- Adds support for creating and replying to NIP-22 geo scope posts

- Adds support for creating and replying to NIP-22 hashtag scope posts
- Refactors NIP-73 and NIP-22 on quartz to better support scoped replies
- Creates New post screens for both hashtags and geolocated posts.

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

@@ -165,6 +165,8 @@ import com.vitorpamplona.quartz.nip68Picture.pictureIMeta
 import com.vitorpamplona.quartz.nip71Video.VideoHorizontalEvent
 import com.vitorpamplona.quartz.nip71Video.VideoMeta
 import com.vitorpamplona.quartz.nip71Video.VideoVerticalEvent
+import com.vitorpamplona.quartz.nip73ExternalIds.location.GeohashId
+import com.vitorpamplona.quartz.nip73ExternalIds.topics.HashtagId
 import com.vitorpamplona.quartz.nip78AppData.AppSpecificDataEvent
 import com.vitorpamplona.quartz.nip90Dvms.NIP90ContentDiscoveryRequestEvent
 import com.vitorpamplona.quartz.nip92IMeta.IMetaTag
@@ -230,7 +232,10 @@ class Account(
         val hashtags: Set<String> = emptySet(),
         val geotags: Set<String> = emptySet(),
         val addresses: Set<String> = emptySet(),
-    )
+    ) {
+        val geotagScopes: Set<String> = geotags.mapTo(mutableSetOf<String>()) { GeohashId.toScope(it) }
+        val hashtagScopes: Set<String> = hashtags.mapTo(mutableSetOf<String>()) { HashtagId.toScope(it) }
+    }
 
     class FeedsBaseFlows(
         val listName: String,
@@ -623,7 +628,6 @@ class Account(
                     listName,
                     location = Amethyst.instance.locationManager.geohashStateFlow,
                 )
-
             else -> {
                 val note = LocalCache.checkGetOrCreateAddressableNote(listName)
                 if (note != null) {

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

@@ -50,6 +50,7 @@ import com.vitorpamplona.quartz.nip18Reposts.GenericRepostEvent
 import com.vitorpamplona.quartz.nip18Reposts.RepostEvent
 import com.vitorpamplona.quartz.nip19Bech32.entities.NAddress
 import com.vitorpamplona.quartz.nip19Bech32.entities.NEvent
+import com.vitorpamplona.quartz.nip22Comments.CommentEvent
 import com.vitorpamplona.quartz.nip23LongContent.LongTextNoteEvent
 import com.vitorpamplona.quartz.nip28PublicChat.admin.ChannelCreateEvent
 import com.vitorpamplona.quartz.nip28PublicChat.admin.ChannelMetadataEvent
@@ -854,6 +855,10 @@ open class Note(
                 return true
             }
 
+            if (thisEvent is CommentEvent) {
+                thisEvent.isScoped { it.containsAny(accountChoices.hiddenWordsCase) }
+            }
+
             if (thisEvent.anyHashTag { it.containsAny(accountChoices.hiddenWordsCase) }) {
                 return true
             }

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/actions/NewPostViewModel.kt

@@ -118,7 +118,7 @@ import com.vitorpamplona.quartz.nip57Zaps.splits.zapSplits
 import com.vitorpamplona.quartz.nip57Zaps.zapraiser.zapraiser
 import com.vitorpamplona.quartz.nip57Zaps.zapraiser.zapraiserAmount
 import com.vitorpamplona.quartz.nip72ModCommunities.definition.CommunityDefinitionEvent
-import com.vitorpamplona.quartz.nip73ExternalIds.GeohashId
+import com.vitorpamplona.quartz.nip73ExternalIds.location.GeohashId
 import com.vitorpamplona.quartz.nip92IMeta.IMetaTagBuilder
 import com.vitorpamplona.quartz.nip92IMeta.imetas
 import com.vitorpamplona.quartz.nip94FileMetadata.alt

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

@@ -58,7 +58,9 @@ class FilterByListParams(
         } else if (noteEvent is CommentEvent) {
             // ignore follows and checks only the root scope
             noteEvent.isTaggedHashes(followLists.hashtags) ||
+                noteEvent.isTaggedScopes(followLists.hashtagScopes) ||
                 noteEvent.isTaggedGeoHashes(followLists.geotags) ||
+                noteEvent.isTaggedScopes(followLists.geotagScopes) ||
                 noteEvent.isTaggedAddressableNotes(followLists.addresses)
         } else {
             noteEvent.pubKey in followLists.authors ||

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

@@ -70,6 +70,8 @@ import com.vitorpamplona.amethyst.ui.screen.loggedIn.discover.nip99Classifieds.N
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.drafts.DraftListScreen
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.dvms.DvmContentDiscoveryScreen
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.geohash.GeoHashScreen
+import com.vitorpamplona.amethyst.ui.screen.loggedIn.geohash.GeoPostScreen
+import com.vitorpamplona.amethyst.ui.screen.loggedIn.hashtag.HashtagPostScreen
 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.notifications.NotificationScreen
@@ -140,6 +142,32 @@ fun AppNavigation(
 
             composableArgs<Route.EventRedirect> { LoadRedirectScreen(it.id, accountViewModel, nav) }
 
+            composableFromBottomArgs<Route.GeoPost> {
+                GeoPostScreen(
+                    geohash = it.geohash,
+                    message = it.message,
+                    attachment = it.attachment?.ifBlank { null }?.toUri(),
+                    reply = it.replyTo?.let { hex -> accountViewModel.getNoteIfExists(hex) },
+                    quote = it.quote?.let { hex -> accountViewModel.getNoteIfExists(hex) },
+                    draft = it.draft?.let { hex -> accountViewModel.getNoteIfExists(hex) },
+                    accountViewModel,
+                    nav,
+                )
+            }
+
+            composableFromBottomArgs<Route.HashtagPost> {
+                HashtagPostScreen(
+                    hashtag = it.hashtag,
+                    message = it.message,
+                    attachment = it.attachment?.ifBlank { null }?.toUri(),
+                    reply = it.replyTo?.let { hex -> accountViewModel.getNoteIfExists(hex) },
+                    quote = it.quote?.let { hex -> accountViewModel.getNoteIfExists(hex) },
+                    draft = it.draft?.let { hex -> accountViewModel.getNoteIfExists(hex) },
+                    accountViewModel,
+                    nav,
+                )
+            }
+
             composableFromBottomArgs<Route.NewProduct> {
                 NewProductScreen(
                     message = it.message,
@@ -160,7 +188,6 @@ fun AppNavigation(
                     fork = it.fork?.let { hex -> accountViewModel.getNoteIfExists(hex) },
                     version = it.version?.let { hex -> accountViewModel.getNoteIfExists(hex) },
                     draft = it.draft?.let { hex -> accountViewModel.getNoteIfExists(hex) },
-                    enableGeolocation = it.enableGeolocation,
                     accountViewModel = accountViewModel,
                     nav = nav,
                 )

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

@@ -56,7 +56,7 @@ interface INav {
 
     fun nav(route: Route)
 
-    fun nav(computeRoute: suspend () -> Route)
+    fun nav(computeRoute: suspend () -> Route?)
 
     fun newStack(route: Route)
 
@@ -95,10 +95,10 @@ class Nav(
         }
     }
 
-    override fun nav(computeRoute: suspend () -> Route) {
+    override fun nav(computeRoute: suspend () -> Route?) {
         scope.launch {
             val route = computeRoute()
-            if (getRouteWithArguments(controller) != route) {
+            if (route != null && getRouteWithArguments(controller) != route) {
                 controller.navigate(route)
             }
         }
@@ -148,7 +148,7 @@ object EmptyNav : INav {
 
     override fun nav(route: Route) {}
 
-    override fun nav(computeRoute: suspend () -> Route) {}
+    override fun nav(computeRoute: suspend () -> Route?) {}
 
     override fun newStack(route: Route) {}
 
@@ -181,7 +181,7 @@ class ObservableNavigate(
         nav.nav(route)
     }
 
-    override fun nav(computeRoute: suspend () -> Route) {
+    override fun nav(computeRoute: suspend () -> Route?) {
         onNavigate()
         nav.nav(computeRoute)
     }

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

@@ -29,14 +29,19 @@ import com.vitorpamplona.quartz.experimental.ephemChat.chat.RoomId
 import com.vitorpamplona.quartz.nip01Core.core.AddressableEvent
 import com.vitorpamplona.quartz.nip01Core.core.Event
 import com.vitorpamplona.quartz.nip01Core.core.HexKey
+import com.vitorpamplona.quartz.nip04Dm.messages.PrivateDmEvent
+import com.vitorpamplona.quartz.nip10Notes.TextNoteEvent
 import com.vitorpamplona.quartz.nip17Dm.base.ChatroomKey
 import com.vitorpamplona.quartz.nip17Dm.base.ChatroomKeyable
+import com.vitorpamplona.quartz.nip22Comments.CommentEvent
 import com.vitorpamplona.quartz.nip28PublicChat.admin.ChannelCreateEvent
 import com.vitorpamplona.quartz.nip28PublicChat.base.IsInPublicChatChannel
 import com.vitorpamplona.quartz.nip37Drafts.DraftEvent
 import com.vitorpamplona.quartz.nip53LiveActivities.chat.LiveActivitiesChatMessageEvent
 import com.vitorpamplona.quartz.nip53LiveActivities.streaming.LiveActivitiesEvent
 import com.vitorpamplona.quartz.nip72ModCommunities.definition.CommunityDefinitionEvent
+import com.vitorpamplona.quartz.nip73ExternalIds.location.isGeohashedScoped
+import com.vitorpamplona.quartz.nip73ExternalIds.topics.isHashtagScoped
 import com.vitorpamplona.quartz.nip89AppHandlers.definition.AppDefinitionEvent
 
 fun routeFor(
@@ -142,8 +147,16 @@ fun routeToMessage(
     replyId: HexKey? = null,
     draftId: HexKey? = null,
     accountViewModel: AccountViewModel,
+): Route = routeToMessage(room, draftMessage, replyId, draftId, accountViewModel.userProfile())
+
+fun routeToMessage(
+    room: ChatroomKey,
+    draftMessage: String?,
+    replyId: HexKey? = null,
+    draftId: HexKey? = null,
+    fromUser: User,
 ): Route {
-    accountViewModel.account.userProfile().createChatroom(room)
+    fromUser.createChatroom(room)
 
     return Route.Room(room.hashCode(), draftMessage, replyId, draftId)
 }
@@ -168,3 +181,69 @@ fun routeFor(roomId: RoomId): Route = Route.EphemeralChat(roomId.id, roomId.rela
 fun routeFor(user: User): Route.Profile = Route.Profile(user.pubkeyHex)
 
 fun authorRouteFor(note: Note): Route.Profile? = note.author?.pubkeyHex?.let { Route.Profile(it) }
+
+fun routeReplyTo(
+    note: Note,
+    asUser: User,
+): Route? {
+    val noteEvent = note.event
+    return when (noteEvent) {
+        is TextNoteEvent -> Route.NewPost(baseReplyTo = note.idHex)
+        is PrivateDmEvent ->
+            routeToMessage(
+                room = noteEvent.chatroomKey(asUser.pubkeyHex),
+                draftMessage = null,
+                replyId = noteEvent.id,
+                draftId = null,
+                fromUser = asUser,
+            )
+        is ChatroomKeyable ->
+            routeToMessage(
+                room = noteEvent.chatroomKey(asUser.pubkeyHex),
+                draftMessage = null,
+                replyId = noteEvent.id,
+                draftId = null,
+                fromUser = asUser,
+            )
+        is CommentEvent -> {
+            if (noteEvent.isGeohashedScoped()) {
+                Route.GeoPost(replyTo = note.idHex)
+            } else if (noteEvent.isHashtagScoped()) {
+                Route.HashtagPost(replyTo = note.idHex)
+            } else {
+                null
+            }
+        }
+
+        else -> null
+    }
+}
+
+fun routeQuote(
+    note: Note,
+    asUser: User,
+): Route? {
+    val noteEvent = note.event
+    return when (noteEvent) {
+        is TextNoteEvent -> Route.NewPost(baseReplyTo = note.idHex)
+        is PrivateDmEvent ->
+            routeToMessage(
+                room = noteEvent.chatroomKey(asUser.pubkeyHex),
+                draftMessage = null,
+                replyId = noteEvent.id,
+                draftId = null,
+                fromUser = asUser,
+            )
+        is ChatroomKeyable ->
+            routeToMessage(
+                room = noteEvent.chatroomKey(asUser.pubkeyHex),
+                draftMessage = null,
+                replyId = noteEvent.id,
+                draftId = null,
+                fromUser = asUser,
+            )
+        is CommentEvent -> Route.GeoPost(replyTo = note.idHex)
+
+        else -> null
+    }
+}

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

@@ -139,6 +139,26 @@ sealed class Route {
         val draft: String? = null,
     ) : Route()
 
+    @Serializable
+    data class GeoPost(
+        val geohash: String? = null,
+        val message: String? = null,
+        val attachment: String? = null,
+        val replyTo: String? = null,
+        val quote: String? = null,
+        val draft: String? = null,
+    ) : Route()
+
+    @Serializable
+    data class HashtagPost(
+        val hashtag: String? = null,
+        val message: String? = null,
+        val attachment: String? = null,
+        val replyTo: String? = null,
+        val quote: String? = null,
+        val draft: String? = null,
+    ) : Route()
+
     @Serializable
     data class NewPost(
         val message: String? = null,
@@ -148,7 +168,6 @@ sealed class Route {
         val fork: String? = null,
         val version: String? = null,
         val draft: String? = null,
-        val enableGeolocation: Boolean = false,
     ) : Route()
 }
 
@@ -191,6 +210,8 @@ fun getRouteWithArguments(navController: NavHostController): Route? {
         dest.hasRoute<Route.Room>() -> entry.toRoute<Route.Room>()
         dest.hasRoute<Route.NewPost>() -> entry.toRoute<Route.NewPost>()
         dest.hasRoute<Route.NewProduct>() -> entry.toRoute<Route.NewProduct>()
+        dest.hasRoute<Route.GeoPost>() -> entry.toRoute<Route.GeoPost>()
+        dest.hasRoute<Route.HashtagPost>() -> entry.toRoute<Route.HashtagPost>()
 
         else -> {
             null

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/note/NoteCompose.kt

@@ -157,7 +157,7 @@ import com.vitorpamplona.quartz.experimental.medical.FhirResourceEvent
 import com.vitorpamplona.quartz.experimental.nip95.header.FileStorageHeaderEvent
 import com.vitorpamplona.quartz.experimental.zapPolls.PollNoteEvent
 import com.vitorpamplona.quartz.nip01Core.tags.addressables.isTaggedAddressableKind
-import com.vitorpamplona.quartz.nip01Core.tags.geohash.getGeoHash
+import com.vitorpamplona.quartz.nip01Core.tags.geohash.geoHashOrScope
 import com.vitorpamplona.quartz.nip04Dm.messages.PrivateDmEvent
 import com.vitorpamplona.quartz.nip10Notes.BaseThreadedEvent
 import com.vitorpamplona.quartz.nip10Notes.TextNoteEvent
@@ -974,7 +974,7 @@ fun SecondUserInfoRow(
             ObserveDisplayNip05Status(noteAuthor, remember(noteEvent) { Modifier.weight(1f) }, accountViewModel, nav)
         }
 
-        val geo = remember(noteEvent) { noteEvent.getGeoHash() }
+        val geo = remember(noteEvent) { noteEvent.geoHashOrScope() }
         if (geo != null) {
             Spacer(StdHorzSpacer)
             DisplayLocation(geo, nav)

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/note/ReactionsRow.kt

@@ -114,7 +114,7 @@ import com.vitorpamplona.amethyst.ui.components.GenericLoadable
 import com.vitorpamplona.amethyst.ui.components.InLineIconRenderer
 import com.vitorpamplona.amethyst.ui.navigation.INav
 import com.vitorpamplona.amethyst.ui.navigation.Route
-import com.vitorpamplona.amethyst.ui.navigation.routeToMessage
+import com.vitorpamplona.amethyst.ui.navigation.routeReplyTo
 import com.vitorpamplona.amethyst.ui.note.types.EditState
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.AccountViewModel
 import com.vitorpamplona.amethyst.ui.stringRes
@@ -151,7 +151,6 @@ import com.vitorpamplona.amethyst.ui.theme.placeholderText
 import com.vitorpamplona.amethyst.ui.theme.reactionBox
 import com.vitorpamplona.amethyst.ui.theme.ripple24dp
 import com.vitorpamplona.amethyst.ui.theme.selectedReactionBoxModifier
-import com.vitorpamplona.quartz.nip04Dm.messages.PrivateDmEvent
 import com.vitorpamplona.quartz.nip10Notes.BaseThreadedEvent
 import com.vitorpamplona.quartz.nip17Dm.base.ChatroomKeyable
 import com.vitorpamplona.quartz.nip30CustomEmoji.CustomEmoji
@@ -581,35 +580,7 @@ private fun ReplyReactionWithDialog(
     nav: INav,
 ) {
     ReplyReaction(baseNote, grayTint, accountViewModel) {
-        val noteEvent = baseNote.event
-        if (noteEvent is PrivateDmEvent) {
-            nav.nav {
-                routeToMessage(
-                    room = noteEvent.chatroomKey(accountViewModel.userProfile().pubkeyHex),
-                    draftMessage = null,
-                    replyId = noteEvent.id,
-                    draftId = null,
-                    accountViewModel = accountViewModel,
-                )
-            }
-        } else if (noteEvent is ChatroomKeyable) {
-            nav.nav {
-                routeToMessage(
-                    room = noteEvent.chatroomKey(accountViewModel.userProfile().pubkeyHex),
-                    draftMessage = null,
-                    replyId = noteEvent.id,
-                    draftId = null,
-                    accountViewModel = accountViewModel,
-                )
-            }
-        } else {
-            nav.nav {
-                Route.NewPost(
-                    baseReplyTo = baseNote.idHex,
-                    quote = null,
-                )
-            }
-        }
+        nav.nav { routeReplyTo(baseNote, accountViewModel.userProfile()) }
     }
 }
 

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/note/elements/DisplayHashtags.kt

@@ -41,6 +41,8 @@ import com.vitorpamplona.amethyst.ui.navigation.INav
 import com.vitorpamplona.amethyst.ui.navigation.Route
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.AccountViewModel
 import com.vitorpamplona.quartz.nip01Core.tags.hashtags.firstIsTaggedHashes
+import com.vitorpamplona.quartz.nip22Comments.CommentEvent
+import com.vitorpamplona.quartz.nip73ExternalIds.topics.HashtagId
 
 @Composable
 fun DisplayFollowingHashtagsInPost(
@@ -52,7 +54,14 @@ fun DisplayFollowingHashtagsInPost(
     var firstTag by remember(baseNote) { mutableStateOf<String?>(null) }
 
     LaunchedEffect(key1 = userFollowState) {
-        val newFirstTag = baseNote.event?.firstIsTaggedHashes(userFollowState.hashtags)
+        val noteEvent = baseNote.event
+
+        val newFirstTag =
+            if (noteEvent is CommentEvent) {
+                noteEvent.firstTaggedScopeIn(userFollowState.hashtagScopes)?.let { HashtagId.parse(it) } ?: noteEvent.firstIsTaggedHashes(userFollowState.hashtags)
+            } else {
+                noteEvent?.firstIsTaggedHashes(userFollowState.hashtags)
+            }
 
         if (firstTag != newFirstTag) {
             firstTag = newFirstTag

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

@@ -154,13 +154,11 @@ fun NewPostScreen(
     fork: Note? = null,
     version: Note? = null,
     draft: Note? = null,
-    enableGeolocation: Boolean = false,
     accountViewModel: AccountViewModel,
     nav: Nav,
 ) {
     val postViewModel: NewPostViewModel = viewModel()
     postViewModel.init(accountViewModel)
-    postViewModel.wantsToAddGeoHash = enableGeolocation
 
     val context = LocalContext.current
     val activity = context.getActivity()

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/chats/feed/ChatMessageCompose.kt

@@ -77,7 +77,7 @@ import com.vitorpamplona.amethyst.ui.theme.Size18Modifier
 import com.vitorpamplona.amethyst.ui.theme.StdHorzSpacer
 import com.vitorpamplona.amethyst.ui.theme.StdVertSpacer
 import com.vitorpamplona.amethyst.ui.theme.placeholderText
-import com.vitorpamplona.quartz.nip01Core.tags.geohash.getGeoHash
+import com.vitorpamplona.quartz.nip01Core.tags.geohash.geoHashOrScope
 import com.vitorpamplona.quartz.nip04Dm.messages.PrivateDmEvent
 import com.vitorpamplona.quartz.nip13Pow.strongPoWOrNull
 import com.vitorpamplona.quartz.nip17Dm.base.ChatroomKeyable
@@ -230,7 +230,7 @@ fun NormalChatNote(
 
                             ZapReaction(note, MaterialTheme.colorScheme.placeholderText, accountViewModel, nav = nav)
 
-                            val geo = remember(note) { note.event?.getGeoHash() }
+                            val geo = remember(note) { note.event?.geoHashOrScope() }
                             if (geo != null) {
                                 Spacer(StdHorzSpacer)
                                 DisplayLocation(geo, nav)

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/chats/rooms/twopane/TwoPaneNav.kt

@@ -45,13 +45,15 @@ class TwoPaneNav(
         }
     }
 
-    override fun nav(routeMaker: suspend () -> Route) {
+    override fun nav(routeMaker: suspend () -> Route?) {
         scope.launch(Dispatchers.Default) {
             val route = routeMaker()
-            if (route is Route.Room || route is Route.Channel) {
-                innerNav.value = route
-            } else {
-                nav.nav(route)
+            if (route != null) {
+                if (route is Route.Room || route is Route.Channel) {
+                    innerNav.value = route
+                } else {
+                    nav.nav(route)
+                }
             }
         }
     }

