370 lines
13 KiB
Swift
370 lines
13 KiB
Swift
//
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// Copyright (c) 2017 Open Whisper Systems. All rights reserved.
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//
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import Foundation
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import UIKit
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import CallKit
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import AVFoundation
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import SignalServiceKit
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/**
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* Connects user interface to the CallService using CallKit.
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*
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* User interface is routed to the CallManager which requests CXCallActions, and if the CXProvider accepts them,
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* their corresponding consequences are implmented in the CXProviderDelegate methods, e.g. using the CallService
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*/
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@available(iOS 10.0, *)
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final class CallKitCallUIAdaptee: NSObject, CallUIAdaptee, CXProviderDelegate {
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let TAG = "[CallKitCallUIAdaptee]"
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private let callManager: CallKitCallManager
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internal let callService: CallService
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internal let notificationsAdapter: CallNotificationsAdapter
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internal let contactsManager: OWSContactsManager
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private let provider: CXProvider
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// CallKit handles incoming ringer stop/start for us. Yay!
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let hasManualRinger = false
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// The app's provider configuration, representing its CallKit capabilities
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static var providerConfiguration: CXProviderConfiguration {
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let localizedName = NSLocalizedString("APPLICATION_NAME", comment: "Name of application")
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let providerConfiguration = CXProviderConfiguration(localizedName: localizedName)
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providerConfiguration.supportsVideo = true
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providerConfiguration.maximumCallGroups = 1
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providerConfiguration.maximumCallsPerCallGroup = 1
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providerConfiguration.supportedHandleTypes = [.phoneNumber, .generic]
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let iconMaskImage = #imageLiteral(resourceName: "logoSignal")
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providerConfiguration.iconTemplateImageData = UIImagePNGRepresentation(iconMaskImage)
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providerConfiguration.ringtoneSound = "r.caf"
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return providerConfiguration
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}
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init(callService: CallService, contactsManager: OWSContactsManager, notificationsAdapter: CallNotificationsAdapter) {
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AssertIsOnMainThread()
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Logger.debug("\(self.TAG) \(#function)")
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self.callManager = CallKitCallManager()
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self.callService = callService
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self.contactsManager = contactsManager
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self.notificationsAdapter = notificationsAdapter
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self.provider = CXProvider(configuration: type(of: self).providerConfiguration)
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super.init()
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self.provider.setDelegate(self, queue: nil)
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}
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// MARK: CallUIAdaptee
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func startOutgoingCall(handle: String) -> SignalCall {
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AssertIsOnMainThread()
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Logger.info("\(self.TAG) \(#function)")
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let call = SignalCall.outgoingCall(localId: UUID(), remotePhoneNumber: handle)
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// Add the new outgoing call to the app's list of calls.
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// So we can find it in the provider delegate callbacks.
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callManager.addCall(call)
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callManager.startCall(call)
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return call
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}
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// Called from CallService after call has ended to clean up any remaining CallKit call state.
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func failCall(_ call: SignalCall, error: CallError) {
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AssertIsOnMainThread()
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Logger.info("\(self.TAG) \(#function)")
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switch error {
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case .timeout(description: _):
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provider.reportCall(with: call.localId, endedAt: Date(), reason: CXCallEndedReason.unanswered)
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default:
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provider.reportCall(with: call.localId, endedAt: Date(), reason: CXCallEndedReason.failed)
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}
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self.callManager.removeCall(call)
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}
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func reportIncomingCall(_ call: SignalCall, callerName: String) {
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AssertIsOnMainThread()
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Logger.info("\(self.TAG) \(#function)")
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// Construct a CXCallUpdate describing the incoming call, including the caller.
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let update = CXCallUpdate()
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if Environment.getCurrent().preferences.isCallKitPrivacyEnabled() {
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let callKitId = CallKitCallManager.kAnonymousCallHandlePrefix + call.localId.uuidString
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update.remoteHandle = CXHandle(type: .generic, value: callKitId)
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TSStorageManager.shared().setPhoneNumber(call.remotePhoneNumber, forCallKitId:callKitId)
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update.localizedCallerName = NSLocalizedString("CALLKIT_ANONYMOUS_CONTACT_NAME", comment: "The generic name used for calls if CallKit privacy is enabled")
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} else {
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update.localizedCallerName = self.contactsManager.stringForConversationTitle(withPhoneIdentifier: call.remotePhoneNumber)
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update.remoteHandle = CXHandle(type: .phoneNumber, value: call.remotePhoneNumber)
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}
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update.hasVideo = call.hasLocalVideo
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disableUnsupportedFeatures(callUpdate: update)
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// Report the incoming call to the system
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provider.reportNewIncomingCall(with: call.localId, update: update) { error in
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/*
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Only add incoming call to the app's list of calls if the call was allowed (i.e. there was no error)
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since calls may be "denied" for various legitimate reasons. See CXErrorCodeIncomingCallError.
