Users: Improved user response for failed invite sending

Added specific handling to show relevant error message when user
creation fails due to invite sending errors, while also returning user
to the form with previous input.
Includes test to cover.

For #5195

app/Access/UserInviteException.php

@@ -0,0 +1,10 @@
+<?php
+
+namespace BookStack\Access;
+
+use Exception;
+
+class UserInviteException extends Exception
+{
+    //
+}

app/Access/UserInviteService.php

@@ -13,11 +13,17 @@ class UserInviteService extends UserTokenService
     /**
      * Send an invitation to a user to sign into BookStack
      * Removes existing invitation tokens.
+     * @throws UserInviteException
      */
     public function sendInvitation(User $user)
     {
         $this->deleteByUser($user);
         $token = $this->createTokenForUser($user);
+
+        try {
             $user->notify(new UserInviteNotification($token));
+        } catch (\Exception $exception) {
+            throw new UserInviteException($exception->getMessage(), $exception->getCode(), $exception);
+        }
     }
 }

app/Users/Controllers/UserController.php

@@ -3,6 +3,7 @@
 namespace BookStack\Users\Controllers;
 
 use BookStack\Access\SocialDriverManager;
+use BookStack\Access\UserInviteException;
 use BookStack\Exceptions\ImageUploadException;
 use BookStack\Exceptions\UserUpdateException;
 use BookStack\Http\Controller;
@@ -14,6 +15,7 @@ use BookStack\Util\SimpleListOptions;
 use Exception;
 use Illuminate\Http\Request;
 use Illuminate\Support\Facades\DB;
+use Illuminate\Support\Facades\Log;
 use Illuminate\Validation\Rules\Password;
 use Illuminate\Validation\ValidationException;
 
@@ -91,9 +93,16 @@ class UserController extends Controller
 
         $validated = $this->validate($request, array_filter($validationRules));
 
+        try {
             DB::transaction(function () use ($validated, $sendInvite) {
                 $this->userRepo->create($validated, $sendInvite);
+                dd('post-create');
             });
+        } catch (UserInviteException $e) {
+            Log::error("Failed to send user invite with error: {$e->getMessage()}");
+            $this->showErrorNotification(trans('errors.users_could_not_send_invite'));
+            return redirect('/settings/users/create')->withInput();
+        }
 
         return redirect('/settings/users');
     }

app/Users/UserRepo.php

@@ -2,6 +2,7 @@
 
 namespace BookStack\Users;
 
+use BookStack\Access\UserInviteException;
 use BookStack\Access\UserInviteService;
 use BookStack\Activity\ActivityType;
 use BookStack\Entities\EntityProvider;
@@ -83,6 +84,7 @@ class UserRepo
      * As per "createWithoutActivity" but records a "create" activity.
      *
      * @param array{name: string, email: string, password: ?string, external_auth_id: ?string, language: ?string, roles: ?array} $data
+     * @throws UserInviteException
      */
     public function create(array $data, bool $sendInvite = false): User
     {

lang/en/errors.php

@@ -78,6 +78,7 @@ return [
     // Users
     'users_cannot_delete_only_admin' => 'You cannot delete the only admin',
     'users_cannot_delete_guest' => 'You cannot delete the guest user',
+    'users_could_not_send_invite' => 'Could not create user since invite email failed to send',
 
     // Roles
     'role_cannot_be_edited' => 'This role cannot be edited',

tests/User/UserManagementTest.php

@@ -2,6 +2,7 @@
 
 namespace Tests\User;
 
+use BookStack\Access\UserInviteException;
 use BookStack\Access\UserInviteService;
 use BookStack\Activity\ActivityType;
 use BookStack\Uploads\Image;
@@ -229,7 +230,7 @@ class UserManagementTest extends TestCase
 
         // Simulate an invitation sending failure
         $this->mock(UserInviteService::class, function (MockInterface $mock) {
-            $mock->shouldReceive('sendInvitation')->once()->andThrow(RuntimeException::class);
+            $mock->shouldReceive('sendInvitation')->once()->andThrow(UserInviteException::class);
         });
 
         $this->asAdmin()->post('/settings/users/create', [
@@ -247,22 +248,42 @@ class UserManagementTest extends TestCase
     {
         /** @var User $user */
         $user = User::factory()->make();
-        $adminRole = Role::getRole('admin');
 
         $this->mock(UserInviteService::class, function (MockInterface $mock) {
-            $mock->shouldReceive('sendInvitation')->once()->andThrow(RuntimeException::class);
+            $mock->shouldReceive('sendInvitation')->once()->andThrow(UserInviteException::class);
         });
 
         $this->asAdmin()->post('/settings/users/create', [
             'name'                          => $user->name,
             'email'                         => $user->email,
             'send_invite'                   => 'true',
-            'roles[' . $adminRole->id . ']' => 'true',
         ]);
 
         $this->assertDatabaseMissing('activities', ['type' => 'USER_CREATE']);
     }
 
+    public function test_return_to_form_with_warning_if_the_invitation_sending_fails()
+    {
+        $logger = $this->withTestLogger();
+        /** @var User $user */
+        $user = User::factory()->make();
+
+        $this->mock(UserInviteService::class, function (MockInterface $mock) {
+            $mock->shouldReceive('sendInvitation')->once()->andThrow(UserInviteException::class);
+        });
+
+        $resp = $this->asAdmin()->post('/settings/users/create', [
+            'name'                          => $user->name,
+            'email'                         => $user->email,
+            'send_invite'                   => 'true',
+        ]);
+
+        $resp->assertRedirect('/settings/users/create');
+        $this->assertSessionError('Could not create user since invite email failed to send');
+        $this->assertEquals($user->email, session()->getOldInput('email'));
+        $this->assertTrue($logger->hasErrorThatContains('Failed to send user invite with error:'));
+    }
+
     public function test_user_create_update_fails_if_locale_is_invalid()
     {
         $user = $this->users->editor();