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/discover/nip99Classifieds/NewProductViewModel.kt

@@ -389,7 +389,6 @@ open class NewProductViewModel :
     ) {
         viewModelScope.launch(Dispatchers.Default) {
             val myAccount = account ?: return@launch
-
             val myMultiOrchestrator = multiOrchestrator ?: return@launch
 
             isUploadingImage = true

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

@@ -89,6 +89,9 @@ fun GeoHashScreen(
                 popBack = nav::popBack,
             )
         },
+        floatingButton = {
+            NewGeoPostButton(tag, accountViewModel, nav)
+        },
         accountViewModel = accountViewModel,
     ) {
         Column(Modifier.padding(it)) {

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

@@ -0,0 +1,546 @@
+/**
+ * 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.geohash
+
+import android.net.Uri
+import androidx.compose.foundation.horizontalScroll
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Arrangement.Absolute.spacedBy
+import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.Spacer
+import androidx.compose.foundation.layout.consumeWindowInsets
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.height
+import androidx.compose.foundation.layout.heightIn
+import androidx.compose.foundation.layout.imePadding
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.layout.size
+import androidx.compose.foundation.lazy.LazyRow
+import androidx.compose.foundation.lazy.items
+import androidx.compose.foundation.rememberScrollState
+import androidx.compose.foundation.verticalScroll
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.filled.LocationOn
+import androidx.compose.material3.ExperimentalMaterial3Api
+import androidx.compose.material3.Icon
+import androidx.compose.material3.IconButton
+import androidx.compose.material3.LocalTextStyle
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Scaffold
+import androidx.compose.material3.Surface
+import androidx.compose.material3.Text
+import androidx.compose.material3.TopAppBar
+import androidx.compose.material3.TopAppBarDefaults
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.LaunchedEffect
+import androidx.compose.runtime.getValue
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Alignment.Companion.CenterVertically
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.platform.LocalContext
+import androidx.compose.ui.text.LinkAnnotation
+import androidx.compose.ui.text.buildAnnotatedString
+import androidx.compose.ui.text.font.FontWeight
+import androidx.compose.ui.text.input.TextFieldValue
+import androidx.compose.ui.text.withLink
+import androidx.compose.ui.unit.dp
+import androidx.lifecycle.compose.collectAsStateWithLifecycle
+import androidx.lifecycle.viewModelScope
+import androidx.lifecycle.viewmodel.compose.viewModel
+import com.vitorpamplona.amethyst.R
+import com.vitorpamplona.amethyst.model.Note
+import com.vitorpamplona.amethyst.ui.actions.RelaySelectionDialogEasy
+import com.vitorpamplona.amethyst.ui.actions.mediaServers.ServerType
+import com.vitorpamplona.amethyst.ui.actions.uploads.SelectFromGallery
+import com.vitorpamplona.amethyst.ui.actions.uploads.SelectedMedia
+import com.vitorpamplona.amethyst.ui.actions.uploads.TakePictureButton
+import com.vitorpamplona.amethyst.ui.navigation.INav
+import com.vitorpamplona.amethyst.ui.navigation.Nav
+import com.vitorpamplona.amethyst.ui.navigation.Route
+import com.vitorpamplona.amethyst.ui.note.BaseUserPicture
+import com.vitorpamplona.amethyst.ui.note.NoteCompose
+import com.vitorpamplona.amethyst.ui.note.creators.contentWarning.ContentSensitivityExplainer
+import com.vitorpamplona.amethyst.ui.note.creators.contentWarning.MarkAsSensitiveButton
+import com.vitorpamplona.amethyst.ui.note.creators.emojiSuggestions.ShowEmojiSuggestionList
+import com.vitorpamplona.amethyst.ui.note.creators.emojiSuggestions.WatchAndLoadMyEmojiList
+import com.vitorpamplona.amethyst.ui.note.creators.invoice.AddLnInvoiceButton
+import com.vitorpamplona.amethyst.ui.note.creators.invoice.InvoiceRequest
+import com.vitorpamplona.amethyst.ui.note.creators.location.LoadCityName
+import com.vitorpamplona.amethyst.ui.note.creators.messagefield.MessageField
+import com.vitorpamplona.amethyst.ui.note.creators.previews.PreviewUrl
+import com.vitorpamplona.amethyst.ui.note.creators.previews.PreviewUrlFillWidth
+import com.vitorpamplona.amethyst.ui.note.creators.secretEmoji.AddSecretEmojiButton
+import com.vitorpamplona.amethyst.ui.note.creators.secretEmoji.SecretEmojiRequest
+import com.vitorpamplona.amethyst.ui.note.creators.uploads.ImageVideoDescription
+import com.vitorpamplona.amethyst.ui.note.creators.userSuggestions.ShowUserSuggestionList
+import com.vitorpamplona.amethyst.ui.note.creators.zapraiser.AddZapraiserButton
+import com.vitorpamplona.amethyst.ui.note.creators.zapraiser.ZapRaiserRequest
+import com.vitorpamplona.amethyst.ui.note.creators.zapsplits.ForwardZapTo
+import com.vitorpamplona.amethyst.ui.note.creators.zapsplits.ForwardZapToButton
+import com.vitorpamplona.amethyst.ui.painterRes
+import com.vitorpamplona.amethyst.ui.screen.loggedIn.AccountViewModel
+import com.vitorpamplona.amethyst.ui.screen.loggedIn.CloseButton
+import com.vitorpamplona.amethyst.ui.screen.loggedIn.Notifying
+import com.vitorpamplona.amethyst.ui.screen.loggedIn.PostButton
+import com.vitorpamplona.amethyst.ui.stringRes
+import com.vitorpamplona.amethyst.ui.theme.FillWidthQuoteBorderModifier
+import com.vitorpamplona.amethyst.ui.theme.HalfHorzPadding
+import com.vitorpamplona.amethyst.ui.theme.Height100Modifier
+import com.vitorpamplona.amethyst.ui.theme.Size10dp
+import com.vitorpamplona.amethyst.ui.theme.Size35dp
+import com.vitorpamplona.amethyst.ui.theme.Size5dp
+import com.vitorpamplona.amethyst.ui.theme.SquaredQuoteBorderModifier
+import com.vitorpamplona.amethyst.ui.theme.StdHorzSpacer
+import com.vitorpamplona.amethyst.ui.theme.StdVertSpacer
+import com.vitorpamplona.amethyst.ui.theme.replyModifier
+import com.vitorpamplona.quartz.nip73ExternalIds.location.GeohashId
+import kotlinx.collections.immutable.persistentListOf
+import kotlinx.collections.immutable.toImmutableList
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.launch
+import kotlinx.coroutines.withContext
+
+@Composable
+fun GeoPostScreen(
+    geohash: String? = null,
+    message: String? = null,
+    attachment: Uri? = null,
+    reply: Note? = null,
+    quote: Note? = null,
+    draft: Note? = null,
+    accountViewModel: AccountViewModel,
+    nav: Nav,
+) {
+    val postViewModel: GeoPostViewModel = viewModel()
+    postViewModel.init(accountViewModel)
+
+    val context = LocalContext.current
+
+    LaunchedEffect(Unit) {
+        postViewModel.reloadRelaySet()
+        geohash?.let {
+            postViewModel.newPostFor(GeohashId(it))
+        }
+        reply?.let {
+            postViewModel.reply(it)
+        }
+        draft?.let {
+            postViewModel.editFromDraft(it)
+        }
+        quote?.let {
+            postViewModel.quote(it)
+        }
+        message?.ifBlank { null }?.let {
+            postViewModel.updateMessage(TextFieldValue(it))
+        }
+        attachment?.let {
+            withContext(Dispatchers.IO) {
+                val mediaType = context.contentResolver.getType(it)
+                postViewModel.selectImage(persistentListOf(SelectedMedia(it, mediaType)))
+            }
+        }
+    }
+
+    NewGeoPostScreenInner(postViewModel, accountViewModel, nav)
+}
+
+@OptIn(ExperimentalMaterial3Api::class)
+@Composable
+fun NewGeoPostScreenInner(
+    postViewModel: GeoPostViewModel,
+    accountViewModel: AccountViewModel,
+    nav: Nav,
+) {
+    WatchAndLoadMyEmojiList(accountViewModel)
+
+    Scaffold(
+        topBar = {
+            TopAppBar(
+                title = {
+                    Row(
+                        modifier = Modifier.fillMaxWidth(),
+                        horizontalArrangement = Arrangement.SpaceBetween,
+                        verticalAlignment = CenterVertically,
+                    ) {
+                        Spacer(modifier = StdHorzSpacer)
+
+                        Box {
+                            IconButton(
+                                modifier = Modifier.align(Alignment.Center),
+                                onClick = { postViewModel.showRelaysDialog = true },
+                            ) {
+                                Icon(
+                                    painter = painterRes(R.drawable.relays),
+                                    contentDescription = stringRes(id = R.string.relay_list_selector),
+                                    modifier = Modifier.height(25.dp),
+                                    tint = MaterialTheme.colorScheme.onBackground,
+                                )
+                            }
+                        }
+                        PostButton(
+                            onPost = {
+                                // uses the accountViewModel scope to avoid cancelling this
+                                // function when the postViewModel is released
+                                accountViewModel.viewModelScope.launch(Dispatchers.IO) {
+                                    postViewModel.sendPostSync()
+                                    nav.popBack()
+                                }
+                            },
+                            isActive = postViewModel.canPost(),
+                        )
+                    }
+                },
+                navigationIcon = {
+                    Row {
+                        Spacer(modifier = StdHorzSpacer)
+                        CloseButton(
+                            onPress = {
+                                // uses the accountViewModel scope to avoid cancelling this
+                                // function when the postViewModel is released
+                                accountViewModel.viewModelScope.launch(Dispatchers.IO) {
+                                    postViewModel.sendDraftSync()
+                                    nav.popBack()
+                                    postViewModel.cancel()
+                                }
+                            },
+                        )
+                    }
+                },
+                colors =
+                    TopAppBarDefaults.topAppBarColors(
+                        containerColor = MaterialTheme.colorScheme.surface,
+                    ),
+            )
+        },
+    ) { pad ->
+        if (postViewModel.showRelaysDialog) {
+            RelaySelectionDialogEasy(
+                preSelectedList = postViewModel.relayList ?: persistentListOf(),
+                onClose = { postViewModel.showRelaysDialog = false },
+                onPost = { postViewModel.relayList = it.map { it.url }.toImmutableList() },
+                accountViewModel = accountViewModel,
+                nav = nav,
+            )
+        }
+        Surface(
+            modifier =
+                Modifier
+                    .padding(pad)
+                    .consumeWindowInsets(pad)
+                    .imePadding(),
+        ) {
+            NewGeoPostBody(
+                postViewModel,
+                accountViewModel,
+                nav,
+            )
+        }
+    }
+}
+
+@Composable
+private fun NewGeoPostBody(
+    postViewModel: GeoPostViewModel,
+    accountViewModel: AccountViewModel,
+    nav: Nav,
+) {
+    val scrollState = rememberScrollState()
+
+    Column(Modifier.fillMaxSize()) {
+        Row(
+            modifier =
+                Modifier
+                    .fillMaxWidth()
+                    .padding(
+                        start = Size10dp,
+                        end = Size10dp,
+                    ).weight(1f),
+        ) {
+            Column(Modifier.fillMaxWidth().verticalScroll(scrollState)) {
+                postViewModel.externalIdentity?.let {
+                    Row {
+                        DisplayExternalId(it, accountViewModel, nav)
+                        Spacer(modifier = StdVertSpacer)
+                    }
+                }
+
+                postViewModel.replyingTo?.let {
+                    Row {
+                        NoteCompose(
+                            baseNote = it,
+                            modifier = MaterialTheme.colorScheme.replyModifier,
+                            isQuotedNote = true,
+                            unPackReply = false,
+                            makeItShort = true,
+                            quotesLeft = 1,
+                            accountViewModel = accountViewModel,
+                            nav = nav,
+                        )
+                        Spacer(modifier = StdVertSpacer)
+                    }
+                }
+
+                Row {
+                    Notifying(postViewModel.notifying?.toImmutableList(), accountViewModel) {
+                        postViewModel.removeFromReplyList(it)
+                    }
+                }
+
+                Row(
+                    modifier = Modifier.padding(vertical = Size10dp),
+                ) {
+                    BaseUserPicture(
+                        accountViewModel.userProfile(),
+                        Size35dp,
+                        accountViewModel = accountViewModel,
+                    )
+                    MessageField(
+                        R.string.what_s_on_your_mind,
+                        postViewModel,
+                    )
+                }
+
+                DisplayPreviews(postViewModel, accountViewModel, nav)
+
+                if (postViewModel.wantsToMarkAsSensitive) {
+                    Row(
+                        verticalAlignment = CenterVertically,
+                        modifier = Modifier.padding(vertical = Size5dp, horizontal = Size10dp),
+                    ) {
+                        ContentSensitivityExplainer()
+                    }
+                }
+
+                if (postViewModel.wantsForwardZapTo) {
+                    Row(
+                        verticalAlignment = CenterVertically,
+                        modifier = Modifier.padding(top = Size5dp, bottom = Size5dp, start = Size10dp),
+                    ) {
+                        ForwardZapTo(postViewModel, accountViewModel)
+                    }
+                }
+
+                postViewModel.multiOrchestrator?.let {
+                    Row(
+                        verticalAlignment = CenterVertically,
+                        modifier = Modifier.padding(vertical = Size5dp, horizontal = Size10dp),
+                    ) {
+                        val context = LocalContext.current
+                        ImageVideoDescription(
+                            it,
+                            accountViewModel.account.settings.defaultFileServer,
+                            onAdd = { alt, server, sensitiveContent, mediaQuality ->
+                                postViewModel.upload(alt, if (sensitiveContent) "" else null, mediaQuality, server, accountViewModel.toastManager::toast, context)
+                                if (server.type != ServerType.NIP95) {
+                                    accountViewModel.account.settings.changeDefaultFileServer(server)
+                                }
+                            },
+                            onDelete = postViewModel::deleteMediaToUpload,
+                            onCancel = { postViewModel.multiOrchestrator = null },
+                            accountViewModel = accountViewModel,
+                        )
+                    }
+                }
+
+                if (postViewModel.wantsInvoice) {
+                    postViewModel.lnAddress()?.let { lud16 ->
+                        InvoiceRequest(
+                            lud16,
+                            accountViewModel.account.userProfile().pubkeyHex,
+                            accountViewModel,
+                            stringRes(id = R.string.lightning_invoice),
+                            stringRes(id = R.string.lightning_create_and_add_invoice),
+                            onSuccess = {
+                                postViewModel.insertAtCursor(it)
+                                postViewModel.wantsInvoice = false
+                            },
+                            onError = { title, message -> accountViewModel.toastManager.toast(title, message) },
+                        )
+                    }
+                }
+
+                if (postViewModel.wantsSecretEmoji) {
+                    Row(
+                        verticalAlignment = CenterVertically,
+                        modifier = Modifier.padding(vertical = Size5dp, horizontal = Size10dp),
+                    ) {
+                        Column(Modifier.fillMaxWidth()) {
+                            SecretEmojiRequest {
+                                postViewModel.insertAtCursor(it)
+                                postViewModel.wantsSecretEmoji = false
+                            }
+                        }
+                    }
+                }
+
+                if (postViewModel.wantsZapraiser && postViewModel.hasLnAddress()) {
+                    Row(
+                        verticalAlignment = CenterVertically,
+                        modifier = Modifier.padding(vertical = Size5dp, horizontal = Size10dp),
+                    ) {
+                        ZapRaiserRequest(
+                            stringRes(id = R.string.zapraiser),
+                            postViewModel,
+                        )
+                    }
+                }
+            }
+        }
+
+        postViewModel.userSuggestions?.let {
+            ShowUserSuggestionList(
+                it,
+                postViewModel::autocompleteWithUser,
+                accountViewModel,
+                modifier = Modifier.heightIn(0.dp, 300.dp),
+            )
+        }
+
+        postViewModel.emojiSuggestions?.let {
+            ShowEmojiSuggestionList(
+                it,
+                postViewModel::autocompleteWithEmoji,
+                postViewModel::autocompleteWithEmojiUrl,
+                accountViewModel,
+                modifier = Modifier.heightIn(0.dp, 300.dp),
+            )
+        }
+
+        BottomRowActions(postViewModel)
+    }
+}
+
+@Composable
+fun DisplayExternalId(
+    externalId: GeohashId,
+    accountViewModel: AccountViewModel,
+    nav: INav,
+) {
+    Row(modifier = MaterialTheme.colorScheme.replyModifier.padding(10.dp), verticalAlignment = Alignment.CenterVertically) {
+        LoadCityName(externalId.geohash) { cityName ->
+            Icon(
+                imageVector = Icons.Default.LocationOn,
+                contentDescription = stringRes(id = R.string.geohash_exclusive),
+                modifier = Modifier.size(20.dp),
+                tint = MaterialTheme.colorScheme.primary,
+            )
+
+            Spacer(StdHorzSpacer)
+
+            Text(
+                text =
+                    buildAnnotatedString {
+                        withLink(
+                            LinkAnnotation.Clickable("cityname") { nav.nav(Route.Geohash(externalId.geohash)) },
+                        ) {
+                            append(cityName)
+                        }
+                    },
+                style =
+                    LocalTextStyle.current.copy(
+                        fontWeight = FontWeight.Bold,
+                    ),
+                maxLines = 1,
+            )
+        }
+    }
+}
+
+@Composable
+private fun BottomRowActions(postViewModel: GeoPostViewModel) {
+    val scrollState = rememberScrollState()
+    Row(
+        modifier =
+            Modifier
+                .horizontalScroll(scrollState)
+                .fillMaxWidth()
+                .height(50.dp),
+        verticalAlignment = CenterVertically,
+    ) {
+        SelectFromGallery(
+            isUploading = postViewModel.isUploadingImage,
+            tint = MaterialTheme.colorScheme.onBackground,
+            modifier = Modifier,
+        ) {
+            postViewModel.selectImage(it)
+        }
+
+        TakePictureButton(
+            onPictureTaken = {
+                postViewModel.selectImage(it)
+            },
+        )
+
+        ForwardZapToButton(postViewModel.wantsForwardZapTo) {
+            postViewModel.wantsForwardZapTo = !postViewModel.wantsForwardZapTo
+        }
+
+        if (postViewModel.canAddZapRaiser) {
+            AddZapraiserButton(postViewModel.wantsZapraiser) {
+                postViewModel.wantsZapraiser = !postViewModel.wantsZapraiser
+            }
+        }
+
+        MarkAsSensitiveButton(postViewModel.wantsToMarkAsSensitive) {
+            postViewModel.toggleMarkAsSensitive()
+        }
+
+        AddSecretEmojiButton(postViewModel.wantsSecretEmoji) {
+            postViewModel.wantsSecretEmoji = !postViewModel.wantsSecretEmoji
+        }
+
+        if (postViewModel.canAddInvoice && postViewModel.hasLnAddress()) {
+            AddLnInvoiceButton(postViewModel.wantsInvoice) {
+                postViewModel.wantsInvoice = !postViewModel.wantsInvoice
+            }
+        }
+    }
+}
+
+@Composable
+fun DisplayPreviews(
+    postViewModel: GeoPostViewModel,
+    accountViewModel: AccountViewModel,
+    nav: INav,
+) {
+    val urlPreviews by postViewModel.urlPreviews.results.collectAsStateWithLifecycle(emptyList())
+
+    if (urlPreviews.isNotEmpty()) {
+        Row(HalfHorzPadding) {
+            if (urlPreviews.size > 1) {
+                LazyRow(Height100Modifier, horizontalArrangement = spacedBy(Size5dp)) {
+                    items(urlPreviews) {
+                        Box(SquaredQuoteBorderModifier) {
+                            PreviewUrl(it, accountViewModel, nav)
+                        }
+                    }
+                }
+            } else {
+                Box(FillWidthQuoteBorderModifier) {
+                    PreviewUrlFillWidth(urlPreviews[0], accountViewModel, nav)
+                }
+            }
+        }
+    }
+}

