remove webpack and improve performance

capybara.py

@@ -20,7 +20,7 @@ control_message_parser.add_handler("0", {
     "auth_string": "str"
 })
 
-app.static("app", "frontend/dist/", resource_type="dir")
+app.static("app", "frontend/", resource_type="dir")
 
 @app.get("/")
 async def home(req):

frontend/App.js

@@ -1,31 +1,53 @@
-import Banner from "./Banner";
-import Connection from "./Connection";
-import KeyboardController from "./Keyboard";
-import { getAuth, setAuth } from "./LocalConfiguration";
-import LoginPrompt from "./LoginPrompt";
-import TouchpadController from "./Touchpad";
+import Banner from "./Banner.js";
+import connection, { ConnectionEvent } from "./connection.js";
+import KeyboardController from "./Keyboard.js";
+import { setItem } from "./storage.js";
+import LoginPrompt from "./LoginPrompt.js";
+import TouchpadController from "./Touchpad.js";
 
 class App {
-    constructor(mountElement) {
-        this.mountElement = mountElement;
-
-        this.connection = new Connection(`ws://${location.host}/gateway`);
+    constructor() {
+        this.connection = connection;
         this.touchpad = new TouchpadController(this.connection);
         this.keyboard = new KeyboardController(this.connection);
-        this.loginPromptComponent = null;
+        this.bannerComponent = new Banner();
+        this.loginPromptComponent = new LoginPrompt(this.connection);
+        this.connectionHandlers = [];
+    }
 
-        this.connection.connect(getAuth());
-        this.connection.ws.addEventListener("close", ({code}) => {
+    mountOn(mount, keepMountChildren=false) {
+        this.mountElement = mount;
+
+        if (!keepMountChildren) {
+            while (mount.firstChild) {
+                mount.removeChild(mount.lastChild);
+            }
+        }
+
+        this.connectionHandlers.push([ConnectionEvent.Closed, this.connection.subscribe(ConnectionEvent.Closed, (code) => {
             this.unmountApp();
             if (code === 4001) { // 4001 - code for bad auth
                 this.transitionTo("login");
             } else {
                 this.transitionTo("reconnectingBanner");
             }
-        });
-        this.connection.onHandshakeCompleted = () => {
+        })]);
+
+        this.connectionHandlers.push([ConnectionEvent.Ready, this.connection.subscribe(ConnectionEvent.Ready, () => {
             this.transitionTo("app");
-        };
+        })]);
+    }
+
+    unmount() {
+        if (this.mountElement) {
+            this.unmountApp();
+            this.unmountBannerComponent();
+            this.unmountLoginComponent();
+        }
+
+        this.connectionHandlers.forEach(([ event, handler ]) => {
+            this.connection.unsubscribe(event, handler);
+        });
     }
 
     transitionTo(type) {
@@ -51,27 +73,20 @@ class App {
     }
 
     mountBannerComponent(title, text) {
-        if (!this.bannerComponent)
-            this.bannerComponent = new Banner();
-
         this.bannerComponent.mountOn(this.mountElement);
         this.bannerComponent.updateTitle(title);
         this.bannerComponent.updateText(text);
     }
 
     unmountBannerComponent() {
-        if (this.bannerComponent)
-            this.bannerComponent.unmount();
+        this.bannerComponent.unmount();
     }
 
     mountLoginComponent() {
-        if (!this.loginPromptComponent)
-            this.loginPromptComponent = new LoginPrompt(this.connection);
-
         this.loginPromptComponent.mountOn(this.mountElement);
         this.loginPromptComponent.onPasswordSubmitted = (p) => {
-            setAuth(p);
-            this.connection.connect(p);
+            setItem("auth:token", p);
+            this.connection.connect();
         };
     }
 

frontend/Keyboard.js

@@ -38,8 +38,10 @@ class KeyboardController {
                 this.container.removeChild(this.container.lastChild);
             }
 
-            const rowsElement = document.createElement("div");
-            rowsElement.classList.add("Keyboard-rows");
+            const rowsParent = document.createElement("div");
+            rowsParent.classList.add("Keyboard-rows");
+
+            const rowsFragment = document.createDocumentFragment();
 
             for (let row = 0; row < layout.length; row++) {
                 const rowElement = document.createElement("div");
@@ -49,17 +51,18 @@ class KeyboardController {
 
                     const colElement = document.createElement("button");
                     colElement.classList.add("Keyboard-button");
-                    colElement.innerHTML = key;
-                    colElement.addEventListener("click", (event) => {
+                    colElement.innerText = key;
+                    colElement.addEventListener("click", () => {
                         this.handleKeypress(key);
                     });
 
                     rowElement.appendChild(colElement);
                 }
-                rowsElement.appendChild(rowElement);
+                rowsFragment.appendChild(rowElement);
             }
 
