using System.IO;
using System.Text;

namespace CloudMosaic.Frontend
{
    public static class Utilities
    {
        public static void CopyStream(Stream input, Stream output)
        {
            byte[] buffer = new byte[8 * 1024];
            int len;
            while ((len = input.Read(buffer, 0, buffer.Length)) > 0)
            {
                output.Write(buffer, 0, len);
            }
        }

        public static string MakeSafeName(string displayName, int maxSize)
        {
            var builder = new StringBuilder();
            foreach (char c in displayName)
            {
                if (char.IsLetterOrDigit(c))
                {
                    builder.Append(c);
                }
                else
                {
                    builder.Append('-');
                }
            }

            var name = builder.ToString();

            if (maxSize < name.Length)
            {
                name = name.Substring(0, maxSize);
            }

            return name;
        }
    }
}