protected async override Task <FetchArticlesResult> FetchArticlesAsync(int pageNumber = 1, int pageSize = Constants.DefaultArticlesPageSize)
{
System.Diagnostics.Debug.WriteLine($"{GetType().Name} FetchArticlesAsync for {Title} Source");
var result = new FetchArticlesResult(pageNumber, pageSize);
var articles = await NewsDataService.FetchArticlesBySource(Source);
if (articles?.Articles != null)
{
result.Articles = articles.Articles.Select(a => new ArticleViewModel(a)).ToList();
result.TotalCount = articles.TotalCount;
}
return(result);
}
private void LoadArticlesPage(FetchArticlesResult articles)
{
var nextPage = Articles.VirtualPage + 1;
if (nextPage != articles.PageNumber)
{
// Already loaded, discarding the result
return;
}
Articles.AddPage(articles.Articles, articles.TotalCount, articles.PageNumber, articles.PageSize);
LoadMoreCommand.ChangeCanExecute();
Raise(nameof(IsEmpty));
}
protected override Task <FetchArticlesResult> FetchArticlesAsync(int pageNumber = 1, int pageSize = Constants.DefaultArticlesPageSize)
{
var result = new FetchArticlesResult(pageNumber, pageSize);
var favoritesService = DependencyService.Resolve <IFavoritesService>();
var favorites = favoritesService.Get()
.Select(f => new ArticleViewModel(f))
.ToList();
if (favorites != null)
{
result.Articles = favorites;
result.TotalCount = favorites.Count;
}
;
return(Task.FromResult(result));
}
protected async override Task <FetchArticlesResult> FetchArticlesAsync(int pageNumber = 1, int pageSize = Constants.DefaultArticlesPageSize)
{
var result = new FetchArticlesResult(pageNumber, pageSize);
if (string.IsNullOrWhiteSpace(SearchTerm))
{
return(result);
}
System.Diagnostics.Debug.WriteLine($"{GetType().Name} FetchArticlesAsync for [{SearchTerm}] Search Term");
var articles = await NewsDataService.FetchArticlesBySearchQuery(SearchTerm);
if (articles?.Articles != null)
{
result.Articles = articles.Articles.Select(a => new ArticleViewModel(a)).ToList();
result.TotalCount = articles.TotalCount;
}
return(result);
}
