<?php
/**
 * Class Minify_Controller_Version1 
 * @package Minify
 */

/**
 * Controller class for emulating version 1 of minify.php (mostly a proof-of-concept)
 * 
 * <code>
 * Minify::serve('Version1');
 * </code>
 * 
 * @package Minify
 * @author Stephen Clay <steve@mrclay.org>
 */
class Minify_Controller_Version1 extends Minify_Controller_Base {
 
 /**
 * Set up groups of files as sources
 * 
 * @param array $options controller and Minify options
 * @return array Minify options
 * 
 */
 public function setupSources($options) {
 // PHP insecure by default: realpath() and other FS functions can't handle null bytes.
 if (isset($_GET['files'])) {
 $_GET['files'] = str_replace("\x00", '', (string)$_GET['files']);
 }

 self::_setupDefines();
 if (MINIFY_USE_CACHE) {
 $cacheDir = defined('MINIFY_CACHE_DIR')
 ? MINIFY_CACHE_DIR
 : '';
 Minify::setCache($cacheDir);
 }
 $options['badRequestHeader'] = 'HTTP/1.0 404 Not Found';
 $options['contentTypeCharset'] = MINIFY_ENCODING;

 // The following restrictions are to limit the URLs that minify will
 // respond to. Ideally there should be only one way to reference a file.
 if (! isset($_GET['files'])
 // verify at least one file, files are single comma separated, 
 // and are all same extension
 || ! preg_match('/^[^,]+\\.(css|js)(,[^,]+\\.\1円)*$/', $_GET['files'], $m)
 // no "//" (makes URL rewriting easier)
 || strpos($_GET['files'], '//') !== false
 // no "\"
 || strpos($_GET['files'], '\\') !== false
 // no "./"
 || preg_match('/(?:^|[^\\.])\\.\\//', $_GET['files'])
 ) {
 return $options;
 }

 $files = explode(',', $_GET['files']);
 if (count($files) > MINIFY_MAX_FILES) {
 return $options;
 }
 
 // strings for prepending to relative/absolute paths
 $prependRelPaths = dirname($_SERVER['SCRIPT_FILENAME'])
 . DIRECTORY_SEPARATOR;
 $prependAbsPaths = $_SERVER['DOCUMENT_ROOT'];
 
 $goodFiles = array();
 $hasBadSource = false;
 
 $allowDirs = isset($options['allowDirs'])
 ? $options['allowDirs']
 : MINIFY_BASE_DIR;
 
 foreach ($files as $file) {
 // prepend appropriate string for abs/rel paths
 $file = ($file[0] === '/' ? $prependAbsPaths : $prependRelPaths) . $file;
 // make sure a real file!
 $file = realpath($file);
 // don't allow unsafe or duplicate files
 if (parent::_fileIsSafe($file, $allowDirs) 
 && !in_array($file, $goodFiles)) 
 {
 $goodFiles[] = $file;
 $srcOptions = array(
 'filepath' => $file
 );
 $this->sources[] = new Minify_Source($srcOptions);
 } else {
 $hasBadSource = true;
 break;
 }
 }
 if ($hasBadSource) {
 $this->sources = array();
 }
 if (! MINIFY_REWRITE_CSS_URLS) {
 $options['rewriteCssUris'] = false;
 }
 return $options;
 }
 
 private static function _setupDefines()
 {
 $defaults = array(
 'MINIFY_BASE_DIR' => realpath($_SERVER['DOCUMENT_ROOT'])
 ,'MINIFY_ENCODING' => 'utf-8'
 ,'MINIFY_MAX_FILES' => 16
 ,'MINIFY_REWRITE_CSS_URLS' => true
 ,'MINIFY_USE_CACHE' => true
 );
 foreach ($defaults as $const => $val) {
 if (! defined($const)) {
 define($const, $val);
 }
 }
 }
}