Add attended transfer call in VoipExtraButtonsView

Classes/Swift/Voip/Theme/VoipTexts.swift

@@ -38,6 +38,7 @@ import UIKit
 	@objc static let call_context_action_pause = NSLocalizedString("Pause call",comment:"")
 	@objc static let call_context_action_resume = NSLocalizedString("Resume call",comment:"")
 	@objc static let call_context_action_transfer = NSLocalizedString("Transfer call",comment:"")
+	@objc static let call_context_action_attended_transfer = NSLocalizedString("Attended transfer",comment:"")
 	@objc static let call_error_declined = NSLocalizedString("Call has been declined",comment:"")
 	@objc static let call_error_generic = NSLocalizedString("Error: %s",comment:"")
 	@objc static let call_error_incompatible_media_params = NSLocalizedString("Incompatible media parameters",comment:"")

Classes/Swift/Voip/Views/Fragments/VoipExtraButtonsView.swift

@@ -84,11 +84,15 @@ class VoipExtraButtonsView: UIStackView {
 		row2.distribution = .fillEqually
 		row2.alignment = .center
 		
-		let transfer = VoipExtraButton(text: VoipTexts.call_action_transfer_call, buttonTheme: VoipTheme.call_action("voip_call_forward"),onClickAction: {
-			let view: DialerView = self.VIEW(DialerView.compositeViewDescription());
-			view.setAddress("")
-			CallManager.instance().nextCallIsTransfer = true
-			PhoneMainView.instance().changeCurrentView(view.compositeViewDescription())
+		var transfer = VoipExtraButton(text: CallsViewModel.shared.inactiveCallsCount.value! < 1 ? VoipTexts.call_action_transfer_call : VoipTexts.call_context_action_attended_transfer, buttonTheme: VoipTheme.call_action("voip_call_forward"),onClickAction: {
+			if CallsViewModel.shared.inactiveCallsCount.value! < 1 {
+				let view: DialerView = self.VIEW(DialerView.compositeViewDescription());
+				view.setAddress("")
+				CallManager.instance().nextCallIsTransfer = true
+				PhoneMainView.instance().changeCurrentView(view.compositeViewDescription())
+			}else{
+				self.attendedTransfer()
+			}
 		})
 		row2.addArrangedSubview(transfer)
 		
@@ -127,6 +131,9 @@ class VoipExtraButtonsView: UIStackView {
 			addcall.isHidden = isIn == true
 		}
 		
+		CallsViewModel.shared.inactiveCallsCount.readCurrentAndObserve { title in
+			transfer.setTitle(title! < 1 ? VoipTexts.call_action_transfer_call : VoipTexts.call_context_action_attended_transfer, for: .normal)
+		}
 	}
 	
 	func refresh() {
@@ -134,6 +141,37 @@ class VoipExtraButtonsView: UIStackView {
 		CallsViewModel.shared.inactiveCallsCount.notifyValue()
 	}
 	
-	
+	func attendedTransfer() {
+		var core = CallManager.instance().lc
+		var currentCall = core?.currentCall
 
+		if (currentCall == nil) {
+			Log.e("[Call Controls] Can't do an attended transfer without a current call")
+			return
+		}
+		
+		if let callsNb = core?.callsNb, callsNb <= 1 {
+			Log.e("[Call Controls] Need at least two calls to do an attended transfer")
+			return
+		}
+		
+		var callToTransferTo = core!.calls.last { call in
+			call.state == Call.State.Paused
+		}
+		
+		if (callToTransferTo == nil) {
+			Log.e("[Call Controls] Couldn't find a call in Paused state to transfer current call to")
+			return
+		}
+
+		Log.i(
+			"[Call Controls] Doing an attended transfer between active call [${currentCall.remoteAddress.asStringUriOnly()}] and paused call [${callToTransferTo.remoteAddress.asStringUriOnly()}]"
+		)
+		
+		do{
+			try callToTransferTo?.transferToAnother(dest: currentCall!)
+		}catch{
+			Log.e("[Call Controls] Attended transfer failed!")
+		}
+	}
 }