feat: Add standalone Products screen with own filters and Around Me default

Extracts the Marketplace/Products functionality from the Discovery tab
into a dedicated standalone screen following the Pictures/Polls pattern.
The screen displays NIP-99 classifieds in a 2-column grid with its own
filter system, defaulting to Around Me (geolocation-based) filtering.

https://claude.ai/code/session_01PyrUZzSj7A3ZXucs7DTYbB

amethyst/src/main/java/com/vitorpamplona/amethyst/LocalPreferences.kt

@@ -101,6 +101,7 @@ private object PrefKeys {
     const val DEFAULT_DISCOVERY_FOLLOW_LIST = "defaultDiscoveryFollowList"
     const val DEFAULT_POLLS_FOLLOW_LIST = "defaultPollsFollowList"
     const val DEFAULT_PICTURES_FOLLOW_LIST = "defaultPicturesFollowList"
+    const val DEFAULT_PRODUCTS_FOLLOW_LIST = "defaultProductsFollowList"
     const val DEFAULT_SHORTS_FOLLOW_LIST = "defaultShortsFollowList"
     const val DEFAULT_LONGS_FOLLOW_LIST = "defaultLongsFollowList"
     const val ZAP_PAYMENT_REQUEST_SERVER = "zapPaymentServer" // legacy, kept for migration
@@ -344,6 +345,7 @@ object LocalPreferences {
 
                     putString(PrefKeys.DEFAULT_POLLS_FOLLOW_LIST, JsonMapper.toJson(settings.defaultPollsFollowList.value))
                     putString(PrefKeys.DEFAULT_PICTURES_FOLLOW_LIST, JsonMapper.toJson(settings.defaultPicturesFollowList.value))
+                    putString(PrefKeys.DEFAULT_PRODUCTS_FOLLOW_LIST, JsonMapper.toJson(settings.defaultProductsFollowList.value))
                     putString(PrefKeys.DEFAULT_SHORTS_FOLLOW_LIST, JsonMapper.toJson(settings.defaultShortsFollowList.value))
                     putString(PrefKeys.DEFAULT_LONGS_FOLLOW_LIST, JsonMapper.toJson(settings.defaultLongsFollowList.value))
 
@@ -509,6 +511,7 @@ object LocalPreferences {
 
                     val defaultPollsFollowListStr = getString(PrefKeys.DEFAULT_POLLS_FOLLOW_LIST, null)
                     val defaultPicturesFollowListStr = getString(PrefKeys.DEFAULT_PICTURES_FOLLOW_LIST, null)
+                    val defaultProductsFollowListStr = getString(PrefKeys.DEFAULT_PRODUCTS_FOLLOW_LIST, null)
                     val defaultShortsFollowListStr = getString(PrefKeys.DEFAULT_SHORTS_FOLLOW_LIST, null)
                     val defaultLongsFollowListStr = getString(PrefKeys.DEFAULT_LONGS_FOLLOW_LIST, null)
 
@@ -548,6 +551,7 @@ object LocalPreferences {
 
                     val defaultPollsFollowList = async { parseOrNull<TopFilter>(defaultPollsFollowListStr) ?: TopFilter.Global }
                     val defaultPicturesFollowList = async { parseOrNull<TopFilter>(defaultPicturesFollowListStr) ?: TopFilter.Global }
+                    val defaultProductsFollowList = async { parseOrNull<TopFilter>(defaultProductsFollowListStr) ?: TopFilter.AroundMe }
                     val defaultShortsFollowList = async { parseOrNull<TopFilter>(defaultShortsFollowListStr) ?: TopFilter.Global }
                     val defaultLongsFollowList = async { parseOrNull<TopFilter>(defaultLongsFollowListStr) ?: TopFilter.Global }
 
@@ -623,6 +627,7 @@ object LocalPreferences {
                         defaultDiscoveryFollowList = MutableStateFlow(defaultDiscoveryFollowList.await()),
                         defaultPollsFollowList = MutableStateFlow(defaultPollsFollowList.await()),
                         defaultPicturesFollowList = MutableStateFlow(defaultPicturesFollowList.await()),
+                        defaultProductsFollowList = MutableStateFlow(defaultProductsFollowList.await()),
                         defaultShortsFollowList = MutableStateFlow(defaultShortsFollowList.await()),
                         defaultLongsFollowList = MutableStateFlow(defaultLongsFollowList.await()),
                         nwcWallets = MutableStateFlow(nwcWalletsLoaded.await().first),

