Blaming USB-Meter/USB Meter/Model/BluetoothManager.swift at 7d6154290676a45e2e7745c0f8963943f173b9d2 · bogdan/USB-Meter

USB-Meter / USB Meter / Model / BluetoothManager.swift

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bogdan Update macOS/Xcode compatibility and Bluetooth discovery

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Initial commit Bogdan Timofte authored 2 weeks ago	1	//
	2	// BTManager.swift
	3	// USB Meter
	4	//
	5	// Created by Bogdan Timofte on 01/03/2020.
	6	// Copyright © 2020 Bogdan Timofte. All rights reserved.
	7	//
	8
	9	import CoreBluetooth
	10
	11	class BluetoothManager : NSObject, ObservableObject {
Update macOS/Xcode compatibi... Bogdan Timofte authored 2 weeks ago	12	private var manager: CBCentralManager?
Initial commit Bogdan Timofte authored 2 weeks ago	13	private var advertisementDataCache = AdvertisementDataCache()
	14	@Published var managerState = CBManagerState.unknown
	15
	16	override init () {
	17	super.init()
	18	}
	19
Update macOS/Xcode compatibi... Bogdan Timofte authored 2 weeks ago	20	func start() {
	21	guard manager == nil else {
	22	return
	23	}
	24	track("Starting Bluetooth manager and requesting authorization if needed")
	25	manager = CBCentralManager(delegate: self, queue: nil)
	26	}
Initial commit Bogdan Timofte authored 2 weeks ago	27
	28	private func scanForMeters() {
Update macOS/Xcode compatibi... Bogdan Timofte authored 2 weeks ago	29	guard let manager else {
	30	track("Scan requested before Bluetooth manager was started")
	31	return
	32	}
Initial commit Bogdan Timofte authored 2 weeks ago	33	guard manager.state == .poweredOn else {
	34	track( "Scan requested but Bluetooth state is \(manager.state)")
	35	return
	36	}
	37	//manager.scanForPeripherals(withServices: allBluetoothRadioServices(), options: [ CBCentralManagerScanOptionAllowDuplicatesKey: true ])
	38	manager.scanForPeripherals(withServices: allBluetoothRadioServices(), options: [ CBCentralManagerScanOptionAllowDuplicatesKey: true ])
	39	}
	40
	41	func discoveredMeter(peripheral: CBPeripheral, advertising advertismentData: [String : Any], rssi RSSI: NSNumber) {
Update macOS/Xcode compatibi... Bogdan Timofte authored 2 weeks ago	42	guard let peripheralName = resolvedPeripheralName(for: peripheral, advertising: advertismentData) else {
	43	return
	44	}
	45	guard let manufacturerData = resolvedManufacturerData(from: advertismentData), manufacturerData.count > 2 else {
	46	return
	47	}
	48
	49	guard let model = ModelByPeriferalName[peripheralName] else {
	50	return
	51	}
	52
	53	let macAddress = MACAddress(from: manufacturerData.suffix(from: 2))
	54
	55	if appData.meters[peripheral.identifier] == nil {
	56	track("adding new USB Meter named '\(peripheralName)' with MAC Address: '\(macAddress)'")
	57	let btSerial = BluetoothSerial(peripheral: peripheral, radio: modelRadios[model] ?? .UNKNOWN, with: macAddress, managedBy: manager!, RSSI: RSSI.intValue)
	58	var m = appData.meters
	59	m[peripheral.identifier] = Meter(model: model, with: btSerial)
	60	appData.meters = m
	61	} else if let meter = appData.meters[peripheral.identifier] {
	62	meter.lastSeen = Date()
	63	meter.btSerial.RSSI = RSSI.intValue
	64	if peripheral.delegate == nil {
	65	peripheral.delegate = meter.btSerial
	66	}
	67	}
	68	}
	69
	70	private func resolvedPeripheralName(for peripheral: CBPeripheral, advertising advertismentData: [String : Any]) -> String? {
	71	let candidates = [
	72	(advertismentData[CBAdvertisementDataLocalNameKey] as? String),
	73	peripheral.name
	74	]
	75
	76	for candidate in candidates {
	77	if let trimmed = candidate?.trimmingCharacters(in: .whitespacesAndNewlines), !trimmed.isEmpty {
	78	return trimmed
Initial commit Bogdan Timofte authored 2 weeks ago	79	}
	80	}
Update macOS/Xcode compatibi... Bogdan Timofte authored 2 weeks ago	81
	82	return nil
	83	}
	84
	85	private func resolvedManufacturerData(from advertismentData: [String : Any]) -> Data? {
