From e1a66b8063f5db382903744b595243d444202646 Mon Sep 17 00:00:00 2001
From: andy840119 <andy840119@gmail.com>
Date: Sun, 28 Jul 2024 16:28:29 +0800
Subject: [PATCH] Fix the lrc parser.

---
 LrcParser.Tests/Parser/Lrc/LrcParserTest.cs | 26 +++++++++++----------
 LrcParser/Parser/Lrc/LrcParser.cs           | 25 ++++++++++++++------
 2 files changed, 32 insertions(+), 19 deletions(-)

diff --git a/LrcParser.Tests/Parser/Lrc/LrcParserTest.cs b/LrcParser.Tests/Parser/Lrc/LrcParserTest.cs
index d0c5f22..d1ed788 100644
--- a/LrcParser.Tests/Parser/Lrc/LrcParserTest.cs
+++ b/LrcParser.Tests/Parser/Lrc/LrcParserTest.cs
@@ -14,7 +14,7 @@ public void TestDecode()
     {
         var lrcText = new[]
         {
-            "[00:17:97]帰[00:18:37]り[00:18:55]道[00:18:94]は[00:19:22]",
+            "[00:17.00] <00:00.00>帰<00:01.00>り<00:02.00>道<00:03.00>は<00:04.00>",
         };
 
         var song = new Song
@@ -24,13 +24,14 @@ public void TestDecode()
                 new Lyric
                 {
                     Text = "帰り道は",
+                    StartTime = 17000,
                     TimeTags = new SortedDictionary<TextIndex, int?>
                     {
-                        { new TextIndex(0), 17970 },
-                        { new TextIndex(1), 18370 },
-                        { new TextIndex(2), 18550 },
-                        { new TextIndex(3), 18940 },
-                        { new TextIndex(3, IndexState.End), 19220 },
+                        { new TextIndex(0), 17000 },
+                        { new TextIndex(1), 18000 },
+                        { new TextIndex(2), 19000 },
+                        { new TextIndex(3), 20000 },
+                        { new TextIndex(3, IndexState.End), 21000 },
                     },
                 },
             ],
@@ -49,13 +50,14 @@ public void TestEncode()
                 new Lyric
                 {
                     Text = "帰り道は",
+                    StartTime = 17000,
                     TimeTags = new SortedDictionary<TextIndex, int?>
                     {
-                        { new TextIndex(0), 17970 },
-                        { new TextIndex(1), 18370 },
-                        { new TextIndex(2), 18550 },
-                        { new TextIndex(3), 18940 },
-                        { new TextIndex(3, IndexState.End), 19220 },
+                        { new TextIndex(0), 17000 },
+                        { new TextIndex(1), 18000 },
+                        { new TextIndex(2), 19000 },
+                        { new TextIndex(3), 20000 },
+                        { new TextIndex(3, IndexState.End), 21000 },
                     },
                 },
             ],
@@ -63,7 +65,7 @@ public void TestEncode()
 
         var lrcText = new[]
         {
-            "[00:17.97]帰[00:18.37]り[00:18.55]道[00:18.94]は[00:19.22]",
+            "[00:17.00] <00:00.00>帰<00:01.00>り<00:02.00>道<00:03.00>は<00:04.00>",
         };
 
         checkEncode(song, lrcText);
diff --git a/LrcParser/Parser/Lrc/LrcParser.cs b/LrcParser/Parser/Lrc/LrcParser.cs
index 7378511..c4aa108 100644
--- a/LrcParser/Parser/Lrc/LrcParser.cs
+++ b/LrcParser/Parser/Lrc/LrcParser.cs
@@ -26,14 +26,23 @@ protected override Song PostProcess(List<object> values)
 
         return new Song
         {
-            Lyrics = lyrics.Select(l => new Lyric
-            {
-                Text = l.Text,
-                TimeTags = getTimeTags(l.TimeTags),
-            }).ToList(),
+            Lyrics = lyrics.SelectMany(convertLyric).ToList(),
         };
 
-        static SortedDictionary<TextIndex, int?> getTimeTags(SortedDictionary<TextIndex, int> timeTags, int offsetTime = 0)
+        static IEnumerable<Lyric> convertLyric(LrcLyric lrcLyric)
+        {
+            foreach (var startTime in lrcLyric.StartTimes)
+            {
+                yield return new Lyric
+                {
+                    Text = lrcLyric.Text,
+                    StartTime = startTime,
+                    TimeTags = getTimeTags(lrcLyric.TimeTags, startTime),
+                };
+            }
+        }
+
+        static SortedDictionary<TextIndex, int?> getTimeTags(SortedDictionary<TextIndex, int> timeTags, int offsetTime)
             => new(timeTags.ToDictionary(k => k.Key, v => v.Value + offsetTime as int?));
     }
 
@@ -42,12 +51,14 @@ protected override IEnumerable<object> PreProcess(Song song)
         var lyrics = song.Lyrics;
 
         // first, should return the time-tag first.
+        // todo: implement the algorithm to combine the lyric with different start time but same time-tag.
         foreach (var lyric in lyrics)
         {
             yield return new LrcLyric
             {
                 Text = lyric.Text,
-                TimeTags = getTimeTags(lyric.TimeTags),
+                StartTimes = [lyric.StartTime],
+                TimeTags = getTimeTags(lyric.TimeTags, -lyric.StartTime),
             };
         }