Add JWT authorization

src/main/java/com/faf223/expensetrackerfaf/config/ApplicationConfig.java

@@ -0,0 +1,50 @@
+package com.faf223.expensetrackerfaf.config;
+
+import com.faf223.expensetrackerfaf.repository.UserRepository;
+import com.faf223.expensetrackerfaf.security.PersonDetails;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.security.authentication.AuthenticationManager;
+import org.springframework.security.authentication.AuthenticationProvider;
+import org.springframework.security.authentication.dao.DaoAuthenticationProvider;
+import org.springframework.security.config.annotation.authentication.configuration.AuthenticationConfiguration;
+import org.springframework.security.core.userdetails.UserDetailsService;
+import org.springframework.security.core.userdetails.UsernameNotFoundException;
+import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
+import org.springframework.security.crypto.password.PasswordEncoder;
+
+@Configuration
+public class ApplicationConfig {
+
+    private final UserRepository repository;
+
+    @Autowired
+    public ApplicationConfig(UserRepository repository) {
+        this.repository = repository;
+    }
+
+    @Bean
+    public UserDetailsService userDetailsService() {
+        return username -> new PersonDetails(repository.findByEmail(username)
+                .orElseThrow(() -> new UsernameNotFoundException("User not found")));
+    }
+
+    @Bean
+    public AuthenticationProvider authenticationProvider() {
+        DaoAuthenticationProvider authProvider = new DaoAuthenticationProvider();
+        authProvider.setUserDetailsService(userDetailsService());
+        authProvider.setPasswordEncoder(passwordEncoder());
+        return authProvider;
+    }
+
+    @Bean
+    public AuthenticationManager authenticationManager(AuthenticationConfiguration config) throws Exception {
+        return config.getAuthenticationManager();
+    }
+
+    @Bean
+    public PasswordEncoder passwordEncoder() {
+        return new BCryptPasswordEncoder();
+    }
+}