| 1 | <?php |
| 2 | /*************************************************************************** |
| 3 | * Copyright (C) 2003-2011 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 | // Return values for handlers and hooks. This defines the behavior of both the |
| 23 | // plat/al engine, and the invidivual hooks. |
| 24 | define('PL_DO_AUTH', 300); // User should be redirected to the login page. |
| 25 | define('PL_BAD_REQUEST', 400); // Request is not valid, and could not be interpreted. |
| 26 | define('PL_FORBIDDEN', 403); // User is not allowed to view page (auth or permission error). |
| 27 | define('PL_NOT_FOUND', 404); // Page doesn't not exist. Engine will try to offer suggestions. |
| 28 | define('PL_WIKI', 500); // Page is a wiki page, plat/al engine should yield to the wiki engine. |
| 29 | define('PL_JSON', 501); // Page is valid, but result should be JSON-encoded, not HTML-encoded. |
| 30 | |
| 31 | abstract class PlHook |
| 32 | { |
| 33 | protected $auth; |
| 34 | protected $perms; |
| 35 | protected $type; |
| 36 | |
| 37 | protected function __construct($auth = AUTH_PUBLIC, $perms = 'user', $type = DO_AUTH) |
| 38 | { |
| 39 | $this->auth = $auth; |
| 40 | $this->perms = $perms; |
| 41 | $this->type = $type; |
| 42 | } |
| 43 | |
| 44 | public function checkPerms() |
| 45 | { |
| 46 | // Don't check permissions if there are no permission requirement |
| 47 | // (either no requested group membership, or public auth is allowed). |
| 48 | return !$this->perms || $this->auth == AUTH_PUBLIC || |
| 49 | Platal::session()->checkPerms($this->perms); |
| 50 | } |
| 51 | |
| 52 | public function hasType($type) |
| 53 | { |
| 54 | return ($this->type & $type) == $type; |
| 55 | } |
| 56 | |
| 57 | abstract protected function run(PlPage $page, array $args); |
| 58 | |
| 59 | public function call(PlPage $page, array $args) |
| 60 | { |
| 61 | global $globals, $session, $platal; |
| 62 | if (!$session->checkAuth($this->auth)) { |
| 63 | if ($this->hasType(DO_AUTH)) { |
| 64 | if (!$session->start($this->auth)) { |
| 65 | $platal->force_login($page); |
| 66 | return PL_FORBIDDEN; |
| 67 | } |
| 68 | } else { |
| 69 | return PL_FORBIDDEN; |
| 70 | } |
| 71 | } |
| 72 | if (!$this->checkPerms()) { |
| 73 | if (Platal::notAllowed()) { |
| 74 | return PL_FORBIDDEN; |
| 75 | } |
| 76 | } |
| 77 | return $this->run($page, $args); |
| 78 | } |
| 79 | } |
| 80 | |
| 81 | /** The standard plat/al hook, for interactive requests. |
| 82 | * It optionally does active authentication (DO_AUTH). The handler is invoked |
| 83 | * with the PlPage object, and with each of the remaining path components. |
| 84 | */ |
| 85 | class PlStdHook extends PlHook |
| 86 | { |
| 87 | private $callback; |
| 88 | |
| 89 | public function __construct($callback, $auth = AUTH_PUBLIC, $perms = 'user', $type = DO_AUTH) |
| 90 | { |
| 91 | parent::__construct($auth, $perms, $type); |
| 92 | $this->callback = $callback; |
| 93 | } |
| 94 | |
| 95 | protected function run(PlPage $page, array $args) |
| 96 | { |
| 97 | global $session, $platal; |
| 98 | |
| 99 | $args[0] = $page; |
| 100 | $val = call_user_func_array($this->callback, $args); |
| 101 | if ($val == PL_DO_AUTH) { |
| 102 | if (!$session->start($session->loggedLevel())) { |
| 103 | $platal->force_login($page); |
| 104 | } |
| 105 | $val = call_user_func_array($this->callback, $args); |
| 106 | } |
| 107 | return $val; |
| 108 | } |
| 109 | } |
| 110 | |
| 111 | /** A specialized hook for API requests. |
| 112 | * It is intended to be used for passive API requests, authenticated either by |
