// Copyright (c) .NET Foundation. All rights reserved.
// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.

using System;
using System.Buffers;

namespace Microsoft.AspNetCore.Internal
{
    internal static class TextMessageParser
    {
        public static bool TryParseMessage(ref ReadOnlySequence<byte> buffer, out ReadOnlySequence<byte> payload)
        {
            var position = buffer.PositionOf(TextMessageFormatter.RecordSeparator);
            if (position == null)
            {
                payload = default;
                return false;
            }

            payload = buffer.Slice(0, position.Value);

            // Skip record separator
            buffer = buffer.Slice(buffer.GetPosition(1, position.Value));

            return true;
        }
    }
}