using SSE instead of socket IO

packages/api/src/utility/socket.js

@@ -1,19 +1,35 @@
-let socket = null;
+let res = null;
+let init = '';
 
 module.exports = {
   set(value) {
-    socket = value;
-  },
-  get() {
-    return socket;
+    res = value;
   },
+  // get() {
+  //   return socket;
+  // },
   emit(message, data) {
+    if (res) {
+      if (init) {
+        res.write(init);
+        init = '';
+      }
+      res.write(`event: ${message}\ndata: ${JSON.stringify(data == null ? null : data)}\n\n`);
+    } else {
+      init += res;
+    }
+
     // console.log('EMIT:', message, data);
-    socket.emit(message, data);
+    // socket.emit(message, data);
   },
   emitChanged(key) {
+    this.emit('clean-cache', key);
+    this.emit(key);
     // console.log('EMIT_CHANGED:', key);
-    socket.emit('clean-cache', key);
-    socket.emit(key);
+    // socket.emit('clean-cache', key);
+    // socket.emit(key);
+
+    // socket.send(key, 'clean-cache');
+    // socket.send(null, key);
   },
 };