- Added PricingPlan Model

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

matrixhosting/tasks.py

@@ -0,0 +1,64 @@
+import logging
+from datetime import date, timedelta, timezone
+from django.conf import settings
+from django.template.loader import render_to_string
+from django_q.tasks import async_task, schedule
+from django_q.models import Schedule
+from django.db.models import Q
+from uncloud_pay.models import Bill, Payment
+from uncloud_pay.selectors import has_enough_balance, get_balance_for_user
+from .models import VMInstance
+
+log = logging.getLogger(__name__)
+
+def send_warning_email(bill, html_message):
+    schedule('django.core.mail.send_mail',
+             'Renewal Warning',
+             None,
+             settings.RENEWAL_FROM_EMAIL,
+             [bill.owner.email],
+             html_message,
+             schedule_type=Schedule.ONCE,
+             next_run=timezone.now() + timedelta(hours=1))
+
+def charge_open_bills():
+    un_paid_bills = Bill.objects.filter(is_closed=False)
+    for bill in un_paid_bills:
+        date_diff = (date.today() - bill.due_date.date()).days
+        # If there is not enough money in the account 7 days before renewal, the system sends a warning
+        # If there is not enough money in the account 3 days before renewal, the system sends a 2nd warning
+        # If on renewal date there is not enough money in the account, delete the instance
+        if date_diff == 7:
+            if not has_enough_balance(bill.owner):
+                context = {'name': bill.owner.name, 'message': "You don't have enough balance for renewal... upload to your account _here"}
+                html_message = render_to_string('matrixhosting/emails/renewal_warning.html', context)
+                send_warning_email(bill, html_message)
+        elif date_diff == 3:
+            if not has_enough_balance(bill.owner):
+                context = {'name': bill.owner.name, 'message': "You don't have enough balance for renewal... Your instance will be deleted in 3 days"}
+                html_message = render_to_string('matrixhosting/emails/renewal_warning.html', context)
+                send_warning_email(bill, html_message)
+        elif date_diff <= 0:
+            if not has_enough_balance(bill.owner):
+                VMInstance.delete_for_bill(bill)
+            else:
+                try:
+                    balance = get_balance_for_user(bill.owner)
+                    if balance < 0:
+                       payment = Payment.objects.create(owner=bill.owner, amount=balance, source='stripe')
+                       if payment:
+                           bill.close()
+                    bill.close()
+                except Exception as e:
+                    log.error(f"It seems that there is issue in payment for {bill.owner.name}", e)
+                    # do nothing
+            
+
+def process_recurring_orders():
+    """
+    Check for pending recurring and charge it and generate bills or send the customer warning
+    """
+    Bill.create_bills_for_all_users()
+
+def delete_instance(instance_id):
+    VMInstance.objects.delete(instance_id)