<?php if (!defined('BASEPATH')) exit('No direct script access allowed');

/*
 * CodeIgniter helper class for use with Minify.  You should rename
 * this file to MY_Includes.php
 *
 * requires that something like:
 *    $autoload['config'] = array('minify_config');
 * is set in config/autoload.php file
 *
 * Use as is without warranty, share or modify as you see fit
 * author: Vincent DiBartolo (www.nodroidsallowed.com, vadibart [at] gmail.com) 
 */
class MY_Includes {

  private $CI;
  private $controller   = "";
  private $jsFilesNeed  = array();
  private $cssFilesNeed = array();


  public function __construct($params){

    $this->CI =& get_instance();

    list($this->controller) = $this->methodParams($params, array(""));
    $this->init();
    $this->compileTags();

  }//constructor


  private function methodParams($params, $defaults){

    $returnArray = array();

    if( !isset($params) ){
      $params = array();
    } else if ( !is_array($params) ){
      //not sure why this happens but the $params var sometimes is a scalar value
      //and it looks like CI is doing this on its own
      $params = array($params);
    }//if-else if

    if( !isset($defaults) ){
      $defaults = array();
    }//if

    foreach( $params as $thisParam ){
      $returnArray[] = $thisParam;
    }//foreach

    if( count($returnArray) < count($defaults) ){

      $start = count($returnArray);
      $end   = count($defaults);
      for( $i=$start; $i<$end; $i++ ){
        $returnArray[] = $defaults[$i];
      }//for

    }//if

    return $returnArray;

  }//method methodParams


  private function init(){

    //from minify examples:
    //Add the location of Minify's "lib" directory to the include_path
    ini_set('include_path', '/path/to/minify/lib/dir' . PATH_SEPARATOR . ini_get('include_path') );
    require_once 'Minify/Build.php';
    require_once 'Minify.php';

  }//method init


  private function compileTags(){

    $config = $this->CI->config->item('minify');

    //these are on all pages
    $this->addFiles($config['global']);

    if( !isset($config[$this->controller]) ){
      return;
    }//if

    //controller-specific pages
    $this->addFiles($config[$this->controller]);

  }//method compileTags


  private function addFiles($arr){

    foreach( $arr as $key=>$filename){

      if( preg_match('/.*js/', $filename) ){
	$this->addJSFile($filename);
      } else if( preg_match('/.*css/', $filename) ){
	$this->addCSSFile($filename);
      }//if-else if

    }//foreach

  }//method addFiles


  private function addJSFile($fileName){
    //example of '/path/to/js/files': "/home/public_html/mysite.com/script/"
    $this->jsFilesNeed['/path/to/js/files'.$fileName] = 'no-dups';
  }//method addJSFile


  private function addCSSFile($fileName){
    //example of '/path/to/css/files': "/home/public_html/mysite.com/style/"
    $this->cssFilesNeed['/path/to/css/files'.$fileName] = 'no-dups';
  }//method addCSSFile


  private function getJSFiles(){

    $jsFiles = array();
    foreach( $this->jsFilesNeed as $name=>$blah ){
      $jsFiles[] = $name;
    }//foreach

    return $jsFiles;

  }//method getJSFiles


  public function jsTag($str = ""){

    //make sure convert this to CI-type URL (no "?")
    $jsBuild  = new Minify_Build( $this->getJSFiles() );
    $fileName = str_replace('/', '-', $this->controller);
    $url      = site_url('includetag/js/' . $this->convertController() );
    return str_replace('?', '/', $jsBuild->uri($url));

  }//method jsTag


  private function getCSSFiles(){

    $cssFiles = array();
    foreach( $this->cssFilesNeed as $name=>$blah ){
      $cssFiles[] = $name;
    }//foreach

    return $cssFiles;

  }//method getCSSFiles


  public function cssTag($str = ""){

    //make sure convert this to CI-type URL (no "?")
    $cssBuild = new Minify_Build( $this->getCSSFiles() );
    $url      = site_url('includetag/css/' . $this->convertController() );
    return str_replace('?', '/', $cssBuild->uri($url));

  }//method cssTag


  private function convertController(){
    return str_replace('/', '-', $this->controller);
  }//method convertController


  public function serveJS($fileName){

    $groupSources = array($fileName => $this->getJSFiles() );
    Minify::setCache('/path/to/minify/cache/dir');
    Minify::serve('Groups', array('groups' => $groupSources
    				 ,'maxAge' => 31536000 //1 year
				 ));
    
  }//method serve


  public function serveCSS($fileName){

    $groupSources = array($fileName => $this->getCSSFiles() );
    Minify::setCache('/path/to/minify/cache/dir');
    Minify::serve('Groups', array('groups' => $groupSources
    				 ,'maxAge' => 31536000 //1 year
    				 ));

  }//method serveCSS


}//class MY_Includes

?>