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from django.conf import settings
from django.db import models
from django.utils import timezone
from django.utils.deconstruct import deconstructible
from ..utils import gen_secret_key
@deconstructible
class SecretKeyGenerator:
"""
Helper to give default values to Client.secret and Client.key
"""
def __init__(self, field):
self.field = field
def __call__(self):
key = gen_secret_key(64)
while self.get_model().objects.filter(**{self.field: key}).exists():
key = gen_secret_key(64)
return key
class ConsumerSecretKeyGenerator(SecretKeyGenerator):
def get_model(self):
return Consumer
class TokenSecretKeyGenerator(SecretKeyGenerator):
def get_model(self):
return Token
class Consumer(models.Model):
name = models.CharField(max_length=255, unique=True)
private_key = models.CharField(
max_length=64, unique=True,
default=ConsumerSecretKeyGenerator('private_key')
)
public_key = models.CharField(
max_length=64, unique=True,
default=ConsumerSecretKeyGenerator('public_key')
)
def __unicode__(self):
return self.name
def rotate_keys(self):
self.secret = ConsumerSecretKeyGenerator('private_key')()
self.key = ConsumerSecretKeyGenerator('public_key')()
self.save()
class Token(models.Model):
consumer = models.ForeignKey(
Consumer,
related_name='tokens',
on_delete=models.CASCADE,
)
request_token = models.CharField(
unique=True, max_length=64,
default=TokenSecretKeyGenerator('request_token')
)
access_token = models.CharField(
unique=True, max_length=64,
default=TokenSecretKeyGenerator('access_token')
)
timestamp = models.DateTimeField(default=timezone.now)
redirect_to = models.CharField(max_length=1023)
user = models.ForeignKey(
getattr(settings, 'AUTH_USER_MODEL', 'auth.User'),
null=True,
on_delete=models.CASCADE,
)
def refresh(self):
self.timestamp = timezone.now()
self.save()