Check if lateinit conference was initialized

app/src/main/java/org/linphone/ui/call/conference/viewmodel/ConferenceViewModel.kt

@@ -366,6 +366,7 @@ class ConferenceViewModel
 
     @UiThread
     fun goToConversation() {
+        if (::conference.isInitialized) {
             coreContext.postOnCoreThread { core ->
                 Log.i("$TAG Navigating to conference's conversation")
                 val chatRoom = conference.chatRoom
@@ -378,6 +379,7 @@ class ConferenceViewModel
                 }
             }
         }
+    }
 
     @UiThread
     fun showLayoutMenu() {
@@ -393,6 +395,7 @@ class ConferenceViewModel
 
     @UiThread
     fun inviteSipUrisIntoConference(uris: List<String>) {
+        if (::conference.isInitialized) {
             coreContext.postOnCoreThread { core ->
                 val addresses = arrayListOf<Address>()
                 for (uri in uris) {
@@ -404,7 +407,10 @@ class ConferenceViewModel
                         Log.e(
                             "$TAG Failed to parse SIP URI [$uri] into address, can't add it to the conference!"
                         )
-                    showRedToast(R.string.conference_failed_to_add_participant_invalid_address_toast, R.drawable.warning_circle)
+                        showRedToast(
+                            R.string.conference_failed_to_add_participant_invalid_address_toast,
+                            R.drawable.warning_circle
+                        )
                     }
                 }
                 val addressesArray = arrayOfNulls<Address>(addresses.size)
@@ -413,9 +419,11 @@ class ConferenceViewModel
                 conference.addParticipants(addressesArray)
             }
         }
+    }
 
     @WorkerThread
     fun kickParticipant(participant: Participant) {
+        if (::conference.isInitialized) {
             coreContext.postOnCoreThread {
                 Log.i(
                     "$TAG Kicking participant [${participant.address.asStringUriOnly()}] out of conference"
@@ -423,9 +431,11 @@ class ConferenceViewModel
                 conference.removeParticipant(participant)
             }
         }
+    }
 
     @WorkerThread
     fun setNewLayout(newLayout: Int) {
+        if (::conference.isInitialized) {
             val call = conference.call
             if (call != null) {
                 val params = call.core.createCallParams(call)
@@ -437,10 +447,12 @@ class ConferenceViewModel
                                 Log.i("$TAG Changing conference layout to [Audio Only]")
                                 params.isVideoEnabled = false
                             }
+
                             ACTIVE_SPEAKER_LAYOUT -> {
                                 Log.i("$TAG Changing conference layout to [Active Speaker]")
                                 params.conferenceVideoLayout = Conference.Layout.ActiveSpeaker
                             }
+
                             GRID_LAYOUT -> {
                                 Log.i("$TAG Changing conference layout to [Grid]")
                                 params.conferenceVideoLayout = Conference.Layout.Grid
@@ -471,6 +483,7 @@ class ConferenceViewModel
                 Log.e("$TAG Failed to get call from conference, aborting layout change")
             }
         }
+    }
 
     @WorkerThread
     private fun getCurrentLayout(call: Call): Int {
@@ -691,6 +704,7 @@ class ConferenceViewModel
 
     @WorkerThread
     private fun addParticipant(participant: Participant) {
+        if (::conference.isInitialized) {
             val list = arrayListOf<ConferenceParticipantModel>()
             list.addAll(participants.value.orEmpty())
 
@@ -722,6 +736,7 @@ class ConferenceViewModel
                 )
             )
         }
+    }
 
     @WorkerThread
     private fun addParticipantDevice(participantDevice: ParticipantDevice) {