classes/platal.php

   1 <?php
   2 /***************************************************************************
   3  *  Copyright (C) 2003-2006 Polytechnique.org                              *
   4  *  http://opensource.polytechnique.org/                                   *
   5  *                                                                         *
   6  *  This program is free software; you can redistribute it and/or modify   *
   7  *  it under the terms of the GNU General Public License as published by   *
   8  *  the Free Software Foundation; either version 2 of the License, or      *
   9  *  (at your option) any later version.                                    *
  10  *                                                                         *
  11  *  This program is distributed in the hope that it will be useful,        *
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of         *
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the          *
  14  *  GNU General Public License for more details.                           *
  15  *                                                                         *
  16  *  You should have received a copy of the GNU General Public License      *
  17  *  along with this program; if not, write to the Free Software            *
  18  *  Foundation, Inc.,                                                      *
  19  *  59 Temple Place, Suite 330, Boston, MA  02111-1307  USA                *
  20  ***************************************************************************/
  21
  22 define('PL_FORBIDDEN', 403);
  23 define('PL_NOT_FOUND', 404);
  24
  25 class Platal
  26 {
  27     var $__mods;
  28     var $__hooks;
  29
  30     var $ns;
  31     var $path;
  32     var $argv;
  33
  34     function Platal()
  35     {
  36         $modules    = func_get_args();
  37         $this->path = trim(Get::_get('n', null), '/');
  38
  39         $this->__mods  = array();
  40         $this->__hooks = array();
  41
  42         array_unshift($modules, 'core');
  43         foreach ($modules as $module) {
  44             $this->__mods[$module] = $m = PLModule::factory($module);
  45             $this->__hooks += $m->handlers();
  46         }
  47     }
  48
  49     function pl_self($n = null)
  50     {
  51         if (is_null($n))
  52             return $this->path;
  53
  54         if ($n >= 0)
  55             return join('/', array_slice($this->argv, 0, $n + 1));
  56
  57         if ($n <= -count($this->argv))
  58             return $this->argv[0];
  59
  60         return join('/', array_slice($this->argv, 0, $n));
  61     }
  62
  63     function find_hook()
  64     {
  65         $p = $this->path;
  66
  67         while ($p) {
  68             if (array_key_exists($p, $this->__hooks))
  69                 break;
  70
  71             $p = substr($p, 0, strrpos($p, '/'));
  72         }
  73
  74         if (empty($this->__hooks[$p])) {
  75             return null;
  76         }
  77
  78         $hook = $this->__hooks[$p];
  79
  80         if (!is_callable($hook['hook'])) {
  81             return null;
  82         }
  83
  84         $this->argv    = explode('/', substr($this->path, strlen($p)));
  85         $this->argv[0] = $p;
  86
  87         return $hook;
  88     }
  89
  90     function find_nearest_key($key, &$array)
  91     {
  92         $keys = array_keys($array);
  93         if (in_array($key, $keys)) {
  94             return $key;
  95         }
  96         foreach ($keys as $k) {
  97             if (strpos($key, $k) !== false || strpos($k, $key) !== false) {
  98                 return $k;
  99             }
 100         }
 101         if (in_array("#final#", $keys)) {
 102             return "#final#";
 103         }
 104         return null;
 105     }
 106
 107     function near_hook()
 108     {
 109         $hooks = array();
 110         foreach ($this->__hooks as $hook=>$handler) {
 111             $parts = split('/', $hook);
 112             $place =& $hooks;
 113             foreach ($parts as $part) {
 114                 if (!isset($place[$part])) {
 115                     $place[$part] = array();
 116                 }
 117                 $place =& $place[$part];
 118             }
 119             $place["#final#"] = array();
 120         }
 121
 122         $p = split('/', $this->path);
 123         $place =& $hooks;
 124         $link  = '';
 125         $ended = false;
 126         foreach ($p as $k) {
 127             if (!$ended) {
 128                 $key = $this->find_nearest_key($k, $place);
 129             } else {
 130                 $key = $k;
 131             }
 132             if ($key == "#final#") {
 133                 $key = $k;
 134                 $ended = true;
 135                 if (!array_key_exists($link, $this->__hooks)) {
 136                     return null;
 137                 }
 138             }
 139             if (!is_null($key)) {
 140                 if (!empty($link)) {
 141                     $link .= '/';
 142                 }
 143                 $link .= $key;
 144                 $place =& $place[$key];
 145             } else {
 146                 return null;
 147             }
 148         }
 149         return $link;
 150     }
 151
 152     function call_hook(&$page)
 153     {
 154         $hook = $this->find_hook();
 155         if (empty($hook)) {
 156             return PL_NOT_FOUND;
 157         }
 158
 159         $args    = $this->argv;
 160         $args[0] = &$page;
 161
 162         if (strlen($hook['perms']) && $hook['perms'] != Session::v('perms')) {
 163             return PL_FORBIDDEN;
 164         }
 165
 166         if ($hook['auth'] > S::v('auth', AUTH_PUBLIC)) {
 167             if ($hook['type'] == DO_AUTH) {
 168                 global $globals;
 169
 170                 if (!call_user_func(array($globals->session, 'doAuth'))) {
 171                     $this->force_login($page);
 172                 }
 173             } else {
 174                 return PL_FORBIDDEN;
 175             }
 176         }
 177
 178         return call_user_func_array($hook['hook'], $args);
 179     }
 180
 181     function force_login(&$page)
 182     {
 183         if (S::logged()) {
 184             $page->changeTpl('password_prompt_logged.tpl');
 185             $page->addJsLink('do_challenge_response_logged.js');
 186         } else {
 187             $page->changeTpl('password_prompt.tpl');
 188             $page->addJsLink('do_challenge_response.js');
 189         }
 190         $page->run();
 191     }
 192
 193     function run()
 194     {
 195         global $page;
 196
 197         new_skinned_page('index.tpl');
 198
 199         if (empty($this->path)) {
 200             $this->path = 'index';
 201         }
 202
 203         $page->assign('platal', $this);
 204         switch ($this->call_hook($page)) {
 205           case PL_FORBIDDEN:
 206             $this->__mods['core']->handler_403($page);
 207             break;
 208
 209           case PL_NOT_FOUND:
 210             $this->__mods['core']->handler_404($page);
 211             break;
 212         }
 213
 214         $page->assign('platal', $this);
 215         $page->run();
 216     }
 217
 218     function on_subscribe($forlife, $uid, $promo, $pass)
 219     {
 220         $args = func_get_args();
 221         foreach ($this->__mods as $mod) {
 222             if (!is_callable($mod, 'on_subscribe'))
 223                 continue;
 224             call_user_func_array(array($mod, 'on_subscribe'), $args);
 225         }
 226     }
 227 }
 228
 229 ?>