-            this.container.appendChild(rowsElement);
+            rowsParent.appendChild(rowsFragment);
+            this.container.appendChild(rowsParent);
         });
     }
 

frontend/LoginPrompt.js

@@ -8,15 +8,10 @@ class LoginPrompt {
             return; // Already mounted
         
         this.element = document.createRange().createContextualFragment(`
-            <div class="Card Card-ui-bottom Card-centered-text">
+            <div class="Card Card-ui-bottom LoginPrompt">
                 <h2>Login</h2>
-                <p>You need to enter the login code before you can start controlling your device.</p>
-                <br>
-                <div class="full-width">
-                    <input type="password" id="code-input" class="input full-width" placeholder="Code">
-                    <br>
-                    <button id="continue-button" class="button-default full-width">Continue</button>
-                </div>
+                <input type="password" id="code-input" class="input full-width" placeholder="Code">
+                <button id="continue-button" class="button-default full-width">Continue</button>
             </div>
         `).children[0];
 

frontend/app.html

@@ -0,0 +1,27 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <meta http-equiv="X-UA-Compatible" content="IE=edge">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=no">
+    <title>Capybara</title>
+
+    <link rel="stylesheet" href="./main.css">
+    <script type="module">
+        import App from "./App.js";
+        import connection from "./connection.js";
+
+        window.__capybara = {};
+
+        window.__capybara.app = new App();
+        window.__capybara.app.mountOn(document.body);
+
+        connection.connect();
+    </script>
+</head>
+<body>
+    <div class="Card Card-ui-bottom Card-centered-text">
+        <h2>Loading...</h2>
+    </div>
+</body>
+</html>

frontend/connection.js

@@ -1,38 +1,45 @@
-import Logger from "./common/Logger";
+import logger from "./logger.js";
+import { getItem } from "./storage.js";
 
-class Connection {
-    constructor(url) {
-        this.ws = null;
-        this.log = Logger(["Connection"], ["log"]).log;
-        this.messageLog = Logger(["Connection", "Message"], ["log"]).log;
-        this.url = url;
-        this.isReady = false;
-        this.reconnectTimeout = 0;
-    }
+export const ConnectionEvent = {
+    Open: 0,
+    Closed: 1,
+    Ready: 2,
+};
+
+export default {
+    ws: null,
+    log: logger(["Connection"], ["log"]).log,
+    messageLog: logger(["Connection", "Message"], ["log"]).log,
+    url: getItem("server:gatewayBase"),
+    isReady: false,
+    reconnectTimeout: 0,
+    handlers: new Map(),
 
     formatAuthString(password) {
         return `%auth%${btoa(password)}`;
-    }
+    },
 
-    connect(password) {
+    connect(password=getItem("auth:token")) {
         this.ws = new WebSocket(this.url);
         this.ws.onerror = (e) => this.log("Error", e);
         this.ws.onopen = () => {
             this.log("Open");
+            this.dispatch(ConnectionEvent.Open, 1);
             this.reconnectTimeout = 0;
             this.log("Sending authentication packet");
             this.ws.send(`0${this.formatAuthString(password)}`); // send auth packet
         };
         this.ws.onmessage = ({ data }) => {
             if (data === "1") {
-                if (this.onHandshakeCompleted)
-                    this.onHandshakeCompleted();
-
                 this.isReady = true;
+                this.dispatch(ConnectionEvent.Ready, 1);
                 this.log("Handshake complete");
             }
         };
         this.ws.onclose = ({ code }) => {
+            this.dispatch(ConnectionEvent.Closed, code);
+
             if (code === 4001) {// code for bad auth
                 this.log("Closed due to bad auth - skipping reconnect");
                 return;
@@ -44,7 +51,7 @@ class Connection {
             this.log(`Closed - will reconnect in ${this.reconnectTimeout}ms`);
             setTimeout(() => this.connect(password), this.reconnectTimeout);
         }
-    }
+    },
 
     sendMessage(code, params=[]) {
         let message = code;
@@ -57,11 +64,38 @@ class Connection {
         }
 
         this.ws.send(message);
-    }
+    },
 
     disconnect() {
         this.ws.close();
-    }
-}
+    },
 
-export default Connection;
+    dispatch(event, data) {
+        const eventHandlers = this.handlers.get(event);
+        if (!eventHandlers)
+            return;
+
+        eventHandlers.forEach(e => e(data));
+    },
+
+    subscribe(event, handler) {
+        if (!this.handlers.get(event)) {
+            this.handlers.set(event, new Set());
+        }
+
+        this.handlers.get(event).add(handler);
+        return handler; // can later be used for unsubscribe()
+    },
+
+    unsubscribe(event, handler) {
+        const eventHandlers = this.handlers.get(event);
+        if (!eventHandlers)
+            return;
+
+        eventHandlers.delete(handler);
+
+        if (eventHandlers.size < 1) {
+            this.handlers.delete(event);
+        }
+    },
+};

frontend/logger.js

@@ -35,7 +35,7 @@ const loggerOfType = (components, type='log') => (...args) => {
     }
 };
 
