def create_one_license(selling_shop,data_transfer_plan,prefix):
# read current index
bulk_license_manager = BulkLicenseManagement.objects.all()[0]
current_index = bulk_license_manager.current_index
# set up username and password
username = prefix + str(current_index)
password = generate_md5_hash(selling_shop.username + str(current_index))
password = password[: ( len(password)/2 ) ]
new_user = User(username=username, password=password)
current_index2 = BulkLicenseManagement.objects.all()[0].current_index
if current_index != current_index2:
raise DatabaseError()
else:
new_user = User.objects.create_user(username=username, password=password)
# create a userprofile for the new customer
new_user_profile = UserProfile()
new_user_profile.user = new_user
new_user_profile.is_shop = False
new_user_profile.email_subscription = False
new_user_profile.save()
# create CustomerProfile
new_customer_profile = CustomerProfile()
new_customer_profile.user_profile = new_user_profile
new_customer_profile.save()
#create purchase object
new_purchase = Purchase()
new_purchase.user = new_user
new_purchase.data_transfer_plan = data_transfer_plan
new_purchase.remaining_allowance_frequency = data_transfer_plan.freq
new_purchase.selling_shop = selling_shop
# purchase.shop_debited = false is by default.
new_purchase.save()
new_purchase.follow_up_number = generate_md5_hash(str(new_purchase.id))
new_purchase.save()
#increase the current index
current_index = current_index + 1
bulk_license_manager.current_index = current_index
bulk_license_manager.save()
return (username,password)
