Switches the metadata relay for the relay being used with the most amount of posts to be the relayhint

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

@@ -506,7 +506,7 @@ object LocalCache : ILocalCache, ICacheProvider {
                         }
                     }
 
-                user.updateUserInfo(newUserMetadata, event, fallbackRelay)
+                user.updateUserInfo(newUserMetadata, event)
                 if (relay != null) {
                     user.addRelayBeingUsed(relay, event.createdAt)
                 }

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/chats/privateDM/datasource/FilterNip04DMs.kt

@@ -49,19 +49,25 @@ fun filterNip04DMs(
 
         val outbox =
             authorHomeRelayEvent?.writeRelaysNorm()
+                ?: LocalCache
+                    .getUserIfExists(it)
+                    ?.relaysBeingUsed
+                    ?.keys
+                    ?.ifEmpty { null }
                 ?: LocalCache.relayHints.hintsForKey(it).ifEmpty { null }
-                ?: listOfNotNull(
-                    LocalCache.getUserIfExists(it)?.metadataOrNull()?.relay,
-                )
+                ?: emptyList()
 
         groupOutboxRelays.addAll(outbox)
 
         val inbox =
             authorHomeRelayEvent?.readRelaysNorm()?.ifEmpty { null }
+                ?: LocalCache
+                    .getUserIfExists(it)
+                    ?.relaysBeingUsed
+                    ?.keys
+                    ?.ifEmpty { null }
                 ?: LocalCache.relayHints.hintsForKey(it).ifEmpty { null }
-                ?: listOfNotNull(
-                    LocalCache.getUserIfExists(it)?.metadataOrNull()?.relay,
-                )
+                ?: emptyList()
 
         groupInboxRelays.addAll(inbox)
     }

commons/src/commonMain/kotlin/com/vitorpamplona/amethyst/commons/model/Note.kt

@@ -230,7 +230,7 @@ open class Note(
 
             return relays.firstOrNull()
         } else {
-            currentOutbox?.firstOrNull() ?: author?.metadataOrNull()?.relay
+            currentOutbox?.firstOrNull() ?: author?.mostUsedRelay()
         }
     }
 

commons/src/commonMain/kotlin/com/vitorpamplona/amethyst/commons/model/User.kt

@@ -82,13 +82,19 @@ class User(
 
     fun outboxRelays() = authorRelayList()?.writeRelaysNorm()
 
-    fun relayHints() = authorRelayList()?.writeRelaysNorm()?.take(3) ?: listOfNotNull(metadataOrNull()?.relay)
+    fun relayHints() =
+        authorRelayList()?.writeRelaysNorm()?.take(3) ?: relaysBeingUsed.entries
+            .sortedByDescending { it.value.counter }
+            .take(3)
+            .map { it.key }
 
     fun inboxRelays() = authorRelayList()?.readRelaysNorm()
 
     fun dmInboxRelays() = dmInboxRelayList()?.relays()?.ifEmpty { null } ?: inboxRelays()
 
-    fun bestRelayHint() = authorRelayList()?.writeRelaysNorm()?.firstOrNull() ?: metadataOrNull()?.relay
+    fun bestRelayHint() = authorRelayList()?.writeRelaysNorm()?.firstOrNull() ?: mostUsedRelay()
+
+    fun mostUsedRelay() = relaysBeingUsed.maxByOrNull { it.value.counter }?.key
 
     fun toPTag() = PTag(pubkeyHex, bestRelayHint())
 
@@ -188,7 +194,6 @@ class User(
     fun updateUserInfo(
         newUserInfo: UserMetadata,
         metaEvent: MetadataEvent,
-        relay: NormalizedRelayUrl?,
     ) {
         newUserInfo.cleanBlankNames()
 
@@ -205,10 +210,6 @@ class User(
 
         metadata.newMetadata(newUserInfo, metaEvent)
 
-        if (relay != null) {
-            metadata.relay = relay
-        }
-
         // doesn't create Nip05 unless needed.
         nip05StateOrNull()?.newMetadata(newUserInfo.nip05, metaEvent.pubKey)
     }

commons/src/commonMain/kotlin/com/vitorpamplona/amethyst/commons/model/nip01Core/UserMetadataCache.kt

@@ -25,7 +25,6 @@ import com.vitorpamplona.amethyst.commons.model.ImmutableListOfLists
 import com.vitorpamplona.amethyst.commons.model.toImmutableListOfLists
 import com.vitorpamplona.quartz.nip01Core.metadata.MetadataEvent
 import com.vitorpamplona.quartz.nip01Core.metadata.UserMetadata
-import com.vitorpamplona.quartz.nip01Core.relay.normalizer.NormalizedRelayUrl
 import com.vitorpamplona.quartz.nip39ExtIdentities.IdentityClaimTag
 import com.vitorpamplona.quartz.nip39ExtIdentities.identityClaims
 import kotlinx.coroutines.flow.MutableStateFlow
@@ -42,7 +41,6 @@ class UserInfo(
 @Stable
 class UserMetadataCache {
     val flow: MutableStateFlow<UserInfo?> = MutableStateFlow(null)
-    var relay: NormalizedRelayUrl? = null
 
     fun newMetadata(
         userInfo: UserMetadata,

desktopApp/src/jvmMain/kotlin/com/vitorpamplona/amethyst/desktop/cache/DesktopLocalCache.kt

@@ -110,7 +110,7 @@ class DesktopLocalCache : ICacheProvider {
         if (user.metadata().shouldUpdateWith(event)) {
             val newUserMetadata = event.contactMetaData()
             if (newUserMetadata != null) {
-                user.updateUserInfo(newUserMetadata, event, null)
+                user.updateUserInfo(newUserMetadata, event)
             }
         }
     }