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takahe/users/models/identity.py

1180 wiersze
42 KiB
Python
Czysty Wina Historia

import logging
import ssl
from functools import cached_property, partial
from typing import Literal, Optional
from urllib.parse import urlparse
import httpx
import urlman
from django.conf import settings
from django.db import IntegrityError, models, transaction
from django.utils import timezone
from django.utils.functional import lazy
from lxml import etree
from core.exceptions import ActorMismatchError
from core.html import ContentRenderer, FediverseHtmlParser
from core.json import json_from_response
from core.ld import (
canonicalise,
format_ld_date,
get_first_image_url,
get_list,
media_type_from_filename,
)
from core.models import Config
from core.signatures import HttpSignature, RsaKeys
from core.snowflake import Snowflake
from core.uploads import upload_namer
from core.uris import (
AutoAbsoluteUrl,
ProxyAbsoluteUrl,
RelativeAbsoluteUrl,
StaticAbsoluteUrl,
)
from stator.exceptions import TryAgainLater
from stator.models import State, StateField, StateGraph, StatorModel
from users.models.domain import Domain
from users.models.inbox_message import InboxMessage
from users.models.system_actor import SystemActor
logger = logging.getLogger(__name__)
class IdentityStates(StateGraph):
"""
Identities sit in "updated" for up to system.identity_max_age, and then
go back to "outdated" for refetching.
When a local identity is "edited" or "deleted", it will fanout the change to
all followers and transition to "updated"
"""
outdated = State(try_interval=3600, force_initial=True)
updated = State(try_interval=86400 * 15, attempt_immediately=False)
edited = State(try_interval=300, attempt_immediately=True)
deleted = State(try_interval=300, attempt_immediately=True)
deleted_fanned_out = State(delete_after=86400 * 7)
moved = State(try_interval=300, attempt_immediately=True)
moved_fanned_out = State(externally_progressed=True)
deleted.transitions_to(deleted_fanned_out)
edited.transitions_to(updated)
updated.transitions_to(edited)
edited.transitions_to(deleted)
outdated.transitions_to(updated)
updated.transitions_to(outdated)
updated.transitions_to(moved)
moved.transitions_to(moved_fanned_out)
@classmethod
def group_deleted(cls):
return [cls.deleted, cls.deleted_fanned_out]
@classmethod
def targets_fan_out(cls, identity: "Identity", type_: str) -> None:
from activities.models import FanOut
from users.models import Follow
# Fan out to each target
shared_inboxes = set()
for follower in Follow.objects.select_related("source", "target").filter(
target=identity
):
# Dedupe shared_inbox_uri
shared_uri = follower.source.shared_inbox_uri
if shared_uri and shared_uri in shared_inboxes:
continue
FanOut.objects.create(
identity=follower.source,
type=type_,
subject_identity=identity,
)
shared_inboxes.add(shared_uri)
@classmethod
def handle_edited(cls, instance: "Identity"):
from activities.models import FanOut
if not instance.local:
return cls.updated
cls.targets_fan_out(instance, FanOut.Types.identity_edited)
return cls.updated
@classmethod
def handle_moved(cls, instance: "Identity"):
from activities.models import FanOut
if not instance.local:
return cls.updated
cls.targets_fan_out(instance, FanOut.Types.identity_moved)
return cls.moved_fanned_out
@classmethod
def handle_deleted(cls, instance: "Identity"):
from activities.models import (
FanOut,
Post,
PostInteraction,
PostInteractionStates,
PostStates,
TimelineEvent,
)
from users.models import Bookmark, Follow, FollowStates, HashtagFollow, Report
if not instance.local:
return cls.updated
# Delete local data
TimelineEvent.objects.filter(identity=instance).delete()
Bookmark.objects.filter(identity=instance).delete()
HashtagFollow.objects.filter(identity=instance).delete()
Report.objects.filter(source_identity=instance).delete()
