eofster

private func audioBufferListWithObjectID(objectID: AudioObjectID, scope: AudioObjectPropertyScope) throws -> AudioBufferList {
    var address = audioBufferListAddressWithScope(scope)
    var length = try propertyDataSizeWithObjectID(objectID, address: address)
    let bytes = UnsafeMutablePointer<AudioBufferList>.alloc(Int(length))
    defer { bytes.destroy() }
    let status = AudioObjectGetPropertyData(objectID, &address, 0, nil, &length, bytes)
    if status != noErr {
        throw TelephoneError.SystemAudioDevicePropertyDataGetError(systemErrorCode: Int(status))
    }
    return bytes.memory

eofster

class UserAgent {

    let observer: UserAgentObserver

    init(observer: UserAgentObserver) {
        self.observer = observer
    }

    func start() {
        observer.userAgentDidFinishStarting(self)

eofster

class UserAgent {

    let observer: UserAgentObserver

    init(observer: UserAgentObserver) {
        self.observer = observer
    }

    func start() {
        observer.userAgentDidFinishStarting(self)

eofster

protocol PhoneCallRegistry {
    func callWithIdentifier(identifier: Int) -> PhoneCall?
}

func hangUpCallWithIdentifier(identifier: Int) {
    if let call = phoneCallRegistry.callWithIdentifier(identifier) {
        call.hangUp()
    } else {
        print("Could not hang up call")
    }

eofster

protocol PhoneCallRegistry {
    func callWithIdentifier(identifier: Int) -> PhoneCall
}

func hangUpCallWithIdentifier(identifier: Int) {
    phoneCallRegistry.callWithIdentifier(identifier).hangUp()
}

eofster

func hangUpFirstCallOnAccountWithIdentifier(identifier: Int) {
    if let account = accountRegistry.accountWithIdentifier(identifier) {
        if let call = account.firstCall {
            call.hangUp()
        } else {
            print("Could not find first call for an account")
        }
    } else {
        print("Could not find account")
    }

eofster

func hangUpFirstCallOnAccountWithIdentifier(identifier: Int) {
    accountRegistry.accountWithIdentifier(identifier).firstCall.hangUp()
}

eofster

class PhoneCall {

    static let nullPhoneCall: PhoneCall = NullPhoneCall()

    let identifier: Int

    init(identifier: Int) {
        self.identifier = identifier
    }

eofster

protocol PhoneCall {
    var identifier: Int { get }
    var isNil: Bool { get }
    func hangUp()
}

class RealPhoneCall: PhoneCall {

    let identifier: Int
    let isNil = false

eofster

func hangUpFirstCallOnAccountWithIdentifier(identifier: Int) {
    guard let account = accountRegistry.accountWithIdentifier(identifier) else  {
        print("Could not find account")
        return
    }
    guard let call = account.firstCall else {
        print("Could not find first call for an account")
        return
    }
    call.hangUp()