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

@@ -435,6 +435,9 @@ class Account(
     val livePicturesFollowLists: StateFlow<IFeedTopNavFilter> = topNavFilterFlow(settings.defaultPicturesFollowList)
     val livePicturesFollowListsPerRelay = OutboxLoaderState(livePicturesFollowLists, cache, scope).flow
 
+    val liveProductsFollowLists: StateFlow<IFeedTopNavFilter> = topNavFilterFlow(settings.defaultProductsFollowList)
+    val liveProductsFollowListsPerRelay = OutboxLoaderState(liveProductsFollowLists, cache, scope).flow
+
     val liveShortsFollowLists: StateFlow<IFeedTopNavFilter> = topNavFilterFlow(settings.defaultShortsFollowList)
     val liveShortsFollowListsPerRelay = OutboxLoaderState(liveShortsFollowLists, cache, scope).flow
 

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

@@ -169,6 +169,7 @@ class AccountSettings(
     val defaultDiscoveryFollowList: MutableStateFlow<TopFilter> = MutableStateFlow(TopFilter.Global),
     val defaultPollsFollowList: MutableStateFlow<TopFilter> = MutableStateFlow(TopFilter.Global),
     val defaultPicturesFollowList: MutableStateFlow<TopFilter> = MutableStateFlow(TopFilter.Global),
+    val defaultProductsFollowList: MutableStateFlow<TopFilter> = MutableStateFlow(TopFilter.AroundMe),
     val defaultShortsFollowList: MutableStateFlow<TopFilter> = MutableStateFlow(TopFilter.Global),
     val defaultLongsFollowList: MutableStateFlow<TopFilter> = MutableStateFlow(TopFilter.Global),
     val nwcWallets: MutableStateFlow<List<NwcWalletEntryNorm>> = MutableStateFlow(emptyList()),
@@ -455,6 +456,17 @@ class AccountSettings(
         }
     }
 
+    fun changeDefaultProductsFollowList(name: FeedDefinition) {
+        changeDefaultProductsFollowList(name.code)
+    }
+
+    fun changeDefaultProductsFollowList(name: TopFilter) {
+        if (defaultProductsFollowList.value != name) {
+            defaultProductsFollowList.tryEmit(name)
+            saveAccountSettings()
+        }
+    }
+
     fun changeDefaultShortsFollowList(name: FeedDefinition) {
         changeDefaultShortsFollowList(name.code)
     }

amethyst/src/main/java/com/vitorpamplona/amethyst/service/relayClient/reqCommand/RelaySubscriptionsCoordinator.kt

@@ -39,6 +39,7 @@ import com.vitorpamplona.amethyst.ui.screen.loggedIn.hashtag.datasource.HashtagF
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.home.datasource.HomeFilterAssembler
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.longs.datasource.LongsFilterAssembler
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.pictures.datasource.PicturesFilterAssembler
+import com.vitorpamplona.amethyst.ui.screen.loggedIn.products.datasource.ProductsFilterAssembler
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.polls.datasource.PollsFilterAssembler
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.profile.datasource.UserProfileFilterAssembler
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.relay.datasource.RelayFeedFilterAssembler
@@ -91,6 +92,7 @@ class RelaySubscriptionsCoordinator(
 
     val polls = PollsFilterAssembler(client)
     val pictures = PicturesFilterAssembler(client)
+    val products = ProductsFilterAssembler(client)
     val shorts = ShortsFilterAssembler(client)
     val longs = LongsFilterAssembler(client)
 
@@ -106,6 +108,7 @@ class RelaySubscriptionsCoordinator(
             discovery,
             polls,
             pictures,
+            products,
             shorts,
             longs,
             channelFinder,

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/feeds/RememberForeverStates.kt

