Inbox Message & bugs

src/main/java/com/yaoyuan/jiscuss/service/IMessageService.java

@@ -0,0 +1,23 @@
+package com.yaoyuan.jiscuss.service;
+
+import com.yaoyuan.jiscuss.entity.Message;
+
+import java.util.List;
+
+public interface IMessageService {
+
+    /** Send a message from sender to receiver. */
+    Message send(Integer senderId, Integer receiverId, String content);
+
+    /** All messages in a conversation (ordered oldest→newest). */
+    List<Message> getConversation(Integer userId, Integer otherId);
+
+    /** Inbox: latest message per conversation, sorted by latest activity (max 50). */
+    List<Message> getInbox(Integer userId);
+
+    /** Unread message count for a user. */
+    long countUnread(Integer userId);
+
+    /** Mark an entire conversation as read for the current user. */
+    void markConversationRead(Integer userId, Integer otherId);
+}