SecurityConfig.java

package com.paymybuddy.paymybuddy.config;

import java.io.IOException;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.security.authentication.AuthenticationManager;
import org.springframework.security.authentication.ProviderManager;
import org.springframework.security.authentication.dao.DaoAuthenticationProvider;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.config.annotation.web.configuration.EnableWebSecurity;
import org.springframework.security.core.AuthenticationException;
import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
import org.springframework.security.crypto.password.PasswordEncoder;
import org.springframework.security.web.SecurityFilterChain;
import org.springframework.security.web.authentication.AuthenticationFailureHandler;
import org.springframework.security.web.authentication.SimpleUrlAuthenticationFailureHandler;

import com.paymybuddy.paymybuddy.repository.UserRepository;
import com.paymybuddy.paymybuddy.service.CustomUserDetailsService;

import jakarta.servlet.ServletException;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;
import lombok.extern.slf4j.Slf4j;

@Configuration
@EnableWebSecurity
@Slf4j
public class SecurityConfig {

    UserRepository userRepository;
    
    @Bean
    public PasswordEncoder passwordEncoder() {
        return new BCryptPasswordEncoder();
    }

    @Bean
    public SecurityFilterChain securityFilterChain(HttpSecurity http) throws Exception {
        http
            .authorizeHttpRequests(auth -> auth
                .requestMatchers("/register", "/login", "/css/**", "/js/**").permitAll()
                .requestMatchers("/user/relation", "/profile", "/user/transaction").authenticated()
                .anyRequest().authenticated()
            )
            .formLogin(login -> login
                .loginPage("/login")
                .usernameParameter("email")
                .passwordParameter("password")
                .defaultSuccessUrl("/user/profile", true)
                .failureHandler(authenticationFailureHandler())
                .permitAll()
            )
            .logout(logout -> logout
                .logoutUrl("/logout")
                .logoutSuccessUrl("/login?logout")
                .invalidateHttpSession(true)
                .deleteCookies("JSESSIONID")
                .permitAll()
            );

        return http.build();
    }

    @Bean
    public AuthenticationManager authenticationManager(
                CustomUserDetailsService customUserDetailsService,
                PasswordEncoder passwordEncoder) {

        DaoAuthenticationProvider authProvider = new DaoAuthenticationProvider();
        authProvider.setUserDetailsService(customUserDetailsService);
        authProvider.setPasswordEncoder(passwordEncoder);
        authProvider.setHideUserNotFoundExceptions(false);

        return new ProviderManager(authProvider);
    }

    @Bean
    public AuthenticationFailureHandler authenticationFailureHandler() {
        return new SimpleUrlAuthenticationFailureHandler("/login?error=true") {
            @Override
            public void onAuthenticationFailure(HttpServletRequest httpServletRequest,
                                                HttpServletResponse httpServletResponse,
                                                AuthenticationException exception) throws IOException, ServletException {
                log.info("---- " + exception);

                String errorMessage = "Invalid login attempt";

                httpServletRequest.getSession().setAttribute("errorMessage", errorMessage);

                super.onAuthenticationFailure(httpServletRequest, httpServletResponse, exception);
            }
        };
    }

}