147 lines
5.5 KiB
Python
147 lines
5.5 KiB
Python
from datetime import datetime
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from app import db
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from twitter import Twitter, OAuth
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import secrets
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from lib import decompose_interval
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from datetime import timedelta
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class TimestampMixin(object):
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created_at = db.Column(db.DateTime, server_default=db.func.now(), nullable=False)
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updated_at = db.Column(db.DateTime, server_default=db.func.now(), onupdate=db.func.now(), nullable=False)
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def touch(self):
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self.updated_at=db.func.now()
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class RemoteIDMixin(object):
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@property
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def service(self):
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if not self.id:
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return None
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return self.id.split(":")[0]
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@property
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def twitter_id(self):
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if not self.id:
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return None
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if self.service != "twitter":
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raise Exception("tried to get twitter id for a {} {}".format(self.service, type(self)))
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return self.id.split(":")[1]
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@twitter_id.setter
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def twitter_id(self, id):
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self.id = "twitter:{}".format(id)
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@decompose_interval('policy_delete_every')
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@decompose_interval('policy_keep_younger')
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class Account(TimestampMixin, RemoteIDMixin):
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__tablename__ = 'accounts'
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id = db.Column(db.String, primary_key=True)
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policy_enabled = db.Column(db.Boolean, server_default='FALSE', nullable=False)
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policy_keep_latest = db.Column(db.Integer, server_default='100', nullable=False)
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policy_keep_favourites = db.Column(db.Boolean, server_default='TRUE', nullable=False)
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policy_delete_every = db.Column(db.Interval, server_default='30 minutes', nullable=False)
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policy_keep_younger = db.Column(db.Interval, server_default='365 days', nullable=False)
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display_name = db.Column(db.String)
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screen_name = db.Column(db.String)
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avatar_url = db.Column(db.String)
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reported_post_count = db.Column(db.Integer)
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last_fetch = db.Column(db.DateTime, server_default='epoch')
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last_delete = db.Column(db.DateTime, server_default='epoch')
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def touch_fetch(self):
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self.last_fetch = db.func.now()
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def touch_delete(self):
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self.last_delete = db.func.now()
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@db.validates('policy_keep_younger', 'policy_delete_every')
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def validate_intervals(self, key, value):
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if not (value == timedelta(0) or value >= timedelta(minutes=1)):
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value = timedelta(minutes=1)
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return value
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# backref: tokens
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# backref: twitter_archives
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# backref: posts
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def __repr__(self):
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return f"<Account({self.id}, {self.screen_name}, {self.display_name})>"
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def post_count(self):
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return Post.query.with_parent(self).count()
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def estimate_eligible_for_delete(self):
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"""
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this is an estimation because we do not know if favourite status has changed since last time a post was refreshed
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and it is unfeasible to refresh every single post every time we need to know how many posts are eligible to delete
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"""
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latest_n_posts = db.session.query(Post.id).with_parent(self).order_by(db.desc(Post.created_at)).limit(self.policy_keep_latest)
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query = Post.query.with_parent(self).\
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filter(Post.created_at + self.policy_keep_younger <= db.func.now()).\
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filter(~Post.id.in_(latest_n_posts))
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if(self.policy_keep_favourites):
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query = query.filter_by(favourite = False)
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return query.count()
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class Account(Account, db.Model):
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pass
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class OAuthToken(db.Model, TimestampMixin):
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__tablename__ = 'oauth_tokens'
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token = db.Column(db.String, primary_key=True)
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token_secret = db.Column(db.String, nullable=False)
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account_id = db.Column(db.String, db.ForeignKey('accounts.id', ondelete='CASCADE', onupdate='CASCADE'), nullable=True)
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account = db.relationship(Account, backref=db.backref('tokens', order_by=lambda: db.desc(OAuthToken.created_at)))
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# note: account_id is nullable here because we don't know what account a token is for
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# until we call /account/verify_credentials with it
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class Session(db.Model, TimestampMixin):
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__tablename__ = 'sessions'
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id = db.Column(db.String, primary_key=True, default=lambda: secrets.token_urlsafe())
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account_id = db.Column(db.String, db.ForeignKey('accounts.id', ondelete='CASCADE', onupdate='CASCADE'), nullable=False)
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account = db.relationship(Account, lazy='joined')
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class Post(db.Model, TimestampMixin, RemoteIDMixin):
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__tablename__ = 'posts'
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id = db.Column(db.String, primary_key=True)
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body = db.Column(db.String)
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author_id = db.Column(db.String, db.ForeignKey('accounts.id', ondelete='CASCADE', onupdate='CASCADE'), nullable=False)
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author = db.relationship(Account,
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backref=db.backref('posts', order_by=lambda: db.desc(Post.created_at)))
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favourite = db.Column(db.Boolean, server_default='FALSE', nullable=False)
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def __repr__(self):
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snippet = self.body
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if len(snippet) > 20:
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snippet = snippet[:19] + "✂"
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return '<Post ({}, "{}", Author: {})>'.format(self.id, snippet, self.author_id)
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class TwitterArchive(db.Model, TimestampMixin):
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__tablename__ = 'twitter_archives'
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id = db.Column(db.Integer, primary_key=True)
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account_id = db.Column(db.String, db.ForeignKey('accounts.id', onupdate='CASCADE', ondelete='CASCADE'), nullable=False)
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account = db.relationship(Account, backref=db.backref('twitter_archives', order_by=lambda: db.desc(TwitterArchive.id)))
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body = db.deferred(db.Column(db.LargeBinary, nullable=False))
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chunks = db.Column(db.Integer)
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chunks_successful = db.Column(db.Integer, server_default='0', nullable=False)
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chunks_failed = db.Column(db.Integer, server_default='0', nullable=False)
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