X-Git-Url: http://source.bookstackapp.com/bookstack/blobdiff_plain/9a470b07fdc2bbada54735bb9d07045b6ff937a9..refs/pull/1025/head:/app/Http/Controllers/Controller.php

diff --git a/app/Http/Controllers/Controller.php b/app/Http/Controllers/Controller.php
index ca022f7ca..33b57b7d9 100644
--- a/app/Http/Controllers/Controller.php
+++ b/app/Http/Controllers/Controller.php
@@ -2,13 +2,12 @@
 
 namespace BookStack\Http\Controllers;
 
-use HttpRequestException;
+use BookStack\Ownable;
 use Illuminate\Foundation\Bus\DispatchesJobs;
-use Illuminate\Http\Exception\HttpResponseException;
+use Illuminate\Http\Exceptions\HttpResponseException;
+use Illuminate\Http\Request;
 use Illuminate\Routing\Controller as BaseController;
 use Illuminate\Foundation\Validation\ValidatesRequests;
-use Illuminate\Support\Facades\Auth;
-use Illuminate\Support\Facades\Session;
 use BookStack\User;
 
 abstract class Controller extends BaseController
@@ -29,17 +28,21 @@ abstract class Controller extends BaseController
      */
     public function __construct()
     {
-        // Get a user instance for the current user
-        $user = auth()->user();
-        if (!$user) $user = User::getDefault();
+        $this->middleware(function ($request, $next) {
 
-        // Share variables with views
-        view()->share('signedIn', auth()->check());
-        view()->share('currentUser', $user);
+            // Get a user instance for the current user
+            $user = user();
 
-        // Share variables with controllers
-        $this->currentUser = $user;
-        $this->signedIn = auth()->check();
+            // Share variables with controllers
+            $this->currentUser = $user;
+            $this->signedIn = auth()->check();
+
+            // Share variables with views
+            view()->share('signedIn', $this->signedIn);
+            view()->share('currentUser', $user);
+
+            return $next($request);
+        });
     }
 
     /**
@@ -48,7 +51,9 @@ abstract class Controller extends BaseController
      */
     protected function preventAccessForDemoUsers()
     {
-        if (env('APP_ENV', 'production') === 'demo') $this->showPermissionError();
+        if (config('app.env') === 'demo') {
+            $this->showPermissionError();
+        }
     }
 
     /**
@@ -61,32 +66,48 @@ abstract class Controller extends BaseController
     }
 
     /**
-     * On a permission error redirect to home and display
+     * On a permission error redirect to home and display.
      * the error as a notification.
      */
     protected function showPermissionError()
     {
-        Session::flash('error', trans('errors.permission'));
-        throw new HttpResponseException(
-            redirect('/')
-        );
+        if (request()->wantsJson()) {
+            $response = response()->json(['error' => trans('errors.permissionJson')], 403);
+        } else {
+            $response = redirect('/');
+            session()->flash('error', trans('errors.permission'));
+        }
+
+        throw new HttpResponseException($response);
     }
 
     /**
      * Checks for a permission.
-     *
-     * @param $permissionName
+     * @param string $permissionName
      * @return bool|\Illuminate\Http\RedirectResponse
      */
     protected function checkPermission($permissionName)
     {
-        if (!$this->currentUser || !$this->currentUser->can($permissionName)) {
+        if (!user() || !user()->can($permissionName)) {
             $this->showPermissionError();
         }
-
         return true;
     }
 
+    /**
+     * Check the current user's permissions against an ownable item.
+     * @param $permission
+     * @param Ownable $ownable
+     * @return bool
+     */
+    protected function checkOwnablePermission($permission, Ownable $ownable)
+    {
+        if (userCan($permission, $ownable)) {
+            return true;
+        }
+        return $this->showPermissionError();
+    }
+
     /**
      * Check if a user has a permission or bypass if the callback is true.
      * @param $permissionName
@@ -96,8 +117,51 @@ abstract class Controller extends BaseController
     protected function checkPermissionOr($permissionName, $callback)
     {
         $callbackResult = $callback();
-        if ($callbackResult === false) $this->checkPermission($permissionName);
+        if ($callbackResult === false) {
+            $this->checkPermission($permissionName);
+        }
         return true;
     }
 
+    /**
+     * Send back a json error message.
+     * @param string $messageText
+     * @param int $statusCode
+     * @return mixed
+     */
+    protected function jsonError($messageText = "", $statusCode = 500)
+    {
+        return response()->json(['message' => $messageText], $statusCode);
+    }
+
+    /**
+     * Create the response for when a request fails validation.
+     * @param  \Illuminate\Http\Request  $request
+     * @param  array  $errors
+     * @return \Symfony\Component\HttpFoundation\Response
+     */
+    protected function buildFailedValidationResponse(Request $request, array $errors)
+    {
+        if ($request->expectsJson()) {
+            return response()->json(['validation' => $errors], 422);
+        }
+
+        return redirect()->to($this->getRedirectUrl())
+            ->withInput($request->input())
+            ->withErrors($errors, $this->errorBag());
+    }
+
+    /**
+     * Create a response that forces a download in the browser.
+     * @param string $content
+     * @param string $fileName
+     * @return \Illuminate\Http\Response
+     */
+    protected function downloadResponse(string $content, string $fileName)
+    {
+        return response()->make($content, 200, [
+            'Content-Type'        => 'application/octet-stream',
+            'Content-Disposition' => 'attachment; filename="' . $fileName . '"'
+        ]);
+    }
 }