Added route to get Current user details.

Author: alwinsimon

src/main/java/com/alwinsimon/UserManagementJavaSpringBoot/Config/ApplicationConfig.java

@@ -8,11 +8,14 @@
 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.context.SecurityContextHolder;
 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;
 
+import java.security.Principal;
+
 @Configuration
 @RequiredArgsConstructor
 public class ApplicationConfig {
@@ -54,4 +57,9 @@ public AuthenticationManager authenticationManager(AuthenticationConfiguration a
 
     }
 
+    @Bean
+    public Principal principal() throws Exception {
+        return () -> SecurityContextHolder.getContext().getAuthentication().getName();
+    }
+
 }

src/main/java/com/alwinsimon/UserManagementJavaSpringBoot/Controller/UserController.java

@@ -1,15 +1,23 @@
 package com.alwinsimon.UserManagementJavaSpringBoot.Controller;
 
-import org.springframework.web.bind.annotation.*;
-//import com.alwinsimon.UserManagementJavaSpringBoot.Model.User;
+import com.alwinsimon.UserManagementJavaSpringBoot.Model.User;
+import com.alwinsimon.UserManagementJavaSpringBoot.Service.UserService;
+import lombok.RequiredArgsConstructor;
+import org.springframework.web.bind.annotation.CrossOrigin;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
 
 @RestController
 @RequestMapping("/api/v1/user")
+@RequiredArgsConstructor
 @CrossOrigin("*")
 public class UserController {
-    @PostMapping("/register")
-    public String addUser(@RequestBody String requestBody){
-        System.out.println("Received request body: " + requestBody);
-        return requestBody;
+
+    private final UserService userService;
+
+    @GetMapping("/current-user")
+    public User getCurrentUser() {
+        return userService.currentUserDetails();
     }
 }

src/main/java/com/alwinsimon/UserManagementJavaSpringBoot/Service/UserService.java

@@ -0,0 +1,21 @@
+package com.alwinsimon.UserManagementJavaSpringBoot.Service;
+
+import com.alwinsimon.UserManagementJavaSpringBoot.Model.User;
+import com.alwinsimon.UserManagementJavaSpringBoot.Repository.UserRepository;
+import lombok.RequiredArgsConstructor;
+import org.springframework.stereotype.Service;
+
+import java.security.Principal;
+
+@Service
+@RequiredArgsConstructor
+public class UserService {
+
+    private final UserRepository userRepository;
+    private final Principal principal;
+
+    public User currentUserDetails() {
+        String email = principal.getName();
+        return userRepository.findByEmail(email).orElse(null);
+    }
+}