def reserveInventoryIfAvailable(self, customerId, barcode, quantity):
dbConnect = DbConnect(BarcodeDAO.getDbDir())
connector = dbConnect.getConnection()
# the customer should order the exact amount. For example if there exists 1 item in the
# back room and the customer ordered 2 items, then the whole transaction is rejected.
# if returning false, the available quantity
numAvailableItem = self.__numItemsAvailable(connector, barcode)
if numAvailableItem < quantity:
return (False, numAvailableItem)
barcodeDAO = BarcodeDAO(connector)
barcodePriKey = barcodeDAO.getPriKeys("Barcode", barcode)[0]
inventoryDAO = InventoryDAO(connector)
inventoryEntries = inventoryDAO.selectEntries("BarcodeDetailsFk", barcodePriKey)
virtualCartDAO = VirtualCartDAO(connector)
newVirtualCartRowId = virtualCartDAO.createAnEntry( (customerId, barcodePriKey, quantity, 0) )
reservedInventoryLoc = list()
reserveCount = 0
for inventoryEntry in inventoryEntries:
if reserveCount == quantity:
break
if inventoryEntry[6] != 0:
continue
inventoryDAO.update(inventoryEntry[0], "CheckoutFlag", 1)
# [inventoryDetailsId, barcodeDetailsFk, X_index, Y_index, X_encoder, Y_encoder, checkoutFlag]
entry = inventoryDAO.selectAnEntry(inventoryEntry[0])
reservedInventoryLoc.append(entry[0:1]+entry[2:6]) # omit barcodeDetailsFk and checkoutFlag
reserveCount += 1
return (True, reservedInventoryLoc, newVirtualCartRowId)
def getLocationBoxAbove(self, inventoryDetailsId):
dbConnect = DbConnect(InventoryDAO.getDbDir())
connector = dbConnect.getConnection()
inventoryDAO = InventoryDAO(connector)
reservedInv = inventoryDAO.selectAnEntry(inventoryDetailsId)
itemsOnStack = inventoryDAO.selectEntries("X_index", reservedInv[2])
x_encoder = reservedInv[4]
y_encoder = 0
#if no box at the top, set to 0
if len(itemsOnStack)-1 != reservedInv[3]:
for item in itemsOnStack:
if item[3] == reservedInv[3]+1:
y_encoder = item[5]
break
return [x_encoder, y_encoder]