PR #1615 fixes

app/src/main/java/chat/rocket/android/chatroom/adapter/ChatRoomAdapter.kt

@@ -160,8 +160,7 @@ class ChatRoomAdapter(
             return@filter (matchedIndex < 0)
         }
         //At the second stage we are inserting new received elements into set.
-        if (filteredDataSet.size == 0)
-            return
+        if (filteredDataSet.isEmpty()) return
         this.dataSet.addAll(0, filteredDataSet)
         val tmp = this.dataSet.sortedWith(Comparator { t, t2 -> t.message.timestamp.compareTo(t2.message.timestamp) }).reversed()
         this.dataSet.clear()

app/src/main/java/chat/rocket/android/server/infraestructure/MemoryMessagesRepository.kt

@@ -9,8 +9,8 @@ class MemoryMessagesRepository : MessagesRepository {
 
     private var lastSyncDate: Long? = null
 
-    override suspend fun saveLastSyncDate(it: Long) {
-        lastSyncDate = it
+    override suspend fun saveLastSyncDate(currentTimeMillis: Long) {
+        lastSyncDate = currentTimeMillis
     }
 
     override suspend fun getLastSyncDate() = lastSyncDate

app/src/main/java/chat/rocket/android/server/infraestructure/SharedPreferencesMessagesRepository.kt

@@ -27,7 +27,6 @@ class SharedPreferencesMessagesRepository(
         currentServerInteractor.get()?.also { server ->
             if (!prefs.contains(getSyncDateKey(server)))
                 return@withContext null
-            //
             val time = prefs.getLong(getSyncDateKey(server), -1)
             return@withContext if (time == -1L) null else time
         }