Works

restservice/src/main/java/com/plannaplan/controllers/TokenBasedController.java

@@ -0,0 +1,29 @@
+package com.plannaplan.controllers;
+
+import java.util.Optional;
+
+import com.plannaplan.entities.User;
+import com.plannaplan.services.UserService;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.security.core.Authentication;
+import org.springframework.security.core.context.SecurityContextHolder;
+import org.springframework.security.authentication.AnonymousAuthenticationToken;
+
+public abstract class TokenBasedController {
+    @Autowired
+    protected UserService userService;
+
+    public TokenBasedController() {
+    }
+
+    protected Optional<User> getCurrentUser() {
+        Authentication authentication = SecurityContextHolder.getContext().getAuthentication();
+
+        if (!(authentication instanceof AnonymousAuthenticationToken)) {
+            return Optional.of(this.userService.getUserByEmail(authentication.getName()));
+        } else {
+            return Optional.empty();
+        }
+    }
+}