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

@@ -0,0 +1,663 @@
+/**
+ * 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.geohash
+
+import android.content.Context
+import androidx.compose.runtime.Stable
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.setValue
+import androidx.compose.ui.text.input.TextFieldValue
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.viewModelScope
+import com.vitorpamplona.amethyst.Amethyst
+import com.vitorpamplona.amethyst.R
+import com.vitorpamplona.amethyst.commons.compose.currentWord
+import com.vitorpamplona.amethyst.commons.compose.insertUrlAtCursor
+import com.vitorpamplona.amethyst.commons.compose.replaceCurrentWord
+import com.vitorpamplona.amethyst.model.Account
+import com.vitorpamplona.amethyst.model.LocalCache
+import com.vitorpamplona.amethyst.model.Note
+import com.vitorpamplona.amethyst.model.User
+import com.vitorpamplona.amethyst.model.nip30CustomEmojis.EmojiPackState.EmojiMedia
+import com.vitorpamplona.amethyst.service.uploads.MediaCompressor
+import com.vitorpamplona.amethyst.service.uploads.MultiOrchestrator
+import com.vitorpamplona.amethyst.service.uploads.UploadOrchestrator
+import com.vitorpamplona.amethyst.ui.actions.NewMessageTagger
+import com.vitorpamplona.amethyst.ui.actions.UserSuggestionAnchor
+import com.vitorpamplona.amethyst.ui.actions.mediaServers.ServerName
+import com.vitorpamplona.amethyst.ui.actions.uploads.SelectedMedia
+import com.vitorpamplona.amethyst.ui.actions.uploads.SelectedMediaProcessing
+import com.vitorpamplona.amethyst.ui.note.creators.draftTags.DraftTagState
+import com.vitorpamplona.amethyst.ui.note.creators.emojiSuggestions.EmojiSuggestionState
+import com.vitorpamplona.amethyst.ui.note.creators.messagefield.IMessageField
+import com.vitorpamplona.amethyst.ui.note.creators.previews.PreviewState
+import com.vitorpamplona.amethyst.ui.note.creators.userSuggestions.UserSuggestionState
+import com.vitorpamplona.amethyst.ui.note.creators.zapraiser.IZapRaiser
+import com.vitorpamplona.amethyst.ui.note.creators.zapsplits.IZapField
+import com.vitorpamplona.amethyst.ui.note.creators.zapsplits.SplitBuilder
+import com.vitorpamplona.amethyst.ui.note.creators.zapsplits.toZapSplitSetup
+import com.vitorpamplona.amethyst.ui.screen.loggedIn.AccountViewModel
+import com.vitorpamplona.amethyst.ui.screen.loggedIn.chats.privateDM.send.IMetaAttachments
+import com.vitorpamplona.amethyst.ui.stringRes
+import com.vitorpamplona.quartz.experimental.nip95.data.FileStorageEvent
+import com.vitorpamplona.quartz.experimental.nip95.header.FileStorageHeaderEvent
+import com.vitorpamplona.quartz.nip01Core.core.AddressableEvent
+import com.vitorpamplona.quartz.nip01Core.core.Event
+import com.vitorpamplona.quartz.nip01Core.signers.EventTemplate
+import com.vitorpamplona.quartz.nip01Core.tags.hashtags.hashtags
+import com.vitorpamplona.quartz.nip01Core.tags.references.references
+import com.vitorpamplona.quartz.nip10Notes.content.findHashtags
+import com.vitorpamplona.quartz.nip10Notes.content.findNostrUris
+import com.vitorpamplona.quartz.nip10Notes.content.findURLs
+import com.vitorpamplona.quartz.nip18Reposts.quotes.quotes
+import com.vitorpamplona.quartz.nip18Reposts.quotes.taggedQuoteIds
+import com.vitorpamplona.quartz.nip22Comments.CommentEvent
+import com.vitorpamplona.quartz.nip22Comments.notify
+import com.vitorpamplona.quartz.nip30CustomEmoji.CustomEmoji
+import com.vitorpamplona.quartz.nip30CustomEmoji.EmojiUrlTag
+import com.vitorpamplona.quartz.nip30CustomEmoji.emojis
+import com.vitorpamplona.quartz.nip36SensitiveContent.contentWarning
+import com.vitorpamplona.quartz.nip36SensitiveContent.isSensitive
+import com.vitorpamplona.quartz.nip37Drafts.DraftEvent
+import com.vitorpamplona.quartz.nip57Zaps.splits.zapSplits
+import com.vitorpamplona.quartz.nip57Zaps.zapraiser.zapraiser
+import com.vitorpamplona.quartz.nip57Zaps.zapraiser.zapraiserAmount
+import com.vitorpamplona.quartz.nip73ExternalIds.location.GeohashId
+import com.vitorpamplona.quartz.nip73ExternalIds.location.geohashedScope
+import com.vitorpamplona.quartz.nip92IMeta.IMetaTagBuilder
+import com.vitorpamplona.quartz.nip92IMeta.imetas
+import com.vitorpamplona.quartz.nip94FileMetadata.alt
+import com.vitorpamplona.quartz.nip94FileMetadata.blurhash
+import com.vitorpamplona.quartz.nip94FileMetadata.dims
+import com.vitorpamplona.quartz.nip94FileMetadata.hash
+import com.vitorpamplona.quartz.nip94FileMetadata.magnet
+import com.vitorpamplona.quartz.nip94FileMetadata.mimeType
+import com.vitorpamplona.quartz.nip94FileMetadata.originalHash
+import com.vitorpamplona.quartz.nip94FileMetadata.sensitiveContent
+import com.vitorpamplona.quartz.nip94FileMetadata.size
+import kotlinx.collections.immutable.ImmutableList
+import kotlinx.collections.immutable.toImmutableList
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.flow.collectLatest
+import kotlinx.coroutines.launch
+
+@Stable
+open class GeoPostViewModel :
+    ViewModel(),
+    IMessageField,
+    IZapField,
+    IZapRaiser {
+    val draftTag = DraftTagState()
+
+    init {
+        viewModelScope.launch(Dispatchers.IO) {
+            draftTag.versions.collectLatest {
+                sendDraftSync()
+            }
+        }
+    }
+
+    var accountViewModel: AccountViewModel? = null
+    var account: Account? = null
+
+    var externalIdentity by mutableStateOf<GeohashId?>(null)
+    var replyingTo: Note? by mutableStateOf<Note?>(null)
+
+    val iMetaAttachments = IMetaAttachments()
+    var nip95attachments by mutableStateOf<List<Pair<FileStorageEvent, FileStorageHeaderEvent>>>(emptyList())
+
+    var notifying by mutableStateOf<List<User>?>(null)
+
+    override var message by mutableStateOf(TextFieldValue(""))
+
+    val urlPreviews = PreviewState()
+
+    var isUploadingImage by mutableStateOf(false)
+
+    var userSuggestions: UserSuggestionState? = null
+    var userSuggestionsMainMessage: UserSuggestionAnchor? = null
+
+    var emojiSuggestions: EmojiSuggestionState? = null
+
+    // Images and Videos
+    var multiOrchestrator by mutableStateOf<MultiOrchestrator?>(null)
+
+    // Invoices
+    var canAddInvoice by mutableStateOf(false)
+    var wantsInvoice by mutableStateOf(false)
+
+    var wantsSecretEmoji by mutableStateOf(false)
+
+    // Forward Zap to
+    var wantsForwardZapTo by mutableStateOf(false)
+    override var forwardZapTo = mutableStateOf<SplitBuilder<User>>(SplitBuilder())
+    override var forwardZapToEditting = mutableStateOf(TextFieldValue(""))
+
+    // NSFW, Sensitive
+    var wantsToMarkAsSensitive by mutableStateOf(false)
+
+    // ZapRaiser
+    var canAddZapRaiser by mutableStateOf(false)
+    var wantsZapraiser by mutableStateOf(false)
+    override val zapRaiserAmount = mutableStateOf<Long?>(null)
+
+    var showRelaysDialog by mutableStateOf(false)
+    var relayList by mutableStateOf<ImmutableList<String>?>(null)
+
+    fun lnAddress(): String? = account?.userProfile()?.info?.lnAddress()
+
+    fun hasLnAddress(): Boolean = account?.userProfile()?.info?.lnAddress() != null
+
+    fun user(): User? = account?.userProfile()
+
+    open fun init(accountVM: AccountViewModel) {
+        this.accountViewModel = accountVM
+        this.account = accountVM.account
+        this.canAddInvoice = hasLnAddress()
+        this.canAddZapRaiser = hasLnAddress()
+
+        this.userSuggestions?.reset()
+        this.userSuggestions = UserSuggestionState(accountVM)
+
+        this.emojiSuggestions?.reset()
+        this.emojiSuggestions = EmojiSuggestionState(accountVM)
+    }
+
+    fun newPostFor(externalIdentity: GeohashId) {
+        this.externalIdentity = externalIdentity
+    }
+
+    fun editFromDraft(draft: Note) {
+        val accountViewModel = accountViewModel ?: return
+
+        val noteEvent = draft.event
+        val noteAuthor = draft.author
+
+        if (noteEvent is DraftEvent && noteAuthor != null) {
+            viewModelScope.launch(Dispatchers.IO) {
+                accountViewModel.createTempDraftNote(noteEvent) { innerNote ->
+                    if (innerNote != null) {
+                        val oldTag = (draft.event as? AddressableEvent)?.dTag()
+                        if (oldTag != null) {
+                            draftTag.set(oldTag)
+                        }
+                        loadFromDraft(innerNote)
+                    }
+                }
+            }
+        }
+    }
+
+    open fun reply(post: Note) {
+        val accountViewModel = accountViewModel ?: return
+        val noteEvent = post.event as? CommentEvent ?: return
+        val geohash = noteEvent.geohashedScope() ?: return
+
+        this.replyingTo = post
+        this.externalIdentity = GeohashId(geohash)
+    }
+
+    open fun quote(quote: Note) {
+        val accountViewModel = accountViewModel ?: return
+
+        message = TextFieldValue(message.text + "\nnostr:${quote.toNEvent()}")
+
+        quote.author?.let { quotedUser ->
+            if (quotedUser.pubkeyHex != accountViewModel.userProfile().pubkeyHex) {
+                if (forwardZapTo.value.items.none { it.key.pubkeyHex == quotedUser.pubkeyHex }) {
+                    forwardZapTo.value.addItem(quotedUser)
+                }
+                if (forwardZapTo.value.items.none { it.key.pubkeyHex == accountViewModel.userProfile().pubkeyHex }) {
+                    forwardZapTo.value.addItem(accountViewModel.userProfile())
+                }
+
+                val pos = forwardZapTo.value.items.indexOfFirst { it.key.pubkeyHex == quotedUser.pubkeyHex }
+                forwardZapTo.value.updatePercentage(pos, 0.9f)
+            }
+        }
+
+        if (!forwardZapTo.value.items.isEmpty()) {
+            wantsForwardZapTo = true
+        }
+
+        urlPreviews.update(message)
+    }
+
+    private fun loadFromDraft(draft: Note) {
+        val draftEvent = draft.event ?: return
+        if (draftEvent !is CommentEvent) return
+
+        loadFromDraft(draftEvent)
+    }
+
+    private fun loadFromDraft(draftEvent: CommentEvent) {
+        val geohash = draftEvent.geohashedScope() ?: return
+        this.externalIdentity = GeohashId(geohash)
+
+        canAddInvoice = accountViewModel?.userProfile()?.info?.lnAddress() != null
+        canAddZapRaiser = accountViewModel?.userProfile()?.info?.lnAddress() != null
+        multiOrchestrator = null
+
+        val localfowardZapTo = draftEvent.tags.filter { it.size > 1 && it[0] == "zap" }
+        forwardZapTo.value = SplitBuilder()
+        localfowardZapTo.forEach {
+            val user = LocalCache.getOrCreateUser(it[1])
+            val value = it.last().toFloatOrNull() ?: 0f
+            forwardZapTo.value.addItem(user, value)
+        }
+        forwardZapToEditting.value = TextFieldValue("")
+        wantsForwardZapTo = localfowardZapTo.isNotEmpty()
+
+        wantsToMarkAsSensitive = draftEvent.isSensitive()
+
+        val zapraiser = draftEvent.zapraiserAmount()
+        wantsZapraiser = zapraiser != null
+        zapRaiserAmount.value = null
+        if (zapraiser != null) {
+            zapRaiserAmount.value = zapraiser
+        }
+
+        draftEvent.replyingTo()?.let {
+            replyingTo = LocalCache.getOrCreateNote(it)
+        }
+
+        notifying = draftEvent.rootAuthorKeys().mapNotNull { LocalCache.checkGetOrCreateUser(it) } +
+            draftEvent.replyAuthorKeys().mapNotNull { LocalCache.checkGetOrCreateUser(it) }
+
+        if (forwardZapTo.value.items.isNotEmpty()) {
+            wantsForwardZapTo = true
+        }
+
+        message = TextFieldValue(draftEvent.content)
+
+        iMetaAttachments.addAll(draftEvent.imetas())
+
+        urlPreviews.update(message)
+    }
+
+    suspend fun sendPostSync() {
+        val template = createTemplate() ?: return
+        val relayList = relayList
+
+        if (nip95attachments.isNotEmpty() && relayList != null) {
+            val usedImages = template.tags.taggedQuoteIds().toSet()
+            nip95attachments.forEach {
+                if (usedImages.contains(it.second.id) == true) {
+                    account?.sendNip95Privately(it.first, it.second, relayList)
+                }
+            }
+        }
+
+        accountViewModel?.account?.signAndSendPrivatelyOrBroadcast(
+            template,
+            relayList = { relayList },
+        )
+
+        accountViewModel?.deleteDraft(draftTag.current)
+
+        cancel()
+    }
+
+    suspend fun sendDraftSync() {
+        val accountViewModel = accountViewModel ?: return
+
+        if (message.text.isBlank()) {
+            accountViewModel.account.deleteDraft(draftTag.current)
+        } else {
+            val template = createTemplate() ?: return
+            accountViewModel.account.createAndSendDraft(draftTag.current, template)
+
+            nip95attachments.forEach {
+                account?.sendToPrivateOutboxAndLocal(it.first)
+                account?.sendToPrivateOutboxAndLocal(it.second)
+            }
+        }
+    }
+
+    private suspend fun createTemplate(): EventTemplate<out Event>? {
+        val accountViewModel = accountViewModel ?: return null
+
+        val tagger =
+            NewMessageTagger(
+                message = message.text,
+                dao = accountViewModel,
+            )
+        tagger.run()
+
+        val emojis = findEmoji(tagger.message, account?.emoji?.myEmojis?.value)
+        val urls = findURLs(tagger.message)
+        val usedAttachments = iMetaAttachments.filterIsIn(urls.toSet())
+
+        val zapReceiver = if (wantsForwardZapTo) forwardZapTo.value.toZapSplitSetup() else null
+        val localZapRaiserAmount = if (wantsZapraiser) zapRaiserAmount.value else null
+        val contentWarningReason = if (wantsToMarkAsSensitive) "" else null
+
+        val replyingTo = replyingTo
+
+        val template =
+            if (replyingTo != null) {
+                val eventHint = replyingTo.toEventHint<Event>() ?: return null
+
+                CommentEvent.replyBuilder(
+                    msg = tagger.message,
+                    replyingTo = eventHint,
+                ) {
+                    tagger.pTags?.let { notify(it.map { it.toPTag() }) }
+
+                    hashtags(findHashtags(tagger.message))
+                    references(findURLs(tagger.message))
+                    quotes(findNostrUris(tagger.message))
+
+                    localZapRaiserAmount?.let { zapraiser(it) }
+                    zapReceiver?.let { zapSplits(it) }
+                    contentWarningReason?.let { contentWarning(it) }
+
+                    emojis(emojis)
+                    imetas(usedAttachments)
+                }
+            } else {
+                val externalIdentity = externalIdentity ?: return null
+                CommentEvent.replyExternalIdentity(
+                    msg = tagger.message,
+                    extId = externalIdentity,
+                ) {
+                    tagger.pTags?.let { notify(it.map { it.toPTag() }) }
+
+                    hashtags(findHashtags(tagger.message))
+                    references(findURLs(tagger.message))
+                    quotes(findNostrUris(tagger.message))
+
+                    localZapRaiserAmount?.let { zapraiser(it) }
+                    zapReceiver?.let { zapSplits(it) }
+                    contentWarningReason?.let { contentWarning(it) }
+
+                    emojis(emojis)
+                    imetas(usedAttachments)
+                }
+            }
+
+        return template
+    }
+
+    fun findEmoji(
+        message: String,
+        myEmojiSet: List<EmojiMedia>?,
+    ): List<EmojiUrlTag> {
+        if (myEmojiSet == null) return emptyList()
+        return CustomEmoji.findAllEmojiCodes(message).mapNotNull { possibleEmoji ->
+            myEmojiSet.firstOrNull { it.code == possibleEmoji }?.let { EmojiUrlTag(it.code, it.link.url) }
+        }
+    }
+
+    fun upload(
+        alt: String?,
+        contentWarningReason: String?,
+        mediaQuality: Int,
+        server: ServerName,
+        onError: (title: String, message: String) -> Unit,
+        context: Context,
+    ) {
+        viewModelScope.launch(Dispatchers.Default) {
+            val myAccount = account ?: return@launch
+            val myMultiOrchestrator = multiOrchestrator ?: return@launch
+
+            isUploadingImage = true
+
+            val results =
+                myMultiOrchestrator.upload(
+                    viewModelScope,
+                    alt,
+                    contentWarningReason,
+                    MediaCompressor.intToCompressorQuality(mediaQuality),
+                    server,
+                    myAccount,
+                    context,
+                )
+
+            if (results.allGood) {
+                results.successful.forEach {
+                    if (it.result is UploadOrchestrator.OrchestratorResult.NIP95Result) {
+                        account?.createNip95(it.result.bytes, headerInfo = it.result.fileHeader, alt, contentWarningReason) { nip95 ->
+                            nip95attachments = nip95attachments + nip95
+                            val note = nip95.let { it1 -> account?.consumeNip95(it1.first, it1.second) }
+
+                            note?.let {
+                                message = message.insertUrlAtCursor("nostr:" + it.toNEvent())
+                                urlPreviews.update(message)
+                            }
+                        }
+                    } else if (it.result is UploadOrchestrator.OrchestratorResult.ServerResult) {
+                        val iMeta =
+                            IMetaTagBuilder(it.result.url)
+                                .apply {
+                                    hash(it.result.fileHeader.hash)
+                                    size(it.result.fileHeader.size)
+                                    it.result.fileHeader.mimeType
+                                        ?.let { mimeType(it) }
+                                    it.result.fileHeader.dim
+                                        ?.let { dims(it) }
+                                    it.result.fileHeader.blurHash
+                                        ?.let { blurhash(it.blurhash) }
+                                    it.result.magnet?.let { magnet(it) }
+                                    it.result.uploadedHash?.let { originalHash(it) }
+
+                                    alt?.let { alt(it) }
+                                    contentWarningReason?.let { sensitiveContent(contentWarningReason) }
+                                }.build()
+
+                        iMetaAttachments.replace(iMeta.url, iMeta)
+
+                        message = message.insertUrlAtCursor(it.result.url)
+                        urlPreviews.update(message)
+                    }
+                }
+
+                multiOrchestrator = null
+            } else {
+                val errorMessages = results.errors.map { stringRes(context, it.errorResource, *it.params) }.distinct()
+
+                onError(stringRes(context, R.string.failed_to_upload_media_no_details), errorMessages.joinToString(".\n"))
+            }
+
+            isUploadingImage = false
+        }
+    }
+
+    open fun cancel() {
+        message = TextFieldValue("")
+
+        replyingTo = null
+        externalIdentity = null
+
+        multiOrchestrator = null
+        isUploadingImage = false
+
+        notifying = null
+
+        wantsInvoice = false
+        wantsZapraiser = false
+        zapRaiserAmount.value = null
+
+        wantsForwardZapTo = false
+        wantsToMarkAsSensitive = false
+        wantsSecretEmoji = false
+
+        forwardZapTo.value = SplitBuilder()
+        forwardZapToEditting.value = TextFieldValue("")
+
+        urlPreviews.reset()
+
+        userSuggestions?.reset()
+        userSuggestionsMainMessage = null
+
+        iMetaAttachments.reset()
+
+        emojiSuggestions?.reset()
+
+        showRelaysDialog = false
+
+        reloadRelaySet()
+
+        draftTag.rotate()
+    }
+
+    fun reloadRelaySet() {
+        val account = accountViewModel?.account ?: return
+
+        val nip65 = account.normalizedNIP65WriteRelayList.value
+        val private = account.normalizedPrivateOutBoxRelaySet.value
+        val local = account.settings.localRelayServers
+
+        relayList =
+            if (nip65.isEmpty()) {
+                account.activeWriteRelays().map { it.url }.toImmutableList()
+            } else {
+                val combined: Set<String> = (nip65 + private + local)
+                combined.toImmutableList()
+            }
+    }
+
+    fun deleteMediaToUpload(selected: SelectedMediaProcessing) {
+        this.multiOrchestrator?.remove(selected)
+    }
+
+    open fun removeFromReplyList(userToRemove: User) {
+        notifying = notifying?.filter { it != userToRemove }
+    }
+
+    override fun updateMessage(it: TextFieldValue) {
+        message = it
+        urlPreviews.update(message)
+
+        if (message.selection.collapsed) {
+            val lastWord = message.currentWord()
+
+            userSuggestionsMainMessage = UserSuggestionAnchor.MAIN_MESSAGE
+            userSuggestions?.processCurrentWord(lastWord)
+
+            emojiSuggestions?.processCurrentWord(lastWord)
+        }
+
+        draftTag.newVersion()
+    }
+
+    override fun updateZapForwardTo(newZapForwardTo: TextFieldValue) {
+        forwardZapToEditting.value = newZapForwardTo
+        if (newZapForwardTo.selection.collapsed) {
+            val lastWord = newZapForwardTo.text
+            userSuggestionsMainMessage = UserSuggestionAnchor.FORWARD_ZAPS
+            userSuggestions?.processCurrentWord(lastWord)
+        }
+    }
+
+    open fun autocompleteWithUser(item: User) {
+        userSuggestions?.let { userSuggestions ->
+            if (userSuggestionsMainMessage == UserSuggestionAnchor.MAIN_MESSAGE) {
+                val lastWord = message.currentWord()
+                message = userSuggestions.replaceCurrentWord(message, lastWord, item)
+                urlPreviews.update(message)
+            } else if (userSuggestionsMainMessage == UserSuggestionAnchor.FORWARD_ZAPS) {
+                forwardZapTo.value.addItem(item)
+                forwardZapToEditting.value = TextFieldValue("")
+            }
+
+            userSuggestionsMainMessage = null
+            userSuggestions.reset()
+        }
+
+        draftTag.newVersion()
+    }
+
+    open fun autocompleteWithEmoji(item: EmojiMedia) {
+        val wordToInsert = ":${item.code}:"
+
+        message = message.replaceCurrentWord(wordToInsert)
+        urlPreviews.update(message)
+
+        emojiSuggestions?.reset()
+
+        draftTag.newVersion()
+    }
+
+    open fun autocompleteWithEmojiUrl(item: EmojiMedia) {
+        val wordToInsert = item.link.url + " "
+
+        viewModelScope.launch(Dispatchers.IO) {
+            iMetaAttachments.downloadAndPrepare(
+                item.link.url,
+                { Amethyst.instance.okHttpClients.getHttpClient(accountViewModel?.account?.shouldUseTorForImageDownload(item.link.url) ?: false) },
+            )
+        }
+
+        message = message.replaceCurrentWord(wordToInsert)
+        urlPreviews.update(message)
+
+        emojiSuggestions?.reset()
+
+        draftTag.newVersion()
+    }
+
+    fun canPost(): Boolean =
+        message.text.isNotBlank() &&
+            !isUploadingImage &&
+            !wantsInvoice &&
+            (!wantsZapraiser || zapRaiserAmount.value != null) &&
+            multiOrchestrator == null
+
+    fun insertAtCursor(newElement: String) {
+        message = message.insertUrlAtCursor(newElement)
+    }
+
+    fun selectImage(uris: ImmutableList<SelectedMedia>) {
+        multiOrchestrator = MultiOrchestrator(uris)
+    }
+
+    override fun updateZapPercentage(
+        index: Int,
+        sliderValue: Float,
+    ) {
+        forwardZapTo.value.updatePercentage(index, sliderValue)
+    }
+
+    override fun updateZapFromText() {
+        viewModelScope.launch(Dispatchers.Default) {
+            val tagger =
+                NewMessageTagger(message.text, emptyList(), emptyList(), null, accountViewModel!!)
+            tagger.run()
+            tagger.pTags?.forEach { taggedUser ->
+                if (!forwardZapTo.value.items.any { it.key == taggedUser }) {
+                    forwardZapTo.value.addItem(taggedUser)
+                }
+            }
+        }
+    }
+
+    override fun updateZapRaiserAmount(newAmount: Long?) {
+        zapRaiserAmount.value = newAmount
+        draftTag.newVersion()
+    }
+
+    fun toggleMarkAsSensitive() {
+        wantsToMarkAsSensitive = !wantsToMarkAsSensitive
+        draftTag.newVersion()
+    }
+}