# Nullify all fields and fanout
instance.name = ""
instance.summary = ""
instance.metadata = []
instance.aliases = []
instance.icon_uri = ""
instance.discoverable = False
instance.image.delete(save=False)
instance.icon.delete(save=False)
instance.save()
cls.targets_fan_out(instance, FanOut.Types.identity_edited)
# Delete all posts and interactions
Post.transition_perform_queryset(instance.posts, PostStates.deleted)
PostInteraction.transition_perform_queryset(
instance.interactions, PostInteractionStates.undone
)
# Fanout the deletion and unfollow from both directions
cls.targets_fan_out(instance, FanOut.Types.identity_deleted)
for follower in Follow.objects.filter(target=instance):
follower.transition_perform(FollowStates.rejecting)
for following in Follow.objects.filter(source=instance):
following.transition_perform(FollowStates.undone)
return cls.deleted_fanned_out
@classmethod
def handle_outdated(cls, identity: "Identity"):
# Local identities never need fetching
if identity.local:
return cls.updated
# Run the actor fetch and progress to updated if it succeeds
if identity.fetch_actor():
return cls.updated
@classmethod
def handle_updated(cls, instance: "Identity"):
if not instance.local and instance.state_age > Config.system.identity_max_age:
return cls.outdated
class IdentityQuerySet(models.QuerySet):
def not_deleted(self):
query = self.exclude(state__in=IdentityStates.group_deleted())
return query
class IdentityManager(models.Manager):
def get_queryset(self):
return IdentityQuerySet(self.model, using=self._db)
def not_deleted(self):
return self.get_queryset().not_deleted()
class Identity(StatorModel):
"""
Represents both local and remote Fediverse identities (actors)
"""
class Restriction(models.IntegerChoices):
none = 0
limited = 1
blocked = 2
ACTOR_TYPES = ["person", "service", "application", "group", "organization"]
id = models.BigIntegerField(primary_key=True, default=Snowflake.generate_identity)
# The Actor URI is essentially also a PK - we keep the default numeric
# one around as well for making nice URLs etc.
actor_uri = models.CharField(max_length=500, unique=True)
state = StateField(IdentityStates)
local = models.BooleanField(db_index=True)
users = models.ManyToManyField(
"users.User",
related_name="identities",
blank=True,
)
username = models.CharField(max_length=500, blank=True, null=True)
# Must be a display domain if present
domain = models.ForeignKey(
"users.Domain",
blank=True,
null=True,
on_delete=models.PROTECT,
related_name="identities",
)
name = models.CharField(max_length=500, blank=True, null=True)
summary = models.TextField(blank=True, null=True)
manually_approves_followers = models.BooleanField(blank=True, null=True)
discoverable = models.BooleanField(default=True)
profile_uri = models.CharField(max_length=500, blank=True, null=True)
inbox_uri = models.CharField(max_length=500, blank=True, null=True)
shared_inbox_uri = models.CharField(max_length=500, blank=True, null=True)
outbox_uri = models.CharField(max_length=500, blank=True, null=True)
icon_uri = models.CharField(max_length=500, blank=True, null=True)
image_uri = models.CharField(max_length=500, blank=True, null=True)
followers_uri = models.CharField(max_length=500, blank=True, null=True)
following_uri = models.CharField(max_length=500, blank=True, null=True)
featured_collection_uri = models.CharField(max_length=500, blank=True, null=True)
actor_type = models.CharField(max_length=100, default="person")
icon = models.ImageField(
upload_to=partial(upload_namer, "profile_images"), blank=True, null=True
)
image = models.ImageField(
upload_to=partial(upload_namer, "background_images"), blank=True, null=True
)
# Should be a list of {"name":..., "value":...} dicts
metadata = models.JSONField(blank=True, null=True)
# Should be a list of object URIs (we don't want a full M2M here)
pinned = models.JSONField(blank=True, null=True)
