public async Task <bool> LrcAutoSearch()
{
LrcMissing = false;
LrcSearchBusy = true;
_presenter.Lyrics = null;
var _ttitle = _title;
var _tartist = _artist;
LrcCandidates = new ObservableCollection <ExternalLrcInfo>();
ParsedLrc lrc = null;
try
{
lrc = await LyricsAgent.FetchLyricsAsync(
_title, _artist, _candidates,
LyricsAgent.BuildLyricsFilename(_title, _artist));
}
catch
{
}
if (_ttitle == _title && _tartist == _artist)
{
_presenter.Lyrics = lrc;
LrcSearchBusy = false;
LrcMissing = lrc == null || lrc.Sentences.Count == 0;
return(true);
}
return(false);
}
static void SetMetadata(string line, ParsedLrc lrc)
{
string metadata = line.Substring(4, line.Length - 5);
switch (line[1])
{
case 'a':
if (line[2] == 'l')
{
lrc.Album = metadata;
}
if (line[2] == 'r')
{
lrc.Artist = metadata;
}
break;
case 't':
if (line[2] == 'i')
{
lrc.Title = metadata;
}
break;
}
}
public static ParsedLrc Parse(TextReader reader)
{
ParsedLrc lrc = new ParsedLrc();
string line;
// TextReader will handle the newline well.
while ((line = reader.ReadLine()?.Trim()) != null)
{
var parts = ExtractMorpheme(line);
if (parts == null || parts.Length < 1)
{
continue;
}
// Metadata line
if (parts[0][2] == ':')
{
SetMetadata(line, lrc);
}
var content = parts[parts.Length - 1];
for (int i = 0; i < parts.Length - 1; i++)
{
var time = ParseTime(parts[i]);
if (time != -1)
{
lrc.Sentences.Add(new LrcSentence(time, content));
}
}
}
// List<T>.Sort still creates wrapper around Comparison<T>.
// A straightforward method is using IComparer<T>.
lrc.Sentences.Sort(Comparer.Value);
return(lrc);
}