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

@@ -0,0 +1,61 @@
+/**
+ * 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.geohash
+
+import androidx.compose.foundation.layout.size
+import androidx.compose.foundation.shape.CircleShape
+import androidx.compose.material3.FloatingActionButton
+import androidx.compose.material3.Icon
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.unit.dp
+import com.vitorpamplona.amethyst.R
+import com.vitorpamplona.amethyst.ui.navigation.INav
+import com.vitorpamplona.amethyst.ui.navigation.Route
+import com.vitorpamplona.amethyst.ui.painterRes
+import com.vitorpamplona.amethyst.ui.screen.loggedIn.AccountViewModel
+import com.vitorpamplona.amethyst.ui.stringRes
+import com.vitorpamplona.amethyst.ui.theme.Size55Modifier
+
+@Composable
+fun NewGeoPostButton(
+    tag: String,
+    accountViewModel: AccountViewModel,
+    nav: INav,
+) {
+    FloatingActionButton(
+        onClick = {
+            nav.nav(Route.GeoPost(tag))
+        },
+        modifier = Size55Modifier,
+        shape = CircleShape,
+        containerColor = MaterialTheme.colorScheme.primary,
+    ) {
+        Icon(
+            painter = painterRes(R.drawable.ic_compose),
+            contentDescription = stringRes(id = R.string.new_community_note),
+            modifier = Modifier.size(26.dp),
+            tint = Color.White,
+        )
+    }
+}

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/geohash/dal/GeoHashFeedFilter.kt

@@ -27,12 +27,15 @@ import com.vitorpamplona.amethyst.ui.dal.AdditiveFeedFilter
 import com.vitorpamplona.amethyst.ui.dal.DefaultFeedOrder
 import com.vitorpamplona.quartz.experimental.audio.header.AudioHeaderEvent
 import com.vitorpamplona.quartz.experimental.zapPolls.PollNoteEvent
+import com.vitorpamplona.quartz.nip01Core.core.Event
 import com.vitorpamplona.quartz.nip01Core.tags.geohash.isTaggedGeoHash
 import com.vitorpamplona.quartz.nip04Dm.messages.PrivateDmEvent
 import com.vitorpamplona.quartz.nip10Notes.TextNoteEvent
+import com.vitorpamplona.quartz.nip22Comments.CommentEvent
 import com.vitorpamplona.quartz.nip23LongContent.LongTextNoteEvent
 import com.vitorpamplona.quartz.nip28PublicChat.message.ChannelMessageEvent
 import com.vitorpamplona.quartz.nip54Wiki.WikiNoteEvent
+import com.vitorpamplona.quartz.nip73ExternalIds.location.GeohashId
 
 class GeoHashFeedFilter(
     val tag: String,
@@ -58,18 +61,29 @@ class GeoHashFeedFilter(
         it: Note,
         geoTag: String,
     ): Boolean =
-        (
-            it.event is TextNoteEvent ||
-                it.event is LongTextNoteEvent ||
-                it.event is WikiNoteEvent ||
-                it.event is ChannelMessageEvent ||
-                it.event is PrivateDmEvent ||
-                it.event is PollNoteEvent ||
-                it.event is AudioHeaderEvent
-        ) &&
-            it.event?.isTaggedGeoHash(geoTag) == true &&
+        (acceptableViaHashtag(it.event, geoTag) || acceptableViaScope(it.event, geoTag)) &&
             !it.isHiddenFor(account.flowHiddenUsers.value) &&
             account.isAcceptable(it)
 
+    fun acceptableViaHashtag(
+        event: Event?,
+        geohash: String,
+    ): Boolean =
+        (
+            event is TextNoteEvent ||
+                event is LongTextNoteEvent ||
+                event is WikiNoteEvent ||
+                event is ChannelMessageEvent ||
+                event is PrivateDmEvent ||
+                event is PollNoteEvent ||
+                event is AudioHeaderEvent
+        ) &&
+            event.isTaggedGeoHash(geohash) == true
+
+    fun acceptableViaScope(
+        event: Event?,
+        geohash: String,
+    ): Boolean = event is CommentEvent && event.isTaggedScope(geohash, GeohashId::match)
+
     override fun sort(collection: Set<Note>): List<Note> = collection.sortedWith(DefaultFeedOrder)
 }

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/geohash/datasource/FilterPostsByGeohash.kt

@@ -32,6 +32,7 @@ import com.vitorpamplona.quartz.nip22Comments.CommentEvent
 import com.vitorpamplona.quartz.nip23LongContent.LongTextNoteEvent
 import com.vitorpamplona.quartz.nip28PublicChat.message.ChannelMessageEvent
 import com.vitorpamplona.quartz.nip54Wiki.WikiNoteEvent
+import com.vitorpamplona.quartz.nip73ExternalIds.location.GeohashId
 import com.vitorpamplona.quartz.nip84Highlights.HighlightEvent
 import com.vitorpamplona.quartz.nip99Classifieds.ClassifiedsEvent
 
@@ -62,4 +63,17 @@ fun filterPostsByGeohash(
                     since = since,
                 ),
         ),
+        TypedFilter(
+            types = COMMON_FEED_TYPES,
+            filter =
+                SincePerRelayFilter(
+                    tags = mapOf("I" to listOf(GeohashId.toScope(geohash))),
+                    kinds =
+                        listOf(
+                            CommentEvent.KIND,
+                        ),
+                    limit = 200,
+                    since = since,
+                ),
+        ),
     )

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

@@ -0,0 +1,558 @@
+/**
+ * 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.hashtag
+
+import android.net.Uri
+import androidx.compose.foundation.horizontalScroll
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Arrangement.Absolute.spacedBy
+import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.Spacer
+import androidx.compose.foundation.layout.consumeWindowInsets
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.height
+import androidx.compose.foundation.layout.heightIn
+import androidx.compose.foundation.layout.imePadding
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.layout.size
+import androidx.compose.foundation.lazy.LazyRow
+import androidx.compose.foundation.lazy.items
+import androidx.compose.foundation.rememberScrollState
+import androidx.compose.foundation.verticalScroll
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.filled.Tag
+import androidx.compose.material3.ExperimentalMaterial3Api
+import androidx.compose.material3.Icon
+import androidx.compose.material3.IconButton
+import androidx.compose.material3.LocalTextStyle
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Scaffold
+import androidx.compose.material3.Surface
+import androidx.compose.material3.Text
+import androidx.compose.material3.TopAppBar
+import androidx.compose.material3.TopAppBarDefaults
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.LaunchedEffect
+import androidx.compose.runtime.getValue
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Alignment.Companion.CenterVertically
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.platform.LocalContext
+import androidx.compose.ui.text.LinkAnnotation
+import androidx.compose.ui.text.buildAnnotatedString
+import androidx.compose.ui.text.font.FontWeight
+import androidx.compose.ui.text.input.TextFieldValue
+import androidx.compose.ui.text.withLink
+import androidx.compose.ui.unit.dp
+import androidx.lifecycle.compose.collectAsStateWithLifecycle
+import androidx.lifecycle.viewModelScope
+import androidx.lifecycle.viewmodel.compose.viewModel
+import com.vitorpamplona.amethyst.R
+import com.vitorpamplona.amethyst.model.Note
+import com.vitorpamplona.amethyst.ui.actions.RelaySelectionDialogEasy
+import com.vitorpamplona.amethyst.ui.actions.mediaServers.ServerType
+import com.vitorpamplona.amethyst.ui.actions.uploads.SelectFromGallery
+import com.vitorpamplona.amethyst.ui.actions.uploads.SelectedMedia
+import com.vitorpamplona.amethyst.ui.actions.uploads.TakePictureButton
+import com.vitorpamplona.amethyst.ui.navigation.INav
+import com.vitorpamplona.amethyst.ui.navigation.Nav
+import com.vitorpamplona.amethyst.ui.navigation.Route
+import com.vitorpamplona.amethyst.ui.note.BaseUserPicture
+import com.vitorpamplona.amethyst.ui.note.NoteCompose
+import com.vitorpamplona.amethyst.ui.note.creators.contentWarning.ContentSensitivityExplainer
+import com.vitorpamplona.amethyst.ui.note.creators.contentWarning.MarkAsSensitiveButton
+import com.vitorpamplona.amethyst.ui.note.creators.emojiSuggestions.ShowEmojiSuggestionList
+import com.vitorpamplona.amethyst.ui.note.creators.emojiSuggestions.WatchAndLoadMyEmojiList
+import com.vitorpamplona.amethyst.ui.note.creators.invoice.AddLnInvoiceButton
+import com.vitorpamplona.amethyst.ui.note.creators.invoice.InvoiceRequest
+import com.vitorpamplona.amethyst.ui.note.creators.location.AddGeoHashButton
+import com.vitorpamplona.amethyst.ui.note.creators.location.LocationAsHash
+import com.vitorpamplona.amethyst.ui.note.creators.messagefield.MessageField
+import com.vitorpamplona.amethyst.ui.note.creators.previews.PreviewUrl
+import com.vitorpamplona.amethyst.ui.note.creators.previews.PreviewUrlFillWidth
+import com.vitorpamplona.amethyst.ui.note.creators.secretEmoji.AddSecretEmojiButton
+import com.vitorpamplona.amethyst.ui.note.creators.secretEmoji.SecretEmojiRequest
+import com.vitorpamplona.amethyst.ui.note.creators.uploads.ImageVideoDescription
+import com.vitorpamplona.amethyst.ui.note.creators.userSuggestions.ShowUserSuggestionList
+import com.vitorpamplona.amethyst.ui.note.creators.zapraiser.AddZapraiserButton
+import com.vitorpamplona.amethyst.ui.note.creators.zapraiser.ZapRaiserRequest
+import com.vitorpamplona.amethyst.ui.note.creators.zapsplits.ForwardZapTo
+import com.vitorpamplona.amethyst.ui.note.creators.zapsplits.ForwardZapToButton
+import com.vitorpamplona.amethyst.ui.painterRes
+import com.vitorpamplona.amethyst.ui.screen.loggedIn.AccountViewModel
+import com.vitorpamplona.amethyst.ui.screen.loggedIn.CloseButton
+import com.vitorpamplona.amethyst.ui.screen.loggedIn.Notifying
+import com.vitorpamplona.amethyst.ui.screen.loggedIn.PostButton
+import com.vitorpamplona.amethyst.ui.stringRes
+import com.vitorpamplona.amethyst.ui.theme.FillWidthQuoteBorderModifier
+import com.vitorpamplona.amethyst.ui.theme.HalfHorzPadding
+import com.vitorpamplona.amethyst.ui.theme.Height100Modifier
+import com.vitorpamplona.amethyst.ui.theme.Size10dp
+import com.vitorpamplona.amethyst.ui.theme.Size35dp
+import com.vitorpamplona.amethyst.ui.theme.Size5dp
+import com.vitorpamplona.amethyst.ui.theme.SquaredQuoteBorderModifier
+import com.vitorpamplona.amethyst.ui.theme.StdHorzSpacer
+import com.vitorpamplona.amethyst.ui.theme.StdVertSpacer
+import com.vitorpamplona.amethyst.ui.theme.replyModifier
+import com.vitorpamplona.quartz.nip73ExternalIds.topics.HashtagId
+import kotlinx.collections.immutable.persistentListOf
+import kotlinx.collections.immutable.toImmutableList
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.launch
+import kotlinx.coroutines.withContext
+
+@Composable
+fun HashtagPostScreen(
+    hashtag: String? = null,
+    message: String? = null,
+    attachment: Uri? = null,
+    reply: Note? = null,
+    quote: Note? = null,
+    draft: Note? = null,
+    accountViewModel: AccountViewModel,
+    nav: Nav,
+) {
+    val postViewModel: HashtagPostViewModel = viewModel()
+    postViewModel.init(accountViewModel)
+
+    val context = LocalContext.current
+
+    LaunchedEffect(Unit) {
+        postViewModel.reloadRelaySet()
+        hashtag?.let {
+            postViewModel.newPostFor(HashtagId(it))
+        }
+        reply?.let {
+            postViewModel.reply(it)
+        }
+        draft?.let {
+            postViewModel.editFromDraft(it)
+        }
+        quote?.let {
+            postViewModel.quote(it)
+        }
+        message?.ifBlank { null }?.let {
+            postViewModel.updateMessage(TextFieldValue(it))
+        }
+        attachment?.let {
+            withContext(Dispatchers.IO) {
+                val mediaType = context.contentResolver.getType(it)
+                postViewModel.selectImage(persistentListOf(SelectedMedia(it, mediaType)))
+            }
+        }
+    }
+
+    HashtagPostScreenInner(postViewModel, accountViewModel, nav)
+}
+
+@OptIn(ExperimentalMaterial3Api::class)
+@Composable
+fun HashtagPostScreenInner(
+    postViewModel: HashtagPostViewModel,
+    accountViewModel: AccountViewModel,
+    nav: Nav,
+) {
+    WatchAndLoadMyEmojiList(accountViewModel)
+
+    Scaffold(
+        topBar = {
+            TopAppBar(
+                title = {
+                    Row(
+                        modifier = Modifier.fillMaxWidth(),
+                        horizontalArrangement = Arrangement.SpaceBetween,
+                        verticalAlignment = CenterVertically,
+                    ) {
+                        Spacer(modifier = StdHorzSpacer)
+
+                        Box {
+                            IconButton(
+                                modifier = Modifier.align(Alignment.Center),
+                                onClick = { postViewModel.showRelaysDialog = true },
+                            ) {
+                                Icon(
+                                    painter = painterRes(R.drawable.relays),
+                                    contentDescription = stringRes(id = R.string.relay_list_selector),
+                                    modifier = Modifier.height(25.dp),
+                                    tint = MaterialTheme.colorScheme.onBackground,
+                                )
+                            }
+                        }
+                        PostButton(
+                            onPost = {
+                                // uses the accountViewModel scope to avoid cancelling this
+                                // function when the postViewModel is released
+                                accountViewModel.viewModelScope.launch(Dispatchers.IO) {
+                                    postViewModel.sendPostSync()
+                                    nav.popBack()
+                                }
+                            },
+                            isActive = postViewModel.canPost(),
+                        )
+                    }
+                },
+                navigationIcon = {
+                    Row {
+                        Spacer(modifier = StdHorzSpacer)
+                        CloseButton(
+                            onPress = {
+                                // uses the accountViewModel scope to avoid cancelling this
+                                // function when the postViewModel is released
+                                accountViewModel.viewModelScope.launch(Dispatchers.IO) {
+                                    postViewModel.sendDraftSync()
+                                    nav.popBack()
+                                    postViewModel.cancel()
+                                }
+                            },
+                        )
+                    }
+                },
+                colors =
+                    TopAppBarDefaults.topAppBarColors(
+                        containerColor = MaterialTheme.colorScheme.surface,
+                    ),
+            )
+        },
+    ) { pad ->
+        if (postViewModel.showRelaysDialog) {
+            RelaySelectionDialogEasy(
+                preSelectedList = postViewModel.relayList ?: persistentListOf(),
+                onClose = { postViewModel.showRelaysDialog = false },
+                onPost = { postViewModel.relayList = it.map { it.url }.toImmutableList() },
+                accountViewModel = accountViewModel,
+                nav = nav,
+            )
+        }
+        Surface(
+            modifier =
+                Modifier
+                    .padding(pad)
+                    .consumeWindowInsets(pad)
+                    .imePadding(),
+        ) {
+            HashtagPostBody(
+                postViewModel,
+                accountViewModel,
+                nav,
+            )
+        }
+    }
+}
+
+@Composable
+private fun HashtagPostBody(
+    postViewModel: HashtagPostViewModel,
+    accountViewModel: AccountViewModel,
+    nav: Nav,
+) {
+    val scrollState = rememberScrollState()
+
+    Column(Modifier.fillMaxSize()) {
+        Row(
+            modifier =
+                Modifier
+                    .fillMaxWidth()
+                    .padding(
+                        start = Size10dp,
+                        end = Size10dp,
+                    ).weight(1f),
+        ) {
+            Column(Modifier.fillMaxWidth().verticalScroll(scrollState)) {
+                postViewModel.externalIdentity?.let {
+                    Row {
+                        DisplayExternalId(it, accountViewModel, nav)
+                        Spacer(modifier = StdVertSpacer)
+                    }
+                }
+
+                postViewModel.replyingTo?.let {
+                    Row {
+                        NoteCompose(
+                            baseNote = it,
+                            modifier = MaterialTheme.colorScheme.replyModifier,
+                            isQuotedNote = true,
+                            unPackReply = false,
+                            makeItShort = true,
+                            quotesLeft = 1,
+                            accountViewModel = accountViewModel,
+                            nav = nav,
+                        )
+                        Spacer(modifier = StdVertSpacer)
+                    }
+                }
+
+                Row {
+                    Notifying(postViewModel.notifying?.toImmutableList(), accountViewModel) {
+                        postViewModel.removeFromReplyList(it)
+                    }
+                }
+
+                Row(
+                    modifier = Modifier.padding(vertical = Size10dp),
+                ) {
+                    BaseUserPicture(
+                        accountViewModel.userProfile(),
+                        Size35dp,
+                        accountViewModel = accountViewModel,
+                    )
+                    MessageField(
+                        R.string.what_s_on_your_mind,
+                        postViewModel,
+                    )
+                }
+
+                DisplayPreviews(postViewModel, accountViewModel, nav)
+
+                if (postViewModel.wantsToMarkAsSensitive) {
+                    Row(
+                        verticalAlignment = CenterVertically,
+                        modifier = Modifier.padding(vertical = Size5dp, horizontal = Size10dp),
+                    ) {
+                        ContentSensitivityExplainer()
+                    }
+                }
+
+                if (postViewModel.wantsToAddGeoHash) {
+                    Row(
+                        verticalAlignment = Alignment.CenterVertically,
+                        modifier = Modifier.padding(vertical = Size5dp, horizontal = Size10dp),
+                    ) {
+                        LocationAsHash(postViewModel)
+                    }
+                }
+
+                if (postViewModel.wantsForwardZapTo) {
+                    Row(
+                        verticalAlignment = CenterVertically,
+                        modifier = Modifier.padding(top = Size5dp, bottom = Size5dp, start = Size10dp),
+                    ) {
+                        ForwardZapTo(postViewModel, accountViewModel)
+                    }
+                }
+
+                postViewModel.multiOrchestrator?.let {
+                    Row(
+                        verticalAlignment = CenterVertically,
+                        modifier = Modifier.padding(vertical = Size5dp, horizontal = Size10dp),
+                    ) {
+                        val context = LocalContext.current
+                        ImageVideoDescription(
+                            it,
+                            accountViewModel.account.settings.defaultFileServer,
+                            onAdd = { alt, server, sensitiveContent, mediaQuality ->
+                                postViewModel.upload(alt, if (sensitiveContent) "" else null, mediaQuality, server, accountViewModel.toastManager::toast, context)
+                                if (server.type != ServerType.NIP95) {
+                                    accountViewModel.account.settings.changeDefaultFileServer(server)
+                                }
+                            },
+                            onDelete = postViewModel::deleteMediaToUpload,
+                            onCancel = { postViewModel.multiOrchestrator = null },
+                            accountViewModel = accountViewModel,
+                        )
+                    }
+                }
+
+                if (postViewModel.wantsInvoice) {
+                    postViewModel.lnAddress()?.let { lud16 ->
+                        InvoiceRequest(
+                            lud16,
+                            accountViewModel.account.userProfile().pubkeyHex,
+                            accountViewModel,
+                            stringRes(id = R.string.lightning_invoice),
+                            stringRes(id = R.string.lightning_create_and_add_invoice),
+                            onSuccess = {
+                                postViewModel.insertAtCursor(it)
+                                postViewModel.wantsInvoice = false
+                            },
+                            onError = { title, message -> accountViewModel.toastManager.toast(title, message) },
+                        )
+                    }
+                }
+
+                if (postViewModel.wantsSecretEmoji) {
+                    Row(
+                        verticalAlignment = CenterVertically,
+                        modifier = Modifier.padding(vertical = Size5dp, horizontal = Size10dp),
+                    ) {
+                        Column(Modifier.fillMaxWidth()) {
+                            SecretEmojiRequest {
+                                postViewModel.insertAtCursor(it)
+                                postViewModel.wantsSecretEmoji = false
+                            }
+                        }
+                    }
+                }
+
+                if (postViewModel.wantsZapraiser && postViewModel.hasLnAddress()) {
+                    Row(
+                        verticalAlignment = CenterVertically,
+                        modifier = Modifier.padding(vertical = Size5dp, horizontal = Size10dp),
+                    ) {
+                        ZapRaiserRequest(
+                            stringRes(id = R.string.zapraiser),
+                            postViewModel,
+                        )
+                    }
+                }
+            }
+        }
+
+        postViewModel.userSuggestions?.let {
+            ShowUserSuggestionList(
+                it,
+                postViewModel::autocompleteWithUser,
+                accountViewModel,
+                modifier = Modifier.heightIn(0.dp, 300.dp),
+            )
+        }
+
+        postViewModel.emojiSuggestions?.let {
+            ShowEmojiSuggestionList(
+                it,
+                postViewModel::autocompleteWithEmoji,
+                postViewModel::autocompleteWithEmojiUrl,
+                accountViewModel,
+                modifier = Modifier.heightIn(0.dp, 300.dp),
+            )
+        }
+
+        BottomRowActions(postViewModel)
+    }
+}
+
+@Composable
+fun DisplayExternalId(
+    externalId: HashtagId,
+    accountViewModel: AccountViewModel,
+    nav: INav,
+) {
+    Row(modifier = MaterialTheme.colorScheme.replyModifier.padding(10.dp), verticalAlignment = Alignment.CenterVertically) {
+        Icon(
+            imageVector = Icons.Default.Tag,
+            contentDescription = stringRes(id = R.string.hashtag_exclusive),
+            modifier = Modifier.size(20.dp),
+            tint = MaterialTheme.colorScheme.primary,
+        )
+
+        Spacer(StdHorzSpacer)
+
+        Text(
+            text =
+                buildAnnotatedString {
+                    withLink(
+                        LinkAnnotation.Clickable("hashtag") { nav.nav(Route.Hashtag(externalId.topic)) },
+                    ) {
+                        append(externalId.topic)
+                    }
+                },
+            style =
+                LocalTextStyle.current.copy(
+                    fontWeight = FontWeight.Bold,
+                ),
+            maxLines = 1,
+        )
+    }
+}
+
+@Composable
+private fun BottomRowActions(postViewModel: HashtagPostViewModel) {
+    val scrollState = rememberScrollState()
+    Row(
+        modifier =
+            Modifier
+                .horizontalScroll(scrollState)
+                .fillMaxWidth()
+                .height(50.dp),
+        verticalAlignment = CenterVertically,
+    ) {
+        SelectFromGallery(
+            isUploading = postViewModel.isUploadingImage,
+            tint = MaterialTheme.colorScheme.onBackground,
+            modifier = Modifier,
+        ) {
+            postViewModel.selectImage(it)
+        }
+
+        TakePictureButton(
+            onPictureTaken = {
+                postViewModel.selectImage(it)
+            },
+        )
+
+        ForwardZapToButton(postViewModel.wantsForwardZapTo) {
+            postViewModel.wantsForwardZapTo = !postViewModel.wantsForwardZapTo
+        }
+
+        if (postViewModel.canAddZapRaiser) {
+            AddZapraiserButton(postViewModel.wantsZapraiser) {
+                postViewModel.wantsZapraiser = !postViewModel.wantsZapraiser
+            }
+        }
+
+        MarkAsSensitiveButton(postViewModel.wantsToMarkAsSensitive) {
+            postViewModel.toggleMarkAsSensitive()
+        }
+
+        AddGeoHashButton(postViewModel.wantsToAddGeoHash) {
+            postViewModel.wantsToAddGeoHash = !postViewModel.wantsToAddGeoHash
+        }
+
+        AddSecretEmojiButton(postViewModel.wantsSecretEmoji) {
+            postViewModel.wantsSecretEmoji = !postViewModel.wantsSecretEmoji
+        }
+
+        if (postViewModel.canAddInvoice && postViewModel.hasLnAddress()) {
+            AddLnInvoiceButton(postViewModel.wantsInvoice) {
+                postViewModel.wantsInvoice = !postViewModel.wantsInvoice
+            }
+        }
+    }
+}
+
+@Composable
+fun DisplayPreviews(
+    postViewModel: HashtagPostViewModel,
+    accountViewModel: AccountViewModel,
+    nav: INav,
+) {
+    val urlPreviews by postViewModel.urlPreviews.results.collectAsStateWithLifecycle(emptyList())
+
+    if (urlPreviews.isNotEmpty()) {
+        Row(HalfHorzPadding) {
+            if (urlPreviews.size > 1) {
+                LazyRow(Height100Modifier, horizontalArrangement = spacedBy(Size5dp)) {
+                    items(urlPreviews) {
+                        Box(SquaredQuoteBorderModifier) {
+                            PreviewUrl(it, accountViewModel, nav)
+                        }
+                    }
+                }
+            } else {
+                Box(FillWidthQuoteBorderModifier) {
+                    PreviewUrlFillWidth(urlPreviews[0], accountViewModel, nav)
+                }
+            }
+        }
+    }
+}

