ANTOOZA-BACKEND/Application/Features/Admin/Store/GameCatalog/Create/Handler.cs

using Application.Abstractions.Data;
using Application.Abstractions.Messaging;
using Domain.Entities.Store;
using Microsoft.EntityFrameworkCore;
using SharedKernel.Results;

namespace Application.Features.Admin.Store.GameCatalog.Create;

internal sealed class Handler(IAppDbContext db) : ICommandHandler<Command, Result>
{
    public async Task<Result> Handle(Command request, CancellationToken ct)
    {
        if (string.IsNullOrWhiteSpace(request.ProductID))
        {
            return Result.Failure(Error.Problem("GameCatalog.ProductIDRequired", "SKU(상품 ID)는 필수입니다."));
        }

        if (request.Price <= 0)
        {
            return Result.Failure(Error.Problem("GameCatalog.PriceInvalid", "정가는 1 이상이어야 합니다."));
        }

        if (!await db.Game.AnyAsync(c => c.ID == request.GameID, ct))
        {
            return Result.Failure(Error.NotFound("Game.NotFound", "게임을 찾을 수 없습니다."));
        }

        var productID = request.ProductID.Trim();

        if (await db.GameProductCatalog.AnyAsync(c => c.GameID == request.GameID && c.ProductID == productID, ct))
        {
            return Result.Failure(Error.Conflict("GameCatalog.Duplicate", "이미 등록된 SKU 입니다."));
        }

        db.GameProductCatalog.Add(GameProductCatalog.Create(request.GameID, productID, request.Price));
        await db.SaveChangesAsync(ct);

        return Result.Success();
    }
}