Add first time in group check.

app/src/main/java/org/thoughtcrime/securesms/conversation/v2/ConversationFragment.kt

@@ -280,6 +280,7 @@ import org.thoughtcrime.securesms.util.BottomSheetUtil
 import org.thoughtcrime.securesms.util.BubbleUtil
 import org.thoughtcrime.securesms.util.CommunicationActions
 import org.thoughtcrime.securesms.util.ContextUtil
+import org.thoughtcrime.securesms.util.ConversationUtil
 import org.thoughtcrime.securesms.util.DateUtils
 import org.thoughtcrime.securesms.util.Debouncer
 import org.thoughtcrime.securesms.util.DeleteDialog
@@ -602,6 +603,16 @@ class ConversationFragment :
     }
 
     viewModel.updateIdentityRecordsInBackground()
+
+    if (args.isFirstTimeInSelfCreatedGroup) {
+      conversationGroupViewModel.checkJustSelfInGroup().subscribeBy(
+        onSuccess = {
+          GroupLinkInviteFriendsBottomSheetDialogFragment.show(childFragmentManager, it)
+        }
+      ).addTo(disposables)
+    }
+
+    ConversationUtil.refreshRecipientShortcuts()
   }
 
   override fun onPause() {

app/src/main/java/org/thoughtcrime/securesms/conversation/v2/groups/ConversationGroupViewModel.kt

@@ -3,11 +3,13 @@ package org.thoughtcrime.securesms.conversation.v2.groups
 import androidx.lifecycle.ViewModel
 import androidx.lifecycle.ViewModelProvider
 import io.reactivex.rxjava3.android.schedulers.AndroidSchedulers
+import io.reactivex.rxjava3.core.Maybe
 import io.reactivex.rxjava3.core.Observable
 import io.reactivex.rxjava3.core.Single
 import io.reactivex.rxjava3.disposables.CompositeDisposable
 import io.reactivex.rxjava3.kotlin.addTo
 import io.reactivex.rxjava3.kotlin.plusAssign
+import io.reactivex.rxjava3.schedulers.Schedulers
 import io.reactivex.rxjava3.subjects.BehaviorSubject
 import io.reactivex.rxjava3.subjects.Subject
 import org.signal.core.util.Result
@@ -15,6 +17,7 @@ import org.signal.core.util.concurrent.subscribeWithSubject
 import org.thoughtcrime.securesms.conversation.v2.ConversationRecipientRepository
 import org.thoughtcrime.securesms.database.GroupTable
 import org.thoughtcrime.securesms.database.model.GroupRecord
+import org.thoughtcrime.securesms.groups.GroupId
 import org.thoughtcrime.securesms.groups.ui.GroupChangeFailureReason
 import org.thoughtcrime.securesms.groups.v2.GroupBlockJoinRequestResult
 import org.thoughtcrime.securesms.groups.v2.GroupManagementRepository
@@ -37,6 +40,8 @@ class ConversationGroupViewModel(
   private val _groupActiveState: Subject<ConversationGroupActiveState> = BehaviorSubject.create()
   private val _memberLevel: BehaviorSubject<ConversationGroupMemberLevel> = BehaviorSubject.create()
 
+  private var firstTimeInviteFriendsTriggered: Boolean = false
+
   val groupRecordSnapshot: GroupRecord?
     get() = _groupRecord.value
 
@@ -106,6 +111,27 @@ class ConversationGroupViewModel(
       .addTo(disposables)
   }
 
+  /**
+   * Emits the group id if we are the only member of the group.
+   */
+  fun checkJustSelfInGroup(): Maybe<GroupId.V2> {
+    if (firstTimeInviteFriendsTriggered) {
+      return Maybe.empty()
+    }
+
+    firstTimeInviteFriendsTriggered = true
+
+    return _groupRecord
+      .firstOrError()
+      .flatMapMaybe { groupRecord ->
+        groupManagementRepository.isJustSelf(groupRecord.id).flatMapMaybe {
+          if (it && groupRecord.id.isV2) Maybe.just(groupRecord.id.requireV2()) else Maybe.empty()
+        }
+      }
+      .subscribeOn(Schedulers.io())
+      .observeOn(AndroidSchedulers.mainThread())
+  }
+
   class Factory(private val threadId: Long, private val recipientRepository: ConversationRecipientRepository) : ViewModelProvider.Factory {
     override fun <T : ViewModel> create(modelClass: Class<T>): T {
       return modelClass.cast(ConversationGroupViewModel(threadId, recipientRepository = recipientRepository)) as T

app/src/main/java/org/thoughtcrime/securesms/groups/v2/GroupManagementRepository.kt

@@ -106,4 +106,10 @@ class GroupManagementRepository @JvmOverloads constructor(private val context: C
       SignalDatabase.groups.removeUnmigratedV1Members(groupId)
     }.subscribeOn(Schedulers.io())
   }
+
+  fun isJustSelf(groupId: GroupId): Single<Boolean> {
+    return Single.fromCallable {
+      SignalDatabase.groups.requireGroup(groupId).members == listOf(Recipient.self().id)
+    }
+  }
 }