From 2ab24f893abf1355646ca04113a509449ce82faa Mon Sep 17 00:00:00 2001
From: Sylvain Berfini <sylvain.berfini@belledonne-communications.com>
Date: Mon, 11 Apr 2022 11:00:54 +0200
Subject: [PATCH] Showing snack bar when you're the first to join a conference
 or when you're the last one in it

---
 .../main/files/fragments/PdfViewerFragment.kt |  1 -
 .../voip/fragments/ConferenceCallFragment.kt  | 18 +++++++++++++++++
 .../voip/viewmodels/ConferenceViewModel.kt    | 20 +++++++++++++++++--
 app/src/main/res/values-fr/strings.xml        |  2 ++
 app/src/main/res/values/strings.xml           |  2 ++
 5 files changed, 40 insertions(+), 3 deletions(-)

diff --git a/app/src/main/java/org/linphone/activities/main/files/fragments/PdfViewerFragment.kt b/app/src/main/java/org/linphone/activities/main/files/fragments/PdfViewerFragment.kt
index d08293e38..799543fc4 100644
--- a/app/src/main/java/org/linphone/activities/main/files/fragments/PdfViewerFragment.kt
+++ b/app/src/main/java/org/linphone/activities/main/files/fragments/PdfViewerFragment.kt
@@ -56,6 +56,5 @@ class PdfViewerFragment : GenericViewerFragment<FilePdfViewerFragmentBinding>()
 
         adapter = PdfPagesListAdapter(viewModel)
         binding.pdfViewPager.adapter = adapter
-        //adapter.notifyDataSetChanged()
     }
 }
diff --git a/app/src/main/java/org/linphone/activities/voip/fragments/ConferenceCallFragment.kt b/app/src/main/java/org/linphone/activities/voip/fragments/ConferenceCallFragment.kt
index 516d56480..15fbb90a1 100644
--- a/app/src/main/java/org/linphone/activities/voip/fragments/ConferenceCallFragment.kt
+++ b/app/src/main/java/org/linphone/activities/voip/fragments/ConferenceCallFragment.kt
@@ -136,6 +136,24 @@ class ConferenceCallFragment : GenericFragment<VoipConferenceCallFragmentBinding
             }
         }
 
+        conferenceViewModel.firstToJoinEvent.observe(
+            viewLifecycleOwner
+        ) {
+            Snackbar
+                .make(binding.coordinator, R.string.conference_first_to_join, Snackbar.LENGTH_LONG)
+                .setAnchorView(binding.primaryButtons.hangup)
+                .show()
+        }
+
+        conferenceViewModel.allParticipantsLeftEvent.observe(
+            viewLifecycleOwner
+        ) {
+            Snackbar
+                .make(binding.coordinator, R.string.conference_last_user, Snackbar.LENGTH_LONG)
+                .setAnchorView(binding.primaryButtons.hangup)
+                .show()
+        }
+
         controlsViewModel.goToConferenceParticipantsListEvent.observe(
             viewLifecycleOwner
         ) {
diff --git a/app/src/main/java/org/linphone/activities/voip/viewmodels/ConferenceViewModel.kt b/app/src/main/java/org/linphone/activities/voip/viewmodels/ConferenceViewModel.kt
index bd7c8d8f2..8ac88d497 100644
--- a/app/src/main/java/org/linphone/activities/voip/viewmodels/ConferenceViewModel.kt
+++ b/app/src/main/java/org/linphone/activities/voip/viewmodels/ConferenceViewModel.kt
@@ -49,13 +49,21 @@ class ConferenceViewModel : ViewModel() {
     val isRecording = MutableLiveData<Boolean>()
     val isRemotelyRecorded = MutableLiveData<Boolean>()
 
+    val maxParticipantsForMosaicLayout = corePreferences.maxConferenceParticipantsForMosaicLayout
+
+    val speakingParticipant = MutableLiveData<ConferenceParticipantDeviceData>()
+
     val participantAdminStatusChangedEvent: MutableLiveData<Event<ConferenceParticipantData>> by lazy {
         MutableLiveData<Event<ConferenceParticipantData>>()
     }
 
-    val maxParticipantsForMosaicLayout = corePreferences.maxConferenceParticipantsForMosaicLayout
+    val firstToJoinEvent: MutableLiveData<Event<Boolean>> by lazy {
+        MutableLiveData<Event<Boolean>>()
+    }
 
-    val speakingParticipant = MutableLiveData<ConferenceParticipantDeviceData>()
+    val allParticipantsLeftEvent: MutableLiveData<Event<Boolean>> by lazy {
+        MutableLiveData<Event<Boolean>>()
+    }
 
     private val conferenceListener = object : ConferenceListenerStub() {
         override fun onParticipantAdded(conference: Conference, participant: Participant) {
@@ -72,6 +80,10 @@ class ConferenceViewModel : ViewModel() {
         override fun onParticipantRemoved(conference: Conference, participant: Participant) {
             Log.i("[Conference] Participant removed: ${participant.address.asStringUriOnly()}")
             updateParticipantsList(conference)
+
+            if (conferenceParticipants.value.orEmpty().isEmpty()) {
+                allParticipantsLeftEvent.value = Event(true)
+            }
         }
 
         override fun onParticipantDeviceAdded(
@@ -246,6 +258,10 @@ class ConferenceViewModel : ViewModel() {
         isRecording.value = conference.isRecording
 
         updateConferenceLayout(conference)
+
+        if (conferenceParticipants.value.orEmpty().isEmpty()) {
+            firstToJoinEvent.value = Event(true)
+        }
     }
 
     fun configureConference(conference: Conference) {
diff --git a/app/src/main/res/values-fr/strings.xml b/app/src/main/res/values-fr/strings.xml
index 9c27353db..8077d4717 100644
--- a/app/src/main/res/values-fr/strings.xml
+++ b/app/src/main/res/values-fr/strings.xml
@@ -721,4 +721,6 @@
     <string name="conference_low_bandwidth">Faible bande passante détectée, vidéo désactivée</string>
     <string name="content_description_toggle_conference_info_details">Afficher/cacher les détails de la conférence</string>
     <string name="content_description_conference_participants">Participants de la conférence</string>
+    <string name="conference_first_to_join">Vous êtes le premier à avoir rejoint la conférence</string>
+    <string name="conference_last_user">Tous les autres participants ont quitté la conférence</string>
 </resources>
\ No newline at end of file
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 485ec302e..00fb4c6f6 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -290,6 +290,8 @@
     <string name="conference_invitation_received_notification">You have been invited to a conference</string>
     <string name="conference_invitation">Conference invitation</string>
     <string name="conference_low_bandwidth">Low bandwidth detected, disabling video</string>
+    <string name="conference_first_to_join">You\'re the first to join the conference</string>
+    <string name="conference_last_user">All other participants have left the conference</string>
 
     <!-- Call -->
     <string name="call_incoming_title">Incoming Call</string>