# A list of other actor URIs - if this account was moved, should contain
# the one URI it was moved to.
aliases = models.JSONField(blank=True, null=True)
# Admin-only moderation fields
sensitive = models.BooleanField(default=False)
restriction = models.IntegerField(
choices=Restriction.choices, default=Restriction.none, db_index=True
)
admin_notes = models.TextField(null=True, blank=True)
private_key = models.TextField(null=True, blank=True)
public_key = models.TextField(null=True, blank=True)
public_key_id = models.TextField(null=True, blank=True)
created = models.DateTimeField(auto_now_add=True)
updated = models.DateTimeField(auto_now=True)
fetched = models.DateTimeField(null=True, blank=True)
deleted = models.DateTimeField(null=True, blank=True)
objects = IdentityManager()
### Model attributes ###
class Meta:
verbose_name_plural = "identities"
unique_together = [("username", "domain")]
indexes: list = [] # We need this so Stator can add its own
class urls(urlman.Urls):
view = "/@{self.username}@{self.domain_id}/"
replies = "{view}replies/"
settings = "{view}settings/"
action = "{view}action/"
followers = "{view}followers/"
following = "{view}following/"
search = "{view}search/"
activate = "{view}activate/"
admin = "/admin/identities/"
admin_edit = "{admin}{self.pk}/"
djadmin_edit = "/djadmin/users/identity/{self.id}/change/"
def get_scheme(self, url):
return "https"
def get_hostname(self, url):
return self.instance.domain.uri_domain
def __str__(self):
if self.username and self.domain_id:
return self.handle
return self.actor_uri
def absolute_profile_uri(self):
"""
Returns a profile URI that is always absolute, for sending out to
other servers.
"""
if self.local:
return f"https://{self.domain.uri_domain}/@{self.username}/"
else:
return self.profile_uri
def all_absolute_profile_uris(self) -> list[str]:
"""
Returns alist of profile URIs that are always absolute. For local addresses,
this includes the short and long form URIs.
"""
if not self.local:
return [self.profile_uri]
return [
f"https://{self.domain.uri_domain}/@{self.username}/",
f"https://{self.domain.uri_domain}/@{self.username}@{self.domain_id}/",
]
def local_icon_url(self) -> RelativeAbsoluteUrl:
"""
Returns an icon for use by us, with fallbacks to a placeholder
"""
if self.icon:
return RelativeAbsoluteUrl(self.icon.url)
elif self.icon_uri:
return ProxyAbsoluteUrl(
f"/proxy/identity_icon/{self.pk}/",
remote_url=self.icon_uri,
)
else:
return StaticAbsoluteUrl("img/unknown-icon-128.png")
def local_image_url(self) -> RelativeAbsoluteUrl | None:
"""
Returns a background image for us, returning None if there isn't one
"""
if self.image:
return AutoAbsoluteUrl(self.image.url)
elif self.image_uri:
return ProxyAbsoluteUrl(
f"/proxy/identity_image/{self.pk}/",
remote_url=self.image_uri,
)
return None
@property
def safe_summary(self):
return ContentRenderer(local=True).render_identity_summary(self.summary, self)
@property
def safe_metadata(self):
renderer = ContentRenderer(local=True)
if not self.metadata:
return []
return [
{
"name": renderer.render_identity_data(data["name"], self, strip=True),
"value": renderer.render_identity_data(data["value"], self, strip=True),
}
for data in self.metadata
]
def ensure_uris(self):
"""
Ensures that local identities have all the URIs populated on their fields
(this lets us add new ones easily)
"""
if self.local:
self.inbox_uri = self.actor_uri + "inbox/"
self.outbox_uri = self.actor_uri + "outbox/"
self.featured_collection_uri = self.actor_uri + "collections/featured/"
self.followers_uri = self.actor_uri + "followers/"
self.following_uri = self.actor_uri + "following/"
self.shared_inbox_uri = f"https://{self.domain.uri_domain}/inbox/"
def add_alias(self, actor_uri: str):
self.aliases = (self.aliases or []) + [actor_uri]
self.save()
def remove_alias(self, actor_uri: str):
self.aliases = [x for x in (self.aliases or []) if x != actor_uri]
self.save()
### Alternate constructors/fetchers ###
@classmethod
def by_handle(cls, handle, fetch: bool = False) -> Optional["Identity"]:
username, domain = handle.lstrip("@").split("@", 1)
return cls.by_username_and_domain(username=username, domain=domain, fetch=fetch)
@classmethod
def by_username_and_domain(
cls,
username: str,
domain: str | Domain,
fetch: bool = False,
local: bool = False,
) -> Optional["Identity"]:
"""
Get an Identity by username and domain.
