prepair redux

redux/websocketMiddleware.js

@@ -0,0 +1,29 @@
+// /redux/websocketMiddleware.js
+const websocketMiddleware = () => {
+  let socket;
+
+  return ({ dispatch }) =>
+    (next) =>
+    (action) => {
+      if (action.type === "WS_CONNECT") {
+        socket = new WebSocket(action.payload.url);
+
+        socket.onmessage = (event) => {
+          const data = JSON.parse(event.data);
+          dispatch({ type: "WS_MESSAGE_RECEIVED", payload: data });
+        };
+
+        socket.onclose = () => {
+          dispatch({ type: "WS_DISCONNECTED" });
+        };
+      }
+
+      if (action.type === "WS_DISCONNECT" && socket) {
+        socket.close();
+      }
+
+      return next(action);
+    };
+};
+
+export default websocketMiddleware;