electron app that can connect/disconnect

door-thing-app/.eslintrc.json

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+{
+  "env": {
+    "browser": true,
+    "es6": true,
+    "node": true
+  },
+  "extends": [
+    "eslint:recommended",
+    "plugin:@typescript-eslint/eslint-recommended",
+    "plugin:@typescript-eslint/recommended",
+    "plugin:import/recommended",
+    "plugin:import/electron",
+    "plugin:import/typescript"
+  ],
+  "parser": "@typescript-eslint/parser"
+}

door-thing-app/.gitignore

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+# Logs
+logs
+*.log
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+lerna-debug.log*
+
+# Diagnostic reports (https://nodejs.org/api/report.html)
+report.[0-9]*.[0-9]*.[0-9]*.[0-9]*.json
+
+# Runtime data
+pids
+*.pid
+*.seed
+*.pid.lock
+.DS_Store
+
+# Directory for instrumented libs generated by jscoverage/JSCover
+lib-cov
+
+# Coverage directory used by tools like istanbul
+coverage
+*.lcov
+
+# nyc test coverage
+.nyc_output
+
+# node-waf configuration
+.lock-wscript
+
+# Compiled binary addons (https://nodejs.org/api/addons.html)
+build/Release
+
+# Dependency directories
+node_modules/
+jspm_packages/
+
+# TypeScript v1 declaration files
+typings/
+
+# TypeScript cache
+*.tsbuildinfo
+
+# Optional npm cache directory
+.npm
+
+# Optional eslint cache
+.eslintcache
+
+# Optional REPL history
+.node_repl_history
+
+# Output of 'npm pack'
+*.tgz
+
+# Yarn Integrity file
+.yarn-integrity
+
+# dotenv environment variables file
+.env
+.env.test
+
+# parcel-bundler cache (https://parceljs.org/)
+.cache
+
+# next.js build output
+.next
+
+# nuxt.js build output
+.nuxt
+
+# vuepress build output
+.vuepress/dist
+
+# Serverless directories
+.serverless/
+
+# FuseBox cache
+.fusebox/
+
+# DynamoDB Local files
+.dynamodb/
+
+# Webpack
+.webpack/
+
+# Electron-Forge
+out/
+
+.history

door-thing-app/.prettierrc

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+{
+  "trailingComma": "all",
+  "tabWidth": 2,
+  "endOfLine": "auto"
+}

door-thing-app/package.json

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+{
+  "name": "door-thing-app",
+  "productName": "door-thing-app",
+  "version": "0.0.1",
+  "description": "Door Thing App",
+  "main": ".webpack/main",
+  "scripts": {
+    "start": "electron-forge start",
+    "package": "electron-forge package",
+    "make": "electron-forge make",
+    "publish": "electron-forge publish",
+    "lint": "eslint --ext .ts,.tsx ."
+  },
+  "keywords": [],
+  "author": {
+    "name": "Stepan Usatiuk",
+    "email": "stepanusatiuk@gmail.com"
+  },
+  "license": "MIT",
+  "config": {
+    "forge": {
+      "packagerConfig": {},
+      "makers": [
+        {
+          "name": "@electron-forge/maker-squirrel",
+          "config": {
+            "name": "door_thing_app"
+          }
+        },
+        {
+          "name": "@electron-forge/maker-zip",
+          "platforms": [
+            "darwin"
+          ]
+        },
+        {
+          "name": "@electron-forge/maker-deb",
+          "config": {}
+        },
+        {
+          "name": "@electron-forge/maker-rpm",
+          "config": {}
+        }
+      ],
+      "plugins": [
+        [
+          "@electron-forge/plugin-webpack",
+          {
+            "mainConfig": "./webpack.main.config.js",
+            "renderer": {
+              "config": "./webpack.renderer.config.js",
+              "entryPoints": [
+                {
+                  "html": "./src/index.html",
+                  "js": "./src/renderer.tsx",
+                  "name": "main_window"
+                }
+              ]
+            }
+          }
+        ]
+      ]
+    }
+  },
+  "devDependencies": {
+    "@electron-forge/cli": "^6.0.0-beta.63",
+    "@electron-forge/maker-deb": "^6.0.0-beta.63",
+    "@electron-forge/maker-rpm": "^6.0.0-beta.63",
+    "@electron-forge/maker-squirrel": "^6.0.0-beta.63",
+    "@electron-forge/maker-zip": "^6.0.0-beta.63",
+    "@electron-forge/plugin-webpack": "^6.0.0-beta.63",
+    "@types/web-bluetooth": "^0.0.14",
+    "@typescript-eslint/eslint-plugin": "^5.19.0",
+    "@typescript-eslint/parser": "^5.19.0",
+    "@vercel/webpack-asset-relocator-loader": "^1.7.0",
+    "css-loader": "^6.7.1",
+    "electron": "18.0.4",
+    "eslint": "^8.13.0",
+    "eslint-plugin-import": "^2.26.0",
+    "fork-ts-checker-webpack-plugin": "^6.5.1",
+    "node-loader": "^2.0.0",
+    "preact": "^10.7.1",
+    "style-loader": "^3.3.1",
+    "ts-loader": "^9.2.8",
+    "typescript": "~4.5.4"
+  },
+  "dependencies": {
+    "electron-squirrel-startup": "^1.0.0"
+  }
+}

