<?php

/**

 * Smarty Internal Extension

 * This file contains the Smarty template extension to create a code frame

 *

 * @package    Smarty

 * @subpackage Template

 * @author     Uwe Tews

 */

/**

 * Class Smarty_Internal_Extension_CodeFrame

 * Create code frame for compiled and cached templates

 */

class Smarty_Internal_Extension_CodeFrame {

    /**

     * Create code frame for compiled and cached templates

     *

     * @param Smarty_Internal_Template $_template

     * @param  string $content optional template content

     * @param  bool $cache flag for cache file

     *

     * @return string

     */

    public static function create(Smarty_Internal_Template $_template, $content = '', $cache = false) {

        // build property code

        $_template->properties['has_nocache_code'] = $_template->has_nocache_code || !empty($_template->required_plugins['nocache']);

        $_template->properties['version'] = Smarty::SMARTY_VERSION;

        if (!isset($_template->properties['unifunc'])) {

            $_template->properties['unifunc'] = 'content_' . str_replace(array('.', ','), '_', uniqid('', true));

        }

        $properties = $_template->properties;

        if (!$cache) {

            unset($properties['tpl_function']);

            if (!empty($_template->compiler->templateProperties)) {

                $properties['tpl_function'] = $_template->compiler->templateProperties['tpl_function'];

            }

        }

        $output = "<?php\n";

        $output .= "/*%%SmartyHeaderCode:{$_template->properties['nocache_hash']}%%*/\n";

        if ($_template->smarty->direct_access_security) {

            $output .= "if(!defined('SMARTY_DIR')) exit('no direct access allowed');\n";

        }

        $output .= "\$_valid = \$_smarty_tpl->decodeProperties(" . var_export($properties, true) . ',' . ($cache ? 'true' : 'false') . ");\n";

        $output .= "/*/%%SmartyHeaderCode%%*/\n";

        $output .= "if (\$_valid && !is_callable('{$_template->properties['unifunc']}')) {\n";

        $output .= "function {$_template->properties['unifunc']} (\$_smarty_tpl) {\n";

        // include code for plugins

        if (!$cache) {

            if (!empty($_template->required_plugins['compiled'])) {

                foreach ($_template->required_plugins['compiled'] as $tmp) {

                    foreach ($tmp as $data) {

                        $file = addslashes($data['file']);

                        if (is_Array($data['function'])) {

                            $output .= "if (!is_callable(array('{$data['function'][0]}','{$data['function'][1]}'))) require_once '{$file}';\n";

                        } else {

                            $output .= "if (!is_callable('{$data['function']}')) require_once '{$file}';\n";

                        }

                    }

                }

            }

            if (!empty($_template->required_plugins['nocache'])) {

                $_template->has_nocache_code = true;

                $output .= "echo '/*%%SmartyNocache:{$_template->properties['nocache_hash']}%%*/<?php \$_smarty = \$_smarty_tpl->smarty; ";

                foreach ($_template->required_plugins['nocache'] as $tmp) {

                    foreach ($tmp as $data) {

                        $file = addslashes($data['file']);

                        if (is_Array($data['function'])) {

                            $output .= addslashes("if (!is_callable(array('{$data['function'][0]}','{$data['function'][1]}'))) require_once '{$file}';\n");

                        } else {

                            $output .= addslashes("if (!is_callable('{$data['function']}')) require_once '{$file}';\n");

                        }

                    }

                }

                $output .= "?>/*/%%SmartyNocache:{$_template->properties['nocache_hash']}%%*/';\n";

            }

        }

        $output .= "?>\n";

        $output = self::appendCode($output, $content);

        return self::appendCode($output, "<?php }\n}\n?>");

    }

    /**

     * Create code frame of compiled template function

     *

     * @param \Smarty_Internal_Template $_template

     * @param string $content

     *

     * @return string

     */

    public static function createFunctionFrame(Smarty_Internal_Template $_template, $content = '') {

        if (!isset($_template->properties['unifunc'])) {

            $_template->properties['unifunc'] = 'content_' . str_replace(array('.', ','), '_', uniqid('', true));

        }

        $output = "<?php\n";

        $output .= "/*%%SmartyHeaderCode:{$_template->properties['nocache_hash']}%%*/\n";

        $output .= "if (\$_valid && !is_callable('{$_template->properties['unifunc']}')) {\n";

        $output .= "function {$_template->properties['unifunc']} (\$_smarty_tpl) {\n";

        $output .= "?>\n" . $content;

        $output .= "<?php\n";

        $output .= "/*/%%SmartyNocache:{$_template->properties['nocache_hash']}%%*/\n";

        $output .= "}\n}\n?>";

        return $output;

    }

    /**

     * Append code segments and remove unneeded ?> <?php transitions

     *

     * @param string $left

     * @param string $right

     *

     * @return string

     */

    public static function appendCode($left, $right) {

        if (preg_match('/\s*\?>$/', $left) && preg_match('/^<\?php\s+/', $right)) {

            $left = preg_replace('/\s*\?>$/', "\n", $left);

            $left .= preg_replace('/^<\?php\s+/', '', $right);

        } else {

            $left .= $right;

        }

        return $left;

    }

}