/// <summary>
/// Hämtar alla föremål från ett Feed-objekts RSS-URL som har ett <pubDate> som infaller senare än Feed-objektets LastUpdate och lägger till dem i Feed-objektets FeedItem-lista.
/// </summary>
public void UpdateFeedItems(Feed feed, bool forceUpdate)
{
Debug.WriteLine("Updating feed: \"" + feed.Title + "\".");
if (!forceUpdate && feed.LastUpdate + new TimeSpan(feed.UpdateInterval) > DateTime.Now) return;
Debug.WriteLine("Updating feed items for feed: \"" + feed.Title + "\".");
XmlDocument document = new XmlDocument();
document.Load(feed.FeedUrl);
foreach (XmlNode node in document.DocumentElement.SelectNodes("channel/item"))
{
FeedItem item = new FeedItem();
item.PublicationDate = RssDateToDateTime(InnerTextOrNull(node.SelectSingleNode("pubDate")));
if (!forceUpdate && feed.Items.Count > 0 && item.PublicationDate < feed.Items[0].PublicationDate) break;
item.Title = InnerTextOrNull(node.SelectSingleNode("title"));
item.Link = InnerTextOrNull(node.SelectSingleNode("link"));
item.Description = InnerTextOrNull(node.SelectSingleNode("description"));
item.MediaUrl = ValueOrNull(node.SelectSingleNode("enclosure/@url"));
item.HasBeenPlayed = false;
Debug.WriteLine("Fetching feed item: " + item.Title);
feed.Items.Add(item);
}
feed.LastUpdate = DateTime.Now;
}
public FeedItemDetails(Feed feed, FeedItem feedItem)
{
InitializeComponent();
Feed = feed;
FeedItem = feedItem;
TextBlock_FeedTitle.Inlines.Add(Feed.Title);
Hyperlink h = new Hyperlink();
h.NavigateUri = new Uri(Feed.Link);
h.RequestNavigate += new RequestNavigateEventHandler(Hyperlink_RequestNavigate);
h.Inlines.Add(Feed.Link);
TextBlock_FeedLink.Inlines.Add(h);
TextBlock_FeedDescription.Inlines.Add(Feed.Description);
if (Feed.Category.Name != null)
TextBlock_FeedCategory.Inlines.Add(Feed.Category.Name);
TextBlock_ItemTitle.Inlines.Add(FeedItem.Title);
h = new Hyperlink();
h.NavigateUri = new Uri(FeedItem.Link);
h.RequestNavigate += new RequestNavigateEventHandler(Hyperlink_RequestNavigate);
h.Inlines.Add(FeedItem.Link);
TextBlock_ItemLink.Inlines.Add(h);
TextBlock_ItemDescription.Inlines.Add(FeedItem.Description);
TextBlock_ItemPubDate.Inlines.Add(FeedItem.PublicationDate.ToString());
h = new Hyperlink();
h.NavigateUri = new Uri(FeedItem.MediaUrl);
h.RequestNavigate += new RequestNavigateEventHandler(Hyperlink_RequestNavigate);
h.Click += new RoutedEventHandler(Hyperlink_SetFeedItemHasBeenPlayed);
h.TextDecorations = null;
h.Inlines.Add("play item");
TextBlock_ItemActions.Inlines.Add("[");
TextBlock_ItemActions.Inlines.Add(h);
TextBlock_ItemActions.Inlines.Add("] ");
Span s = new Span();
if (FeedItem.HasBeenPlayed)
{
s.Foreground = Brushes.Green;
s.Inlines.Add("Played");
}
else
{
s.Foreground = Brushes.Red;
s.Inlines.Add("Unplayed");
}
TextBlock_ItemActions.Inlines.Add(s);
}
private void Button_AddNewFeed_Click(object sender, RoutedEventArgs e)
{
RssReader rssReader = new RssReader();
Feed feed = new Feed();
try
{
feed = rssReader.ReadBasicFeed(TextBox_FeedUrl.Text);
Feeds.Add(feed);
rssReader.UpdateFeedItems(feed, true);
MessageBox.Show("A new feed (" + feed.Title + ") was successfully added.");
BuildFeedList();
}
