using System.Collections.Generic;
using System.IO;
using System.Linq;
using AngleSharp;
using AngleSharp.Html.Parser;

namespace Rac.Tools
{
    internal static class InternalUtility
    {
        public static byte[] ToBytes(this Stream stream)
        {
            using var ms = new MemoryStream();
            stream.CopyTo(ms);
            return ms.ToArray();
        }

        public static bool In<T>(this T value, params T[] checkIn)
        {
            return checkIn.Contains(value);
        }

        public static string LoadHtml(byte[] body, out string charset)
        {
            using var stream = new MemoryStream(body);
            var htmlDocument = new HtmlParser().ParseDocument(stream);
            charset = htmlDocument.CharacterSet;
            return htmlDocument.ToHtml();
        }

        public static void AddRange<T>(this HashSet<T> hashSet, IEnumerable<T> toAdd)
        {
            foreach (var item in toAdd)
            {
                hashSet.Add(item);
            }
        }
    }
}