/// <summary>
/// Initializes a new instance of the <see cref="RequestObserver"/> class.
/// </summary>
/// <param name="client">The client.</param>
/// <param name="options">The options.</param>
public RequestObserver(Client client, RequestOptions options)
{
_cache = client.Cache;
_cachedResults = new Subject <Result>();
_downloadedResults = new Subject <Result>();
_downloadRequired = new Subject <UrlRequest>();
var downloader = new DownloadObserver(client.Cache, client.RequestTimeout, _downloadedResults);
_downloadRequired
.Buffer(client.BufferTimeout, 20)
.Where(reqs => reqs.Count > 0)
.Select(reqs =>
new EmbedlyRequest(
new Uri(@"http://api.embed.ly/1/oembed?format=json&key=" + client.Key + @"&urls=" + string.Join(",", reqs.Select(req => Uri.EscapeDataString(req.Url.OriginalString))) +
options.GetQueryString()),
reqs
)
)
.Subscribe(downloader);
Output = _cachedResults.Merge(_downloadedResults);
}