@@ -59,6 +59,7 @@ object ScrollStateKeys {
     const val POLLS_OPEN = "PollsOpenFeed"
     const val POLLS_CLOSED = "PollsClosedFeed"
     const val PICTURES_SCREEN = "PicturesFeed"
+    const val PRODUCTS_SCREEN = "ProductsFeed"
     const val SHORTS_SCREEN = "ShortsFeed"
     const val LONGS_SCREEN = "LongsFeed"
 

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

@@ -117,6 +117,7 @@ import com.vitorpamplona.amethyst.ui.screen.loggedIn.newUser.ImportFollowListSel
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.notifications.NotificationScreen
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.notifications.publicMessages.NewPublicMessageScreen
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.pictures.PicturesScreen
+import com.vitorpamplona.amethyst.ui.screen.loggedIn.products.ProductsScreen
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.pinnednotes.PinnedNotesScreen
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.polls.PollPostScreen
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.polls.PollsScreen
@@ -220,6 +221,7 @@ fun BuildNavigation(
         composableArgs<Route.Notification> { NotificationScreen(it.scrollToEventId, accountViewModel, nav) }
         composableFromEnd<Route.Polls> { PollsScreen(accountViewModel, nav) }
         composableFromEnd<Route.Pictures> { PicturesScreen(accountViewModel, nav) }
+        composableFromEnd<Route.Products> { ProductsScreen(accountViewModel, nav) }
         composableFromEnd<Route.Shorts> { ShortsScreen(accountViewModel, nav) }
         composableFromEnd<Route.Longs> { LongsScreen(accountViewModel, nav) }
         composableFromEnd<Route.NewHlsVideo> { NewHlsVideoScreen(accountViewModel, nav) }

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

@@ -63,6 +63,7 @@ import androidx.compose.material.icons.outlined.PlayCircle
 import androidx.compose.material.icons.outlined.Settings
 import androidx.compose.material.icons.outlined.SettingsInputAntenna
 import androidx.compose.material.icons.outlined.SmartDisplay
+import androidx.compose.material.icons.outlined.Storefront
 import androidx.compose.material3.HorizontalDivider
 import androidx.compose.material3.Icon
 import androidx.compose.material3.IconButton
@@ -592,6 +593,14 @@ fun ListContent(
             route = Route.Pictures,
         )
 
+        NavigationRow(
+            title = R.string.discover_marketplace,
+            icon = Icons.Outlined.Storefront,
+            tint = MaterialTheme.colorScheme.onBackground,
+            nav = nav,
+            route = Route.Products,
+        )
+
         NavigationRow(
             title = R.string.shorts,
             icon = Icons.Outlined.PlayCircle,

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

@@ -47,6 +47,8 @@ sealed class Route {
 
     @Serializable object Pictures : Route()
 
+    @Serializable object Products : Route()
+
     @Serializable object Shorts : Route()
 
     @Serializable object Longs : Route()

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

@@ -47,6 +47,7 @@ import com.vitorpamplona.amethyst.ui.screen.loggedIn.notifications.OpenPollsStat
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.notifications.dal.NotificationFeedFilter
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.pictures.dal.PictureFeedFilter
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.polls.dal.ClosedPollsFeedFilter
+import com.vitorpamplona.amethyst.ui.screen.loggedIn.products.dal.ProductsFeedFilter
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.polls.dal.OpenPollsFeedFilter
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.polls.dal.PollsFeedFilter
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.shorts.dal.ShortsFeedFilter
@@ -80,6 +81,7 @@ class AccountFeedContentStates(
     val closedPollsFeed = FeedContentState(ClosedPollsFeedFilter(account), scope, LocalCache)
 
     val picturesFeed = FeedContentState(PictureFeedFilter(account), scope, LocalCache)
+    val productsFeed = FeedContentState(ProductsFeedFilter(account), scope, LocalCache)
     val shortsFeed = FeedContentState(ShortsFeedFilter(account), scope, LocalCache)
     val longsFeed = FeedContentState(LongsFeedFilter(account), scope, LocalCache)
 
