신규 요약 기능 추가.

MessageSummarizer/Services/SummarizeService.cs

@@ -8,6 +8,28 @@ namespace MessageSummarizer.Services;
 public class SummarizeService : ISummarizeService
 {
     public async Task<string> SummarizeAsync(string input, CancellationToken cancellationToken = default)
+    {
+        if (string.IsNullOrWhiteSpace(input))
+            return string.Empty;
+
+        // 첫 줄 추출
+        var firstLine = GetFirstLine(input);
+
+        if (firstLine.Contains("핵심 요약", StringComparison.OrdinalIgnoreCase))
+        {
+            return await SummarizeArticleAsync(input, cancellationToken);
+        }
+
+        return await SummarizeMessageAsync(input, cancellationToken);
+    }
+
+    private string GetFirstLine(string input)
+    {
+        using var reader = new StringReader(input);
+        return reader.ReadLine() ?? string.Empty;
+    }
+
+    private async Task<string> SummarizeMessageAsync(string input, CancellationToken cancellationToken = default)
     {
         if (string.IsNullOrWhiteSpace(input))
             return string.Empty;
@@ -38,4 +60,53 @@ public class SummarizeService : ISummarizeService
         var summary = $"{date},{ticker},{stockName},{amount}";
         return summary;
     }
+
+    public async Task<string> SummarizeArticleAsync(string input, CancellationToken cancellationToken = default)
+    {
+        var lines = Regex
+            .Split(input, @"\r\n|\r|\n|\u2028|\u2029")
+            .Select(l => l.Trim())
+            .Where(l => !string.IsNullOrEmpty(l))
+            .ToList();
+
+        var sb = new StringBuilder();
+
+        bool articleHeaderWritten = false;
+
+        foreach (var line in lines)
+        {
+            cancellationToken.ThrowIfCancellationRequested();
+
+            // 1️.숫자만 있는 라인 제거 (1, 2, 3 ...)
+            if (Regex.IsMatch(line, @"^\d+$"))
+                continue;
+
+            // 2️. 타임라인 (MM:SS) 제거
+            if (Regex.IsMatch(line, @"^\d{1,2}:\d{2}$"))
+                continue;
+
+            // 3️. 핵심 요약 헤더
+            if (line == "핵심 요약")
+            {
+                sb.AppendLine("## 핵심 요약");
+                continue;
+            }
+
+            // 4️. 아티클 관련 헤더 통합
+            if (line is "타임라인" or "아티클" or "AI 채팅")
+            {
+                if (!articleHeaderWritten)
+                {
+                    sb.AppendLine("## 아티클");
+                    articleHeaderWritten = true;
+                }
+                continue;
+            }
+
+            // 5️. 그 외 모든 텍스트는 bullet 처리
+            sb.AppendLine($"* {line}");
+        }
+
+        return sb.ToString().TrimEnd();
+    }
 }