Move mod/maintenance to src/Module/Maintenance

mod/maintenance.php

@@ -1,29 +0,0 @@
-<?php
-/**
- * @file mod/maintenance.php
- */
-use Friendica\App;
-use Friendica\Core\Config;
-use Friendica\Core\L10n;
-use Friendica\Core\Renderer;
-use Friendica\Util\Strings;
-
-function maintenance_content(App $a)
-{
-	$reason = Config::get('system', 'maintenance_reason');
-
-	if (substr(Strings::normaliseLink($reason), 0, 7) == 'http://') {
-		header("HTTP/1.1 307 Temporary Redirect");
-		header("Location:".$reason);
-		return;
-	}
-
-	header('HTTP/1.1 503 Service Temporarily Unavailable');
-	header('Status: 503 Service Temporarily Unavailable');
-	header('Retry-After: 600');
-
-	return Renderer::replaceMacros(Renderer::getMarkupTemplate('maintenance.tpl'), [
-		'$sysdown' => L10n::t('System down for maintenance'),
-		'$reason' => $reason
-	]);
-}

src/App.php

@@ -1077,10 +1077,10 @@ class App
 
 		// in install mode, any url loads install module
 		// but we need "view" module for stylesheet
-		if ($this->getMode()->isInstall() && $this->module != 'view') {
+		if ($this->getMode()->isInstall() && $this->module !== 'install') {
-			$this->module = 'install';
+			$this->internalRedirect('install');
-		} elseif (!$this->getMode()->has(App\Mode::MAINTENANCEDISABLED) && $this->module != 'view') {
+		} elseif (!$this->getMode()->has(App\Mode::MAINTENANCEDISABLED) && $this->module !== 'maintenance') {
-			$this->module = 'maintenance';
+			$this->internalRedirect('maintenance');
 		} else {
 			$this->checkURL();
 			Core\Update::check($this->getBasePath(), false, $this->getMode());

src/App/Router.php

@@ -138,6 +138,7 @@ class Router
 		$this->routeCollector->addRoute(['GET', 'POST'], '/login',               Module\Login::class);
 		$this->routeCollector->addRoute(['GET', 'POST'], '/logout',              Module\Logout::class);
 		$this->routeCollector->addRoute(['GET'],         '/magic',               Module\Magic::class);
+		$this->routeCollector->addRoute(['GET'],         '/maintenance',         Module\Maintenance::class);
 		$this->routeCollector->addRoute(['GET'],         '/manifest',            Module\Manifest::class);
 		$this->routeCollector->addRoute(['GET'],         '/nodeinfo/1.0',        Module\NodeInfo::class);
 		$this->routeCollector->addRoute(['GET'],         '/nogroup',             Module\Group::class);

src/Core/System.php

@@ -242,6 +242,9 @@ class System extends BaseObject
 			case 301:
 				header('HTTP/1.1 301 Moved Permanently');
 				break;
+			case 307:
+				header('HTTP/1.1 307 Temporary Redirect');
+				break;
 		}
 
 		header("Location: $url");

src/Module/Maintenance.php

@@ -0,0 +1,37 @@
+<?php
+
+namespace Friendica\Module;
+
+use Friendica\BaseModule;
+use Friendica\Core\L10n;
+use Friendica\Core\Renderer;
+use Friendica\Core\System;
+use Friendica\Util\Strings;
+
+/**
+ * Shows the maintenance reason
+ * or redirects to the alternate location
+ */
+class Maintenance extends BaseModule
+{
+	public static function content()
+	{
+		$config = self::getApp()->getConfig();
+
+		$reason = $config->get('system', 'maintenance_reason');
+
+		if ((substr(Strings::normaliseLink($reason), 0, 7) === 'http://') ||
+			(substr(Strings::normaliseLink($reason), 0, 8) === 'https://')) {
+			System::externalRedirect($reason, 307);
+		}
+
+		header('HTTP/1.1 503 Service Temporarily Unavailable');
+		header('Status: 503 Service Temporarily Unavailable');
+		header('Retry-After: 600');
+
+		return Renderer::replaceMacros(Renderer::getMarkupTemplate('maintenance.tpl'), [
+			'$sysdown' => L10n::t('System down for maintenance'),
+			'$reason' => $reason
+		]);
+	}
+}