forget-cancellare-vecchi-toot/libforget/mastodon.py

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from mastodon import Mastodon
from mastodon.Mastodon import MastodonAPIError,\
MastodonNetworkError,\
MastodonNotFoundError,\
MastodonRatelimitError,\
MastodonUnauthorizedError
from model import MastodonApp, Account, OAuthToken, Post, MastodonInstance
from requests import head
from app import db, sentry
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from libforget.exceptions import TemporaryError
from functools import lru_cache
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def get_or_create_app(instance_url, callback, website):
instance_url = instance_url
app = MastodonApp.query.get(instance_url)
try:
head('https://{}'.format(instance_url)).raise_for_status()
proto = 'https'
except Exception:
head('http://{}'.format(instance_url)).raise_for_status()
proto = 'http'
if not app:
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client_id, client_secret = Mastodon.create_app(
'forget',
scopes=('read', 'write'),
api_base_url='{}://{}'.format(proto, instance_url),
redirect_uris=callback,
website=website,
)
app = MastodonApp()
app.instance = instance_url
app.client_id = client_id
app.client_secret = client_secret
app.protocol = proto
return app
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def anonymous_api(app):
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return Mastodon(
app.client_id,
client_secret=app.client_secret,
api_base_url='{}://{}'.format(app.protocol, app.instance),
)
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def login_url(app, callback):
return anonymous_api(app).auth_request_url(
redirect_uris=callback,
scopes=('read', 'write',)
)
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def receive_code(code, app, callback):
api = anonymous_api(app)
access_token = api.log_in(
code=code,
scopes=('read', 'write'),
redirect_uri=callback,
)
remote_acc = api.account_verify_credentials()
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acc = account_from_api_object(remote_acc, app.instance)
acc = db.session.merge(acc)
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token = OAuthToken(token=access_token)
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token = db.session.merge(token)
token.account = acc
return token
@lru_cache()
def get_api_for_acc(account):
app = MastodonApp.query.get(account.mastodon_instance)
for token in account.tokens:
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api = Mastodon(
app.client_id,
client_secret=app.client_secret,
api_base_url='{}://{}'.format(app.protocol, app.instance),
access_token=token.token,
ratelimit_method='throw',
)
try:
# api.verify_credentials()
# doesnt error even if the token is revoked lol
# https://github.com/tootsuite/mastodon/issues/4637
# so we have to do this:
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api.timeline()
if api.ratelimit_remaining / api.ratelimit_limit < 1/4:
raise TemporaryError("Rate limit too low")
return api
except MastodonUnauthorizedError as e:
if sentry:
sentry.captureMessage(
'Mastodon auth revoked or incorrect',
extra=locals())
db.session.delete(token)
db.session.commit()
continue
except MastodonAPIError as e:
raise TemporaryError(e)
except (MastodonNetworkError,
MastodonRatelimitError) as e:
raise TemporaryError(e)
raise TemporaryError('No access to account {}'.format(account))
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def fetch_posts(acc, max_id, since_id):
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api = get_api_for_acc(acc)
try:
newacc = account_from_api_object(
api.account_verify_credentials(), acc.mastodon_instance)
acc = db.session.merge(newacc)
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kwargs = dict(limit=40)
if max_id:
kwargs['max_id'] = max_id
if since_id:
kwargs['since_id'] = since_id
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statuses = api.account_statuses(acc.mastodon_id, **kwargs)
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return [post_from_api_object(status, acc.mastodon_instance) for status in statuses]
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except (MastodonAPIError,
MastodonNetworkError,
MastodonRatelimitError) as e:
raise TemporaryError(e)
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def post_from_api_object(obj, instance):
return Post(
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mastodon_instance=instance,
mastodon_id=obj['id'],
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favourite=obj['favourited'],
has_media=('media_attachments' in obj
and bool(obj['media_attachments'])),
created_at=obj['created_at'],
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author_id=account_from_api_object(obj['account'], instance).id,
direct=obj['visibility'] == 'direct',
favourites=obj['favourites_count'],
reblogs=obj['reblogs_count'],
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is_reblog=obj['reblog'] is not None,
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)
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def account_from_api_object(obj, instance):
return Account(
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mastodon_instance=instance,
mastodon_id=obj['id'],
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screen_name='{}@{}'.format(obj['username'], instance),
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display_name=obj['display_name'],
avatar_url=obj['avatar'],
reported_post_count=obj['statuses_count'],
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)
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def refresh_posts(posts):
acc = posts[0].author
api = get_api_for_acc(acc)
new_posts = list()
with db.session.no_autoflush:
for post in posts:
print('Refreshing {}'.format(post))
try:
status = api.status(post.mastodon_id)
new_post = db.session.merge(
post_from_api_object(status, post.mastodon_instance))
new_post.touch()
new_posts.append(new_post)
except MastodonNotFoundError:
db.session.delete(post)
except (MastodonAPIError,
MastodonNetworkError,
MastodonRatelimitError) as e:
raise TemporaryError(e)
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return new_posts
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def delete(post):
api = get_api_for_acc(post.author)
try:
api.status_delete(post.mastodon_id)
db.session.delete(post)
except (MastodonAPIError,
MastodonNetworkError,
MastodonRatelimitError) as e:
raise TemporaryError(e)
def suggested_instances(limit=5, min_popularity=5, blacklist=tuple()):
return tuple((ins.instance for ins in (
MastodonInstance.query
.filter(MastodonInstance.popularity > min_popularity)
.filter(~MastodonInstance.instance.in_(blacklist))
.order_by(db.desc(MastodonInstance.popularity),
MastodonInstance.instance)
.limit(limit).all())))