Merge pull request #2018 from vitorpamplona/claude/implement-nip88-rendering-Ps1Ea

Implement NIP-C7 chat messages (kind 9)

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

@@ -217,6 +217,7 @@ import com.vitorpamplona.quartz.nipA4PublicMessages.PublicMessageEvent
 import com.vitorpamplona.quartz.nipB0WebBookmarks.WebBookmarkEvent
 import com.vitorpamplona.quartz.nipB7Blossom.BlossomServersEvent
 import com.vitorpamplona.quartz.nipC0CodeSnippets.CodeSnippetEvent
+import com.vitorpamplona.quartz.nipC7Chats.ChatEvent
 import com.vitorpamplona.quartz.utils.DualCase
 import com.vitorpamplona.quartz.utils.Hex
 import com.vitorpamplona.quartz.utils.Log
@@ -2156,6 +2157,12 @@ object LocalCache : ILocalCache, ICacheProvider {
         wasVerified: Boolean,
     ) = consumeRegularEvent(event, relay, wasVerified)
 
+    fun consume(
+        event: ChatEvent,
+        relay: NormalizedRelayUrl?,
+        wasVerified: Boolean,
+    ) = consumeRegularEvent(event, relay, wasVerified)
+
     fun consume(
         event: PollEvent,
         relay: NormalizedRelayUrl?,
@@ -3236,6 +3243,7 @@ object LocalCache : ILocalCache, ICacheProvider {
                 is RequestToVanishEvent -> consume(event, relay, wasVerified)
                 is CodeSnippetEvent -> consume(event, relay, wasVerified)
                 is ZapPollEvent -> consume(event, relay, wasVerified)
+                is ChatEvent -> consume(event, relay, wasVerified)
                 is PollEvent -> consume(event, relay, wasVerified)
                 is PollResponseEvent -> consume(event, relay, wasVerified)
                 is RelayDiscoveryEvent -> consume(event, relay, wasVerified)

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

@@ -116,6 +116,7 @@ import com.vitorpamplona.amethyst.ui.note.types.RenderCalendarDateSlotEvent
 import com.vitorpamplona.amethyst.ui.note.types.RenderCalendarTimeSlotEvent
 import com.vitorpamplona.amethyst.ui.note.types.RenderCashuMint
 import com.vitorpamplona.amethyst.ui.note.types.RenderChannelMessage
+import com.vitorpamplona.amethyst.ui.note.types.RenderChat
 import com.vitorpamplona.amethyst.ui.note.types.RenderChatMessage
 import com.vitorpamplona.amethyst.ui.note.types.RenderChatMessageEncryptedFile
 import com.vitorpamplona.amethyst.ui.note.types.RenderChessGame
@@ -288,6 +289,7 @@ import com.vitorpamplona.quartz.nip99Classifieds.ClassifiedsEvent
 import com.vitorpamplona.quartz.nipA0VoiceMessages.BaseVoiceEvent
 import com.vitorpamplona.quartz.nipA4PublicMessages.PublicMessageEvent
 import com.vitorpamplona.quartz.nipC0CodeSnippets.CodeSnippetEvent
+import com.vitorpamplona.quartz.nipC7Chats.ChatEvent
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.delay
 import kotlinx.coroutines.withContext
@@ -1178,6 +1180,18 @@ private fun RenderNoteRow(
             )
         }
 
+        is ChatEvent -> {
+            RenderChat(
+                baseNote,
+                makeItShort,
+                canPreview,
+                quotesLeft,
+                backgroundColor,
+                accountViewModel,
+                nav,
+            )
+        }
+
         is PollEvent -> {
             RenderPoll(
                 baseNote,

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/note/types/Chat.kt

@@ -0,0 +1,92 @@
+/*
+ * 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.note.types
+
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.MutableState
+import androidx.compose.runtime.remember
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.text.style.TextOverflow
+import com.vitorpamplona.amethyst.commons.model.EmptyTagList
+import com.vitorpamplona.amethyst.commons.model.toImmutableListOfLists
+import com.vitorpamplona.amethyst.model.Note
+import com.vitorpamplona.amethyst.ui.components.SensitivityWarning
+import com.vitorpamplona.amethyst.ui.components.TranslatableRichTextViewer
+import com.vitorpamplona.amethyst.ui.navigation.navs.INav
+import com.vitorpamplona.amethyst.ui.note.elements.DisplayUncitedHashtags
+import com.vitorpamplona.amethyst.ui.screen.loggedIn.AccountViewModel
+import com.vitorpamplona.amethyst.ui.theme.placeholderText
+import com.vitorpamplona.quartz.nip01Core.tags.hashtags.hasHashtags
+
+@Composable
+fun RenderChat(
+    note: Note,
+    makeItShort: Boolean,
+    canPreview: Boolean,
+    quotesLeft: Int,
+    backgroundColor: MutableState<Color>,
+    accountViewModel: AccountViewModel,
+    nav: INav,
+) {
+    val noteEvent = note.event ?: return
+    val eventContent = remember(noteEvent) { noteEvent.content }
+
+    if (makeItShort && accountViewModel.isLoggedUser(note.author)) {
+        Text(
+            text = eventContent,
+            color = MaterialTheme.colorScheme.placeholderText,
+            maxLines = 2,
+            overflow = TextOverflow.Ellipsis,
+        )
+    } else {
+        val callbackUri = remember(note) { note.toNostrUri() }
+
+        SensitivityWarning(
+            note = note,
+            accountViewModel = accountViewModel,
+        ) {
+            val tags =
+                remember(note) { note.event?.tags?.toImmutableListOfLists() ?: EmptyTagList }
+
+            TranslatableRichTextViewer(
+                content = eventContent,
+                canPreview = canPreview && !makeItShort,
+                quotesLeft = quotesLeft,
+                modifier = Modifier.fillMaxWidth(),
+                tags = tags,
+                backgroundColor = backgroundColor,
+                id = note.idHex,
+                callbackUri = callbackUri,
+                accountViewModel = accountViewModel,
+                nav = nav,
+            )
+        }
+
+        if (noteEvent.hasHashtags()) {
+            val callbackUri = remember(note) { note.toNostrUri() }
+            DisplayUncitedHashtags(noteEvent, eventContent, callbackUri, accountViewModel, nav)
+        }
+    }
+}

