public List<MusiсDir> SupplementMusicDirs(IDictionary<long, string> mdirs)
{
var newDirs = new List<MusiсDir>();
var newOffsets = new List<DownloadOffset>();
foreach (var key in mdirs.Keys.Where(id => Context.MusiсDirs.Count(md => md.Gid == id) == 0))
{
var name = mdirs[key];
var dir = new MusiсDir();
dir.Gid = key;
dir.NameDir = mdirs[key];
dir.NegativeRating = 0;
dir.PositiveRating = 0;
newDirs.Add(dir);
var offset = new DownloadOffset();
offset.MusiсDir = dir;
offset.Offset = 0;
newOffsets.Add(offset);
}
Context.MusiсDirs.AddRange(newDirs);
Context.DownloadOffsets.AddRange(newOffsets);
Context.SaveChanges();
return newDirs;
}
public static void GetGroupTracks(MusiсDir dir, long offset, Action<IList<Track>> callback)
{
var method = "audio.get";
var param = new Dictionary<string, object>();
param["offset"] = offset.ToString();
param["count"] = 100;
param["owner_id"] = "-" + dir.Gid;
param["version"] = @"5.34";
using (var wc = new WebClient())
{
//wc.Proxy.Credentials = CredentialCache.DefaultCredentials;
wc.DownloadStringCompleted += (s, e) =>
{
if (e.Result != null)
{
var result = new List<Track>();
var json = new JavaScriptSerializer().Deserialize<Dictionary<string, object>>(e.Result);
var root = json["response"] as ArrayList;
foreach (var dirInfo in root)
//if (dirInfo is Dictionary<string, object>)
{
var tmp = dirInfo as Dictionary<string, object>;
if (tmp != null &&
tmp.ContainsKey("aid") &&
tmp.ContainsKey("url") &&
tmp.ContainsKey("artist") &&
tmp.ContainsKey("duration") &&
tmp.ContainsKey("title"))
{
var track = new Track()
{
Tid = (int)tmp["aid"],
MusicDirID = dir.MusicDirID,
TrackAuthor = tmp["artist"] as string,
TrackDuration = (int)tmp["duration"],
TrackUrl = tmp["url"] as string,
TrackName = tmp["title"] as string
};
result.Add(track);
}
}
callback(result);
}
};
wc.DownloadStringAsync(Request(method, param));
}
}
public void CloseDirForSearch(MusiсDir dir)
{
dir.CloseForSearch = 1;
Context.SaveChanges();
}
private void GetFromCash(MusiсDir dir, Action<Track> callback)
{
if (!_cashTracks.ContainsKey(dir.MusicDirID))
_cashTracks[dir.MusicDirID] = new List<Track>();
int offset = _cachOffsets.ContainsKey(dir.MusicDirID) ? _cachOffsets[dir.MusicDirID] : 0;
if (_cashTracks == null || _cashTracks[dir.MusicDirID].Count == 0)
{
VKApi.GetGroupTracks(dir, offset, dict =>
{
_cashTracks[dir.MusicDirID].AddRange(dict.Where(k => Context.Tracks.Count(t => t.Tid == k.Tid) == 0).ToList());
if (_cashTracks[dir.MusicDirID].Count == 0 && dict.Count < 100)
callback(null);
else
{
_cachOffsets[dir.MusicDirID] = offset;
GetFromCash(dir, callback);
}
});
}
else
{
int index = _rand.Next(_cashTracks[dir.MusicDirID].Count);
Track track = null;
do
{
if (_cashTracks[dir.MusicDirID].Count == 0)
{
track = null;
break;
}
track = _cashTracks[dir.MusicDirID][index];
_cashTracks[dir.MusicDirID].RemoveAt(index);
index = (index + 1) % _cashTracks[dir.MusicDirID].Count();
}
while (Context.Tracks.Count(t => t.Tid == track.Tid) > 0);
if (track == null)
{
_cachOffsets[dir.MusicDirID] = offset + 100;
GetFromCash(dir, callback);
}
else
{
callback(track);
}
}
}
