lib/joe/site.lib.php

   1 <?php
   2 /* Generic Site Classes
   3  * 2007/04/09 Joe Presbrey <presbrey@mit.edu>
   4  */
   5
   6 class Site {
   7         var $URI, $ARGV;
   8         function __construct($uri) {
   9                 $this->URI = $uri;
  10                 $this->ARGV = array_merge(
  11                         array_prepend_keys($_COOKIE,'c_'),
  12                         array_prepend_keys($_FILES,'f_'),
  13                         array_prepend_keys($_GET,'g_'),
  14                         array_prepend_keys($_POST,'p_'));
  15         }
  16         function Start() {
  17                 if (isset($_SESSION)) {
  18                         $this->ARGV = array_merge(
  19                                 $this->ARGV,
  20                                 array_prepend_keys($_SESSION,'s_'));
  21                 }
  22         }
  23         function Run($MODULE, $METHOD) {
  24                 $nCalls = 0;
  25                 if (file_exists(strtolower('site/'.$MODULE.'.php'))) {
  26                         require_once strtolower('site/'.$MODULE.'.php');
  27                         if (class_exists($MODULE)) {
  28                                 $page = new $MODULE($this, $METHOD);
  29                                 $page->Start();
  30                                 $handlers = array_intersect(
  31                                         $page->get_handlers($METHOD),
  32                                         array_keys($this->ARGV));
  33                                 foreach($handlers as $handler) {
  34                                         if (false !== $page->Run($handler)) {
  35                                                 $nCalls++;
  36                                         }
  37                                 }
  38                                 if ($nCalls == 0 && is_callable(array($page, '_default'))) {
  39                                         $page->Run('_default');
  40                                         $nCalls++;
  41                                 }
  42                                 $page->Finish();
  43                         }
  44                 }
  45                 return $nCalls;
  46         }
  47         function Finish() {}
  48 }
  49
  50 class Page {
  51         var $SITE, $METHOD, $URI;
  52         function __construct($site, $method) {
  53                 $this->SITE = $site;
  54                 $this->METHOD = $method;
  55                 foreach($site->ARGV as $k=>$v)
  56                         $this->$k = $v;
  57                 $this->URI = $site->URI;
  58         }
  59         function get_handlers() {
  60                 $handlers = isset($this->handlers[$this->METHOD]) ?
  61                                         $this->handlers[$this->METHOD] : array();
  62                 return $handlers;
  63         }
  64         function has_handler($handler) {
  65                 return isset($this->handlers[$this->METHOD]) ?
  66                                 in_array($handler, $this->handlers[$this->METHOD]) : false;
  67         }
  68
  69         function Start() {}
  70         function Run($handler) {
  71                 if (is_callable(array($this, $handler))) {
  72                         return array(0, call_user_func(array($this, $handler)));
  73                 } else {
  74                         return false;
  75                 }
  76         }
  77         function Finish() {}
  78 }