	86	if let data = advertismentData[CBAdvertisementDataManufacturerDataKey] as? Data {
	87	return data
Initial commit Bogdan Timofte authored 2 weeks ago	88	}
Update macOS/Xcode compatibi... Bogdan Timofte authored 2 weeks ago	89	if let data = advertismentData["kCBAdvDataManufacturerData"] as? Data {
	90	return data
	91	}
	92	return nil
Initial commit Bogdan Timofte authored 2 weeks ago	93	}
	94	}
	95
	96	extension BluetoothManager : CBCentralManagerDelegate {
	97	// MARK: CBCentralManager state Changed
	98	func centralManagerDidUpdateState(_ central: CBCentralManager) {
	99	managerState = central.state;
	100	track("\(central.state)")
	101
	102	switch central.state {
	103	case .poweredOff:
	104	track("Bluetooth is Off. How should I behave?")
	105	case .poweredOn:
	106	track("Bluetooth is On... Start scanning...")
	107	// note that "didDisconnectPeripheral" won't be called if BLE is turned off while connected
	108	// connectedPeripheral = nil
	109	// pendingPeripheral = nil
	110	DispatchQueue.global(qos: .userInitiated).async { [weak self] in
	111	self?.scanForMeters()
	112	}
	113	case .resetting:
	114	track("Bluetooth is reseting... . Whatever that means.")
	115	case .unauthorized:
	116	track("Bluetooth is not authorized.")
	117	case .unknown:
	118	track("Bluetooth is in an unknown state.")
	119	case .unsupported:
	120	track("Bluetooth not supported by device")
	121	default:
	122	track("Bluetooth is in a state never seen before!")
	123	}
	124	}
	125
	126	// MARK: CBCentralManager didDiscover peripheral
	127	func centralManager(_ central: CBCentralManager, didDiscover peripheral: CBPeripheral, advertisementData: [String : Any], rssi RSSI: NSNumber) {
	128	let completeAdvertisementData = self.advertisementDataCache.append(peripheral: peripheral, advertisementData: advertisementData)
	129	//track("Device discoverded UUID: '\(peripheral.identifier)' named '\(peripheral.name ?? "Unknown")'); RSSI: \(RSSI) dBm; Advertisment data: \(advertisementData)")
	130	discoveredMeter(peripheral: peripheral, advertising: completeAdvertisementData, rssi: RSSI )
	131	}
	132
	133	// MARK: CBCentralManager didConnect peripheral
	134	internal func centralManager(_ central: CBCentralManager, didConnect peripheral: CBPeripheral) {
	135	//track("Connected to peripheral: '\(peripheral.identifier)'")
	136	if let usbMeter = appData.meters[peripheral.identifier] {
	137	usbMeter.btSerial.connectionEstablished()
	138	}
	139	else {
	140	track("Connected to unknown meter with UUID: '\(peripheral.identifier)'")
	141	}
	142	}
	143
	144	// MARK: CBCentralManager didDisconnectPeripheral peripheral
	145	internal func centralManager(_ central: CBCentralManager, didDisconnectPeripheral peripheral: CBPeripheral, error: Error?) {
	146	track("Disconnected from peripheral: '\(peripheral.identifier)' with error: \(error.debugDescription)")
	147	if let usbMeter = appData.meters[peripheral.identifier] {
	148	usbMeter.btSerial.connectionClosed()
	149	}
	150	else {
	151	track("Disconnected from unknown meter with UUID: '\(peripheral.identifier)'")
	152	}
	153	}
	154	}
	155
	156	private class AdvertisementDataCache {
	157
Update macOS/Xcode compatibi... Bogdan Timofte authored 2 weeks ago	158	private var map = [UUID: [String: Any]]()
Initial commit Bogdan Timofte authored 2 weeks ago	159
	160	func append(peripheral: CBPeripheral, advertisementData: [String: Any]) -> [String: Any] {
	161	var ad = (map[peripheral.identifier]) ?? [String: Any]()
Update macOS/Xcode compatibi... Bogdan Timofte authored 2 weeks ago	162	if let localName = peripheral.name?.trimmingCharacters(in: .whitespacesAndNewlines), !localName.isEmpty {
	163	ad[CBAdvertisementDataLocalNameKey] = localName
	164	}
Initial commit Bogdan Timofte authored 2 weeks ago	165	for (key, value) in advertisementData {
	166	ad[key] = value
	167	}
	168	map[peripheral.identifier] = ad
	169	return ad
	170	}
	171
	172	func clear() {
	173	map.removeAll()
	174	}
	175	}