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<?php
/* --------------------------------------------------------------
   GXSmarty.inc.php 2017-11-02
   Gambio GmbH
   http://www.gambio.de
   Copyright (c) 2017 Gambio GmbH
   Released under the GNU General Public License (Version 2)
   [http://www.gnu.org/licenses/gpl-2.0.html]
   --------------------------------------------------------------
*/

class GXSmarty extends SmartyBC
{
    /**
     * GXSmarty constructor.
     */
    public function __construct()
    {
        parent::__construct();
        $this->registerPlugin('block', 'php', 'smarty_php_tag');
        $this->setConfigDir('.' . DIRECTORY_SEPARATOR . 'lang' . DIRECTORY_SEPARATOR);
    }
    
    
    /**
     * creates a template object
     *
     * @param  string  $template   the resource handle of the template file
     * @param  mixed   $cache_id   cache id to be used with this template
     * @param  mixed   $compile_id compile id to be used with this template
     * @param  object  $parent     next higher level of Smarty variables
     * @param  boolean $do_clone   flag is Smarty object shall be cloned
     *
     * @return object  template object
     */
    public function createTemplate($template, $cache_id = null, $compile_id = null, $parent = null, $do_clone = true)
    {
        $template = $this->_getGambioUsermodFilePath($template);
        
        return parent::createTemplate($template, $cache_id, $compile_id, $parent, $do_clone);
    }
    
    
    /**
     * trigger Smarty error
     *
     * @param string  $error_msg
     * @param integer $error_type
     */
    public function trigger_error($error_msg, $error_type = E_USER_WARNING)
    {
        $msg = htmlentities_wrapper($error_msg);
        trigger_error("Smarty error: $msg", $error_type);
    }
    
    /**
     * This method checks if a USERMOD of the given template exists and replaces it with the USERMOD
     *
     * @param $p_template
     *
     * @return string
     */
    protected function _getGambioUsermodFilePath($p_template)
    {
        $t_template = str_replace('\\', '/', $p_template);
        
        // try absolute path
        $usermodFilePath = get_usermod($t_template);
        if($usermodFilePath != $t_template)
        {
            return $usermodFilePath;
        }
        
        if((defined('DIR_FS_CATALOG') && strpos($t_template, DIR_FS_CATALOG) !== 0)
           || defined('DIR_FS_CATALOG') == false
        )
        {
            // try relative path
            $templateDir = (is_array($this->template_dir) ? $this->template_dir[0] : $this->template_dir) . '/';
            if(strpos($t_template, $templateDir) === 0)
            {
                $templateDir = '';
            }
            
            $usermodFilePath = get_usermod($templateDir . $t_template);
            if($usermodFilePath != $templateDir . $t_template)
            {
                return $usermodFilePath;
            }
        }
        
        // no usermod-resource found. return original
        return $t_template;
    }
}

/**
 * Smarty {php}{/php} block function
 *
 * @param array   $params   parameter list
 * @param string  $content  contents of the block
 * @param object  $template template object
 * @param boolean &$repeat  repeat flag
 *
 * @return string content re-formatted
 */
function smarty_php_tag($params, $content, $template, &$repeat)
{
    eval($content);
    
    return '';
}