silverstripe-cms/code/Controllers/RootURLController.php

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<?php
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namespace SilverStripe\CMS\Controllers;
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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\Core\ClassInfo;
use SilverStripe\Core\Config\Config;
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use SilverStripe\Core\Resettable;
use SilverStripe\ORM\DB;
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class RootURLController extends Controller implements Resettable
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{
/**
* @var bool
*/
protected static $is_at_root = false;
/**
* @config
* @var string
*/
private static $default_homepage_link = 'home';
/**
* @var string
*/
protected static $cached_homepage_link;
/**
* Get the full form (e.g. /home/) relative link to the home page for the current HTTP_HOST value. Note that the
* link is trimmed of leading and trailing slashes before returning to ensure consistency.
*
* @return string
*/
public static function get_homepage_link()
{
if (!self::$cached_homepage_link) {
$link = Config::inst()->get(__CLASS__, 'default_homepage_link');
singleton(__CLASS__)->extend('updateHomepageLink', $link);
self::$cached_homepage_link = $link;
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}
return self::$cached_homepage_link;
}
/**
* Returns TRUE if a request to a certain page should be redirected to the site root (i.e. if the page acts as the
* home page).
*
* @param SiteTree $page
* @return bool
*/
public static function should_be_on_root(SiteTree $page)
{
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return (!self::$is_at_root && self::get_homepage_link() == trim($page->RelativeLink(true) ?? '', '/'));
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}
/**
* Resets the cached homepage link value - useful for testing.
*/
public static function reset()
{
self::$cached_homepage_link = null;
}
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protected function beforeHandleRequest(HTTPRequest $request)
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{
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parent::beforeHandleRequest($request);
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self::$is_at_root = true;
/** @skipUpgrade */
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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));
}
}
public function handleRequest(HTTPRequest $request): HTTPResponse
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{
self::$is_at_root = true;
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$this->beforeHandleRequest($request);
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if (!$this->getResponse()->isFinished()) {
/** @skipUpgrade */
if (!DB::is_active() || !ClassInfo::hasTable('SiteTree')) {
$this->getResponse()->redirect(Director::absoluteBaseURL() . 'dev/build?returnURL=' . (isset($_GET['url']) ? urlencode($_GET['url']) : null));
return $this->getResponse();
}
$request->setUrl(self::get_homepage_link() . '/');
$request->match('$URLSegment//$Action', true);
$controller = new ModelAsController();
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$response = $controller->handleRequest($request);
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$this->prepareResponse($response);
}
$this->afterHandleRequest();
return $this->getResponse();
}
}