mobile: call settings, request camera on iOS on call start (#701)

* mobile: call settings, request camera on iOS on call start

* refactor preferences

* fix typo

apps/ios/Shared/Model/SimpleXAPI.swift

@@ -660,7 +660,9 @@ func processReceivedMsg(_ res: ChatResponse) {
                 call.callState = .offerReceived
                 call.peerMedia = callType.media
                 call.sharedKey = sharedKey
-                m.callCommand = .offer(offer: offer.rtcSession, iceCandidates: offer.rtcIceCandidates, media: callType.media, aesKey: sharedKey, useWorker: true)
+                let useRelay = UserDefaults.standard.bool(forKey: DEFAULT_WEBRTC_POLICY_RELAY)
+                logger.debug(".callOffer useRelay \(useRelay)")
+                m.callCommand = .offer(offer: offer.rtcSession, iceCandidates: offer.rtcIceCandidates, media: callType.media, aesKey: sharedKey, useWorker: true, relay: useRelay)
             }
         case let .callAnswer(contact, answer):
             withCall(contact) { call in

apps/ios/Shared/SimpleXApp.swift

@@ -21,6 +21,7 @@ struct SimpleXApp: App {
 
     init() {
         hs_init(0, nil)
+        UserDefaults.standard.register(defaults: appDefaults)
         BGManager.shared.register()
         NtfManager.shared.registerCategories()
     }

apps/ios/Shared/Views/Call/CallManager.swift

@@ -19,7 +19,7 @@ class CallManager {
         let m = ChatModel.shared
         if let call = m.activeCall, call.callkitUUID == callUUID {
             m.showCallView = true
-            m.callCommand = .capabilities(useWorker: true)
+            m.callCommand = .capabilities(media: call.localMedia, useWorker: true)
             return true
         }
         return false
@@ -45,7 +45,9 @@ class CallManager {
             sharedKey: invitation.sharedKey
         )
         m.showCallView = true
-        m.callCommand = .start(media: invitation.peerMedia, aesKey: invitation.sharedKey, useWorker: true)
+        let useRelay = UserDefaults.standard.bool(forKey: DEFAULT_WEBRTC_POLICY_RELAY)
+        logger.debug("answerIncomingCall useRelay \(useRelay)")
+        m.callCommand = .start(media: invitation.peerMedia, aesKey: invitation.sharedKey, useWorker: true, relay: useRelay)
     }
 
     func endCall(callUUID: UUID, completed: @escaping (Bool) -> Void) {

apps/ios/Shared/Views/Call/WebRTC.swift

@@ -102,7 +102,7 @@ struct WVAPIMessage: Equatable, Decodable, Encodable {
 }
 
 enum WCallCommand: Equatable, Encodable, Decodable {
-    case capabilities(useWorker: Bool? = nil)
+    case capabilities(media: CallMediaType, useWorker: Bool? = nil)
     case start(media: CallMediaType, aesKey: String? = nil, useWorker: Bool? = nil, iceServers: [RTCIceServer]? = nil, relay: Bool? = nil)
     case offer(offer: String, iceCandidates: String, media: CallMediaType, aesKey: String? = nil, useWorker: Bool? = nil, iceServers: [RTCIceServer]? = nil, relay: Bool? = nil)
     case answer(answer: String, iceCandidates: String)
@@ -143,8 +143,9 @@ enum WCallCommand: Equatable, Encodable, Decodable {
     func encode(to encoder: Encoder) throws {
         var container = encoder.container(keyedBy: CodingKeys.self)
         switch self {
-        case let .capabilities(useWorker):
+        case let .capabilities(media, useWorker):
             try container.encode("capabilities", forKey: .type)
+            try container.encode(media, forKey: .media)
             try container.encode(useWorker, forKey: .useWorker)
         case let .start(media, aesKey, useWorker, iceServers, relay):
             try container.encode("start", forKey: .type)
@@ -186,8 +187,9 @@ enum WCallCommand: Equatable, Encodable, Decodable {
         let type = try container.decode(String.self, forKey: CodingKeys.type)
         switch type {
         case "capabilities":
+            let media = try container.decode(CallMediaType.self, forKey: CodingKeys.media)
             let useWorker = try container.decode((Bool?).self, forKey: CodingKeys.useWorker)
-            self = .capabilities(useWorker: useWorker)
+            self = .capabilities(media: media, useWorker: useWorker)
         case "start":
             let media = try container.decode(CallMediaType.self, forKey: CodingKeys.media)
             let aesKey = try? container.decode(String.self, forKey: CodingKeys.aesKey)

apps/ios/Shared/Views/UserSettings/CallSettings.swift

@@ -0,0 +1,25 @@
+//
+//  CallSettings.swift
+//  SimpleX (iOS)
+//
+//  Created by Evgeny on 27/05/2022.
+//  Copyright © 2022 SimpleX Chat. All rights reserved.
+//
+
+import SwiftUI
+
+struct CallSettings: View {
+    @AppStorage(DEFAULT_WEBRTC_POLICY_RELAY) private var webrtcPolicyRelay = true
+
+    var body: some View {
+        List {
+            Toggle("Connect via relay", isOn: $webrtcPolicyRelay)
+        }
+    }
+}
+
+struct CallSettings_Previews: PreviewProvider {
+    static var previews: some View {
+        CallSettings()
+    }
+}

apps/ios/Shared/Views/UserSettings/SettingsView.swift

@@ -16,6 +16,13 @@ let appBuild = Bundle.main.object(forInfoDictionaryKey: "CFBundleVersion")  as?
 
 let DEFAULT_USE_NOTIFICATIONS = "useNotifications"
 let DEFAULT_PENDING_CONNECTIONS = "pendingConnections"
+let DEFAULT_WEBRTC_POLICY_RELAY = "webrtcPolicyRelay"
+
+let appDefaults: [String:Any] = [
+    DEFAULT_USE_NOTIFICATIONS: false,
+    DEFAULT_PENDING_CONNECTIONS: true,
+    DEFAULT_WEBRTC_POLICY_RELAY: true
+]
 
 private var indent: CGFloat = 36
 
@@ -59,6 +66,12 @@ struct SettingsView: View {
                     } label: {
                         settingsRow("server.rack") { Text("SMP servers") }
                     }
+                    NavigationLink {
+                        CallSettings()
+                            .navigationTitle("Call settings")
+                    } label: {
+                        settingsRow("video") { Text("Call settings") }
+                    }
                 }
 
                 Section("Help") {