@@ -122,6 +124,7 @@ class AccountFeedContentStates(
         closedPollsFeed.updateFeedWith(newNotes)
 
         picturesFeed.updateFeedWith(newNotes)
+        productsFeed.updateFeedWith(newNotes)
         shortsFeed.updateFeedWith(newNotes)
         longsFeed.updateFeedWith(newNotes)
 
@@ -158,6 +161,7 @@ class AccountFeedContentStates(
         closedPollsFeed.deleteFromFeed(newNotes)
 
         picturesFeed.deleteFromFeed(newNotes)
+        productsFeed.deleteFromFeed(newNotes)
         shortsFeed.deleteFromFeed(newNotes)
         longsFeed.deleteFromFeed(newNotes)
 

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/products/NewProductButton.kt

@@ -0,0 +1,59 @@
+/*
+ * Copyright (c) 2025 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.screen.loggedIn.products
+
+import androidx.compose.foundation.shape.CircleShape
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.outlined.Add
+import androidx.compose.material3.FloatingActionButton
+import androidx.compose.material3.Icon
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.graphics.Color
+import com.vitorpamplona.amethyst.R
+import com.vitorpamplona.amethyst.ui.navigation.navs.INav
+import com.vitorpamplona.amethyst.ui.navigation.routes.Route
+import com.vitorpamplona.amethyst.ui.screen.loggedIn.AccountViewModel
+import com.vitorpamplona.amethyst.ui.stringRes
+import com.vitorpamplona.amethyst.ui.theme.Size26Modifier
+import com.vitorpamplona.amethyst.ui.theme.Size55Modifier
+
+@Composable
+fun NewProductButton(
+    accountViewModel: AccountViewModel,
+    nav: INav,
+) {
+    FloatingActionButton(
+        onClick = {
+            nav.nav(Route.NewProduct())
+        },
+        modifier = Size55Modifier,
+        shape = CircleShape,
+        containerColor = MaterialTheme.colorScheme.primary,
+    ) {
+        Icon(
+            imageVector = Icons.Outlined.Add,
+            contentDescription = stringRes(id = R.string.new_product),
+            modifier = Size26Modifier,
+            tint = Color.White,
+        )
+    }
+}

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/products/ProductsFeedLoaded.kt

@@ -0,0 +1,121 @@
+/*
+ * Copyright (c) 2025 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.screen.loggedIn.products
+
+import androidx.compose.animation.core.tween
+import androidx.compose.foundation.ExperimentalFoundationApi
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.lazy.grid.GridCells
+import androidx.compose.foundation.lazy.grid.LazyGridState
+import androidx.compose.foundation.lazy.grid.LazyVerticalGrid
+import androidx.compose.foundation.lazy.grid.itemsIndexed
+import androidx.compose.material3.HorizontalDivider
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.getValue
+import androidx.compose.ui.Modifier
+import androidx.lifecycle.compose.collectAsStateWithLifecycle
+import com.vitorpamplona.amethyst.commons.ui.feeds.FeedContentState
+import com.vitorpamplona.amethyst.commons.ui.feeds.FeedState
+import com.vitorpamplona.amethyst.ui.actions.CrossfadeIfEnabled
+import com.vitorpamplona.amethyst.ui.feeds.FeedEmpty
+import com.vitorpamplona.amethyst.ui.feeds.FeedError
+import com.vitorpamplona.amethyst.ui.feeds.LoadingFeed
+import com.vitorpamplona.amethyst.ui.navigation.navs.INav
+import com.vitorpamplona.amethyst.ui.screen.loggedIn.AccountViewModel
+import com.vitorpamplona.amethyst.ui.screen.loggedIn.discover.ChannelCardCompose
+import com.vitorpamplona.amethyst.ui.theme.DividerThickness
+import com.vitorpamplona.amethyst.ui.theme.FeedPadding
+import com.vitorpamplona.quartz.nip99Classifieds.ClassifiedsEvent
+
+@Composable
+fun RenderProductsFeed(
+    feedContentState: FeedContentState,
+    gridState: LazyGridState,
+    accountViewModel: AccountViewModel,
+    nav: INav,
+) {
+    val feedState by feedContentState.feedContent.collectAsStateWithLifecycle()
+
+    CrossfadeIfEnabled(
+        targetState = feedState,
+        animationSpec = tween(durationMillis = 100),
+        label = "RenderProductsFeed",
+        accountViewModel = accountViewModel,
+    ) { state ->
+        when (state) {
+            is FeedState.Empty -> {
+                FeedEmpty(feedContentState::invalidateData)
+            }
+
+            is FeedState.FeedError -> {
+                FeedError(state.errorMessage, feedContentState::invalidateData)
+            }
+
+            is FeedState.Loaded -> {
+                ProductsFeedColumnsLoaded(
+                    state,
+                    gridState,
+                    accountViewModel,
+                    nav,
+                )
+            }
+
+            is FeedState.Loading -> {
+                LoadingFeed()
+            }
+        }
+    }
+}
+
+@OptIn(ExperimentalFoundationApi::class)
+@Composable
+private fun ProductsFeedColumnsLoaded(
+    loaded: FeedState.Loaded,
+    listState: LazyGridState,
+    accountViewModel: AccountViewModel,
+    nav: INav,
+) {
+    val items by loaded.feed.collectAsStateWithLifecycle()
+
+    LazyVerticalGrid(
+        columns = GridCells.Fixed(2),
+        contentPadding = FeedPadding,
+        state = listState,
+    ) {
+        itemsIndexed(items.list, key = { _, item -> item.idHex }) { _, item ->
+            Row(Modifier.fillMaxWidth().animateItem()) {
+                ChannelCardCompose(
+                    baseNote = item,
+                    routeForLastRead = "ProductsFeed",
+                    modifier = Modifier,
+                    forceEventKind = ClassifiedsEvent.KIND,
+                    accountViewModel = accountViewModel,
+                    nav = nav,
+                )
+            }
+
+            HorizontalDivider(
+                thickness = DividerThickness,
+            )
+        }
+    }
+}

