<?php

function __autoload($class) {

  $class_loc = 'class/'.$class.'.class.php';

  if (is_readable($class_loc)) {

          require_once($class_loc);

  }

}

function errorToException($code, $msg, $file, $line) {

  throw new Exception($msg);

}

set_error_handler('errorToException');

abstract class utils {

  static public function list_available_panos($base_dir) {

          /** Lists all that can be turned into a panorama

           */

          $dir = opendir($base_dir);

          $ret = array();

          $finfo = finfo_open(FILEINFO_MIME_TYPE); // Retourne le type mime du fichier

          while(false !== ($filename = readdir($dir))) {

                  if (!preg_match('/^\.\.?$/', $filename)) {

                          $ftype = finfo_file($finfo, $base_dir.'/'.$filename);

                          if (isset($ftype)) {

                                  $pano = array(

                                    'comment' =>  $filename,

                                    'title' => sprintf('fichier de type %s', $ftype)

                                  );

                          } else {

                                  $pano = array(

                                    'comment' =>  sprintf('<samp>%s</samp>', $filename),

                                    'title' => ''

                                  );

                          }

                          $pano['filename'] = $filename;

                          $ret[] = $pano;

                  }

          }

          return $ret;

  }

  public static function strip_extension($filename) {

          /** Removes the extension from a file name

           * @return the stripped name

           */

          return preg_replace('/\.[^.]+$/', '', $filename);

  }

  public static function php2ini($v) {

          /** convert php var to a string representing it in an ini file.

           * @return a string, ready to be inserted into a ini file.

           */

    if (is_numeric($v)) {

      return $v;

    }

    $type = gettype($v);

    switch($type) {

      case 'boolean': return $v ? "true" : "false";

      default: return '"'.$v.'"';

    }

    return $v;

  }

  public static function get_unique_filepath($path) {

    /** To handle uploads with same name : for a given path, suffix it with _<n>

    (keeping trailing extension)

    * till it find a non-preexistant_path and returns it.

    */

    if (file_exists($path)) {

      $info = pathinfo($path);

      $extension = $info['extension'];

      $remain = self::strip_extension($path);

      $n = 0;

      do {

        $n++;

        $fn = sprintf('%s_%d.%s', $remain, $n, $extension);

      } while (file_exists($fn));

      return $fn;

    } else {

      return $path;

    }

  }

  public static function relative_redirect($extra) {

    $host  = $_SERVER['HTTP_HOST'];

    $uri   = rtrim(dirname($_SERVER['PHP_SELF']), '/\\');

    header("Location: http://$host$uri/$extra");

  }

}

?>