fix(jellyfinlogin): add proper error message when no admin user exists (#1216)

This PR adds an error message when the database has no admin user and Jellyseerr has already been
set up (i.e. settings.json is filled in), instead of having a generic error message.

server/constants/error.ts

@@ -4,6 +4,7 @@ export enum ApiErrorCode {
   InvalidAuthToken = 'INVALID_AUTH_TOKEN',
   InvalidEmail = 'INVALID_EMAIL',
   NotAdmin = 'NOT_ADMIN',
+  NoAdminUser = 'NO_ADMIN_USER',
   SyncErrorGroupedFolders = 'SYNC_ERROR_GROUPED_FOLDERS',
   SyncErrorNoLibraries = 'SYNC_ERROR_NO_LIBRARIES',
   Unknown = 'UNKNOWN',

server/routes/auth.ts

@@ -313,7 +313,7 @@ authRoutes.post('/jellyfin', async (req, res, next) => {
         body.serverType !== MediaServerType.JELLYFIN &&
         body.serverType !== MediaServerType.EMBY
       ) {
-        throw new Error('select_server_type');
+        throw new ApiError(500, ApiErrorCode.NoAdminUser);
       }
       settings.main.mediaServerType = body.serverType;
 
@@ -533,6 +533,22 @@ authRoutes.post('/jellyfin', async (req, res, next) => {
           message: e.errorCode,
         });
 
+      case ApiErrorCode.NoAdminUser:
+        logger.warn(
+          'Failed login attempt from user without admin permissions and no admin user exists',
+          {
+            label: 'Auth',
+            account: {
+              ip: req.ip,
+              email: body.username,
+            },
+          }
+        );
+        return next({
+          status: e.statusCode,
+          message: e.errorCode,
+        });
+
       default:
         logger.error(e.message, { label: 'Auth' });
         return next({

src/components/Login/JellyfinLogin.tsx

@@ -34,6 +34,7 @@ const messages = defineMessages('components.Login', {
   validationUrlBaseTrailingSlash: 'URL base must not end in a trailing slash',
   loginerror: 'Something went wrong while trying to sign in.',
   adminerror: 'You must use an admin account to sign in.',
+  noadminerror: 'No admin user found on the server.',
   credentialerror: 'The username or password is incorrect.',
   invalidurlerror: 'Unable to connect to {mediaServerName} server.',
   signingin: 'Signing in…',
@@ -157,6 +158,9 @@ const JellyfinLogin: React.FC<JellyfinLoginProps> = ({
               case ApiErrorCode.NotAdmin:
                 errorMessage = messages.adminerror;
                 break;
+              case ApiErrorCode.NoAdminUser:
+                errorMessage = messages.noadminerror;
+                break;
               default:
                 errorMessage = messages.loginerror;
                 break;
@@ -388,14 +392,35 @@ const JellyfinLogin: React.FC<JellyfinLoginProps> = ({
                   email: values.username,
                 }),
               });
-              if (!res.ok) throw new Error();
+              if (!res.ok) throw new Error(res.statusText, { cause: res });
             } catch (e) {
+              let errorData;
+              try {
+                errorData = await e.cause?.text();
+                errorData = JSON.parse(errorData);
+              } catch {
+                /* empty */
+              }
+              let errorMessage = null;
+              switch (errorData?.message) {
+                case ApiErrorCode.InvalidUrl:
+                  errorMessage = messages.invalidurlerror;
+                  break;
+                case ApiErrorCode.InvalidCredentials:
+                  errorMessage = messages.credentialerror;
+                  break;
+                case ApiErrorCode.NotAdmin:
+                  errorMessage = messages.adminerror;
+                  break;
+                case ApiErrorCode.NoAdminUser:
+                  errorMessage = messages.noadminerror;
+                  break;
+                default:
+                  errorMessage = messages.loginerror;
+                  break;
+              }
               toasts.addToast(
-                intl.formatMessage(
+                intl.formatMessage(errorMessage, mediaServerFormatValues),
-                  e.message == 'Request failed with status code 401'
-                    ? messages.credentialerror
-                    : messages.loginerror
-                ),
                 {
                   autoDismiss: true,
                   appearance: 'error',