ANTOOZA-BACKEND/Application/Features/Api/Crew/ConsentSession/Handler.cs

using Application.Abstractions.Data;
using Application.Abstractions.Messaging;
using SharedKernel.Results;
using Microsoft.EntityFrameworkCore;

namespace Application.Features.Api.Crew.ConsentSession;

internal sealed class Handler(IAppDbContext db) : ICommandHandler<Command, Result<Response>>
{
    public async Task<Result<Response>> Handle(Command request, CancellationToken ct)
    {
        var consent = await db.CrewSessionConsent
            .FirstOrDefaultAsync(c => c.CrewSessionID == request.CrewSessionID && c.CrewMemberID == request.CrewMemberID, ct);

        if (consent is null)
        {
            return Result.Failure<Response>(Error.NotFound("Crew.ConsentNotFound", "동의 정보를 찾을 수 없습니다."));
        }

        if (consent.IsConsented)
        {
            return Result.Failure<Response>(Error.Conflict("Crew.AlreadyConsented", "이미 동의했습니다."));
        }

        consent.Consent();

        // 전원 동의 확인
        var allConsented = await db.CrewSessionConsent
            .Where(c => c.CrewSessionID == request.CrewSessionID)
            .AllAsync(c => c.IsConsented || c.CrewMemberID == request.CrewMemberID, ct);

        if (allConsented)
        {
            var session = await db.CrewSession.FindAsync([request.CrewSessionID], ct);
            session?.Activate();
        }

        await db.SaveChangesAsync(ct);
        return Result.Success(new Response(allConsented));
    }
}