185 lines
6.5 KiB
Python
185 lines
6.5 KiB
Python
# -*- coding: utf-8 -*-
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# Copyright 2016 OpenMarket Ltd
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#
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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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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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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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import logging
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import ujson
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from twisted.internet import defer
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from ._base import SQLBaseStore
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logger = logging.getLogger(__name__)
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class DeviceInboxStore(SQLBaseStore):
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@defer.inlineCallbacks
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def add_messages_to_device_inbox(self, messages_by_user_then_device):
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"""
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Args:
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messages_by_user_and_device(dict):
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Dictionary of user_id to device_id to message.
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Returns:
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A deferred stream_id that resolves when the messages have been
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inserted.
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"""
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def select_devices_txn(txn, user_id, devices):
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if not devices:
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return []
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sql = (
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"SELECT user_id, device_id FROM devices"
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" WHERE user_id = ? AND device_id IN ("
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+ ",".join("?" * len(devices))
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+ ")"
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)
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# TODO: Maybe this needs to be done in batches if there are
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# too many local devices for a given user.
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args = [user_id] + devices
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txn.execute(sql, args)
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return [tuple(row) for row in txn.fetchall()]
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def add_messages_to_device_inbox_txn(txn, stream_id):
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local_users_and_devices = set()
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for user_id, messages_by_device in messages_by_user_then_device.items():
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local_users_and_devices.update(
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select_devices_txn(txn, user_id, messages_by_device.keys())
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)
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sql = (
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"INSERT INTO device_inbox"
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" (user_id, device_id, stream_id, message_json)"
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" VALUES (?,?,?,?)"
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)
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rows = []
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for user_id, messages_by_device in messages_by_user_then_device.items():
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for device_id, message in messages_by_device.items():
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message_json = ujson.dumps(message)
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# Only insert into the local inbox if the device exists on
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# this server
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if (user_id, device_id) in local_users_and_devices:
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rows.append((user_id, device_id, stream_id, message_json))
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txn.executemany(sql, rows)
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with self._device_inbox_id_gen.get_next() as stream_id:
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yield self.runInteraction(
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"add_messages_to_device_inbox",
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add_messages_to_device_inbox_txn,
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stream_id
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)
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defer.returnValue(self._device_inbox_id_gen.get_current_token())
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def get_new_messages_for_device(
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self, user_id, device_id, last_stream_id, current_stream_id, limit=100
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):
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"""
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Args:
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user_id(str): The recipient user_id.
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device_id(str): The recipient device_id.
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current_stream_id(int): The current position of the to device
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message stream.
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Returns:
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Deferred ([dict], int): List of messages for the device and where
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in the stream the messages got to.
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"""
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def get_new_messages_for_device_txn(txn):
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sql = (
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"SELECT stream_id, message_json FROM device_inbox"
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" WHERE user_id = ? AND device_id = ?"
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" AND ? < stream_id AND stream_id <= ?"
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" ORDER BY stream_id ASC"
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" LIMIT ?"
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)
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txn.execute(sql, (
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user_id, device_id, last_stream_id, current_stream_id, limit
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))
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messages = []
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for row in txn.fetchall():
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stream_pos = row[0]
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messages.append(ujson.loads(row[1]))
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if len(messages) < limit:
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stream_pos = current_stream_id
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return (messages, stream_pos)
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return self.runInteraction(
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"get_new_messages_for_device", get_new_messages_for_device_txn,
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)
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def delete_messages_for_device(self, user_id, device_id, up_to_stream_id):
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"""
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Args:
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user_id(str): The recipient user_id.
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device_id(str): The recipient device_id.
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up_to_stream_id(int): Where to delete messages up to.
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Returns:
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A deferred that resolves when the messages have been deleted.
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"""
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def delete_messages_for_device_txn(txn):
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sql = (
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"DELETE FROM device_inbox"
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" WHERE user_id = ? AND device_id = ?"
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" AND stream_id <= ?"
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)
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txn.execute(sql, (user_id, device_id, up_to_stream_id))
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return self.runInteraction(
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"delete_messages_for_device", delete_messages_for_device_txn
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)
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def get_all_new_device_messages(self, last_pos, current_pos, limit):
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"""
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Args:
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last_pos(int):
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current_pos(int):
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limit(int):
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Returns:
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A deferred list of rows from the device inbox
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"""
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if last_pos == current_pos:
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return defer.succeed([])
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def get_all_new_device_messages_txn(txn):
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sql = (
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"SELECT stream_id FROM device_inbox"
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" WHERE ? < stream_id AND stream_id <= ?"
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" GROUP BY stream_id"
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" ORDER BY stream_id ASC"
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" LIMIT ?"
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)
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txn.execute(sql, (last_pos, current_pos, limit))
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stream_ids = txn.fetchall()
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if not stream_ids:
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return []
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max_stream_id_in_limit = stream_ids[-1]
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sql = (
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"SELECT stream_id, user_id, device_id, message_json"
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" FROM device_inbox"
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" WHERE ? < stream_id AND stream_id <= ?"
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" ORDER BY stream_id ASC"
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)
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txn.execute(sql, (last_pos, max_stream_id_in_limit))
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return txn.fetchall()
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return self.runInteraction(
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"get_all_new_device_messages", get_all_new_device_messages_txn
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)
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def get_to_device_stream_token(self):
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return self._device_inbox_id_gen.get_current_token()
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