Disable conference waiting room join button if network is unreachable

app/src/main/java/org/linphone/activities/main/conference/fragments/ConferenceWaitingRoomFragment.kt

@@ -117,6 +117,14 @@ class ConferenceWaitingRoomFragment : GenericFragment<ConferenceWaitingRoomFragm
             }
         }
 
+        viewModel.networkNotReachableEvent.observe(
+            viewLifecycleOwner
+        ) {
+            it.consume {
+                (activity as MainActivity).showSnackBar(R.string.call_error_network_unreachable)
+            }
+        }
+
         checkPermissions()
     }
 

app/src/main/java/org/linphone/activities/main/conference/viewmodels/ConferenceWaitingRoomViewModel.kt

@@ -59,6 +59,8 @@ class ConferenceWaitingRoomViewModel : MessageNotifierViewModel() {
 
     val joinInProgress = MutableLiveData<Boolean>()
 
+    val networkReachable = MutableLiveData<Boolean>()
+
     val askPermissionEvent: MutableLiveData<Event<String>> by lazy {
         MutableLiveData<Event<String>>()
     }
@@ -75,6 +77,10 @@ class ConferenceWaitingRoomViewModel : MessageNotifierViewModel() {
         MutableLiveData<Event<Boolean>>()
     }
 
+    val networkNotReachableEvent: MutableLiveData<Event<Boolean>> by lazy {
+        MutableLiveData<Event<Boolean>>()
+    }
+
     private val callParams: CallParams = coreContext.core.createCallParams(null)!!
 
     private val listener: CoreListenerStub = object : CoreListenerStub() {
@@ -112,12 +118,26 @@ class ConferenceWaitingRoomViewModel : MessageNotifierViewModel() {
                 leaveWaitingRoomEvent.value = Event(true)
             }
         }
+
+        override fun onNetworkReachable(core: Core, reachable: Boolean) {
+            Log.i("[Conference Waiting Room] Network reachability changed: [$reachable]")
+            networkReachable.value = reachable
+            if (!reachable) {
+                networkNotReachableEvent.value = Event(true)
+            }
+        }
     }
 
     init {
         val core = coreContext.core
         core.addListener(listener)
 
+        val reachable = core.isNetworkReachable
+        networkReachable.value = reachable
+        if (!reachable) {
+            networkNotReachableEvent.value = Event(true)
+        }
+
         callParams.isMicEnabled = PermissionHelper.get().hasRecordAudioPermission() && coreContext.core.isMicEnabled
         Log.i("[Conference Waiting Room] Microphone will be ${if (callParams.isMicEnabled) "enabled" else "muted"}")
         updateMicState()

app/src/main/res/layout/conference_waiting_room_fragment.xml

@@ -113,7 +113,7 @@
                 android:layout_marginEnd="20dp"
                 android:layout_weight="1"
                 android:background="@drawable/button_orange_background"
-                android:enabled="@{!viewModel.joinInProgress}"
+                android:enabled="@{viewModel.networkReachable && !viewModel.joinInProgress}"
                 android:gravity="center"
                 android:onClick="@{() -> viewModel.start()}"
                 android:paddingLeft="20dp"