116 lines
4.1 KiB
Python
116 lines
4.1 KiB
Python
"""
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Copyright 2024-2026 ReplyPier
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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"""
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from sqlalchemy.exc import IntegrityError
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from sqlalchemy.orm import Session
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from uuid import UUID
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from typing import List, Sequence
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from app.models.fcm_token import FCMToken
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from app.core.logger import get_logger
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logger = get_logger(__name__)
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class FCMTokenRepository:
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"""Web-push tokens, one row per signed-in browser."""
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def __init__(self, db: Session):
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self.db = db
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def register(self, user_id: UUID, token: str) -> bool:
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"""Store `token` for `user_id`, creating or reassigning its row.
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FCM hands the same token back to a given browser install no matter who
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is signed in, so an existing row is moved to the current user rather
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than duplicated — otherwise a shared browser would keep receiving the
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previous account's notifications.
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"""
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try:
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if self._claim(user_id, token):
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return True
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# Lost the insert race: the client posts on every app load, so two
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# tabs opening together both see no row and both insert. Re-run
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# against the row the winner committed instead of failing the
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# request and leaving this browser unregistered for the session.
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self.db.rollback()
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return self._claim(user_id, token)
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except Exception as e:
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logger.error(f"Error registering FCM token: {str(e)}")
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self.db.rollback()
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return False
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def _claim(self, user_id: UUID, token: str) -> bool:
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"""Point `token` at `user_id`. False if a concurrent insert won."""
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existing = self.db.query(FCMToken).filter(
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FCMToken.token == token).first()
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if existing:
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if existing.user_id != user_id:
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logger.info(
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f"Reassigning FCM token from user {existing.user_id} to {user_id}")
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existing.user_id = user_id
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else:
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self.db.add(FCMToken(user_id=user_id, token=token))
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try:
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self.db.commit()
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return True
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except IntegrityError:
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return False
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def get_tokens(self, user_id: UUID) -> List[str]:
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"""Every device token registered for a user."""
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try:
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rows = self.db.query(FCMToken.token).filter(
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FCMToken.user_id == user_id).all()
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return [row.token for row in rows]
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except Exception as e:
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logger.error(f"Error getting FCM tokens: {str(e)}")
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return []
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def remove(self, user_id: UUID, token: str) -> bool:
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"""Drop a single device's token — used on logout.
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Scoped to the owner so a stolen token can't be used to silence someone
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else's notifications.
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"""
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try:
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deleted = self.db.query(FCMToken).filter(
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FCMToken.user_id == user_id,
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FCMToken.token == token,
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).delete(synchronize_session=False)
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self.db.commit()
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return deleted > 0
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except Exception as e:
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logger.error(f"Error removing FCM token: {str(e)}")
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self.db.rollback()
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return False
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def remove_tokens(self, tokens: Sequence[str]) -> int:
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"""Drop tokens FCM has told us are dead. Returns the number removed."""
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if not tokens:
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return 0
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try:
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deleted = self.db.query(FCMToken).filter(
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FCMToken.token.in_(list(tokens))).delete(synchronize_session=False)
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self.db.commit()
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return deleted
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except Exception as e:
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logger.error(f"Error pruning FCM tokens: {str(e)}")
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self.db.rollback()
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return 0
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