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RxCBPeripheral.swift
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RxCBPeripheral.swift
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// The MIT License (MIT)
//
// Copyright (c) 2016 Polidea
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.
import Foundation
import CoreBluetooth
class RxCBPeripheral: RxPeripheralType {
let peripheral: CBPeripheral
private let internalDelegate: InternalPeripheralDelegate
init(peripheral: CBPeripheral) {
self.peripheral = peripheral
internalDelegate = RxCBPeripheral.getInternalPeripheralDelegateRef(cbPeripheral: peripheral)
}
deinit {
RxCBPeripheral.putInternalPeripheralDelegateRef(cbPeripheral: peripheral)
}
var identifier: UUID {
return peripheral.value(forKey: "identifier") as! NSUUID as UUID
}
var objectId: UInt {
return UInt(bitPattern: ObjectIdentifier(peripheral))
}
var name: String? {
return peripheral.name
}
var state: CBPeripheralState {
return peripheral.state
}
var services: [RxServiceType]? {
return peripheral.services?.compactMap(RxCBService.init)
}
var canSendWriteWithoutResponse: Bool {
// Although available since iOS 11.0, on versions < iOS 11.2 canSendWriteWithoutResponse will always
// return false (on first try). We work around this issue by always returning true for < iOS 11.2.
// See: https://github.com/Polidea/react-native-ble-plx/issues/365
if #available(iOS 11.2, *) {
return peripheral.canSendWriteWithoutResponse
} else {
return true
}
}
var rx_didUpdateName: Observable<String?> {
return internalDelegate.peripheralDidUpdateNameSubject
}
var rx_didModifyServices: Observable<([RxServiceType])> {
return internalDelegate.peripheralDidModifyServicesSubject
}
var rx_didReadRSSI: Observable<(Int, Error?)> {
return internalDelegate.peripheralDidReadRSSISubject
}
var rx_didDiscoverServices: Observable<([RxServiceType]?, Error?)> {
return internalDelegate.peripheralDidDiscoverServicesSubject
}
var rx_didDiscoverIncludedServicesForService: Observable<(RxServiceType, Error?)> {
return internalDelegate.peripheralDidDiscoverIncludedServicesForServiceSubject
}
var rx_didDiscoverCharacteristicsForService: Observable<(RxServiceType, Error?)> {
return internalDelegate.peripheralDidDiscoverCharacteristicsForServiceSubject
}
var rx_didUpdateValueForCharacteristic: Observable<(RxCharacteristicType, Error?)> {
return internalDelegate.peripheralDidUpdateValueForCharacteristicSubject
}
var rx_didWriteValueForCharacteristic: Observable<(RxCharacteristicType, Error?)> {
return internalDelegate.peripheralDidWriteValueForCharacteristicSubject
}
var rx_didUpdateNotificationStateForCharacteristic: Observable<(RxCharacteristicType, Error?)> {
return internalDelegate.peripheralDidUpdateNotificationStateForCharacteristicSubject
}
var rx_didDiscoverDescriptorsForCharacteristic: Observable<(RxCharacteristicType, Error?)> {
return internalDelegate.peripheralDidDiscoverDescriptorsForCharacteristicSubject
}
var rx_didUpdateValueForDescriptor: Observable<(RxDescriptorType, Error?)> {
return internalDelegate.peripheralDidUpdateValueForDescriptorSubject
}
var rx_didWriteValueForDescriptor: Observable<(RxDescriptorType, Error?)> {
return internalDelegate.peripheralDidWriteValueForDescriptorSubject
}
var rx_isReadyToSendWriteWithoutResponse: Observable<Bool> {
return internalDelegate.peripheralIsReadyToSendWriteWithoutResponseSubject
}
func discoverServices(_ serviceUUIDs: [CBUUID]?) {
RxBluetoothKitLog.d("""
\(peripheral.logDescription) discoverServices(
serviceUUIDs: \(String(describing: serviceUUIDs?.logDescription)))
""")
peripheral.discoverServices(serviceUUIDs)
}
func discoverCharacteristics(_ characteristicUUIDs: [CBUUID]?, for service: RxServiceType) {
