forked-synapse/synapse/storage/stream.py

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2014-08-12 10:10:52 -04:00
# -*- coding: utf-8 -*-
# Copyright 2014 matrix.org
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
2014-08-12 10:10:52 -04:00
from ._base import SQLBaseStore
from .message import MessagesTable
from .feedback import FeedbackTable
from .roomdata import RoomDataTable
from .roommember import RoomMemberTable
import json
import logging
logger = logging.getLogger(__name__)
class StreamStore(SQLBaseStore):
def get_message_stream(self, user_id, from_key, to_key, room_id, limit=0,
with_feedback=False):
"""Get all messages for this user between the given keys.
Args:
user_id (str): The user who is requesting messages.
from_key (int): The ID to start returning results from (exclusive).
to_key (int): The ID to stop returning results (exclusive).
room_id (str): Gets messages only for this room. Can be None, in
which case all room messages will be returned.
Returns:
A tuple of rows (list of namedtuples), new_id(int)
"""
if with_feedback and room_id: # with fb MUST specify a room ID
return self._db_pool.runInteraction(
self._get_message_rows_with_feedback,
user_id, from_key, to_key, room_id, limit
)
else:
return self._db_pool.runInteraction(
self._get_message_rows,
user_id, from_key, to_key, room_id, limit
)
def _get_message_rows(self, txn, user_id, from_pkey, to_pkey, room_id,
limit):
# work out which rooms this user is joined in on and join them with
# the room id on the messages table, bounded by the specified pkeys
# get all messages where the *current* membership state is 'join' for
# this user in that room.
query = ("SELECT messages.* FROM messages WHERE ? IN"
+ " (SELECT membership from room_memberships WHERE user_id=?"
+ " AND room_id = messages.room_id ORDER BY id DESC LIMIT 1)")
query_args = ["join", user_id]
if room_id:
query += " AND messages.room_id=?"
query_args.append(room_id)
(query, query_args) = self._append_stream_operations(
"messages", query, query_args, from_pkey, to_pkey, limit=limit
)
cursor = txn.execute(query, query_args)
return self._as_events(cursor, MessagesTable, from_pkey)
def _get_message_rows_with_feedback(self, txn, user_id, from_pkey, to_pkey,
room_id, limit):
# this col represents the compressed feedback JSON as per spec
compressed_feedback_col = (
"'[' || group_concat('{\"sender_id\":\"' || f.fb_sender_id"
+ " || '\",\"feedback_type\":\"' || f.feedback_type"
+ " || '\",\"content\":' || f.content || '}') || ']'"
)
global_msg_id_join = ("f.room_id = messages.room_id"
+ " and f.msg_id = messages.msg_id"
+ " and messages.user_id = f.msg_sender_id")
select_query = (
"SELECT messages.*, f.content AS fb_content, f.fb_sender_id"
+ ", " + compressed_feedback_col + " AS compressed_fb"
+ " FROM messages LEFT JOIN feedback f ON " + global_msg_id_join)
current_membership_sub_query = (
"(SELECT membership from room_memberships rm"
+ " WHERE user_id=? AND room_id = rm.room_id"
+ " ORDER BY id DESC LIMIT 1)")
where = (" WHERE ? IN " + current_membership_sub_query
+ " AND messages.room_id=?")
query = select_query + where
query_args = ["join", user_id, room_id]
(query, query_args) = self._append_stream_operations(
"messages", query, query_args, from_pkey, to_pkey,
limit=limit, group_by=" GROUP BY messages.id "
)
cursor = txn.execute(query, query_args)
# convert the result set into events
entries = self.cursor_to_dict(cursor)
events = []
for entry in entries:
# TODO we should spec the cursor > event mapping somewhere else.
event = {}
straight_mappings = ["msg_id", "user_id", "room_id"]
for key in straight_mappings:
event[key] = entry[key]
event["content"] = json.loads(entry["content"])
if entry["compressed_fb"]:
event["feedback"] = json.loads(entry["compressed_fb"])
events.append(event)
latest_pkey = from_pkey if len(entries) == 0 else entries[-1]["id"]
return (events, latest_pkey)
def get_room_member_stream(self, user_id, from_key, to_key):
"""Get all room membership events for this user between the given keys.
Args:
user_id (str): The user who is requesting membership events.
from_key (int): The ID to start returning results from (exclusive).
to_key (int): The ID to stop returning results (exclusive).
