public async Task LoadTopStoriesArticlesAsync()
{
if (TopStoriesArticles == null)
{
TopStoriesArticles = new List <Article>();
}
try
{
var articles = await DatabaseOperations.GetInstance().GetCategoryArticlesAsync(TopStories);
if (articles != null && articles.Count > 0)
{
articles = articles.OrderByDescending(o => o.PublishDate).ToList();
foreach (var article in articles)
{
if (TopStoriesArticles.Find(o => o.ArticleId == article.ArticleId) == null)
{
TopStoriesArticles.Add(article);
}
}
}
}
catch (Exception exception)
{
if (Debugger.IsAttached)
{
Debug.WriteLine("DataService:" + exception);
}
}
IsRefreshingTopNewsArticles = false;
NotifyDataRefreshed(DataType.TopStoriesArticles, true);
IsTopStoriesLoaded = true;
}
public void RefreshTopNews()
{
if (TopStoriesArticles == null)
{
TopStoriesArticles = new ObservableCollection <Article>();
}
var expectedCount = TopStoriesArticles.Count + BatchSize;
if (_dataService.TopStoriesArticles.Count > expectedCount)
{
var newArticles = _dataService.TopStoriesArticles.GetRange(TopStoriesArticles.Count, BatchSize);
foreach (var article in newArticles)
{
if (TopStoriesArticles.FirstOrDefault(o => o.ArticleId == article.ArticleId) == null)
{
TopStoriesArticles.Add(article);
}
}
}
_moreTopStoriesAvailable = expectedCount == TopStoriesArticles.Count;
}
public async Task RefreshTopArticlesAsync(bool isForce, int page = 0)
{
try
{
var presentTime = DateTime.UtcNow;
var refresh = false;
refresh = await CanRefreshCategoryAsync(TopStories);
if (refresh || isForce || page != 0)
{
if (!IsRefreshingTopNewsArticles || isForce || page != 0)
{
IsRefreshingTopNewsArticles = true;
var topNews = await _theHinduClient.GetTopArticlesAsync(page);
if (topNews != null && topNews.Count > 0)
{
HeadLineArticle = topNews[0];
if (HeadLineArticle != null && !string.IsNullOrEmpty(HeadLineArticle.Thumbnail))
{
HeadLineArticle.HdThumbnail = HeadLineArticle.Thumbnail.Replace("i.jpg", "e.jpg");
}
topNews = topNews.OrderByDescending(o => o.PublishDate).ToList();
foreach (var newArticle in topNews)
{
newArticle.Category = TopStories;
if (TopStoriesArticles.Find(o => o.ArticleId == newArticle.ArticleId) == null)
{
TopStoriesArticles.Add(newArticle);
}
else
{
var oldArticle = TopStoriesArticles.Find(o => o.ArticleId == newArticle.ArticleId);
if (oldArticle != null && oldArticle.FullDescription != newArticle.FullDescription)
{
oldArticle.FullDescription = newArticle.FullDescription;
}
}
}
IsTopStoriesLoaded = true;
await DatabaseOperations.GetInstance().UpdateCategoryLastAccessedValueAsync(TopStories, DateTime.UtcNow);
SaveHeadLine();
await SaveTopStoriesArticlesAsync();
}
}
}
}
catch (Exception exception)
{
if (Debugger.IsAttached)
{
Debug.WriteLine("DataService:" + exception);
}
}
TopStoriesArticles = TopStoriesArticles.OrderByDescending(o => o.PublishDate).ToList();
IsRefreshingTopNewsArticles = false;
NotifyDataRefreshed(DataType.TopStoriesArticles, true);
}