List/Set management: Part 1 - Profiles.

amethyst/src/main/java/com/vitorpamplona/amethyst/model/Account.kt

@@ -35,6 +35,7 @@ import com.vitorpamplona.amethyst.BuildConfig
 import com.vitorpamplona.amethyst.service.FileHeader
 import com.vitorpamplona.amethyst.service.NostrLnZapPaymentResponseDataSource
 import com.vitorpamplona.amethyst.service.checkNotInMainThread
+import com.vitorpamplona.amethyst.ui.screen.loggedIn.lists.FollowSet
 import com.vitorpamplona.amethyst.ui.tor.TorType
 import com.vitorpamplona.ammolite.relays.Client
 import com.vitorpamplona.ammolite.relays.Constants
@@ -130,6 +131,7 @@ import kotlinx.coroutines.flow.update
 import kotlinx.coroutines.launch
 import kotlinx.coroutines.runBlocking
 import kotlinx.coroutines.suspendCancellableCoroutine
+import kotlinx.coroutines.withContext
 import kotlinx.coroutines.withTimeoutOrNull
 import java.math.BigDecimal
 import java.util.Locale
@@ -2891,6 +2893,22 @@ class Account(
         return LocalCache.getOrCreateAddressableNote(aTag)
     }
 
+    suspend fun getFollowSetNotes() =
+        withContext(Dispatchers.Default) {
+            val followSetNotes = LocalCache.getFollowSetsFor(userProfile())
+            userProfile().followSets = followSetNotes
+            println("Number of follow sets: ${followSetNotes.size}")
+        }
+
+    fun mapNoteToFollowSet(note: Note): FollowSet =
+        FollowSet
+            .mapEventToSet(
+                event = note.event as PeopleListEvent,
+                signer,
+            )
+
+    fun followSetNotesFlow() = MutableStateFlow(userProfile().followSets)
+
     fun getMuteListFlow(): StateFlow<NoteState> = getMuteListNote().flow().metadata.stateFlow
 
     fun getBlockList(): PeopleListEvent? = getBlockListNote().event as? PeopleListEvent

amethyst/src/main/java/com/vitorpamplona/amethyst/model/LocalCache.kt

@@ -2163,6 +2163,19 @@ object LocalCache {
         }
     }
 
+    fun getFollowSetsFor(user: User): List<AddressableNote> {
+        checkNotInMainThread()
+
+        return addressables
+            .filter { _, note ->
+                val listEvent = note.event
+                (
+                    listEvent is PeopleListEvent &&
+                        user.pubkeyHex == listEvent.pubKey
+                )
+            }
+    }
+
     suspend fun findStatusesForUser(user: User): ImmutableList<AddressableNote> {
         checkNotInMainThread()
 

amethyst/src/main/java/com/vitorpamplona/amethyst/model/User.kt

@@ -62,6 +62,7 @@ class User(
     var latestMetadataRelay: String? = null
     var latestContactList: ContactListEvent? = null
     var latestBookmarkList: BookmarkListEvent? = null
+    var followSets: List<AddressableNote> = listOf()
 
     var reports = mapOf<User, Set<Note>>()
         private set
@@ -470,16 +471,19 @@ class UserFlowSet(
     val metadata = UserBundledRefresherFlow(u)
     val follows = UserBundledRefresherFlow(u)
     val relays = UserBundledRefresherFlow(u)
+    val followSets = UserBundledRefresherFlow(u)
 
     fun isInUse(): Boolean =
         metadata.stateFlow.subscriptionCount.value > 0 ||
             relays.stateFlow.subscriptionCount.value > 0 ||
-            follows.stateFlow.subscriptionCount.value > 0
+            follows.stateFlow.subscriptionCount.value > 0 ||
+            followSets.stateFlow.subscriptionCount.value > 0
 
     fun destroy() {
         metadata.destroy()
         relays.destroy()
         follows.destroy()
+        followSets.destroy()
     }
 }
 

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/dal/FollowSetFeedFilter.kt

@@ -0,0 +1,48 @@
+/**
+ * Copyright (c) 2024 Vitor Pamplona
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to use,
+ * copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the
+ * Software, and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+ * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+ * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+package com.vitorpamplona.amethyst.ui.dal
+
+import android.util.Log
+import com.vitorpamplona.amethyst.model.Account
+import com.vitorpamplona.amethyst.ui.screen.loggedIn.lists.FollowSet
+import kotlinx.coroutines.launch
+import kotlin.coroutines.cancellation.CancellationException
+
+class FollowSetFeedFilter(
+    val account: Account,
+) : FeedFilter<FollowSet>() {
+    override fun feedKey(): String = account.userProfile().pubkeyHex
+
+    override fun feed(): List<FollowSet> {
+        if (account.userProfile().followSets.isEmpty()) {
+            account.scope.launch {
+                try {
+                    account.getFollowSetNotes()
+                } catch (e: Exception) {
+                    if (e is CancellationException) throw e
+                    Log.e("HiddenAccountsFeedFilter", "Failed to load follow lists: ${e.message}")
+                    null
+                }
+            }
+        }
+        return account.followSetNotesFlow().value.map { account.mapNoteToFollowSet(it) }
+    }
+}