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

@@ -149,6 +149,7 @@ import com.vitorpamplona.amethyst.ui.note.types.RenderCalendarDateSlotEvent
 import com.vitorpamplona.amethyst.ui.note.types.RenderCalendarTimeSlotEvent
 import com.vitorpamplona.amethyst.ui.note.types.RenderCashuMint
 import com.vitorpamplona.amethyst.ui.note.types.RenderChannelMessage
+import com.vitorpamplona.amethyst.ui.note.types.RenderChat
 import com.vitorpamplona.amethyst.ui.note.types.RenderChatMessageEncryptedFile
 import com.vitorpamplona.amethyst.ui.note.types.RenderCodeSnippetHeaderForThread
 import com.vitorpamplona.amethyst.ui.note.types.RenderEmojiPack
@@ -162,8 +163,8 @@ import com.vitorpamplona.amethyst.ui.note.types.RenderHighlight
 import com.vitorpamplona.amethyst.ui.note.types.RenderInteractiveStory
 import com.vitorpamplona.amethyst.ui.note.types.RenderLiveActivityChatMessage
 import com.vitorpamplona.amethyst.ui.note.types.RenderLnZap
-import com.vitorpamplona.amethyst.ui.note.types.RenderNamedSiteEvent
 import com.vitorpamplona.amethyst.ui.note.types.RenderMintRecommendation
+import com.vitorpamplona.amethyst.ui.note.types.RenderNamedSiteEvent
 import com.vitorpamplona.amethyst.ui.note.types.RenderPinListEvent
 import com.vitorpamplona.amethyst.ui.note.types.RenderPoll
 import com.vitorpamplona.amethyst.ui.note.types.RenderPostApproval
@@ -286,6 +287,7 @@ import com.vitorpamplona.quartz.nip99Classifieds.ClassifiedsEvent
 import com.vitorpamplona.quartz.nipA0VoiceMessages.BaseVoiceEvent
 import com.vitorpamplona.quartz.nipA4PublicMessages.PublicMessageEvent
 import com.vitorpamplona.quartz.nipC0CodeSnippets.CodeSnippetEvent
+import com.vitorpamplona.quartz.nipC7Chats.ChatEvent
 import kotlinx.collections.immutable.toImmutableList
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.runBlocking
@@ -775,6 +777,16 @@ private fun FullBleedNoteCompose(
                     RenderFedimint(noteEvent)
                 } else if (noteEvent is MintRecommendationEvent) {
                     RenderMintRecommendation(noteEvent)
+                } else if (noteEvent is ChatEvent) {
+                    RenderChat(
+                        note = baseNote,
+                        makeItShort = false,
+                        canPreview = canPreview,
+                        quotesLeft = 3,
+                        backgroundColor = backgroundColor,
+                        accountViewModel = accountViewModel,
+                        nav = nav,
+                    )
                 } else if (noteEvent is PollEvent) {
                     RenderPoll(
                         note = baseNote,