door-thing-app/src/App.tsx

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+import { useState } from "preact/hooks";
+
+export function App() {
+  const [connecting, setConnecting] = useState(false);
+  const [device, setDevice] = useState<BluetoothDevice>(null);
+
+  const onConnectClick = async () => {
+    try {
+      setConnecting(true);
+      const foundDevice = await navigator.bluetooth.requestDevice({
+        filters: [
+          {
+            namePrefix: "Nano",
+          },
+        ],
+      });
+      console.log("Found device:");
+      console.log(foundDevice);
+      setDevice(foundDevice);
+      await foundDevice.gatt.connect();
+      foundDevice.ongattserverdisconnected = onDisconnect;
+    } catch (error) {
+      console.log("Error connecting:");
+      console.log(error);
+    } finally {
+      setConnecting(false);
+    }
+  };
+
+  const onDisconnect = async () => {
+    setDevice(null);
+  };
+
+  const onDisconnectClick = async () => {
+    try {
+      device.gatt.disconnect();
+    } catch (error) {
+      console.log("Error disconnecting:");
+      console.log(error);
+    }
+  };
+
+  return (
+    <div>
+      {connecting && !device && <span>Trying to connect</span>}
+      {device == null && !connecting && (
+        <button onClick={onConnectClick}>Connect</button>
+      )}
+      {device && (
+        <>
+          <span>connected</span>
+          <button onClick={onDisconnectClick}>Disconnect</button>
+        </>
+      )}
+    </div>
+  );
+}

door-thing-app/src/index.css

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+body {
+  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica,
+    Arial, sans-serif;
+  margin: auto;
+  max-width: 38rem;
+  padding: 2rem;
+}

door-thing-app/src/index.html

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+<!DOCTYPE html>
+<html>
+  <head>
+    <meta charset="UTF-8" />
+    <title>Hello World!</title>
+  </head>
+  <body>
+    <div id="root"></div>
+  </body>
+</html>

door-thing-app/src/index.ts

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+import { app, BrowserWindow } from "electron";
+// This allows TypeScript to pick up the magic constant that's auto-generated by Forge's Webpack
+// plugin that tells the Electron app where to look for the Webpack-bundled app code (depending on
+// whether you're running in development or production).
+declare const MAIN_WINDOW_WEBPACK_ENTRY: string;
+
+// Handle creating/removing shortcuts on Windows when installing/uninstalling.
+if (require("electron-squirrel-startup")) {
+  // eslint-disable-line global-require
+  app.quit();
+}
+
+const createWindow = (): void => {
+  // Create the browser window.
+  const mainWindow = new BrowserWindow({
+    height: 600,
+    width: 800,
+  });
+
+  mainWindow.webContents.on(
+    "select-bluetooth-device",
+    (event, deviceList, callback) => {
+      event.preventDefault();
+      if (deviceList && deviceList.length > 0) {
+        callback(deviceList[0].deviceId);
+      }
+    },
+  );
+
+  // and load the index.html of the app.
+  mainWindow.loadURL(MAIN_WINDOW_WEBPACK_ENTRY);
+
+  // Open the DevTools.
+  mainWindow.webContents.openDevTools();
+};
+
+// This method will be called when Electron has finished
+// initialization and is ready to create browser windows.
+// Some APIs can only be used after this event occurs.
+app.on("ready", createWindow);
+
+// Quit when all windows are closed, except on macOS. There, it's common
+// for applications and their menu bar to stay active until the user quits
+// explicitly with Cmd + Q.
+app.on("window-all-closed", () => {
+  if (process.platform !== "darwin") {
+    app.quit();
+  }
+});
+
+app.on("activate", () => {
+  // On OS X it's common to re-create a window in the app when the
+  // dock icon is clicked and there are no other windows open.
+  if (BrowserWindow.getAllWindows().length === 0) {
+    createWindow();
+  }
+});
+
+// In this file you can include the rest of your app's specific main process
+// code. You can also put them in separate files and import them here.