let cbService = (service as! RxCBService).service
RxBluetoothKitLog.d("""
\(peripheral.logDescription) discoverCharacteristics(
characteristicUUIDs: \(String(describing: characteristicUUIDs?.logDescription)),
for: \(cbService.logDescription))
""")
peripheral.discoverCharacteristics(characteristicUUIDs, for: cbService)
}
func discoverIncludedServices(_ includedServiceUUIDs: [CBUUID]?, for service: RxServiceType) {
let cbService = (service as! RxCBService).service
RxBluetoothKitLog.d("""
\(peripheral.logDescription) discoverIncludedServices(
includedServiceUUIDs: \(String(describing: includedServiceUUIDs?.logDescription)),
for: \(cbService.logDescription))
""")
peripheral.discoverIncludedServices(includedServiceUUIDs, for: cbService)
}
func readValue(for characteristic: RxCharacteristicType) {
let cbcharacteristic = (characteristic as! RxCBCharacteristic).characteristic
RxBluetoothKitLog.d("""
\(peripheral.logDescription) readValue(
for: \(cbcharacteristic.logDescription))
""")
peripheral.readValue(for: cbcharacteristic)
}
func writeValue(_ data: Data,
for characteristic: RxCharacteristicType,
type: CBCharacteristicWriteType) {
let cbcharacteristic = (characteristic as! RxCBCharacteristic).characteristic
RxBluetoothKitLog.d("""
\(peripheral.logDescription) writeValue(
data: \(data.logDescription),
for: \(cbcharacteristic.logDescription),
type: \(type.logDescription))
""")
peripheral.writeValue(data, for: cbcharacteristic, type: type)
}
func setNotifyValue(_ enabled: Bool, for characteristic: RxCharacteristicType) {
let cbcharacteristic = (characteristic as! RxCBCharacteristic).characteristic
RxBluetoothKitLog.d("""
\(peripheral.logDescription) setNotifyValue(
enabled: \(enabled),
for: \(cbcharacteristic.logDescription))
""")
peripheral.setNotifyValue(enabled, for: cbcharacteristic)
}
func discoverDescriptors(for characteristic: RxCharacteristicType) {
let cbcharacteristic = (characteristic as! RxCBCharacteristic).characteristic
RxBluetoothKitLog.d("""
\(peripheral.logDescription) discoverDescriptors(
for: \(cbcharacteristic.logDescription))
""")
peripheral.discoverDescriptors(for: cbcharacteristic)
}
func readValue(for descriptor: RxDescriptorType) {
let cbdescriptor = (descriptor as! RxCBDescriptor).descriptor
RxBluetoothKitLog.d("""
\(peripheral.logDescription) readValue(
for: \(cbdescriptor.logDescription))
""")
peripheral.readValue(for: cbdescriptor)
}
@available(OSX 10.12, iOS 9.0, *)
func maximumWriteValueLength(for type: CBCharacteristicWriteType) -> Int {
return peripheral.maximumWriteValueLength(for: type)
}
func writeValue(_ data: Data, for descriptor: RxDescriptorType) {
let cbdescriptor = (descriptor as! RxCBDescriptor).descriptor
RxBluetoothKitLog.d("""
\(peripheral.logDescription) writeValue(
data: \(data.logDescription),
for: \(cbdescriptor.logDescription))
""")
peripheral.writeValue(data, for: cbdescriptor)
}
func readRSSI() {
RxBluetoothKitLog.d("\(peripheral.logDescription) readRSSI()")
peripheral.readRSSI()
}
@objc fileprivate class InternalPeripheralDelegate: NSObject, CBPeripheralDelegate {
let peripheralDidUpdateNameSubject = PublishSubject<String?>()
let peripheralDidModifyServicesSubject = PublishSubject<([RxServiceType])>()
let peripheralDidReadRSSISubject = PublishSubject<(Int, Error?)>()
let peripheralDidDiscoverServicesSubject = PublishSubject<([RxServiceType]?, Error?)>()
let peripheralDidDiscoverIncludedServicesForServiceSubject = PublishSubject<(RxServiceType, Error?)>()
let peripheralDidDiscoverCharacteristicsForServiceSubject = PublishSubject<(RxServiceType, Error?)>()
let peripheralDidUpdateValueForCharacteristicSubject = PublishSubject<(RxCharacteristicType, Error?)>()
