Call keep alive only if not succeded and cap room messages fetch count to 50 instead of 100

app/src/main/java/chat/rocket/android/fragment/chatroom/RoomPresenter.java

@@ -77,7 +77,7 @@ public class RoomPresenter extends BasePresenter<RoomContract.View>
         .observeOn(AndroidSchedulers.mainThread())
         .subscribe(
             success -> {
-              if (success) {
+              if (!success) {
                 connectivityManagerApi.keepAliveServer();
               }
             },
@@ -89,14 +89,13 @@ public class RoomPresenter extends BasePresenter<RoomContract.View>
 
   @Override
   public void loadMoreMessages() {
-
     final Disposable subscription = getSingleRoom()
         .flatMap(messageInteractor::loadMoreMessages)
         .subscribeOn(AndroidSchedulers.from(BackgroundLooper.get()))
         .observeOn(AndroidSchedulers.mainThread())
         .subscribe(
             success -> {
-              if (success) {
+              if (!success) {
                 connectivityManagerApi.keepAliveServer();
               }
             },

rocket-chat-core/src/main/java/chat/rocket/core/interactors/MessageInteractor.kt

@@ -19,7 +19,7 @@ class MessageInteractor(private val messageRepository: MessageRepository,
         val roomHistoryState = RoomHistoryState.builder()
                 .setRoomId(room.roomId)
                 .setSyncState(SyncState.NOT_SYNCED)
-                .setCount(100)
+                .setCount(50)
                 .setReset(true)
                 .setComplete(false)
                 .setTimestamp(0)