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/*
* SoundCloudIO.cs
*
*
* Copyright 2012 Paul Mackin
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
using Banshee.Collection.Database;
using Hyena;
using Hyena.Data;
using Hyena.Json;
using System;
using System.Collections.Generic;
using System.IO;
using System.Net;
namespace Banshee.SoundCloud
{
public static class IO
{
public static JsonArray MakeRequest(string request, string data)
{
string url = "";
switch(request)
{
// Search in Tracks, People and Groups.
case "tracks":
url = "http://api.soundcloud.com/tracks.json?q=" + data + "&client_id=" + SC.APPKEY;
break;
case "people":
url = "http://api.soundcloud.com/users.json?q=" + data + "&client_id=" + SC.APPKEY;
break;
case "groups":
url = "http://api.soundcloud.com/groups.json?q=" + data + "&client_id=" + SC.APPKEY;
break;
// Retrieve a user's info, sets and tracks
case "getuser":
url = "http://api.soundcloud.com/users/" + data + ".json?client_id=" + SC.APPKEY;
break;
case "getsets":
url = "http://api.soundcloud.com/playlists/" + data + ".json?client_id=" + SC.APPKEY;
break;
case "getalltracks":
url = "http://api.soundcloud.com/users/" + data + "/tracks.json?client_id=" + SC.APPKEY;
break;
default:
throw new Exception("Invalid request");
}
return ServerRequest(url);
}
public static JsonArray MakeRequest(string request, int data)
{
return MakeRequest(request, data.ToString());
}
public static JsonArray ServerRequest(string requestUrl)
{
try
{
HttpWebRequest request = WebRequest.Create(requestUrl) as HttpWebRequest;
using(HttpWebResponse response = request.GetResponse() as HttpWebResponse)
{
if(response.StatusCode != HttpStatusCode.OK) {
string s = String.Format("Server error(HTTP {0}: {1}).",
response.StatusCode, response.StatusDescription);
throw new Exception(s);
}
Stream receiveStream = response.GetResponseStream();
Deserializer d = new Deserializer(receiveStream);
object jd = d.Deserialize();
JsonArray ja = jd as JsonArray;
response.Close();
receiveStream.Close();
return ja;
}
}
catch(Exception e)
{
SC.log(e.Message);
return null;
}
}
public static DatabaseTrackInfo makeTrackInfo(JsonObject o)
{
JsonObject user = (JsonObject)o["user"];
DatabaseTrackInfo track = new DatabaseTrackInfo();
track.Uri = new SafeUri(GetStreamURLFromTrack(o));
track.TrackTitle = (string)o["title"];
track.ArtistName = (string)user["username"];
track.Comment =(string)o["description"];
track.Genre =(string)o["genre"];
track.Year = extractYear(o);
return track;
}
public static int extractYear(JsonObject track)
{
string y = (string)track["created_at"];
return Convert.ToInt32(y.Substring(0, 4));
}
public static string GetStreamURLFromTrack(JsonObject track)
{
string waveform_url =(string)track["waveform_url"];
string url_id = waveform_url.Substring(21); // chop off leading URL
int end = url_id.IndexOf('_');
url_id = url_id.Remove(end);
return String.Format("http://media.soundcloud.com/stream/{0}?stream_token={1}", url_id, SC.STREAMKEY);
}
}
}
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