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

@@ -0,0 +1,690 @@
+/**
+ * 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.hashtag
+
+import android.content.Context
+import androidx.compose.runtime.Stable
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.setValue
+import androidx.compose.ui.text.input.TextFieldValue
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.viewModelScope
+import com.vitorpamplona.amethyst.Amethyst
+import com.vitorpamplona.amethyst.R
+import com.vitorpamplona.amethyst.commons.compose.currentWord
+import com.vitorpamplona.amethyst.commons.compose.insertUrlAtCursor
+import com.vitorpamplona.amethyst.commons.compose.replaceCurrentWord
+import com.vitorpamplona.amethyst.model.Account
+import com.vitorpamplona.amethyst.model.LocalCache
+import com.vitorpamplona.amethyst.model.Note
+import com.vitorpamplona.amethyst.model.User
+import com.vitorpamplona.amethyst.model.nip30CustomEmojis.EmojiPackState.EmojiMedia
+import com.vitorpamplona.amethyst.service.location.LocationState
+import com.vitorpamplona.amethyst.service.uploads.MediaCompressor
+import com.vitorpamplona.amethyst.service.uploads.MultiOrchestrator
+import com.vitorpamplona.amethyst.service.uploads.UploadOrchestrator
+import com.vitorpamplona.amethyst.ui.actions.NewMessageTagger
+import com.vitorpamplona.amethyst.ui.actions.UserSuggestionAnchor
+import com.vitorpamplona.amethyst.ui.actions.mediaServers.ServerName
+import com.vitorpamplona.amethyst.ui.actions.uploads.SelectedMedia
+import com.vitorpamplona.amethyst.ui.actions.uploads.SelectedMediaProcessing
+import com.vitorpamplona.amethyst.ui.note.creators.draftTags.DraftTagState
+import com.vitorpamplona.amethyst.ui.note.creators.emojiSuggestions.EmojiSuggestionState
+import com.vitorpamplona.amethyst.ui.note.creators.location.ILocationGrabber
+import com.vitorpamplona.amethyst.ui.note.creators.messagefield.IMessageField
+import com.vitorpamplona.amethyst.ui.note.creators.previews.PreviewState
+import com.vitorpamplona.amethyst.ui.note.creators.userSuggestions.UserSuggestionState
+import com.vitorpamplona.amethyst.ui.note.creators.zapraiser.IZapRaiser
+import com.vitorpamplona.amethyst.ui.note.creators.zapsplits.IZapField
+import com.vitorpamplona.amethyst.ui.note.creators.zapsplits.SplitBuilder
+import com.vitorpamplona.amethyst.ui.note.creators.zapsplits.toZapSplitSetup
+import com.vitorpamplona.amethyst.ui.screen.loggedIn.AccountViewModel
+import com.vitorpamplona.amethyst.ui.screen.loggedIn.chats.privateDM.send.IMetaAttachments
+import com.vitorpamplona.amethyst.ui.stringRes
+import com.vitorpamplona.quartz.experimental.nip95.data.FileStorageEvent
+import com.vitorpamplona.quartz.experimental.nip95.header.FileStorageHeaderEvent
+import com.vitorpamplona.quartz.nip01Core.core.AddressableEvent
+import com.vitorpamplona.quartz.nip01Core.core.Event
+import com.vitorpamplona.quartz.nip01Core.signers.EventTemplate
+import com.vitorpamplona.quartz.nip01Core.tags.geohash.geohash
+import com.vitorpamplona.quartz.nip01Core.tags.geohash.hasGeohashes
+import com.vitorpamplona.quartz.nip01Core.tags.hashtags.hashtags
+import com.vitorpamplona.quartz.nip01Core.tags.references.references
+import com.vitorpamplona.quartz.nip10Notes.content.findHashtags
+import com.vitorpamplona.quartz.nip10Notes.content.findNostrUris
+import com.vitorpamplona.quartz.nip10Notes.content.findURLs
+import com.vitorpamplona.quartz.nip18Reposts.quotes.quotes
+import com.vitorpamplona.quartz.nip18Reposts.quotes.taggedQuoteIds
+import com.vitorpamplona.quartz.nip22Comments.CommentEvent
+import com.vitorpamplona.quartz.nip22Comments.notify
+import com.vitorpamplona.quartz.nip30CustomEmoji.CustomEmoji
+import com.vitorpamplona.quartz.nip30CustomEmoji.EmojiUrlTag
+import com.vitorpamplona.quartz.nip30CustomEmoji.emojis
+import com.vitorpamplona.quartz.nip36SensitiveContent.contentWarning
+import com.vitorpamplona.quartz.nip36SensitiveContent.isSensitive
+import com.vitorpamplona.quartz.nip37Drafts.DraftEvent
+import com.vitorpamplona.quartz.nip57Zaps.splits.zapSplits
+import com.vitorpamplona.quartz.nip57Zaps.zapraiser.zapraiser
+import com.vitorpamplona.quartz.nip57Zaps.zapraiser.zapraiserAmount
+import com.vitorpamplona.quartz.nip73ExternalIds.topics.HashtagId
+import com.vitorpamplona.quartz.nip73ExternalIds.topics.hashtagScope
+import com.vitorpamplona.quartz.nip92IMeta.IMetaTagBuilder
+import com.vitorpamplona.quartz.nip92IMeta.imetas
+import com.vitorpamplona.quartz.nip94FileMetadata.alt
+import com.vitorpamplona.quartz.nip94FileMetadata.blurhash
+import com.vitorpamplona.quartz.nip94FileMetadata.dims
+import com.vitorpamplona.quartz.nip94FileMetadata.hash
+import com.vitorpamplona.quartz.nip94FileMetadata.magnet
+import com.vitorpamplona.quartz.nip94FileMetadata.mimeType
+import com.vitorpamplona.quartz.nip94FileMetadata.originalHash
+import com.vitorpamplona.quartz.nip94FileMetadata.sensitiveContent
+import com.vitorpamplona.quartz.nip94FileMetadata.size
+import kotlinx.collections.immutable.ImmutableList
+import kotlinx.collections.immutable.toImmutableList
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.flow.StateFlow
+import kotlinx.coroutines.flow.collectLatest
+import kotlinx.coroutines.launch
+
+@Stable
+open class HashtagPostViewModel :
+    ViewModel(),
+    ILocationGrabber,
+    IMessageField,
+    IZapField,
+    IZapRaiser {
+    val draftTag = DraftTagState()
+
+    init {
+        viewModelScope.launch(Dispatchers.IO) {
+            draftTag.versions.collectLatest {
+                sendDraftSync()
+            }
+        }
+    }
+
+    var accountViewModel: AccountViewModel? = null
+    var account: Account? = null
+
+    var externalIdentity by mutableStateOf<HashtagId?>(null)
+    var replyingTo: Note? by mutableStateOf<Note?>(null)
+
+    val iMetaAttachments = IMetaAttachments()
+    var nip95attachments by mutableStateOf<List<Pair<FileStorageEvent, FileStorageHeaderEvent>>>(emptyList())
+
+    var notifying by mutableStateOf<List<User>?>(null)
+
+    override var message by mutableStateOf(TextFieldValue(""))
+
+    val urlPreviews = PreviewState()
+
+    var isUploadingImage by mutableStateOf(false)
+
+    var userSuggestions: UserSuggestionState? = null
+    var userSuggestionsMainMessage: UserSuggestionAnchor? = null
+
+    var emojiSuggestions: EmojiSuggestionState? = null
+
+    // Images and Videos
+    var multiOrchestrator by mutableStateOf<MultiOrchestrator?>(null)
+
+    // Invoices
+    var canAddInvoice by mutableStateOf(false)
+    var wantsInvoice by mutableStateOf(false)
+
+    var wantsSecretEmoji by mutableStateOf(false)
+
+    // Forward Zap to
+    var wantsForwardZapTo by mutableStateOf(false)
+    override var forwardZapTo = mutableStateOf<SplitBuilder<User>>(SplitBuilder())
+    override var forwardZapToEditting = mutableStateOf(TextFieldValue(""))
+
+    // NSFW, Sensitive
+    var wantsToMarkAsSensitive by mutableStateOf(false)
+
+    // GeoHash
+    var wantsToAddGeoHash by mutableStateOf(false)
+    var location: StateFlow<LocationState.LocationResult>? = null
+
+    // ZapRaiser
+    var canAddZapRaiser by mutableStateOf(false)
+    var wantsZapraiser by mutableStateOf(false)
+    override val zapRaiserAmount = mutableStateOf<Long?>(null)
+
+    var showRelaysDialog by mutableStateOf(false)
+    var relayList by mutableStateOf<ImmutableList<String>?>(null)
+
+    fun lnAddress(): String? = account?.userProfile()?.info?.lnAddress()
+
+    fun hasLnAddress(): Boolean = account?.userProfile()?.info?.lnAddress() != null
+
+    fun user(): User? = account?.userProfile()
+
+    open fun init(accountVM: AccountViewModel) {
+        this.accountViewModel = accountVM
+        this.account = accountVM.account
+        this.canAddInvoice = hasLnAddress()
+        this.canAddZapRaiser = hasLnAddress()
+
+        this.userSuggestions?.reset()
+        this.userSuggestions = UserSuggestionState(accountVM)
+
+        this.emojiSuggestions?.reset()
+        this.emojiSuggestions = EmojiSuggestionState(accountVM)
+    }
+
+    fun newPostFor(externalIdentity: HashtagId) {
+        this.externalIdentity = externalIdentity
+    }
+
+    fun editFromDraft(draft: Note) {
+        val accountViewModel = accountViewModel ?: return
+
+        val noteEvent = draft.event
+        val noteAuthor = draft.author
+
+        if (noteEvent is DraftEvent && noteAuthor != null) {
+            viewModelScope.launch(Dispatchers.IO) {
+                accountViewModel.createTempDraftNote(noteEvent) { innerNote ->
+                    if (innerNote != null) {
+                        val oldTag = (draft.event as? AddressableEvent)?.dTag()
+                        if (oldTag != null) {
+                            draftTag.set(oldTag)
+                        }
+                        loadFromDraft(innerNote)
+                    }
+                }
+            }
+        }
+    }
+
+    open fun reply(post: Note) {
+        val accountViewModel = accountViewModel ?: return
+        val noteEvent = post.event as? CommentEvent ?: return
+        val hashtag = noteEvent.hashtagScope() ?: return
+
+        this.replyingTo = post
+        this.externalIdentity = HashtagId(hashtag)
+    }
+
+    open fun quote(quote: Note) {
+        val accountViewModel = accountViewModel ?: return
+
+        message = TextFieldValue(message.text + "\nnostr:${quote.toNEvent()}")
+
+        quote.author?.let { quotedUser ->
+            if (quotedUser.pubkeyHex != accountViewModel.userProfile().pubkeyHex) {
+                if (forwardZapTo.value.items.none { it.key.pubkeyHex == quotedUser.pubkeyHex }) {
+                    forwardZapTo.value.addItem(quotedUser)
+                }
+                if (forwardZapTo.value.items.none { it.key.pubkeyHex == accountViewModel.userProfile().pubkeyHex }) {
+                    forwardZapTo.value.addItem(accountViewModel.userProfile())
+                }
+
+                val pos = forwardZapTo.value.items.indexOfFirst { it.key.pubkeyHex == quotedUser.pubkeyHex }
+                forwardZapTo.value.updatePercentage(pos, 0.9f)
+            }
+        }
+
+        if (!forwardZapTo.value.items.isEmpty()) {
+            wantsForwardZapTo = true
+        }
+
+        urlPreviews.update(message)
+    }
+
+    private fun loadFromDraft(draft: Note) {
+        val draftEvent = draft.event ?: return
+        if (draftEvent !is CommentEvent) return
+
+        loadFromDraft(draftEvent)
+    }
+
+    private fun loadFromDraft(draftEvent: CommentEvent) {
+        val hashtag = draftEvent.hashtagScope() ?: return
+        this.externalIdentity = HashtagId(hashtag)
+
+        canAddInvoice = accountViewModel?.userProfile()?.info?.lnAddress() != null
+        canAddZapRaiser = accountViewModel?.userProfile()?.info?.lnAddress() != null
+        multiOrchestrator = null
+
+        val localfowardZapTo = draftEvent.tags.filter { it.size > 1 && it[0] == "zap" }
+        forwardZapTo.value = SplitBuilder()
+        localfowardZapTo.forEach {
+            val user = LocalCache.getOrCreateUser(it[1])
+            val value = it.last().toFloatOrNull() ?: 0f
+            forwardZapTo.value.addItem(user, value)
+        }
+        forwardZapToEditting.value = TextFieldValue("")
+        wantsForwardZapTo = localfowardZapTo.isNotEmpty()
+
+        wantsToMarkAsSensitive = draftEvent.isSensitive()
+
+        val zapraiser = draftEvent.zapraiserAmount()
+        wantsZapraiser = zapraiser != null
+        zapRaiserAmount.value = null
+        if (zapraiser != null) {
+            zapRaiserAmount.value = zapraiser
+        }
+
+        draftEvent.replyingTo()?.let {
+            replyingTo = LocalCache.getOrCreateNote(it)
+        }
+
+        wantsToAddGeoHash = draftEvent.hasGeohashes()
+
+        notifying = draftEvent.rootAuthorKeys().mapNotNull { LocalCache.checkGetOrCreateUser(it) } +
+            draftEvent.replyAuthorKeys().mapNotNull { LocalCache.checkGetOrCreateUser(it) }
+
+        if (forwardZapTo.value.items.isNotEmpty()) {
+            wantsForwardZapTo = true
+        }
+
+        message = TextFieldValue(draftEvent.content)
+
+        iMetaAttachments.addAll(draftEvent.imetas())
+
+        urlPreviews.update(message)
+    }
+
+    suspend fun sendPostSync() {
+        val template = createTemplate() ?: return
+        val relayList = relayList
+
+        if (nip95attachments.isNotEmpty() && relayList != null) {
+            val usedImages = template.tags.taggedQuoteIds().toSet()
+            nip95attachments.forEach {
+                if (usedImages.contains(it.second.id) == true) {
+                    account?.sendNip95Privately(it.first, it.second, relayList)
+                }
+            }
+        }
+
+        accountViewModel?.account?.signAndSendPrivatelyOrBroadcast(
+            template,
+            relayList = { relayList },
+        )
+
+        accountViewModel?.deleteDraft(draftTag.current)
+
+        cancel()
+    }
+
+    suspend fun sendDraftSync() {
+        val accountViewModel = accountViewModel ?: return
+
+        if (message.text.isBlank()) {
+            accountViewModel.account.deleteDraft(draftTag.current)
+        } else {
+            val template = createTemplate() ?: return
+            accountViewModel.account.createAndSendDraft(draftTag.current, template)
+
+            nip95attachments.forEach {
+                account?.sendToPrivateOutboxAndLocal(it.first)
+                account?.sendToPrivateOutboxAndLocal(it.second)
+            }
+        }
+    }
+
+    private suspend fun createTemplate(): EventTemplate<out Event>? {
+        val accountViewModel = accountViewModel ?: return null
+
+        val tagger =
+            NewMessageTagger(
+                message = message.text,
+                dao = accountViewModel,
+            )
+        tagger.run()
+
+        val geoHash = (location?.value as? LocationState.LocationResult.Success)?.geoHash?.toString()
+
+        val emojis = findEmoji(tagger.message, account?.emoji?.myEmojis?.value)
+        val urls = findURLs(tagger.message)
+        val usedAttachments = iMetaAttachments.filterIsIn(urls.toSet())
+
+        val zapReceiver = if (wantsForwardZapTo) forwardZapTo.value.toZapSplitSetup() else null
+        val localZapRaiserAmount = if (wantsZapraiser) zapRaiserAmount.value else null
+        val contentWarningReason = if (wantsToMarkAsSensitive) "" else null
+
+        val replyingTo = replyingTo
+
+        val template =
+            if (replyingTo != null) {
+                val eventHint = replyingTo.toEventHint<Event>() ?: return null
+
+                CommentEvent.replyBuilder(
+                    msg = tagger.message,
+                    replyingTo = eventHint,
+                ) {
+                    tagger.pTags?.let { notify(it.map { it.toPTag() }) }
+
+                    hashtags(findHashtags(tagger.message))
+                    references(findURLs(tagger.message))
+                    quotes(findNostrUris(tagger.message))
+
+                    localZapRaiserAmount?.let { zapraiser(it) }
+                    zapReceiver?.let { zapSplits(it) }
+                    contentWarningReason?.let { contentWarning(it) }
+
+                    emojis(emojis)
+                    imetas(usedAttachments)
+                    geoHash?.let { geohash(it) }
+                }
+            } else {
+                val externalIdentity = externalIdentity ?: return null
+                CommentEvent.replyExternalIdentity(
+                    msg = tagger.message,
+                    extId = externalIdentity,
+                ) {
+                    tagger.pTags?.let { notify(it.map { it.toPTag() }) }
+
+                    hashtags(findHashtags(tagger.message))
+                    references(findURLs(tagger.message))
+                    quotes(findNostrUris(tagger.message))
+
+                    localZapRaiserAmount?.let { zapraiser(it) }
+                    zapReceiver?.let { zapSplits(it) }
+                    contentWarningReason?.let { contentWarning(it) }
+
+                    emojis(emojis)
+                    imetas(usedAttachments)
+                    geoHash?.let { geohash(it) }
+                }
+            }
+
+        return template
+    }
+
+    fun findEmoji(
+        message: String,
+        myEmojiSet: List<EmojiMedia>?,
+    ): List<EmojiUrlTag> {
+        if (myEmojiSet == null) return emptyList()
+        return CustomEmoji.findAllEmojiCodes(message).mapNotNull { possibleEmoji ->
+            myEmojiSet.firstOrNull { it.code == possibleEmoji }?.let { EmojiUrlTag(it.code, it.link.url) }
+        }
+    }
+
+    fun upload(
+        alt: String?,
+        contentWarningReason: String?,
+        mediaQuality: Int,
+        server: ServerName,
+        onError: (title: String, message: String) -> Unit,
+        context: Context,
+    ) {
+        viewModelScope.launch(Dispatchers.Default) {
+            val myAccount = account ?: return@launch
+            val myMultiOrchestrator = multiOrchestrator ?: return@launch
+
+            isUploadingImage = true
+
+            val results =
+                myMultiOrchestrator.upload(
+                    viewModelScope,
+                    alt,
+                    contentWarningReason,
+                    MediaCompressor.intToCompressorQuality(mediaQuality),
+                    server,
+                    myAccount,
+                    context,
+                )
+
+            if (results.allGood) {
+                results.successful.forEach {
+                    if (it.result is UploadOrchestrator.OrchestratorResult.NIP95Result) {
+                        account?.createNip95(it.result.bytes, headerInfo = it.result.fileHeader, alt, contentWarningReason) { nip95 ->
+                            nip95attachments = nip95attachments + nip95
+                            val note = nip95.let { it1 -> account?.consumeNip95(it1.first, it1.second) }
+
+                            note?.let {
+                                message = message.insertUrlAtCursor("nostr:" + it.toNEvent())
+                                urlPreviews.update(message)
+                            }
+                        }
+                    } else if (it.result is UploadOrchestrator.OrchestratorResult.ServerResult) {
+                        val iMeta =
+                            IMetaTagBuilder(it.result.url)
+                                .apply {
+                                    hash(it.result.fileHeader.hash)
+                                    size(it.result.fileHeader.size)
+                                    it.result.fileHeader.mimeType
+                                        ?.let { mimeType(it) }
+                                    it.result.fileHeader.dim
+                                        ?.let { dims(it) }
+                                    it.result.fileHeader.blurHash
+                                        ?.let { blurhash(it.blurhash) }
+                                    it.result.magnet?.let { magnet(it) }
+                                    it.result.uploadedHash?.let { originalHash(it) }
+
+                                    alt?.let { alt(it) }
+                                    contentWarningReason?.let { sensitiveContent(contentWarningReason) }
+                                }.build()
+
+                        iMetaAttachments.replace(iMeta.url, iMeta)
+
+                        message = message.insertUrlAtCursor(it.result.url)
+                        urlPreviews.update(message)
+                    }
+                }
+
+                multiOrchestrator = null
+            } else {
+                val errorMessages = results.errors.map { stringRes(context, it.errorResource, *it.params) }.distinct()
+
+                onError(stringRes(context, R.string.failed_to_upload_media_no_details), errorMessages.joinToString(".\n"))
+            }
+
+            isUploadingImage = false
+        }
+    }
+
+    open fun cancel() {
+        message = TextFieldValue("")
+
+        replyingTo = null
+        externalIdentity = null
+
+        multiOrchestrator = null
+        isUploadingImage = false
+
+        notifying = null
+
+        wantsInvoice = false
+        wantsZapraiser = false
+        zapRaiserAmount.value = null
+
+        wantsForwardZapTo = false
+        wantsToMarkAsSensitive = false
+        wantsToAddGeoHash = false
+        wantsSecretEmoji = false
+
+        forwardZapTo.value = SplitBuilder()
+        forwardZapToEditting.value = TextFieldValue("")
+
+        urlPreviews.reset()
+
+        userSuggestions?.reset()
+        userSuggestionsMainMessage = null
+
+        iMetaAttachments.reset()
+
+        emojiSuggestions?.reset()
+
+        showRelaysDialog = false
+
+        reloadRelaySet()
+
+        draftTag.rotate()
+    }
+
+    fun reloadRelaySet() {
+        val account = accountViewModel?.account ?: return
+
+        val nip65 = account.normalizedNIP65WriteRelayList.value
+        val private = account.normalizedPrivateOutBoxRelaySet.value
+        val local = account.settings.localRelayServers
+
+        relayList =
+            if (nip65.isEmpty()) {
+                account.activeWriteRelays().map { it.url }.toImmutableList()
+            } else {
+                val combined: Set<String> = (nip65 + private + local)
+                combined.toImmutableList()
+            }
+    }
+
+    fun deleteMediaToUpload(selected: SelectedMediaProcessing) {
+        this.multiOrchestrator?.remove(selected)
+    }
+
+    open fun removeFromReplyList(userToRemove: User) {
+        notifying = notifying?.filter { it != userToRemove }
+    }
+
+    override fun updateMessage(it: TextFieldValue) {
+        message = it
+        urlPreviews.update(message)
+
+        if (message.selection.collapsed) {
+            val lastWord = message.currentWord()
+
+            userSuggestionsMainMessage = UserSuggestionAnchor.MAIN_MESSAGE
+            userSuggestions?.processCurrentWord(lastWord)
+
+            emojiSuggestions?.processCurrentWord(lastWord)
+        }
+
+        draftTag.newVersion()
+    }
+
+    override fun updateZapForwardTo(newZapForwardTo: TextFieldValue) {
+        forwardZapToEditting.value = newZapForwardTo
+        if (newZapForwardTo.selection.collapsed) {
+            val lastWord = newZapForwardTo.text
+            userSuggestionsMainMessage = UserSuggestionAnchor.FORWARD_ZAPS
+            userSuggestions?.processCurrentWord(lastWord)
+        }
+    }
+
+    open fun autocompleteWithUser(item: User) {
+        userSuggestions?.let { userSuggestions ->
+            if (userSuggestionsMainMessage == UserSuggestionAnchor.MAIN_MESSAGE) {
+                val lastWord = message.currentWord()
+                message = userSuggestions.replaceCurrentWord(message, lastWord, item)
+                urlPreviews.update(message)
+            } else if (userSuggestionsMainMessage == UserSuggestionAnchor.FORWARD_ZAPS) {
+                forwardZapTo.value.addItem(item)
+                forwardZapToEditting.value = TextFieldValue("")
+            }
+
+            userSuggestionsMainMessage = null
+            userSuggestions.reset()
+        }
+
+        draftTag.newVersion()
+    }
+
+    open fun autocompleteWithEmoji(item: EmojiMedia) {
+        val wordToInsert = ":${item.code}:"
+
+        message = message.replaceCurrentWord(wordToInsert)
+        urlPreviews.update(message)
+
+        emojiSuggestions?.reset()
+
+        draftTag.newVersion()
+    }
+
+    open fun autocompleteWithEmojiUrl(item: EmojiMedia) {
+        val wordToInsert = item.link.url + " "
+
+        viewModelScope.launch(Dispatchers.IO) {
+            iMetaAttachments.downloadAndPrepare(
+                item.link.url,
+                { Amethyst.instance.okHttpClients.getHttpClient(accountViewModel?.account?.shouldUseTorForImageDownload(item.link.url) ?: false) },
+            )
+        }
+
+        message = message.replaceCurrentWord(wordToInsert)
+        urlPreviews.update(message)
+
+        emojiSuggestions?.reset()
+
+        draftTag.newVersion()
+    }
+
+    fun canPost(): Boolean =
+        message.text.isNotBlank() &&
+            !isUploadingImage &&
+            !wantsInvoice &&
+            (!wantsZapraiser || zapRaiserAmount.value != null) &&
+            multiOrchestrator == null
+
+    fun insertAtCursor(newElement: String) {
+        message = message.insertUrlAtCursor(newElement)
+    }
+
+    fun selectImage(uris: ImmutableList<SelectedMedia>) {
+        multiOrchestrator = MultiOrchestrator(uris)
+    }
+
+    override fun updateZapPercentage(
+        index: Int,
+        sliderValue: Float,
+    ) {
+        forwardZapTo.value.updatePercentage(index, sliderValue)
+    }
+
+    override fun updateZapFromText() {
+        viewModelScope.launch(Dispatchers.Default) {
+            val tagger =
+                NewMessageTagger(message.text, emptyList(), emptyList(), null, accountViewModel!!)
+            tagger.run()
+            tagger.pTags?.forEach { taggedUser ->
+                if (!forwardZapTo.value.items.any { it.key == taggedUser }) {
+                    forwardZapTo.value.addItem(taggedUser)
+                }
+            }
+        }
+    }
+
+    override fun updateZapRaiserAmount(newAmount: Long?) {
+        zapRaiserAmount.value = newAmount
+        draftTag.newVersion()
+    }
+
+    fun toggleMarkAsSensitive() {
+        wantsToMarkAsSensitive = !wantsToMarkAsSensitive
+        draftTag.newVersion()
+    }
+
+    override fun locationFlow(): StateFlow<LocationState.LocationResult> {
+        if (location == null) {
+            location = locationManager().geohashStateFlow
+        }
+
+        return location!!
+    }
+
+    override fun locationManager(): LocationState = Amethyst.instance.locationManager
+}