When fetch is True, a failed lookup will do a webfinger lookup to attempt to do
a lookup by actor_uri, creating an Identity record if one does not exist. When
local is True, lookups will be restricted to local domains.
If domain is a Domain, domain.local is used instead of passsed local.
"""
if username.startswith("@"):
raise ValueError("Username must not start with @")
domain_instance = None
if isinstance(domain, Domain):
domain_instance = domain
local = domain.local
domain = domain.domain
else:
domain = domain.lower()
domain_instance = Domain.get_domain(domain)
local = domain_instance.local if domain_instance else local
with transaction.atomic():
try:
if local:
return cls.objects.get(
username__iexact=username,
domain_id=domain,
local=True,
)
else:
return cls.objects.get(
username__iexact=username,
domain_id=domain,
)
except cls.DoesNotExist:
if fetch and not local:
actor_uri, handle = cls.fetch_webfinger(f"{username}@{domain}")
if handle is None:
return None
# See if this actually does match an existing actor
try:
return cls.objects.get(actor_uri=actor_uri)
except cls.DoesNotExist:
pass
# OK, make one
username, domain = handle.split("@")
if not domain_instance:
domain_instance = Domain.get_remote_domain(domain)
return cls.objects.create(
actor_uri=actor_uri,
username=username,
domain_id=domain_instance,
local=False,
)
return None
@classmethod
def by_actor_uri(cls, uri, create=False, transient=False) -> "Identity":
try:
return cls.objects.get(actor_uri=uri)
except cls.DoesNotExist:
if create:
if transient:
# Some code (like inbox fetching) doesn't need this saved
# to the DB until the fetch succeeds
return cls(actor_uri=uri, local=False)
else:
# parallelism may cause another simultaneous worker thread
# to try to create the same identity - so use database level
# constructs to avoid an integrity error
identity, created = cls.objects.update_or_create(
actor_uri=uri, local=False
)
return identity
else:
raise cls.DoesNotExist(f"No identity found with actor_uri {uri}")
### Dynamic properties ###
@property
def name_or_handle(self):
return self.name or self.handle
@cached_property
def html_name_or_handle(self):
"""
Return the name_or_handle with any HTML substitutions made
"""
return ContentRenderer(local=True).render_identity_data(
self.name_or_handle, self, strip=True
)
@property
def handle(self):
if self.username is None:
return "(unknown user)"
if self.domain_id:
return f"{self.username}@{self.domain_id}"
return f"{self.username}@(unknown server)"
@property
def data_age(self) -> float:
"""
How old our copy of this data is, in seconds
"""
if self.local:
return 0
if self.fetched is None:
return 10000000000
return (timezone.now() - self.fetched).total_seconds()
@property
def outdated(self) -> bool:
# TODO: Setting
return self.data_age > 60 * 24 * 24
@property
def blocked(self) -> bool:
return self.restriction == self.Restriction.blocked
@property
def limited(self) -> bool:
return self.restriction == self.Restriction.limited
### ActivityPub (outbound) ###
def to_webfinger(self):
aliases = [self.absolute_profile_uri()]
actor_links = []
if self.restriction != Identity.Restriction.blocked:
# Blocked users don't get a profile page
actor_links.append(
{
"rel": "http://webfinger.net/rel/profile-page",
"type": "text/html",
"href": self.absolute_profile_uri(),
},
)
