<?php
 
 /**
  * Generic cached assset server... -- No security om this.. should only return compressed CSS/JS
  *
  * Does a few tricks with headers to improve caching...
  *
  *
  * Also includes code to generate assets...
  *
  * methods outputJavascriptDir / outputCssDir generate links to 
  *    BASEURL/Asset/css/xxxx.yyy.zzz
  *    BASEURL/Asset/js/xxxx.yyy.zzz
  *
  *   then
  *   we deliver the file from
  *       SESSION-DIR/{$www-user}-{$ff->project}-$ff->version}-{js|css}-compile/{filename}/PATH';
  *
  *   
  */
 
require_once 'Pman.php';

class Pman_Core_Asset extends Pman {
     
    var $types = array(
        'css' => 'text/css',
        'js' => 'text/javascript',
    );
    
    function getAuth()
    {
        return true;
    }
    
    
    function get($s='')
    {
       
        $bits = explode('/', $s);
        
        if (empty($bits[0]) || empty($bits[1])  || !isset($this->types[$bits[0]])) {
            $this->jerr("invalid url");
        }
       
        $s = str_replace('/', '-', $bits[1]);
        
        $ui = posix_getpwuid(posix_geteuid());
        $ff = HTML_FlexyFramework::get();
        
        $compile = session_save_path() . '/' .
                $ui['name'] . '-' . $ff->project . '-' . $ff->version .  '-'. $bits[0] . 'compile';
     
        $fn = $compile . '/'. $s .'.'. $bits[0];
        
        
        
        
        if (!file_exists($fn)) {
            header('Content-Type: '. $this->types[$bits[0]]);
        
            echo "// compiled file not found = $fn";
            exit;
        }
        
        $last_modified_time = filemtime($fn);
        
        
        if (
            (
                isset($_SERVER['HTTP_IF_MODIFIED_SINCE']) &&
                strtotime($_SERVER['HTTP_IF_MODIFIED_SINCE']) == $last_modified_time
            )
            ||
            (
                 isset($_SERVER['HTTP_IF_NONE_MATCH']) &&
                trim($_SERVER['HTTP_IF_NONE_MATCH']) == md5($fn)
            )) { 
            header("HTTP/1.1 304 Not Modified");
            exit;
        }
        
        header('Content-Type: '. $this->types[$bits[0]]);
        
        
        header("Pragma: public");
        header('Content-Length: '. filesize($fn));
        header('Cache-Control: max-age=2592000, public');
        header('Expires: '.gmdate('D, d M Y H:i:s \G\M\T', time() + 2592000));
        header('Last-Modified: '.gmdate('D, d M Y H:i:s \G\M\T', $last_modified_time));
        header('Etag: '. md5($fn)); 
        
        $fh = fopen($fn,'r');
        fpassthru($fh);
        fclose($fh);
        exit;
        
    }
    function post($s='') {
        die('invalid');
    }
     
    
}

// a little experimental... we are going to use the same name as the class. for these..

trait Pman_Core_Asset_Trait {
    
    
    
     /**
     * usage in template
     * {outputJavascriptDir(#Hydra#,#Hydra.js",#.......#)}
     *
     * call_user
     * 
     */
    
    function outputJavascriptDir($path)
    {
        
        $relpath = $this->rootURL . '/' . $path .'/';
        $ff = HTML_FlexyFramework::get();
        $dir =   $this->rootDir.'/' . $path;
        
        $args = func_get_args();
        $ar = array();
        if (count($args) < 2) {
            $ar = glob($dir . '/*.js');
        } else {
            array_shift($args);
            foreach($args as $f) {
                if (strpos($f,'*') > -1) {
 
                    $ar = array_merge($ar ,  glob($dir . '/'. $f));
                    continue;
                }
                
                $ar[] = $dir .'/'. $f;
            }
          
        }
         // cached version?? - how do we decide if it's expired?
        // while scanning the directory is slow... - it's faster than serving every file...
        
        
        //$path = $this->rootURL ."/Pman/$mod/";
        
        
        
        $files = array();
        $arfiles = array();
        $maxtime = 0;
        $mtime = 0;
        foreach($ar as $fn) {
            $f = basename($fn);
            // got the 'module file..'
            $mtime = filemtime($dir . '/'. $f);
            $maxtime = max($mtime, $maxtime);
            $arfiles[$fn] = $mtime;
            $files[] = $relpath  . $f . '?ts='.$mtime;
        }
        
        ksort($arfiles); // just sort by name so it's consistant for serialize..
        
        $ui = posix_getpwuid(posix_geteuid());
       
        
        $compiledir = session_save_path() . '/' .
                $ui['name'] . '-' . $ff->project . '-' . $ff->version . '-jscompile';
        
        if (!file_exists($compiledir)) {
            mkdir($compiledir,0700,true);
        }
        
         
        
        $lsort = create_function('$a,$b','return strlen($a) > strlen($b) ? 1 : -1;');
        usort($files, $lsort);
        
        
        if (!empty($this->bootLoader->isDev) && !empty($_REQUEST['isDev'])) {
            echo "<!-- Javascript compile turned off (isDev on) -->\n";
            $this->assetArrayToHtml($files,'js');
            return;
        }
        
        
        $smod = str_replace('/','.',$path);
        
        $output = date('Y-m-d-H-i-s-', $maxtime). $smod .'-'.md5(serialize($arfiles)) .'.js';
         