let peripheralDidWriteValueForCharacteristicSubject = PublishSubject<(RxCharacteristicType, Error?)>()
let peripheralDidUpdateNotificationStateForCharacteristicSubject =
PublishSubject<(RxCharacteristicType, Error?)>()
let peripheralDidDiscoverDescriptorsForCharacteristicSubject =
PublishSubject<(RxCharacteristicType, Error?)>()
let peripheralDidUpdateValueForDescriptorSubject = PublishSubject<(RxDescriptorType, Error?)>()
let peripheralDidWriteValueForDescriptorSubject = PublishSubject<(RxDescriptorType, Error?)>()
let peripheralIsReadyToSendWriteWithoutResponseSubject = PublishSubject<Bool>()
@objc func peripheralDidUpdateName(_ peripheral: CBPeripheral) {
RxBluetoothKitLog.d("""
\(peripheral.logDescription) didUpdateName(name: \(String(describing: peripheral.name)))
""")
peripheralDidUpdateNameSubject.onNext(peripheral.name)
}
@objc func peripheral(_ peripheral: CBPeripheral, didModifyServices invalidatedServices: [CBService]) {
RxBluetoothKitLog.d("""
\(peripheral.logDescription) didModifyServices(services:
[\(invalidatedServices.logDescription))]
""")
peripheralDidModifyServicesSubject.onNext(invalidatedServices.compactMap(RxCBService.init))
}
@objc func peripheral(_ peripheral: CBPeripheral, didReadRSSI rssi: NSNumber, error: Error?) {
RxBluetoothKitLog.d("""
\(peripheral.logDescription) didReadRSSI(rssi: \(rssi),
error: \(String(describing: error)))
""")
peripheralDidReadRSSISubject.onNext((rssi.intValue, error))
}
@objc func peripheral(_ peripheral: CBPeripheral, didDiscoverServices error: Error?) {
RxBluetoothKitLog.d("""
\(peripheral.logDescription) didDiscoverServices(services
: \(String(describing: peripheral.services?.logDescription)),
error: \(String(describing: error)))
""")
peripheralDidDiscoverServicesSubject.onNext((peripheral.services?.compactMap(RxCBService.init), error))
}
@objc func peripheral(_ peripheral: CBPeripheral,
didDiscoverIncludedServicesFor service: CBService,
error: Error?) {
RxBluetoothKitLog.d("""
\(peripheral.logDescription) didDiscoverIncludedServices(for:
\(service.logDescription), includedServices:
\(String(describing: service.includedServices?.logDescription)),
error: \(String(describing: error)))
""")
peripheralDidDiscoverIncludedServicesForServiceSubject.onNext((RxCBService(service: service), error))
}
@objc func peripheral(_ peripheral: CBPeripheral,
didDiscoverCharacteristicsFor service: CBService,
error: Error?) {
RxBluetoothKitLog.d("""
\(peripheral.logDescription) didDiscoverCharacteristicsFor(for:
\(service.logDescription), characteristics:
\(String(describing: service.characteristics?.logDescription)),
error: \(String(describing: error)))
""")
peripheralDidDiscoverCharacteristicsForServiceSubject.onNext((RxCBService(service: service), error))
}
@objc func peripheral(_ peripheral: CBPeripheral,
didUpdateValueFor characteristic: CBCharacteristic,
error: Error?) {
RxBluetoothKitLog.d("""
\(peripheral.logDescription) didUpdateValueFor(for:\(characteristic.logDescription),
value: \(String(describing: characteristic.value?.logDescription)),
error: \(String(describing: error)))
""")
peripheralDidUpdateValueForCharacteristicSubject
.onNext((RxCBCharacteristic(characteristic: characteristic), error))
}
@objc func peripheral(_ peripheral: CBPeripheral,
didWriteValueFor characteristic: CBCharacteristic,
error: Error?) {
RxBluetoothKitLog.d("""
\(peripheral.logDescription) didWriteValueFor(for:\(characteristic.logDescription),
value: \(String(describing: characteristic.value?.logDescription)),
error: \(String(describing: error)))
""")
peripheralDidWriteValueForCharacteristicSubject
.onNext((RxCBCharacteristic(characteristic: characteristic), error))
}
@objc func peripheral(_ peripheral: CBPeripheral,