# TODO: How to handle Restriction.limited and Restriction.blocked?
# Exposing the activity+json will allow migrating off server
actor_links.extend(
[
{
"rel": "self",
"type": "application/activity+json",
"href": self.actor_uri,
}
]
)
return {
"subject": f"acct:{self.handle}",
"aliases": aliases,
"links": actor_links,
}
def to_ap(self):
from activities.models import Emoji
self.ensure_uris()
response = {
"id": self.actor_uri,
"type": self.actor_type.title(),
"inbox": self.inbox_uri,
"outbox": self.outbox_uri,
"featured": self.featured_collection_uri,
"followers": self.followers_uri,
"following": self.following_uri,
"preferredUsername": self.username,
"publicKey": {
"id": self.public_key_id,
"owner": self.actor_uri,
"publicKeyPem": self.public_key,
},
"published": self.created.strftime("%Y-%m-%dT%H:%M:%SZ"),
"url": self.absolute_profile_uri(),
"toot:discoverable": self.discoverable,
}
if self.name:
response["name"] = self.name
if self.summary:
response["summary"] = self.summary
if self.icon:
response["icon"] = {
"type": "Image",
"mediaType": media_type_from_filename(self.icon.name),
"url": self.icon.url,
}
if self.image:
response["image"] = {
"type": "Image",
"mediaType": media_type_from_filename(self.image.name),
"url": self.image.url,
}
if self.shared_inbox_uri:
response["endpoints"] = {
"sharedInbox": self.shared_inbox_uri,
}
if self.metadata:
response["attachment"] = [
{
"type": "PropertyValue",
"name": FediverseHtmlParser(item["name"]).plain_text,
"value": FediverseHtmlParser(item["value"]).html,
}
for item in self.metadata
]
if self.aliases:
response["alsoKnownAs"] = self.aliases
# Emoji
emojis = Emoji.emojis_from_content(
(self.name or "") + " " + (self.summary or ""), None
)
if emojis:
response["tag"] = []
for emoji in emojis:
response["tag"].append(emoji.to_ap_tag())
return response
def to_ap_tag(self):
"""
Return this Identity as an ActivityPub Tag
"""
return {
"href": self.actor_uri,
"name": "@" + self.handle,
"type": "Mention",
}
def to_update_ap(self):
"""
Returns the AP JSON to update this object
"""
object = self.to_ap()
return {
"type": "Update",
"id": self.actor_uri + "#update",
"actor": self.actor_uri,
"object": object,
}
def to_delete_ap(self):
"""
Returns the AP JSON to delete this object
"""
object = self.to_ap()
return {
"type": "Delete",
"id": self.actor_uri + "#delete",
"actor": self.actor_uri,
"object": object,
}
### ActivityPub (inbound) ###
@classmethod
def handle_update_ap(cls, data):
"""
Takes an incoming update.person message and just forces us to add it
to our fetch queue (don't want to bother with two load paths right now)
"""
# Find by actor
try:
actor = cls.by_actor_uri(data["actor"])
actor.transition_perform(IdentityStates.outdated)
except cls.DoesNotExist:
pass
@classmethod
def handle_delete_ap(cls, data):
"""
Takes an incoming update.person message and just forces us to add it
to our fetch queue (don't want to bother with two load paths right now)
"""
# Assert that the actor matches the object
if data["actor"] != data["object"]:
raise ActorMismatchError(
f"Actor {data['actor']} trying to delete identity {data['object']}"
)
# Find by actor
try:
actor = cls.by_actor_uri(data["actor"])
actor.delete()
except cls.DoesNotExist:
pass
### Deletion ###
def mark_deleted(self):
"""
Marks the identity and all of its related content as deleted.
"""
from api.models import Authorization, Token
# Remove all login tokens
Authorization.objects.filter(identity=self).delete()
Token.objects.filter(identity=self).delete()
# Remove all users from ourselves and mark deletion date
self.users.set([])
self.deleted = timezone.now()
self.save()
# Move ourselves to deleted
self.transition_perform(IdentityStates.deleted)
### Actor/Webfinger fetching ###
@classmethod
def fetch_webfinger_url(cls, domain: str):
"""
Given a domain (hostname), returns the correct webfinger URL to use
based on probing host-meta.
