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gyro/core/view/templateengines/core/templateengine.core.php

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<?php
require_once dirname(__FILE__) . '/../simple/templateengine.simple.php';

/**
 * Template engines that introduces new syntax
 * 
 * @code
 * <?={statement}[;]?>
 * @endcode
 * 
 * will get translated to 
 * 
 * <?php print String::escape({statement})[;]?>
 * 
 * Examples:
 * 
 * @code
 * <?=$var; ?> becomes <?php print String::escape($var); ?>
 * <?=ActionMapper::action_url('view', $item)?> becomes <?php print String::escape(ActionMapper::action_url('view', $item))?>
 * <?=$a; print $b; ?> becomes <?php print String::escape($a); print $b; ?>
 * @endcode
 * 
 * Additionally you can include templates using this syntax:
 * 
 * @code
 * <?php gyro_include_template({template_name}) ?>
 * @encode
 * 
 * @attention The statement "gyro_include_template" must be enclosed by <?php and ?>!
 * 
 * @author Gerd Riesselmann
 * @ingroup View
 */
class TemplateEngineCore extends TemplateEngineSimple {
        /**
         * Resolve template path
         *
         * @param string $file
         * @return string
         */
        protected function resolve_path($file) {
                $file_path = parent::resolve_path($file); 
                $compile_path = $this->get_compile_name($file_path);
                if (!file_exists($compile_path)) {
                        $this->compile($compile_path, $file_path);
                }
                else if (filemtime($compile_path) < filemtime($file_path)) {
                        $this->compile($compile_path, $file_path);
                }
                return $compile_path;
        }
        
        protected function get_compile_name($file) {
                $path = str_replace('.tpl.php', '', $file);
                foreach(Load::get_base_directories() as $dir) {
                        $path = str_replace($dir, '', $path); 
                }
                $path = str_replace('view/templates/', '', $path);
                $pos = strpos($path, '/');
                $path = substr($path, $pos + 1);
                return Config::get_value(Config::TEMP_DIR) . 'view/templates_c/' . str_replace('/', '-', $path) . '-' . md5($file) . '.tpl-c.php';
        }
        
        protected function compile($compile_path, $source_path) {
                $c = file_get_contents($source_path);

                // Resolve includes
                $c = $this->resolve_includes($c);       
                
                // Repalce <?=  with <?php print String:.escape()
                $c = $this->resolve_quick_tags($c);
                file_put_contents($compile_path, $c);
        }
        
        /**
         * Resolve quick tags <?=...?>
         * 
         * Replaces <?=...  with <?php print String::escape(...)
         * 
         * @param string $content
         * @return string
         */ 
        protected function resolve_quick_tags($content) {
                $regex = '@(<\?=)(.*?)(;|\?>)@';
                $rep = '<?php print String::escape($2)$3';
                return String::preg_replace($regex, $rep, $content);            
        }
        
        /**
         * Resolve gyro_include_template('path')
         *
         * @param string $content
         * @return string
         */
        protected function resolve_includes($content) {
                $regex = '@(<\?php(.*?))gyro_include_template\((.*?)\)(.*?)(\?>)@';
                $matches = array();
                while (preg_match($regex, $content, $matches)) {
                        //$include_file = trim($matches[3], '"\'');
                        //$include_file_path = parent::resolve_path($include_file);
                        //if (!file_exists($include_file_path)) {
                        //      throw new Exception(tr('Include Template File Not Found: %t', 'core', array('%t' => $include_file)));
                        //}
                        //$rep = '';
                        $rep = '$1include($this->resolve_path($3))$4$5';
                        $content = preg_replace($regex, $rep, $content, 1);
                }
                
                return $content;
        }
}

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