| 113 | * an existing session (with a valid XSRF token), or by an alternative single |
| 114 | * request auth mechanism implemented by PlSession::apiAuth. |
| 115 | * |
| 116 | * This hook is suitable for read-write requests against the website, provided |
| 117 | * $auth is set appropriately. Note that the auth level is only checked for |
| 118 | * session-authenticated users, as "apiAuth" users are assumed to always have |
| 119 | * the requested level (use another hook otherwise). |
| 120 | * |
| 121 | * The callback will be passed as arguments the PlPage, the authenticated |
| 122 | * PlUser, the JSON decoded payload, and the remaining path components, as with |
| 123 | * any other hook. |
| 124 | * |
| 125 | * If the callback intends to JSON-encode its returned value, it is advised to |
| 126 | * use PlPage::jsonAssign, and return PL_JSON to enable automatic encoding. |
| 127 | */ |
| 128 | class PlApiHook extends PlHook |
| 129 | { |
| 130 | private $actualAuth; |
| 131 | private $callback; |
| 132 | |
| 133 | public function __construct($callback, $auth = AUTH_PUBLIC, $perms = 'user', $type = NO_AUTH) |
| 134 | { |
| 135 | // As mentioned above, $auth is only applied for session-based auth |
| 136 | // (as opposed to token-based). PlHook is initialized to AUTH_PUBLIC to |
| 137 | // avoid it refusing to approve requests; this is important as the user |
| 138 | // is not yet authenticated at that point (see below for the actual |
| 139 | // permissions check). |
| 140 | parent::__construct(AUTH_PUBLIC, $perms, $type); |
| 141 | $this->actualAuth = $auth; |
| 142 | $this->callback = $callback; |
| 143 | } |
| 144 | |
| 145 | private function getEncodedPayload($method) |
| 146 | { |
| 147 | return $method == "GET" ? "" : file_get_contents("php://input"); |
| 148 | } |
| 149 | |
| 150 | private function decodePayload($encodedPayload) |
| 151 | { |
| 152 | return empty($encodedPayload) ? array() : json_decode($encodedPayload, true); |
| 153 | } |
| 154 | |
| 155 | protected function run(PlPage $page, array $args) |
| 156 | { |
| 157 | $method = $_SERVER['REQUEST_METHOD']; |
| 158 | $encodedPayload = $this->getEncodedPayload($method); |
| 159 | $jsonPayload = $this->decodePayload($encodedPayload); |
| 160 | $resource = '/' . implode('/', $args); |
| 161 | |
| 162 | // If the payload wasn't a valid JSON encoded object, bail out early. |
| 163 | if (is_null($jsonPayload)) { |
| 164 | $page->trigError("Could not decode the JSON-encoded payload sent with the request."); |
| 165 | return PL_BAD_REQUEST; |
| 166 | } |
| 167 | |
| 168 | // Authenticate the request. Try first with the existing session (which |
| 169 | // is less expensive to check), by veryfing that the XSRF token is |
| 170 | // valid; otherwise fallbacks to API-type authentication from PlSession. |
| 171 | if (S::logged() && S::has_xsrf_token() && Platal::session()->checkAuth($this->actualAuth)) { |
| 172 | $user = S::user(); |
| 173 | } else { |
| 174 | $user = Platal::session()->apiAuth($method, $resource, $encodedPayload); |
| 175 | } |
| 176 | |
| 177 | // Check the permissions, unless the handler is fully public. |
| 178 | if ($this->actualAuth > AUTH_PUBLIC) { |
| 179 | if (is_null($user) || !$user->checkPerms($this->perms)) { |
| 180 | return PL_FORBIDDEN; |
| 181 | } |
| 182 | } |
| 183 | |
| 184 | // Invoke the callback, whose signature is (PlPage, PlUser, jsonPayload). |
| 185 | array_shift($args); |
| 186 | array_unshift($args, $page, $user, $jsonPayload); |
| 187 | return call_user_func_array($this->callback, $args); |
| 188 | } |
| 189 | } |
| 190 | |
| 191 | /** A specialized hook for token-based requests. |