quartz/src/commonMain/kotlin/com/vitorpamplona/quartz/nipC7Chats/ChatEvent.kt

@@ -0,0 +1,113 @@
+/*
+ * 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.nipC7Chats
+
+import androidx.compose.runtime.Immutable
+import com.vitorpamplona.quartz.nip01Core.core.HexKey
+import com.vitorpamplona.quartz.nip01Core.core.TagArrayBuilder
+import com.vitorpamplona.quartz.nip01Core.hints.EventHintBundle
+import com.vitorpamplona.quartz.nip01Core.hints.EventHintProvider
+import com.vitorpamplona.quartz.nip01Core.hints.PubKeyHintProvider
+import com.vitorpamplona.quartz.nip01Core.hints.types.EventIdHint
+import com.vitorpamplona.quartz.nip01Core.hints.types.PubKeyHint
+import com.vitorpamplona.quartz.nip01Core.signers.eventTemplate
+import com.vitorpamplona.quartz.nip01Core.tags.people.PTag
+import com.vitorpamplona.quartz.nip10Notes.BaseNoteEvent
+import com.vitorpamplona.quartz.nip18Reposts.quotes.QEventTag
+import com.vitorpamplona.quartz.nip18Reposts.quotes.QTag
+import com.vitorpamplona.quartz.nip18Reposts.quotes.quote
+import com.vitorpamplona.quartz.nip19Bech32.eventHints
+import com.vitorpamplona.quartz.nip19Bech32.eventIds
+import com.vitorpamplona.quartz.nip19Bech32.pubKeyHints
+import com.vitorpamplona.quartz.nip19Bech32.pubKeys
+import com.vitorpamplona.quartz.nip22Comments.RootScope
+import com.vitorpamplona.quartz.nip31Alts.alt
+import com.vitorpamplona.quartz.nip50Search.SearchableEvent
+import com.vitorpamplona.quartz.utils.TimeUtils
+
+@Immutable
+class ChatEvent(
+    id: HexKey,
+    pubKey: HexKey,
+    createdAt: Long,
+    tags: Array<Array<String>>,
+    content: String,
+    sig: HexKey,
+) : BaseNoteEvent(id, pubKey, createdAt, KIND, tags, content, sig),
+    RootScope,
+    EventHintProvider,
+    PubKeyHintProvider,
+    SearchableEvent {
+    override fun indexableContent() = content
+
+    fun quotedEvents() = tags.mapNotNull(QEventTag::parse)
+
+    fun replyingTo() = tags.lastOrNull { it.size > 1 && it[0] == QTag.TAG_NAME }?.get(1)
+
+    override fun eventHints(): List<EventIdHint> {
+        val qHints = tags.mapNotNull(QTag::parseEventAsHint)
+        val nip19Hints = citedNIP19().eventHints()
+        return qHints + nip19Hints
+    }
+
+    override fun linkedEventIds(): List<HexKey> {
+        val qHints = tags.mapNotNull(QTag::parseEventId)
+        val nip19Hints = citedNIP19().eventIds()
+        return qHints + nip19Hints
+    }
+
+    override fun pubKeyHints(): List<PubKeyHint> {
+        val pHints = tags.mapNotNull(PTag::parseAsHint)
+        val nip19Hints = citedNIP19().pubKeyHints()
+        return pHints + nip19Hints
+    }
+
+    override fun linkedPubKeys(): List<HexKey> {
+        val pHints = tags.mapNotNull(PTag::parseKey)
+        val nip19Hints = citedNIP19().pubKeys()
+        return pHints + nip19Hints
+    }
+
+    companion object {
+        const val KIND = 9
+        const val ALT_DESCRIPTION = "Chat message"
+
+        fun build(
+            message: String,
+            createdAt: Long = TimeUtils.now(),
+            initializer: TagArrayBuilder<ChatEvent>.() -> Unit = {},
+        ) = eventTemplate(KIND, message, createdAt) {
+            alt(ALT_DESCRIPTION)
+            initializer()
+        }
+
+        fun reply(
+            message: String,
+            replyTo: EventHintBundle<ChatEvent>,
+            createdAt: Long = TimeUtils.now(),
+            initializer: TagArrayBuilder<ChatEvent>.() -> Unit = {},
+        ) = eventTemplate(KIND, message, createdAt) {
+            alt(ALT_DESCRIPTION)
+            quote(QEventTag(replyTo.event.id, replyTo.relay, replyTo.event.pubKey))
+            initializer()
+        }
+    }
+}

quartz/src/commonMain/kotlin/com/vitorpamplona/quartz/utils/EventFactory.kt

@@ -186,6 +186,7 @@ import com.vitorpamplona.quartz.nipB0WebBookmarks.WebBookmarkEvent
 import com.vitorpamplona.quartz.nipB7Blossom.BlossomAuthorizationEvent
 import com.vitorpamplona.quartz.nipB7Blossom.BlossomServersEvent
 import com.vitorpamplona.quartz.nipC0CodeSnippets.CodeSnippetEvent
+import com.vitorpamplona.quartz.nipC7Chats.ChatEvent
 
 interface EventBuilder {
     fun build(
@@ -239,6 +240,7 @@ class EventFactory {
                 CashuTokenEvent.KIND -> CashuTokenEvent(id, pubKey, createdAt, tags, content, sig)
                 CashuSpendingHistoryEvent.KIND -> CashuSpendingHistoryEvent(id, pubKey, createdAt, tags, content, sig)
                 CashuWalletEvent.KIND -> CashuWalletEvent(id, pubKey, createdAt, tags, content, sig)
+                ChatEvent.KIND -> ChatEvent(id, pubKey, createdAt, tags, content, sig)
                 ChessGameEvent.KIND -> ChessGameEvent(id, pubKey, createdAt, tags, content, sig)
                 CodeSnippetEvent.KIND -> CodeSnippetEvent(id, pubKey, createdAt, tags, content, sig)
                 RelayFeedsListEvent.KIND -> RelayFeedsListEvent(id, pubKey, createdAt, tags, content, sig)