         
        
        // where are we going to write all of this..
        // This has to be done via a 
        if (!file_exists($compiledir.'/'.$output) || !filesize($compiledir.'/'.$output)) {
            require_once 'Pman/Core/JsCompile.php';
            $x = new Pman_Core_JsCompile();
            
            $x->pack($arfiles,$compiledir.'/'.$output, false);
            clearstatcache();
            if (!file_exists($compiledir.'/'.$output) ||
                !filesize($compiledir.'/'.$output)) {
                echo "<!-- compile did not generate files : ". basename($compiledir)  ."/{$output} -->\n";
                $this->assetArrayToHtml($files,'js');
                return;
            } 
            
        } else {
         //   echo "<!-- file already exists: {$basedir}/{$output} -->\n";
        }
        //$this->arrayToJsInclude(  $files);
        $this->assetArrayToHtml(  array(
            $this->baseURL.'/Asset/js/'. $output,
          
        ), 'js');
        
    }
    
    function assetArrayToHtml($ar, $type)
    {
        foreach($ar as $f) {
            switch( $type) {
                case 'js':
                    echo '<script type="text/javascript" src="'. $f. '"></script>'."\n";
                    break;
                case 'css':
                    echo '<link rel="stylesheet" href="'. $f. '"/>'."\n";
                    break;
       
            }
            
        }
    }
    
    
    /**
     * usage in template
     * {outputCssDir(#{Hydra/templates/images/css/#,#Hydra.js",#.......#)}
     */
    
    function outputCssDir($path)
    {
          
        $relpath = $this->rootURL . '/' . $path .'/';
        $ff = HTML_FlexyFramework::get();
        $dir =   $this->rootDir.'/' . $path;
        
        $args = func_get_args();
        $ar = array();
        if (count($args) < 2) {
            $ar = glob($dir . '/*.css');
        } else {
            array_shift($args);
            foreach($args as $f) {
                if (strpos($f,'*') > -1) {
 
                    $ar = array_merge($ar ,  glob($dir . '/'. $f));
                    continue;
                }
                // what if the fiel does not exist???
                $ar[] = $dir .'/'. $f;
            }
          
        }
        
        
         // cached version?? - how do we decide if it's expired?
        // while scanning the directory is slow... - it's faster than serving every file...
        
        
        //$path = $this->rootURL ."/Pman/$mod/";
        
        //print_R($ar);exit;
        $missing_files  = false;
        $files = array();
        $arfiles = array();
        $relfiles = array(); // array of files without the path part...
        $maxtime = 0;
        $mtime = 0;
        foreach($ar as $fn) {
            $relfiles[] = substr($fn, strlen($dir)+1);
            $f = basename($fn);
            // got the 'module file..'
            
            if (!file_exists($dir . '/'. $f)) {
                echo "<!-- missing {$relpath}{$f} -->\n";
                $files[] = $relpath  . $f . '?ts=0';
                $missing_files = true;
                continue;
            }
            
            $mtime = filemtime($dir . '/'. $f);
            $maxtime = max($mtime, $maxtime);
            $arfiles[$fn] = $mtime;
            $files[] = $relpath  . $f . '?ts='.$mtime;
            
            
            
        }
        if ($missing_files) {
            $this->assetArrayToHtml($files, 'css');
            return;
            
        }
        
         
        //print_r($relfiles);
        
        $ui = posix_getpwuid(posix_geteuid());
       
        
        $compiledir = session_save_path() . '/' .
                $ui['name'] . '-' . $ff->project . '-'. $ff->version . '-csscompile';
        
        if (!file_exists($compiledir)) {
            mkdir($compiledir,0700,true);
        }
        
         
        // no sorting???
        //$lsort = create_function('$a,$b','return strlen($a) > strlen($b) ? 1 : -1;');
        //usort($files, $lsort);
        
        
        if (!empty($this->bootLoader->isDev) && !empty($_REQUEST['isDev'])) {
            echo "<!-- CSS compile turned off (isDev on) -->\n";
            $this->assetArrayToHtml($files,'css');
            return;
        }
        
        
        $smod = str_replace('/','.',$path);
        
        $output = date('Y-m-d-H-i-s-', $maxtime). $smod .'-'.md5(serialize($arfiles)) .'.css';
         
         
        
        // where are we going to write all of this..
        // This has to be done via a 
        if (true || !file_exists($compiledir.'/'.$output) || !filesize($compiledir.'/'.$output)) {
            
            
            
            require_once 'HTML/CSS/Minify.php';
            $x = new HTML_CSS_Minify(substr($relpath,0,-1), $dir, $relfiles);
            
            file_put_contents($compiledir.'/'.$output , $x->minify( $this->baseURL.'/Asset/css'));
            clearstatcache();
            if (!file_exists($compiledir.'/'.$output) ||
                !filesize($compiledir.'/'.$routput)) {
                echo "<!-- compile did not generate files : " . basename($compiledir) . "/{$output} -->\n";
                $this->assetArrayToHtml($files,'css');
                return;
            } 
            
        } else {
         //   echo "<!-- file already exists: {$basedir}/{$output} -->\n";
        }
        //$this->arrayToJsInclude(  $files);
        $this->assetArrayToHtml(  array(
            $this->baseURL.'/Asset/css/'. $output,
          
        ),'css');
        
    }
    
    
    
}