Move django-based uncloud to top-level

uncloud_pay/management/commands/charge-negative-balance.py

@@ -0,0 +1,31 @@
+from django.core.management.base import BaseCommand
+from uncloud_auth.models import User
+from uncloud_pay.models import Order, Bill, PaymentMethod, get_balance_for_user
+
+from datetime import timedelta
+from django.utils import timezone
+
+class Command(BaseCommand):
+    help = 'Generate bills and charge customers if necessary.'
+
+    def add_arguments(self, parser):
+        pass
+
+    def handle(self, *args, **options):
+        users = User.objects.all()
+        print("Processing {} users.".format(users.count()))
+        for user in users:
+            balance = get_balance_for_user(user)
+            if balance < 0:
+                print("User {} has negative balance ({}), charging.".format(user.username, balance))
+                payment_method = PaymentMethod.get_primary_for(user)
+                if payment_method != None:
+                    amount_to_be_charged = abs(balance)
+                    charge_ok = payment_method.charge(amount_to_be_charged)
+                    if not charge_ok:
+                        print("ERR: charging {} with method {} failed"
+                                .format(user.username, payment_method.uuid)
+                                )
+                else:
+                    print("ERR: no payment method registered for {}".format(user.username))
+        print("=> Done.")