X-Git-Url: http://source.bookstackapp.com/bookstack/blobdiff_plain/c32d70abc4f3cca4a8b3533d45b09d2a830d6a57..0930e8519c508d46a848db93c76f258da5ee84a9:/app/Http/Controllers/Controller.php

diff --git a/app/Http/Controllers/Controller.php b/app/Http/Controllers/Controller.php
index 5dc79eb02..d616974c6 100644
--- a/app/Http/Controllers/Controller.php
+++ b/app/Http/Controllers/Controller.php
@@ -2,78 +2,178 @@
 
 namespace BookStack\Http\Controllers;
 
-use HttpRequestException;
+use BookStack\Exceptions\NotifyException;
+use BookStack\Facades\Activity;
+use BookStack\Interfaces\Loggable;
+use BookStack\Model;
+use BookStack\Util\WebSafeMimeSniffer;
 use Illuminate\Foundation\Bus\DispatchesJobs;
-use Illuminate\Http\Exception\HttpResponseException;
-use Illuminate\Routing\Controller as BaseController;
 use Illuminate\Foundation\Validation\ValidatesRequests;
-use Illuminate\Support\Facades\Auth;
-use Illuminate\Support\Facades\Session;
-use BookStack\User;
+use Illuminate\Http\JsonResponse;
+use Illuminate\Http\Response;
+use Illuminate\Routing\Controller as BaseController;
 
 abstract class Controller extends BaseController
 {
-    use DispatchesJobs, ValidatesRequests;
+    use DispatchesJobs;
+    use ValidatesRequests;
 
     /**
-     * @var User static
+     * Check if the current user is signed in.
      */
-    protected $currentUser;
+    protected function isSignedIn(): bool
+    {
+        return auth()->check();
+    }
+
     /**
-     * @var bool
+     * Stops the application and shows a permission error if
+     * the application is in demo mode.
      */
-    protected $signedIn;
+    protected function preventAccessInDemoMode()
+    {
+        if (config('app.env') === 'demo') {
+            $this->showPermissionError();
+        }
+    }
 
     /**
-     * Controller constructor.
+     * Adds the page title into the view.
      */
-    public function __construct()
+    public function setPageTitle(string $title)
     {
-        // Get a user instance for the current user
-        $user = auth()->user();
-        if (!$user) $user = User::getDefault();
+        view()->share('pageTitle', $title);
+    }
 
-        // Share variables with views
-        view()->share('signedIn', auth()->check());
-        view()->share('currentUser', $user);
+    /**
+     * On a permission error redirect to home and display.
+     * the error as a notification.
+     *
+     * @return never
+     */
+    protected function showPermissionError()
+    {
+        $message = request()->wantsJson() ? trans('errors.permissionJson') : trans('errors.permission');
 
-        // Share variables with controllers
-        $this->currentUser = $user;
-        $this->signedIn = auth()->check();
+        throw new NotifyException($message, '/', 403);
     }
 
     /**
-     * Adds the page title into the view.
-     * @param $title
+     * Checks that the current user has the given permission otherwise throw an exception.
      */
-    public function setPageTitle($title)
+    protected function checkPermission(string $permission): void
     {
-        view()->share('pageTitle', $title);
+        if (!user() || !user()->can($permission)) {
+            $this->showPermissionError();
+        }
     }
 
     /**
-     * Checks for a permission.
-     *
-     * @param $permissionName
-     * @return bool|\Illuminate\Http\RedirectResponse
+     * Check the current user's permissions against an ownable item otherwise throw an exception.
      */
-    protected function checkPermission($permissionName)
+    protected function checkOwnablePermission(string $permission, Model $ownable): void
     {
-        if (!$this->currentUser || !$this->currentUser->can($permissionName)) {
-            Session::flash('error', trans('errors.permission'));
-            throw new HttpResponseException(
-                redirect('/')
-            );
+        if (!userCan($permission, $ownable)) {
+            $this->showPermissionError();
         }
+    }
 
-        return true;
+    /**
+     * Check if a user has a permission or bypass the permission
+     * check if the given callback resolves true.
+     */
+    protected function checkPermissionOr(string $permission, callable $callback): void
+    {
+        if ($callback() !== true) {
+            $this->checkPermission($permission);
+        }
     }
 
-    protected function checkPermissionOr($permissionName, $callback)
+    /**
+     * Check if the current user has a permission or bypass if the provided user
+     * id matches the current user.
+     */
+    protected function checkPermissionOrCurrentUser(string $permission, int $userId): void
     {
-        $callbackResult = $callback();
-        if ($callbackResult === false) $this->checkPermission($permissionName);
-        return true;
+        $this->checkPermissionOr($permission, function () use ($userId) {
+            return $userId === user()->id;
+        });
     }
 
+    /**
+     * Send back a json error message.
+     */
+    protected function jsonError(string $messageText = '', int $statusCode = 500): JsonResponse
+    {
+        return response()->json(['message' => $messageText, 'status' => 'error'], $statusCode);
+    }
+
+    /**
+     * Create a response that forces a download in the browser.
+     */
+    protected function downloadResponse(string $content, string $fileName): Response
+    {
+        return response()->make($content, 200, [
+            'Content-Type'           => 'application/octet-stream',
+            'Content-Disposition'    => 'attachment; filename="' . $fileName . '"',
+            'X-Content-Type-Options' => 'nosniff',
+        ]);
+    }
+
+    /**
+     * Create a file download response that provides the file with a content-type
+     * correct for the file, in a way so the browser can show the content in browser.
+     */
+    protected function inlineDownloadResponse(string $content, string $fileName): Response
+    {
+        $mime = (new WebSafeMimeSniffer())->sniff($content);
+
+        return response()->make($content, 200, [
+            'Content-Type'           => $mime,
+            'Content-Disposition'    => 'inline; filename="' . $fileName . '"',
+            'X-Content-Type-Options' => 'nosniff',
+        ]);
+    }
+
+    /**
+     * Show a positive, successful notification to the user on next view load.
+     */
+    protected function showSuccessNotification(string $message): void
+    {
+        session()->flash('success', $message);
+    }
+
+    /**
+     * Show a warning notification to the user on next view load.
+     */
+    protected function showWarningNotification(string $message): void
+    {
+        session()->flash('warning', $message);
+    }
+
+    /**
+     * Show an error notification to the user on next view load.
+     */
+    protected function showErrorNotification(string $message): void
+    {
+        session()->flash('error', $message);
+    }
+
+    /**
+     * Log an activity in the system.
+     *
+     * @param string|Loggable $detail
+     */
+    protected function logActivity(string $type, $detail = ''): void
+    {
+        Activity::add($type, $detail);
+    }
+
+    /**
+     * Get the validation rules for image files.
+     */
+    protected function getImageValidationRules(): array
+    {
+        return ['image_extension', 'mimes:jpeg,png,gif,webp', 'max:' . (config('app.upload_limit') * 1000)];
+    }
 }