| 192 | * It is intended for purely passive requests (typically for serving CSV or RSS |
| 193 | * content outside the browser), and can fallback to regular session-based |
| 194 | * authentication when the token is not valid/available. |
| 195 | * |
| 196 | * Note that $auth is only applied for session-backed authentication; it is |
| 197 | * assumed that token-based auth is always enough for the hook (otherwise, just |
| 198 | * use PlStdHook above). |
| 199 | * |
| 200 | * Also, this hook requires that the first two unmatched path components are the |
| 201 | * user and token (for instance /<matched path>/<user>/<token>/....). They will |
| 202 | * be popped before being passed to the handler, and replaced by the request's |
| 203 | * PlUser object. |
| 204 | */ |
| 205 | class PlTokenHook extends PlHook |
| 206 | { |
| 207 | private $actualAuth; |
| 208 | private $callback; |
| 209 | |
| 210 | public function __construct($callback, $auth = AUTH_PUBLIC, $perms = 'user', $type = NO_AUTH) |
| 211 | { |
| 212 | // See PlApiHook::__construct. |
| 213 | parent::__construct(AUTH_PUBLIC, $perms, $type); |
| 214 | $this->actualAuth = $auth; |
| 215 | $this->callback = $callback; |
| 216 | } |
| 217 | |
| 218 | protected function run(PlPage $page, array $args) |
| 219 | { |
| 220 | // Retrieve the user, either from the session (less expensive, as it is |
| 221 | // already there), or from the in-path (user, token) pair. |
| 222 | if (S::logged() && Platal::session()->checkAuth($this->actualAuth)) { |
| 223 | $user = S::user(); |
| 224 | } else { |
| 225 | $user = Platal::session()->tokenAuth(@$args[1], @$args[2]); |
| 226 | } |
| 227 | |
| 228 | // Check the permissions, unless the handler is fully public. |
| 229 | if ($this->actualAuth > AUTH_PUBLIC) { |
| 230 | if (is_null($user) || !$user->checkPerms($this->perms)) { |
| 231 | return PL_FORBIDDEN; |
| 232 | } |
| 233 | } |
| 234 | |
| 235 | // Replace the first three remaining elements of the path with the |
| 236 | // PlPage and PlUser objects. |
| 237 | array_shift($args); |
| 238 | $args[0] = $page; |
| 239 | $args[1] = $user; |
| 240 | return call_user_func_array($this->callback, $args); |
| 241 | } |
| 242 | } |
| 243 | |
| 244 | /** A specialized plat/al hook for serving wiki pages. |
| 245 | */ |
| 246 | class PlWikiHook extends PlHook |
| 247 | { |
| 248 | public function __construct($auth = AUTH_PUBLIC, $perms = 'user', $type = DO_AUTH) |
| 249 | { |
| 250 | parent::__construct($auth, $perms, $type); |
| 251 | } |
| 252 | |
| 253 | protected function run(PlPage $page, array $args) |
| 254 | { |
| 255 | return PL_WIKI; |
| 256 | } |
| 257 | } |
| 258 | |
| 259 | class PlHookTree |
| 260 | { |
| 261 | public $hook = null; |
| 262 | public $aliased = null; |
| 263 | public $children = array(); |
| 264 | |
| 265 | public function addChildren(array $hooks) |
| 266 | { |
| 267 | global $platal; |
| 268 | foreach ($hooks as $path=>$hook) { |
| 269 | $path = explode('/', $path); |
| 270 | $element = $this; |
| 271 | foreach ($path as $next) { |
| 272 | $alias = null; |
| 273 | if ($next{0} == '%') { |
| 274 | $alias = $next; |
| 275 | $next = $platal->hook_map(substr($next, 1)); |
| 276 | } |
| 277 | if (!isset($element->children[$next])) { |
| 278 | $child = new PlHookTree(); |
| 279 | $child->aliased = $alias; |
| 280 | $element->children[$next] = $child; |
| 281 | } else { |
| 282 | $child = $element->children[$next]; |
| 283 | } |
| 284 | $element = $child; |
| 285 | } |
| 286 | $element->hook = $hook; |
| 287 | } |
| 288 | } |
| 289 | |
| 290 | public function findChild(array $path) |
