activitypub/activitypub/manager.py

113 wiersze
3.5 KiB
Python

import uuid
class Manager():
"""
Manager class that ties together ActivityPub objects, defaults,
and a database.
>>> from activitypub import Manager
>>> from activitypub.database import DummyDatabase
>>> db = DummyDatabase()
>>> manager = Manager(database=db)
>>>
"""
def __init__(self, context=None, defaults=None, database=None):
from .classes import ActivityPubBase
self.callback = lambda box, activity_id: None
self.context = context
self.defaults = defaults or self.make_defaults()
self.defaults["$UUID"] = lambda: str(uuid.uuid4())
self.database = database
def make_wrapper(manager, class_):
def wrapper(*args, **kwargs):
return ActivityPubBase.CLASSES[class_](manager, *args, **kwargs)
return wrapper
for class_ in ActivityPubBase.CLASSES:
setattr(self, class_, make_wrapper(self, class_))
def make_defaults(self):
"""
A default field can refer to itself, which means that it needs a
value to begin with.
>>> m = Manager()
>>> n = m.Note(attributedTo="alyssa", id="23")
>>> n.to_dict()
{'@context': 'https://www.w3.org/ns/activitystreams', 'attributedTo': 'alyssa', 'id': 'alyssa/note/23', 'type': 'Note'}
A default can be a $-variable, or the name of a "Class.field_name".
"""
return {
"$SCHEME": "https",
"$HOST": "example.com",
"Person.id": "$SCHEME://$HOST/$id",
"Person.likes": "$id/likes",
"Person.following": "$id/following",
"Person.followers": "$id/followers",
"Person.liked": "$id/liked",
"Person.inbox": "$id/inbox",
"Person.outbox": "$id/outbox",
"Person.url": "$id",
"Note.id": "$attributedTo/note/$id",
}
def from_dict(self, data):
from .classes import ActivityPubBase
return ActivityPubBase.from_dict(data)
def to_list(self, item):
if isinstance(item, list):
return item
return [item]
def on_post_to_box(self, box, activity):
"""
manager.on_post_to_box("inbox", activity)
"""
self.database.activities.insert_one(
{
"box": box,
"activity": activity.to_dict(),
"type": self.to_list(activity.type),
"remote_id": activity.id,
"meta": {
"undo": False,
"deleted": False
},
}
)
self.callback(box, activity.id)
def delete_reply(self, actor, note):
if note.inReplyTo:
self.database.activities.update_one(
{"activity.object.id": note.inReplyTo},
{"$inc": {"meta.count_reply": -1, "meta.count_direct_reply": -1}},
)
def set_callback(self, callback):
self.callback = callback
def get_followers(self, remote_id):
q = {
"remote_id": remote_id,
"box": "inbox",
"type": "follow",
"meta.undo": False,
}
return [doc["activity"]["actor"]
for doc in self.database.activities.find(q)]
def get_following(self, remote_id):
q = {
"remote_id": remote_id,
"box": "outbox",
"type": "follow",
"meta.undo": False,
}
return [doc["activity"]["object"]
for doc in self.database.activities.find(q)]