/// <summary>
/// Update selected source (Title - Url - Description)
/// </summary>
/// <returns>Task Type</returns>
private async Task UpdateSource()
{
if (IsWorking)
{
return;
}
IsWorking = true;
try
{
SelectedSource.SiteTitle = SourceTitle;
SelectedSource.RssUrl = new Uri(SourceUrl);
SelectedSource.Description = SourceDescription;
var source = await SourceDataService.UpdateSourceAsync(SelectedSource);
if (source == null)
{
await new MessageDialog("SourcesViewModelSourceInfoNotValidMessageDialog".GetLocalized()).ShowAsync();
return;
}
Sources[Sources.IndexOf(SelectedSource)] = SelectedSource;
await new MessageDialog("SourcesViewModelSourceUpdatedMessageDialog".GetLocalized()).ShowAsync();
ClearPopups();
}
catch (Exception ex)
{
Debug.WriteLine(ex);
}
finally
{
IsWorking = false;
}
}
/// <summary>
/// Gets all the feeds from database (with-in limits in settings)
/// the try to gets all the new stuff from your sources
/// add the new ones to the database if there is any
/// then show the latest (with-in limits in settings)
/// </summary>
/// <param name="progress"></param>
/// <param name="token"></param>
/// <returns>Task Type</returns>
public async Task LoadDataAsync(IProgress <int> progress, CancellationToken token)
{
IsLoadingData = true;
FilterSources.Clear();
Feeds.Clear();
ProgressCurrent = 0;
bool hasLoadedFeedNewItems = false;
// Shows the user what's new in this version
await WhatsNewDisplayService.ShowIfAppropriateAsync();
// Set Httpclient userAgent to the user selected one
await RssRequest.SetCustomUserAgentAsync();
foreach (var rss in await RSSDataService.GetFeedsDataAsync(await ApplicationData.Current.LocalSettings.ReadAsync <int>("FeedsLimit")))
{
Feeds.Add(rss);
}
SyndicationFeed feed = null;
var sourcesDataList = await SourceDataService.GetSourcesDataAsync();
ProgressMax = sourcesDataList.Count();
int progressCount = 0;
foreach (var source in sourcesDataList)
{
FilterSources.Add(source);
if (token.IsCancellationRequested)
{
IsLoadingData = false;
TokenSource = new CancellationTokenSource();
MarkAsReadCommand.OnCanExecuteChanged();
return;
}
}
// if there is no internet just cut our loses and get out of here we already loaded the local data
if (!new NetworkInformationHelper().HasInternetAccess)
{
await new MessageDialog("CheckInternetMessageDialog".GetLocalized()).ShowAsync();
return;
}
var WaitAfterLastCheckInMinutes = await ApplicationData.Current.LocalSettings.ReadAsync <int>("WaitAfterLastCheck");
foreach (var sourceItem in FilterSources)
{
bool isFirstItemInFeed = true;
if (token.IsCancellationRequested)
{
IsLoadingData = false;
TokenSource = new CancellationTokenSource();
MarkAsReadCommand.OnCanExecuteChanged();
return;
}
// don't get source feed if x number of minutes haven't passed since the last one - default is 2 hours
var checkSourceAfter = sourceItem.LastBuildCheck.AddMinutes(WaitAfterLastCheckInMinutes);
if (checkSourceAfter >= DateTimeOffset.Now)
{
continue;
}
if (!new NetworkInformationHelper().HasInternetAccess)
{
continue;
}
progress.Report(++progressCount);
//if getting the feed crushed for (internet - not xml rss - other reasons)
//move to the next source on the list to try it instead of stopping every thing
try
{
var feedString = await RssRequest.GetFeedAsStringAsync(sourceItem.RssUrl, token);
feed = new SyndicationFeed();
if (string.IsNullOrWhiteSpace(feedString))
{
continue;
}
else
{
feed.Load(feedString);
// Saves rss items count and last check time to source
sourceItem.CurrentRssItemsCount = feed.Items.Count;
sourceItem.LastBuildCheck = DateTimeOffset.Now;
await SourceDataService.UpdateSourceAsync(sourceItem);
}
}
catch (Exception ex)
{
Debug.WriteLine(ex);
continue;
}
// Iterate through each feed item.
