From 6fe0e6682db1abe8ff6eecc3475f6250dafe7e3d Mon Sep 17 00:00:00 2001
From: Adam Greenwood-Byrne <adam@greenwoodbyrne.com>
Date: Wed, 12 Aug 2020 18:58:10 +0100
Subject: [PATCH] Added simple game controller is Node.JS using Bleno

---
 .../controller/characteristic.js              | 52 ++++++++++++++++++
 part8-breakout-ble/controller/main.js         | 53 +++++++++++++++++++
 2 files changed, 105 insertions(+)
 create mode 100644 part8-breakout-ble/controller/characteristic.js
 create mode 100644 part8-breakout-ble/controller/main.js

diff --git a/part8-breakout-ble/controller/characteristic.js b/part8-breakout-ble/controller/characteristic.js
new file mode 100644
index 0000000..d898536
--- /dev/null
+++ b/part8-breakout-ble/controller/characteristic.js
@@ -0,0 +1,52 @@
+var util = require('util');
+
+var bleno = require('bleno-mac');
+
+var BlenoCharacteristic = bleno.Characteristic;
+
+var EchoCharacteristic = function() {
+  EchoCharacteristic.super_.call(this, {
+    uuid: 'ec0e',
+    properties: ['read', 'write', 'notify'],
+    value: null
+  });
+
+  this._value = new Buffer(0);
+  this._updateValueCallback = null;
+};
+
+util.inherits(EchoCharacteristic, BlenoCharacteristic);
+
+EchoCharacteristic.prototype.onReadRequest = function(offset, callback) {
+  console.log('EchoCharacteristic - onReadRequest: value = ' + this._value.toString('hex'));
+
+  callback(this.RESULT_SUCCESS, this._value);
+};
+
+EchoCharacteristic.prototype.onWriteRequest = function(data, offset, withoutResponse, callback) {
+  this._value = data;
+
+  console.log('EchoCharacteristic - onWriteRequest: value = ' + this._value.toString('hex'));
+
+  if (this._updateValueCallback) {
+    console.log('EchoCharacteristic - onWriteRequest: notifying');
+
+    this._updateValueCallback(this._value);
+  }
+
+  callback(this.RESULT_SUCCESS);
+};
+
+EchoCharacteristic.prototype.onSubscribe = function(maxValueSize, updateValueCallback) {
+  console.log('EchoCharacteristic - onSubscribe');
+
+  this._updateValueCallback = updateValueCallback;
+};
+
+EchoCharacteristic.prototype.onUnsubscribe = function() {
+  console.log('EchoCharacteristic - onUnsubscribe');
+
+  this._updateValueCallback = null;
+};
+
+module.exports = EchoCharacteristic;
diff --git a/part8-breakout-ble/controller/main.js b/part8-breakout-ble/controller/main.js
new file mode 100644
index 0000000..22fa8b9
--- /dev/null
+++ b/part8-breakout-ble/controller/main.js
@@ -0,0 +1,53 @@
+var bleno = require('bleno-mac');
+
+var BlenoPrimaryService = bleno.PrimaryService;
+
+var EchoCharacteristic = require('./characteristic');
+
+console.log('bleno - echo');
+
+var e = new EchoCharacteristic();
+
+bleno.on('stateChange', function(state) {
+  console.log('on -> stateChange: ' + state);
+
+  if (state === 'poweredOn') {
+    bleno.startAdvertising('echo', ['ec00']);
+  } else {
+    bleno.stopAdvertising();
+  }
+});
+
+bleno.on('advertisingStart', function(error) {
+  console.log('on -> advertisingStart: ' + (error ? 'error ' + error : 'success'));
+
+  if (!error) {
+    bleno.setServices([
+      new BlenoPrimaryService({
+        uuid: 'ec00',
+        characteristics: [
+           e
+        ]
+      })
+    ]);
+  }
+});
+
+var ioHook = require('iohook');
+
+var buf = Buffer.allocUnsafe(1);
+var obuf = Buffer.allocUnsafe(1);
+const scrwidth = 1680;
+const divisor = scrwidth / 100;
+
+ioHook.on( 'mousemove', event => {
+   buf.writeUInt8(Math.round(event.x / divisor), 0);
+
+   if (Buffer.compare(buf, obuf)) {
+      e._value = buf;
+      if (e._updateValueCallback) e._updateValueCallback(e._value);
+      buf.copy(obuf);
+   }
+});
+
+ioHook.start();