public async Task LoadSavedArticlesAsync()
{
if (SavedArticles == null)
{
SavedArticles = new List <Article>();
}
try
{
var articles = await DatabaseOperations.GetInstance().GetSavedArticlesAsync();
if (articles == null || articles.Count <= 0)
{
return;
}
articles = articles.OrderByDescending(o => o.PublishDate).ToList();
foreach (var article in articles.Where(article => SavedArticles.Find(o => o.ArticleId == article.ArticleId) == null))
{
SavedArticles.Add(article);
}
}
catch (Exception exception)
{
if (Debugger.IsAttached)
{
Debug.WriteLine("DataService:" + exception);
}
}
NotifySavedArticlesChanged();
}
public async Task DeleteSavedArticleAsync(Article article)
{
if (article == null)
{
return;
}
try
{
SavedArticles.Find(o => o.ArticleId == article.ArticleId).IsSaved = false;
await SaveSavedArticlesAsync();
SavedArticles.Remove(article);
CurrentSavedArticle = SavedArticles.Count > 0 ? SavedArticles[0] : null;
UpdateSavedArticleMoveStates();
NotifyCurrentSavedArticleChanged(CurrentSavedArticle);
NotifySavedArticlesChanged();
}
catch (Exception exception)
{
if (Debugger.IsAttached)
{
Debug.WriteLine("DataService:" + exception);
}
}
}
public async Task SaveCurrentArticleAsync(Article article)
{
try
{
if (IsArticleAlreadySaved(article))
{
return;
}
CanSaveCurrentArticle = false;
article.IsSaved = true;
SavedArticles.Add(article);
await SaveSavedArticlesAsync();
NotifySavedArticlesChanged();
}
catch (Exception exception)
{
if (Debugger.IsAttached)
{
Debug.WriteLine("DataService:" + exception);
}
}
}
public bool IsArticleAlreadySaved(Article article)
{
if (article != null && SavedArticles != null)
{
return(SavedArticles.Any(savedArticle => savedArticle.ArticleId == article.ArticleId));
}
return(false);
}
public Article GetSavedArticlesFromId(string id)
{
if (SavedArticles != null)
{
CurrentSavedArticle = SavedArticles.Find(o => o.ArticleId == id);
UpdateSavedArticleMoveStates();
return(CurrentSavedArticle);
}
else
{
return(null);
}
}
public async Task <bool> SaveArticle(int userId, int articleId)
{
var save = new SavedArticles()
{
ArticleID = articleId,
UsreID = userId
};
await _savedArticlesRepository.CreateAsync(save);
await _savedArticlesRepository.SaveAsync();
return(true);
}
public async void DeleteAllSavedArticles()
{
try
{
if (SavedArticles != null)
{
SavedArticles.ForEach(o => o.IsSaved = false);
}
await SaveSavedArticlesAsync();
SavedArticles.Clear();
CurrentSavedArticle = null;
CanSaveCurrentArticle = true;
NotifySavedArticlesChanged();
}
catch (Exception exception)
{
if (Debugger.IsAttached)
{
Debug.WriteLine("DataService:" + exception);
}
}
}
