contentdb/app/models/threads.py

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# ContentDB
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# Copyright (C) 2018-21 rubenwardy
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#
# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU Affero General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU Affero General Public License for more details.
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#
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# You should have received a copy of the GNU Affero General Public License
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# along with this program. If not, see <https://www.gnu.org/licenses/>.
import datetime
from flask import url_for
from . import db
from .users import Permission, UserRank
from .packages import Package
watchers = db.Table("watchers",
db.Column("user_id", db.Integer, db.ForeignKey("user.id"), primary_key=True),
db.Column("thread_id", db.Integer, db.ForeignKey("thread.id"), primary_key=True)
)
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class Thread(db.Model):
id = db.Column(db.Integer, primary_key=True)
package_id = db.Column(db.Integer, db.ForeignKey("package.id"), nullable=True)
package = db.relationship("Package", foreign_keys=[package_id], back_populates="threads")
is_review_thread = db.relationship("Package", foreign_keys=[Package.review_thread_id], back_populates="review_thread")
review_id = db.Column(db.Integer, db.ForeignKey("package_review.id"), nullable=True)
review = db.relationship("PackageReview", foreign_keys=[review_id], cascade="all, delete")
author_id = db.Column(db.Integer, db.ForeignKey("user.id"), nullable=False)
author = db.relationship("User", back_populates="threads", foreign_keys=[author_id])
title = db.Column(db.String(100), nullable=False)
private = db.Column(db.Boolean, server_default="0", nullable=False)
locked = db.Column(db.Boolean, server_default="0", nullable=False)
created_at = db.Column(db.DateTime, nullable=False, default=datetime.datetime.utcnow)
replies = db.relationship("ThreadReply", back_populates="thread", lazy="dynamic",
order_by=db.asc("thread_reply_id"), cascade="all, delete, delete-orphan")
watchers = db.relationship("User", secondary=watchers, backref="watching")
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def getViewURL(self):
return url_for("threads.view", id=self.id, _external=False)
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def getSubscribeURL(self):
return url_for("threads.subscribe", id=self.id)
def getUnsubscribeURL(self):
return url_for("threads.unsubscribe", id=self.id)
def checkPerm(self, user, perm):
if not user.is_authenticated:
return perm == Permission.SEE_THREAD and not self.private
if type(perm) == str:
perm = Permission[perm]
elif type(perm) != Permission:
raise Exception("Unknown permission given to Thread.checkPerm()")
isMaintainer = user == self.author or (self.package is not None and self.package.author == user)
if self.package:
isMaintainer = isMaintainer or user in self.package.maintainers
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canSee = not self.private or isMaintainer or user.rank.atLeast(UserRank.APPROVER)
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if perm == Permission.SEE_THREAD:
return canSee
elif perm == Permission.COMMENT_THREAD:
return canSee and (not self.locked or user.rank.atLeast(UserRank.MODERATOR))
elif perm == Permission.LOCK_THREAD:
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return user.rank.atLeast(UserRank.MODERATOR)
elif perm == Permission.DELETE_THREAD:
from app.utils.models import get_system_user
return (self.author == get_system_user() and self.package and
user in self.package.maintainers) or user.rank.atLeast(UserRank.MODERATOR)
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else:
raise Exception("Permission {} is not related to threads".format(perm.name))
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def get_latest_reply(self):
return ThreadReply.query.filter_by(thread_id=self.id).order_by(db.desc(ThreadReply.id)).first()
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class ThreadReply(db.Model):
id = db.Column(db.Integer, primary_key=True)
thread_id = db.Column(db.Integer, db.ForeignKey("thread.id"), nullable=False)
thread = db.relationship("Thread", back_populates="replies", foreign_keys=[thread_id])
comment = db.Column(db.String(2000), nullable=False)
author_id = db.Column(db.Integer, db.ForeignKey("user.id"), nullable=False)
author = db.relationship("User", back_populates="replies", foreign_keys=[author_id])
created_at = db.Column(db.DateTime, nullable=False, default=datetime.datetime.utcnow)
def checkPerm(self, user, perm):
if not user.is_authenticated:
return False
if type(perm) == str:
perm = Permission[perm]
elif type(perm) != Permission:
raise Exception("Unknown permission given to ThreadReply.checkPerm()")
if perm == Permission.EDIT_REPLY:
return user == self.author and user.rank.atLeast(UserRank.MEMBER) and not self.thread.locked
elif perm == Permission.DELETE_REPLY:
return user.rank.atLeast(UserRank.MODERATOR) and self.thread.replies[0] != self
else:
raise Exception("Permission {} is not related to threads".format(perm.name))
class PackageReview(db.Model):
id = db.Column(db.Integer, primary_key=True)
package_id = db.Column(db.Integer, db.ForeignKey("package.id"), nullable=True)
package = db.relationship("Package", foreign_keys=[package_id], back_populates="reviews")
created_at = db.Column(db.DateTime, nullable=False, default=datetime.datetime.utcnow)
author_id = db.Column(db.Integer, db.ForeignKey("user.id"), nullable=False)
author = db.relationship("User", foreign_keys=[author_id], back_populates="reviews")
recommends = db.Column(db.Boolean, nullable=False)
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thread = db.relationship("Thread", uselist=False, back_populates="review")
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def asSign(self):
return 1 if self.recommends else -1
def getEditURL(self):
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return self.package.getURL("packages.review")
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def getDeleteURL(self):
return url_for("packages.delete_review",
author=self.package.author.username,
name=self.package.name)