Returns:
A tuple of rows (list of namedtuples), new_id(int)
"""
return self._db_pool.runInteraction(
self._get_room_member_rows, user_id, from_key, to_key
)
def _get_room_member_rows(self, txn, user_id, from_pkey, to_pkey):
# get all room membership events for rooms which the user is
# *currently* joined in on, or all invite events for this user.
current_membership_sub_query = (
"(SELECT membership FROM room_memberships"
+ " WHERE user_id=? AND room_id = rm.room_id"
+ " ORDER BY id DESC LIMIT 1)")
query = ("SELECT rm.* FROM room_memberships rm "
# all membership events for rooms you've currently joined.
+ " WHERE (? IN " + current_membership_sub_query
# all invite membership events for this user
+ " OR rm.membership=? AND user_id=?)"
+ " AND rm.id > ?")
query_args = ["join", user_id, "invite", user_id, from_pkey]
if to_pkey != -1:
query += " AND rm.id < ?"
query_args.append(to_pkey)
cursor = txn.execute(query, query_args)
return self._as_events(cursor, RoomMemberTable, from_pkey)
def get_feedback_stream(self, user_id, from_key, to_key, room_id, limit=0):
return self._db_pool.runInteraction(
self._get_feedback_rows,
user_id, from_key, to_key, room_id, limit
)
def _get_feedback_rows(self, txn, user_id, from_pkey, to_pkey, room_id,
limit):
# work out which rooms this user is joined in on and join them with
# the room id on the feedback table, bounded by the specified pkeys
# get all messages where the *current* membership state is 'join' for
# this user in that room.
query = (
"SELECT feedback.* FROM feedback WHERE ? IN "
+ "(SELECT membership from room_memberships WHERE user_id=?"
+ " AND room_id = feedback.room_id ORDER BY id DESC LIMIT 1)")
query_args = ["join", user_id]
if room_id:
query += " AND feedback.room_id=?"
query_args.append(room_id)
(query, query_args) = self._append_stream_operations(
"feedback", query, query_args, from_pkey, to_pkey, limit=limit
)
cursor = txn.execute(query, query_args)
return self._as_events(cursor, FeedbackTable, from_pkey)
def get_room_data_stream(self, user_id, from_key, to_key, room_id,
limit=0):
return self._db_pool.runInteraction(
self._get_room_data_rows,
user_id, from_key, to_key, room_id, limit
)
def _get_room_data_rows(self, txn, user_id, from_pkey, to_pkey, room_id,
limit):
# work out which rooms this user is joined in on and join them with
# the room id on the feedback table, bounded by the specified pkeys
# get all messages where the *current* membership state is 'join' for
# this user in that room.
query = (
"SELECT room_data.* FROM room_data WHERE ? IN "
+ "(SELECT membership from room_memberships WHERE user_id=?"
+ " AND room_id = room_data.room_id ORDER BY id DESC LIMIT 1)")
query_args = ["join", user_id]
if room_id:
query += " AND room_data.room_id=?"
query_args.append(room_id)
(query, query_args) = self._append_stream_operations(
"room_data", query, query_args, from_pkey, to_pkey, limit=limit
)
cursor = txn.execute(query, query_args)
return self._as_events(cursor, RoomDataTable, from_pkey)
def _append_stream_operations(self, table_name, query, query_args,
from_pkey, to_pkey, limit=None,
group_by=""):
LATEST_ROW = -1
order_by = ""
if to_pkey > from_pkey:
if from_pkey != LATEST_ROW:
# e.g. from=5 to=9 >> from 5 to 9 >> id>5 AND id<9
query += (" AND %s.id > ? AND %s.id < ?" %
(table_name, table_name))
query_args.append(from_pkey)
query_args.append(to_pkey)
else:
# e.g. from=-1 to=5 >> from now to 5 >> id>5 ORDER BY id DESC
query += " AND %s.id > ? " % table_name
order_by = "ORDER BY id DESC"
query_args.append(to_pkey)
elif from_pkey > to_pkey:
if to_pkey != LATEST_ROW:
# from=9 to=5 >> from 9 to 5 >> id>5 AND id<9 ORDER BY id DESC
query += (" AND %s.id > ? AND %s.id < ? " %
(table_name, table_name))
order_by = "ORDER BY id DESC"
query_args.append(to_pkey)
query_args.append(from_pkey)
else:
# from=5 to=-1 >> from 5 to now >> id>5
query += " AND %s.id > ?" % table_name
query_args.append(from_pkey)
query += group_by + order_by
if limit and limit > 0:
query += " LIMIT ?"
query_args.append(str(limit))
return (query, query_args)
def _as_events(self, cursor, table, from_pkey):
data_entries = table.decode_results(cursor)
last_pkey = from_pkey
if data_entries:
last_pkey = data_entries[-1].id
events = [
entry.as_event(self.event_factory).get_dict()
for entry in data_entries
]
return (events, last_pkey)