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// Copyright 2017-2018 New Vector Ltd
// Copyright 2019-2020 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"
"encoding/json"
"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"
)
const inviteEventsSchema = `
CREATE TABLE IF NOT EXISTS syncapi_invite_events (
id BIGINT PRIMARY KEY DEFAULT nextval('syncapi_stream_id'),
event_id TEXT NOT NULL,
room_id TEXT NOT NULL,
target_user_id TEXT NOT NULL,
headered_event_json TEXT NOT NULL,
deleted BOOL NOT NULL
);
-- For looking up the invites for a given user.
CREATE INDEX IF NOT EXISTS syncapi_invites_target_user_id_idx
ON syncapi_invite_events (target_user_id, id);
-- For deleting old invites
CREATE INDEX IF NOT EXISTS syncapi_invites_event_id_idx
ON syncapi_invite_events (event_id);
`
const insertInviteEventSQL = "" +
"INSERT INTO syncapi_invite_events (" +
" room_id, event_id, target_user_id, headered_event_json, deleted" +
") VALUES ($1, $2, $3, $4, FALSE) RETURNING id"
const deleteInviteEventSQL = "" +
"UPDATE syncapi_invite_events SET deleted=TRUE, id=nextval('syncapi_stream_id') WHERE event_id = $1 AND deleted=FALSE RETURNING id"
const selectInviteEventsInRangeSQL = "" +
"SELECT id, room_id, headered_event_json, deleted FROM syncapi_invite_events" +
" WHERE target_user_id = $1 AND id > $2 AND id <= $3" +
" ORDER BY id DESC"
const selectMaxInviteIDSQL = "" +
"SELECT MAX(id) FROM syncapi_invite_events"
const purgeInvitesSQL = "" +
"DELETE FROM syncapi_invite_events WHERE room_id = $1"
type inviteEventsStatements struct {
insertInviteEventStmt *sql.Stmt
selectInviteEventsInRangeStmt *sql.Stmt
deleteInviteEventStmt *sql.Stmt
selectMaxInviteIDStmt *sql.Stmt
purgeInvitesStmt *sql.Stmt
}
func NewPostgresInvitesTable(db *sql.DB) (tables.Invites, error) {
s := &inviteEventsStatements{}
_, err := db.Exec(inviteEventsSchema)
if err != nil {
return nil, err
}
return s, sqlutil.StatementList{
{&s.insertInviteEventStmt, insertInviteEventSQL},
{&s.selectInviteEventsInRangeStmt, selectInviteEventsInRangeSQL},
{&s.deleteInviteEventStmt, deleteInviteEventSQL},
{&s.selectMaxInviteIDStmt, selectMaxInviteIDSQL},
{&s.purgeInvitesStmt, purgeInvitesSQL},
}.Prepare(db)
}
func (s *inviteEventsStatements) InsertInviteEvent(
ctx context.Context, txn *sql.Tx, inviteEvent *gomatrixserverlib.HeaderedEvent,
) (streamPos types.StreamPosition, err error) {
var headeredJSON []byte
headeredJSON, err = json.Marshal(inviteEvent)
if err != nil {
return
}
err = sqlutil.TxStmt(txn, s.insertInviteEventStmt).QueryRowContext(
ctx,
inviteEvent.RoomID(),
inviteEvent.EventID(),
*inviteEvent.StateKey(),
headeredJSON,
).Scan(&streamPos)
return
}
func (s *inviteEventsStatements) DeleteInviteEvent(
ctx context.Context, txn *sql.Tx, inviteEventID string,
) (sp types.StreamPosition, err error) {
stmt := sqlutil.TxStmt(txn, s.deleteInviteEventStmt)
err = stmt.QueryRowContext(ctx, inviteEventID).Scan(&sp)
return
}
// selectInviteEventsInRange returns a map of room ID to invite event for the
// active invites for the target user ID in the supplied range.
func (s *inviteEventsStatements) SelectInviteEventsInRange(
ctx context.Context, txn *sql.Tx, targetUserID string, r types.Range,
) (map[string]*gomatrixserverlib.HeaderedEvent, map[string]*gomatrixserverlib.HeaderedEvent, types.StreamPosition, error) {
var lastPos types.StreamPosition
stmt := sqlutil.TxStmt(txn, s.selectInviteEventsInRangeStmt)
rows, err := stmt.QueryContext(ctx, targetUserID, r.Low(), r.High())
if err != nil {
return nil, nil, lastPos, err
}
defer internal.CloseAndLogIfError(ctx, rows, "selectInviteEventsInRange: rows.close() failed")
result := map[string]*gomatrixserverlib.HeaderedEvent{}
retired := map[string]*gomatrixserverlib.HeaderedEvent{}
for rows.Next() {
var (
id types.StreamPosition
roomID string
eventJSON []byte
deleted bool
)
if err = rows.Scan(&id, &roomID, &eventJSON, &deleted); err != nil {
return nil, nil, lastPos, err
}
if id > lastPos {
lastPos = id
}
// if we have seen this room before, it has a higher stream position and hence takes priority
// because the query is ORDER BY id DESC so drop them
_, isRetired := retired[roomID]
_, isInvited := result[roomID]
if isRetired || isInvited {
continue
}
var event *gomatrixserverlib.HeaderedEvent
if err := json.Unmarshal(eventJSON, &event); err != nil {
return nil, nil, lastPos, err
}
if deleted {
retired[roomID] = event
} else {
result[roomID] = event
}
}
if lastPos == 0 {
lastPos = r.To
}
return result, retired, lastPos, rows.Err()
}
func (s *inviteEventsStatements) SelectMaxInviteID(
ctx context.Context, txn *sql.Tx,
) (id int64, err error) {
var nullableID sql.NullInt64
stmt := sqlutil.TxStmt(txn, s.selectMaxInviteIDStmt)
err = stmt.QueryRowContext(ctx).Scan(&nullableID)
if nullableID.Valid {
id = nullableID.Int64
}
return
}
func (s *inviteEventsStatements) PurgeInvites(
ctx context.Context, txn *sql.Tx, roomID string,
) error {
_, err := sqlutil.TxStmt(txn, s.purgeInvitesStmt).ExecContext(ctx, roomID)
return err
}
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