Pierre-Darcas-The-github-repo/src/modules/core/auth/jwt.strategy.ts

import { Injectable, UnauthorizedException } from '@nestjs/common';
import { AuthService, JwtPayload } from './auth.service';
import { PassportStrategy } from '@nestjs/passport';
import { ExtractJwt, Strategy } from 'passport-jwt';
import { ConfigService } from '../config/config.service';

@Injectable()
export class JwtStrategy extends PassportStrategy(Strategy) {
  constructor(
    private readonly authService: AuthService,
    private readonly configService: ConfigService,
  ) {
    super({
      jwtFromRequest: ExtractJwt.fromAuthHeaderAsBearerToken(),
      secretOrKey: configService.jwtSecret,
    });
  }

  async validate(payload: JwtPayload) {
    const user = await this.authService.validateUser(payload);
    if (!user) {
      throw new UnauthorizedException();
    }
    return user;
  }
}