Fixes the deletion of private messages and messages in tags

app/src/main/java/com/vitorpamplona/amethyst/model/Channel.kt

@@ -27,6 +27,10 @@ class Channel(val idHex: String) {
         notes[note.idHex] = note
     }
 
+    fun removeNote(note: Note) {
+        notes.remove(note.idHex)
+    }
+
     fun updateChannelInfo(creator: User, channelInfo: ChannelCreateEvent.ChannelData, updatedAt: Long) {
         this.creator = creator
         this.info = channelInfo

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

@@ -353,6 +353,19 @@ object LocalCache {
                     masterNote.removeReport(deleteNote)
                 }
 
+                val channel = deleteNote.channel()
+                channel?.removeNote(deleteNote)
+
+                if (deleteNote.event is PrivateDmEvent) {
+                    val author = deleteNote.author
+                    val recipient = (deleteNote.event as? PrivateDmEvent)?.recipientPubKey()?.let { checkGetOrCreateUser(it) }
+
+                    if (recipient != null && author != null) {
+                        author.removeMessage(recipient, deleteNote)
+                        recipient.removeMessage(author, deleteNote)
+                    }
+                }
+
                 notes.remove(deleteNote.idHex)
 
                 deletedAtLeastOne = true

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

@@ -197,6 +197,14 @@ class User(val pubkeyHex: String) {
         }
     }
 
+    fun removeMessage(user: User, msg: Note) {
+        val privateChatroom = getOrCreatePrivateChatroom(user)
+        if (msg in privateChatroom.roomMessages) {
+            privateChatroom.roomMessages = privateChatroom.roomMessages - msg
+            liveSet?.messages?.invalidateData()
+        }
+    }
+
     fun addRelayBeingUsed(relay: Relay, eventTime: Long) {
         val here = relaysBeingUsed[relay.url]
         if (here == null) {