door-thing-app/src/renderer.tsx

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+/**
+ * This file will automatically be loaded by webpack and run in the "renderer" context.
+ * To learn more about the differences between the "main" and the "renderer" context in
+ * Electron, visit:
+ *
+ * https://electronjs.org/docs/tutorial/application-architecture#main-and-renderer-processes
+ *
+ * By default, Node.js integration in this file is disabled. When enabling Node.js integration
+ * in a renderer process, please be aware of potential security implications. You can read
+ * more about security risks here:
+ *
+ * https://electronjs.org/docs/tutorial/security
+ *
+ * To enable Node.js integration in this file, open up `main.js` and enable the `nodeIntegration`
+ * flag:
+ *
+ * ```
+ *  // Create the browser window.
+ *  mainWindow = new BrowserWindow({
+ *    width: 800,
+ *    height: 600,
+ *    webPreferences: {
+ *      nodeIntegration: true
+ *    }
+ *  });
+ * ```
+ */
+
+import { render } from "preact";
+import { App } from "./App";
+import "./index.css";
+
+console.log(
+  '👋 This message is being logged by "renderer.js", included via webpack',
+);
+
+render(<App />, document.getElementById("root"));

door-thing-app/tsconfig.json

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+{
+  "compilerOptions": {
+    "allowJs": true,
+    "module": "commonjs",
+    "skipLibCheck": true,
+    "esModuleInterop": true,
+    "noImplicitAny": true,
+    "sourceMap": true,
+    "baseUrl": ".",
+    "outDir": "dist",
+    "moduleResolution": "node",
+    "resolveJsonModule": true,
+    "paths": {
+      "*": ["node_modules/*"]
+    },
+    "jsx": "react-jsx",
+    "jsxImportSource": "preact"
+  },
+  "include": ["src/**/*"]
+}

door-thing-app/webpack.main.config.js

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+module.exports = {
+  /**
+   * This is the main entry point for your application, it's the first file
+   * that runs in the main process.
+   */
+  entry: "./src/index.ts",
+  // Put your normal webpack config below here
+  module: {
+    rules: require("./webpack.rules"),
+  },
+  resolve: {
+    extensions: [".js", ".ts", ".jsx", ".tsx", ".css", ".json"],
+  },
+};

door-thing-app/webpack.plugins.js

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+const ForkTsCheckerWebpackPlugin = require("fork-ts-checker-webpack-plugin");
+
+module.exports = [new ForkTsCheckerWebpackPlugin()];

door-thing-app/webpack.renderer.config.js

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+const rules = require("./webpack.rules");
+const plugins = require("./webpack.plugins");
+
+rules.push({
+  test: /\.css$/,
+  use: [{ loader: "style-loader" }, { loader: "css-loader" }],
+});
+
+module.exports = {
+  module: {
+    rules,
+  },
+  plugins: plugins,
+  resolve: {
+    extensions: [".js", ".ts", ".jsx", ".tsx", ".css"],
+  },
+};

door-thing-app/webpack.rules.js

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+module.exports = [
+  // Add support for native node modules
+  {
+    // We're specifying native_modules in the test because the asset relocator loader generates a
+    // "fake" .node file which is really a cjs file.
+    test: /native_modules\/.+\.node$/,
+    use: "node-loader",
+  },
+  {
+    test: /\.(m?js|node)$/,
+    parser: { amd: false },
+    use: {
+      loader: "@vercel/webpack-asset-relocator-loader",
+      options: {
+        outputAssetBase: "native_modules",
+      },
+    },
+  },
+  {
+    test: /\.tsx?$/,
+    exclude: /(node_modules|\.webpack)/,
+    use: {
+      loader: "ts-loader",
+      options: {
+        transpileOnly: true,
+      },
+    },
+  },
+];