re-add App::isBackend()

src/App.php

@@ -100,8 +100,6 @@ class App
 
 	/**
 	 * @var bool true, if the call is from an backend node (f.e. worker)
-	 *
-	 * @deprecated 2019.09 - use App\Module->isBackend() instead
 	 */
 	private $isBackend;
 
@@ -287,7 +285,7 @@ class App
 		$this->logger   = $logger;
 		$this->l10n     = $l10n;
 		$this->args = $args;
-		$this->isBackend = $module->isBackend();
+		$this->isBackend = $this->checkBackend($module);
 
 		$this->profiler->reset();
 
@@ -575,6 +573,29 @@ class App
 			$this->getBaseURL();
 	}
 
+	/**
+	 * Checks if the site is called via a backend process
+	 *
+	 * @param Module $module The pre-loaded module (just name, not class!)
+
+	 * @return bool True, if the call is a backend call
+	 */
+	private function checkBackend(Module $module)
+	{
+		return basename(($_SERVER['PHP_SELF'] ?? ''), '.php') !== 'index' ||
+		       $module->isBackend();
+	}
+
+	/**
+	 * Returns true, if the call is from a backend node (f.e. from a worker)
+	 *
+	 * @return bool Is it a known backend?
+	 */
+	public function isBackend()
+	{
+		return $this->isBackend;
+	}
+
 	/**
 	 * @brief Checks if the maximum number of database processes is reached
 	 *
@@ -668,7 +689,7 @@ class App
 	 */
 	public function isMaxLoadReached()
 	{
-		if ($this->isBackend) {
+		if ($this->isBackend()) {
 			$process = 'backend';
 			$maxsysload = intval($this->config->get('system', 'maxloadavg'));
 			if ($maxsysload < 1) {

src/App/Module.php

@@ -87,7 +87,8 @@ class Module
 	}
 
 	/**
-	 * @return bool
+	 * @return bool True, if the current module is a backend module
+	 * @see Module::BACKEND_MODULES for a list
 	 */
 	public function isBackend()
 	{
@@ -124,7 +125,7 @@ class Module
 			$module = "login";
 		}
 
-		$isBackend = $this->checkBackend($module, $server);
+		$isBackend = in_array($module, Module::BACKEND_MODULES);;
 
 		return new Module($module, $this->module_class, $isBackend, $this->printNotAllowedAddon);
 	}
@@ -258,22 +259,4 @@ class Module
 		Core\Hook::callAll($this->module . '_mod_afterpost', $placeholder);
 		call_user_func([$this->module_class, 'afterpost']);
 	}
-
-	/**
-	 * @brief Checks if the site is called via a backend process
-	 *
-	 * This isn't a perfect solution. But we need this check very early.
-	 * So we cannot wait until the modules are loaded.
-	 *
-	 * @param string $module The determined module
-	 * @param array  $server The $_SERVER variable
-	 *
-	 * @return bool True, if the current module is called at backend
-	 */
-	private function checkBackend($module, array $server)
-	{
-		// Check if current module is in backend or backend flag is set
-		return basename(($server['PHP_SELF'] ?? ''), '.php') !== 'index' &&
-		       in_array($module, Module::BACKEND_MODULES);
-	}
 }