Add swift tutorials for basic call, voip push and chat features with SDK 5.0

ios/swift/4-CallKitTutorial/CallKitTutorial/CallKitProviderDelegate.swift

@@ -0,0 +1,99 @@
+//
+//  ProviderDelegate.swift
+//  CallTutorial
+//
+//  Created by QuentinArguillere on 05/08/2020.
+//  Copyright © 2020 BelledonneCommunications. All rights reserved.
+//
+
+import Foundation
+import CallKit
+import linphonesw
+import AVFoundation
+
+
+class CallKitProviderDelegate : NSObject
+{
+    private let provider: CXProvider
+    let mCallController = CXCallController()
+    var tutorialContext : CallKitExampleContext!
+
+    var incomingCallUUID : UUID!
+    
+    init(context: CallKitExampleContext)
+    {
+        tutorialContext = context
+        let providerConfiguration = CXProviderConfiguration(localizedName: Bundle.main.infoDictionary!["CFBundleName"] as! String)
+        providerConfiguration.supportsVideo = true
+        providerConfiguration.supportedHandleTypes = [.generic]
+
+        providerConfiguration.maximumCallsPerCallGroup = 1
+        providerConfiguration.maximumCallGroups = 1
+        
+        provider = CXProvider(configuration: providerConfiguration)
+        super.init()
+        provider.setDelegate(self, queue: nil) // The CXProvider delegate will trigger CallKit related callbacks
+        
+    }
+
+    func incomingCall()
+    {
+        incomingCallUUID = UUID()
+        let update = CXCallUpdate()
+        update.remoteHandle = CXHandle(type:.generic, value: tutorialContext.incomingCallName)
+        
+        provider.reportNewIncomingCall(with: incomingCallUUID, update: update, completion: { error in }) // Report to CallKit a call is incoming
+    }
+    
+    func stopCall()
+    {
+        let endCallAction = CXEndCallAction(call: incomingCallUUID)
+        let transaction = CXTransaction(action: endCallAction)
+        
+        mCallController.request(transaction, completion: { error in }) // Report to CallKit a call must end
+    }
+
+}
+
+
+// In this extension, we implement the action we want to be done when CallKit is notified of something.
+// This can happen through the CallKit GUI in the app, or directly in the code (see, incomingCall(), stopCall() functions above)
+extension CallKitProviderDelegate: CXProviderDelegate {
+    
+    func provider(_ provider: CXProvider, perform action: CXEndCallAction) {
+		do {
+			if (tutorialContext.mCall?.state != .End && tutorialContext.mCall?.state != .Released)  {
+				try tutorialContext.mCall?.terminate()
+			}
+		} catch { NSLog(error.localizedDescription) }
+		
+		tutorialContext.isCallRunning = false
+		tutorialContext.isCallIncoming = false
+        action.fulfill()
+    }
+
+    func provider(_ provider: CXProvider, perform action: CXAnswerCallAction) {
+        do {
+            try tutorialContext.mCall?.accept()
+            tutorialContext.isCallRunning = true
+        } catch {
+            print(error)
+        }
+        action.fulfill()
+    }
+
+    func provider(_ provider: CXProvider, perform action: CXSetHeldCallAction) {}
+    func provider(_ provider: CXProvider, perform action: CXStartCallAction) {}
+    func provider(_ provider: CXProvider, perform action: CXSetMutedCallAction) {}
+    func provider(_ provider: CXProvider, perform action: CXPlayDTMFCallAction) {}
+    func provider(_ provider: CXProvider, timedOutPerforming action: CXAction) {}
+    func providerDidReset(_ provider: CXProvider) {}
+    
+    func provider(_ provider: CXProvider, didActivate audioSession: AVAudioSession) {
+        tutorialContext.mCore.activateAudioSession(actived: true)
+    }
+
+    func provider(_ provider: CXProvider, didDeactivate audioSession: AVAudioSession) {
+        tutorialContext.mCore.activateAudioSession(actived: false)
+    }
+}