-function Logger(components, types=['warn', 'error', 'log']) {
+function logger(components, types=['warn', 'error', 'log']) {
     const loggerObj = {};
 
     for (const type of types) {
@@ -50,4 +50,4 @@ export function domLog(message) {
     document.body.appendChild(document.createTextNode(message));
 }
 
-export default Logger;
+export default logger;

frontend/main.css

@@ -108,6 +108,15 @@ body {
     padding: 12px;
 }
 
+/* LoginPrompt */
+
+.LoginPrompt {
+    display: flex;
+    flex-direction: column;
+    align-items: center;
+    justify-content: center;
+}
+
 /* Touchpad */
 
 .Touchpad {

frontend/package.json

@@ -1,19 +0,0 @@
-{
-  "name": "capybara-frontend",
-  "version": "1.0.0",
-  "private": true,
-  "license": "MIT",
-  "scripts": {
-    "watch": "webpack --watch",
-    "build": "webpack"
-  },
-  "devDependencies": {
-    "css-loader": "^6.5.0",
-    "css-minimizer-webpack-plugin": "^3.1.1",
-    "html-webpack-plugin": "^5.5.0",
-    "mini-css-extract-plugin": "^2.4.3",
-    "webpack": "^5.61.0",
-    "webpack-cli": "^4.9.1"
-  },
-  "dependencies": {}
-}

frontend/src/LocalConfiguration.js

@@ -1,7 +0,0 @@
-export function getAuth() {
-    return localStorage.getItem("$auth");
-}
-
-export function setAuth(newValue) {
-    return localStorage.setItem("$auth", newValue);
-}

frontend/src/index.js

@@ -1,4 +0,0 @@
-import "./styles/main.css";
-import App from "./App";
-
-window.__app = new App(document.body);

frontend/storage.js

@@ -0,0 +1,47 @@
+const defaults = {
+    "server:gatewayBase": `${location.protocol === "https:" ? "wss" : "ws"}://${location.host}/gateway`,
+    "auth:token": "",
+};
+const store = new Map(Object.entries(defaults));
+const persistentProvider = localStorage;
+let didCacheProvider = false;
+
+export function setItem(key, value) {
+    store.set(key, value);
+    if (persistentProvider) {
+        persistentProvider.setItem(key, typeof value === "string" ? value : JSON.stringify(value));
+    }
+}
+
+export function getItem(key) {
+    if (!didCacheProvider) {
+        init();
+    }
+    return store.get(key);
+}
+
+export function removeItem(key) {
+    store.delete(key);
+    if (persistentProvider) {
+        persistentProvider.removeItem(key);
+    }
+}
+
+export function init() {
+    if (!persistentProvider)
+        return;
+
+    store.forEach((defaultValue, key) => {
+        const override = persistentProvider.getItem(key);
+        if (override !== null) {
+            try {
+                store.set(key, typeof defaultValue === "string" ? override : JSON.parse(override));
+            } catch (o_O) {
+                console.warn("[Storage]", `init(): An exception was thrown while parsing the value of key "${key}" from persistentProvider. The key "${key}" will be removed from persistentProvider.`, o_O);
+                persistentProvider.removeItem(key);
+            }
+        }
+    });
+
+    didCacheProvider = true;
+}

frontend/webpack.config.js

@@ -1,52 +0,0 @@
-const path = require("path");
-const HtmlWebpackPlugin = require("html-webpack-plugin");
-const MiniCssExtractPlugin = require("mini-css-extract-plugin");
-const CssMinimizerPlugin = require("css-minimizer-webpack-plugin");
-
-module.exports = {
-    mode: "development",
-    entry: './src/index.js',
-    output: {
-        filename: '[name].[contenthash].js',
-        path: path.resolve(__dirname, 'dist'),
-        clean: true
-    },
-    plugins: [
-        new HtmlWebpackPlugin({
-            title: "Capybara",
-            filename: "app.html",
-            meta: {
-                "viewport": "width=device-width,height=device-height,initial-scale=1,minimum-scale=1,user-scalable=no,viewport-fit=contain",
-                "application-name": "Capybara"
-            }
-        }),
-        new MiniCssExtractPlugin({
-            filename: "[name].[contenthash].css"
-        }),
-    ],
-    module: {
-        rules: [
-            {
-                test: /\.css$/i,
-                use: [MiniCssExtractPlugin.loader, "css-loader"],
-            },
-        ],
-    },
-    optimization: {
-        moduleIds: 'deterministic',
-        runtimeChunk: 'single',
-        splitChunks: {
-            cacheGroups: {
-                vendor: {
-                    test: /[\\/]node_modules[\\/]/,
-                    name: 'vendors',
-                    chunks: 'all',
-                },
-            },
-        },
-        minimizer: [
-            `...`,
-            new CssMinimizerPlugin(),
-        ]
-    },
-};