fetch rooms

chat-room/src/app/interface.tsx

+
+export const urlPrefix = 'https://chatroom.zjuxlab.com'
+
+export interface BackendResponse<T> {
+    code: number;
+    message: string;
+    data: T;
+}
+
+export interface Message {
+    messageId: number;  // 消息 id
+    roomId: number;     // 房间 id
+    sender: string;     // 发送人的 username
+    content: string;    // 消息内容
+    time: number;  // 消息发送时间戳
+}
+
+export interface RoomPreviewInfo {
+    roomId: number;
+    roomName: string;
+    lastMessage: Message | null;
+}
+
+export interface RoomAddArgs {
+    user: string;
+    roomName: string;
+}
+
+export interface RoomAddResult {
+    roomId: number;
+}
+
+export interface RoomListRes {
+    rooms: RoomPreviewInfo[];
+}
+
+export interface RoomDeleteArgs {
+    user: string;
+    roomId: number;
+}
+
+export interface MessageAddArgs {
+    roomId: number;
+    content: string;
+    sender: string;
+}

chat-room/src/app/page.tsx

-import Image from "next/image";
+import * as Ty from './interface'
+import RoomListProvider from './room-list';
 
 export default function Home() {
   return (
-    <div className="font-sans grid grid-rows-[20px_1fr_20px] items-center justify-items-center min-h-screen p-8 pb-20 gap-16 sm:p-20">
-      <main className="flex flex-col gap-[32px] row-start-2 items-center sm:items-start">
-        <Image
-          className="dark:invert"
-          src="/next.svg"
-          alt="Next.js logo"
-          width={180}
-          height={38}
-          priority
-        />
-        <ol className="font-mono list-inside list-decimal text-sm/6 text-center sm:text-left">
-          <li className="mb-2 tracking-[-.01em]">
-            Get started by editing{" "}
-            <code className="bg-black/[.05] dark:bg-white/[.06] font-mono font-semibold px-1 py-0.5 rounded">
-              src/app/page.tsx
-            </code>
-            .
-          </li>
-          <li className="tracking-[-.01em]">
-            Save and see your changes instantly.
-          </li>
-        </ol>
-
-        <div className="flex gap-4 items-center flex-col sm:flex-row">
-          <a
-            className="rounded-full border border-solid border-transparent transition-colors flex items-center justify-center bg-foreground text-background gap-2 hover:bg-[#383838] dark:hover:bg-[#ccc] font-medium text-sm sm:text-base h-10 sm:h-12 px-4 sm:px-5 sm:w-auto"
-            href="https://vercel.com/new?utm_source=create-next-app&utm_medium=appdir-template-tw&utm_campaign=create-next-app"
-            target="_blank"
-            rel="noopener noreferrer"
-          >
-            <Image
-              className="dark:invert"
-              src="/vercel.svg"
-              alt="Vercel logomark"
-              width={20}
-              height={20}
-            />
-            Deploy now
-          </a>
-          <a
-            className="rounded-full border border-solid border-black/[.08] dark:border-white/[.145] transition-colors flex items-center justify-center hover:bg-[#f2f2f2] dark:hover:bg-[#1a1a1a] hover:border-transparent font-medium text-sm sm:text-base h-10 sm:h-12 px-4 sm:px-5 w-full sm:w-auto md:w-[158px]"
-            href="https://nextjs.org/docs?utm_source=create-next-app&utm_medium=appdir-template-tw&utm_campaign=create-next-app"
-            target="_blank"
-            rel="noopener noreferrer"
-          >
-            Read our docs
-          </a>
-        </div>
-      </main>
-      <footer className="row-start-3 flex gap-[24px] flex-wrap items-center justify-center">
-        <a
-          className="flex items-center gap-2 hover:underline hover:underline-offset-4"
-          href="https://nextjs.org/learn?utm_source=create-next-app&utm_medium=appdir-template-tw&utm_campaign=create-next-app"
-          target="_blank"
-          rel="noopener noreferrer"
-        >
-          <Image
-            aria-hidden
-            src="/file.svg"
-            alt="File icon"
-            width={16}
-            height={16}
-          />
-          Learn
-        </a>
-        <a
-          className="flex items-center gap-2 hover:underline hover:underline-offset-4"
-          href="https://vercel.com/templates?framework=next.js&utm_source=create-next-app&utm_medium=appdir-template-tw&utm_campaign=create-next-app"
-          target="_blank"
-          rel="noopener noreferrer"
-        >
-          <Image
-            aria-hidden
-            src="/window.svg"
-            alt="Window icon"
-            width={16}
-            height={16}
-          />
-          Examples
-        </a>
-        <a
-          className="flex items-center gap-2 hover:underline hover:underline-offset-4"
-          href="https://nextjs.org?utm_source=create-next-app&utm_medium=appdir-template-tw&utm_campaign=create-next-app"
-          target="_blank"
-          rel="noopener noreferrer"
-        >
-          <Image
-            aria-hidden
-            src="/globe.svg"
-            alt="Globe icon"
-            width={16}
-            height={16}
-          />
-          Go to nextjs.org →
-        </a>
-      </footer>
-    </div>
+    <>
+      <RoomListProvider />
+    </>
   );
 }

chat-room/src/app/room-list.tsx

+'use client'
+import { useState, useEffect } from 'react'
+import * as Ty from './interface'
+
+export default function RoomListProvider() {
+
+    const [roomsLoading, setRoomsLoading] = useState<boolean>(false)
+    const [roomsError, setRoomsError] = useState<string>('')
+    const [rooms, setRooms] = useState<Ty.RoomPreviewInfo[]>([])
+
+
+    /*
+    - url: /api/room/list
+    - method: GET
+    - argument: null
+    - response:
+    interface RoomListRes {
+        rooms: RoomPreviewInfo[];
+    }
+    */
+    const getRooms = async () => {
+        setRoomsLoading(true)
+        setRoomsError('')
+        try {
+        const res = await fetch(Ty.urlPrefix + '/api/room/list', {
+            method: 'GET',
+        });
+        if (!res.ok) {
+            throw new Error('无法获取房间列表，错误码：' + res.status);
+        }
+
+        const data: Ty.BackendResponse<Ty.RoomListRes> = await res.json();
+        
+        setRooms(data.data.rooms);
+
+        } catch (error) {
+        console.error('房间列表获取失败:', error);
+        setRoomsError(error.message);
+        } finally {
+        setRoomsLoading(false);
+        }
+    }
+
+    useEffect(() => {
+        getRooms();
+
+        const interval = setInterval(() => {
+        getRooms();
+        }, 1000); // 1秒
+
+        // 组件卸载时清除定时器
+        return () => {
+        clearInterval(interval)
+        }
+    }, []);
+
+    return (
+      <div className="room-container">
+        <ul>
+          {rooms && rooms.map((room) => (
+                <li key={room.roomId}>
+                <h3>{room.roomName} (ID: {room.roomId})</h3>
+                {room.lastMessage ? (
+                  <p>Last message from {room.lastMessage.sender}: {room.lastMessage.content}</p>
+                ) : (
+                  <p>No messages yet.</p>
+                )}
+              </li>
+            ))
+          }
+        </ul>
+      </div>
+  );
+}
\ No newline at end of file