- Added PricingPlan Model

- Implement a complete cycle for buying a Matrix Chat Host
- Refactor the Payement cycle and stripe related methods

uncloud_pay/selectors.py

@@ -1,9 +1,5 @@
 from django.utils import timezone
 from django.db import transaction
-from django.db.models import Q
-
-from uncloud.selectors import filter_for_when
-from uncloud.models import UncloudProvider
 from .models import *
 
 def get_payments_for_user(user):
@@ -12,12 +8,11 @@ def get_payments_for_user(user):
     return sum(payments)
 
 def get_spendings_for_user(user):
-    orders = Order.objects.filter(owner=user)
+    bills = Bill.objects.filter(owner=user)
 
     amount = 0
-    for order in orders:
-        amount += order.one_time_price
-        amount += order.recurring_price * order.count_used(when=timezone.now())
+    for bill in bills:
+        amount += bill.sum
 
     return amount
 
@@ -25,34 +20,12 @@ def get_spendings_for_user(user):
 def get_balance_for_user(user):
     return get_payments_for_user(user) - get_spendings_for_user(user)
 
+@transaction.atomic
+def has_enough_balance(user, due_amount):
+    balance = get_balance_for_user(user)
+    if balance >= due_amount:
+        return True
+    return False
+
 def get_billing_address_for_user(user):
-    return BillingAddress.objects.get(owner=user, active=True)
-
-def get_vat_rate(billing_address, when=None):
-    """
-    Returns the VAT rate for business to customer.
-
-    B2B is always 0% with the exception of trading within the own country
-    """
-
-    country = billing_address.country
-
-    # Need to have a provider country
-    uncloud_provider = filter_for_when(UncloudProvider.objects.all()).get()
-    vatrate = filter_for_when(VATRate.objects.filter(territory_codes=country), when).first()
-
-    # By default we charge VAT. This affects:
-    # - Same country sales (VAT applied)
-    # - B2C to EU  (VAT applied)
-    rate = vatrate.rate
-
-    # Exception: if...
-    # - the billing_address is in EU,
-    # - the vat_number has been set
-    # - the vat_number has been verified
-    # Then we do not charge VAT
-
-    if uncloud_provider.country != country and billing_address.vat_number and billing_address.vat_number_verified:
-        rate = 0
-
-    return rate
+    return BillingAddress.objects.filter(owner=user, active=True).first()