HatenaBlog Content copy to draft_entries, if draft title is same as customPath

HatenaBlogContentToDraft.cs

var draftBasePath = @"{YOUR_GITHUB_PATH}/blogdraft_entries\";
var basePath = @"{YOUR_GITHUB_PATH}/entries/{YOUR_ACCOUNT}.hatenablog.com/entry/";
var targetMonths = new[] {
 // 持ってきたい日付を並べる
 "2025/03"
};
var titlePattern = new Regex("201[2,3]/[0-9]{2}/[0-9]{2}/[0-9]{6}", RegexOptions.Compiled);

var drafts = Directory.EnumerateFiles(draftBasePath, "*.md");
foreach (var draft in drafts)
{
	var title = File.ReadLines(draft)
		.Where(x => x.StartsWith("Title:"))
		.Select(x => x.Split(":")[1].Trim())
		.Single();
		
	if (!titlePattern.IsMatch(title))
		continue;
		
	var draftContent = File.ReadAllLines(draft);
	var draftEditUrlLine = draftContent.Where(x => x.StartsWith("EditURL: ")).Single();
	var draftPreviewURL = draftContent.Where(x => x.StartsWith("PreviewURL: ")).Single();

	foreach (var targetMonth in targetMonths)
	{
		var searchBase = Path.Combine(basePath, targetMonth);
		var files = Directory.EnumerateFiles(searchBase, "*.md", SearchOption.AllDirectories);
		foreach (var file in files)
		{
			// _2.md は除外
			if (Path.GetFileNameWithoutExtension(file).EndsWith("_2"))
				continue;
				
			var lines = File.ReadAllLines(file);
			if (lines.Any(x => x.Contains($"CustomPath: {title}")))
			{
				var sectionLines = GetHeaderSectionLines(lines);
				var titleLine = sectionLines.Where(x => x.StartsWith("Title: ")).Single();
				var categoryLine = GetCategories(sectionLines);
				var dateLine = sectionLines.Where(x => x.StartsWith("Date: ")).Single();
				var urlLine = sectionLines.Where(x => x.StartsWith("URL: ")).Single();
				var customPathLine = sectionLines.Where(x => x.StartsWith("CustomPath: ")).Single();

				var contentBuilder = new StringBuilder();
				// ヘッダー
				contentBuilder.AppendLine("---");
				contentBuilder.AppendLine(titleLine);
				contentBuilder.AppendLine(categoryLine);
				contentBuilder.AppendLine(dateLine);
				contentBuilder.AppendLine(draftEditUrlLine);
				contentBuilder.AppendLine(draftPreviewURL);
				contentBuilder.AppendLine(customPathLine);
				contentBuilder.AppendLine("---");
				
				// コンテンツ
				var contentsLines = lines.Skip(sectionLines.Length);
				contentBuilder.AppendLine();
				contentBuilder.AppendLine("<!--");
				contentBuilder.AppendLine($"  {dateLine}");
				contentBuilder.AppendLine($"  {urlLine}");
				contentBuilder.AppendLine("-->");
				foreach (var line in contentsLines)
				{
					contentBuilder.AppendLine(line);
				}
				var content = contentBuilder.ToString();
				
				// 書き込み
				if (content != "")
				{
					File.WriteAllText(draft, content);
				}
			}
		}
	}
}

static string[] GetHeaderSectionLines(string[] lines)
{
	int number = 0;
	var inSection = false;
	foreach (var line in lines)
	{
		// enter
		if (!inSection && line == "---")
		{
			inSection = true;
			number++;
			continue;
		}
		// exit
		if (inSection && line == "---")
		{
			inSection = false;
			number++;
			break;
		}
		// inside
		if (inSection && line != "---")
		{
			number++;
			continue;
		}
	}

	return lines.Take(number).ToArray();
}

static string GetCategories(string[] lines)
{
	var categoryLines = new StringBuilder();
	var inCategory = false;
	foreach (var line in lines)
	{
		if (line.StartsWith("Category:"))
		{
			inCategory = true;
			categoryLines.AppendLine(line);
			continue;
		}
		if (inCategory)
		{
			if (!line.StartsWith("- "))
			{
				inCategory = false;
				break;
			}

			categoryLines.AppendLine(line);
			continue;
		}
	}

	// 最終行の空行はトリム除去
	return categoryLines.ToString().TrimEnd();
}