private static async Task <IDictionary <Guid, int> > UpdateDownloadedFeedsAsync(IDictionary <Guid, Feed> subscribedFeeds, string fileName, IPersistentManager dbContext)
{
var feedsUpdated = await dbContext.ReadSerializedCopyAsync <List <Feed> >(fileName);
if (feedsUpdated == null || feedsUpdated.Count == 0)
{
return(null);
}
var updatedFeeds = new Dictionary <Guid, int>();
feedsUpdated.ForEach(f =>
{
if (!subscribedFeeds.ContainsKey(f.Id))
{
return;
}
var persistentFeed = subscribedFeeds[f.Id];
var updatedItemCount = FeedHelper.UpdateFeedItems(persistentFeed, f.Items);
if (updatedItemCount > 0)
{
updatedFeeds.Add(persistentFeed.Id, updatedItemCount);
}
persistentFeed.LastUpdatedTime = f.LastUpdatedTime;
});
return(updatedFeeds);
}
private async Task <bool> LoadStoredItemsAsync()
{
if (_storedItems == null || _storedItems.Count == 0)
{
_storedItems = await _dbContext.ReadSerializedCopyAsync <IDictionary <string, Item> >(AppConfig.STORED_ITEM_FILE_NAME);
}
return(_storedItems != null && _storedItems.Count > 0);
}