Refactoring: added controlled middleware and changed response class

app/Middleware/ProjectAuthorizationMiddleware.php

@@ -0,0 +1,34 @@
+<?php
+
+namespace Kanboard\Middleware;
+
+use Kanboard\Core\Controller\AccessForbiddenException;
+use Kanboard\Core\Controller\BaseMiddleware;
+
+/**
+ * Class ProjectAuthorizationMiddleware
+ *
+ * @package Kanboard\Middleware
+ * @author  Frederic Guillot
+ */
+class ProjectAuthorizationMiddleware extends BaseMiddleware
+{
+    /**
+     * Execute middleware
+     */
+    public function execute()
+    {
+        $project_id = $this->request->getIntegerParam('project_id');
+        $task_id = $this->request->getIntegerParam('task_id');
+
+        if ($task_id > 0 && $project_id === 0) {
+            $project_id = $this->taskFinder->getProjectId($task_id);
+        }
+
+        if ($project_id > 0 && ! $this->helper->user->hasProjectAccess($this->router->getController(), $this->router->getAction(), $project_id)) {
+            throw new AccessForbiddenException();
+        }
+
+        $this->next();
+    }
+}