public R SavePlaylist(Playlist plist)
{
if (plist == null)
{
throw new ArgumentNullException(nameof(plist));
}
if (!IsNameValid(plist.Name))
{
return("Invalid playlist name.");
}
var di = new DirectoryInfo(data.PlaylistPath);
if (!di.Exists)
{
return("No playlist directory has been set up.");
}
var fi = GetFileInfo(plist.Name);
if (fi.Exists)
{
var tempList = LoadPlaylist(plist.Name, true);
if (!tempList)
{
return("Existing playlist ist corrupted, please use another name or repair the existing.");
}
if (tempList.Value.CreatorDbId.HasValue && tempList.Value.CreatorDbId != plist.CreatorDbId)
{
return("You cannot overwrite a playlist which you dont own.");
}
}
using (var sw = new StreamWriter(fi.Open(FileMode.Create, FileAccess.Write, FileShare.Read), FileEncoding))
{
sw.WriteLine("version:1");
if (plist.CreatorDbId.HasValue)
{
sw.Write("owner:");
sw.Write(plist.CreatorDbId.Value);
sw.WriteLine();
}
sw.WriteLine();
foreach (var pli in plist.AsEnumerable())
{
if (pli.HistoryId.HasValue)
{
sw.Write("id:");
if (pli.Meta.ResourceOwnerDbId.HasValue)
{
sw.Write(pli.Meta.ResourceOwnerDbId.Value);
}
sw.Write(":");
sw.Write(pli.HistoryId.Value);
}
else if (!string.IsNullOrWhiteSpace(pli.Link))
{
sw.Write("ln:");
if (pli.Meta.ResourceOwnerDbId.HasValue)
{
sw.Write(pli.Meta.ResourceOwnerDbId.Value);
}
sw.Write(":");
if (pli.AudioType.HasValue)
{
sw.Write(pli.AudioType.Value);
}
sw.Write(",");
sw.Write(Uri.EscapeDataString(pli.Link));
}
else if (pli.Resource != null)
{
sw.Write("rs:");
if (pli.Meta.ResourceOwnerDbId.HasValue)
{
sw.Write(pli.Meta.ResourceOwnerDbId.Value);
}
sw.Write(":");
sw.Write(pli.Resource.AudioType);
sw.Write(",");
sw.Write(Uri.EscapeDataString(pli.Resource.ResourceId));
sw.Write(",");
sw.Write(Uri.EscapeDataString(pli.Resource.ResourceTitle));
}
else
{
continue;
}
sw.WriteLine();
}
}
return(R.OkR);
}
public R <Playlist> LoadPlaylist(string name, bool headOnly = false)
{
if (name.StartsWith(".", StringComparison.Ordinal))
{
var result = GetSpecialPlaylist(name);
if (result)
{
return(result);
}
}
var fi = GetFileInfo(name);
if (!fi.Exists)
{
return("Playlist not found");
}
using (var sr = new StreamReader(fi.Open(FileMode.Open, FileAccess.Read, FileShare.Read), FileEncoding))
{
var plist = new Playlist(name);
// Info: version:<num>
// Info: owner:<dbid>
// Line: <kind>:<data,data,..>:<opt-title>
string line;
// read header
while ((line = sr.ReadLine()) != null)
{
if (string.IsNullOrEmpty(line))
{
break;
}
var kvp = line.Split(new[] { ':' }, 2);
if (kvp.Length < 2)
{
continue;
}
string key = kvp[0];
string value = kvp[1];
switch (key)
{
case "version": // skip, not yet needed
break;
case "owner":
if (plist.CreatorDbId != null)
{
return("Invalid playlist file: duplicate userid");
}
ulong userid;
if (ulong.TryParse(value, out userid))
{
plist.CreatorDbId = userid;
}
else
{
return("Broken playlist header");
}
break;
}
}
if (headOnly)
{
return(plist);
}
// read content
while ((line = sr.ReadLine()) != null)
{
var kvp = line.Split(new[] { ':' }, 3);
if (kvp.Length < 3)
{
Log.Write(Log.Level.Warning, "Erroneus playlist split count: {0}", line);
continue;
}
string kind = kvp[0];
string optOwner = kvp[1];
string content = kvp[2];
var meta = new MetaData();
if (string.IsNullOrWhiteSpace(optOwner))
{
meta.ResourceOwnerDbId = null;
}
else if (ulong.TryParse(optOwner, out ulong userid))
{
meta.ResourceOwnerDbId = userid;
}
else
{
Log.Write(Log.Level.Warning, "Erroneus playlist meta data: {0}", line);
}
AudioType audioType;
switch (kind)
{
case "ln":
var lnSplit = content.Split(new[] { ',' }, 2);
if (lnSplit.Length < 2)
{
goto default;
}
#pragma warning disable CS0612
if (!string.IsNullOrWhiteSpace(lnSplit[0]) && Enum.TryParse(lnSplit[0], out audioType))
{
plist.AddItem(new PlaylistItem(Uri.UnescapeDataString(lnSplit[1]), audioType, meta));
}
else
{
plist.AddItem(new PlaylistItem(Uri.UnescapeDataString(lnSplit[1]), null, meta));
}
#pragma warning restore CS0612
break;
case "rs":
var rsSplit = content.Split(new[] { ',' }, 3);
if (rsSplit.Length < 3)
{
goto default;
}
if (!string.IsNullOrWhiteSpace(rsSplit[0]) && Enum.TryParse(rsSplit[0], out audioType))
{
plist.AddItem(new PlaylistItem(new AudioResource(Uri.UnescapeDataString(rsSplit[1]), Uri.UnescapeDataString(rsSplit[2]), audioType), meta));
}
else
{
goto default;
}
break;
case "id":
uint hid;
if (!uint.TryParse(content, out hid))
{
goto default;
}
plist.AddItem(new PlaylistItem(hid, meta));
break;
default:
Log.Write(Log.Level.Warning, "Erroneus playlist data block: {0}", line);
break;
}
}
return(plist);
}
}
