Modular Extensions Parser Module

Derek Jones edited this page Jul 5, 2012 · 14 revisions
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Category:Module | Category:Module::Parser

This parser module is designed for use with the Modular_Extensions_-_HMVC system. It allows the use of function calls from inside parsed templates.


<?php if (!defined('BASEPATH')) exit('No direct script access allowed');
/**
* Parser Module for Modular Extensions - HMVC
* 
* Adapted from CodeIgniter Parser Class
* @copyright   Copyright (c) 2006, EllisLab, Inc.
* @license     http://codeigniter.com/user_guide/license.html
* 
* Allows the use of functions in parsed templates ie: {@site_url("home/{page}"}
*
* Version 0.7 (c) Wiredesignz 2008-06-13
**/
class Parser extends Controller
{
    function Parser()
    {
        parent::Controller();
    }

    function parse($view, $data = array())
    {
        if ($template = $this->load->view($view, $data, TRUE)) 
        {            
            $template = $this->_parse($template, $data);

            while(preg_match('/\{\@(\w*)\("??(.*)"??\)\}/siU', $template, $match))
            {
                $template = str_replace($match[0], $match[1]($match[2]), $template);
            }

            return $template;
        }
    }

    function _parse($template, $data)
    {
        foreach ($data as $key => $val)
        {
            if (is_array($val))
            {                
                $template = $this->_parse_pair($key, $val, $template);        
            }
            else
            {
                $template = $this->_parse_single($key, (string)$val, $template);
            }
        }
        return $template;
    }

    function _parse_single($key, $val, $string)
    {
        return str_replace('{'.$key.'}', $val, $string);
    }

    function _parse_pair($variable, $data, $string)
    {    
        if (FALSE === ($match = $this->_match_pair($string, $variable)))
        {
            return $string;
        }

        $str = '';
        foreach ($data as $row)
        {
            $temp = $match['1'];
            foreach ($row as $key => $val)
            {
                if ( ! is_array($val))
                {
                    $temp = $this->_parse_single($key, $val, $temp);
                }
                else
                {
                    $temp = $this->_parse_pair($key, $val, $temp);
                }
            }

            $str .= $temp;
        }

        return str_replace($match['0'], $str, $string);
    }

    function _match_pair($string, $variable)
    {
        if (!preg_match('/{'.$variable.'}(.*){\/'.$variable.'}/s', $string, $match))
        {
            return FALSE;
        }

        return $match;
    }
}