catch (Exception exception){ DisplayErrorMessage(exception.Message); }
finally { TextBox_FeedUrl.Clear(); }
}
public List<Feed> Read(string filename)
{
List<Feed> feeds = new List<Feed>();
if (!File.Exists(filename)) return feeds;
XmlDocument document = new XmlDocument();
document.Load(filename);
foreach (XmlNode node in document.DocumentElement.SelectNodes("Feed"))
{
Feed feed = new Feed();
feed.FeedUrl = InnerTextOrNull(node.SelectSingleNode("FeedUrl"));
feed.Title = InnerTextOrNull(node.SelectSingleNode("Title"));
feed.Link = InnerTextOrNull(node.SelectSingleNode("Link"));
feed.Description = InnerTextOrNull(node.SelectSingleNode("Description"));
feed.Category = new Category() { Name = InnerTextOrNull(node.SelectSingleNode("Category/Name")) };
feed.UpdateInterval = LongOrDefault(node.SelectSingleNode("UpdateInterval"));
feed.LastUpdate = DateTimeOrDefault(node.SelectSingleNode("LastUpdate"));
List<FeedItem> items = new List<FeedItem>();
foreach (XmlNode subNode in node.SelectNodes("Items/FeedItem"))
{
FeedItem item = new FeedItem();
item.Title = InnerTextOrNull(subNode.SelectSingleNode("Title"));
item.Link = InnerTextOrNull(subNode.SelectSingleNode("Link"));
item.Description = InnerTextOrNull(subNode.SelectSingleNode("Description"));
item.MediaUrl = InnerTextOrNull(subNode.SelectSingleNode("MediaUrl"));
item.PublicationDate = DateTimeOrDefault(subNode.SelectSingleNode("PublicationDate"));
item.HasBeenPlayed = BoolOrFalse(subNode.SelectSingleNode("HasBeenPlayed"));
items.Add(item);
}
feed.Items = items;
feeds.Add(feed);
}
return feeds;
}
/// <summary>
/// Hämtar grundläggande information om ett Feed-objekt från en RSS-fil, exempelvis titel och beskrivning. Hämtar INTE avnsnitt.
/// </summary>
public Feed ReadBasicFeed(string url)
{
Feed feed = new Feed();
XmlDocument document = new XmlDocument();
document.Load(url);
XmlNode node = document.DocumentElement.SelectSingleNode("channel");
feed.FeedUrl = url;
feed.Title = InnerTextOrNull(node.SelectSingleNode("title"));
feed.Link = InnerTextOrNull(node.SelectSingleNode("link"));
feed.Description = InnerTextOrNull(node.SelectSingleNode("description"));
feed.Category = new Category();
feed.UpdateInterval = TimeSpan.TicksPerDay;
feed.LastUpdate = DateTime.MinValue;
return feed;
}
public EditFeed(List<Category> categories, Feed feed)
{
InitializeComponent();
Categories = categories;
Feed = feed;
TextBox_FeedUrl.Text = Feed.FeedUrl;
TextBox_Title.Text = Feed.Title;
TextBox_Link.Text = Feed.Link;
TextBox_Description.Text = Feed.Description;
foreach(Category category in Categories)
{
// Ignorerar alla kategorier som är null så att inga föremål med tomma värden blir tillagda
if (!string.IsNullOrEmpty(category.Name))
ComboBox_Category.Items.Add(category.Name);
}
ComboBox_Category.SelectedItem = Feed.Category.Name;
TextBox_UpdateInterval.Text = "" + (Feed.UpdateInterval / TimeSpan.TicksPerMinute);
}
/// <summary>
/// Hämtar alla föremål från ett Feed-objekts RSS-URL som har ett <pubDate> som infaller senare än Feed-objektets LastUpdate och lägger till dem i Feed-objektets FeedItem-lista.
/// </summary>
public void UpdateFeedItems(Feed feed)
{
UpdateFeedItems(feed, false);
}
