dynamicweb/hosting/models.py

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import os
from django.db import models
from django.utils.translation import ugettext_lazy as _
from django.utils.functional import cached_property
from Crypto.PublicKey import RSA
from stored_messages.settings import stored_messages_settings
from membership.models import StripeCustomer
from utils.models import BillingAddress
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from utils.mixins import AssignPermissionsMixin
from .managers import VMPlansManager
class VirtualMachineType(models.Model):
HETZNER_NUG = 'hetzner_nug'
HETZNER = 'hetzner'
HETZNER_R6 = 'hetzner_raid6'
HETZNER_G = 'hetzner_glusterfs'
BERN = 'bern'
DE_LOCATION = 'DE'
CH_LOCATION = 'CH'
HOSTING_TYPES = (
(HETZNER_NUG, 'Hetzner No Uptime Guarantee'),
(HETZNER, 'Hetzner'),
(HETZNER_R6, 'Hetzner Raid6'),
(HETZNER_G, 'Hetzner Glusterfs'),
(BERN, 'Bern'),
)
LOCATIONS_CHOICES = (
(DE_LOCATION, 'Germany'),
(CH_LOCATION, 'Switzerland'),
)
description = models.TextField()
base_price = models.FloatField()
memory_price = models.FloatField()
core_price = models.FloatField()
disk_size_price = models.FloatField()
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hosting_company = models.CharField(max_length=30, choices=HOSTING_TYPES)
location = models.CharField(max_length=3, choices=LOCATIONS_CHOICES)
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def __str__(self):
return "%s" % (self.get_hosting_company_display())
@classmethod
def get_serialized_vm_types(cls):
return [vm.get_serialized_data()
for vm in cls.objects.all()]
def calculate_price(self, specifications):
price = float(specifications['cores']) * self.core_price
price += float(specifications['memory']) * self.memory_price
price += float(specifications['disk_size']) * self.disk_size_price
price += self.base_price
return price
def defeault_price(self):
price = self.base_price
price += self.core_price
price += self.memory_price
price += self.disk_size_price * 10
return price
def get_serialized_data(self):
return {
'description': self.description,
'base_price': self.base_price,
'core_price': self.core_price,
'disk_size_price': self.disk_size_price,
'memory_price': self.memory_price,
'hosting_company_name': self.get_hosting_company_display(),
'hosting_company': self.hosting_company,
'default_price': self.defeault_price(),
'location_code': self.location,
'location': self.get_location_display(),
'id': self.id,
}
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class VirtualMachinePlan(AssignPermissionsMixin, models.Model):
PENDING_STATUS = 'pending'
ONLINE_STATUS = 'online'
CANCELED_STATUS = 'canceled'
VM_STATUS_CHOICES = (
(PENDING_STATUS, 'Pending for activation'),
(ONLINE_STATUS, 'Online'),
(CANCELED_STATUS, 'Canceled')
)
DJANGO = 'django'
RAILS = 'rails'
NODEJS = 'nodejs'
VM_CONFIGURATION = (
(DJANGO, 'Ubuntu 14.04, Django'),
(RAILS, 'Ubuntu 14.04, Rails'),
(NODEJS, 'Debian, NodeJS'),
)
permissions = ('view_virtualmachineplan',
'cancel_virtualmachineplan',
'change_virtualmachineplan')
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cores = models.IntegerField()
memory = models.IntegerField()
disk_size = models.IntegerField()
vm_type = models.ForeignKey(VirtualMachineType)
price = models.FloatField()
public_key = models.TextField(blank=True)
status = models.CharField(max_length=20, choices=VM_STATUS_CHOICES, default=PENDING_STATUS)
ip = models.CharField(max_length=50, blank=True)
configuration = models.CharField(max_length=20, choices=VM_CONFIGURATION)
objects = VMPlansManager()
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class Meta:
permissions = (
('view_virtualmachineplan', 'View Virtual Machine Plan'),
('cancel_virtualmachineplan', 'Cancel Virtual Machine Plan'),
)
def __str__(self):
return self.name
@cached_property
def hosting_company_name(self):
return self.vm_type.get_hosting_company_display()
@cached_property
def location(self):
return self.vm_type.get_location_display()
@cached_property
def name(self):
name = 'vm-%s' % self.id
return name
@cached_property
def notifications(self):
stripe_customer = StripeCustomer.objects.get(hostingorder__vm_plan=self)
backend = stored_messages_settings.STORAGE_BACKEND()
messages = backend.inbox_list(stripe_customer.user)
return messages
@classmethod
def create(cls, data, user):
instance = cls.objects.create(**data)
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instance.assign_permissions(user)
return instance
@staticmethod
def generate_RSA(bits=2048):
'''
Generate an RSA keypair with an exponent of 65537 in PEM format
param: bits The key length in bits
Return private key and public key
'''
new_key = RSA.generate(2048, os.urandom)
public_key = new_key.publickey().exportKey("OpenSSH")
private_key = new_key.exportKey("PEM")
return private_key, public_key
def generate_keys(self):
private_key, public_key = self.generate_RSA()
self.public_key = public_key
self.save(update_fields=['public_key'])
return private_key, public_key
def cancel_plan(self):
self.status = self.CANCELED_STATUS
self.save(update_fields=['status'])
class HostingOrder(AssignPermissionsMixin, models.Model):
ORDER_APPROVED_STATUS = 'Approved'
ORDER_DECLINED_STATUS = 'Declined'
vm_plan = models.ForeignKey(VirtualMachinePlan, related_name='hosting_orders')
customer = models.ForeignKey(StripeCustomer)
billing_address = models.ForeignKey(BillingAddress)
created_at = models.DateTimeField(auto_now_add=True)
approved = models.BooleanField(default=False)
last4 = models.CharField(max_length=4)
cc_brand = models.CharField(max_length=10)
stripe_charge_id = models.CharField(max_length=100, null=True)
permissions = ('view_hostingorder',)
class Meta:
permissions = (
('view_hostingorder', 'View Hosting Order'),
)
def __str__(self):
return "%s" % (self.id)
@cached_property
def status(self):
return self.ORDER_APPROVED_STATUS if self.approved else self.ORDER_DECLINED_STATUS
@classmethod
def create(cls, vm_plan=None, customer=None, billing_address=None):
instance = cls.objects.create(vm_plan=vm_plan, customer=customer,
billing_address=billing_address)
instance.assign_permissions(customer.user)
return instance
def set_approved(self):
self.approved = True
self.save()
def set_stripe_charge(self, stripe_charge):
self.stripe_charge_id = stripe_charge.id
self.last4 = stripe_charge.source.last4
self.cc_brand = stripe_charge.source.brand
self.save()