"""
with httpx.Client(
timeout=settings.SETUP.REMOTE_TIMEOUT,
headers={"User-Agent": settings.TAKAHE_USER_AGENT},
) as client:
try:
response = client.get(
f"https://{domain}/.well-known/host-meta",
follow_redirects=True,
headers={"Accept": "application/xml"},
)
# In the case of anything other than a success, we'll still try
# hitting the webfinger URL on the domain we were given to handle
# incorrectly setup servers.
if response.status_code == 200 and response.content.strip():
tree = etree.fromstring(response.content)
template = tree.xpath(
"string(.//*[local-name() = 'Link' and @rel='lrdd' and (not(@type) or @type='application/jrd+json')]/@template)"
)
if template:
return template
except (httpx.RequestError, etree.ParseError):
pass
return f"https://{domain}/.well-known/webfinger?resource={{uri}}"
@classmethod
def fetch_webfinger(cls, handle: str) -> tuple[str | None, str | None]:
"""
Given a username@domain handle, returns a tuple of
(actor uri, canonical handle) or None, None if it does not resolve.
"""
domain = handle.split("@")[1].lower()
try:
webfinger_url = cls.fetch_webfinger_url(domain)
except ssl.SSLCertVerificationError:
return None, None
# Go make a Webfinger request
with httpx.Client(
timeout=settings.SETUP.REMOTE_TIMEOUT,
headers={"User-Agent": settings.TAKAHE_USER_AGENT},
) as client:
try:
response = client.get(
webfinger_url.format(uri=f"acct:{handle}"),
follow_redirects=True,
headers={"Accept": "application/json"},
)
response.raise_for_status()
except (httpx.HTTPError, ssl.SSLCertVerificationError) as ex:
response = getattr(ex, "response", None)
if isinstance(ex, httpx.TimeoutException) or (
response and response.status_code in [408, 429, 504]
):
raise TryAgainLater() from ex
elif (
response
and response.status_code < 500
and response.status_code not in [400, 401, 403, 404, 406, 410]
):
raise ValueError(
f"Client error fetching webfinger: {response.status_code}",
response.content,
)
return None, None
try:
data = response.json()
except ValueError:
# Some servers return these with a 200 status code!
if b"not found" in response.content.lower():
return None, None
raise ValueError(
"JSON parse error fetching webfinger",
response.content,
)
try:
if data["subject"].startswith("acct:"):
data["subject"] = data["subject"][5:]
for link in data["links"]:
if (
link.get("type") == "application/activity+json"
and link.get("rel") == "self"
):
return link["href"], data["subject"]
except KeyError:
# Server returning wrong payload structure
pass
return None, None
@classmethod
def fetch_pinned_post_uris(cls, uri: str) -> list[str]:
"""
Fetch an identity's featured collection.
"""
with httpx.Client(
timeout=settings.SETUP.REMOTE_TIMEOUT,
headers={"User-Agent": settings.TAKAHE_USER_AGENT},
) as client:
try:
response = client.get(
uri,
follow_redirects=True,
headers={"Accept": "application/activity+json"},
)
response.raise_for_status()
except (httpx.HTTPError, ssl.SSLCertVerificationError) as ex:
response = getattr(ex, "response", None)
if isinstance(ex, httpx.TimeoutException) or (
response and response.status_code in [408, 429, 504]
):
raise TryAgainLater() from ex
elif (
response
and response.status_code < 500
and response.status_code not in [401, 403, 404, 406, 410]
):
raise ValueError(
f"Client error fetching featured collection: {response.status_code}",
response.content,
)
return []
try:
data = canonicalise(response.json(), include_security=True)
items: list[dict | str] = []
if "orderedItems" in data:
items = list(reversed(data["orderedItems"]))
elif "items" in data:
items = list(data["items"])
ids = []
for item in items:
if not isinstance(item, dict):
continue
post_obj: dict | None = item
if item["type"] in ["Create", "Update"]:
post_obj = item.get("object")
if post_obj:
ids.append(post_obj["id"])
return ids
except ValueError:
# Some servers return these with a 200 status code!
if b"not found" in response.content.lower():
return []
raise ValueError(
"JSON parse error fetching featured collection",
response.content,
)
def fetch_actor(self) -> bool:
"""
Fetches the user's actor information, as well as their domain from
webfinger if it's available.
