Initial commit

backend/src/main/java/com/smartoffice/common/ApiResponse.java

@@ -0,0 +1,48 @@
+package com.smartoffice.common;
+
+import java.time.Instant;
+
+public class ApiResponse<T> {
+    private int code;
+    private String message;
+    private T data;
+    private Instant timestamp;
+
+    public ApiResponse() {
+    }
+
+    public ApiResponse(int code, String message, T data) {
+        this.code = code;
+        this.message = message;
+        this.data = data;
+        this.timestamp = Instant.now();
+    }
+
+    public static <T> ApiResponse<T> ok(T data) {
+        return new ApiResponse<>(200, "OK", data);
+    }
+
+    public static <T> ApiResponse<T> created(T data) {
+        return new ApiResponse<>(201, "Created", data);
+    }
+
+    public static ApiResponse<Void> error(int code, String message) {
+        return new ApiResponse<>(code, message, null);
+    }
+
+    public int getCode() {
+        return code;
+    }
+
+    public String getMessage() {
+        return message;
+    }
+
+    public T getData() {
+        return data;
+    }
+
+    public Instant getTimestamp() {
+        return timestamp;
+    }
+}