VsOfflineInstallerHelper/FileLikeArgsProcessing.cs at master · nobyArdor/VsOfflineInstallerHelper · GitHub

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namespace VsCodeInstallerHelper;
internal static class FileLikeArgsProcessing
{
    static string [] PathTemplates() =>
    [
        $"{Path.DirectorySeparatorChar}",
        $"{Path.AltDirectorySeparatorChar}",
        $".{Path.DirectorySeparatorChar}",
        $".{Path.AltDirectorySeparatorChar}",
        $"..{Path.DirectorySeparatorChar}",
        $"..{Path.AltDirectorySeparatorChar}"
    ];

    internal static IEnumerable<string> UpdateFileArgs(IReadOnlyList<string>? executeParams, string? workPath, bool resolveFullPath,
        bool checkFileExists)
    {
        if (executeParams is null)
            yield break;

        if (!resolveFullPath && !checkFileExists)
        {
            foreach (var executeParam in executeParams)
                yield return executeParam;

            yield break;
        }
        var pathTemplates = PathTemplates();
        foreach (var executeParam in executeParams)
        {
            var param = executeParam.Trim();
            if (pathTemplates.Any(template => param.StartsWith(template)))
                param = UpdateFileSystemPath(param, workPath, resolveFullPath, checkFileExists);

            yield return param;
        }
    }

    internal static string UpdateFileSystemPath(string fileSystemPath, string? workPath, bool resolveFullPath, bool checkFileExists)
    {
        if (!resolveFullPath && !checkFileExists)
            return fileSystemPath;
        var updatedPath = fileSystemPath;
        if (resolveFullPath)
        {
            if (Path.IsPathFullyQualified(fileSystemPath))
                return fileSystemPath;

            updatedPath = workPath is null
                ? Path.GetFullPath(fileSystemPath)
                : Path.GetFullPath(Path.Combine(workPath, fileSystemPath));
        }

        if (!checkFileExists || Path.Exists(updatedPath))
            return updatedPath;

        Error($"The specified file '{updatedPath}' does not exist.");
        throw new FileNotFoundException($"The specified file '{updatedPath}' does not exist.");
    }
}