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*/
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guard error == nil else {
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Logger.error("\(self.TAG) failed to report new incoming call")
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return
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}
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self.callManager.addCall(call)
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}
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}
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func answerCall(localId: UUID) {
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AssertIsOnMainThread()
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Logger.info("\(self.TAG) \(#function)")
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owsFail("\(self.TAG) \(#function) CallKit should answer calls via system call screen, not via notifications.")
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}
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func answerCall(_ call: SignalCall) {
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AssertIsOnMainThread()
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Logger.info("\(self.TAG) \(#function)")
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callManager.answer(call: call)
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}
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func declineCall(localId: UUID) {
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AssertIsOnMainThread()
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owsFail("\(self.TAG) \(#function) CallKit should decline calls via system call screen, not via notifications.")
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}
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func declineCall(_ call: SignalCall) {
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AssertIsOnMainThread()
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Logger.info("\(self.TAG) \(#function)")
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callManager.localHangup(call: call)
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}
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func recipientAcceptedCall(_ call: SignalCall) {
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AssertIsOnMainThread()
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Logger.info("\(self.TAG) \(#function)")
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self.provider.reportOutgoingCall(with: call.localId, connectedAt: nil)
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let update = CXCallUpdate()
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disableUnsupportedFeatures(callUpdate: update)
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provider.reportCall(with: call.localId, updated: update)
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}
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func localHangupCall(_ call: SignalCall) {
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AssertIsOnMainThread()
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Logger.info("\(self.TAG) \(#function)")
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callManager.localHangup(call: call)
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}
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func remoteDidHangupCall(_ call: SignalCall) {
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AssertIsOnMainThread()
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Logger.info("\(self.TAG) \(#function)")
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provider.reportCall(with: call.localId, endedAt: nil, reason: CXCallEndedReason.remoteEnded)
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}
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func remoteBusy(_ call: SignalCall) {
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AssertIsOnMainThread()
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Logger.info("\(self.TAG) \(#function)")
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provider.reportCall(with: call.localId, endedAt: nil, reason: CXCallEndedReason.unanswered)
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}
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func setIsMuted(call: SignalCall, isMuted: Bool) {
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AssertIsOnMainThread()
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Logger.info("\(self.TAG) \(#function)")
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callManager.setIsMuted(call: call, isMuted: isMuted)
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}
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func setHasLocalVideo(call: SignalCall, hasLocalVideo: Bool) {
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AssertIsOnMainThread()
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Logger.debug("\(self.TAG) \(#function)")
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let update = CXCallUpdate()
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update.hasVideo = hasLocalVideo
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// Update the CallKit UI.
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provider.reportCall(with: call.localId, updated: update)
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self.callService.setHasLocalVideo(hasLocalVideo: hasLocalVideo)
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}
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// MARK: CXProviderDelegate
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func providerDidReset(_ provider: CXProvider) {
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AssertIsOnMainThread()
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Logger.info("\(self.TAG) \(#function)")
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// End any ongoing calls if the provider resets, and remove them from the app's list of calls,
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// since they are no longer valid.
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callService.handleFailedCurrentCall(error: .providerReset)
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// Remove all calls from the app's list of calls.
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callManager.removeAllCalls()
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}
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func provider(_ provider: CXProvider, perform action: CXStartCallAction) {
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AssertIsOnMainThread()
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Logger.info("\(TAG) in \(#function) CXStartCallAction")
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guard let call = callManager.callWithLocalId(action.callUUID) else {
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Logger.error("\(TAG) unable to find call in \(#function)")
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return
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}
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// We can't wait for long before fulfilling the CXAction, else CallKit will show a "Failed Call". We don't
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// actually need to wait for the outcome of the handleOutgoingCall promise, because it handles any errors by
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// manually failing the call.
