enhancement(auth): better error message handling

Signed-off-by: Erik Michelson <github@erik.michelson.eu>

backend/src/api/utils/login-enabled.guard.ts

@@ -3,14 +3,10 @@
  *
  * SPDX-License-Identifier: AGPL-3.0-only
  */
-import {
-  BadRequestException,
-  CanActivate,
-  Inject,
-  Injectable,
-} from '@nestjs/common';
+import { CanActivate, Inject, Injectable } from '@nestjs/common';
 
 import authConfiguration, { AuthConfig } from '../../config/auth.config';
+import { FeatureDisabledError } from '../../errors/errors';
 import { ConsoleLoggerService } from '../../logger/console-logger.service';
 
 @Injectable()
@@ -26,7 +22,7 @@ export class LoginEnabledGuard implements CanActivate {
   canActivate(): boolean {
     if (!this.authConfig.local.enableLogin) {
       this.logger.debug('Local auth is disabled.', 'canActivate');
-      throw new BadRequestException('Local auth is disabled.');
+      throw new FeatureDisabledError('Local auth is disabled.');
     }
     return true;
   }

backend/src/api/utils/registration-enabled.guard.ts

@@ -6,7 +6,7 @@
 import { CanActivate, Inject, Injectable } from '@nestjs/common';
 
 import authConfiguration, { AuthConfig } from '../../config/auth.config';
-import { RegistrationDisabledError } from '../../errors/errors';
+import { FeatureDisabledError } from '../../errors/errors';
 import { ConsoleLoggerService } from '../../logger/console-logger.service';
 
 @Injectable()
@@ -22,7 +22,7 @@ export class RegistrationEnabledGuard implements CanActivate {
   canActivate(): boolean {
     if (!this.authConfig.local.enableRegister) {
       this.logger.debug('User registration is disabled.', 'canActivate');
-      throw new RegistrationDisabledError();
+      throw new FeatureDisabledError('User registration is disabled');
     }
     return true;
   }

backend/src/errors/error-mapping.ts

@@ -77,7 +77,7 @@ const mapOfHedgeDocErrorsToHttpErrors: Map<string, HttpExceptionConstructor> =
       (object): HttpException => new PayloadTooLargeException(object),
     ],
     [
-      'RegistrationDisabledError',
+      'FeatureDisabledError',
       (object): HttpException => new ForbiddenException(object),
     ],
   ]);

backend/src/errors/errors.ts

@@ -60,6 +60,6 @@ export class MaximumDocumentLengthExceededError extends Error {
   name = 'MaximumDocumentLengthExceededError';
 }
 
-export class RegistrationDisabledError extends Error {
-  name = 'RegistrationDisabledError';
+export class FeatureDisabledError extends Error {
+  name = 'FeatureDisabledError';
 }