/// <summary>
/// Adds the product to the wishlist of the specified user.
/// </summary>
/// <param name="userId">The id of the user to add to.</param>
/// <param name="productId">The id of the product to add.</param>
public async Task AddToWishlistAsync(int userId, int productId)
{
// Checks the product is not in the user's wishlist already:
if (await _dbContext.UserWishlistProducts.AnyAsync(uwp => uwp.UserId == userId && uwp.ProductId == productId) == false)
{
// Adds to the database:
UserWishlistProduct wishlistProduct = new UserWishlistProduct()
{
UserId = userId,
ProductId = productId
};
_dbContext.UserWishlistProducts.Add(wishlistProduct);
await _dbContext.SaveChangesAsync();
// Adds to the cache:
wishlistProduct = await _dbContext.UserWishlistProducts
.Include(uwp => uwp.Product).Include(uwp => uwp.Product.Sale)
.FirstOrDefaultAsync(uwp => uwp.UserId == userId && uwp.ProductId == productId);
User user = await this.GetByIdAsync(userId);
user.Wishlist.Add(wishlistProduct);
_userCache.Set(user);
}
}
/// <summary>
/// Removes the product from the wishlist of the specified user.
/// </summary>
/// <param name="userId">The id of the user to remove from.</param>
/// <param name="productId">The id of the product to remove.</param>
public async Task RemoveFromWishlistAsync(int userId, int productId)
{
User user = await this.GetByIdAsync(userId);
// Checks the product is in the user's wishlist:
UserWishlistProduct wishlistProduct = user.Wishlist.FirstOrDefault(uwp => uwp.ProductId == productId);
if (wishlistProduct != null)
{
// Updates the database:
_dbContext.UserWishlistProducts.Remove(wishlistProduct);
await _dbContext.SaveChangesAsync();
// Updates the cache:
user.Wishlist.Remove(wishlistProduct);
_userCache.Set(user);
}
}