didUpdateNotificationStateFor characteristic: CBCharacteristic,
error: Error?) {
RxBluetoothKitLog.d("""
\(peripheral.logDescription) didUpdateNotificationStateFor(
for:\(characteristic.logDescription), isNotifying: \(characteristic.isNotifying),
error: \(String(describing: error)))
""")
peripheralDidUpdateNotificationStateForCharacteristicSubject
.onNext((RxCBCharacteristic(characteristic: characteristic), error))
}
@objc func peripheral(_ peripheral: CBPeripheral,
didDiscoverDescriptorsFor characteristic: CBCharacteristic,
error: Error?) {
RxBluetoothKitLog.d("""
\(peripheral.logDescription) didDiscoverDescriptorsFor
(for:\(characteristic.logDescription), descriptors:
\(String(describing: characteristic.descriptors?.logDescription)),
error: \(String(describing: error)))
""")
peripheralDidDiscoverDescriptorsForCharacteristicSubject
.onNext((RxCBCharacteristic(characteristic: characteristic), error))
}
@objc func peripheral(_ peripheral: CBPeripheral,
didUpdateValueFor descriptor: CBDescriptor,
error: Error?) {
RxBluetoothKitLog.d("""
\(peripheral.logDescription) didUpdateValueFor(for:\(descriptor.logDescription),
value: \(String(describing: descriptor.value)), error: \(String(describing: error)))
""")
peripheralDidUpdateValueForDescriptorSubject.onNext((RxCBDescriptor(descriptor: descriptor), error))
}
@objc func peripheral(_ peripheral: CBPeripheral,
didWriteValueFor descriptor: CBDescriptor,
error: Error?) {
RxBluetoothKitLog.d("""
\(peripheral.logDescription) didWriteValueFor(for:\(descriptor.logDescription),
error: \(String(describing: error)))
""")
peripheralDidWriteValueForDescriptorSubject.onNext((RxCBDescriptor(descriptor: descriptor), error))
}
@objc func peripheralIsReady(toSendWriteWithoutResponse peripheral: CBPeripheral) {
//resolve build errors with XCode 11 / iOS 13
let canSendWriteWithoutResponse: Bool
if #available(iOS 11.2, *) {
canSendWriteWithoutResponse = peripheral.canSendWriteWithoutResponse
} else {
canSendWriteWithoutResponse = true
}
RxBluetoothKitLog.d("\(peripheral.logDescription) peripheralIsReady(toSendWriteWithoutResponse:\(canSendWriteWithoutResponse)")
peripheralIsReadyToSendWriteWithoutResponseSubject.onNext(canSendWriteWithoutResponse)
}
}
fileprivate class InternalPeripheralDelegateWrapper {
fileprivate let delegate: InternalPeripheralDelegate
fileprivate var refCount: Int
fileprivate init(delegate: InternalPeripheralDelegate) {
self.delegate = delegate
refCount = 1
}
}
private static let internalPeripheralDelegateWrappersLock = NSLock()
private static var internalPeripheralDelegateWrappers = [CBPeripheral: InternalPeripheralDelegateWrapper]()
private static func getInternalPeripheralDelegateRef(cbPeripheral: CBPeripheral) -> InternalPeripheralDelegate {
internalPeripheralDelegateWrappersLock.lock(); defer { internalPeripheralDelegateWrappersLock.unlock() }
if let wrapper = internalPeripheralDelegateWrappers[cbPeripheral] {
wrapper.refCount += 1
return wrapper.delegate
} else {
let delegate = InternalPeripheralDelegate()
cbPeripheral.delegate = delegate
internalPeripheralDelegateWrappers[cbPeripheral] = InternalPeripheralDelegateWrapper(delegate: delegate)
return delegate
}
}
fileprivate static func putInternalPeripheralDelegateRef(cbPeripheral: CBPeripheral) {
internalPeripheralDelegateWrappersLock.lock(); defer { internalPeripheralDelegateWrappersLock.unlock() }
if let wrapper = internalPeripheralDelegateWrappers[cbPeripheral] {
wrapper.refCount -= 1
if wrapper.refCount == 0 {
cbPeripheral.delegate = nil
internalPeripheralDelegateWrappers[cbPeripheral] = nil
}
} else {
fatalError("Implementation error: internal delegate for CBPeripheral is cached in memory")
}
}
}