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/navigation/AppNavigation.kt

@@ -69,6 +69,7 @@ import com.vitorpamplona.amethyst.ui.screen.loggedIn.dvms.DvmContentDiscoveryScr
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.geohash.GeoHashScreen
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.hashtag.HashtagScreen
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.home.HomeScreen
+import com.vitorpamplona.amethyst.ui.screen.loggedIn.lists.ListsScreen
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.notifications.NotificationScreen
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.profile.ProfileScreen
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.search.SearchScreen
@@ -130,6 +131,14 @@ fun AppNavigation(
                 popExitTransition = { slideOutHorizontallyToEnd },
             ) { BookmarkListScreen(accountViewModel, nav) }
 
+            composable(
+                Route.Lists.route,
+                enterTransition = { slideInHorizontallyFromEnd },
+                exitTransition = { scaleOut },
+                popEnterTransition = { scaleIn },
+                popExitTransition = { slideOutHorizontallyToEnd },
+            ) { ListsScreen(accountViewModel, nav) }
+
             composable(
                 Route.Drafts.route,
                 enterTransition = { slideInHorizontallyFromEnd },

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/navigation/DrawerContent.kt

@@ -455,6 +455,14 @@ fun ListContent(
             route = route,
         )
 
+        NavigationRow(
+            title = stringRes(Route.Lists.contentDescriptor),
+            icon = Route.Lists.icon,
+            tint = MaterialTheme.colorScheme.onBackground,
+            nav = nav,
+            route = Route.Lists.route,
+        )
+
         NavigationRow(
             title = stringRes(R.string.bookmarks),
             icon = Route.Bookmarks.icon,

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/navigation/Routes.kt

@@ -117,6 +117,13 @@ sealed class Route(
             contentDescriptor = R.string.route_home,
         )
 
+    object Lists :
+        Route(
+            route = "Lists",
+            icon = R.drawable.format_list_bulleted_type,
+            contentDescriptor = R.string.my_lists,
+        )
+
     object ContentDiscovery :
         Route(
             icon = R.drawable.ic_bookmarks,

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

@@ -43,6 +43,7 @@ import com.vitorpamplona.amethyst.ui.dal.ChatroomFeedFilter
 import com.vitorpamplona.amethyst.ui.dal.CommunityFeedFilter
 import com.vitorpamplona.amethyst.ui.dal.DraftEventsFeedFilter
 import com.vitorpamplona.amethyst.ui.dal.FeedFilter
+import com.vitorpamplona.amethyst.ui.dal.FollowSetFeedFilter
 import com.vitorpamplona.amethyst.ui.dal.GeoHashFeedFilter
 import com.vitorpamplona.amethyst.ui.dal.HashtagFeedFilter
 import com.vitorpamplona.amethyst.ui.dal.NIP90ContentDiscoveryResponseFilter
@@ -56,6 +57,7 @@ import com.vitorpamplona.amethyst.ui.dal.UserProfileReportsFeedFilter
 import com.vitorpamplona.amethyst.ui.feeds.FeedContentState
 import com.vitorpamplona.amethyst.ui.feeds.FeedState
 import com.vitorpamplona.amethyst.ui.feeds.InvalidatableContent
+import com.vitorpamplona.amethyst.ui.screen.loggedIn.lists.FollowSetFeedViewModel
 import com.vitorpamplona.quartz.events.ChatroomKey
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.ExperimentalCoroutinesApi
@@ -231,6 +233,16 @@ class NostrBookmarkPrivateFeedViewModel(
     }
 }
 
+class NostrUserFollowSetFeedViewModel(
+    val account: Account,
+) : FollowSetFeedViewModel(FollowSetFeedFilter(account)) {
+    class Factory(
+        val account: Account,
+    ) : ViewModelProvider.Factory {
+        override fun <NostrUserFollowSetFeedViewModel : ViewModel> create(modelClass: Class<NostrUserFollowSetFeedViewModel>): NostrUserFollowSetFeedViewModel = NostrUserFollowSetFeedViewModel(account) as NostrUserFollowSetFeedViewModel
+    }
+}
+
 @Stable
 class NostrNIP90ContentDiscoveryFeedViewModel(
     val account: Account,