private async Task <UrlCacheInfo> InsertUrl(Uri uri)
{
var realm = Realm.GetInstance();
UrlCacheInfo hero = null;
var response = await FetchFromWeb(uri);
if (string.IsNullOrEmpty(response))
{
return(hero);
}
var timestamp = DateTime.Now.Ticks;
realm.Write(() =>
{
hero = realm.CreateObject <UrlCacheInfo>();
hero.Response = response;
hero.Url = uri.OriginalString;
hero.Created = timestamp;
hero.LastAccessed = timestamp;
hero.LastUpdated = timestamp;
});
_log.Log("New url cached: " + uri.OriginalString);
return(hero);
}
private async Task UpdateUrl(Uri uri, UrlCacheInfo hero)
{
var realm = Realm.GetInstance();
var response = await FetchFromWeb(uri);
if (string.IsNullOrEmpty(response))
{
return;
}
var timestamp = DateTime.Now.Ticks;
realm.Write(() =>
{
hero.Response = response;
hero.Url = uri.OriginalString;
hero.LastAccessed = timestamp;
hero.LastUpdated = timestamp;
});
}
private bool ShouldInvalidate(UrlCacheInfo hero, long freshnessTreshold)
{
return(TimeSpanBetween(hero.LastUpdated, DateTime.Now.Ticks) > freshnessTreshold);
}
