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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"
"github.com/matrix-org/dendrite/internal"
"github.com/matrix-org/dendrite/internal/sqlutil"
"github.com/matrix-org/dendrite/roomserver/storage/shared"
"github.com/matrix-org/dendrite/roomserver/storage/tables"
)
const roomAliasesSchema = `
-- Stores room aliases and room IDs they refer to
CREATE TABLE IF NOT EXISTS roomserver_room_aliases (
-- Alias of the room
alias TEXT NOT NULL PRIMARY KEY,
-- Room ID the alias refers to
room_id TEXT NOT NULL,
-- User ID of the creator of this alias
creator_id TEXT NOT NULL
);
CREATE INDEX IF NOT EXISTS roomserver_room_id_idx ON roomserver_room_aliases(room_id);
`
const insertRoomAliasSQL = "" +
"INSERT INTO roomserver_room_aliases (alias, room_id, creator_id) VALUES ($1, $2, $3)"
const selectRoomIDFromAliasSQL = "" +
"SELECT room_id FROM roomserver_room_aliases WHERE alias = $1"
const selectAliasesFromRoomIDSQL = "" +
"SELECT alias FROM roomserver_room_aliases WHERE room_id = $1"
const selectCreatorIDFromAliasSQL = "" +
"SELECT creator_id FROM roomserver_room_aliases WHERE alias = $1"
const deleteRoomAliasSQL = "" +
"DELETE FROM roomserver_room_aliases WHERE alias = $1"
type roomAliasesStatements struct {
insertRoomAliasStmt *sql.Stmt
selectRoomIDFromAliasStmt *sql.Stmt
selectAliasesFromRoomIDStmt *sql.Stmt
selectCreatorIDFromAliasStmt *sql.Stmt
deleteRoomAliasStmt *sql.Stmt
}
func NewPostgresRoomAliasesTable(db *sql.DB) (tables.RoomAliases, error) {
s := &roomAliasesStatements{}
_, err := db.Exec(roomAliasesSchema)
if err != nil {
return nil, err
}
return s, shared.StatementList{
{&s.insertRoomAliasStmt, insertRoomAliasSQL},
{&s.selectRoomIDFromAliasStmt, selectRoomIDFromAliasSQL},
{&s.selectAliasesFromRoomIDStmt, selectAliasesFromRoomIDSQL},
{&s.selectCreatorIDFromAliasStmt, selectCreatorIDFromAliasSQL},
{&s.deleteRoomAliasStmt, deleteRoomAliasSQL},
}.Prepare(db)
}
func (s *roomAliasesStatements) InsertRoomAlias(
ctx context.Context, txn *sql.Tx, alias string, roomID string, creatorUserID string,
) (err error) {
stmt := sqlutil.TxStmt(txn, s.insertRoomAliasStmt)
_, err = stmt.ExecContext(ctx, alias, roomID, creatorUserID)
return
}
func (s *roomAliasesStatements) SelectRoomIDFromAlias(
ctx context.Context, alias string,
) (roomID string, err error) {
err = s.selectRoomIDFromAliasStmt.QueryRowContext(ctx, alias).Scan(&roomID)
if err == sql.ErrNoRows {
return "", nil
}
return
}
func (s *roomAliasesStatements) SelectAliasesFromRoomID(
ctx context.Context, roomID string,
) ([]string, error) {
rows, err := s.selectAliasesFromRoomIDStmt.QueryContext(ctx, roomID)
if err != nil {
return nil, err
}
defer internal.CloseAndLogIfError(ctx, rows, "selectAliasesFromRoomID: rows.close() failed")
var aliases []string
for rows.Next() {
var alias string
if err = rows.Scan(&alias); err != nil {
return nil, err
}
aliases = append(aliases, alias)
}
return aliases, rows.Err()
}
func (s *roomAliasesStatements) SelectCreatorIDFromAlias(
ctx context.Context, alias string,
) (creatorID string, err error) {
err = s.selectCreatorIDFromAliasStmt.QueryRowContext(ctx, alias).Scan(&creatorID)
if err == sql.ErrNoRows {
return "", nil
}
return
}
func (s *roomAliasesStatements) DeleteRoomAlias(
ctx context.Context, txn *sql.Tx, alias string,
) (err error) {
stmt := sqlutil.TxStmt(txn, s.deleteRoomAliasStmt)
_, err = stmt.ExecContext(ctx, alias)
return
}
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