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   1  <?php
   2  
   3  /*
   4   * This file is part of Mustache.php.
   5   *
   6   * (c) 2010-2015 Justin Hileman
   7   *
   8   * For the full copyright and license information, please view the LICENSE
   9   * file that was distributed with this source code.
  10   */
  11  
  12  /**
  13   * Mustache class autoloader.
  14   */
  15  class Mustache_Autoloader
  16  {
  17      private $baseDir;
  18  
  19      /**
  20       * Autoloader constructor.
  21       *
  22       * @param string $baseDir Mustache library base directory (default: dirname(__FILE__).'/..')
  23       */
  24      public function __construct($baseDir = null)
  25      {
  26          if ($baseDir === null) {
  27              $baseDir = dirname(__FILE__) . '/..';
  28          }
  29  
  30          // realpath doesn't always work, for example, with stream URIs
  31          $realDir = realpath($baseDir);
  32          if (is_dir($realDir)) {
  33              $this->baseDir = $realDir;
  34          } else {
  35              $this->baseDir = $baseDir;
  36          }
  37      }
  38  
  39      /**
  40       * Register a new instance as an SPL autoloader.
  41       *
  42       * @param string $baseDir Mustache library base directory (default: dirname(__FILE__).'/..')
  43       *
  44       * @return Mustache_Autoloader Registered Autoloader instance
  45       */
  46      public static function register($baseDir = null)
  47      {
  48          $loader = new self($baseDir);
  49          spl_autoload_register(array($loader, 'autoload'));
  50  
  51          return $loader;
  52      }
  53  
  54      /**
  55       * Autoload Mustache classes.
  56       *
  57       * @param string $class
  58       */
  59      public function autoload($class)
  60      {
  61          if ($class[0] === '\\') {
  62              $class = substr($class, 1);
  63          }
  64  
  65          if (strpos($class, 'Mustache') !== 0) {
  66              return;
  67          }
  68  
  69          $file = sprintf('%s/%s.php', $this->baseDir, str_replace('_', '/', $class));
  70          if (is_file($file)) {
  71              require $file;
  72          }
  73      }
  74  }