🎯 Goal

Fix "MessageTopBar Preview is broken" issue #192

🛠 Implementation details

@Composable WhatsAppMessageTopBar takes WhatsAppMessagesViewModel as a parameter and since we cannot instantiate ViewModel in Previews, it doesn't render the Preview.

Before

After

✍️ Explain examples

Setup a callback to trigger a function in ViewModel instead (takes videoCall flag as a param to be passed onto VM).

@Composable
fun WhatsAppMessageTopBar(
  .
  navigateToVideoCall: (Boolean) -> Unit,
  .
)