public static async Task <Feed> Init(string feedUri, string name, string type)
{
Feed initFeed = null;
DbgHelper.CurrentNumberOfFeeds("Beginn von Init");
using (var db = new FeedModelContainer())
{
var feedUris = db.Feeds.Select(f => f.Uri).ToList <string>();
if (!feedUris.Contains(feedUri))
{
DbgHelper.CurrentNumberOfFeeds("neue feedUri");
initFeed = new Feed()
{
Uri = feedUri, FeedType = type, Name = name, LastUpdated = DateTime.MinValue
};
}
else
{
DbgHelper.CurrentNumberOfFeeds("Keine neue feedUri");
initFeed = db.Feeds.Where(f => f.Uri.Equals(feedUri)).FirstOrDefault();
}
}
DbgHelper.CurrentNumberOfFeeds("Vor ReadItems");
await initFeed.ReadItems();
return(initFeed);
}
public void SaveItemsToDatabase(IEnumerable <FeedItem> items)
{
using (var db = new FeedModelContainer())
{
DbgHelper.CurrentNumberOfFeeds("Beginn von SaveItemsToDatabase");
var itemUIds = db.FeedItems.Where(i => i.Feed.Id == this.Id).Select(i => i.UId).ToList <string>();
foreach (var item in items)
{
try
{
if (!itemUIds.Contains(item.UId))
{
db.FeedItems.Add(item);
}
}
catch (DbEntityValidationException dbValEx)
{
logger.ErrorException(">>>>>>>>>>>", dbValEx);
}
}
DbgHelper.CurrentNumberOfFeeds("Vor db.SaveChanges");
db.SaveChanges();
DbgHelper.CurrentNumberOfFeeds("Nach db.SaveChanges");
}
}
/// <summary>
/// Setzt das letzte Update des Feeds auf den aktuellen Zeitpunkt (sollte in Event geändert werden)
/// </summary>
public void UpdateFeed()
{
using (var db = new FeedModelContainer())
{
DbgHelper.CurrentNumberOfFeeds("Beginn von UpdateFeed");
var feed = db.Feeds.Where(f => f.Id == this.Id).FirstOrDefault();
if (feed != null)
{
DbgHelper.CurrentNumberOfFeeds("Feed gefunden");
feed.LastUpdated = DateTime.Now;
db.SaveChanges();
DbgHelper.CurrentNumberOfFeeds("Nach db.SaveChanges");
}
}
}
public async Task ReadItems()
{
DbgHelper.CurrentNumberOfFeeds("Beginn von ReadItems");
IEnumerable <FeedItem> items = new List <FeedItem>();
switch (FeedType)
{
case Param.FeedTypeFile: items = await FeedHelper.ReadItemsFromFile(Uri, this);
break;
case Param.FeedTypeWeb: items = await FeedHelper.ReadItemsFromWeb(Uri, this);
break;
}
if (items.Count() > 0)
{
DbgHelper.CurrentNumberOfFeeds("items.Count > 0");
SaveItemsToDatabase(items);
DbgHelper.CurrentNumberOfFeeds("Nach SaveItemsToDatabase");
UpdateFeed();
DbgHelper.CurrentNumberOfFeeds("Nach UpdateFeed");
}
}
