private bool TryValidateSongGuids(IEnumerable<string> guidStrings, out IEnumerable<Song> foundSongs, out ResponseInfo responseInfo)
{
var guids = new List<Guid>();
foreach (string guidString in guidStrings)
{
Guid guid;
bool valid = Guid.TryParse(guidString, out guid);
if (valid)
{
guids.Add(guid);
}
else
{
responseInfo = CreateResponse(ResponseStatus.MalformedRequest, "One or more GUIDs are malformed");
foundSongs = null;
return false;
}
}
// Look if any song in our local library or any song of the last SoundCloud or YouTube
// requests has the requested Guid
Dictionary<Guid, Song> dic = this.library.Songs
.Concat(this.lastSoundCloudRequest.Cast<Song>())
.Concat(this.lastYoutubeRequest)
.ToDictionary(x => x.Guid);
List<Song> songs = guids.Select(x =>
{
Song song;
dic.TryGetValue(x, out song);
return song;
})
.Where(x => x != null)
.ToList();
if (guids.Count != songs.Count)
{
responseInfo = CreateResponse(ResponseStatus.NotFound, "One or more songs could not be found");
foundSongs = null;
return false;
}
responseInfo = null;
foundSongs = songs;
return true;
}
private bool TryValidateSongGuids(IEnumerable<string> guidStrings, out IEnumerable<Song> foundSongs, out ResponseInfo responseInfo)
{
var guids = new List<Guid>();
foreach (string guidString in guidStrings)
{
Guid guid;
bool valid = Guid.TryParse(guidString, out guid);
if (valid)
{
guids.Add(guid);
}
else
{
responseInfo = CreateResponse(ResponseStatus.MalformedRequest, "One or more GUIDs are malformed");
foundSongs = null;
return false;
}
}
Dictionary<Guid, LocalSong> dic = this.library.Songs.ToDictionary(x => x.Guid);
List<LocalSong> songs = guids.Select(x =>
{
LocalSong song;
dic.TryGetValue(x, out song);
return song;
})
.Where(x => x != null)
.ToList();
if (guids.Count != songs.Count)
{
responseInfo = CreateResponse(ResponseStatus.NotFound, "One or more songs could not be found");
foundSongs = null;
return false;
}
responseInfo = null;
foundSongs = songs;
return true;
}