private Topic GetTopic(DBContext db, entity.Topic topic, entity.db.Source sourceModel, IEnumerable <Category> categories)
{
var existTopic = db.Topics.Find(topic.Guid);
if (existTopic != null)
{
return(existTopic);
}
var topicCategories = categories.Select(category => new TopicCategory {
Category = category
}).ToList();
var dbSources = db.Sources.Find(sourceModel.Id);
existTopic = new Topic
{
Guid = topic.Guid,
Creator = topic.Creator,
Description = topic.Description,
Link = topic.Link,
PublisDate = topic.PublisDate,
Title = topic.Title,
Source = dbSources,
TopicCategories = topicCategories
};
db.Topics.Add(existTopic);
db.SaveChanges();
return(existTopic);
}
public IEnumerable <Topic> GetTopics(entity.db.Source souce)
{
var browserOpearation = new BrowserOperation();
var xmlDocument = browserOpearation.DawloadXML(souce.Url);
var rawTopics = ParseItems(xmlDocument, souce);
var topics = rawTopics.Select(rawTopic => CastToTopic(rawTopic));
return(topics);
}
private IEnumerable <System.Xml.XmlNode> ParseItems(System.Xml.XmlDocument xmlDocument, entity.db.Source source)
{
try
{
return(xmlDocument.SelectNodes(source.ItemParsePath).Cast <System.Xml.XmlNode>());
}
catch (System.Xml.XmlException e)
{
System.Console.WriteLine(e);
return(null);
}
}