Visual support for Kind1 forks.

quartz/src/main/java/com/vitorpamplona/quartz/events/BaseTextNoteEvent.kt

@@ -22,6 +22,7 @@ package com.vitorpamplona.quartz.events
 
 import android.util.Log
 import androidx.compose.runtime.Immutable
+import com.vitorpamplona.quartz.encoders.ATag
 import com.vitorpamplona.quartz.encoders.HexKey
 import com.vitorpamplona.quartz.encoders.Nip19Bech32
 import com.vitorpamplona.quartz.encoders.Nip19Bech32.nip19regex
@@ -42,6 +43,18 @@ open class BaseTextNoteEvent(
 ) : Event(id, pubKey, createdAt, kind, tags, content, sig) {
     fun mentions() = taggedUsers()
 
+    fun isAFork() = tags.any { it.size > 3 && (it[0] == "a" || it[0] == "e") && it[3] == "fork" }
+
+    fun forkFromAddress() =
+        tags.firstOrNull { it.size > 3 && it[0] == "a" && it[3] == "fork" }?.let {
+            val aTagValue = it[1]
+            val relay = it.getOrNull(2)
+
+            ATag.parse(aTagValue, relay)
+        }
+
+    fun forkFromVersion() = tags.firstOrNull { it.size > 3 && it[0] == "e" && it[3] == "fork" }?.get(1)
+
     open fun replyTos(): List<HexKey> {
         val oldStylePositional = tags.filter { it.size > 1 && it.size <= 3 && it[0] == "e" }.map { it[1] }
         val newStyleReply = tags.lastOrNull { it.size > 3 && it[0] == "e" && it[3] == "reply" }?.get(1)

quartz/src/main/java/com/vitorpamplona/quartz/events/TextNoteEvent.kt

@@ -57,6 +57,7 @@ class TextNoteEvent(
             directMentions: Set<HexKey> = emptySet(),
             geohash: String? = null,
             nip94attachments: List<FileHeaderEvent>? = null,
+            forkedFrom: Event? = null,
             signer: NostrSigner,
             createdAt: Long = TimeUtils.now(),
             onReady: (TextNoteEvent) -> Unit,
@@ -69,6 +70,7 @@ class TextNoteEvent(
                         root = root,
                         replyingTo = replyingTo,
                         directMentions = directMentions,
+                        forkedFrom = forkedFrom?.id,
                     ),
                 )
             }
@@ -93,6 +95,7 @@ class TextNoteEvent(
                             root = root,
                             replyingTo = replyingTo,
                             directMentions = directMentions,
+                            forkedFrom = (forkedFrom as? AddressableEvent)?.address()?.toTag(),
                         ),
                     )
                 }
@@ -136,6 +139,7 @@ class TextNoteEvent(
             root: String?,
             replyingTo: String?,
             directMentions: Set<HexKey>,
+            forkedFrom: String?,
         ) = sortedWith { o1, o2 ->
             when {
                 o1 == o2 -> 0
@@ -150,6 +154,7 @@ class TextNoteEvent(
                 when (it) {
                     root -> arrayOf(tagName, it, "", "root")
                     replyingTo -> arrayOf(tagName, it, "", "reply")
+                    forkedFrom -> arrayOf(tagName, it, "", "fork")
                     in directMentions -> arrayOf(tagName, it, "", "mention")
                     else -> arrayOf(tagName, it)
                 }

quartz/src/main/java/com/vitorpamplona/quartz/events/WikiNoteEvent.kt

@@ -41,16 +41,6 @@ class WikiNoteEvent(
 
     fun topics() = hashtags()
 
-    fun forkFromAddress() =
-        tags.firstOrNull { it.size > 3 && it[0] == "a" && it[3] == "fork" }?.let {
-            val aTagValue = it[1]
-            val relay = it.getOrNull(2)
-
-            ATag.parse(aTagValue, relay)
-        }
-
-    fun forkFromVersion() = tags.firstOrNull { it.size > 3 && it[0] == "e" && it[3] == "fork" }?.get(1)
-
     fun title() = tags.firstOrNull { it.size > 1 && it[0] == "title" }?.get(1)
 
     fun summary() = tags.firstOrNull { it.size > 1 && it[0] == "summary" }?.get(1)