"""
from activities.models import Emoji
if self.local:
raise ValueError("Cannot fetch local identities")
try:
response = SystemActor().signed_request(
method="get",
uri=self.actor_uri,
)
except httpx.TimeoutException:
raise TryAgainLater()
except (httpx.RequestError, ssl.SSLCertVerificationError):
return False
content_type = response.headers.get("content-type")
if content_type and "html" in content_type:
# Some servers don't properly handle "application/activity+json"
return False
status_code = response.status_code
if status_code >= 400:
if status_code in [408, 429, 504]:
raise TryAgainLater()
if status_code == 410 and self.pk:
# Their account got deleted, so let's do the same.
Identity.objects.filter(pk=self.pk).delete()
if status_code < 500 and status_code not in [401, 403, 404, 406, 410]:
logger.info(
"Client error fetching actor: %d %s", status_code, self.actor_uri
)
return False
json_data = json_from_response(response)
if not json_data:
return False
try:
document = canonicalise(json_data, include_security=True)
except ValueError:
# servers with empty or invalid responses are inevitable
logger.info(
"Invalid response fetching actor %s",
self.actor_uri,
extra={
"content": response.content,
},
)
return False
if "type" not in document:
return False
self.name = document.get("name")
self.profile_uri = document.get("url")
self.inbox_uri = document.get("inbox")
self.outbox_uri = document.get("outbox")
self.followers_uri = document.get("followers")
self.following_uri = document.get("following")
self.featured_collection_uri = document.get("featured")
self.actor_type = document["type"].lower()
self.shared_inbox_uri = document.get("endpoints", {}).get("sharedInbox")
self.summary = document.get("summary")
self.username = document.get("preferredUsername")
if self.username and "@value" in self.username:
self.username = self.username["@value"]
if self.username:
self.username = self.username
self.manually_approves_followers = document.get("manuallyApprovesFollowers")
self.public_key = document.get("publicKey", {}).get("publicKeyPem")
self.public_key_id = document.get("publicKey", {}).get("id")
# Sometimes the public key PEM is in a language construct?
if isinstance(self.public_key, dict):
self.public_key = self.public_key["@value"]
self.icon_uri = get_first_image_url(document.get("icon", None))
self.image_uri = get_first_image_url(document.get("image", None))
self.discoverable = document.get("toot:discoverable", True)
# Profile links/metadata
self.metadata = []
for attachment in get_list(document, "attachment"):
if (
attachment["type"] == "PropertyValue"
and "name" in attachment
and "value" in attachment
):
self.metadata.append(
{
"name": attachment["name"],
"value": FediverseHtmlParser(attachment["value"]).html,
}
)
# Now go do webfinger with that info to see if we can get a canonical domain
actor_url_parts = urlparse(self.actor_uri)
self.domain = Domain.get_remote_domain(actor_url_parts.hostname)
if self.username:
try:
webfinger_actor, webfinger_handle = self.fetch_webfinger(
f"{self.username}@{actor_url_parts.hostname}"
)
if webfinger_handle:
webfinger_username, webfinger_domain = webfinger_handle.split("@")
self.username = webfinger_username
self.domain = Domain.get_remote_domain(webfinger_domain)
except TryAgainLater:
# continue with original domain when webfinger times out
logger.info("WebFinger timed out: %s", self.actor_uri)
pass
except ValueError as exc:
logger.info(
"Can't parse WebFinger: %s %s",
exc.args[0],
self.actor_uri,
exc_info=exc,
)
return False
# Emojis (we need the domain so we do them here)
for tag in get_list(document, "tag"):
if tag["type"].lower() in ["toot:emoji", "emoji"]:
Emoji.by_ap_tag(self.domain, tag, create=True)
# Mark as fetched
self.fetched = timezone.now()
try:
with transaction.atomic():
# if we don't wrap this in its own transaction, the exception
# handler is guaranteed to fail
self.save()
except IntegrityError as e:
# See if we can fetch a PK and save there
if self.pk is None:
try:
other_row = Identity.objects.get(actor_uri=self.actor_uri)
except Identity.DoesNotExist:
raise ValueError(
