1 files changed, 117 insertions, 0 deletions
diff --git a/Jellyfin.Api/Models/UserDtos/LrcLyricsProvider.cs b/Jellyfin.Api/Models/UserDtos/LrcLyricsProvider.cs
new file mode 100644
index 000000000..029acd6ca
--- /dev/null
+++ b/Jellyfin.Api/Models/UserDtos/LrcLyricsProvider.cs
@@ -0,0 +1,117 @@
+using System;
+using System.Collections.Generic;
+using System.Collections.ObjectModel;
+using System.Dynamic;
+using System.Globalization;
+using System.Linq;
+using LrcParser.Model;
+using LrcParser.Parser;
+using MediaBrowser.Controller.Entities;
+
+namespace Jellyfin.Api.Models.UserDtos
+{
+    /// <summary>
+    /// LRC File Lyric Provider.
+    /// </summary>
+    public class LrcLyricsProvider : ILyricsProvider
+    {
+        /// <summary>
+        /// Initializes a new instance of the <see cref="LrcLyricsProvider"/> class.
+        /// </summary>
+        public LrcLyricsProvider()
+        {
+            FileExtensions = new Collection<string>
+            {
+                "lrc"
+            };
+        }
+
+        /// <summary>
+        /// Gets a value indicating the File Extenstions this provider works with.
+        /// </summary>
+        public Collection<string>? FileExtensions { get; }
+
+        /// <summary>
+        /// Gets or Sets a value indicating whether Process() generated data.
+        /// </summary>
+        /// <returns><c>true</c> if data generated; otherwise, <c>false</c>.</returns>
+        public bool HasData { get; set; }
+
+        /// <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>
+        public void Process(BaseItem item)
+        {
+            string? lyricFilePath = Helpers.ItemHelper.GetLyricFilePath(item.Path);
+
+            if (string.IsNullOrEmpty(lyricFilePath))
+            {
+                return;
+            }
+
+            List<Lyric> lyricsList = new List<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;
+            }
+
+            if (!sortedLyricData.Any())
+            {
+                return;
+            }
+
+            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 Lyric { Start = Math.Ceiling(ticks), Text = sortedLyricData[i].Text });
+            }
+
+            this.HasData = true;
+            if (metaData.Any())
+            {
+                this.Data = new { MetaData = metaData, lyrics = lyricsList };
+            }
+            else
+            {
+                this.Data = new { lyrics = lyricsList };
+            }
+        }
+    }
+}