| 291 | { |
| 292 | $remain = $path; |
| 293 | $matched = array(); |
| 294 | $aliased = array(); |
| 295 | $element = $this; |
| 296 | while (true) |
| 297 | { |
| 298 | $next = @$remain[0]; |
| 299 | if ($element->aliased) { |
| 300 | $aliased = $matched; |
| 301 | } |
| 302 | if (empty($next) || !isset($element->children[$next])) { |
| 303 | break; |
| 304 | } |
| 305 | $element = $element->children[$next]; |
| 306 | array_shift($remain); |
| 307 | $matched[] = $next; |
| 308 | } |
| 309 | return array($element->hook, $matched, $remain, $aliased); |
| 310 | } |
| 311 | |
| 312 | private function findNearestChildAux(array $remain, array $matched, array $aliased) |
| 313 | { |
| 314 | $next = @$remain[0]; |
| 315 | if ($this->aliased) { |
| 316 | $aliased = $matched; |
| 317 | } |
| 318 | if (!empty($next)) { |
| 319 | $child = @$this->children[$next]; |
| 320 | if (!$child) { |
| 321 | $nearest_lev = 50; |
| 322 | $nearest_sdx = 50; |
| 323 | $match = null; |
| 324 | foreach ($this->children as $path=>$hook) { |
| 325 | if ($path) { |
| 326 | $lev = levenshtein($next, $path); |
| 327 | if ($lev <= $nearest_lev |
| 328 | && ($lev < strlen($next) / 2 || strpos($next, $path) !== false |
| 329 | || strpos($path, $next) !== false)) { |
| 330 | $sdx = levenshtein(soundex($next), soundex($path)); |
| 331 | if ($lev == $nearest_lev || $sdx < $nearest_sdx) { |
| 332 | $child = $hook; |
| 333 | $nearest_lev = $lev; |
| 334 | $nearest_sdx = $sdx; |
| 335 | $match = $path; |
| 336 | } |
| 337 | } |
| 338 | } |
| 339 | } |
| 340 | $next = $match; |
| 341 | } |
| 342 | if ($child) { |
| 343 | array_shift($remain); |
| 344 | $matched[] = $next; |
| 345 | return $child->findNearestChildAux($remain, $matched, $aliased); |
| 346 | } |
| 347 | if (($pos = strpos($next, '.php')) !== false) { |
| 348 | $remain[0] = substr($next, 0, $pos); |
| 349 | return $this->findNearestChildAux($remain, $matched, $aliased); |
| 350 | } |
| 351 | } |
| 352 | return array($this->hook, $matched, $remain, $aliased); |
| 353 | } |
| 354 | |
| 355 | public function findNearestChild(array $path) |
| 356 | { |
| 357 | return $this->findNearestChildAux($path, array(), array()); |
| 358 | } |
| 359 | } |
| 360 | |
| 361 | abstract class Platal |
| 362 | { |
| 363 | private $mods; |
| 364 | private $hooks; |
| 365 | |
| 366 | protected $https; |
| 367 | |
| 368 | public $ns; |
| 369 | public $path; |
| 370 | public $argv = array(); |
| 371 | |
| 372 | static private $_page = null; |
| 373 | |
| 374 | public function __construct() |
| 375 | { |
| 376 | global $platal, $session, $globals; |
| 377 | $platal = $this; |
| 378 | |
| 379 | /* Assign globals first, then call init: init must be used for operations |
| 380 | * that requires access to the content of $globals (e.g. XDB requires |
| 381 | * $globals to be assigned. |
| 382 | */ |
| 383 | $globals = $this->buildGlobals(); |
| 384 | $globals->init(); |
| 385 | |
| 386 | /* Get the current session: assign first, then activate the session. |
| 387 | */ |
| 388 | $session = $this->buildSession(); |
| 389 | if (!$session->startAvailableAuth()) { |
| 390 | Platal::page()->trigError("Données d'authentification invalides."); |
| 391 | } |
| 392 | |
| 393 | $modules = func_get_args(); |
| 394 | if (isset($modules[0]) && is_array($modules[0])) { |
| 395 | $modules = $modules[0]; |
| 396 | } |
| 397 | $this->path = trim(Get::_get('n', null), '/'); |
| 398 | |
| 399 | $this->mods = array(); |
| 400 | $this->hooks = new PlHookTree(); |
| 401 | |
| 402 | array_unshift($modules, 'core'); |
| 403 | foreach ($modules as $module) { |
