Notify about broken source on list screen

app/src/main/kotlin/org/koitharu/kotatsu/remotelist/ui/RemoteListFragment.kt

@@ -29,7 +29,7 @@ import org.koitharu.kotatsu.parsers.model.MangaSource
 import org.koitharu.kotatsu.search.domain.SearchKind
 
 @AndroidEntryPoint
-class RemoteListFragment : MangaListFragment(), FilterCoordinator.Owner {
+class RemoteListFragment : MangaListFragment(), FilterCoordinator.Owner, View.OnClickListener {
 
     override val viewModel by viewModels<RemoteListViewModel>()
 
@@ -42,6 +42,7 @@ class RemoteListFragment : MangaListFragment(), FilterCoordinator.Owner {
         addMenuProvider(MangaSearchMenuProvider(filterCoordinator, viewModel))
         viewModel.isRandomLoading.observe(viewLifecycleOwner, MenuInvalidator(requireActivity()))
         viewModel.onOpenManga.observeEvent(viewLifecycleOwner) { router.openDetails(it) }
+        viewModel.onSourceBroken.observeEvent(viewLifecycleOwner) { showSourceBrokenWarning() }
         filterCoordinator.observe().distinctUntilChangedBy { it.listFilter.isEmpty() }
             .drop(1)
             .observe(viewLifecycleOwner) {
@@ -87,6 +88,8 @@ class RemoteListFragment : MangaListFragment(), FilterCoordinator.Owner {
         openInBrowser(error.getCauseUrl())
     }
 
+    override fun onClick(v: View?) = Unit // from Snackbar, do nothing
+
     private fun openInBrowser(url: String?) {
         if (url?.isHttpUrl() == true) {
             router.openBrowser(
@@ -100,6 +103,16 @@ class RemoteListFragment : MangaListFragment(), FilterCoordinator.Owner {
         }
     }
 
+    private fun showSourceBrokenWarning() {
+        val snackbar = Snackbar.make(
+            viewBinding?.recyclerView ?: return,
+            R.string.source_broken_warning,
+            Snackbar.LENGTH_INDEFINITE,
+        )
+        snackbar.setAction(R.string.got_it, this)
+        snackbar.show()
+    }
+
     private inner class RemoteListMenuProvider : MenuProvider {
 
         override fun onCreateMenu(menu: Menu, menuInflater: MenuInflater) {

app/src/main/kotlin/org/koitharu/kotatsu/remotelist/ui/RemoteListViewModel.kt

@@ -44,6 +44,7 @@ import org.koitharu.kotatsu.list.ui.model.toErrorState
 import org.koitharu.kotatsu.local.data.LocalStorageChanges
 import org.koitharu.kotatsu.local.domain.model.LocalManga
 import org.koitharu.kotatsu.parsers.model.Manga
+import org.koitharu.kotatsu.parsers.model.MangaParserSource
 import org.koitharu.kotatsu.parsers.util.sizeOrZero
 import javax.inject.Inject
 
@@ -65,6 +66,7 @@ open class RemoteListViewModel @Inject constructor(
 	val source = MangaSource(savedStateHandle[RemoteListFragment.ARG_SOURCE])
 	val isRandomLoading = MutableStateFlow(false)
 	val onOpenManga = MutableEventFlow<Manga>()
+    val onSourceBroken = MutableEventFlow<Unit>()
 
 	protected val repository = mangaRepositoryFactory.create(source)
 	private val mangaList = MutableStateFlow<List<Manga>?>(null)
@@ -117,6 +119,11 @@ open class RemoteListViewModel @Inject constructor(
 		launchJob(Dispatchers.Default) {
 			sourcesRepository.trackUsage(source)
 		}
+
+        if (source is MangaParserSource && source.isBroken) {
+            // Just notify one. Will show reason in future
+            onSourceBroken.call(Unit)
+        }
 	}
 
 	override fun onRefresh() {

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

@@ -899,4 +899,5 @@
     <string name="create_or_restore_backup">Create or restore a backup</string>
     <string name="data_removal">Data removal</string>
     <string name="privacy">Privacy</string>
+    <string name="source_broken_warning">This manga source has been marked as broken. Some features may not work</string>
 </resources>