source->components = $sources;

        $source->filepath = $s->filepath;

        $source->uid = sha1($uid);

        if ($_template && $_template->smarty->compile_check) {

            $source->timestamp = $s->timestamp;

            $source->exists = $exists;

        }

        // need the template at getContent()

        $source->template = $_template;

    }

    /**

     * populate Source Object with timestamp and exists from Resource

     *

     * @param Smarty_Template_Source $source source object

     */

    public function populateTimestamp(Smarty_Template_Source $source) {

        $source->exists = true;

        foreach ($source->components as $s) {

            $source->exists = $source->exists && $s->exists;

        }

        $source->timestamp = $s->timestamp;

    }

    /**

     * Load template's source from files into current template object

     *

     * @param Smarty_Template_Source $source source object

     *

     * @return string template source

     * @throws SmartyException if source cannot be loaded

     */

    public function getContent(Smarty_Template_Source $source) {

        if (!$source->exists) {

            throw new SmartyException("Unable to read template {$source->type} '{$source->name}'");

        }

        $_components = array_reverse($source->components);

        $_content = '';

        foreach ($_components as $_component) {

            // read content

            $_content .= $_component->content;

        }

        return $_content;

    }

    /**

     * Determine basename for compiled filename

     *

     * @param Smarty_Template_Source $source source object

     *

     * @return string resource's basename

     */

    public function getBasename(Smarty_Template_Source $source) {

        return str_replace(':', '.', basename($source->filepath));

    }

}