Add warning dialog for chat color deletion with no uses.

app/src/main/java/org/thoughtcrime/securesms/conversation/colors/ui/ChatColorSelectionFragment.kt

@@ -46,7 +46,11 @@ class ChatColorSelectionFragment : Fragment(R.layout.chat_color_selection_fragme
 
     viewModel.events.observe(viewLifecycleOwner) { event ->
       if (event is ChatColorSelectionViewModel.Event.ConfirmDeletion) {
-        showWarningDialog(event)
+        if (event.usageCount > 0) {
+          showWarningDialogForMultipleUses(event)
+        } else {
+          showWarningDialogForNoUses(event)
+        }
       }
     }
   }
@@ -56,7 +60,20 @@ class ChatColorSelectionFragment : Fragment(R.layout.chat_color_selection_fragme
     viewModel.refresh()
   }
 
-  private fun showWarningDialog(confirmDeletion: ChatColorSelectionViewModel.Event.ConfirmDeletion) {
+  private fun showWarningDialogForNoUses(confirmDeletion: ChatColorSelectionViewModel.Event.ConfirmDeletion) {
+    MaterialAlertDialogBuilder(requireContext())
+      .setMessage(R.string.ChatColorSelectionFragment__delete_chat_color)
+      .setPositiveButton(R.string.ChatColorSelectionFragment__delete) { dialog, _ ->
+        viewModel.deleteNow(confirmDeletion.chatColors)
+        dialog.dismiss()
+      }
+      .setNegativeButton(android.R.string.cancel) { dialog, _ ->
+        dialog.dismiss()
+      }
+      .show()
+  }
+
+  private fun showWarningDialogForMultipleUses(confirmDeletion: ChatColorSelectionViewModel.Event.ConfirmDeletion) {
     MaterialAlertDialogBuilder(requireContext())
       .setTitle(R.string.ChatColorSelectionFragment__delete_color)
       .setMessage(resources.getQuantityString(R.plurals.ChatColorSelectionFragment__this_custom_color_is_used, confirmDeletion.usageCount, confirmDeletion.usageCount))

app/src/main/java/org/thoughtcrime/securesms/conversation/colors/ui/ChatColorSelectionViewModel.kt

@@ -43,11 +43,7 @@ class ChatColorSelectionViewModel(private val repository: ChatColorSelectionRepo
 
   fun startDeletion(chatColors: ChatColors) {
     repository.getUsageCount(chatColors.id) {
-      if (it > 0) {
       internalEvents.postValue(Event.ConfirmDeletion(it, chatColors))
-      } else {
-        deleteNow(chatColors)
-      }
     }
   }
 

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

@@ -3498,6 +3498,7 @@
         <item quantity="one">This custom color is used in %1$d chat. Do you want to delete it for all chats?</item>
         <item quantity="other">This custom color is used in %1$d chats. Do you want to delete it for all chats?</item>
     </plurals>
+    <string name="ChatColorSelectionFragment__delete_chat_color">Delete chat color?</string>
 
     <!-- CustomChatColorCreatorFragment -->
     <string name="CustomChatColorCreatorFragment__solid">Solid</string>