useXxxReducer

webapp/src/App.js

@@ -1,31 +1,34 @@
 import './App.css';
-import React, { useReducer } from 'react'
-import { BrowserRouter, Routes, Route } from "react-router-dom"
+import React from 'react';
+import { BrowserRouter, Routes, Route } from "react-router-dom";
 
 import Header from "./container/Header"
 import Leaderboard from "./container/Leaderboard"
 import Game from "./components/Game"
 import About from "./components/About"
 
-import Polling from './flux/polling';
-import User from './flux/user';
+import usePollingReducer from './reducer/polling';
+import useUserReducer from './reducer/user';
+import useLeaderboardReducer from './reducer/leaderboard';
+
 import useLeaderboardApi from './api/leaderboard';
 import useUserApi from './api/user';
 
 function App() {
-  const pollingFlux = useReducer(Polling.reducer, Polling.initialState);
-  const userFlux = useReducer(User.reducer, User.initialState);
+  const pollingReducer = usePollingReducer();
+  const userReducer = useUserReducer();
+  const leaderboardReducer = useLeaderboardReducer();
   
-  const leaderboardApi = useLeaderboardApi(pollingFlux);
-  const userApi = useUserApi(userFlux);
+  const leaderboardApi = useLeaderboardApi(leaderboardReducer);
+  const userApi = useUserApi(userReducer);
   
-  const leaderboard = leaderboardApi.get();
+  const leaderboard = leaderboardApi.get(pollingReducer);
   const user = userApi.get();
 
   return (
     <div className="App" >
       <BrowserRouter>
-        <Header pollingFlux={pollingFlux} />
+        <Header pollingReducer={pollingReducer} />
         <Routes>
           {/* https://stackoverflow.com/questions/40541994/multiple-path-names-for-a-same-component-in-react-router */}
           <Route path="/game" element={<Game />} />

webapp/src/api/leaderboard.js

@@ -2,19 +2,26 @@ import usePolling from "../util/Polling"
 
 const uri = '/api/leaderboard';
 
-export default function useLeaderboardApi([polling, dispatchPolling]) {
+export default function useLeaderboardApi(leaderboardReducer) {
+    const [leaderboard, dispatchLeaderboaed] = leaderboardReducer;
+
+    const useGet = (pollingReducer) => {
+        const [polling, dispatchPolling] = pollingReducer;
 
-    const useGet = () => {
         const mode = (polling.enabled === true)
             ? { interval_sec: 300 }     // update leaderbord stats every 5 min
             : { interval_stop: true }   // user has fliped OfflineToggel
 
-        const [leaderboard, isFetching] = usePolling(uri, mode);
+        const [table, isFetching] = usePolling(uri, mode);
 
         if (polling.leaderboard !== isFetching) {
             dispatchPolling({ type: 'next', leaderboard: isFetching });
         }
 
+        if (leaderboard.table !== table) {
+            dispatchLeaderboaed({ type: 'next', table });
+        }
+
         return leaderboard;
     }
 

webapp/src/container/Header.jsx

@@ -4,8 +4,8 @@ import { NavLink } from "react-router-dom";
 import OnlineToggle from '../components/OnlineToggle';
 import Wobler from '../components/Wobler';
 
-export default function Header({ pollingFlux }) {
-  const [polling, dispatchPolling] = pollingFlux;
+export default function Header({ pollingReducer }) {
+  const [polling, dispatchPolling] = pollingReducer;
 
   return (
     <div className='Header'>

webapp/src/container/Leaderboard.jsx

@@ -4,14 +4,15 @@ import Loading from '../components/Loading';
 
 export default function Leaderboard({ leaderboard, user }) {
 
-  if (leaderboard == null)
+  const table = leaderboard?.table;
+  if (!table)
     return <Loading />
 
   const isCurrentUser = (playerName) =>
-    user.isCurrentUser(playerName) === true ? true : null;
+    user?.isCurrentUser(playerName) === true ? true : null;
 
-  const tableRows = Object.keys(leaderboard).map(playerName => {
-    var rank = leaderboard[playerName];
+  const tableRows = Object.keys(table).map(playerName => {
+    var rank = table[playerName];
 
     return <tr key={playerName} className={isCurrentUser(playerName) && 'currentuser'}>
       <td>{playerName}</td>

webapp/src/flux/user.js

@@ -1,28 +0,0 @@
-import { localeCompare } from '../util/Locale'
-import StateHelper from '../util/StateHelper';
-
-export const userInitialState = {
-  username: '',
-  isCurrentUser: function (otherUsername) {
-    return localeCompare(this.username, otherUsername)
-  },
-
-};
-
-export function userReducer(state, action) {
-  switch (action.type) {
-
-    case 'next': 
-      return StateHelper.next(state, action);
-
-    default:
-      throw Error('Unknown action.type: ' + action.type);
-  }
-}
-
-const User = {
-  reducer: userReducer,
-  initialState: userInitialState
-};
-
-export default User;

webapp/src/reducer/leaderboard.js

@@ -0,0 +1,21 @@
+import { useReducer } from 'react';
+import { nextState } from '../util/StateHelper';
+
+export const leaderboardInitialState = {
+  table: null,
+};
+
+export function leaderboardReducer(state, action) {
+  switch (action.type) {
+
+    case 'next': 
+      return nextState(state, action);
+
+    default:
+      throw Error('LeaderboardReducer: Unknown action.type', action.type);
+  }
+}
+
+export default function useLeaderboardReducer() {
+  return useReducer(leaderboardReducer, leaderboardInitialState);
+}

webapp/src/reducer/polling.js

@@ -1,4 +1,5 @@
-import { useLocalStorage } from '../util/PersistentStorage'
+import { useReducer } from 'react';
+import { useLocalStorage } from '../util/PersistentStorage';
 import { nextState } from '../util/StateHelper';
 
 const Persistent = (() => {
@@ -33,9 +34,6 @@ export function pollingReducer(curntState, action) {
   }
 }
 
-const Polling = { 
-  reducer: pollingReducer, 
-  initialState: pollingInitialState 
-};
-
-export default Polling
+export default function usePollingReducer() {
+  return useReducer(pollingReducer, pollingInitialState);
+}

webapp/src/reducer/user.js

@@ -0,0 +1,26 @@
+import { useReducer } from 'react';
+import { localeCompare } from '../util/Locale';
+import { nextState } from '../util/StateHelper';
+
+export const userInitialState = {
+  username: '',
+
+  isCurrentUser: function (otherUsername) {
+    return localeCompare(this.username, otherUsername)
+  }
+};
+
+export function userReducer(state, action) {
+  switch (action.type) {
+
+    case 'next': 
+      return nextState(state, action);
+
+    default:
+      throw Error('Unknown action.type', action.type);
+  }
+}
+
+export default function useUserReducer() {
+  return useReducer(userReducer, userInitialState);
+}

webapp/src/util/Polling.js

@@ -47,7 +47,7 @@ export default function usePolling(url, mode) {
     }, [url, mode, isFetching, cache, fetchData, delayID]);
 
     return [
-        cache, // API response
+        cache, // API responce
         isFetching  // true / false
     ]
 }