From 6779abe64e1ff4c8d018c6c0f093ac62905e94ad Mon Sep 17 00:00:00 2001
From: David Baker <dave@matrix.org>
Date: Wed, 1 Jun 2022 08:55:20 +0100
Subject: [PATCH] Awful hacks to use BLE PTT device via webbluetooth

---
 package.json       |  1 +
 src/room/usePTT.ts | 64 ++++++++++++++++++++++++++++++++++++++++++++++
 vite.config.js     |  3 +++
 yarn.lock          |  5 ++++
 4 files changed, 73 insertions(+)

diff --git a/package.json b/package.json
index fbfcfb24..9e9306bf 100644
--- a/package.json
+++ b/package.json
@@ -55,6 +55,7 @@
     "@matrix-org/olm": "https://gitlab.matrix.org/api/v4/projects/27/packages/npm/@matrix-org/olm/-/@matrix-org/olm-3.2.8.tgz",
     "@storybook/react": "^6.5.0-alpha.5",
     "@types/request": "^2.48.8",
+    "@types/web-bluetooth": "^0.0.14",
     "@typescript-eslint/eslint-plugin": "^5.22.0",
     "@typescript-eslint/parser": "^5.22.0",
     "babel-loader": "^8.2.3",
diff --git a/src/room/usePTT.ts b/src/room/usePTT.ts
index 328ea44d..86b7868e 100644
--- a/src/room/usePTT.ts
+++ b/src/room/usePTT.ts
@@ -60,6 +60,10 @@ export interface PTTState {
   connected: boolean;
 }
 
+let btsetupdone = false;
+let characteristics;
+let globalButtonHeld;
+
 export const usePTT = (
   client: MatrixClient,
   groupCall: GroupCall,
@@ -228,6 +232,64 @@ export const usePTT = (
     [setConnected]
   );
 
+  const onCharatceristicChange = useCallback(async () => {
+    const val = await characteristics[0].value;
+    const strval = new TextDecoder("utf-8").decode(val);
+
+    if (globalButtonHeld && strval.startsWith("+PTT=R")) {
+      stopTalking();
+    } else if (!globalButtonHeld && strval.startsWith("+PTT=P")) {
+      startTalking();
+    }
+
+    //setTimeout(async () => {
+    //console.log(e);
+    //return;
+
+    //onCharatceristicChange();
+    //}, 200);
+  }, [startTalking, stopTalking]);
+
+  useEffect(() => {
+    if (btsetupdone) return;
+    btsetupdone = true;
+    async function doBluetooth() {
+      try {
+        const device = await navigator.bluetooth.requestDevice({
+          //filters: [{ services: ["00006666-0000-1000-8000-00805f9b34fb"] }],
+          filters: [{ services: [0x6666] }],
+          //optionalServices: [0x6666],
+          //acceptAllDevices: true,
+        });
+        console.log(device);
+        console.log("connecting ble");
+        const connectedServer = await device.gatt.connect();
+        console.log("connected", connectedServer);
+        const service = await connectedServer.getPrimaryService(
+          //"00006666-0000-1000-8000-00805f9b34fb"
+          0x6666
+        );
+        console.log(service);
+        characteristics = await service.getCharacteristics();
+        console.log("characteristics: ", characteristics);
+
+        //let readProm = Promise.resolve();
+
+        console.log("starting notifs");
+        await characteristics[0].startNotifications();
+        characteristics[0].oncharacteristicvaluechanged =
+          onCharatceristicChange;
+        console.log("listener added");
+
+        //setInterval(onCharatceristicChange, 5000);
+        //onCharatceristicChange();
+      } catch (e) {
+        console.log("error setting up ble ptt", e);
+      }
+    }
+    doBluetooth();
+  }, [pttButtonHeld, startTalking, stopTalking, onCharatceristicChange]);
+
   useEffect(() => {
     function onKeyDown(event: KeyboardEvent): void {
       if (event.code === "Space") {
@@ -292,6 +354,8 @@ export const usePTT = (
     }));
   }, []);
 
+  globalButtonHeld = pttButtonHeld;
+
   return {
     pttButtonHeld,
     isAdmin,
diff --git a/vite.config.js b/vite.config.js
index 95f6c3df..3d918b13 100644
--- a/vite.config.js
+++ b/vite.config.js
@@ -39,6 +39,9 @@ export default defineConfig(({ mode }) => {
       proxy: {
         "/_matrix": env.VITE_DEFAULT_HOMESERVER || "http://localhost:8008",
       },
+      hmr: {
+        clientPort: 443,
+      },
     },
     resolve: {
       dedupe: [
diff --git a/yarn.lock b/yarn.lock
index 74d88f48..bc7cf6e7 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -3046,6 +3046,11 @@
   resolved "https://registry.yarnpkg.com/@types/unist/-/unist-2.0.6.tgz#250a7b16c3b91f672a24552ec64678eeb1d3a08d"
   integrity sha512-PBjIUxZHOuj0R15/xuwJYjFi+KZdNFrehocChv4g5hu6aFroHue8m0lBP0POdK2nKzbw0cgV1mws8+V/JAcEkQ==
 
+"@types/web-bluetooth@^0.0.14":
+  version "0.0.14"
+  resolved "https://registry.yarnpkg.com/@types/web-bluetooth/-/web-bluetooth-0.0.14.tgz#94e175b53623384bff1f354cdb3197a8d63cdbe5"
+  integrity sha512-5d2RhCard1nQUC3aHcq/gHzWYO6K0WJmAbjO7mQJgCQKtZpgXxv1rOM6O/dBDhDYYVutk1sciOgNSe+5YyfM8A==
+
 "@types/webpack-env@^1.16.0":
   version "1.16.3"
   resolved "https://registry.yarnpkg.com/@types/webpack-env/-/webpack-env-1.16.3.tgz#b776327a73e561b71e7881d0cd6d34a1424db86a"