public async Task MoveAuction(int auctionId, int newCategoryId, string movingUserId, IValidationErrorNotifier errors)
{
var auction = await this.GetById(auctionId);
if(!await CanBeMoved(auction, movingUserId))
{
errors.AddError(Lang.Show.CannotMove);
return;
}
auction.CategoryId = newCategoryId;
await mContext.SaveChangesAsync();
}
public async Task Buyout(int auctionId, string buyerId, IValidationErrorNotifier errors)
{
var auction = await GetById(auctionId);
if(!auction.IsBuyoutEnabled)
{
errors.AddError(Lang.Buy.BuyoutNotEnabled);
return;
}
if(!CanBeBought(auction, buyerId, errors))
return;
auction.Offers.Add(new BuyOffer
{
UserId = buyerId,
Date = DateTime.Now,
Amount = auction.BuyoutPrice.Amount,
});
await mContext.SaveChangesAsync();
await mUserNotifier.NotifyAuctionSold(auction.Seller, auction);
await mUserNotifier.NotifyAuctionWon(auction.Buyer, auction);
}
private bool CanBeBought(Auction auction, string buyerId, IValidationErrorNotifier errors)
{
if(auction.Status != AuctionStatus.Active)
{
errors.AddError(Lang.Buy.AuctionIsInactive);
return false;
}
if(auction.SellerId == buyerId)
{
errors.AddError(Lang.Buy.CannotBuyOwnAuctions);
return false;
}
return true;
}
public async Task Bid(int auctionId, string buyerId, decimal bidAmount, IValidationErrorNotifier errors)
{
var auction = await GetById(auctionId);
if(!auction.IsBiddingEnabled)
{
errors.AddError(Lang.Buy.BiddingNotEnabled);
return;
}
if(!CanBeBought(auction, buyerId, errors))
return;
if(bidAmount < auction.MinBidAllowed)
{
errors.AddError(String.Format(Lang.Buy.TooLowBid, new Money(auction.MinBidAllowed, auction.MinimumPrice.Currency)));
return;
}
var previouslyBestOffer = auction.BestOffer;
var userOffer = new BuyOffer
{
UserId = buyerId,
Date = DateTime.Now,
Amount = bidAmount,
};
auction.Offers.Add(userOffer);
await mContext.SaveChangesAsync();
await mUserNotifier.NotifyOfferAdded(userOffer.User, userOffer, auction);
if(previouslyBestOffer != null)
{
await mUserNotifier.NotifyOutbid(previouslyBestOffer.User, auction);
}
}
private async Task<bool> CanBeRemoved(Auction auction, string userId, IValidationErrorNotifier errors)
{
if(auction.SellerId != userId && !await mUserService.IsUserInRole(userId, "Admin"))
{
errors.AddError(Lang.Delete.WrongUser);
return false;
}
if(auction.Offers.Any())
{
errors.AddError(Lang.Delete.BuyOfferHasBeenMade);
return false;
}
if(auction.Status != AuctionStatus.Active)
{
errors.AddError(Lang.Delete.AuctionIsInactive);
return false;
}
return true;
}
