using System;

namespace FileCompression.Utils;

public static class ArchiveUtils
{
    public static string EntryFromPath(ReadOnlySpan<char> path, bool appendPathSeparator = false)
    {
        // Remove leading separators.
        int nonSlash = path.IndexOfAnyExcept('/');
        if (nonSlash < 0)
        {
            nonSlash = path.Length;
        }
        path = path.Slice(nonSlash);

        // Append a separator if necessary.
        return (path.IsEmpty, appendPathSeparator) switch
        {
            (false, false) => path.ToString(),
            (false, true) => string.Concat(path, "/"),
            (true, false) => string.Empty,
            (true, true) => "/",
        };
    }
}