/// <summary>
/// Adds a title to a user's collection and reduces their points appropriately.
/// </summary>
/// <param name="userId"></param>
/// <param name="storeItemId"></param>
/// <returns></returns>
public async Task <ServiceResult> BuyTitleAsync(string userId, int storeItemId)
{
var title = await db.StoreItems.FindAsync(storeItemId);
var user = db.Users.Find(userId);
// get any sales that this item is under
int pointsCost = await GetAdjustedSalePrice(storeItemId, title.PointPrice);
bool success = false;
List <string> errors = new List <string>();
if (user.CurrentPoints >= pointsCost)
{
try
{
UserTitle userTitle = new UserTitle()
{
UserId = userId,
StoreItemId = storeItemId,
DateObtained = DateTime.Now
};
// if the user does not own the title, let them purchase it
bool doesUserAlreadyHaveTitle = await db.UserTitles.AnyAsync(a => a.StoreItemId == storeItemId && a.UserId == userId);
if (!doesUserAlreadyHaveTitle)
{
db.UserTitles.Add(userTitle);
LogStoreTransaction(userId, storeItemId, 1, pointsCost);
user.CurrentPoints -= pointsCost;
success = (await db.SaveChangesAsync()) > 0;
}
else
{
errors.Add(ErrorMessages.TitleAlreadyObtained);
ValidationDictionary.AddError(Guid.NewGuid().ToString(), ErrorMessages.TitleAlreadyObtained);
}
}
catch (DbUpdateException ex)
{
Log.Error("StoreService.BuyGiftAsync", ex, new { userId, storeItemId });
errors.Add(ErrorMessages.TitleAlreadyObtained);
}
if (success)
{
await AwardAchievedMilestonesForUserAsync(userId, (int)MilestoneTypeValues.TitlesPurchased);
}
}
else
{
string error = String.Format(ErrorMessages.UserDoesNotHaveEnoughPointsToPurchase, 1, title.Name);
errors.Add(error);
ValidationDictionary.AddError(Guid.NewGuid().ToString(), error);
}
return(success ? ServiceResult.Success : ServiceResult.Failed(errors.ToArray()));
}
/// <summary>
/// Adds a gift to a user's collection and reduces their points appropriately.
/// </summary>
/// <param name="userId"></param>
/// <param name="storeItemId"></param>
/// <param name="buyCount"></param>
/// <returns></returns>
public async Task <ServiceResult> BuyGiftAsync(string userId, int storeItemId, int buyCount)
{
Debug.Assert(!String.IsNullOrEmpty(userId));
Debug.Assert(storeItemId > 0);
Debug.Assert(buyCount > 0);
// check price of item and see if the user has enough points to buy the item with the count
var gift = await db.StoreItems.FindAsync(storeItemId);
var user = db.Users.Find(userId);
// get any sales that this item is under
int pointsCost = await GetAdjustedSalePrice(storeItemId, gift.PointPrice);
bool success = false;
string failMessage = String.Empty;
if (user.CurrentPoints >= pointsCost * buyCount)
{
try
{
// check if user already has an item of this type
var inventoryItem = await(from inventory in db.InventoryItems
where inventory.StoreItemId == storeItemId
where inventory.ApplicationUserId == userId
select inventory).FirstOrDefaultAsync();
// if they do, increase the count of their item based on buyCount
if (inventoryItem != null)
{
inventoryItem.ItemCount += buyCount;
}
// if they don't, create a new item and add it to their inventory
else
{
InventoryItem item = new InventoryItem()
{
ApplicationUserId = userId,
StoreItemId = storeItemId,
ItemCount = buyCount
};
db.InventoryItems.Add(item);
}
LogStoreTransaction(userId, storeItemId, buyCount, pointsCost);
user.CurrentPoints -= pointsCost * buyCount;
success = (await db.SaveChangesAsync()) > 0;
}
catch (DbUpdateException ex)
{
Log.Error("StoreService.BuyGiftAsync", ex, new { userId, storeItemId, buyCount });
ValidationDictionary.AddError(Guid.NewGuid().ToString(), ErrorMessages.GiftPurchaseFailed);
}
if (success)
{
await AwardAchievedMilestonesForUserAsync(userId, (int)MilestoneTypeValues.GiftsPurchased);
}
else
{
failMessage = ErrorMessages.GiftPurchaseFailed;
}
}
else
{
failMessage = String.Format(ErrorMessages.UserDoesNotHaveEnoughPointsToPurchase, buyCount, gift.Name);
ValidationDictionary.AddError(Guid.NewGuid().ToString(), failMessage);
}
return(success ? ServiceResult.Success : ServiceResult.Failed(failMessage));
}