chore: strengthen backend eslint profile

src/modules/auth/application/auth.service.ts

@@ -6,6 +6,7 @@ import {
 import { JwtService } from '@nestjs/jwt';
 import * as bcrypt from 'bcrypt';
 import { createHash, randomUUID } from 'crypto';
+
 import { Session, User } from '../../../../generated/prisma/client';
 import { PrismaService } from '../../../prisma/prisma.service';
 import { AuthUser, RefreshPayload } from './auth.types';
@@ -16,6 +17,7 @@ const REFRESH_TTL_MS = 604_800_000;
 const ACCESS_TTL = '15m';
 const REFRESH_TTL = '7d';
 const DUMMY_PASSWORD_HASH =
+  // eslint-disable-next-line sonarjs/no-hardcoded-passwords -- Public dummy bcrypt hash preserves login timing for nonexistent users; it is not a credential.
   '$2b$12$Z49BwJsyiUqY0ZozFzt9IeYvjhV4kbeLw9KdxOguT5bfhA1RvPCx6';
 
 @Injectable()
@@ -28,12 +30,13 @@ export class AuthService {
   async register(
     email: string,
     password: string,
-  ): Promise<{ user: AuthUser; accessToken: string; refreshToken: string }> {
+  ): Promise<{ accessToken: string; refreshToken: string; user: AuthUser }> {
     const existing = await this.prisma.user.findUnique({
       where: { email },
     });
-    if (existing)
+    if (existing) {
       throw new ConflictException({ code: 'EMAIL_ALREADY_REGISTERED' });
+    }
 
     let user: User;
     try {
@@ -45,8 +48,9 @@ export class AuthService {
         },
       });
     } catch (error) {
-      if (isUniqueConstraintError(error))
+      if (isUniqueConstraintError(error)) {
         throw new ConflictException({ code: 'EMAIL_ALREADY_REGISTERED' });
+      }
       throw error;
     }
     return this.createSession(user);
@@ -55,7 +59,7 @@ export class AuthService {
   async login(
     email: string,
     password: string,
-  ): Promise<{ user: AuthUser; accessToken: string; refreshToken: string }> {
+  ): Promise<{ accessToken: string; refreshToken: string; user: AuthUser }> {
     const user = await this.prisma.user.findUnique({
       where: { email },
     });
@@ -63,14 +67,15 @@ export class AuthService {
       password,
       user?.passwordHash ?? DUMMY_PASSWORD_HASH,
     );
-    if (!user || !valid)
+    if (!user || !valid) {
       throw new UnauthorizedException({ code: 'INVALID_CREDENTIALS' });
+    }
     return this.createSession(user);
   }
 
   async refresh(
     token: string,
-  ): Promise<{ user: AuthUser; accessToken: string; refreshToken: string }> {
+  ): Promise<{ accessToken: string; refreshToken: string; user: AuthUser }> {
     let payload: RefreshPayload;
     try {
       payload = await this.jwt.verifyAsync<RefreshPayload>(token, {
@@ -79,8 +84,9 @@ export class AuthService {
     } catch {
       throw new UnauthorizedException({ code: 'UNAUTHORIZED' });
     }
-    if (payload.type !== 'refresh')
+    if (payload.type !== 'refresh') {
       throw new UnauthorizedException({ code: 'UNAUTHORIZED' });
+    }
     const session = await this.prisma.session.findUnique({
       where: { id: payload.sid },
       include: { user: true },
@@ -91,12 +97,14 @@ export class AuthService {
       session.revokedAt ||
       session.expiresAt <= new Date()
     ) {
-      if (session && !session.revokedAt)
+      if (session && !session.revokedAt) {
         await this.prisma.session.delete({ where: { id: session.id } });
+      }
       throw new UnauthorizedException({ code: 'UNAUTHORIZED' });
     }
-    if (session.refreshTokenHash !== this.hash(token))
+    if (session.refreshTokenHash !== this.hash(token)) {
       throw new UnauthorizedException({ code: 'UNAUTHORIZED' });
+    }
     return this.rotateSession(session, session.refreshTokenHash);
   }
 
@@ -138,7 +146,7 @@ export class AuthService {
 
   private async createSession(
     user: User,
-  ): Promise<{ user: AuthUser; accessToken: string; refreshToken: string }> {
+  ): Promise<{ accessToken: string; refreshToken: string; user: AuthUser }> {
     const session = await this.prisma.session.create({
       data: {
         id: randomUUID(),
@@ -153,7 +161,7 @@ export class AuthService {
   private async rotateSession(
     session: Session & { user: User },
     expectedRefreshTokenHash?: string,
-  ): Promise<{ user: AuthUser; accessToken: string; refreshToken: string }> {
+  ): Promise<{ accessToken: string; refreshToken: string; user: AuthUser }> {
     const refreshToken = await this.jwt.signAsync(
       {
         sub: session.userId,
@@ -172,8 +180,9 @@ export class AuthService {
         where: { id: session.id, refreshTokenHash: expectedRefreshTokenHash },
         data,
       });
-      if (updated.count !== 1)
+      if (updated.count !== 1) {
         throw new UnauthorizedException({ code: 'UNAUTHORIZED' });
+      }
     } else {
       await this.prisma.session.update({ where: { id: session.id }, data });
     }