foreach (SyndicationItem syndicationItem in feed.Items)
{
if (token.IsCancellationRequested)
{
IsLoadingData = false;
TokenSource = new CancellationTokenSource();
MarkAsReadCommand.OnCanExecuteChanged();
return;
}
//handle edge cases like when they don't send that stuff or misplace them like freaking reddit r/worldnews
if (syndicationItem.Title == null)
{
syndicationItem.Title = new SyndicationText("MainViewModelNoTitleFound".GetLocalized());
}
if (syndicationItem.Summary == null)
{
syndicationItem.Summary = new SyndicationText("MainViewModelNoSummaryFound".GetLocalized());
}
if (syndicationItem.PublishedDate.Year < 2000)
{
syndicationItem.PublishedDate = syndicationItem.LastUpdatedTime.Year > 2000 ? syndicationItem.LastUpdatedTime : DateTimeOffset.Now;
}
Uri itemNewUri = syndicationItem.ItemUri;
if (itemNewUri == null)
{
if (syndicationItem.Links.Count > 0)
{
itemNewUri = syndicationItem.Links.FirstOrDefault().Uri;
}
}
if (string.IsNullOrWhiteSpace(syndicationItem.Id))
{
syndicationItem.Id = itemNewUri.ToString();
}
var rss = new RSS
{
PostTitle = syndicationItem.Title.Text,
Description = syndicationItem.Summary.Text,
Authors = new List <Author>(),
URL = itemNewUri,
CreatedAt = syndicationItem.PublishedDate.DateTime,
Guid = syndicationItem.Id,
PostSource = sourceItem
};
foreach (var author in syndicationItem.Authors)
{
rss.Authors.Add(new Author
{
Name = author.Name,
Email = author.Email,
Uri = author.Uri
});
}
if (!await RSSDataService.FeedExistAsync(rss))
{
var newRss = await RSSDataService.AddNewFeedAsync(rss);
Feeds.Add(newRss);
hasLoadedFeedNewItems = true;
// Add first item in each source feed to Windows Live Tiles
if (isFirstItemInFeed)
{
Singleton <LiveTileService> .Instance.SampleUpdate(newRss.PostSource.SiteTitle, ShortenText(newRss.PostTitle, 80), ShortenText(newRss.Description, 95));
}
isFirstItemInFeed = false;
}
}
}
if (hasLoadedFeedNewItems)
{
Feeds.Clear();
foreach (var rss in await RSSDataService.GetFeedsDataAsync(await ApplicationData.Current.LocalSettings.ReadAsync <int>("FeedsLimit")))
{
Feeds.Add(rss);
}
}
IsLoadingData = false;
MarkAsReadCommand.OnCanExecuteChanged();
}
/// <summary>
/// Gets all the sources from the database and checks if they still works or not
/// </summary>
/// <param name="progress"></param>
/// <param name="ct"></param>
/// <returns>Task Type</returns>
public async Task LoadDataAsync(IProgress <int> progress, CancellationToken token)
{
IsLoadingData = true;
ProgressCurrent = 0;
Sources.Clear();
var sourcesDataList = await SourceDataService.GetSourcesDataAsync();
ProgressMax = sourcesDataList.Count();
int progressCount = 0;
foreach (var source in sourcesDataList)
{
if (token.IsCancellationRequested)
{
IsLoadingData = false;
TokenSource = new CancellationTokenSource();
return;
}
Sources.Add(source);
progress.Report(++progressCount);
}
RefreshSourcesCommand.OnCanExecuteChanged();
foreach (var item in Sources)
{
if (token.IsCancellationRequested)
{
IsLoadingData = false;
TokenSource = new CancellationTokenSource();
return;
}
try
{
item.IsChecking = true;
var task = await SourceDataService.IsSourceWorkingAsync(item.RssUrl.AbsoluteUri);
item.IsWorking = task.Item1;
item.LastBuildDate = task.Item2;
item.CurrentRssItemsCount = task.Item3;
// Saves latest build date and rss items count to source
await SourceDataService.UpdateSourceAsync(item);
}
catch (HttpRequestException ex)
{
if (ex.Message.StartsWith("Response status code does not indicate success: 403"))
{
item.ErrorMessage = "HttpRequestException403MessageDialog".GetLocalized();
}
else
{
item.ErrorMessage = "HttpRequestExceptionMessageDialog".GetLocalized();
}
Debug.WriteLine(ex);
item.IsError = true;
}
catch (XmlException ex)
{
item.ErrorMessage = "XmlExceptionMessageDialog".GetLocalized();
Debug.WriteLine(ex);
item.IsError = true;
}
catch (ArgumentNullException ex)
{
item.ErrorMessage = "SourcesViewModelSourceUrlNullExceptionMessageDialog".GetLocalized();
Debug.WriteLine(ex);
item.IsError = true;
}
catch (Exception ex)
{
item.ErrorMessage = "SourcesViewModelExceptionMessageDialog".GetLocalized();
Debug.WriteLine(ex);
item.IsError = true;
}
finally
{
item.IsChecking = false;
}
}
IsLoadingData = false;
}