Properly removes a note from the database

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

@@ -585,6 +585,19 @@ object LocalCache {
       toBeRemoved.forEach {
         notes.remove(it.idHex)
         // Doesn't need to clean up the replies and mentions.. Too small to matter.
+
+        // reverts the add
+        it.mentions?.forEach { user ->
+          user.removeTaggedPost(it)
+        }
+        it.replyTo?.forEach { replyingNote ->
+          replyingNote.author?.removeTaggedPost(it)
+        }
+
+        // Counts the replies
+        it.replyTo?.forEach { replyingNote ->
+          it.removeReply(it)
+        }
       }
 
       println("PRUNE: ${toBeRemoved.size} messages removed from ${it.value.info.name}")
@@ -635,6 +648,22 @@ object LocalCache {
     }
 
     toBeRemoved.forEach {
+      // reverts the add
+      it.mentions?.forEach { user ->
+        user.removeTaggedPost(it)
+      }
+      it.replyTo?.forEach { replyingNote ->
+        replyingNote.author?.removeTaggedPost(it)
+      }
+
+      // Counts the replies
+      it.replyTo?.forEach { replyingNote ->
+        it.removeReply(it)
+        it.removeBoost(it)
+        it.removeReaction(it)
+        it.removeZap(it)
+      }
+
       notes.remove(it.idHex)
     }
 

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

@@ -104,6 +104,25 @@ class Note(val idHex: String) {
         }
     }
 
+    fun removeReply(note: Note) {
+        replies = replies - note
+    }
+    fun removeBoost(note: Note) {
+        boosts = boosts - note
+    }
+    fun removeReaction(note: Note) {
+        reactions = reactions - note
+    }
+    fun removeZap(note: Note) {
+        if (zaps[note] != null) {
+            zaps = zaps.minus(note)
+        } else if (zaps.containsValue(note)) {
+            val toRemove = zaps.filterValues { it == note }
+            zaps = zaps.minus(toRemove.keys)
+        }
+    }
+
+
     fun addBoost(note: Note) {
         if (note !in boosts) {
             boosts = boosts + note
@@ -261,7 +280,8 @@ class NoteLiveSet(u: Note) {
     val zaps: NoteLiveData = NoteLiveData(u)
 
     fun isInUse(): Boolean {
-        return reactions.hasObservers()
+        return metadata.hasObservers()
+          || reactions.hasObservers()
           || boosts.hasObservers()
           || replies.hasObservers()
           || reports.hasObservers()

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

@@ -123,6 +123,10 @@ class User(val pubkeyHex: String) {
         }
     }
 
+    fun removeTaggedPost(note: Note) {
+        taggedPosts = taggedPosts - note
+    }
+
     fun addNote(note: Note) {
         if (note !in notes) {
             notes = notes + note