37 lines
1.3 KiB
C#
37 lines
1.3 KiB
C#
using MediatR;
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using Knot.Contracts.Conversations.Domain;
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using Knot.Shared.Kernel;
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using Knot.Contracts.Conversations.Application.Abstractions;
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namespace Knot.Modules.Conversations.Application.Messages.Read;
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public sealed record ReadMessagesCommand(Guid ChatId, Guid UserId, Guid LastReadMessageId, long LastReadSequenceId) : ICommand;
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public sealed class ReadMessagesCommandHandler : ICommandHandler<ReadMessagesCommand>
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{
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private readonly IChatRepository _chatRepository;
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private readonly IChatsUnitOfWork _unitOfWork;
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public ReadMessagesCommandHandler(IChatRepository chatRepository, IChatsUnitOfWork unitOfWork)
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{
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_chatRepository = chatRepository;
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_unitOfWork = unitOfWork;
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}
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public async Task<Result> Handle(ReadMessagesCommand request, CancellationToken cancellationToken)
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{
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var chat = await _chatRepository.GetByIdAsync(request.ChatId, cancellationToken);
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if (chat == null) return Result.Failure(ChatErrors.NotFound);
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var member = chat.Members.FirstOrDefault(m => m.UserId == request.UserId);
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if (member == null) return Result.Failure(ChatErrors.NotMember);
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member.UpdateReadCursor(request.LastReadMessageId, request.LastReadSequenceId);
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await _unitOfWork.SaveChangesAsync(cancellationToken);
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return Result.Success();
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}
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}
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