XHTMLCompiler.php

   1 <?php
   2
   3 /**
   4  * Super singleton registry that manages application context.
   5  */
   6 class XHTMLCompiler
   7 {
   8
   9     // SINGLETON FUNCTIONALITY
  10
  11     /** Private instance of singleton */
  12     private static $_instance;
  13
  14     /** Private constructor, prevents other people from making it */
  15     private function __construct() {
  16         $this->loadConf();
  17     }
  18
  19     /** Retrieves the single instance of the object */
  20     static public function getInstance() {
  21         if(is_null(self::$_instance)) {
  22             self::$_instance = new self();
  23         }
  24         return self::$_instance;
  25     }
  26
  27     /**
  28      * Overloads the instance with another one, usually a mock object
  29      * @param Object substitute for XHTMLCompiler
  30      */
  31     static public function setInstance($stub) {
  32         self::$_instance = $stub;
  33     }
  34
  35     // REGISTRY FUNCTIONALITY
  36
  37     /** Private instance of PHP wrapper */
  38     private static $_PHPWrapperInstance;
  39
  40     /** Retrieves the single instance of the PHP wrapper */
  41     static public function getPHPWrapper() {
  42         if(is_null(self::$_PHPWrapperInstance)) {
  43             self::$_PHPWrapperInstance = new XHTMLCompiler_PHP();
  44         }
  45         return self::$_PHPWrapperInstance;
  46     }
  47
  48     /**
  49      * Overloads the instance with another one, usually a mock object
  50      * @param Object substitute for XHTMLCompiler
  51      */
  52     static public function setPHPWrapper($stub) {
  53         self::$_PHPWrapperInstance = $stub;
  54     }
  55
  56     // PLUGIN/CONFIGURATION FUNCTIONALITY
  57
  58     protected $configKeys = array('allowed_dirs', 'directory_index',
  59         'indexed_dirs');
  60     protected $config = array();
  61
  62     public function loadConf() {
  63         require 'config.default.php'; // defaults
  64         require 'config.php'; // user
  65         $this->config = compact($this->configKeys);
  66     }
  67     public function getConf($key) {
  68         if (!isset($this->config[$key])) throw new Exception('No such configuration keypair');
  69         return $this->config[$key];
  70     }
  71
  72 }
  73
  74 ?>