feat(server): introduce user friendly server errors (#7111)

packages/backend/server/src/core/user/controller.ts

@@ -1,13 +1,7 @@
-import {
-  Controller,
-  ForbiddenException,
-  Get,
-  NotFoundException,
-  Param,
-  Res,
-} from '@nestjs/common';
+import { Controller, Get, Param, Res } from '@nestjs/common';
 import type { Response } from 'express';
 
+import { ActionForbidden, UserAvatarNotFound } from '../../fundamentals';
 import { AvatarStorage } from '../storage';
 
 @Controller('/api/avatars')
@@ -17,7 +11,7 @@ export class UserAvatarController {
   @Get('/:id')
   async getAvatar(@Res() res: Response, @Param('id') id: string) {
     if (this.storage.provider.type !== 'fs') {
-      throw new ForbiddenException(
+      throw new ActionForbidden(
         'Only available when avatar storage provider set to fs.'
       );
     }
@@ -25,7 +19,7 @@ export class UserAvatarController {
     const { body, metadata } = await this.storage.get(id);
 
     if (!body) {
-      throw new NotFoundException(`Avatar ${id} not found.`);
+      throw new UserAvatarNotFound();
     }
 
     // metadata should always exists if body is not null

packages/backend/server/src/core/user/resolver.ts

@@ -1,4 +1,3 @@
-import { BadRequestException } from '@nestjs/common';
 import {
   Args,
   Field,
@@ -18,6 +17,7 @@ import {
   CryptoHelper,
   type FileUpload,
   Throttle,
+  UserNotFound,
 } from '../../fundamentals';
 import { CurrentUser } from '../auth/current-user';
 import { Public } from '../auth/guard';
@@ -92,7 +92,7 @@ export class UserResolver {
     avatar: FileUpload
   ) {
     if (!user) {
-      throw new BadRequestException(`User not found`);
+      throw new UserNotFound();
     }
 
     const avatarUrl = await this.storage.put(
@@ -128,7 +128,7 @@ export class UserResolver {
   })
   async removeAvatar(@CurrentUser() user: CurrentUser) {
     if (!user) {
-      throw new BadRequestException(`User not found`);
+      throw new UserNotFound();
     }
     await this.users.updateUser(user.id, { avatarUrl: null });
     return { success: true };

packages/backend/server/src/core/user/service.ts

@@ -1,8 +1,9 @@
-import { BadRequestException, Injectable, Logger } from '@nestjs/common';
+import { Injectable, Logger } from '@nestjs/common';
 import { Prisma, PrismaClient } from '@prisma/client';
 
 import {
   Config,
+  EmailAlreadyUsed,
   EventEmitter,
   type EventPayload,
   OnEvent,
@@ -63,7 +64,7 @@ export class UserService {
     const user = await this.findUserByEmail(email);
 
     if (user) {
-      throw new BadRequestException('Email already exists');
+      throw new EmailAlreadyUsed();
     }
 
     return this.createUser({