Added statistics endpoint

- Added onlineTime statistic
- Added lastLogin tracking and endpoint

src/main/java/de/w665/sharepulse/SharepulseApplication.java

@@ -3,10 +3,15 @@ package de.w665.sharepulse;
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
 
+import java.util.Date;
+
 @SpringBootApplication
 public class SharepulseApplication {
 
+	public static Date startTime;
+
 	public static void main(String[] args) {
+		startTime = new Date();
 		SpringApplication.run(SharepulseApplication.class, args);
 	}
 

src/main/java/de/w665/sharepulse/db/repo/UserRepository.java

@@ -1,7 +1,5 @@
 package de.w665.sharepulse.db.repo;
 
-import com.google.gson.Gson;
-import com.google.gson.GsonBuilder;
 import com.rethinkdb.RethinkDB;
 import com.rethinkdb.net.Connection;
 import de.w665.sharepulse.db.RethinkDBConfig;
@@ -35,6 +33,13 @@ public class UserRepository {
         }
     }
 
+    public void updateLastLoginForUser(String username, Date lastLogin) {
+        r.db(config.getDatabase()).table("users")
+                .filter(r.hashMap("username", username))
+                .update(r.hashMap("lastLogin", lastLogin.getTime()))
+                .run(connection);
+    }
+
     public void insertUser(User user) {
         r.db(config.getDatabase()).table("users").insert(user).run(connection);
     }

src/main/java/de/w665/sharepulse/model/User.java

@@ -1,10 +1,13 @@
 package de.w665.sharepulse.model;
 
+import com.fasterxml.jackson.annotation.JsonFormat;
 import lombok.AllArgsConstructor;
 import lombok.Getter;
 import lombok.NoArgsConstructor;
 import lombok.Setter;
 
+import java.util.Date;
+
 @Getter
 @Setter
 @NoArgsConstructor
@@ -14,4 +17,6 @@ public class User {
     private String password;
     private String email;
     private String role;
+    @JsonFormat(timezone = "ETC")
+    private Date lastLogin;
 }

src/main/java/de/w665/sharepulse/rest/mappings/Administration.java

@@ -0,0 +1,50 @@
+package de.w665.sharepulse.rest.mappings;
+
+import de.w665.sharepulse.SharepulseApplication;
+import de.w665.sharepulse.db.repo.UserRepository;
+import de.w665.sharepulse.model.User;
+import de.w665.sharepulse.rest.SecureApiRestController;
+import de.w665.sharepulse.service.AuthenticationService;
+import jakarta.servlet.http.HttpServletRequest;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Optional;
+
+@Slf4j
+@RestController
+public class Administration extends SecureApiRestController {
+
+    private final UserRepository userRepository;
+    private final AuthenticationService authenticationService;
+
+    public Administration(UserRepository userRepository, AuthenticationService authenticationService) {
+        this.userRepository = userRepository;
+        this.authenticationService = authenticationService;
+    }
+
+    @GetMapping("/statistics")
+    public ResponseEntity<Object> getStatistics(HttpServletRequest request) {
+
+        String token = request.getHeader("Authorization");
+        token = token.substring(7);
+        String username = authenticationService.getClaimValue(token, "username", String.class);
+        Optional<User> optionalUser = userRepository.retrieveUserByUsername(username);
+        if(optionalUser.isEmpty()) {
+            return ResponseEntity.badRequest().body("User not found");
+        }
+        User user = optionalUser.get();
+
+        // If role filtering is required later, add here
+
+        Map<String, Object> response = new HashMap<>();
+        response.put("applicationOnlineTime", System.currentTimeMillis() - SharepulseApplication.startTime.getTime());
+        response.put("lastUserLogin", user.getLastLogin());
+        log.debug("Received statistics request");
+        return ResponseEntity.ok(response);
+    }
+}

src/main/java/de/w665/sharepulse/service/AuthenticationService.java

@@ -46,6 +46,7 @@ public class AuthenticationService {
         }
         Optional<User> user = userRepository.retrieveUserByUsername(username);
         if (user.isPresent() && passwordEncoder.matches(password, user.get().getPassword())) {
+            userRepository.updateLastLoginForUser(user.get().getUsername(), new Date());
             return generateToken(user.get());
         }
         return null;