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

@@ -98,6 +98,9 @@ fun HashtagScreen(
                 popBack = nav::popBack,
             )
         },
+        floatingButton = {
+            NewHashtagPostButton(tag, accountViewModel, nav)
+        },
         accountViewModel = accountViewModel,
     ) {
         Column(Modifier.padding(it)) {

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

@@ -0,0 +1,61 @@
+/**
+ * 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.hashtag
+
+import androidx.compose.foundation.layout.size
+import androidx.compose.foundation.shape.CircleShape
+import androidx.compose.material3.FloatingActionButton
+import androidx.compose.material3.Icon
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.unit.dp
+import com.vitorpamplona.amethyst.R
+import com.vitorpamplona.amethyst.ui.navigation.INav
+import com.vitorpamplona.amethyst.ui.navigation.Route
+import com.vitorpamplona.amethyst.ui.painterRes
+import com.vitorpamplona.amethyst.ui.screen.loggedIn.AccountViewModel
+import com.vitorpamplona.amethyst.ui.stringRes
+import com.vitorpamplona.amethyst.ui.theme.Size55Modifier
+
+@Composable
+fun NewHashtagPostButton(
+    tag: String,
+    accountViewModel: AccountViewModel,
+    nav: INav,
+) {
+    FloatingActionButton(
+        onClick = {
+            nav.nav(Route.HashtagPost(tag))
+        },
+        modifier = Size55Modifier,
+        shape = CircleShape,
+        containerColor = MaterialTheme.colorScheme.primary,
+    ) {
+        Icon(
+            painter = painterRes(R.drawable.ic_compose),
+            contentDescription = stringRes(id = R.string.new_community_note),
+            modifier = Modifier.size(26.dp),
+            tint = Color.White,
+        )
+    }
+}

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/hashtag/dal/HashtagFeedFilter.kt

@@ -27,14 +27,17 @@ import com.vitorpamplona.amethyst.ui.dal.AdditiveFeedFilter
 import com.vitorpamplona.amethyst.ui.dal.DefaultFeedOrder
 import com.vitorpamplona.quartz.experimental.audio.header.AudioHeaderEvent
 import com.vitorpamplona.quartz.experimental.zapPolls.PollNoteEvent
+import com.vitorpamplona.quartz.nip01Core.core.Event
 import com.vitorpamplona.quartz.nip01Core.tags.hashtags.isTaggedHash
 import com.vitorpamplona.quartz.nip04Dm.messages.PrivateDmEvent
 import com.vitorpamplona.quartz.nip10Notes.TextNoteEvent
 import com.vitorpamplona.quartz.nip18Reposts.GenericRepostEvent
 import com.vitorpamplona.quartz.nip18Reposts.RepostEvent
+import com.vitorpamplona.quartz.nip22Comments.CommentEvent
 import com.vitorpamplona.quartz.nip23LongContent.LongTextNoteEvent
 import com.vitorpamplona.quartz.nip28PublicChat.message.ChannelMessageEvent
 import com.vitorpamplona.quartz.nip54Wiki.WikiNoteEvent
+import com.vitorpamplona.quartz.nip73ExternalIds.topics.HashtagId
 
 class HashtagFeedFilter(
     val tag: String,
@@ -60,20 +63,31 @@ class HashtagFeedFilter(
         it: Note,
         hashTag: String,
     ): Boolean =
-        (
-            it.event is TextNoteEvent ||
-                it.event is RepostEvent ||
-                it.event is GenericRepostEvent ||
-                it.event is LongTextNoteEvent ||
-                it.event is WikiNoteEvent ||
-                it.event is ChannelMessageEvent ||
-                it.event is PrivateDmEvent ||
-                it.event is PollNoteEvent ||
-                it.event is AudioHeaderEvent
-        ) &&
-            it.event?.isTaggedHash(hashTag) == true &&
+        (acceptableViaHashtag(it.event, hashTag) || acceptableViaScope(it.event, hashTag)) &&
             !it.isHiddenFor(account.flowHiddenUsers.value) &&
             account.isAcceptable(it)
 
+    fun acceptableViaHashtag(
+        event: Event?,
+        hashTag: String,
+    ): Boolean =
+        (
+            event is TextNoteEvent ||
+                event is RepostEvent ||
+                event is GenericRepostEvent ||
+                event is LongTextNoteEvent ||
+                event is WikiNoteEvent ||
+                event is ChannelMessageEvent ||
+                event is PrivateDmEvent ||
+                event is PollNoteEvent ||
+                event is AudioHeaderEvent
+        ) &&
+            event.isTaggedHash(hashTag) == true
+
+    fun acceptableViaScope(
+        event: Event?,
+        hashTag: String,
+    ): Boolean = event is CommentEvent && event.isTaggedScope(hashTag, HashtagId::match)
+
     override fun sort(collection: Set<Note>): List<Note> = collection.sortedWith(DefaultFeedOrder)
 }

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/hashtag/datasource/FilterPostsByHashtags.kt

@@ -35,6 +35,7 @@ import com.vitorpamplona.quartz.nip23LongContent.LongTextNoteEvent
 import com.vitorpamplona.quartz.nip28PublicChat.message.ChannelMessageEvent
 import com.vitorpamplona.quartz.nip53LiveActivities.chat.LiveActivitiesChatMessageEvent
 import com.vitorpamplona.quartz.nip54Wiki.WikiNoteEvent
+import com.vitorpamplona.quartz.nip73ExternalIds.topics.HashtagId
 import com.vitorpamplona.quartz.nip84Highlights.HighlightEvent
 import com.vitorpamplona.quartz.nip99Classifieds.ClassifiedsEvent
 
@@ -81,5 +82,15 @@ fun filterPostsByHashtags(
                     since = since,
                 ),
         ),
+        TypedFilter(
+            types = COMMON_FEED_TYPES,
+            filter =
+                SincePerRelayFilter(
+                    tags = mapOf("I" to listOf(HashtagId.toScope(hashtag))),
+                    kinds = listOf(CommentEvent.KIND),
+                    limit = 200,
+                    since = since,
+                ),
+        ),
     )
 }

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

@@ -53,10 +53,12 @@ import androidx.compose.ui.Modifier
 import androidx.compose.ui.graphics.Color
 import androidx.compose.ui.tooling.preview.Preview
 import androidx.lifecycle.compose.collectAsStateWithLifecycle
+import com.vitorpamplona.amethyst.Amethyst
 import com.vitorpamplona.amethyst.R
 import com.vitorpamplona.amethyst.model.AROUND_ME
 import com.vitorpamplona.amethyst.model.EphemeralChatChannel
 import com.vitorpamplona.amethyst.service.OnlineChecker
+import com.vitorpamplona.amethyst.service.location.LocationState
 import com.vitorpamplona.amethyst.ui.actions.CrossfadeIfEnabled
 import com.vitorpamplona.amethyst.ui.feeds.ChannelFeedContentState
 import com.vitorpamplona.amethyst.ui.feeds.ChannelFeedState
@@ -75,6 +77,7 @@ import com.vitorpamplona.amethyst.ui.navigation.INav
 import com.vitorpamplona.amethyst.ui.navigation.Route
 import com.vitorpamplona.amethyst.ui.note.NoteCompose
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.AccountViewModel
+import com.vitorpamplona.amethyst.ui.screen.loggedIn.geohash.NewGeoPostButton
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.home.datasource.HomeFilterAssemblerSubscription
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.home.live.RenderEphemeralBubble
 import com.vitorpamplona.amethyst.ui.stringRes
@@ -199,11 +202,7 @@ private fun HomePages(
             }
         },
         floatingButton = {
-            val list =
-                accountViewModel.account.settings.defaultHomeFollowList
-                    .collectAsStateWithLifecycle()
-
-            NewNoteButton(nav, list.value == AROUND_ME)
+            HomeScreenFloatingButton(accountViewModel, nav)
         },
         accountViewModel = accountViewModel,
     ) {
@@ -224,6 +223,26 @@ private fun HomePages(
     }
 }
 
+@Composable
+fun HomeScreenFloatingButton(
+    accountViewModel: AccountViewModel,
+    nav: INav,
+) {
+    val list = accountViewModel.account.settings.defaultHomeFollowList.collectAsStateWithLifecycle()
+
+    if (list.value == AROUND_ME) {
+        val location by Amethyst.instance.locationManager.geohashStateFlow.collectAsStateWithLifecycle()
+
+        when (val myLocation = location) {
+            is LocationState.LocationResult.Success -> NewGeoPostButton(myLocation.geoHash.toString(), accountViewModel, nav)
+            is LocationState.LocationResult.LackPermission -> { }
+            is LocationState.LocationResult.Loading -> { }
+        }
+    } else {
+        NewNoteButton(nav)
+    }
+}
+
 @Composable
 fun HomeFeeds(
     feedState: FeedContentState,

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

@@ -37,13 +37,10 @@ import com.vitorpamplona.amethyst.ui.stringRes
 import com.vitorpamplona.amethyst.ui.theme.Size55Modifier
 
 @Composable
-fun NewNoteButton(
-    nav: INav,
-    enableGeolocation: Boolean = false,
-) {
+fun NewNoteButton(nav: INav) {
     FloatingActionButton(
         onClick = {
-            nav.nav(Route.NewPost(enableGeolocation = enableGeolocation))
+            nav.nav(Route.NewPost())
         },
         modifier = Size55Modifier,
         shape = CircleShape,

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/home/datasource/mixGeohashHashtagsCommunities/MixGeohashHashtagsCommunityEoseManager.kt

@@ -25,6 +25,7 @@ import com.vitorpamplona.amethyst.service.relayClient.eoseManagers.PerUserEoseMa
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.home.datasource.HomeQueryState
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.home.datasource.nip01Geohash.filterHomePostsByGeohashes
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.home.datasource.nip01Hashtags.filterHomePostsByHashtags
+import com.vitorpamplona.amethyst.ui.screen.loggedIn.home.datasource.nip22Comments.filterHomePostsByScopes
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.home.datasource.nip72Communities.filterHomePostsFromCommunities
 import com.vitorpamplona.ammolite.relays.NostrClient
 import com.vitorpamplona.ammolite.relays.TypedFilter
@@ -46,6 +47,8 @@ class MixGeohashHashtagsCommunityEoseManager(
         listOfNotNull(
             filterHomePostsByHashtags(key.followLists()?.hashtags, since),
             filterHomePostsByGeohashes(key.followLists()?.geotags, since),
+            filterHomePostsByScopes(key.followLists()?.hashtagScopes, since),
+            filterHomePostsByScopes(key.followLists()?.geotagScopes, since),
             filterHomePostsFromCommunities(key.followLists()?.addresses, since),
         ).flatten()
 

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/home/datasource/nip01Geohash/GeohashEventsEoseManager.kt

