feat: enhance JWT authentication and quick import functionality with logging for better traceability

Co-authored-by: Copilot <copilot@github.com>

backend/src/auth/jwt-auth.guard.ts

@@ -1,15 +1,18 @@
-import { Injectable, ExecutionContext } from '@nestjs/common';
+import { Injectable, CanActivate, ExecutionContext, Logger } from '@nestjs/common';
+import { Observable } from 'rxjs';
 import { Reflector } from '@nestjs/core';
 import { AuthGuard } from '@nestjs/passport';
 import { IS_PUBLIC_KEY } from './decorators/public.decorator';
 
 @Injectable()
 export class JwtAuthGuard extends AuthGuard('jwt') {
+  private readonly logger = new Logger(JwtAuthGuard.name);
+
   constructor(private reflector: Reflector) {
     super();
   }
 
-  canActivate(context: ExecutionContext) {
+  canActivate(context: ExecutionContext): boolean | Promise<boolean> | Observable<boolean> {
     const isPublic = this.reflector.getAllAndOverride<boolean>(IS_PUBLIC_KEY, [
       context.getHandler(),
       context.getClass(),
@@ -17,4 +20,16 @@ export class JwtAuthGuard extends AuthGuard('jwt') {
     if (isPublic) return true;
     return super.canActivate(context);
   }
+
+  // Add logging for user ID in the JWT authentication guard
+  handleRequest(context: ExecutionContext, next: Function) {
+    const request = context.switchToHttp().getRequest();
+    const user = request.user;
+
+    if (user) {
+      this.logger.log(`User ID: ${user.userId}, Username: ${user.username}`);
+    }
+
+    return next();
+  }
 }

backend/src/auth/jwt.strategy.ts

@@ -1,20 +1,21 @@
-import { Injectable } from '@nestjs/common';
+import { Injectable, Logger } from '@nestjs/common';
 import { PassportStrategy } from '@nestjs/passport';
 import { ExtractJwt, Strategy } from 'passport-jwt';
 
 @Injectable()
 export class JwtStrategy extends PassportStrategy(Strategy) {
+  private readonly logger = new Logger(JwtStrategy.name);
+
   constructor() {
-    const secret = process.env.JWT_SECRET;
-    if (!secret) throw new Error('JWT_SECRET saknas i miljövariabler');
     super({
       jwtFromRequest: ExtractJwt.fromAuthHeaderAsBearerToken(),
       ignoreExpiration: false,
-      secretOrKey: secret,
+      secretOrKey: process.env.JWT_SECRET,
     });
   }
 
   async validate(payload: { sub: number; username: string; role: string; isPremium: boolean }) {
+    this.logger.log(`Validating token for user ID: ${payload.sub}, Username: ${payload.username}`);
     return { userId: payload.sub, username: payload.username, role: payload.role ?? 'user', isPremium: payload.isPremium ?? false };
   }
 }