From 563121c5f55b3ae207c70d5310e11fdcfc56a858 Mon Sep 17 00:00:00 2001
From: Pavel Zhur <completely.real@gmail.com>
Date: Wed, 9 Oct 2024 12:09:58 +0300
Subject: [PATCH] multiple parantheses support

---
 .../ChordParserTests.cs                       |  2 ++
 .../Models/Enums/ChordParseError.cs           |  1 +
 .../Parsers/ChordParser.cs                    | 26 +++++++++----------
 3 files changed, 15 insertions(+), 14 deletions(-)

diff --git a/HarmonyDB.Theory/HarmonyDB.Theory.Chords.Tests/ChordParserTests.cs b/HarmonyDB.Theory/HarmonyDB.Theory.Chords.Tests/ChordParserTests.cs
index ed09f822..ae478ea4 100644
--- a/HarmonyDB.Theory/HarmonyDB.Theory.Chords.Tests/ChordParserTests.cs
+++ b/HarmonyDB.Theory/HarmonyDB.Theory.Chords.Tests/ChordParserTests.cs
@@ -34,6 +34,8 @@ public void ParseChordType(string input, (List<(ChordTypeToken token, bool fromP
         ["ab()()", (List<(string, bool)>)[("ab()()", false)]],
         ["ab(cd)", (List<(string, bool)>)[("ab", false), ("cd", true)]],
         ["ab(c,d)", (List<(string, bool)>)[("ab", false), ("c", true), ("d", true)]],
+        ["ab(c,d)(e)f(g)h", (List<(string, bool)>)[("ab", false), ("c", true), ("d", true), ("e", true), ("f", false), ("g", true), ("h", false)]],
+        ["ab(c,d,)", (List<(string, bool)>)[("ab", false), ("c", true), ("d", true)]],
         ["ab(c,d,)", (List<(string, bool)>)[("ab", false), ("c", true), ("d", true)]],
         ["ab(c,,d)", (List<(string, bool)>)[("ab", false), ("c", true), ("d", true)]],
         ["(c,,d)", (List<(string, bool)>)[("c", true), ("d", true)]],
diff --git a/HarmonyDB.Theory/HarmonyDB.Theory.Chords/Models/Enums/ChordParseError.cs b/HarmonyDB.Theory/HarmonyDB.Theory.Chords/Models/Enums/ChordParseError.cs
index 4fecd4fe..b7bd2e3e 100644
--- a/HarmonyDB.Theory/HarmonyDB.Theory.Chords/Models/Enums/ChordParseError.cs
+++ b/HarmonyDB.Theory/HarmonyDB.Theory.Chords/Models/Enums/ChordParseError.cs
@@ -14,4 +14,5 @@ public enum ChordParseError
     DuplicateAdditions,
     EachExtensionTypeExpectedUnique,
     MaxOneMajExtensionExpected,
+    EmptyBrackets,
 }
\ No newline at end of file
diff --git a/HarmonyDB.Theory/HarmonyDB.Theory.Chords/Parsers/ChordParser.cs b/HarmonyDB.Theory/HarmonyDB.Theory.Chords/Parsers/ChordParser.cs
index 65059b93..77b0355b 100644
--- a/HarmonyDB.Theory/HarmonyDB.Theory.Chords/Parsers/ChordParser.cs
+++ b/HarmonyDB.Theory/HarmonyDB.Theory.Chords/Parsers/ChordParser.cs
@@ -242,24 +242,22 @@ internal static (List<(ChordTypeToken token, bool fromParentheses, MatchAmbiguit
 
     internal static (List<(string fragment, bool fromParentheses)>? fragments, ChordParseError? error) TryUnwrapParentheses(string input, ChordTypeParsingOptions options)
     {
-        var match = Regex.Match(input, "^([^\\(\\)]*)\\(([^\\(\\)]+)\\)([^\\(\\)]*)$");
-
-        List<(string input, bool fromParentheses)> inputs;
-        if (!match.Success)
+        var match1 = Regex.Match(input, @"^((?<notin>[^\(\)]*)|\((?<in>[^\(\)]+)\))*$");
+        if (!match1.Success)
         {
-            inputs = [(input, false)];
-        }
-        else
-        {
-            inputs = match.Groups[2].Value.Split(',').Select(x => (x, true))
-                .Prepend((match.Groups[1].Value, false))
-                .Append((match.Groups[3].Value, false))
-                .ToList();
+            return ([(input, false)], null);
         }
 
-        inputs = inputs.Where(x => x.input != string.Empty).ToList();
+        var inputs = match1.Groups["in"].Captures.Select(c => (c, fromParentheses: true))
+            .Concat(match1.Groups["notin"].Captures.Select(c => (c, fromParentheses: false)))
+            .Where(c => c.c.Length > 0)
+            .OrderBy(c => c.c.Index)
+            .Select(c => (c.c.Value, c.fromParentheses))
+            .SelectMany(c => !c.fromParentheses ? c.Once() : c.Value.Split(',').Select(x => (Value: x, fromParentheses: true)))
+            .Where(c => c.Value != string.Empty)
+            .ToList();
 
-        var trimmed = inputs.Select(x => x with { input = x.input.Trim() }).Where(x => x.input != string.Empty).ToList();
+        var trimmed = inputs.Select(x => x with { Value = x.Value.Trim() }).Where(x => x.Value != string.Empty).ToList();
         if (!options.TrimWhitespaceFragments && (trimmed.Count != inputs.Count || trimmed.Zip(inputs).Any(x => x.First != x.Second)))
         {
             return new(null, ChordParseError.WhitespaceFragments);