149 lines
5.0 KiB
Python
149 lines
5.0 KiB
Python
from celery import Celery
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from app import app as flaskapp
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from app import db
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from model import Session, Account, TwitterArchive, Post
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import lib.twitter
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from twitter import TwitterError
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from urllib.error import URLError
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from datetime import timedelta, datetime
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from zipfile import ZipFile
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from io import BytesIO, TextIOWrapper
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import json
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from kombu import Queue
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import random
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app = Celery('tasks', broker=flaskapp.config['CELERY_BROKER'], task_serializer='pickle')
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app.conf.task_queues = (
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Queue('default', routing_key='celery'),
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Queue('high_prio', routing_key='high'),
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Queue('higher_prio', routing_key='higher'),
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)
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app.conf.task_default_queue = 'default'
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app.conf.task_default_exchange = 'celery'
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app.conf.task_default_exchange_type = 'direct'
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@app.task(autoretry_for=(TwitterError, URLError))
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def fetch_acc(id, cursor=None):
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acc = Account.query.get(id)
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print(f'fetching {acc}')
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try:
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if(acc.service == 'twitter'):
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cursor = lib.twitter.fetch_acc(acc, cursor, **flaskapp.config.get_namespace("TWITTER_"))
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if cursor:
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fetch_acc.si(id, cursor).apply_async()
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finally:
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db.session.rollback()
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acc.last_fetch = db.func.now()
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db.session.commit()
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@app.task
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def queue_fetch_for_most_stale_accounts(min_staleness=timedelta(minutes=5), limit=20):
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accs = Account.query\
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.filter(Account.last_fetch < db.func.now() - min_staleness)\
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.order_by(db.asc(Account.last_fetch))\
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.limit(limit)
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for acc in accs:
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fetch_acc.s(acc.id).delay()
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acc.touch_fetch()
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db.session.commit()
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@app.task
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def import_twitter_archive(archive_id):
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ta = TwitterArchive.query.get(archive_id)
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with ZipFile(BytesIO(ta.body), 'r') as zipfile:
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files = [filename for filename in zipfile.namelist() if filename.startswith('data/js/tweets/') and filename.endswith('.js')]
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files.sort()
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ta.chunks = len(files)
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db.session.commit()
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for filename in files:
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import_twitter_archive_month.s(archive_id, filename).apply_async()
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@app.task
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def import_twitter_archive_month(archive_id, month_path):
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ta = TwitterArchive.query.get(archive_id)
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try:
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with ZipFile(BytesIO(ta.body), 'r') as zipfile:
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with TextIOWrapper(zipfile.open(month_path, 'r')) as f:
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# seek past header
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f.readline()
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tweets = json.load(f)
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for tweet in tweets:
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post = lib.twitter.tweet_to_post(tweet)
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existing_post = db.session.query(Post).get(post.id)
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if post.author_id != ta.account_id \
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or existing_post and existing_post.author_id != ta.account_id:
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raise Exception("Shenanigans!")
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post = db.session.merge(post)
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ta.chunks_successful = TwitterArchive.chunks_successful + 1
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db.session.commit()
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except Exception as e:
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db.session.rollback()
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ta.chunks_failed = TwitterArchive.chunks_failed + 1
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db.session.commit()
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raise e
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@app.task
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def periodic_cleanup():
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Session.query.filter(Session.updated_at < (db.func.now() - timedelta(hours=48))).\
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delete(synchronize_session=False)
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TwitterArchive.query.filter(TwitterArchive.updated_at < (db.func.now() - timedelta(days=7))).\
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delete(synchronize_session=False)
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db.session.commit()
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@app.task
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def queue_deletes():
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eligible_accounts = Account.query.filter(Account.policy_enabled == True).\
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filter(Account.last_delete + Account.policy_delete_every < db.func.now())
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for account in eligible_accounts:
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delete_from_account.s(account.id).apply_async()
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@app.task
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def delete_from_account(account_id):
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account = Account.query.get(account_id)
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latest_n_posts = db.session.query(Post.id).with_parent(account).order_by(db.desc(Post.created_at)).limit(account.policy_keep_latest)
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posts = Post.query.with_parent(account).\
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filter(Post.created_at + account.policy_keep_younger <= db.func.now()).\
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filter(~Post.id.in_(latest_n_posts)).\
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order_by(db.func.random()).limit(100).all()
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if account.service == 'twitter':
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posts = lib.twitter.refresh_posts(posts)
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eligible = list((post for post in posts if not account.policy_keep_favourites or not post.favourite))
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if eligible:
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if account.policy_delete_every == timedelta(0):
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print("deleting all {} eligible posts for {}".format(len(eligible), account))
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for post in eligible:
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lib.twitter.delete(post)
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else:
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post = random.choice(list((post for post in posts if not account.policy_keep_favourites or not post.favourite)))
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print("deleting {}".format(post))
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lib.twitter.delete(post)
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account.last_delete = db.func.now()
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db.session.commit()
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app.add_periodic_task(6*60*60, periodic_cleanup)
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app.add_periodic_task(45, queue_fetch_for_most_stale_accounts)
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app.add_periodic_task(45, queue_deletes)
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if __name__ == '__main__':
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app.worker_main()
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