@@ -23,6 +23,7 @@ package com.vitorpamplona.amethyst.ui.screen.loggedIn.home.datasource.nip01Geoha
 import com.vitorpamplona.amethyst.model.User
 import com.vitorpamplona.amethyst.service.relayClient.eoseManagers.PerUserEoseManager
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.home.datasource.HomeQueryState
+import com.vitorpamplona.amethyst.ui.screen.loggedIn.home.datasource.nip22Comments.filterHomePostsByScopes
 import com.vitorpamplona.ammolite.relays.NostrClient
 import com.vitorpamplona.ammolite.relays.TypedFilter
 import com.vitorpamplona.ammolite.relays.datasources.Subscription
@@ -31,6 +32,7 @@ import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.Job
 import kotlinx.coroutines.flow.collectLatest
 import kotlinx.coroutines.launch
+import kotlin.collections.flatten
 
 class GeohashEventsEoseManager(
     client: NostrClient,
@@ -39,7 +41,11 @@ class GeohashEventsEoseManager(
     override fun updateFilter(
         key: HomeQueryState,
         since: Map<String, EOSETime>?,
-    ): List<TypedFilter>? = filterHomePostsByGeohashes(key.followLists()?.geotags, since)
+    ): List<TypedFilter>? =
+        listOfNotNull(
+            filterHomePostsByGeohashes(key.followLists()?.geotags, since),
+            filterHomePostsByScopes(key.followLists()?.geotagScopes, since),
+        ).flatten()
 
     override fun user(query: HomeQueryState) = query.account.userProfile()
 

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/home/datasource/nip01Hashtags/HashtagEventsFilterSubAssembler.kt

@@ -23,6 +23,7 @@ package com.vitorpamplona.amethyst.ui.screen.loggedIn.home.datasource.nip01Hasht
 import com.vitorpamplona.amethyst.model.User
 import com.vitorpamplona.amethyst.service.relayClient.eoseManagers.PerUserEoseManager
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.home.datasource.HomeQueryState
+import com.vitorpamplona.amethyst.ui.screen.loggedIn.home.datasource.nip22Comments.filterHomePostsByScopes
 import com.vitorpamplona.ammolite.relays.NostrClient
 import com.vitorpamplona.ammolite.relays.TypedFilter
 import com.vitorpamplona.ammolite.relays.datasources.Subscription
@@ -40,10 +41,13 @@ class HashtagEventsFilterSubAssembler(
         key: HomeQueryState,
         since: Map<String, EOSETime>?,
     ): List<TypedFilter>? =
-        filterHomePostsByHashtags(
-            key.followLists()?.hashtags,
-            since,
-        )
+        listOfNotNull(
+            filterHomePostsByHashtags(
+                key.followLists()?.hashtags,
+                since,
+            ),
+            filterHomePostsByScopes(key.followLists()?.hashtagScopes, since),
+        ).flatten()
 
     override fun user(query: HomeQueryState) = query.account.userProfile()
 

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/home/datasource/nip22Comments/FilterPostsByGeohashScopes.kt

@@ -0,0 +1,47 @@
+/**
+ * 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.home.datasource.nip22Comments
+
+import com.vitorpamplona.ammolite.relays.FeedType
+import com.vitorpamplona.ammolite.relays.TypedFilter
+import com.vitorpamplona.ammolite.relays.filters.EOSETime
+import com.vitorpamplona.ammolite.relays.filters.SincePerRelayFilter
+import com.vitorpamplona.quartz.nip22Comments.CommentEvent
+
+fun filterHomePostsByScopes(
+    scopesToLoad: Set<String>?,
+    since: Map<String, EOSETime>?,
+): List<TypedFilter>? {
+    if (scopesToLoad == null || scopesToLoad.isEmpty()) return null
+
+    return listOf(
+        TypedFilter(
+            types = setOf(FeedType.FOLLOWS),
+            filter =
+                SincePerRelayFilter(
+                    kinds = listOf(CommentEvent.KIND),
+                    tags = mapOf("I" to scopesToLoad.toList()),
+                    limit = 100,
+                    since = since,
+                ),
+        ),
+    )
+}

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

@@ -181,7 +181,7 @@ import com.vitorpamplona.quartz.experimental.nip95.header.FileStorageHeaderEvent
 import com.vitorpamplona.quartz.experimental.zapPolls.PollNoteEvent
 import com.vitorpamplona.quartz.nip01Core.core.Event
 import com.vitorpamplona.quartz.nip01Core.tags.addressables.isTaggedAddressableKind
-import com.vitorpamplona.quartz.nip01Core.tags.geohash.getGeoHash
+import com.vitorpamplona.quartz.nip01Core.tags.geohash.geoHashOrScope
 import com.vitorpamplona.quartz.nip04Dm.messages.PrivateDmEvent
 import com.vitorpamplona.quartz.nip13Pow.strongPoWOrNull
 import com.vitorpamplona.quartz.nip17Dm.files.ChatMessageEncryptedFileHeaderEvent
@@ -477,7 +477,7 @@ private fun FullBleedNoteCompose(
                         nav,
                     )
 
-                    val geo = remember { noteEvent.getGeoHash() }
+                    val geo = remember { noteEvent.geoHashOrScope() }
                     if (geo != null) {
                         DisplayLocation(geo, nav)
                     }

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

@@ -733,6 +733,10 @@
     <string name="geohash_exclusive">Location-exclusive Post</string>
     <string name="geohash_exclusive_explainer">Only followers of the location will see it. Your general followers won\'t see it.</string>
 
+    <string name="hashtag_exclusive">Hashtag-exclusive Post</string>
+    <string name="hashtag_exclusive_explainer">Only followers of the hashtag will see it. Your general followers won\'t see it.</string>
+
+
     <string name="loading_location">Loading location</string>
     <string name="lack_location_permissions">No Location Permissions</string>
 
@@ -988,6 +992,7 @@
     <string name="new_short">New Shorts: images or videos</string>
     <string name="new_community_note">New Community Note</string>
     <string name="new_product">New Product</string>
+    <string name="new_exclusive_geo_note">New Geo-Exclusive Post</string>
 
     <string name="open_all_reactions_to_this_post">Open all reactions to this post</string>
     <string name="close_all_reactions_to_this_post">Close all reactions to this post</string>

quartz/src/androidTest/java/com/vitorpamplona/quartz/nip22Comments/GeolocatedComments.kt

@@ -0,0 +1,95 @@
+/**
+ * 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.quartz.nip22Comments
+
+import androidx.test.ext.junit.runners.AndroidJUnit4
+import com.vitorpamplona.quartz.nip01Core.core.hexToByteArray
+import com.vitorpamplona.quartz.nip01Core.crypto.KeyPair
+import com.vitorpamplona.quartz.nip01Core.signers.NostrSignerSync
+import com.vitorpamplona.quartz.nip01Core.verify
+import com.vitorpamplona.quartz.nip73ExternalIds.location.GeohashId
+import junit.framework.TestCase.assertEquals
+import junit.framework.TestCase.assertFalse
+import junit.framework.TestCase.assertTrue
+import org.junit.Test
+import org.junit.runner.RunWith
+
+@RunWith(AndroidJUnit4::class)
+class GeolocatedComments {
+    private val privateKey = "f410f88bcec6cbfda04d6a273c7b1dd8bba144cd45b71e87109cfa11dd7ed561".hexToByteArray()
+    private val signer = NostrSignerSync(KeyPair(privateKey))
+
+    val event =
+        CommentEvent(
+            "fecb2ecf61a1433d417a784d10bd1e8ec19a916170a53ca8fb3a15fc666a6592",
+            "f8ff11c7a7d3478355d3b4d174e5a473797a906ea4aa61aa9b6bc0652c1ea17a",
+            1747753115,
+            arrayOf(
+                arrayOf("alt", "Reply to geo:drt3n"),
+                arrayOf("I", "geo:drt3n"),
+                arrayOf("I", "geo:drt3"),
+                arrayOf("I", "geo:drt"),
+                arrayOf("I", "geo:dr"),
+                arrayOf("I", "geo:d"),
+                arrayOf("K", "geo"),
+                arrayOf("i", "geo:drt3n"),
+                arrayOf("i", "geo:drt3"),
+                arrayOf("i", "geo:drt"),
+                arrayOf("i", "geo:dr"),
+                arrayOf("i", "geo:d"),
+                arrayOf("k", "geo"),
+            ),
+            "testing",
+            "12070e663272f1227c639fb834eb2122fc7bb995f4c49e55ebb1dfe2135ef7347d44810bacd2e64fd26b8826fd47d2800ce6c3d3b579bb3afe39088ffd4faa60",
+        )
+
+    @Test
+    fun verifyEvent() {
+        assertTrue(event.verify())
+    }
+
+    @Test
+    fun testScopes() {
+        assertEquals("drt3n", event.geohashedScope())
+        assertTrue(event.isTaggedScope("drt3n", GeohashId::match))
+        assertTrue(event.isTaggedScope(GeohashId.toScope("drt3n")))
+        assertFalse(event.isTaggedScope("drt3n"))
+    }
+
+    @Test
+    fun testCreation() {
+        val event =
+            signer.sign(
+                CommentEvent.replyExternalIdentity(
+                    "Message",
+                    GeohashId("drt3n"),
+                ),
+            )
+
+        assertEquals("drt3n", event!!.geohashedScope())
+        assertTrue(event.isTaggedScope(GeohashId.toScope("drt3n")))
+        assertFalse(event.isTaggedScope("drt3n"))
+
+        assertTrue(event.hasScopeKind(GeohashId.KIND))
+        assertTrue(event.hasRootScopeKind(GeohashId.KIND))
+        assertTrue(event.hasReplyScopeKind(GeohashId.KIND))
+    }
+}

quartz/src/main/java/com/vitorpamplona/quartz/nip01Core/tags/geohash/EventExt.kt

@@ -22,38 +22,21 @@ package com.vitorpamplona.quartz.nip01Core.tags.geohash
 
 import com.vitorpamplona.quartz.nip01Core.core.Event
 import com.vitorpamplona.quartz.nip22Comments.CommentEvent
+import com.vitorpamplona.quartz.nip73ExternalIds.location.geohashedScope
 
-fun Event.hasGeohashes() =
-    if (this is CommentEvent) {
-        this.hasGeohashes()
-    } else {
-        tags.hasGeohashes()
-    }
+fun Event.hasGeohashes() = tags.hasGeohashes()
 
-fun Event.isTaggedGeoHashes(hashtags: Set<String>) =
-    if (this is CommentEvent) {
-        this.isTaggedGeoHashes(hashtags)
-    } else {
-        tags.isTaggedGeoHashes(hashtags)
-    }
+fun Event.isTaggedGeoHashes(hashtags: Set<String>) = tags.isTaggedGeoHashes(hashtags)
 
-fun Event.isTaggedGeoHash(hashtag: String) =
-    if (this is CommentEvent) {
-        this.isTaggedGeoHash(hashtag)
-    } else {
-        tags.isTaggedGeoHash(hashtag)
-    }
+fun Event.isTaggedGeoHash(hashtag: String) = tags.isTaggedGeoHash(hashtag)
 
-fun Event.geohashes() =
-    if (this is CommentEvent) {
-        geohashes()
-    } else {
-        tags.geohashes()
-    }
+fun Event.geohashes() = tags.geohashes()
 
-fun Event.getGeoHash(): String? =
+fun Event.getGeoHash(): String? = tags.getGeoHash()
+
+fun Event.geoHashOrScope() =
     if (this is CommentEvent) {
-        getGeoHash()
+        geohashedScope()
     } else {
         tags.getGeoHash()
     }

quartz/src/main/java/com/vitorpamplona/quartz/nip01Core/tags/hashtags/EventExt.kt

@@ -21,9 +21,6 @@
 package com.vitorpamplona.quartz.nip01Core.tags.hashtags
 
 import com.vitorpamplona.quartz.nip01Core.core.Event
-import com.vitorpamplona.quartz.nip01Core.core.HexKey
-
-fun Event.forEachHashTag(onEach: (eventId: HexKey) -> Unit) = tags.forEachHashTag(onEach)
 
 fun Event.anyHashTag(onEach: (str: String) -> Boolean) = tags.anyHashTag(onEach)
 

quartz/src/main/java/com/vitorpamplona/quartz/nip01Core/tags/kinds/KindTag.kt

@@ -20,6 +20,7 @@
  */
 package com.vitorpamplona.quartz.nip01Core.tags.kinds
 
+import com.vitorpamplona.quartz.nip01Core.core.Tag
 import com.vitorpamplona.quartz.nip01Core.core.has
 import com.vitorpamplona.quartz.utils.ensure
 
@@ -27,7 +28,7 @@ class KindTag {
     companion object {
         const val TAG_NAME = "k"
 
-        fun match(tag: Array<String>) = tag.has(1) && tag[0] == TAG_NAME
+        fun match(tag: Tag) = tag.has(1) && tag[0] == TAG_NAME
 
         fun isTagged(
             tag: Array<String>,

quartz/src/main/java/com/vitorpamplona/quartz/nip22Comments/CommentEvent.kt

@@ -90,19 +90,29 @@ class CommentEvent(
 
     fun directKinds() = tags.filter(ReplyKindTag::match)
 
-    fun isGeohashTag(tag: Array<String>) = tag.size > 1 && (tag[0] == "i" || tag[0] == "I") && tag[1].startsWith("geo:")
+    /** root and reply scope search */
+    fun isTaggedScope(scopeId: String) = tags.any { RootIdentifierTag.isTagged(it, scopeId) || ReplyIdentifierTag.isTagged(it, scopeId) }
 
-    private fun getGeoHashList() = tags.filter { isGeohashTag(it) }
+    fun isTaggedScopes(scopeIds: Set<String>) = tags.any { RootIdentifierTag.isTagged(it, scopeIds) || ReplyIdentifierTag.isTagged(it, scopeIds) }
 
-    fun hasGeohashes() = tags.any { isGeohashTag(it) }
+    fun isTaggedScope(
+        value: String,
+        match: (String, String) -> Boolean,
+    ) = tags.any { RootIdentifierTag.isTagged(it, value, match) || ReplyIdentifierTag.isTagged(it, value, match) }
 
-    fun geohashes() = getGeoHashList().map { it[1].drop(4).lowercase() }
+    fun firstTaggedScopeIn(scopeIds: Set<String>) = tags.firstNotNullOfOrNull { RootIdentifierTag.matchOrNull(it, scopeIds) ?: ReplyIdentifierTag.matchOrNull(it, scopeIds) }
 
-    fun getGeoHash(): String? = geohashes().maxByOrNull { it.length }
+    fun isScoped(scopeTest: (String) -> Boolean) = tags.any { RootIdentifierTag.isTagged(it, scopeTest) || ReplyIdentifierTag.isTagged(it, scopeTest) }
 
-    fun isTaggedGeoHash(hashtag: String) = tags.any { isGeohashTag(it) && it[1].endsWith(hashtag, true) }
+    fun hasRootScopeKind(kind: String) = tags.any { RootKindTag.isKind(it, kind) }
 
-    fun isTaggedGeoHashes(hashtags: Set<String>) = geohashes().any { it in hashtags }
+    fun hasReplyScopeKind(kind: String) = tags.any { ReplyKindTag.isKind(it, kind) }
+
+    fun hasScopeKind(kind: String) = tags.any { RootKindTag.isKind(it, kind) || ReplyKindTag.isKind(it, kind) }
+
+    fun scopeValues(parser: (String) -> String?) = tags.mapNotNull { RootIdentifierTag.parse(it)?.let { parser(it) } }
+
+    fun firstScopeValue(parser: (String) -> String?) = tags.firstNotNullOfOrNull { RootIdentifierTag.parse(it)?.let { parser(it) } }
 
     override fun markedReplyTos(): List<HexKey> =
         tags.mapNotNull(ReplyEventTag::parseKey) +

quartz/src/main/java/com/vitorpamplona/quartz/nip22Comments/TagArrayBuilderExt.kt

@@ -78,7 +78,7 @@ fun TagArrayBuilder<CommentEvent>.replyKind(kind: String) = addUnique(ReplyKindT
 
 fun TagArrayBuilder<CommentEvent>.replyKind(kind: Int) = addUnique(ReplyKindTag.assemble(kind))
 
-fun TagArrayBuilder<CommentEvent>.replyKind(id: ExternalId) = addUnique(RootKindTag.assemble(id))
+fun TagArrayBuilder<CommentEvent>.replyKind(id: ExternalId) = addUnique(ReplyKindTag.assemble(id))
 
 fun TagArrayBuilder<CommentEvent>.replyAuthor(
     pubKey: HexKey,

quartz/src/main/java/com/vitorpamplona/quartz/nip22Comments/tags/ReplyIdentifierTag.kt

@@ -25,7 +25,7 @@ import com.vitorpamplona.quartz.nip01Core.core.Tag
 import com.vitorpamplona.quartz.nip01Core.core.has
 import com.vitorpamplona.quartz.nip01Core.tags.geohash.GeoHashTag
 import com.vitorpamplona.quartz.nip73ExternalIds.ExternalId
-import com.vitorpamplona.quartz.nip73ExternalIds.GeohashId
+import com.vitorpamplona.quartz.nip73ExternalIds.location.GeohashId
 import com.vitorpamplona.quartz.utils.arrayOfNotNull
 import com.vitorpamplona.quartz.utils.ensure
 
@@ -37,6 +37,43 @@ class ReplyIdentifierTag {
         @JvmStatic
         fun match(tag: Tag) = tag.has(1) && tag[0] == TAG_NAME && tag[1].isNotEmpty()
 
+        @JvmStatic
+        fun isTagged(
+            tag: Array<String>,
+            encodedScope: String,
+        ) = tag.has(1) && tag[0] == TAG_NAME && tag[1] == encodedScope
+
+        fun isTagged(
+            tag: Array<String>,
+            encodedScope: Set<String>,
+        ) = tag.has(1) && tag[0] == TAG_NAME && tag[1] in encodedScope
+
+        fun matchOrNull(
+            tag: Array<String>,
+            encodedScope: Set<String>,
+        ) = if (tag.has(1) && tag[0] == RootIdentifierTag.Companion.TAG_NAME && tag[1] in encodedScope) {
+            tag[1]
+        } else {
+            null
+        }
+
+        fun isTagged(
+            tag: Array<String>,
+            test: (String) -> Boolean,
+        ) = tag.has(1) && tag[0] == TAG_NAME && test(tag[1])
+
+        fun isTagged(
+            tag: Array<String>,
+            value: String,
+            match: (String, String) -> Boolean,
+        ) = tag.has(1) && tag[0] == TAG_NAME && match(tag[1], value)
+
+        fun isTagged(
+            tag: Array<String>,
+            value: Set<String>,
+            match: (String, Set<String>) -> Boolean,
+        ) = tag.has(1) && tag[0] == TAG_NAME && match(tag[1], value)
+
         @JvmStatic
         fun parse(tag: Tag): String? {
             ensure(tag.has(1)) { return null }
@@ -54,7 +91,7 @@ class ReplyIdentifierTag {
         @JvmStatic
         fun assemble(id: ExternalId): List<Array<String>> =
             when (id) {
-                is GeohashId -> GeoHashTag.geoMipMap(id.geohash).map { assemble(it, id.hint) }
+                is GeohashId -> GeoHashTag.geoMipMap(id.geohash).map { assemble(GeohashId.toScope(it), id.hint) }
                 else -> listOf(assemble(id.toScope(), id.hint()))
             }
     }

quartz/src/main/java/com/vitorpamplona/quartz/nip22Comments/tags/ReplyKindTag.kt

@@ -32,6 +32,12 @@ class ReplyKindTag {
         @JvmStatic
         fun match(tag: Tag) = tag.has(1) && tag[0] == TAG_NAME && tag[1].isNotEmpty()
 
+        @JvmStatic
+        fun isKind(
+            tag: Tag,
+            kind: String,
+        ) = tag.has(1) && tag[0] == TAG_NAME && tag[1] == kind
+
         @JvmStatic
         fun isTagged(
             tag: Tag,
@@ -59,7 +65,7 @@ class ReplyKindTag {
         fun assemble(kind: Int) = arrayOf(TAG_NAME, kind.toString())
 
         @JvmStatic
-        fun assemble(id: ExternalId) = RootKindTag.assemble(id.toKind())
+        fun assemble(id: ExternalId) = assemble(id.toKind())
 
         @JvmStatic
         fun assemble(kinds: List<String>): List<Tag> = kinds.map { assemble(it) }

quartz/src/main/java/com/vitorpamplona/quartz/nip22Comments/tags/RootIdentifierTag.kt

@@ -25,18 +25,54 @@ import com.vitorpamplona.quartz.nip01Core.core.Tag
 import com.vitorpamplona.quartz.nip01Core.core.has
 import com.vitorpamplona.quartz.nip01Core.tags.geohash.GeoHashTag
 import com.vitorpamplona.quartz.nip73ExternalIds.ExternalId
-import com.vitorpamplona.quartz.nip73ExternalIds.GeohashId
+import com.vitorpamplona.quartz.nip73ExternalIds.location.GeohashId
 import com.vitorpamplona.quartz.utils.arrayOfNotNull
 import com.vitorpamplona.quartz.utils.ensure
 
 @Immutable
-class RootIdentifierTag {
+class RootIdentifierTag<T : ExternalId> {
     companion object {
         const val TAG_NAME = "I"
 
         @JvmStatic
         fun match(tag: Tag) = tag.has(1) && tag[0] == TAG_NAME && tag[1].isNotEmpty()
 
