public Entities.Feed ParseFeed(IEnumerable <XElement> xml, Entities.Feed feed)
{
if (xml.ElementAt(0) == null || xml.ElementAt(0).Element("title") == null)
{
throw new BadFeed();
}
feed.Name = xml.ElementAt(0).Element("title").Value;
return(feed);
}
public Entities.Feed CreateFeed(string url)
{
var feed = new Entities.Feed();
var xml = xmlService.Load(url);
feed = xmlService.ParseFeed(xml, feed);
feed.Url = url;
unitOfWork.RepositoryFeed.Add(feed);
unitOfWork.Save();
return(feed);
}
public Entities.Feed UpdateFeed(Entities.Feed feed)
{
var xml = xmlService.Load(feed.Url);
var items = xmlService.ParseItems(xml, feed);
feed.LastUpdate = DateTime.Now;
unitOfWork.RepositoryFeed.Update(feed);
foreach (var item in items)
{
unitOfWork.RepositoryItem.Add(item);
}
unitOfWork.Save();
return(feed);
}
public List <Item> ParseItems(IEnumerable <XElement> xml, Entities.Feed feed)
{
var items = new List <Item>();
var xmlItems = xml.First().Elements()
.Where(i => i.Name.LocalName.Equals("item") && (!feed.LastUpdate.HasValue || i.Element("pubDate") == null || (i.Element("pubDate") != null && DateTime.Parse(i.Element("pubDate").Value) > feed.LastUpdate.Value)))
.ToList();
foreach (var xmlItem in xmlItems)
{
if (xmlItem.Element("link") == null ||
xmlItem.Element("title") == null)
{
throw new BadFeed();
}
var item = new Item
{
Feed = feed,
Url = xmlItem.Element("link").Value,
Title = xmlItem.Element("title").Value,
Created = DateTime.Now,
};
if (xmlItem.Element("pubDate") != null)
{
DateTime created;
if (DateTime.TryParse(xmlItem.Element("pubDate").Value, out created))
{
item.Created = created;
}
}
items.Add(item);
}
return(items);
}
