jellyfin/MediaBrowser.Providers/Lyric/LrcLyricProvider.cs
2022-09-15 20:49:25 -04:00

120 lines
4.3 KiB
C#

using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Dynamic;
using System.Globalization;
using System.Linq;
using System.Threading.Tasks;
using Jellyfin.Api.Helpers;
using LrcParser.Model;
using LrcParser.Parser;
using MediaBrowser.Controller.Entities;
using MediaBrowser.Controller.Lyrics;
namespace MediaBrowser.Providers.Lyric
{
/// <summary>
/// LRC File Lyric Provider.
/// </summary>
public class LrcLyricProvider : ILyricProvider
{
/// <summary>
/// Initializes a new instance of the <see cref="LrcLyricProvider"/> class.
/// </summary>
public LrcLyricProvider()
{
Name = "LrcLyricProvider";
SupportedMediaTypes = new Collection<string>
{
"lrc"
};
}
/// <summary>
/// Gets a value indicating the provider name.
/// </summary>
public string Name { get; }
/// <summary>
/// Gets a value indicating the File Extenstions this provider works with.
/// </summary>
public IEnumerable<string> SupportedMediaTypes { get; }
/// <summary>
/// Gets or Sets Data object generated by Process() method.
/// </summary>
/// <returns><c>Object</c> with data if no error occured; otherwise, <c>null</c>.</returns>
public object? Data { get; set; }
/// <summary>
/// Opens lyric file for [the specified item], and processes it for API return.
/// </summary>
/// <param name="item">The item to to process.</param>
/// <returns><placeholder>A <see cref="Task"/> representing the asynchronous operation.</placeholder></returns>
public LyricResponse? GetLyrics(BaseItem item)
{
string? lyricFilePath = LyricInfo.GetLyricFilePath(this, item.Path);
if (string.IsNullOrEmpty(lyricFilePath))
{
return null;
}
List<MediaBrowser.Controller.Lyrics.Lyric> lyricsList = new List<MediaBrowser.Controller.Lyrics.Lyric>();
List<LrcParser.Model.Lyric> sortedLyricData = new List<LrcParser.Model.Lyric>();
var metaData = new ExpandoObject() as IDictionary<string, object>;
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.ToArray()[0].Value).ToList();
// Parse metadata rows
var metaDataRows = lyricData.Lyrics
.Where(x => x.TimeTags.Count == 0)
.Where(x => x.Text.StartsWith("[", StringComparison.Ordinal) && x.Text.EndsWith("]", StringComparison.Ordinal))
.Select(x => x.Text)
.ToList();
foreach (string metaDataRow in metaDataRows)
{
var metaDataField = metaDataRow.Split(":");
string metaDataFieldName = metaDataField[0].Replace("[", string.Empty, StringComparison.Ordinal);
string metaDataFieldValue = metaDataField[1].Replace("]", string.Empty, StringComparison.Ordinal);
metaData.Add(metaDataFieldName, metaDataFieldValue);
}
}
catch
{
return null;
}
if (!sortedLyricData.Any())
{
return null;
}
for (int i = 0; i < sortedLyricData.Count; i++)
{
var timeData = sortedLyricData[i].TimeTags.ToArray()[0].Value;
double ticks = Convert.ToDouble(timeData, new NumberFormatInfo()) * 10000;
lyricsList.Add(new MediaBrowser.Controller.Lyrics.Lyric { Start = Math.Ceiling(ticks), Text = sortedLyricData[i].Text });
}
if (metaData.Any())
{
return new LyricResponse { MetaData = metaData, Lyrics = lyricsList };
}
return new LyricResponse { Lyrics = lyricsList };
}
}
}