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from typing import Optional
import urlman
from django.db import models
class Domain(models.Model):
"""
Represents a domain that a user can have an account on.
For protocol reasons, if we want to allow custom usernames
per domain, each "display" domain (the one in the handle) must either let
us serve on it directly, or have a "service" domain that maps
to it uniquely that we can serve on that.
That way, someone coming in with just an Actor URI as their
entrypoint can still try to webfinger preferredUsername@actorDomain
and we can return an appropriate response.
It's possible to just have one domain do both jobs, of course.
This model also represents _other_ servers' domains, which we treat as
display domains for now, until we start doing better probing.
"""
domain = models.CharField(max_length=250, primary_key=True)
service_domain = models.CharField(
max_length=250,
null=True,
blank=True,
db_index=True,
unique=True,
)
# If we own this domain
local = models.BooleanField()
# If we have blocked this domain from interacting with us
blocked = models.BooleanField(default=False)
# Domains can be joinable by any user of the instance (as the default one
# should)
public = models.BooleanField(default=False)
# Domains can also be linked to one or more users for their private use
# This should be display domains ONLY
users = models.ManyToManyField("users.User", related_name="domains", blank=True)
created = models.DateTimeField(auto_now_add=True)
updated = models.DateTimeField(auto_now=True)
class urls(urlman.Urls):
root = "/admin/domains/"
create = "/admin/domains/create/"
edit = "/admin/domains/{self.domain}/"
delete = "/admin/domains/{self.domain}/delete/"
@classmethod
def get_remote_domain(cls, domain: str) -> "Domain":
return cls.objects.get_or_create(domain=domain, local=False)[0]
@classmethod
def get_domain(cls, domain: str) -> Optional["Domain"]:
try:
return cls.objects.get(
models.Q(domain=domain) | models.Q(service_domain=domain)
)
except cls.DoesNotExist:
return None
@property
def uri_domain(self) -> str:
if self.service_domain:
return self.service_domain
return self.domain
@classmethod
def available_for_user(cls, user):
"""
Returns domains that are available for the user to put an identity on
"""
return cls.objects.filter(
models.Q(public=True) | models.Q(users__id=user.id),
local=True,
)
def __str__(self):
return self.domain
def save(self, *args, **kwargs):
# Ensure that we are not conflicting with other domains
if Domain.objects.filter(service_domain=self.domain).exists():
raise ValueError(
f"Domain {self.domain} is already a service domain elsewhere!"
)
if self.service_domain:
if Domain.objects.filter(domain=self.service_domain).exists():
raise ValueError(
f"Service domain {self.service_domain} is already a domain elsewhere!"
)
super().save(*args, **kwargs)
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