public async Task <IActionResult> Product(string guid)
{
if (string.IsNullOrEmpty(guid))
{
return(BadRequest("Guid is not provided."));
}
var product = await _repo.Product(guid);
if (product != null)
{
return(Ok(product));
}
return(NotFound());
}
public async Task <(TransactionReturnDto transaction, List <ProductReturnDto> unableProducts)> Create(string uGuid, List <ProductBuyDto> wantedProducts)
{
// Create transaction:
var transaction = new Transaction()
{
Guid = Guid.NewGuid().ToString(),
IssueDate = DateTime.Now,
IssuerGuid = uGuid,
Status = TransactionStatus.Pending,
ApprovalDate = null,
CancellationDate = null
};
// Create SoldProducts(Content field of Transaction) & calc total amount:
decimal amount = 0;
var content = new List <SoldProduct>();
// variable to store products which user couln't buy:
var unableToBuyProducts = new List <ProductReturnDto>();
for (int i = 0; i < wantedProducts.Count; i++)
{
// get product with wantedProducts' Guid field:
var product = await _context.Products
.Select(p => new
{
StockCount = p.Count,
SoldProduct = new SoldProduct()
{
Guid = Guid.NewGuid().ToString(),
ProductGuid = p.Guid,
SoldCount = wantedProducts[i].Count,
TransactionGuid = transaction.Guid
}
})
.FirstOrDefaultAsync(
p => p.SoldProduct.ProductGuid == wantedProducts[i].Guid &&
p.StockCount >= wantedProducts[i].Count
);
if (product != null)
{
// If product is found add it to transaction content
// and add price to amount:
var p = await _context.Products
.FirstOrDefaultAsync(p => p.Guid == wantedProducts[i].Guid);
amount += p.Price * product.SoldProduct.SoldCount;
content.Add(product.SoldProduct);
}
else
{
// To return products which user couldn't buy add them to 'unableToBuyProducts' list:
var unableProduct = await _productsRepo
.Product(wantedProducts[i].Guid);
unableToBuyProducts.Add(unableProduct);
}
}
transaction.Content = content;
transaction.Amount = amount;
await _context.Transactions.AddAsync(transaction);
var result = await _context.SaveChangesAsync();
// Return transaction:
if (result > 0)
{
var transactionReturn = await GetTransaction(transaction.Guid);
return(transactionReturn, unableToBuyProducts);
}
return(null, null);
}