Switch call notification to NotificationCompat.CallStyle. This adds answer/decline buttons to the notification so that users can answer incoming calls.

Signed-off-by: Jens Zalzala <jens@shakingearthdigital.com>

Author: anakin78z

app/src/main/java/com/nextcloud/talk/jobs/NotificationWorker.kt

@@ -97,7 +97,6 @@ import com.nextcloud.talk.utils.bundle.BundleKeys.KEY_THREAD_ID
 import com.nextcloud.talk.utils.preferences.AppPreferences
 import io.reactivex.Observable
 import io.reactivex.Observer
-import io.reactivex.android.schedulers.AndroidSchedulers
 import io.reactivex.disposables.Disposable
 import io.reactivex.schedulers.Schedulers
 import okhttp3.JavaNetCookieJar
@@ -313,6 +312,23 @@ class NotificationWorker(context: Context, workerParams: WorkerParameters) : Wor
             val uri = signatureVerification.user!!.baseUrl!!.toUri()
             val baseUrl = uri.host
 
+            val callerPersonBuilder = Person.Builder()
+                .setName(conversation.displayName)
+                .setImportant(true)
+            if (conversation.type == ConversationEnums.ConversationType.ROOM_TYPE_ONE_TO_ONE_CALL) {
+                val avatarUrl = ApiUtils.getUrlForAvatar(
+                    signatureVerification.user!!.baseUrl!!,
+                    conversation.name,
+                    false,
+                    darkMode = DisplayUtils.isDarkModeOn(applicationContext)
+                )
+                loadAvatarSync(avatarUrl, applicationContext)?.let { callerPersonBuilder.setIcon(it) }
+            }
+            val callerPerson = callerPersonBuilder.build()
+
+            val isVideoCall = (conversation.callFlag and Participant.InCallFlags.WITH_VIDEO) > 0
+            val primaryAnswerIntent = if (isVideoCall) answerVideoPendingIntent else answerVoicePendingIntent
+
             val notification =
                 NotificationCompat.Builder(applicationContext, notificationChannelId)
                     .setPriority(NotificationCompat.PRIORITY_HIGH)
@@ -329,9 +345,10 @@ class NotificationWorker(context: Context, workerParams: WorkerParameters) : Wor
                     .setContentIntent(fullScreenPendingIntent)
                     .setFullScreenIntent(fullScreenPendingIntent, true)
                     .setSound(soundUri)
-                    .addAction(R.drawable.ic_call_white_24dp, applicationContext.getString(R.string.nc_call_action_answer_audio), answerVoicePendingIntent)
-                    .addAction(R.drawable.ic_videocam_white_24px, applicationContext.getString(R.string.nc_call_action_answer_video), answerVideoPendingIntent)
-                    .addAction(R.drawable.ic_call_end_white_24px, applicationContext.getString(R.string.nc_call_action_decline), declinePendingIntent)
+                    .setStyle(
+                        NotificationCompat.CallStyle.forIncomingCall(callerPerson, declinePendingIntent, primaryAnswerIntent)
+                            .setIsVideo(isVideoCall)
+                    )
                     .build()
             notification.flags = notification.flags or Notification.FLAG_INSISTENT
 
@@ -342,7 +359,7 @@ class NotificationWorker(context: Context, workerParams: WorkerParameters) : Wor
 
         chatNetworkDataSource?.getRoom(userBeingCalled, roomToken = pushMessage.id!!)
             ?.subscribeOn(Schedulers.io())
-            ?.observeOn(AndroidSchedulers.mainThread())
+            ?.observeOn(Schedulers.io())
             ?.subscribe(object : Observer<ConversationModel> {
                 override fun onSubscribe(d: Disposable) {
                     // unused atm