76 lines
3.5 KiB
C#
76 lines
3.5 KiB
C#
using System.Text.RegularExpressions;
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namespace MatrixImageEditor;
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internal static partial class ImagePathRules
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{
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public static string ValidateExistingImage(string imagePath)
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{
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var fullPath = ValidateImageNameAndDirectory(imagePath);
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if (!File.Exists(fullPath)) throw new FileNotFoundException("镜像文件不存在", fullPath);
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if (Directory.Exists(fullPath + ".sha256")) throw new IOException("同名 SHA-256 摘要路径被文件夹占用");
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return fullPath;
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}
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public static string ValidateNewDestination(string sourcePath, string destinationPath)
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{
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var source = ValidateExistingImage(sourcePath);
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var destination = ValidateImageNameAndDirectory(destinationPath);
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if (destination.Equals(source, StringComparison.OrdinalIgnoreCase)) throw new ArgumentException("另存为必须使用与原镜像不同的文件名");
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if (File.Exists(destination) || Directory.Exists(destination)) throw new IOException("目标镜像已经存在，请使用新的文件名");
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var sidecar = destination + ".sha256";
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if (File.Exists(sidecar) || Directory.Exists(sidecar)) throw new IOException("目标镜像的同名 SHA-256 摘要已经存在，请使用新的文件名");
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return destination;
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}
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public static string? CleanupNewDestination(string destinationPath)
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{
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List<string>? failures = null;
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foreach (var target in new[] { destinationPath + ".sha256", destinationPath })
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{
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try
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{
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if (File.Exists(target)) File.Delete(target);
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}
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catch (Exception exception)
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{
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failures ??= new List<string>();
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failures.Add($"{Path.GetFileName(target)}：{exception.Message}");
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}
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}
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return failures is null ? null : string.Join("；", failures);
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}
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private static string ValidateImageNameAndDirectory(string imagePath)
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{
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if (string.IsNullOrWhiteSpace(imagePath)) throw new ArgumentException("镜像路径不能为空");
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string fullPath;
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try
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{
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fullPath = Path.GetFullPath(imagePath);
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}
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catch (Exception exception) when (exception is ArgumentException or NotSupportedException or PathTooLongException)
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{
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throw new ArgumentException("镜像路径格式无效", exception);
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}
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var fileName = Path.GetFileName(fullPath);
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if (string.IsNullOrWhiteSpace(fileName)) throw new ArgumentException("镜像文件名不能为空");
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if (fileName.IndexOfAny(Path.GetInvalidFileNameChars()) >= 0 || fileName != fileName.TrimEnd(' ', '.'))
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{
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throw new ArgumentException("镜像文件名包含 Windows 不允许的字符，或以空格、句点结尾");
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}
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if (!Path.GetExtension(fileName).Equals(".img", StringComparison.OrdinalIgnoreCase)) throw new ArgumentException("镜像文件名必须以 .img 结尾");
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if (ReservedWindowsName().IsMatch(Path.GetFileNameWithoutExtension(fileName))) throw new ArgumentException("镜像文件名使用了 Windows 保留名称，请更换名称");
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var directory = Path.GetDirectoryName(fullPath);
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if (string.IsNullOrEmpty(directory) || !Directory.Exists(directory)) throw new DirectoryNotFoundException("镜像目标文件夹不存在");
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return fullPath;
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}
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[GeneratedRegex("^(CON|PRN|AUX|NUL|COM[1-9]|LPT[1-9])(?:\\..*)?$", RegexOptions.IgnoreCase | RegexOptions.CultureInvariant)]
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private static partial Regex ReservedWindowsName();
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}
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