public async Task UpdateFeedCache()
{
foreach (var subscription in await this.feedRepository.GetAll())
{
var rssFeed = await RssFeed.CreateFromUrl(subscription.Feed.FeedUrl);
var entries = rssFeed.Entries;
foreach (var entry in entries)
{
entry.FeedId = subscription.Feed.Id;
}
await this.feedRepository.UpdateFeedEntries(entries);
}
}
public async Task <FeedSubscription> Subscribe(string feedUrl)
{
if (feedUrl == null)
{
throw new ArgumentNullException(nameof(feedUrl));
}
if (!await RssFeed.IsValid(feedUrl))
{
throw new FeedException("Invalid feed url or feed content is not supported");
}
var feed = await RssFeed.CreateFromUrl(feedUrl);
var subscription = feed.SubscribeTo();
await feedRepository.AddSubscription(subscription);
return(subscription);
}
private static void UpdateDatabase(IApplicationBuilder app)
{
using (var serviceScope = app.ApplicationServices
.GetRequiredService <IServiceScopeFactory>()
.CreateScope())
{
using (var context = serviceScope.ServiceProvider.GetService <AppDbContext>())
{
context.Database.Migrate();
if (context.FeedSubscriptions.Any())
{
return;
}
var feed1 = RssFeed.CreateFromUrl("http://newsrss.bbc.co.uk/rss/newsonline_world_edition/americas/rss.xml").GetAwaiter().GetResult().SubscribeTo();
var feed2 = RssFeed.CreateFromUrl("https://www.ed.gov/feed").GetAwaiter().GetResult().SubscribeTo();
var feed3 = RssFeed.CreateFromUrl("http://feeds1.nytimes.com/nyt/rss/Sports").GetAwaiter().GetResult().SubscribeTo();
context.FeedSubscriptions.AddRange(new[] { feed1, feed2, feed3 });
context.SaveChanges();
}
}
}