Fixing Public chat's event order.

app/src/main/java/com/vitorpamplona/amethyst/service/NostrChannelDataSource.kt

@@ -10,22 +10,28 @@ object NostrChannelDataSource: NostrDataSource<Note>("ChatroomFeed") {
 
   fun loadMessagesBetween(channelId: String) {
     channel = LocalCache.channels[channelId]
+    resetFilters()
   }
 
-  fun createMessagesToChannelFilter() = JsonFilter(
+  fun createMessagesToChannelFilter(): JsonFilter? {
-    kinds = listOf(ChannelMessageEvent.kind),
+    if (channel != null) {
-    tags = mapOf("e" to listOf(channel?.idHex).filterNotNull()),
+      return JsonFilter(
-    limit = 100
+        kinds = listOf(ChannelMessageEvent.kind),
-  )
+        tags = mapOf("e" to listOfNotNull(channel?.idHex)),
+        since = System.currentTimeMillis() / 1000 - (60 * 60 * 24 * 1), // 24 hours
+      )
+    }
+    return null
+  }
 
   val messagesChannel = requestNewChannel()
 
   // returns the last Note of each user.
   override fun feed(): List<Note> {
-    return channel?.notes?.values?.sortedBy { it.event!!.createdAt } ?: emptyList()
+    return channel?.notes?.values?.sortedBy { it.event?.createdAt } ?: emptyList()
   }
 
   override fun updateChannelFilters() {
-    messagesChannel.filter = listOf(createMessagesToChannelFilter()).ifEmpty { null }
+    messagesChannel.filter = listOfNotNull(createMessagesToChannelFilter()).ifEmpty { null }
   }
 }

app/src/main/java/com/vitorpamplona/amethyst/service/NostrDataSource.kt

@@ -114,7 +114,6 @@ abstract class NostrDataSource<T>(val debugName: String) {
     }
   }
 
-  @OptIn(ExperimentalTime::class)
   fun loadTop(): List<T> {
     val returningList = feed().take(100)
 

app/src/main/java/com/vitorpamplona/amethyst/ui/screen/AccountStateViewModel.kt

@@ -71,7 +71,6 @@ class AccountStateViewModel(private val encryptedPreferences: EncryptedSharedPre
     NostrNotificationDataSource.account = account
     NostrChatroomListDataSource.account = account
 
-    NostrChannelDataSource.start()
     NostrAccountDataSource.start()
     NostrGlobalDataSource.start()
     NostrHomeDataSource.start()

app/src/main/java/com/vitorpamplona/amethyst/ui/screen/FeedViewModel.kt

@@ -7,7 +7,16 @@ import androidx.lifecycle.viewModelScope
 import com.vitorpamplona.amethyst.model.LocalCache
 import com.vitorpamplona.amethyst.model.LocalCacheState
 import com.vitorpamplona.amethyst.model.Note
+import com.vitorpamplona.amethyst.service.NostrChannelDataSource
+import com.vitorpamplona.amethyst.service.NostrChatRoomDataSource
+import com.vitorpamplona.amethyst.service.NostrChatroomListDataSource
 import com.vitorpamplona.amethyst.service.NostrDataSource
+import com.vitorpamplona.amethyst.service.NostrGlobalDataSource
+import com.vitorpamplona.amethyst.service.NostrHomeDataSource
+import com.vitorpamplona.amethyst.service.NostrThreadDataSource
+import com.vitorpamplona.amethyst.service.NostrUserProfileDataSource
+import com.vitorpamplona.amethyst.service.NostrUserProfileFollowersDataSource
+import com.vitorpamplona.amethyst.service.NostrUserProfileFollowsDataSource
 import kotlin.time.ExperimentalTime
 import kotlin.time.measureTimedValue
 import kotlinx.coroutines.CoroutineScope
@@ -19,8 +28,16 @@ import kotlinx.coroutines.flow.asStateFlow
 import kotlinx.coroutines.flow.update
 import kotlinx.coroutines.launch
 
+class NostrChannelFeedViewModel: FeedViewModel(NostrChannelDataSource)
+class NostrChatroomListFeedViewModel: FeedViewModel(NostrChatroomListDataSource)
+class NostrChatRoomFeedViewModel: FeedViewModel(NostrChatRoomDataSource)
+class NostrHomeFeedViewModel: FeedViewModel(NostrHomeDataSource)
+class NostrGlobalFeedViewModel: FeedViewModel(NostrGlobalDataSource)
+class NostrThreadFeedViewModel: FeedViewModel(NostrThreadDataSource)
+class NostrUserProfileFeedViewModel: FeedViewModel(NostrUserProfileDataSource)
 
