dendrite/keyserver/storage/sqlite3/deltas/2022012016470000_key_changes.go

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// Copyright 2022 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 deltas
import (
"database/sql"
"fmt"
"github.com/matrix-org/dendrite/internal/sqlutil"
"github.com/pressly/goose"
)
func LoadFromGoose() {
goose.AddMigration(UpRefactorKeyChanges, DownRefactorKeyChanges)
}
func LoadRefactorKeyChanges(m *sqlutil.Migrations) {
m.AddMigration(UpRefactorKeyChanges, DownRefactorKeyChanges)
}
func UpRefactorKeyChanges(tx *sql.Tx) error {
// start counting from the last max offset, else 0.
var maxOffset int64
var userID string
_ = tx.QueryRow(`SELECT user_id, MAX(log_offset) FROM keyserver_key_changes GROUP BY user_id`).Scan(&userID, &maxOffset)
_, err := tx.Exec(`
-- make the new table
DROP TABLE IF EXISTS keyserver_key_changes;
CREATE TABLE IF NOT EXISTS keyserver_key_changes (
change_id INTEGER PRIMARY KEY AUTOINCREMENT,
-- The key owner
user_id TEXT NOT NULL,
UNIQUE (user_id)
);
`)
if err != nil {
return fmt.Errorf("failed to execute upgrade: %w", err)
}
// to start counting from maxOffset, insert a row with that value
if userID != "" {
_, err = tx.Exec(`INSERT INTO keyserver_key_changes(change_id, user_id) VALUES($1, $2)`, maxOffset, userID)
return err
}
return nil
}
func DownRefactorKeyChanges(tx *sql.Tx) error {
_, err := tx.Exec(`
-- Drop all data and revert back, we can't keep the data as Kafka offsets determine the numbers
DROP TABLE IF EXISTS keyserver_key_changes;
CREATE TABLE IF NOT EXISTS keyserver_key_changes (
partition BIGINT NOT NULL,
offset BIGINT NOT NULL,
-- The key owner
user_id TEXT NOT NULL,
UNIQUE (partition, offset)
);
`)
if err != nil {
return fmt.Errorf("failed to execute downgrade: %w", err)
}
return nil
}