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/products/ProductsScreen.kt

@@ -0,0 +1,111 @@
+/*
+ * Copyright (c) 2025 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.screen.loggedIn.products
+
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.padding
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.LaunchedEffect
+import androidx.compose.runtime.getValue
+import androidx.compose.ui.Modifier
+import androidx.lifecycle.compose.collectAsStateWithLifecycle
+import com.vitorpamplona.amethyst.commons.ui.feeds.FeedContentState
+import com.vitorpamplona.amethyst.ui.feeds.RefresheableBox
+import com.vitorpamplona.amethyst.ui.feeds.SaveableGridFeedContentState
+import com.vitorpamplona.amethyst.ui.feeds.ScrollStateKeys
+import com.vitorpamplona.amethyst.ui.feeds.WatchLifecycleAndUpdateModel
+import com.vitorpamplona.amethyst.ui.layouts.DisappearingScaffold
+import com.vitorpamplona.amethyst.ui.navigation.bottombars.AppBottomBar
+import com.vitorpamplona.amethyst.ui.navigation.navs.INav
+import com.vitorpamplona.amethyst.ui.navigation.routes.Route
+import com.vitorpamplona.amethyst.ui.screen.loggedIn.AccountViewModel
+import com.vitorpamplona.amethyst.ui.screen.loggedIn.products.datasource.ProductsFilterAssemblerSubscription
+
+@Composable
+fun ProductsScreen(
+    accountViewModel: AccountViewModel,
+    nav: INav,
+) {
+    ProductsScreen(
+        productsFeedContentState = accountViewModel.feedStates.productsFeed,
+        accountViewModel = accountViewModel,
+        nav = nav,
+    )
+}
+
+@Composable
+fun ProductsScreen(
+    productsFeedContentState: FeedContentState,
+    accountViewModel: AccountViewModel,
+    nav: INav,
+) {
+    WatchLifecycleAndUpdateModel(productsFeedContentState)
+    WatchAccountForProductsScreen(productsFeedContentState = productsFeedContentState, accountViewModel = accountViewModel)
+    ProductsFilterAssemblerSubscription(accountViewModel)
+
+    DisappearingScaffold(
+        isInvertedLayout = false,
+        topBar = {
+            ProductsTopBar(accountViewModel, nav)
+        },
+        bottomBar = {
+            AppBottomBar(Route.Products, accountViewModel) { route ->
+                if (route == Route.Products) {
+                    productsFeedContentState.sendToTop()
+                } else {
+                    nav.newStack(route)
+                }
+            }
+        },
+        floatingButton = {
+            NewProductButton(accountViewModel, nav)
+        },
+        accountViewModel = accountViewModel,
+    ) { paddingValues ->
+        Column(Modifier.padding(paddingValues)) {
+            RefresheableBox(productsFeedContentState, true) {
+                SaveableGridFeedContentState(productsFeedContentState, scrollStateKey = ScrollStateKeys.PRODUCTS_SCREEN) { gridState ->
+                    RenderProductsFeed(
+                        feedContentState = productsFeedContentState,
+                        gridState = gridState,
+                        accountViewModel = accountViewModel,
+                        nav = nav,
+                    )
+                }
+            }
+        }
+    }
+}
+
+@Composable
+fun WatchAccountForProductsScreen(
+    productsFeedContentState: FeedContentState,
+    accountViewModel: AccountViewModel,
+) {
+    val listState by accountViewModel.account.liveProductsFollowLists.collectAsStateWithLifecycle()
+    val hiddenUsers =
+        accountViewModel.account.hiddenUsers.flow
+            .collectAsStateWithLifecycle()
+
+    LaunchedEffect(accountViewModel, listState, hiddenUsers) {
+        productsFeedContentState.checkKeysInvalidateDataAndSendToTop()
+    }
+}

