From f950c1defb23a0cba62bbbbb732a5428f2f416a5 Mon Sep 17 00:00:00 2001
From: "M.Ravi" <mondi.ravi@gmail.com>
Date: Sun, 6 Aug 2017 18:42:27 +0200
Subject: [PATCH] Added datacenterlight/tasks.py

---
 datacenterlight/tasks.py | 162 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 162 insertions(+)
 create mode 100644 datacenterlight/tasks.py

diff --git a/datacenterlight/tasks.py b/datacenterlight/tasks.py
new file mode 100644
index 00000000..69ba08ad
--- /dev/null
+++ b/datacenterlight/tasks.py
@@ -0,0 +1,162 @@
+from __future__ import absolute_import, unicode_literals
+from dynamicweb.celery import app
+from celery.utils.log import get_task_logger
+from django.conf import settings
+from opennebula_api.models import OpenNebulaManager
+from opennebula_api.serializers import VirtualMachineSerializer
+from hosting.models import HostingOrder, HostingBill
+from utils.forms import UserBillingAddressForm
+from datetime import datetime
+from membership.models import StripeCustomer
+from django.core.mail import EmailMessage
+from utils.models import BillingAddress
+
+logger = get_task_logger(__name__)
+
+
+def retry_task(task, exception=None):
+    """Retries the specified task using a "backing off countdown",
+    meaning that the interval between retries grows exponentially
+    with every retry.
+
+    Arguments:
+        task:
+            The task to retry.
+
+        exception:
+            Optionally, the exception that caused the retry.
+    """
+
+    def backoff(attempts):
+        return 2 ** attempts
+
+    kwargs = {
+        'countdown': backoff(task.request.retries),
+    }
+
+    if exception:
+        kwargs['exc'] = exception
+
+    if task.request.retries > settings.CELERY_MAX_RETRIES:
+        msg_text = 'Finished {} retries for create_vm_task'.format(task.request.retries)
+        logger.log(msg_text)
+        # Try sending email and stop
+        email_data = {
+            'subject': '{} CELERY TASK ERROR: {}'.format(settings.DCL_TEXT, msg_text),
+            'from_email': settings.DCL_SUPPORT_FROM_ADDRESS,
+            'to': ['info@ungleich.ch'],
+            'body': "\n".join(["%s=%s" % (k, v) for (k, v) in kwargs.items()]),
+        }
+        email = EmailMessage(**email_data)
+        email.send()
+        return
+    else:
+        raise task.retry(**kwargs)
+
+
+@app.task(bind=True)
+def create_vm_task(self, vm_template_id, user, specs, template, stripe_customer_id, billing_address_data,
+                   billing_address_id,
+                   charge):
+    try:
+        final_price = specs.get('price')
+        billing_address = BillingAddress.objects.filter(id=billing_address_id).first()
+        customer = StripeCustomer.objects.filter(id=stripe_customer_id).first()
+        # Create OpenNebulaManager
+        manager = OpenNebulaManager(email=settings.OPENNEBULA_USERNAME,
+                                    password=settings.OPENNEBULA_PASSWORD)
+
+        # Create a vm using oneadmin, also specify the name
+        vm_id = manager.create_vm(
+            template_id=vm_template_id,
+            specs=specs,
+            vm_name="{email}-{template_name}-{date}".format(
+                email=user.get('email'),
+                template_name=template.get('name'),
+                date=int(datetime.now().strftime("%s")))
+        )
+
+        # Create a Hosting Order
+        order = HostingOrder.create(
+            price=final_price,
+            vm_id=vm_id,
+            customer=customer,
+            billing_address=billing_address
+        )
+
+        # Create a Hosting Bill
+        HostingBill.create(
+            customer=customer, billing_address=billing_address)
+
+        # Create Billing Address for User if he does not have one
+        if not customer.user.billing_addresses.count():
+            billing_address_data.update({
+                'user': customer.user.id
+            })
+            billing_address_user_form = UserBillingAddressForm(
+                billing_address_data)
+            billing_address_user_form.is_valid()
+            billing_address_user_form.save()
+
+        # Associate an order with a stripe payment
+        charge_object = DictDotLookup(charge)
+        order.set_stripe_charge(charge_object)
+
+        # If the Stripe payment succeeds, set order status approved
+        order.set_approved()
+
+        vm = VirtualMachineSerializer(manager.get_vm(vm_id)).data
+
+        context = {
+            'name': user.get('name'),
+            'email': user.get('email'),
+            'cores': specs.get('cpu'),
+            'memory': specs.get('memory'),
+            'storage': specs.get('disk_size'),
+            'price': specs.get('price'),
+            'template': template.get('name'),
+            'vm.name': vm['name'],
+            'vm.id': vm['vm_id'],
+            'order.id': order.id
+        }
+        email_data = {
+            'subject': settings.DCL_TEXT + " Order from %s" % context['email'],
+            'from_email': settings.DCL_SUPPORT_FROM_ADDRESS,
+            'to': ['info@ungleich.ch'],
+            'body': "\n".join(["%s=%s" % (k, v) for (k, v) in context.items()]),
+            'reply_to': [context['email']],
+        }
+        email = EmailMessage(**email_data)
+        email.send()
+    except Exception as e:
+        logger.error(str(e))
+        retry_task(self)
+
+
+class DictDotLookup(object):
+    """
+    Creates objects that behave much like a dictionaries, but allow nested
+    key access using object '.' (dot) lookups.
+    """
+
+    def __init__(self, d):
+        for k in d:
+            if isinstance(d[k], dict):
+                self.__dict__[k] = DictDotLookup(d[k])
+            elif isinstance(d[k], (list, tuple)):
+                l = []
+                for v in d[k]:
+                    if isinstance(v, dict):
+                        l.append(DictDotLookup(v))
+                    else:
+                        l.append(v)
+                self.__dict__[k] = l
+            else:
+                self.__dict__[k] = d[k]
+
+    def __getitem__(self, name):
+        if name in self.__dict__:
+            return self.__dict__[name]
+
+    def __iter__(self):
+        return iter(self.__dict__.keys())