public IEnumerable <NewsSource> GetSources()
{
NewsProviderDef def = db
.NewsProviderDefs
.AsNoTracking()
.Where(x => x.Id == providerDef.Id)
.FirstOrDefault();
if (def == null)
{
return(null);
}
List <NewsSource> result =
db
.NewsSources
.Where(x => x.NewsProviderId == providerDef.Id)
.AsNoTracking()
.ToList();
result
.ForEach(x =>
{
x.NewsProvider = def.Name;
x.NewsSourceUrl = def.Website;
});
return(result);
}
public INewsProvider GetProvider(NewsProviderDef providerDef)
{
INewsProvider provider = null;
if (us.StrsEqual(providerDef.Name, "newsapi.org"))
{
provider = new NewsApiProvider(providerDef, ds, us);
return(provider);
}
provider = new RssProvider(providerDef, db, us);
return(provider);
}
public List <Link> GetArticles(long?newsProviderId, string newsSourceId)
{
if (us.Empty(newsSourceId) || !newsProviderId.HasValue)
{
return(null);
}
NewsProviderDef providerDef = ProviderDefs.FirstOrDefault(x => x.Id == newsProviderId.Value);
if (providerDef == null)
{
return(null);
}
INewsProvider provider = factory.GetProvider(providerDef);
if (provider == null)
{
return(null);
}
string key = op.Value.Cache.NewsSourceKey + newsProviderId.Value + newsSourceId;
List <Link> result;
if (cache.TryGetValue(key, out result))
{
return(result);
}
result = provider.GetLinks(newsSourceId).ToList();
cache.Set(key, result,
new MemoryCacheEntryOptions()
.SetAbsoluteExpiration(TimeSpan.FromMinutes(op.Value.Cache.NewsArticlesRefreshInterval)));
return(result);
}
public RssProvider(NewsProviderDef providerDef, LinksContext db, UtilsService us)
{
this.db = db;
this.us = us;
this.providerDef = providerDef;
}
public NewsApiProvider(NewsProviderDef providerDef, DataService ds, UtilsService us)
{
this.ds = ds;
this.us = us;
this.providerDef = providerDef;
}