f"Could not save Identity at end of actor fetch: {e}"
)
self.pk: int | None = other_row.pk
with transaction.atomic():
self.save()
# Fetch pinned posts in a followup task
if self.featured_collection_uri:
InboxMessage.create_internal(
{
"type": "SyncPins",
"identity": self.pk,
}
)
return True
### OpenGraph API ###
def to_opengraph_dict(self) -> dict:
return {
"og:title": f"{self.name} (@{self.handle})",
"og:type": "profile",
"og:description": self.summary,
"og:profile:username": self.handle,
"og:image:url": self.local_icon_url().absolute,
"og:image:height": 85,
"og:image:width": 85,
}
### Mastodon Client API ###
def to_mastodon_mention_json(self):
return {
"id": self.id,
"username": self.username or "",
"url": self.absolute_profile_uri() or "",
"acct": self.handle or "",
}
def to_mastodon_json(self, source=False, include_counts=True):
from activities.models import Emoji, Post
header_image = self.local_image_url()
missing = StaticAbsoluteUrl("img/missing.png").absolute
metadata_value_text = (
" ".join([m["value"] for m in self.metadata]) if self.metadata else ""
)
emojis = Emoji.emojis_from_content(
f"{self.name} {self.summary} {metadata_value_text}", self.domain
)
renderer = ContentRenderer(local=False)
result = {
"id": self.pk,
"username": self.username or "",
"acct": self.username if source else self.handle,
"url": self.absolute_profile_uri() or "",
"display_name": self.name or "",
"note": self.summary or "",
"avatar": self.local_icon_url().absolute,
"avatar_static": self.local_icon_url().absolute,
"header": header_image.absolute if header_image else missing,
"header_static": header_image.absolute if header_image else missing,
"locked": bool(self.manually_approves_followers),
"fields": (
[
{
"name": m["name"],
"value": renderer.render_identity_data(m["value"], self),
"verified_at": None,
}
for m in self.metadata
]
if self.metadata
else []
),
"emojis": [emoji.to_mastodon_json() for emoji in emojis],
"bot": self.actor_type.lower() in ["service", "application"],
"group": self.actor_type.lower() == "group",
"discoverable": self.discoverable,
"suspended": False,
"limited": False,
"created_at": format_ld_date(
self.created.replace(hour=0, minute=0, second=0, microsecond=0)
),
"last_status_at": None, # TODO: populate
"statuses_count": self.posts.count() if include_counts else 0,
"followers_count": self.inbound_follows.count() if include_counts else 0,
"following_count": self.outbound_follows.count() if include_counts else 0,
}
if source:
privacy_map = {
Post.Visibilities.public: "public",
Post.Visibilities.unlisted: "unlisted",
Post.Visibilities.local_only: "unlisted",
Post.Visibilities.followers: "private",
Post.Visibilities.mentioned: "direct",
}
result["source"] = {
"note": FediverseHtmlParser(self.summary).plain_text
if self.summary
else "",
"fields": (
[
{
"name": m["name"],
"value": FediverseHtmlParser(m["value"]).plain_text,
"verified_at": None,
}
for m in self.metadata
]
if self.metadata
else []
),
"privacy": privacy_map[
Config.load_identity(self).default_post_visibility
],
"sensitive": False,
"language": "unk",
"follow_requests_count": 0,
}
return result
### Cryptography ###
def signed_request(
self,
method: Literal["get", "post"],
uri: str,
body: dict | None = None,
):
"""
Performs a signed request on behalf of the System Actor.
"""
return HttpSignature.signed_request(
method=method,
uri=uri,
body=body,
private_key=self.private_key,
key_id=self.public_key_id,
)
def generate_keypair(self):
if not self.local:
raise ValueError("Cannot generate keypair for remote user")
self.private_key, self.public_key = RsaKeys.generate_keypair()
self.public_key_id = self.actor_uri + "#main-key"
self.save()
### Config ###
@cached_property
def config_identity(self) -> Config.IdentityOptions:
return Config.load_identity(self)
def lazy_config_value(self, key: str):
"""
Lazily load a config value for this Identity
"""
if key not in Config.IdentityOptions.__fields__:
raise KeyError(f"Undefined IdentityOption for {key}")
return lazy(lambda: getattr(self.config_identity, key))
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