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/products/ProductsTopBar.kt

@@ -0,0 +1,70 @@
+/*
+ * Copyright (c) 2025 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.screen.loggedIn.products
+
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.getValue
+import androidx.lifecycle.compose.collectAsStateWithLifecycle
+import com.vitorpamplona.amethyst.R
+import com.vitorpamplona.amethyst.model.TopFilter
+import com.vitorpamplona.amethyst.ui.navigation.navs.INav
+import com.vitorpamplona.amethyst.ui.navigation.topbars.FeedFilterSpinner
+import com.vitorpamplona.amethyst.ui.navigation.topbars.UserDrawerSearchTopBar
+import com.vitorpamplona.amethyst.ui.screen.FeedDefinition
+import com.vitorpamplona.amethyst.ui.screen.TopNavFilterState
+import com.vitorpamplona.amethyst.ui.screen.loggedIn.AccountViewModel
+import com.vitorpamplona.amethyst.ui.stringRes
+
+@Composable
+fun ProductsTopBar(
+    accountViewModel: AccountViewModel,
+    nav: INav,
+) {
+    UserDrawerSearchTopBar(accountViewModel, nav) {
+        val list by accountViewModel.account.settings.defaultProductsFollowList
+            .collectAsStateWithLifecycle()
+
+        ProductsTopNavFilterBar(
+            followListsModel = accountViewModel.feedStates.feedListOptions,
+            listName = list,
+            accountViewModel = accountViewModel,
+            onChange = accountViewModel.account.settings::changeDefaultProductsFollowList,
+        )
+    }
+}
+
+@Composable
+private fun ProductsTopNavFilterBar(
+    followListsModel: TopNavFilterState,
+    listName: TopFilter,
+    accountViewModel: AccountViewModel,
+    onChange: (FeedDefinition) -> Unit,
+) {
+    val allLists by followListsModel.kind3GlobalPeople.collectAsStateWithLifecycle()
+
+    FeedFilterSpinner(
+        placeholderCode = listName,
+        explainer = stringRes(R.string.select_list_to_filter),
+        options = allLists,
+        onSelect = { onChange(allLists.getOrNull(it) ?: followListsModel.allFollows) },
+        accountViewModel = accountViewModel,
+    )
+}

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/products/dal/ProductsFeedFilter.kt

