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