/// <summary>
/// Query popular topics count
/// </summary>
/// <param name="timeRange">Time range</param>
/// <param name="hostAppHandle">Hosting app handle: Master app or client app</param>
/// <returns>Popular topics feed length</returns>
public async Task <long> QueryPopularTopicsCount(TimeRange timeRange, string hostAppHandle)
{
CTStore store = await this.tableStoreManager.GetStore(ContainerIdentifier.PopularTopics);
RankFeedTable table = this.tableStoreManager.GetTable(ContainerIdentifier.PopularTopics, TableIdentifier.PopularTopicsFeed) as RankFeedTable;
string feedKey = this.GetPopularTopicsFeedKey(timeRange, hostAppHandle);
return(await store.QueryRankFeedLengthAsync(table, ContainerIdentifier.PopularTopics.ToString(), feedKey));
}
