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PlayApi.cs
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PlayApi.cs
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using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Reactive;
using System.Reactive.Linq;
using System.Text;
using System.Text.RegularExpressions;
using System.Threading.Tasks;
using System.Windows.Media.Imaging;
using Akavache;
using Ninject;
using PusherClientDotNet;
using ReactiveUI;
using RestSharp;
using RestSharp.Contrib;
namespace Play.Models
{
public interface IPlayApi
{
IObservable<Song> NowPlaying();
IObservable<BitmapImage> FetchImageForAlbum(Song song);
IObservable<string> ListenUrl();
IObservable<List<Song>> Queue();
IObservable<Unit> QueueSong(Song song);
IObservable<Unit> Star(Song song);
IObservable<Unit> Unstar(Song song);
IObservable<List<Song>> Search(string query);
IObservable<List<Song>> AllSongsForArtist(string name);
IObservable<List<Song>> AllSongsOnAlbum(string artist, string album);
IObservable<Tuple<string, byte[]>> DownloadSong(Song song);
IObservable<Tuple<string, byte[]>> DownloadAlbum(string artist, string album);
IObservable<Unit> ConnectToSongChangeNotifications();
}
public class StreamingInfo
{
public string stream_url { get; set; }
public string pusher_key { get; set; }
}
public class PlayApi : IPlayApi, IEnableLogger
{
readonly IRestClient client;
readonly IBlobCache cache;
[Inject]
public PlayApi(IRestClient authedClient, [Named("LocalMachine")] IBlobCache blobCache)
{
client = authedClient;
cache = blobCache;
}
public IObservable<Song> NowPlaying()
{
var rq = new RestRequest("now_playing");
return client.RequestAsync<Song>(rq).Select(x => x.Data);
}
public IObservable<List<Song>> Queue()
{
var rq = new RestRequest("queue");
return client.RequestAsync<SongQueue>(rq).Select(x => {
return x.Data.songs.ToList();
});
}
public IObservable<Unit> QueueSong(Song song)
{
var rq = new RestRequest("queue") {Method = Method.POST};
rq.AddParameter("id", song.id);
return client.RequestAsync(rq).Select(_ => Unit.Default);
}
public IObservable<Unit> Star(Song song)
{
var rq = new RestRequest("star") {Method = Method.POST};
rq.AddParameter("id", song.id);
return client.RequestAsync(rq).Select(_ => Unit.Default);
}
public IObservable<Unit> Unstar(Song song)
{
var rq = new RestRequest("star") {Method = Method.DELETE};
rq.AddParameter("id", song.id);
return client.RequestAsync(rq).Select(_ => Unit.Default);
}
public IObservable<BitmapImage> FetchImageForAlbum(Song song)
{
var rq = new RestRequest(String.Format("images/art/{0}.png", song.id));
var fullUrl = client.BuildUri(rq).ToString();
this.Log().Info("Fetching URL for image: {0}", fullUrl);
return cache.LoadImageFromUrl(fullUrl);
}
public IObservable<List<Song>> Search(string query)
{
var rq = new RestRequest("search");
rq.AddParameter("q", query);
return client.RequestAsync<SongQueue>(rq).Select(x => x.Data.songs);
}
public IObservable<List<Song>> AllSongsForArtist(string name)
{
// NB: https://github.com/play/play/issues/135
var rq = new RestRequest(String.Format("artist/{0}",
HttpUtility.UrlEncode(name).Replace("+", "%20")));
return client.RequestAsync<SongQueue>(rq).Select(x => x.Data.songs);
}
public IObservable<List<Song>> AllSongsOnAlbum(string artist, string album)
{
// NB: https://github.com/play/play/issues/135
var rq = new RestRequest(String.Format("artist/{0}/album/{1}",
HttpUtility.UrlEncode(artist).Replace("+", "%20"),
HttpUtility.UrlEncode(album).Replace("+", "%20")));
return client.RequestAsync<SongQueue>(rq).Select(x => x.Data.songs);
}
public IObservable<Tuple<string, byte[]>> DownloadSong(Song song)
{
var rq = new RestRequest(String.Format("song/{0}/download", song.id));
return client.RequestAsync(rq)
.Select(x => Tuple.Create(fileNameFromResponse(x) ?? "song.mp3", x.RawBytes));
}
public IObservable<Tuple<string, byte[]>> DownloadAlbum(string artist, string album)
{
var rq = new RestRequest(String.Format("artist/{0}/album/{1}/download",
HttpUtility.UrlEncode(artist).Replace("+", "%20"),
HttpUtility.UrlEncode(album).Replace("+", "%20")));
return client.RequestAsync(rq)
.Select(x => Tuple.Create(fileNameFromResponse(x) ?? "songs.zip", x.RawBytes));
}
public IObservable<Unit> ConnectToSongChangeNotifications()
{
var rq = new RestRequest("streaming_info");
return client.RequestAsync<StreamingInfo>(rq)
.SelectMany(x => PusherHelper.Connect<object>(() => new Pusher(x.Data.pusher_key), "now_playing_updates", "update_now_playing"))
.Select(_ => Unit.Default);
}
public IObservable<string> ListenUrl()
{
var rq = new RestRequest("streaming_info");
return client.RequestAsync<StreamingInfo>(rq).Select(x => x.Data.stream_url);
}
string fileNameFromResponse(RestResponse response)
{
var disp = response.Headers.FirstOrDefault(y => y.Name.Equals("content-disposition", StringComparison.InvariantCultureIgnoreCase));
if (disp == null) {
return null;
}
var re = new Regex("filename=\"([^\"]+)\"(;|$)");
var m = re.Match((string) disp.Value);
return m.Success ? m.Groups[1].Value : null;
}
}
}