| 404 | $module = strtolower($module); |
| 405 | $this->mods[$module] = $m = PLModule::factory($module); |
| 406 | $this->hooks->addChildren($m->handlers()); |
| 407 | } |
| 408 | |
| 409 | if ($globals->mode == '') { |
| 410 | pl_redirect('index.html'); |
| 411 | } |
| 412 | } |
| 413 | |
| 414 | public function pl_self($n = null) |
| 415 | { |
| 416 | if (is_null($n)) |
| 417 | return $this->path; |
| 418 | |
| 419 | if ($n >= 0) |
| 420 | return join('/', array_slice($this->argv, 0, $n + 1)); |
| 421 | |
| 422 | if ($n <= -count($this->argv)) |
| 423 | return $this->argv[0]; |
| 424 | |
| 425 | return join('/', array_slice($this->argv, 0, $n)); |
| 426 | } |
| 427 | |
| 428 | public static function wiki_hook($auth = AUTH_PUBLIC, $perms = 'user', $type = DO_AUTH) |
| 429 | { |
| 430 | return new PlWikiHook($auth, $perms, $type); |
| 431 | } |
| 432 | |
| 433 | public function hook_map($name) |
| 434 | { |
| 435 | return null; |
| 436 | } |
| 437 | |
| 438 | protected function find_hook() |
| 439 | { |
| 440 | $p = explode('/', $this->path); |
| 441 | list($hook, $matched, $remain, $aliased) = $this->hooks->findChild($p); |
| 442 | if (empty($hook)) { |
| 443 | return null; |
| 444 | } |
| 445 | $this->argv = $remain; |
| 446 | array_unshift($this->argv, implode('/', $matched)); |
| 447 | if (!empty($aliased)) { |
| 448 | $this->ns = implode('/', $aliased) . '/'; |
| 449 | } |
| 450 | $this->https = !$hook->hasType(NO_HTTPS); |
| 451 | return $hook; |
| 452 | } |
| 453 | |
| 454 | public function near_hook() |
| 455 | { |
| 456 | $p = explode('/', $this->path); |
| 457 | list($hook, $matched, $remain, $aliased) = $this->hooks->findNearestChild($p); |
| 458 | if (empty($hook)) { |
| 459 | return null; |
| 460 | } |
| 461 | $url = implode('/', $matched); |
| 462 | if (!empty($remain)) { |
| 463 | $url .= '/' . implode('/', $remain); |
| 464 | } |
| 465 | if ($url == $this->path || levenshtein($url, $this->path) > strlen($url) / 3 |
| 466 | || !$hook->checkPerms()) { |
| 467 | return null; |
| 468 | } |
| 469 | return $url; |
| 470 | } |
| 471 | |
| 472 | private function call_hook(PlPage $page) |
| 473 | { |
| 474 | $hook = $this->find_hook(); |
| 475 | if (empty($hook)) { |
| 476 | return PL_NOT_FOUND; |
| 477 | } |
| 478 | global $globals, $session; |
| 479 | if ($this->https && !@$_SERVER['HTTPS'] && $globals->core->secure_domain) { |
| 480 | http_redirect('https://' . $globals->core->secure_domain . $_SERVER['REQUEST_URI']); |
| 481 | } |
| 482 | |
| 483 | return $hook->call($page, $this->argv); |
| 484 | } |
| 485 | |
| 486 | /** Show the authentication form. |
| 487 | */ |
| 488 | abstract public function force_login(PlPage $page); |
| 489 | |
| 490 | public function run() |
| 491 | { |
| 492 | $page =& self::page(); |
| 493 | |
| 494 | if (empty($this->path)) { |
| 495 | $this->path = 'index'; |
| 496 | } |
| 497 | |
| 498 | try { |
| 499 | $page->assign('platal', $this); |
| 500 | $res = $this->call_hook($page); |
| 501 | switch ($res) { |
| 502 | case PL_BAD_REQUEST: |
| 503 | $this->mods['core']->handler_400($page); |
| 504 | break; |
| 505 | |
| 506 | case PL_FORBIDDEN: |
| 507 | $this->mods['core']->handler_403($page); |
| 508 | break; |
| 509 | |
| 510 | case PL_NOT_FOUND: |
| 511 | $this->mods['core']->handler_404($page); |
| 512 | break; |
| 513 | |
| 514 | case PL_WIKI: |
| 515 | return PL_WIKI; |
| 516 | } |
| 517 | } catch (Exception $e) { |
| 518 | header($_SERVER['SERVER_PROTOCOL'] . ' 500 Internal Server Error'); |
| 519 | PlErrorReport::report($e); |
| 520 | if (self::globals()->debug) { |
| 521 | $page->kill(pl_entities($e->getMessage()) |
