using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Globalization;
using System.Linq;
using LrcParser.Model;
using LrcParser.Parser;
using MediaBrowser.Controller.Entities;
using MediaBrowser.Controller.Lyrics;
namespace MediaBrowser.Providers.Lyric;
///
/// LRC Lyric Provider.
///
public class LrcLyricProvider : ILyricProvider
{
///
public string Name { get; } = "LrcLyricProvider";
///
public IEnumerable SupportedMediaTypes
{
get => new Collection
{
"lrc"
};
}
///
/// Opens lyric file for the requested item, and processes it for API return.
///
/// The item to to process.
/// If provider can determine lyrics, returns a with or without metadata; otherwise, null.
public LyricResponse? GetLyrics(BaseItem item)
{
string? lyricFilePath = LyricInfo.GetLyricFilePath(this, item.Path);
if (string.IsNullOrEmpty(lyricFilePath))
{
return null;
}
List lyricList = new List();
List sortedLyricData = new List();
IDictionary metaData = new Dictionary();
string lrcFileContent = System.IO.File.ReadAllText(lyricFilePath);
try
{
// Parse and sort lyric rows
LyricParser lrcLyricParser = new LrcParser.Parser.Lrc.LrcParser();
Song lyricData = lrcLyricParser.Decode(lrcFileContent);
sortedLyricData = lyricData.Lyrics.Where(x => x.TimeTags.Count > 0).OrderBy(x => x.TimeTags.First().Value).ToList();
// Parse metadata rows
var metaDataRows = lyricData.Lyrics
.Where(x => x.TimeTags.Count == 0)
.Where(x => x.Text.StartsWith('[') && x.Text.EndsWith(']'))
.Select(x => x.Text)
.ToList();
foreach (string metaDataRow in metaDataRows)
{
var metaDataField = metaDataRow.Split(':');
if (metaDataField.Length != 2)
{
continue;
}
string metaDataFieldName = metaDataField[0][1..].Trim();
string metaDataFieldValue = metaDataField[1][..^1].Trim();
metaData.Add(metaDataFieldName, metaDataFieldValue);
}
}
catch
{
return null;
}
if (sortedLyricData.Count == 0)
{
return null;
}
for (int i = 0; i < sortedLyricData.Count; i++)
{
var timeData = sortedLyricData[i].TimeTags.First().Value;
if (timeData is null)
{
continue;
}
long ticks = TimeSpan.FromMilliseconds((double)timeData).Ticks;
lyricList.Add(new Controller.Lyrics.Lyric(sortedLyricData[i].Text, ticks));
}
if (metaData.Any())
{
return new LyricResponse { Metadata = metaData, Lyrics = lyricList };
}
return new LyricResponse { Lyrics = lyricList };
}
}