public async Task <ActionResult> ChangeOwnership([FromRoute] long id, [FromBody] OwnershipObject ownershipObject)
{
var stock = await _context.Stocks.Where(x => x.Id == id)
.Include(s => s.ShareHolders)
.Where(s => s.ShareHolders.Any(q => q.ShareholderId == ownershipObject.Seller)).FirstOrDefaultAsync();
if (stock == null)
{
_logger.LogError("Failed to find the Seller");
return(NotFound("Failed to find the Seller"));
}
var actionResult = SetSellerAmount(ownershipObject, stock);
if (actionResult != null)
{
return(actionResult);
}
SetBuyerAmount(ownershipObject, stock);
_logger.LogInformation("Changed ownership of {Amount} shares from {Seller} to {Buyer}", ownershipObject.Amount, ownershipObject.Seller, ownershipObject.Buyer);
await _context.SaveChangesAsync();
return(Ok());
}
private static void SetBuyerAmount(OwnershipObject ownershipObject, Stock stock)
{
var shareHolderBuyer = stock.ShareHolders.FirstOrDefault(sh => sh.ShareholderId == ownershipObject.Buyer);
if (shareHolderBuyer == null)
{
shareHolderBuyer = new Shareholder {
ShareholderId = ownershipObject.Buyer, Amount = ownershipObject.Amount
};
stock.ShareHolders.Add(shareHolderBuyer);
}
else
{
shareHolderBuyer.Amount += ownershipObject.Amount;
}
}
private ActionResult SetSellerAmount(OwnershipObject ownershipObject, Stock stock)
{
var shareholderSeller = stock.ShareHolders.FirstOrDefault(sh => sh.ShareholderId == ownershipObject.Seller);
if (shareholderSeller == null)
{
_logger.LogError("Failed to find the Seller");
{
return(NotFound("Failed to find the Seller"));
}
}
_logger.LogInformation(@"shareholder Seller Amount {shareholderSellerAmount} request amount {requestAmount}", shareholderSeller.Amount, ownershipObject.Amount);
shareholderSeller.Amount -= ownershipObject.Amount;
if (shareholderSeller.Amount >= 0)
{
return(null);
}
_logger.LogError("Seller cannot go below 0 shares");
return(BadRequest("Seller cannot go below 0 shares"));
}