Add JWT authorization

src/main/java/com/faf223/expensetrackerfaf/service/AuthenticationService.java

@@ -0,0 +1,45 @@
+package com.faf223.expensetrackerfaf.service;
+
+import com.faf223.expensetrackerfaf.config.JwtService;
+import com.faf223.expensetrackerfaf.controller.auth.AuthenticationRequest;
+import com.faf223.expensetrackerfaf.controller.auth.AuthenticationResponse;
+import com.faf223.expensetrackerfaf.controller.auth.RegisterRequest;
+import com.faf223.expensetrackerfaf.model.Role;
+import com.faf223.expensetrackerfaf.model.User;
+import com.faf223.expensetrackerfaf.repository.UserRepository;
+import com.faf223.expensetrackerfaf.security.PersonDetails;
+import org.springframework.security.crypto.password.PasswordEncoder;
+import org.springframework.stereotype.Service;
+
+@Service
+public class AuthenticationService {
+
+    private final UserRepository repository;
+    private final PasswordEncoder passwordEncoder;
+    private final JwtService jwtService;
+
+    public AuthenticationService(UserRepository repository, PasswordEncoder passwordEncoder, JwtService jwtService) {
+        this.repository = repository;
+        this.passwordEncoder = passwordEncoder;
+        this.jwtService = jwtService;
+    }
+
+    public AuthenticationResponse authenticate(AuthenticationRequest request) {
+
+    }
+
+    public AuthenticationResponse register(RegisterRequest request) {
+        User user = User.builder()
+                .firstName(request.getFirstName())
+                .lastName(request.getLastName())
+                .email(request.getEmail())
+                .password(passwordEncoder.encode(request.getPassword()))
+                .role(request.getRole())
+                .build();
+        repository.save(user);
+        String jwtToken = jwtService.generateToken(new PersonDetails(user));
+        return AuthenticationResponse.builder()
+                .token(jwtToken)
+                .build();
+    }
+}