| 522 | . '<pre>' . pl_entities("" . $e) . '</pre>'); |
| 523 | } else { |
| 524 | $page->kill(pl_entities($e->getMessage())); |
| 525 | } |
| 526 | } |
| 527 | |
| 528 | $page->assign('platal', $this); |
| 529 | if ($res == PL_JSON) { |
| 530 | $page->runJSon(); |
| 531 | } else { |
| 532 | $page->run(); |
| 533 | } |
| 534 | } |
| 535 | |
| 536 | public function error403() |
| 537 | { |
| 538 | $page =& self::page(); |
| 539 | |
| 540 | $this->mods['core']->handler_403($page); |
| 541 | $page->assign('platal', $this); |
| 542 | $page->run(); |
| 543 | } |
| 544 | |
| 545 | public function error404() |
| 546 | { |
| 547 | $page =& self::page(); |
| 548 | |
| 549 | $this->mods['core']->handler_404($page); |
| 550 | $page->assign('platal', $this); |
| 551 | $page->run(); |
| 552 | } |
| 553 | |
| 554 | public static function notAllowed() |
| 555 | { |
| 556 | if (S::admin()) { |
| 557 | self::page()->trigWarning('Tu accèdes à cette page car tu es administrateur du site.'); |
| 558 | return false; |
| 559 | } else { |
| 560 | return true; |
| 561 | } |
| 562 | } |
| 563 | |
| 564 | public static function load($modname, $include = null) |
| 565 | { |
| 566 | global $platal; |
| 567 | $modname = strtolower($modname); |
| 568 | if (isset($platal->mods[$modname])) { |
| 569 | if (is_null($include)) { |
| 570 | return; |
| 571 | } |
| 572 | $platal->mods[$modname]->load($include); |
| 573 | } else { |
| 574 | if (is_null($include)) { |
| 575 | require_once PLModule::path($modname) . '.php'; |
| 576 | } else { |
| 577 | require_once PLModule::path($modname) . '/' . $include; |
| 578 | } |
| 579 | } |
| 580 | } |
| 581 | |
| 582 | public static function assert($cond, $error, $userfriendly = null) |
| 583 | { |
| 584 | if ($cond === false) { |
| 585 | if ($userfriendly == null) { |
| 586 | $userfriendly = "Une erreur interne s'est produite. |
| 587 | Merci de réessayer la manipulation qui a déclenché l'erreur ; |
| 588 | si cela ne fonctionne toujours pas, merci de nous signaler le problème rencontré."; |
| 589 | } |
| 590 | throw new PlException($userfriendly, $error); |
| 591 | } |
| 592 | } |
| 593 | |
| 594 | public function &buildLogger($uid, $suid = 0) |
| 595 | { |
| 596 | if (defined('PL_LOGGER_CLASS')) { |
| 597 | $class = PL_LOGGER_CLASS; |
| 598 | $logger = new $class($uid, $suid); |
| 599 | return $logger; |
| 600 | } else { |
| 601 | return PlLogger::dummy($uid, $suid); |
| 602 | } |
| 603 | } |
| 604 | |
| 605 | protected function &buildPage() |
| 606 | { |
| 607 | $pageclass = PL_PAGE_CLASS; |
| 608 | $page = new $pageclass(); |
| 609 | return $page; |
| 610 | } |
| 611 | |
| 612 | static public function &page() |
| 613 | { |
| 614 | if (is_null(self::$_page)) { |
| 615 | global $platal; |
| 616 | self::$_page = $platal->buildPage(); |
| 617 | } |
| 618 | return self::$_page; |
| 619 | } |
| 620 | |
| 621 | protected function &buildSession() |
| 622 | { |
| 623 | $sessionclass = PL_SESSION_CLASS; |
| 624 | $session = new $sessionclass(); |
| 625 | return $session; |
| 626 | } |
| 627 | |
| 628 | static public function &session() |
| 629 | { |
| 630 | global $session; |
| 631 | return $session; |
| 632 | } |
| 633 | |
| 634 | protected function &buildGlobals() |
| 635 | { |
| 636 | $globalclass = PL_GLOBALS_CLASS; |
| 637 | $globals = new $globalclass(); |
| 638 | return $globals; |
| 639 | } |
| 640 | |
| 641 | static public function &globals() |
| 642 | { |
| 643 | global $globals; |
| 644 | return $globals; |
| 645 | } |
| 646 | } |
| 647 | |
| 648 | // vim:set et sw=4 sts=4 sws=4 foldmethod=marker enc=utf-8: |
| 649 | ?> |