@@ -0,0 +1,79 @@
+/*
+ * Copyright (c) 2025 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.screen.loggedIn.products.dal
+
+import com.vitorpamplona.amethyst.model.Account
+import com.vitorpamplona.amethyst.model.LocalCache
+import com.vitorpamplona.amethyst.model.Note
+import com.vitorpamplona.amethyst.model.TopFilter
+import com.vitorpamplona.amethyst.model.filterIntoSet
+import com.vitorpamplona.amethyst.ui.dal.AdditiveFeedFilter
+import com.vitorpamplona.amethyst.ui.dal.FilterByListParams
+import com.vitorpamplona.quartz.nip99Classifieds.ClassifiedsEvent
+
+class ProductsFeedFilter(
+    val account: Account,
+) : AdditiveFeedFilter<Note>() {
+    override fun feedKey(): String = account.userProfile().pubkeyHex + "-" + followList().code
+
+    override fun limit() = 200
+
+    fun followList(): TopFilter = account.settings.defaultProductsFollowList.value
+
+    fun TopFilter.isMuteList() = this is TopFilter.MuteList
+
+    fun TopFilter.isBlockList() = this is TopFilter.PeopleList && this.address == account.blockPeopleList.getBlockListAddress()
+
+    fun TopFilter.wantsToSeeNegativeStuff() = isMuteList() || isBlockList()
+
+    override fun showHiddenKey(): Boolean = followList().wantsToSeeNegativeStuff()
+
+    override fun feed(): List<Note> {
+        val params = buildFilterParams(account)
+
+        val notes =
+            LocalCache.addressables.filterIntoSet(ClassifiedsEvent.KIND) { _, it ->
+                val noteEvent = it.event
+                noteEvent is ClassifiedsEvent && noteEvent.isWellFormed() && params.match(noteEvent, it.relays)
+            }
+
+        return sort(notes)
+    }
+
+    override fun applyFilter(newItems: Set<Note>): Set<Note> = innerApplyFilter(newItems)
+
+    fun buildFilterParams(account: Account): FilterByListParams =
+        FilterByListParams.create(
+            account.liveProductsFollowLists.value,
+            account.hiddenUsers.flow.value,
+        )
+
+    private fun innerApplyFilter(collection: Collection<Note>): Set<Note> {
+        val params = buildFilterParams(account)
+
+        return collection.filterTo(HashSet()) {
+            val noteEvent = it.event
+            noteEvent is ClassifiedsEvent && noteEvent.isWellFormed() && params.match(noteEvent, it.relays)
+        }
+    }
+
+    override fun sort(items: Set<Note>): List<Note> = items.sortedWith(compareByDescending<Note> { it.createdAt() }.thenBy { it.idHex })
+}

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/products/datasource/ProductsFilterAssembler.kt

@@ -0,0 +1,50 @@
+/*
+ * Copyright (c) 2025 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.screen.loggedIn.products.datasource
+
+import androidx.compose.runtime.Stable
+import com.vitorpamplona.amethyst.commons.relayClient.composeSubscriptionManagers.ComposeSubscriptionManager
+import com.vitorpamplona.amethyst.model.Account
+import com.vitorpamplona.amethyst.ui.screen.loggedIn.AccountFeedContentStates
+import com.vitorpamplona.quartz.nip01Core.relay.client.INostrClient
+import kotlinx.coroutines.CoroutineScope
+
+class ProductsQueryState(
+    val account: Account,
+    val feedStates: AccountFeedContentStates,
+    val scope: CoroutineScope,
+)
+
+@Stable
+class ProductsFilterAssembler(
+    client: INostrClient,
+) : ComposeSubscriptionManager<ProductsQueryState>() {
+    val group =
+        listOf(
+            ProductsSubAssembler(client, ::allKeys),
+        )
+
+    override fun invalidateKeys() = invalidateFilters()
+
+    override fun invalidateFilters() = group.forEach { it.invalidateFilters() }
+
+    override fun destroy() = group.forEach { it.destroy() }
+}

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/products/datasource/ProductsFilterAssemblerSubscription.kt

