toggle between 'chats' and 'all chats'

app/src/main/java/im/conversations/android/ui/fragment/main/OverviewFragment.java

@@ -34,10 +34,7 @@ public class OverviewFragment extends Fragment {
                 new ViewModelProvider(this, getDefaultViewModelProviderFactory());
         this.overviewViewModel = viewModelProvider.get(OverviewViewModel.class);
         binding.setLifecycleOwner(getViewLifecycleOwner());
-        binding.searchBar.setNavigationOnClickListener(
+        binding.searchBar.setNavigationOnClickListener(view -> binding.drawerLayout.open());
-                view -> {
-                    binding.drawerLayout.open();
-                });
         binding.searchView.addTransitionListener(
                 (searchView, previousState, newState) -> {
                     final var activity = requireActivity();
@@ -55,6 +52,7 @@ public class OverviewFragment extends Fragment {
                 item -> {
                     if (item.getItemId() == R.id.add_account) {
                         startActivity(new Intent(requireContext(), SetupActivity.class));
+                        return false;
                     }
                     return true;
                 });
@@ -63,9 +61,22 @@ public class OverviewFragment extends Fragment {
                 .getAccounts()
                 .observe(getViewLifecycleOwner(), this::onAccountsUpdated);
         this.overviewViewModel.getGroups().observe(getViewLifecycleOwner(), this::onGroupsUpdated);
+        this.overviewViewModel
+                .getChatFilterAvailable()
+                .observe(getViewLifecycleOwner(), this::onChatFilterAvailable);
         return binding.getRoot();
     }
 
+    private void onChatFilterAvailable(final Boolean available) {
+        final var menu = this.binding.navigationView.getMenu();
+        final var chatsMenuItem = menu.findItem(R.id.chats);
+        if (Boolean.TRUE.equals(available)) {
+            chatsMenuItem.setTitle(R.string.all_chats);
+        } else {
+            chatsMenuItem.setTitle(R.string.chats);
+        }
+    }
+
     private void onGroupsUpdated(final List<String> groups) {
         final var menu = this.binding.navigationView.getMenu();
         final var menuItemSpaces = menu.findItem(R.id.spaces);

app/src/main/java/im/conversations/android/ui/model/OverviewViewModel.java

@@ -4,21 +4,41 @@ import android.app.Application;
 import androidx.annotation.NonNull;
 import androidx.lifecycle.AndroidViewModel;
 import androidx.lifecycle.LiveData;
+import androidx.lifecycle.MediatorLiveData;
 import androidx.lifecycle.Transformations;
 import im.conversations.android.database.model.AccountIdentifier;
 import im.conversations.android.repository.AccountRepository;
 import im.conversations.android.repository.ChatRepository;
 import java.util.List;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
 public class OverviewViewModel extends AndroidViewModel {
 
     private final AccountRepository accountRepository;
     private final ChatRepository chatRepository;
+    private final LiveData<List<AccountIdentifier>> accounts;
+    private final LiveData<List<String>> groups;
+    private final MediatorLiveData<Boolean> chatFilterAvailable = new MediatorLiveData<>();
+
+    private static final Logger LOGGER = LoggerFactory.getLogger(OverviewViewModel.class);
 
     public OverviewViewModel(@NonNull Application application) {
         super(application);
         this.accountRepository = new AccountRepository(application);
         this.chatRepository = new ChatRepository(application);
+        this.accounts = this.accountRepository.getAccounts();
+        this.groups = this.chatRepository.getGroups();
+        this.chatFilterAvailable.addSource(
+                this.accounts, accounts -> setChatFilterAvailable(accounts, groups.getValue()));
+        this.chatFilterAvailable.addSource(
+                this.groups, groups -> setChatFilterAvailable(this.accounts.getValue(), groups));
+    }
+
+    private void setChatFilterAvailable(
+            final List<AccountIdentifier> accounts, final List<String> groups) {
+        this.chatFilterAvailable.setValue(
+                (accounts != null && accounts.size() > 1) || (groups != null && groups.size() > 0));
     }
 
     public LiveData<List<AccountIdentifier>> getAccounts() {
@@ -28,4 +48,8 @@ public class OverviewViewModel extends AndroidViewModel {
     public LiveData<List<String>> getGroups() {
         return Transformations.distinctUntilChanged(this.chatRepository.getGroups());
     }
+
+    public LiveData<Boolean> getChatFilterAvailable() {
+        return Transformations.distinctUntilChanged(this.chatFilterAvailable);
+    }
 }

app/src/main/res/values/strings.xml

@@ -1016,5 +1016,6 @@
     <string name="all_chats">All chats</string>
     <string name="accounts">Accounts</string>
     <string name="spaces">Spaces</string>
+    <string name="chats">Chats</string>
 
 </resources>