Fix member not having access to old messages (#831)

app/src/main/java/org/thoughtcrime/securesms/database/LokiAPIDatabase.kt

@@ -293,6 +293,11 @@ class LokiAPIDatabase(context: Context, helper: SQLCipherOpenHelper) : Database(
         val lastHash = database.insertOrUpdate(lastMessageHashValueTable2, row, query, arrayOf( snode.toString(), publicKey, namespace.toString() ))
     }
 
+    override fun clearLastMessageHashes(publicKey: String) {
+        databaseHelper.writableDatabase
+            .delete(lastMessageHashValueTable2, "${Companion.publicKey} = ?", arrayOf(publicKey))
+    }
+
     override fun clearAllLastMessageHashes() {
         val database = databaseHelper.writableDatabase
         database.delete(lastMessageHashValueTable2, null, null)
@@ -319,6 +324,11 @@ class LokiAPIDatabase(context: Context, helper: SQLCipherOpenHelper) : Database(
         database.insertOrUpdate(receivedMessageHashValuesTable, row, query, arrayOf( publicKey, namespace.toString() ))
     }
 
+    override fun clearReceivedMessageHashValues(publicKey: String) {
+        databaseHelper.writableDatabase
+            .delete(receivedMessageHashValuesTable, "${Companion.publicKey} = ?", arrayOf(publicKey))
+    }
+
     override fun clearReceivedMessageHashValues() {
         val database = databaseHelper.writableDatabase
         database.delete(receivedMessageHashValuesTable, null, null)

app/src/main/java/org/thoughtcrime/securesms/groups/GroupManagerV2Impl.kt

@@ -56,6 +56,7 @@ import org.session.libsignal.utilities.AccountId
 import org.session.libsignal.utilities.Base64
 import org.session.libsignal.utilities.Log
 import org.session.libsignal.utilities.Namespace
+import org.thoughtcrime.securesms.database.LokiAPIDatabase
 import org.thoughtcrime.securesms.database.LokiMessageDatabase
 import org.thoughtcrime.securesms.database.MmsSmsDatabase
 import org.thoughtcrime.securesms.database.ThreadDatabase
@@ -79,6 +80,7 @@ class GroupManagerV2Impl @Inject constructor(
     @ApplicationContext val application: Context,
     private val clock: SnodeClock,
     private val messageDataProvider: MessageDataProvider,
+    private val lokiAPIDatabase: LokiAPIDatabase,
 ) : GroupManagerV2 {
     private val dispatcher = Dispatchers.Default
 
@@ -472,6 +474,8 @@ class GroupManagerV2Impl @Inject constructor(
             storage.getThreadId(Address.fromSerialized(groupId.hexString))
                 ?.let(storage::deleteConversation)
             configFactory.removeGroup(groupId)
+            lokiAPIDatabase.clearLastMessageHashes(groupId.hexString)
+            lokiAPIDatabase.clearReceivedMessageHashValues(groupId.hexString)
         }
     }
 

libsignal/src/main/java/org/session/libsignal/database/LokiAPIDatabaseProtocol.kt

@@ -17,9 +17,11 @@ interface LokiAPIDatabaseProtocol {
     fun setSwarm(publicKey: String, newValue: Set<Snode>)
     fun getLastMessageHashValue(snode: Snode, publicKey: String, namespace: Int): String?
     fun setLastMessageHashValue(snode: Snode, publicKey: String, newValue: String, namespace: Int)
+    fun clearLastMessageHashes(publicKey: String)
     fun clearAllLastMessageHashes()
     fun getReceivedMessageHashValues(publicKey: String, namespace: Int): Set<String>?
     fun setReceivedMessageHashValues(publicKey: String, newValue: Set<String>, namespace: Int)
+    fun clearReceivedMessageHashValues(publicKey: String)
     fun clearReceivedMessageHashValues()
     fun getAuthToken(server: String): String?
     fun setAuthToken(server: String, newValue: String?)