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let callPromise = self.callService.handleOutgoingCall(call)
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callPromise.retainUntilComplete()
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action.fulfill()
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self.provider.reportOutgoingCall(with: call.localId, startedConnectingAt: nil)
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if Environment.getCurrent().preferences.isCallKitPrivacyEnabled() {
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// Update the name used in the CallKit UI for outgoing calls.
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let update = CXCallUpdate()
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update.localizedCallerName = NSLocalizedString("CALLKIT_ANONYMOUS_CONTACT_NAME",
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comment: "The generic name used for calls if CallKit privacy is enabled")
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provider.reportCall(with: call.localId, updated: update)
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}
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}
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func provider(_ provider: CXProvider, perform action: CXAnswerCallAction) {
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AssertIsOnMainThread()
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Logger.info("\(TAG) Received \(#function) CXAnswerCallAction")
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// Retrieve the instance corresponding to the action's call UUID
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guard let call = callManager.callWithLocalId(action.callUUID) else {
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action.fail()
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return
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}
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self.callService.handleAnswerCall(call)
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self.showCall(call)
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action.fulfill()
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}
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public func provider(_ provider: CXProvider, perform action: CXEndCallAction) {
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AssertIsOnMainThread()
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Logger.info("\(TAG) Received \(#function) CXEndCallAction")
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guard let call = callManager.callWithLocalId(action.callUUID) else {
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Logger.error("\(self.TAG) in \(#function) trying to end unknown call with localId: \(action.callUUID)")
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action.fail()
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return
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}
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self.callService.handleLocalHungupCall(call)
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// Signal to the system that the action has been successfully performed.
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action.fulfill()
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// Remove the ended call from the app's list of calls.
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self.callManager.removeCall(call)
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}
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public func provider(_ provider: CXProvider, perform action: CXSetHeldCallAction) {
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AssertIsOnMainThread()
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Logger.info("\(TAG) Received \(#function) CXSetHeldCallAction")
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guard let call = callManager.callWithLocalId(action.callUUID) else {
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action.fail()
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return
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}
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// Update the SignalCall's underlying hold state.
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self.callService.setIsOnHold(call: call, isOnHold: action.isOnHold)
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// Signal to the system that the action has been successfully performed.
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action.fulfill()
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}
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public func provider(_ provider: CXProvider, perform action: CXSetMutedCallAction) {
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AssertIsOnMainThread()
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Logger.info("\(TAG) Received \(#function) CXSetMutedCallAction")
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guard let call = callManager.callWithLocalId(action.callUUID) else {
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Logger.error("\(TAG) Failing CXSetMutedCallAction for unknown call: \(action.callUUID)")
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action.fail()
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return
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}
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self.callService.setIsMuted(call: call, isMuted: action.isMuted)
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action.fulfill()
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}
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public func provider(_ provider: CXProvider, perform action: CXSetGroupCallAction) {
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AssertIsOnMainThread()
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Logger.warn("\(TAG) unimplemented \(#function) for CXSetGroupCallAction")
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}
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public func provider(_ provider: CXProvider, perform action: CXPlayDTMFCallAction) {
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AssertIsOnMainThread()
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Logger.warn("\(TAG) unimplemented \(#function) for CXPlayDTMFCallAction")
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}
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func provider(_ provider: CXProvider, timedOutPerforming action: CXAction) {
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AssertIsOnMainThread()
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owsFail("\(TAG) Timed out \(#function) while performing \(action)")
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// React to the action timeout if necessary, such as showing an error UI.
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}
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func provider(_ provider: CXProvider, didActivate audioSession: AVAudioSession) {
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AssertIsOnMainThread()
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Logger.debug("\(TAG) Received \(#function)")
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CallAudioSession.shared.isRTCAudioEnabled = true
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}
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func provider(_ provider: CXProvider, didDeactivate audioSession: AVAudioSession) {
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AssertIsOnMainThread()
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Logger.debug("\(TAG) Received \(#function)")
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CallAudioSession.shared.isRTCAudioEnabled = false
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}
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// MARK: - Util
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private func disableUnsupportedFeatures(callUpdate: CXCallUpdate) {
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// Call Holding is failing to restart audio when "swapping" calls on the CallKit screen
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// until user returns to in-app call screen.
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callUpdate.supportsHolding = false
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// Not yet supported
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callUpdate.supportsGrouping = false
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callUpdate.supportsUngrouping = false
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// Is there any reason to support this?
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callUpdate.supportsDTMF = false
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}
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}
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