+        fun isTagged(
+            tag: Array<String>,
+            encodedScope: String,
+        ) = tag.has(1) && tag[0] == TAG_NAME && tag[1] == encodedScope
+
+        fun isTagged(
+            tag: Array<String>,
+            encodedScope: Set<String>,
+        ) = tag.has(1) && tag[0] == TAG_NAME && tag[1] in encodedScope
+
+        fun matchOrNull(
+            tag: Array<String>,
+            encodedScope: Set<String>,
+        ) = if (tag.has(1) && tag[0] == TAG_NAME && tag[1] in encodedScope) {
+            tag[1]
+        } else {
+            null
+        }
+
+        fun isTagged(
+            tag: Array<String>,
+            test: (String) -> Boolean,
+        ) = tag.has(1) && tag[0] == TAG_NAME && test(tag[1])
+
+        fun isTagged(
+            tag: Array<String>,
+            value: String,
+            match: (String, String) -> Boolean,
+        ) = tag.has(1) && tag[0] == TAG_NAME && match(tag[1], value)
+
+        fun isTagged(
+            tag: Array<String>,
+            value: Set<String>,
+            match: (String, Set<String>) -> Boolean,
+        ) = tag.has(1) && tag[0] == TAG_NAME && match(tag[1], value)
+
         @JvmStatic
         fun parse(tag: Tag): String? {
             ensure(tag.has(1)) { return null }

quartz/src/main/java/com/vitorpamplona/quartz/nip22Comments/tags/RootKindTag.kt

@@ -32,6 +32,12 @@ class RootKindTag {
         @JvmStatic
         fun match(tag: Tag) = tag.has(1) && tag[0] == TAG_NAME && tag[1].isNotEmpty()
 
+        @JvmStatic
+        fun isKind(
+            tag: Tag,
+            kind: String,
+        ) = tag.has(1) && tag[0] == TAG_NAME && tag[1] == kind
+
         @JvmStatic
         fun parse(tag: Tag): String? {
             ensure(tag.has(1)) { return null }

quartz/src/main/java/com/vitorpamplona/quartz/nip70ProtectedEvts/tags/ProtectedTag.kt

@@ -20,6 +20,7 @@
  */
 package com.vitorpamplona.quartz.nip70ProtectedEvts.tags
 
+import com.vitorpamplona.quartz.nip01Core.core.Tag
 import com.vitorpamplona.quartz.nip01Core.core.has
 import com.vitorpamplona.quartz.utils.ensure
 
@@ -28,14 +29,14 @@ class ProtectedTag {
         const val TAG_NAME = "-"
 
         @JvmStatic
-        fun match(tag: Array<String>): Boolean {
+        fun match(tag: Tag): Boolean {
             ensure(tag.has(0)) { return false }
             ensure(tag[0] == TAG_NAME) { return false }
             return true
         }
 
         @JvmStatic
-        fun parse(tag: Array<String>): Boolean? {
+        fun parse(tag: Tag): Boolean? {
             ensure(tag.has(0)) { return null }
             ensure(tag[0] == TAG_NAME) { return null }
             return true

quartz/src/main/java/com/vitorpamplona/quartz/nip73ExternalIds/books/BookId.kt

@@ -18,7 +18,10 @@
  * 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.quartz.nip73ExternalIds
+package com.vitorpamplona.quartz.nip73ExternalIds.books
+
+import com.vitorpamplona.quartz.nip73ExternalIds.ExternalId
+import com.vitorpamplona.quartz.utils.ensure
 
 class BookId(
     val isbn: String,
@@ -31,9 +34,25 @@ class BookId(
     override fun hint() = hint
 
     companion object {
-        // "isbn:9780765382030"
-        fun toScope(isbn: String) = "isbn:" + isbn.lowercase().replace("-", "")
+        const val KIND = "isbn"
+        const val PREFIX_COLON = "isbn:"
 
-        fun toKind(isbn: String) = "isbn"
+        // "isbn:9780765382030"
+        fun toScope(isbn: String) = PREFIX_COLON + isbn.lowercase().replace("-", "")
+
+        fun toKind(isbn: String) = KIND
+
+        fun match(
+            encoded: String,
+            value: String,
+        ): Boolean {
+            ensure(encoded.startsWith(PREFIX_COLON)) { return false }
+            return encoded.indexOf(value, PREFIX_COLON.length) > 0
+        }
+
+        fun parse(encoded: String): String? {
+            ensure(encoded.startsWith(PREFIX_COLON)) { return null }
+            return encoded.substring(PREFIX_COLON.length)
+        }
     }
 }

quartz/src/main/java/com/vitorpamplona/quartz/nip73ExternalIds/books/CommentEventExt.kt

@@ -18,21 +18,12 @@
  * 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.quartz.nip73ExternalIds
+package com.vitorpamplona.quartz.nip73ExternalIds.books
 
-class GeohashId(
-    val geohash: String,
-    val hint: String? = null,
-) : ExternalId {
-    override fun toScope() = toScope(geohash)
+import com.vitorpamplona.quartz.nip22Comments.CommentEvent
 
-    override fun toKind() = toKind(geohash)
+fun CommentEvent.isBookScoped() = hasScopeKind(BookId.KIND)
 
-    override fun hint() = hint
+fun CommentEvent.bookScope() = firstScopeValue(BookId::parse)
 
-    companion object {
-        fun toScope(geohash: String) = "geo:" + geohash.lowercase()
-
-        fun toKind(geohash: String) = "geo"
-    }
-}
+fun CommentEvent.bookScopes() = scopeValues(BookId::parse)

quartz/src/main/java/com/vitorpamplona/quartz/nip73ExternalIds/location/CommentEventExt.kt

@@ -0,0 +1,27 @@
+/**
+ * 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.quartz.nip73ExternalIds.location
+
+import com.vitorpamplona.quartz.nip22Comments.CommentEvent
+
+fun CommentEvent.isGeohashedScoped() = hasScopeKind(GeohashId.KIND)
+
+fun CommentEvent.geohashedScope() = scopeValues(GeohashId::parse).maxByOrNull { it.length }

quartz/src/main/java/com/vitorpamplona/quartz/nip73ExternalIds/location/GeohashId.kt

@@ -18,24 +18,40 @@
  * 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.quartz.nip73ExternalIds
+package com.vitorpamplona.quartz.nip73ExternalIds.location
 
-import kotlin.math.min
+import com.vitorpamplona.quartz.nip73ExternalIds.ExternalId
+import com.vitorpamplona.quartz.utils.ensure
 
-class MovieId(
-    val isan: String,
+class GeohashId(
+    val geohash: String,
     val hint: String? = null,
 ) : ExternalId {
-    override fun toScope() = toScope(isan)
+    override fun toScope() = toScope(geohash)
 
-    override fun toKind() = toKind(isan)
+    override fun toKind() = toKind(geohash)
 
     override fun hint() = hint
 
     companion object {
-        // "isan:0000-0000-401A-0000-7"
-        fun toScope(isan: String) = "isan:" + isan.lowercase().substring(0, min(21, isan.length))
+        const val KIND = "geo"
+        const val PREFIX_COLON = "geo:"
 
-        fun toKind(isan: String) = "isan"
+        fun toScope(geohash: String) = PREFIX_COLON + geohash.lowercase()
+
+        fun toKind(geohash: String) = KIND
+
+        fun match(
+            encoded: String,
+            value: String,
+        ): Boolean {
+            ensure(encoded.startsWith(PREFIX_COLON)) { return false }
+            return encoded.indexOf(value, PREFIX_COLON.length) > 0
+        }
+
+        fun parse(encoded: String): String? {
+            ensure(encoded.startsWith(PREFIX_COLON)) { return null }
+            return encoded.substring(PREFIX_COLON.length)
+        }
     }
 }

quartz/src/main/java/com/vitorpamplona/quartz/nip73ExternalIds/movies/CommentEventExt.kt

@@ -18,22 +18,12 @@
  * 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.quartz.nip73ExternalIds
+package com.vitorpamplona.quartz.nip73ExternalIds.movies
 
-class PaperId(
-    val doi: String,
-    val hint: String? = null,
-) : ExternalId {
-    override fun toScope() = toScope(doi)
+import com.vitorpamplona.quartz.nip22Comments.CommentEvent
 
-    override fun toKind() = toKind(doi)
+fun CommentEvent.isMovieScoped() = hasScopeKind(MovieId.KIND)
 
-    override fun hint() = hint
+fun CommentEvent.movieScope() = firstScopeValue(MovieId::parse)
 
-    companion object {
-        // "doi:10.1000/182"
-        fun toScope(doi: String) = "doi:" + doi.lowercase()
-
-        fun toKind(doi: String) = "doi"
-    }
-}
+fun CommentEvent.movieScopes() = scopeValues(MovieId::parse)

quartz/src/main/java/com/vitorpamplona/quartz/nip73ExternalIds/movies/MovieId.kt

@@ -0,0 +1,84 @@
+/**
+ * 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.quartz.nip73ExternalIds.movies
+
+import com.vitorpamplona.quartz.nip73ExternalIds.ExternalId
+import com.vitorpamplona.quartz.utils.ensure
+import kotlin.math.min
+
+/**
+ * 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.
+ */
+class MovieId(
+    val isan: String,
+    val hint: String? = null,
+) : ExternalId {
+    override fun toScope() = toScope(isan)
+
+    override fun toKind() = toKind(isan)
+
+    override fun hint() = hint
+
+    companion object {
+        const val KIND = "isan"
+        const val PREFIX_COLON = "isan:"
+
+        // "isan:0000-0000-401A-0000-7"
+        fun toScope(isan: String) =
+            PREFIX_COLON +
+                isan.lowercase().substring(
+                    0,
+                    min(21, isan.length),
+                )
+
+        fun toKind(isan: String) = KIND
+
+        fun match(
+            encoded: String,
+            value: String,
+        ): Boolean {
+            ensure(encoded.startsWith(PREFIX_COLON)) { return false }
+            return encoded.indexOf(value, PREFIX_COLON.length) > 0
+        }
+
+        fun parse(encoded: String): String? {
+            ensure(encoded.startsWith(PREFIX_COLON)) { return null }
+            return encoded.substring(PREFIX_COLON.length)
+        }
+    }
+}

quartz/src/main/java/com/vitorpamplona/quartz/nip73ExternalIds/papers/CommentEventExt.kt

@@ -18,22 +18,12 @@
  * 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.quartz.nip73ExternalIds
+package com.vitorpamplona.quartz.nip73ExternalIds.papers
 
-class PodcastFeedId(
-    val guid: String,
-    val hint: String? = null,
-) : ExternalId {
-    override fun toScope() = toScope(guid)
+import com.vitorpamplona.quartz.nip22Comments.CommentEvent
 
-    override fun toKind() = toKind(guid)
+fun CommentEvent.isPaperScoped() = hasScopeKind(PaperId.KIND)
 
-    override fun hint() = hint
+fun CommentEvent.paperScope() = firstScopeValue(PaperId::parse)
 
-    companion object {
-        // "isbn:9780765382030"
-        fun toScope(guid: String) = "podcast:guid:" + guid
-
-        fun toKind(guid: String) = "podcast:guid"
-    }
-}
+fun CommentEvent.paperScopes() = scopeValues(PaperId::parse)

quartz/src/main/java/com/vitorpamplona/quartz/nip73ExternalIds/papers/PaperId.kt

@@ -0,0 +1,58 @@
+/**
+ * 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.quartz.nip73ExternalIds.papers
+
+import com.vitorpamplona.quartz.nip73ExternalIds.ExternalId
+import com.vitorpamplona.quartz.utils.ensure
+
+class PaperId(
+    val doi: String,
+    val hint: String? = null,
+) : ExternalId {
+    override fun toScope() = toScope(doi)
+
+    override fun toKind() = toKind(doi)
+
+    override fun hint() = hint
+
+    companion object {
+        const val KIND = "doi"
+        const val PREFIX_COLON = "doi:"
+
+        // "doi:10.1000/182"
+        fun toScope(doi: String) = PREFIX_COLON + doi.lowercase()
+
+        fun toKind(doi: String) = KIND
+
+        fun match(
+            encoded: String,
+            value: String,
+        ): Boolean {
+            ensure(encoded.startsWith(PREFIX_COLON)) { return false }
+            return encoded.indexOf(value, PREFIX_COLON.length) > 0
+        }
+
+        fun parse(encoded: String): String? {
+            ensure(encoded.startsWith(PREFIX_COLON)) { return null }
+            return encoded.substring(PREFIX_COLON.length)
+        }
+    }
+}

quartz/src/main/java/com/vitorpamplona/quartz/nip73ExternalIds/podcasts/CommentEventExt.kt

@@ -0,0 +1,41 @@
+/**
+ * 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.quartz.nip73ExternalIds.podcasts
+
+import com.vitorpamplona.quartz.nip22Comments.CommentEvent
+
+fun CommentEvent.isPodcastEpisodeScoped() = hasScopeKind(PodcastEpisodeId.KIND)
+
+fun CommentEvent.podcastEpisodeScope() = firstScopeValue(PodcastEpisodeId::parse)
+
+fun CommentEvent.podcastEpisodeScopes() = scopeValues(PodcastEpisodeId::parse)
+
+fun CommentEvent.isPodcastFeedScoped() = hasScopeKind(PodcastFeedId.KIND)
+
+fun CommentEvent.podcastFeedScope() = firstScopeValue(PodcastFeedId::parse)
+
+fun CommentEvent.podcastFeedScopes() = scopeValues(PodcastFeedId::parse)
+
+fun CommentEvent.isPodcastPublisherScoped() = hasScopeKind(PodcastPublisherId.KIND)
+
+fun CommentEvent.podcastPublisherScope() = firstScopeValue(PodcastPublisherId::parse)
+
+fun CommentEvent.podcastPublisherScopes() = scopeValues(PodcastPublisherId::parse)

quartz/src/main/java/com/vitorpamplona/quartz/nip73ExternalIds/podcasts/PodcastEpisodeId.kt

@@ -18,7 +18,10 @@
  * 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.quartz.nip73ExternalIds
+package com.vitorpamplona.quartz.nip73ExternalIds.podcasts
+
+import com.vitorpamplona.quartz.nip73ExternalIds.ExternalId
+import com.vitorpamplona.quartz.utils.ensure
 
 class PodcastEpisodeId(
     val guid: String,
@@ -31,9 +34,24 @@ class PodcastEpisodeId(
     override fun hint() = hint
 
     companion object {
-        // "isbn:9780765382030"
-        fun toScope(guid: String) = "podcast:item:guid:" + guid
+        const val KIND = "podcast:item:guid:guid"
+        const val PREFIX_COLON = "podcast:item:guid:"
 
-        fun toKind(guid: String) = "podcast:item:guid"
+        fun toScope(guid: String) = PREFIX_COLON + guid
+
+        fun toKind(guid: String) = KIND
+
+        fun match(
+            encoded: String,
+            value: String,
+        ): Boolean {
+            ensure(encoded.startsWith(PREFIX_COLON)) { return false }
+            return encoded.indexOf(value, PREFIX_COLON.length) > 0
+        }
+
+        fun parse(encoded: String): String? {
+            ensure(encoded.startsWith(PREFIX_COLON)) { return null }
+            return encoded.substring(PREFIX_COLON.length)
+        }
     }
 }

quartz/src/main/java/com/vitorpamplona/quartz/nip73ExternalIds/podcasts/PodcastFeedId.kt

@@ -0,0 +1,58 @@
+/**
+ * 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.quartz.nip73ExternalIds.podcasts
+
+import com.vitorpamplona.quartz.nip73ExternalIds.ExternalId
+import com.vitorpamplona.quartz.utils.ensure
+
+class PodcastFeedId(
+    val guid: String,
+    val hint: String? = null,
+) : ExternalId {
+    override fun toScope() = toScope(guid)
+
+    override fun toKind() = toKind(guid)
+
+    override fun hint() = hint
+
+    companion object {
+        const val KIND = "podcast:guid"
+        const val PREFIX_COLON = "podcast:guid:"
+
+        // "isbn:9780765382030"
+        fun toScope(guid: String) = PREFIX_COLON + guid
+
+        fun toKind(guid: String) = KIND
+
+        fun match(
+            encoded: String,
+            value: String,
+        ): Boolean {
+            ensure(encoded.startsWith(PREFIX_COLON)) { return false }
+            return encoded.indexOf(value, PREFIX_COLON.length) > 0
+        }
+
+        fun parse(encoded: String): String? {
+            ensure(encoded.startsWith(PREFIX_COLON)) { return null }
+            return encoded.substring(PREFIX_COLON.length)
+        }
+    }
+}

quartz/src/main/java/com/vitorpamplona/quartz/nip73ExternalIds/podcasts/PodcastPublisherId.kt

@@ -18,7 +18,10 @@
  * 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.quartz.nip73ExternalIds
+package com.vitorpamplona.quartz.nip73ExternalIds.podcasts
+
+import com.vitorpamplona.quartz.nip73ExternalIds.ExternalId
+import com.vitorpamplona.quartz.utils.ensure
 
 class PodcastPublisherId(
     val guid: String,
@@ -31,9 +34,25 @@ class PodcastPublisherId(
     override fun hint() = hint
 
     companion object {
-        // "isbn:9780765382030"
-        fun toScope(guid: String) = "podcast:publisher:guid:" + guid
+        const val KIND = "podcast:publisher:guid"
+        const val PREFIX_COLON = "podcast:publisher:guid:"
 
-        fun toKind(guid: String) = "podcast:publisher:guid"
+        // "isbn:9780765382030"
+        fun toScope(guid: String) = PREFIX_COLON + guid
+
+        fun toKind(guid: String) = KIND
+
+        fun match(
+            encoded: String,
+            value: String,
+        ): Boolean {
+            ensure(encoded.startsWith(PREFIX_COLON)) { return false }
+            return encoded.indexOf(value, PREFIX_COLON.length) > 0
+        }
+
+        fun parse(encoded: String): String? {
+            ensure(encoded.startsWith(PREFIX_COLON)) { return null }
+            return encoded.substring(PREFIX_COLON.length)
+        }
     }
 }

quartz/src/main/java/com/vitorpamplona/quartz/nip73ExternalIds/topics/CommentEventExt.kt

@@ -18,21 +18,12 @@
  * 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.quartz.nip73ExternalIds
+package com.vitorpamplona.quartz.nip73ExternalIds.topics
 
-class HashtagId(
-    val topic: String,
-    val hint: String? = null,
-) : ExternalId {
-    override fun toScope() = toScope(topic)
+import com.vitorpamplona.quartz.nip22Comments.CommentEvent
 
-    override fun toKind() = toKind(topic)
+fun CommentEvent.isHashtagScoped() = hasScopeKind(HashtagId.KIND)
 
-    override fun hint() = hint
+fun CommentEvent.hashtagScope() = firstScopeValue(HashtagId::parse)
 
-    companion object {
-        fun toScope(topic: String) = "#" + topic.lowercase()
-
-        fun toKind(topic: String) = "#"
-    }
-}
+fun CommentEvent.hashtagScopes() = scopeValues(HashtagId::parse)

quartz/src/main/java/com/vitorpamplona/quartz/nip73ExternalIds/topics/HashtagId.kt

@@ -0,0 +1,81 @@
+/**
+ * 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.quartz.nip73ExternalIds.topics
+
+import com.vitorpamplona.quartz.nip73ExternalIds.ExternalId
+import com.vitorpamplona.quartz.utils.ensure
+
+/**
+ * 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.
+ */
+class HashtagId(
+    val topic: String,
+    val hint: String? = null,
+) : ExternalId {
+    override fun toScope() = toScope(topic)
+
+    override fun toKind() = toKind(topic)
+
+    override fun hint() = hint
+
+    companion object {
+        const val KIND = "#"
+        const val KIND_CHR = '#'
+
+        fun toScope(topic: String) = KIND + topic.lowercase()
+
+        fun toKind(topic: String) = KIND
+
+        fun match(
+            encoded: String,
+            value: String,
+        ): Boolean {
+            ensure(encoded.length > 1) { return false }
+            ensure(encoded[0] == KIND_CHR) { return false }
+            return encoded.indexOf(value, 1) > 0
+        }
+
+        fun parse(encoded: String): String? {
+            return if (encoded.length > 1 && encoded[0] == KIND_CHR) {
+                encoded.substring(1)
+            } else {
+                null
+            }
+        }
+    }
+}

quartz/src/main/java/com/vitorpamplona/quartz/nip73ExternalIds/urls/CommentEventExt.kt

@@ -0,0 +1,29 @@
+/**
+ * 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.quartz.nip73ExternalIds.urls
+
+import com.vitorpamplona.quartz.nip22Comments.CommentEvent
+
+fun CommentEvent.isUrlScoped() = hasScopeKind(UrlId.KIND)
+
+fun CommentEvent.urlScope() = firstScopeValue(UrlId::parse)
+
+fun CommentEvent.urlScopes() = scopeValues(UrlId::parse)

quartz/src/main/java/com/vitorpamplona/quartz/nip73ExternalIds/urls/UrlId.kt

@@ -18,8 +18,10 @@
  * 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.quartz.nip73ExternalIds
+package com.vitorpamplona.quartz.nip73ExternalIds.urls
 
+import com.vitorpamplona.quartz.nip73ExternalIds.ExternalId
+import com.vitorpamplona.quartz.utils.ensure
 import com.vitorpamplona.quartz.utils.toStringNoFragment
 import org.czeal.rfc3986.URIReference
 
@@ -34,8 +36,25 @@ class UrlId(
     override fun hint() = hint
 
     companion object {
+        const val KIND = "web"
+        const val PREFIX1 = "https://"
+        const val PREFIX2 = "http://"
+
         fun toScope(url: String) = URIReference.parse(url).normalize().toStringNoFragment()
 
-        fun toKind(url: String) = "web"
+        fun toKind(url: String) = KIND
+
+        fun match(
+            encoded: String,
+            value: String,
+        ): Boolean {
+            ensure(encoded.startsWith(PREFIX1) || encoded.startsWith(PREFIX2)) { return false }
+            return encoded == value
+        }
+
+        fun parse(encoded: String): String? {
+            ensure(encoded.startsWith(PREFIX1) || encoded.startsWith(PREFIX2)) { return null }
+            return encoded
+        }
     }
 }