@@ -0,0 +1,48 @@
+/*
+ * Copyright (c) 2025 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.screen.loggedIn.products.datasource
+
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.remember
+import androidx.lifecycle.viewModelScope
+import com.vitorpamplona.amethyst.commons.relayClient.subscriptions.KeyDataSourceSubscription
+import com.vitorpamplona.amethyst.ui.screen.loggedIn.AccountViewModel
+
+@Composable
+fun ProductsFilterAssemblerSubscription(accountViewModel: AccountViewModel) {
+    ProductsFilterAssemblerSubscription(
+        accountViewModel.dataSources().products,
+        accountViewModel,
+    )
+}
+
+@Composable
+fun ProductsFilterAssemblerSubscription(
+    dataSource: ProductsFilterAssembler,
+    accountViewModel: AccountViewModel,
+) {
+    val state =
+        remember(accountViewModel.account) {
+            ProductsQueryState(accountViewModel.account, accountViewModel.feedStates, accountViewModel.viewModelScope)
+        }
+
+    KeyDataSourceSubscription(state, dataSource)
+}

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/products/datasource/ProductsSubAssembler.kt

@@ -0,0 +1,98 @@
+/*
+ * Copyright (c) 2025 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.screen.loggedIn.products.datasource
+
+import com.vitorpamplona.amethyst.model.TopFilter
+import com.vitorpamplona.amethyst.model.User
+import com.vitorpamplona.amethyst.service.relayClient.eoseManagers.PerUserAndFollowListEoseManager
+import com.vitorpamplona.amethyst.service.relays.SincePerRelayMap
+import com.vitorpamplona.amethyst.ui.screen.loggedIn.discover.nip99Classifieds.makeClassifiedsFilter
+import com.vitorpamplona.quartz.nip01Core.relay.client.INostrClient
+import com.vitorpamplona.quartz.nip01Core.relay.client.pool.RelayBasedFilter
+import com.vitorpamplona.quartz.nip01Core.relay.client.subscriptions.Subscription
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.FlowPreview
+import kotlinx.coroutines.Job
+import kotlinx.coroutines.flow.collectLatest
+import kotlinx.coroutines.flow.sample
+import kotlinx.coroutines.launch
+
+class ProductsSubAssembler(
+    client: INostrClient,
+    allKeys: () -> Set<ProductsQueryState>,
+) : PerUserAndFollowListEoseManager<ProductsQueryState, TopFilter>(client, allKeys) {
+    override fun updateFilter(
+        key: ProductsQueryState,
+        since: SincePerRelayMap?,
+    ): List<RelayBasedFilter> {
+        val feedSettings = key.followsPerRelay()
+
+        return makeClassifiedsFilter(feedSettings, since, key.feedStates.productsFeed.lastNoteCreatedAtIfFilled())
+    }
+
+    override fun user(key: ProductsQueryState) = key.account.userProfile()
+
+    override fun list(key: ProductsQueryState) = key.listName()
+
+    fun ProductsQueryState.listNameFlow() = account.settings.defaultProductsFollowList
+
+    fun ProductsQueryState.listName() = listNameFlow().value
+
+    fun ProductsQueryState.followsPerRelayFlow() = account.liveProductsFollowListsPerRelay
+
+    fun ProductsQueryState.followsPerRelay() = followsPerRelayFlow().value
+
+    val userJobMap = mutableMapOf<User, List<Job>>()
+
+    @OptIn(FlowPreview::class)
+    override fun newSub(key: ProductsQueryState): Subscription {
+        val user = user(key)
+        userJobMap[user]?.forEach { it.cancel() }
+        userJobMap[user] =
+            listOf(
+                key.scope.launch(Dispatchers.IO) {
+                    key.listNameFlow().collectLatest {
+                        invalidateFilters()
+                    }
+                },
+                key.scope.launch(Dispatchers.IO) {
+                    key.followsPerRelayFlow().sample(500).collectLatest {
+                        invalidateFilters()
+                    }
+                },
+                key.account.scope.launch(Dispatchers.IO) {
+                    key.feedStates.productsFeed.lastNoteCreatedAtWhenFullyLoaded.sample(5000).collectLatest {
+                        invalidateFilters()
+                    }
+                },
+            )
+
+        return super.newSub(key)
+    }
+
+    override fun endSub(
+        key: User,
+        subId: String,
+    ) {
+        super.endSub(key, subId)
+        userJobMap[key]?.forEach { it.cancel() }
+    }
+}