-class FeedViewModel(val dataSource: NostrDataSource<Note>): ViewModel() {
+
+abstract class FeedViewModel(val dataSource: NostrDataSource<Note>): ViewModel() {
     private val _feedContent = MutableStateFlow<FeedState>(FeedState.Loading)
     val feedContent = _feedContent.asStateFlow()
 

app/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/ChannelScreen.kt

@@ -50,7 +50,7 @@ fun ChannelScreen(channelId: String?, accountViewModel: AccountViewModel, navCon
         val channelState by NostrChannelDataSource.channel!!.live.observeAsState()
         val channel = channelState?.channel ?: return
 
-        val feedViewModel: FeedViewModel = viewModel { FeedViewModel( NostrChannelDataSource ) }
+        val feedViewModel: NostrChannelFeedViewModel = viewModel()
 
         LaunchedEffect(Unit) {
             feedViewModel.refresh()

app/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/ChatroomListScreen.kt

@@ -19,7 +19,7 @@ fun ChatroomListScreen(accountViewModel: AccountViewModel, navController: NavCon
     val account by accountViewModel.accountLiveData.observeAsState()
 
     if (account != null) {
-        val feedViewModel: FeedViewModel = viewModel { FeedViewModel( NostrChatroomListDataSource ) }
+        val feedViewModel: NostrChatroomListFeedViewModel = viewModel()
 
         LaunchedEffect(Unit) {
             feedViewModel.refresh()

app/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/ChatroomScreen.kt

@@ -46,7 +46,7 @@ fun ChatroomScreen(userId: String?, accountViewModel: AccountViewModel, navContr
 
         NostrChatRoomDataSource.loadMessagesBetween(account, userId)
 
-        val feedViewModel: FeedViewModel = viewModel { FeedViewModel( NostrChatRoomDataSource ) }
+        val feedViewModel: NostrChatRoomFeedViewModel = viewModel()
 
         LaunchedEffect(Unit) {
             feedViewModel.refresh()

app/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/HomeScreen.kt

@@ -25,7 +25,7 @@ fun HomeScreen(accountViewModel: AccountViewModel, navController: NavController)
     val accountState by accountViewModel.accountLiveData.observeAsState()
 
     if (accountState != null) {
-        val feedViewModel: FeedViewModel = viewModel { FeedViewModel( NostrHomeDataSource ) }
+        val feedViewModel: NostrHomeFeedViewModel = viewModel()
 
         LaunchedEffect(Unit) {
             feedViewModel.refresh()

app/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/NotificationScreen.kt

@@ -19,8 +19,7 @@ fun NotificationScreen(accountViewModel: AccountViewModel, navController: NavCon
     val account by accountViewModel.accountLiveData.observeAsState()
 
     if (account != null) {
-        val feedViewModel: CardFeedViewModel =
+        val feedViewModel: CardFeedViewModel = viewModel { CardFeedViewModel( NostrNotificationDataSource ) }
-            viewModel { CardFeedViewModel( NostrNotificationDataSource ) }
 
         LaunchedEffect(Unit) {
             feedViewModel.refresh()

app/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/ProfileScreen.kt

@@ -222,7 +222,7 @@ fun ProfileScreen(userId: String?, accountViewModel: AccountViewModel, navContro
 fun TabNotes(user: User, accountViewModel: AccountViewModel, navController: NavController) {
     val accountState by accountViewModel.accountLiveData.observeAsState()
     if (accountState != null) {
-        val feedViewModel: FeedViewModel = viewModel { FeedViewModel( NostrUserProfileDataSource ) }
+        val feedViewModel: NostrUserProfileFeedViewModel = viewModel()
 
         Column(Modifier.fillMaxHeight()) {
             Column(

app/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/SearchScreen.kt

@@ -56,7 +56,7 @@ import com.vitorpamplona.amethyst.ui.screen.loggedIn.AccountViewModel
 
 @Composable
 fun SearchScreen(accountViewModel: AccountViewModel, navController: NavController) {
-    val feedViewModel: FeedViewModel = viewModel { FeedViewModel( NostrGlobalDataSource ) }
+    val feedViewModel: NostrGlobalFeedViewModel = viewModel()
 
     LaunchedEffect(Unit) {
         feedViewModel.refresh()

app/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/ThreadScreen.kt

@@ -27,7 +27,7 @@ fun ThreadScreen(noteId: String?, accountViewModel: AccountViewModel, navControl
     if (account != null && noteId != null) {
         NostrThreadDataSource.loadThread(noteId)
 
-        val feedViewModel: FeedViewModel = viewModel { FeedViewModel( NostrThreadDataSource ) }
+        val feedViewModel: NostrThreadFeedViewModel = viewModel()
 
         Column(Modifier.fillMaxHeight()) {
             Column(