// (c) Copyright Ascensio System SIA 2010-2022
//
// This program is a free software product.
// You can redistribute it and/or modify it under the terms
// of the GNU Affero General Public License (AGPL) version 3 as published by the Free Software
// Foundation. In accordance with Section 7(a) of the GNU AGPL its Section 15 shall be amended
// to the effect that Ascensio System SIA expressly excludes the warranty of non-infringement of
// any third-party rights.
//
// This program is distributed WITHOUT ANY WARRANTY, without even the implied warranty
// of MERCHANTABILITY or FITNESS FOR A PARTICULAR  PURPOSE. For details, see
// the GNU AGPL at: http://www.gnu.org/licenses/agpl-3.0.html
//
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//
// The  interactive user interfaces in modified source and object code versions of the Program must
// display Appropriate Legal Notices, as required under Section 5 of the GNU AGPL version 3.
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// distributing the program. Pursuant to Section 7(e) we decline to grant you any rights under
// trademark law for use of our trademarks.
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// All the Product's GUI elements, including illustrations and icon sets, as well as technical writing
// content are licensed under the terms of the Creative Commons Attribution-ShareAlike 4.0
// International. See the License terms at http://creativecommons.org/licenses/by-sa/4.0/legalcode

namespace ASC.Notify.Engine;

class SingleRecipientInterceptor : ISendInterceptor
{
    private const string Prefix = "__singlerecipientinterceptor";
    private readonly List<IRecipient> _sendedTo = new List<IRecipient>(10);

    public string Name { get; private set; }
    public InterceptorPlace PreventPlace => InterceptorPlace.GroupSend | InterceptorPlace.DirectSend;
    public InterceptorLifetime Lifetime => InterceptorLifetime.Call;


    internal SingleRecipientInterceptor(string name)
    {
        if (string.IsNullOrEmpty(name))
        {
            throw new ArgumentException(nameof(name));
        }

        Name = name;
    }

    public bool PreventSend(NotifyRequest request, InterceptorPlace place, IServiceScope serviceScope)
    {
        var sendTo = request.Recipient;
        if (!_sendedTo.Exists(rec => Equals(rec, sendTo)))
        {
            _sendedTo.Add(sendTo);

            return false;
        }

        return true;
    }
}