silverstripe-cms/code/Controllers/ModelAsController.php

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<?php
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namespace SilverStripe\CMS\Controllers;
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use Exception;
use SilverStripe\CMS\Model\SiteTree;
use SilverStripe\Control\Controller;
use SilverStripe\Control\Director;
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use SilverStripe\Control\HTTPRequest;
use SilverStripe\Control\HTTPResponse;
use SilverStripe\Control\HTTPResponse_Exception;
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use SilverStripe\Control\NestedController;
use SilverStripe\Control\RequestHandler;
use SilverStripe\Core\ClassInfo;
use SilverStripe\Core\Injector\Injector;
use SilverStripe\Dev\Debug;
use SilverStripe\ORM\DataObject;
use SilverStripe\ORM\DB;
use SilverStripe\View\Parsers\URLSegmentFilter;
/**
* ModelAsController deals with mapping the initial request to the first {@link SiteTree}/{@link ContentController}
* pair, which are then used to handle the request.
*/
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class ModelAsController extends Controller implements NestedController
{
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private static $extensions = [
OldPageRedirector::class,
];
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/**
* Get the appropriate {@link ContentController} for handling a {@link SiteTree} object, link it to the object and
* return it.
*
* @param string $action
*/
public static function controller_for(SiteTree $sitetree, $action = null): ContentController
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{
$controller = $sitetree->getControllerName();
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if ($action && class_exists($controller . '_' . ucfirst($action ?? ''))) {
$controller = $controller . '_' . ucfirst($action ?? '');
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}
return Injector::inst()->create($controller, $sitetree);
}
protected function init()
{
singleton(SiteTree::class)->extend('modelascontrollerInit', $this);
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parent::init();
}
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protected function beforeHandleRequest(HTTPRequest $request)
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{
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parent::beforeHandleRequest($request);
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// If the database has not yet been created, redirect to the build page.
if (!DB::is_active() || !ClassInfo::hasTable('SiteTree')) {
$this->getResponse()->redirect(Controller::join_links(
Director::absoluteBaseURL(),
'dev/build',
'?' . http_build_query([
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'returnURL' => isset($_GET['url']) ? $_GET['url'] : null,
])
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));
}
}
/**
* @uses ModelAsController::getNestedController()
*/
public function handleRequest(HTTPRequest $request): HTTPResponse
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{
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$this->beforeHandleRequest($request);
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// If we had a redirection or something, halt processing.
if ($this->getResponse()->isFinished()) {
$this->popCurrent();
return $this->getResponse();
}
// If the database has not yet been created, redirect to the build page.
if (!DB::is_active() || !ClassInfo::hasTable('SiteTree')) {
$this->getResponse()->redirect(Controller::join_links(Director::absoluteBaseURL(), 'dev/build?returnURL=' . (isset($_GET['url']) ? urlencode($_GET['url']) : null)));
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$this->popCurrent();
return $this->getResponse();
}
try {
$result = $this->getNestedController()->handleRequest($this->getRequest());
$result = $result;
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} catch (HTTPResponse_Exception $responseException) {
$result = $responseException->getResponse();
}
$this->popCurrent();
return $result;
}
/**
* @throws Exception If URLSegment not passed in as a request parameter.
*/
public function getNestedController(): ContentController
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{
$request = $this->getRequest();
$urlSegment = $request->param('URLSegment');
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if ($urlSegment === false || $urlSegment === null || $urlSegment === '') {
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throw new Exception('ModelAsController->getNestedController(): was not passed a URLSegment value.');
}
// url encode unless it's multibyte (already pre-encoded in the database)
$filter = URLSegmentFilter::create();
if (!$filter->getAllowMultibyte()) {
$urlSegment = rawurlencode($urlSegment ?? '');
}
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// Select child page
$tableName = DataObject::singleton(SiteTree::class)->baseTable();
$conditions = [sprintf('"%s"."URLSegment"', $tableName) => $urlSegment];
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if (SiteTree::config()->get('nested_urls')) {
$conditions[] = [sprintf('"%s"."ParentID"', $tableName) => 0];
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}
/** @var SiteTree $sitetree */
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$sitetree = DataObject::get_one(SiteTree::class, $conditions);
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if (!$sitetree) {
$this->httpError(404, 'The requested page could not be found.');
}
if (isset($_REQUEST['debug'])) {
Debug::message("Using record #$sitetree->ID of type " . get_class($sitetree) . " with link {$sitetree->Link()}");
}
return self::controller_for($sitetree, $this->getRequest()->param('Action'));
}
}