feat: add subscribe

src/app.ts

@@ -1,21 +1,82 @@
 import { App } from '@abearxiong/router';
 import { useConfig } from '@abearxiong/use-config';
 import { dynamicImport } from './lib/dynamic-import.ts';
-import { redisPublisher } from './modules/redis.ts';
+import { redisPublisher, redisSubscriber } from './modules/redis.ts';
 
 useConfig();
-export const emit = (channel: string, message: string) => {
-  redisPublisher.publish(channel, message);
+export const emit = (channel: string, message?: any) => {
+  redisPublisher.publish(channel, JSON.stringify(message));
 };
 
-export const app = new App<{ import: any, emit: typeof emit }>({
+export const app = new App<{ import: any; emit: typeof emit }>({
   serverOptions: {
     cors: {
       origin: '*',
     },
   },
+  io: true,
   routerContext: {
     import: dynamicImport,
     emit,
   },
 });
+
+const clients = [];
+// 订阅频道 pageEdit， container 单个页面预览 container 整个页面预览
+type ClientData = {
+  cid?: string; // container id
+  pid?: string[]; // page id
+  cids?: string[]; // container id
+  type: 'page' | 'container' | 'flow';
+};
+type MessageData = {
+  source: 'container';
+  data: any;
+  operation?: 'edit';
+};
+redisSubscriber.subscribe('pageEdit', () => {
+  console.log('Subscribed to Redis data-updates channel');
+});
+redisSubscriber.on('message', (channel, message) => {
+  if (channel !== 'pageEdit') return;
+  const m = JSON.parse(message) as MessageData;
+  clients.forEach((client) => {
+    const data = client.data as any;
+    const { cid, cids = [] } = data || {};
+    const wrapper = (data: any) => {
+      const res = {
+        type: 'pageEdit',
+        source: 'container',
+        data,
+      };
+      return JSON.stringify(res);
+    };
+    const { source, data: mData } = m; // 拆包
+    if (source === 'container') {
+      if (cid === mData?.id) {
+        client.ws.send(wrapper(mData));
+      } else if (cids.includes(mData?.id)) {
+        client.ws.send(wrapper(mData));
+      }
+    }
+    // 其他操作 暂时 不处理
+    // TODO
+  });
+});
+app.io.addListener('subscribe', async ({ data, end, ws }) => {
+  const { type } = data || {};
+  if (type === 'pageEdit') {
+    clients.push({ ws, data: data.data }); // 拆包，里面包含的type信息，去掉
+    end({ code: 200, data: 'subscribe success' });
+  } else if (type === 'unsubscribe') {
+    const index = clients.findIndex((client) => client.ws === ws);
+    clients.splice(index, 1);
+    end({ code: 200, data: 'unsubscribe success' });
+  } else {
+    end({ code: 404, data: 'subscribe fail' });
+  }
+  ws.on('close', () => {
+    const index = clients.findIndex((client) => client.ws === ws);
+    clients.splice(index, 1);
+  });
+});