Spam filter in new private messages

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

@@ -6,7 +6,6 @@ import com.vitorpamplona.amethyst.model.Account
 import com.vitorpamplona.amethyst.model.DefaultChannels
 import com.vitorpamplona.amethyst.model.toByteArray
 import com.vitorpamplona.amethyst.service.NostrAccountDataSource
-import com.vitorpamplona.amethyst.service.NostrChannelDataSource
 import com.vitorpamplona.amethyst.service.NostrChatroomListDataSource
 import com.vitorpamplona.amethyst.service.NostrGlobalDataSource
 import com.vitorpamplona.amethyst.service.NostrHomeDataSource

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

@@ -1,7 +1,5 @@
 package com.vitorpamplona.amethyst.ui.screen
 
-import android.os.Handler
-import android.os.Looper
 import androidx.lifecycle.ViewModel
 import androidx.lifecycle.viewModelScope
 import com.vitorpamplona.amethyst.model.LocalCache
@@ -15,10 +13,6 @@ 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
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.Job
@@ -31,21 +25,42 @@ import kotlinx.coroutines.launch
 import kotlinx.coroutines.withContext
 
 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 NostrChatroomListKnownFeedViewModel: FeedViewModel(NostrChatroomListDataSource) {
+    override fun newListFromDataSource(): List<Note> {
+        // Filter: all channels + PMs the account has replied to
+        return super.newListFromDataSource().filter {
+            val me = NostrChatroomListDataSource.account.userProfile()
+            it.channel != null || me.messages[it.author]?.firstOrNull { me == it.author } != null
+        }
+    }
+}
+class NostrChatroomListNewFeedViewModel: FeedViewModel(NostrChatroomListDataSource) {
+    override fun newListFromDataSource(): List<Note> {
+        // Filter: no channels + PMs the account has never replied to
+        return super.newListFromDataSource().filter {
+            val me = NostrChatroomListDataSource.account.userProfile()
+            it.channel == null && me.messages[it.author]?.firstOrNull { me == it.author } == null
+        }
+    }
+}
 
 abstract class FeedViewModel(val dataSource: NostrDataSource<Note>): ViewModel() {
     private val _feedContent = MutableStateFlow<FeedState>(FeedState.Loading)
     val feedContent = _feedContent.asStateFlow()
 
+    open fun newListFromDataSource(): List<Note> {
+        return dataSource.loadTop()
+    }
+
     fun refresh() {
         viewModelScope.launch(Dispatchers.IO) {
-            val notes = dataSource.loadTop()
+            val notes = newListFromDataSource()
 
             val oldNotesState = feedContent.value
             if (oldNotesState is FeedState.Loaded) {

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

@@ -3,35 +3,100 @@ package com.vitorpamplona.amethyst.ui.screen
 import androidx.compose.foundation.layout.Column
 import androidx.compose.foundation.layout.fillMaxHeight
 import androidx.compose.foundation.layout.padding
+import androidx.compose.material.MaterialTheme
+import androidx.compose.material.Tab
+import androidx.compose.material.TabRow
+import androidx.compose.material.TabRowDefaults
+import androidx.compose.material.Text
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.LaunchedEffect
 import androidx.compose.runtime.getValue
 import androidx.compose.runtime.livedata.observeAsState
+import androidx.compose.runtime.rememberCoroutineScope
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.unit.dp
 import androidx.lifecycle.viewmodel.compose.viewModel
 import androidx.navigation.NavController
-import com.vitorpamplona.amethyst.service.NostrChatroomListDataSource
+import com.google.accompanist.pager.ExperimentalPagerApi
+import com.google.accompanist.pager.HorizontalPager
+import com.google.accompanist.pager.pagerTabIndicatorOffset
+import com.google.accompanist.pager.rememberPagerState
+import com.vitorpamplona.amethyst.model.User
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.AccountViewModel
+import kotlinx.coroutines.launch
 
+@OptIn(ExperimentalPagerApi::class)
 @Composable
 fun ChatroomListScreen(accountViewModel: AccountViewModel, navController: NavController) {
     val account by accountViewModel.accountLiveData.observeAsState()
 
     if (account != null) {
-        val feedViewModel: NostrChatroomListFeedViewModel = viewModel()
-
-        LaunchedEffect(Unit) {
-            feedViewModel.refresh()
-        }
+        val pagerState = rememberPagerState()
+        val coroutineScope = rememberCoroutineScope()
 
         Column(Modifier.fillMaxHeight()) {
             Column(
                 modifier = Modifier.padding(vertical = 0.dp)
             ) {
-                ChatroomListFeedView(feedViewModel, accountViewModel, navController)
+                TabRow(
+                    selectedTabIndex = pagerState.currentPage,
+                    indicator = { tabPositions ->
+                        TabRowDefaults.Indicator(
+                            Modifier.pagerTabIndicatorOffset(pagerState, tabPositions),
+                            color = MaterialTheme.colors.primary
+                        )
+                    },
+                ) {
+                    Tab(
+                        selected = pagerState.currentPage == 0,
+                        onClick = { coroutineScope.launch { pagerState.animateScrollToPage(0) } },
+                        text = {
+                            Text(text = "Known")
+                        }
+                    )
+
+                    Tab(
+                        selected = pagerState.currentPage == 1,
+                        onClick = { coroutineScope.launch { pagerState.animateScrollToPage(1) } },
+                        text = {
+                            Text(text = "New Requests")
+                        }
+                    )
+                }
+                HorizontalPager(count = 2, state = pagerState) {
+                    when (pagerState.currentPage) {
+                        0 -> TabKnown(accountViewModel, navController)
+                        1 -> TabNew(accountViewModel, navController)
+                    }
+                }
             }
         }
     }
 }
 
+@Composable
+fun TabKnown(accountViewModel: AccountViewModel, navController: NavController) {
+    val feedViewModel: NostrChatroomListKnownFeedViewModel = viewModel()
+
+
+    Column(Modifier.fillMaxHeight()) {
+        Column(
+            modifier = Modifier.padding(vertical = 0.dp)
+        ) {
+            ChatroomListFeedView(feedViewModel, accountViewModel, navController)
+        }
+    }
+}
+
+@Composable
+fun TabNew(accountViewModel: AccountViewModel, navController: NavController) {
+    val feedViewModel: NostrChatroomListNewFeedViewModel = viewModel()
+
+    Column(Modifier.fillMaxHeight()) {
+        Column(
+            modifier = Modifier.padding(vertical = 0.dp)
+        ) {
+            ChatroomListFeedView(feedViewModel, accountViewModel, navController)
+        }
+    }
+}