Fixes the lack of the Comparator interface for the Deletion Index.

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

@@ -959,53 +959,53 @@ object LocalCache {
     }
 
     fun consume(event: DeletionEvent) {
-        deletionIndex.add(event)
+        if (deletionIndex.add(event)) {
+            var deletedAtLeastOne = false
 
-        var deletedAtLeastOne = false
+            event.deleteEvents()
+                .mapNotNull { getNoteIfExists(it) }
+                .forEach { deleteNote ->
+                    // must be the same author
+                    if (deleteNote.author?.pubkeyHex == event.pubKey) {
+                        // reverts the add
+                        deleteNote(deleteNote)
 
-        event.deleteEvents()
-            .mapNotNull { getNoteIfExists(it) }
-            .forEach { deleteNote ->
-                // must be the same author
-                if (deleteNote.author?.pubkeyHex == event.pubKey) {
-                    // reverts the add
-                    deleteNote(deleteNote)
+                        deletedAtLeastOne = true
+                    }
+                }
 
-                    deletedAtLeastOne = true
+            val addressList = event.deleteAddressTags()
+            val addressSet = addressList.toSet()
+
+            addressList
+                .mapNotNull { getAddressableNoteIfExists(it) }
+                .forEach { deleteNote ->
+                    // must be the same author
+                    if (deleteNote.author?.pubkeyHex == event.pubKey && (deleteNote.createdAt() ?: 0) <= event.createdAt) {
+                        // Counts the replies
+                        deleteNote(deleteNote)
+
+                        addressables.remove(deleteNote.idHex)
+
+                        deletedAtLeastOne = true
+                    }
+                }
+
+            notes.forEach { key, note ->
+                val noteEvent = note.event
+                if (noteEvent is AddressableEvent && noteEvent.addressTag() in addressSet) {
+                    if (noteEvent.pubKey() == event.pubKey && noteEvent.createdAt() <= event.createdAt) {
+                        deleteNote(note)
+                        deletedAtLeastOne = true
+                    }
                 }
             }
 
-        val addressList = event.deleteAddresses()
-        val addressSet = addressList.toSet()
-
-        addressList
-            .mapNotNull { getAddressableNoteIfExists(it.toTag()) }
-            .forEach { deleteNote ->
-                // must be the same author
-                if (deleteNote.author?.pubkeyHex == event.pubKey && (deleteNote.createdAt() ?: 0) < event.createdAt) {
-                    // Counts the replies
-                    deleteNote(deleteNote)
-
-                    addressables.remove(deleteNote.idHex)
-
-                    deletedAtLeastOne = true
-                }
+            if (deletedAtLeastOne) {
+                val note = Note(event.id)
+                note.loadEvent(event, getOrCreateUser(event.pubKey), emptyList())
+                refreshObservers(note)
             }
-
-        notes.forEach { key, note ->
-            val noteEvent = note.event
-            if (noteEvent is AddressableEvent && noteEvent.address() in addressSet) {
-                if (noteEvent.pubKey() == event.pubKey && noteEvent.createdAt() <= event.createdAt) {
-                    deleteNote(note)
-                    deletedAtLeastOne = true
-                }
-            }
-        }
-
-        if (deletedAtLeastOne) {
-            val note = Note(event.id)
-            note.loadEvent(event, getOrCreateUser(event.pubKey), emptyList())
-            refreshObservers(note)
         }
     }
 

commons/src/main/java/com/vitorpamplona/amethyst/commons/data/DeletionIndex.kt

@@ -26,30 +26,49 @@ import com.vitorpamplona.quartz.events.DeletionEvent
 import com.vitorpamplona.quartz.events.Event
 
 class DeletionIndex {
-    data class DeletionRequest(val reference: String, val publicKey: HexKey)
+    data class DeletionRequest(val reference: String, val publicKey: HexKey) : Comparable<DeletionRequest> {
+        override fun compareTo(other: DeletionRequest): Int {
+            val compared = reference.compareTo(other.reference)
+
+            return if (compared == 0) {
+                publicKey.compareTo(publicKey)
+            } else {
+                compared
+            }
+        }
+    }
 
     // stores a set of id OR atags (kind:pubkey:dtag) by pubkey with the created at of the deletion event.
     // Anything newer than the date should not be deleted.
     private val deletedReferencesBefore = LargeCache<DeletionRequest, Long>()
 
-    fun add(event: DeletionEvent) {
+    fun add(event: DeletionEvent): Boolean {
+        var atLeastOne = false
+
         event.tags.forEach {
             if (it.size > 1 && (it[0] == "a" || it[0] == "e")) {
-                add(it[1], event.pubKey, event.createdAt)
+                if (add(it[1], event.pubKey, event.createdAt)) {
+                    atLeastOne = true
+                }
             }
         }
+
+        return atLeastOne
     }
 
     private fun add(
         ref: String,
         byPubKey: HexKey,
         createdAt: Long,
-    ) {
+    ): Boolean {
         val key = DeletionRequest(ref, byPubKey)
         val previousDeletionTime = deletedReferencesBefore.get(key)
+
         if (previousDeletionTime == null || createdAt > previousDeletionTime) {
             deletedReferencesBefore.put(key, createdAt)
+            return true
         }
+        return false
     }
 
     fun hasBeenDeleted(event: Event): Boolean {

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

@@ -38,6 +38,8 @@ class DeletionEvent(
 
     fun deleteAddresses() = taggedAddresses()
 
+    fun deleteAddressTags() = tags.mapNotNull { if (it.size > 1 && it[0] == "a") it[1] else null }
+
     companion object {
         const val KIND = 5
         const val ALT = "Deletion event"

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

@@ -115,7 +115,7 @@ class DraftEvent(
             pubKey: HexKey,
             dTag: String,
         ): String {
-            return ATag(KIND, pubKey, dTag, null).toTag()
+            return ATag.assembleATag(KIND, pubKey, dTag)
         }
 
         fun create(