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dendrite/syncapi/storage/postgres/memberships_table.go
Till 05cafbd197
Implement history visibility on /messages, /context, /sync (#2511)
* Add possibility to set history_visibility and user AccountType

* Add new DB queries

* Add actual history_visibility changes for /messages

* Add passing tests

* Extract check function

* Cleanup

* Cleanup

* Fix build on 386

* Move ApplyHistoryVisibilityFilter to internal

* Move queries to topology table

* Add filtering to /sync and /context
Some cleanup

* Add passing tests; Remove failing tests :(

* Re-add passing tests

* Move filtering to own function to avoid duplication

* Re-add passing test

* Use newly added GMSL HistoryVisibility

* Update gomatrixserverlib

* Set the visibility when creating events

* Default to shared history visibility

* Remove unused query

* Update history visibility checks to use gmsl
Update tests

* Remove unused statement

* Update migrations to set "correct" history visibility

* Add method to fetch the membership at a given event

* Tweaks and logging

* Use actual internal rsAPI, default to shared visibility in tests

* Revert "Move queries to topology table"

This reverts commit 4f0d41be9c.

* Remove noise/unneeded code

* More cleanup

* Try to optimize database requests

* Fix imports

* PR peview fixes/changes

* Move setting history visibility to own migration, be more restrictive

* Fix unit tests

* Lint

* Fix missing entries

* Tweaks for incremental syncs

* Adapt generic changes

Co-authored-by: Neil Alexander <neilalexander@users.noreply.github.com>
Co-authored-by: kegsay <kegan@matrix.org>
2022-08-11 18:23:35 +02:00

156 lines
5.4 KiB
Go

// Copyright 2021 The Matrix.org Foundation C.I.C.
//
// 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.
package postgres
import (
"context"
"database/sql"
"fmt"
"github.com/lib/pq"
"github.com/matrix-org/dendrite/internal"
"github.com/matrix-org/dendrite/internal/sqlutil"
"github.com/matrix-org/dendrite/syncapi/storage/tables"
"github.com/matrix-org/dendrite/syncapi/types"
"github.com/matrix-org/gomatrixserverlib"
)
// The memberships table is designed to track the last time that
// the user was a given state. This allows us to find out the
// most recent time that a user was invited to, joined or left
// a room, either by choice or otherwise. This is important for
// building history visibility.
const membershipsSchema = `
CREATE TABLE IF NOT EXISTS syncapi_memberships (
-- The 'room_id' key for the state event.
room_id TEXT NOT NULL,
-- The state event ID
user_id TEXT NOT NULL,
-- The status of the membership
membership TEXT NOT NULL,
-- The event ID that last changed the membership
event_id TEXT NOT NULL,
-- The stream position of the change
stream_pos BIGINT NOT NULL,
-- The topological position of the change in the room
topological_pos BIGINT NOT NULL,
-- Unique index
CONSTRAINT syncapi_memberships_unique UNIQUE (room_id, user_id, membership)
);
`
const upsertMembershipSQL = "" +
"INSERT INTO syncapi_memberships (room_id, user_id, membership, event_id, stream_pos, topological_pos)" +
" VALUES ($1, $2, $3, $4, $5, $6)" +
" ON CONFLICT ON CONSTRAINT syncapi_memberships_unique" +
" DO UPDATE SET event_id = $4, stream_pos = $5, topological_pos = $6"
const selectMembershipCountSQL = "" +
"SELECT COUNT(*) FROM (" +
" SELECT DISTINCT ON (room_id, user_id) room_id, user_id, membership FROM syncapi_memberships WHERE room_id = $1 AND stream_pos <= $2 ORDER BY room_id, user_id, stream_pos DESC" +
") t WHERE t.membership = $3"
const selectHeroesSQL = "" +
"SELECT DISTINCT user_id FROM syncapi_memberships WHERE room_id = $1 AND user_id != $2 AND membership = ANY($3) LIMIT 5"
const selectMembershipBeforeSQL = "" +
"SELECT membership, topological_pos FROM syncapi_memberships WHERE room_id = $1 and user_id = $2 AND topological_pos <= $3 ORDER BY topological_pos DESC LIMIT 1"
type membershipsStatements struct {
upsertMembershipStmt *sql.Stmt
selectMembershipCountStmt *sql.Stmt
selectHeroesStmt *sql.Stmt
selectMembershipForUserStmt *sql.Stmt
}
func NewPostgresMembershipsTable(db *sql.DB) (tables.Memberships, error) {
s := &membershipsStatements{}
_, err := db.Exec(membershipsSchema)
if err != nil {
return nil, err
}
return s, sqlutil.StatementList{
{&s.upsertMembershipStmt, upsertMembershipSQL},
{&s.selectMembershipCountStmt, selectMembershipCountSQL},
{&s.selectHeroesStmt, selectHeroesSQL},
{&s.selectMembershipForUserStmt, selectMembershipBeforeSQL},
}.Prepare(db)
}
func (s *membershipsStatements) UpsertMembership(
ctx context.Context, txn *sql.Tx, event *gomatrixserverlib.HeaderedEvent,
streamPos, topologicalPos types.StreamPosition,
) error {
membership, err := event.Membership()
if err != nil {
return fmt.Errorf("event.Membership: %w", err)
}
_, err = sqlutil.TxStmt(txn, s.upsertMembershipStmt).ExecContext(
ctx,
event.RoomID(),
*event.StateKey(),
membership,
event.EventID(),
streamPos,
topologicalPos,
)
return err
}
func (s *membershipsStatements) SelectMembershipCount(
ctx context.Context, txn *sql.Tx, roomID, membership string, pos types.StreamPosition,
) (count int, err error) {
stmt := sqlutil.TxStmt(txn, s.selectMembershipCountStmt)
err = stmt.QueryRowContext(ctx, roomID, pos, membership).Scan(&count)
return
}
func (s *membershipsStatements) SelectHeroes(
ctx context.Context, txn *sql.Tx, roomID, userID string, memberships []string,
) (heroes []string, err error) {
stmt := sqlutil.TxStmt(txn, s.selectHeroesStmt)
var rows *sql.Rows
rows, err = stmt.QueryContext(ctx, roomID, userID, pq.StringArray(memberships))
if err != nil {
return
}
defer internal.CloseAndLogIfError(ctx, rows, "SelectHeroes: rows.close() failed")
var hero string
for rows.Next() {
if err = rows.Scan(&hero); err != nil {
return
}
heroes = append(heroes, hero)
}
return heroes, rows.Err()
}
// SelectMembershipForUser returns the membership of the user before and including the given position. If no membership can be found
// returns "leave", the topological position and no error. If an error occurs, other than sql.ErrNoRows, returns that and an empty
// string as the membership.
func (s *membershipsStatements) SelectMembershipForUser(
ctx context.Context, txn *sql.Tx, roomID, userID string, pos int64,
) (membership string, topologyPos int, err error) {
stmt := sqlutil.TxStmt(txn, s.selectMembershipForUserStmt)
err = stmt.QueryRowContext(ctx, roomID, userID, pos).Scan(&membership, &topologyPos)
if err != nil {
if err == sql.ErrNoRows {
return "leave", 0, nil
}
return "", 0, err
}
return membership, topologyPos, nil
}