87 lines
2.6 KiB
Go
87 lines
2.6 KiB
Go
|
// 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 storage
|
||
|
|
|
||
|
|
import (
|
||
|
|
"context"
|
||
|
|
"database/sql"
|
||
|
|
)
|
||
|
|
|
||
|
|
const transactionsSchema = `
|
||
|
|
-- The transactions table holds transaction IDs with sender's info and event ID it belongs to.
|
||
|
|
-- This table is used by roomserver to prevent reprocessing of events.
|
||
|
|
CREATE TABLE IF NOT EXISTS roomserver_transactions (
|
||
|
|
-- The transaction ID of the event.
|
||
|
|
transaction_id TEXT NOT NULL,
|
||
|
|
-- The device ID of the originating transaction.
|
||
|
|
device_id TEXT NOT NULL,
|
||
|
|
-- User ID of the sender who authored the event
|
||
|
|
user_id TEXT NOT NULL,
|
||
|
|
-- Event ID corresponding to the transaction
|
||
|
|
-- Required to return event ID to client on a duplicate request.
|
||
|
|
event_id TEXT NOT NULL,
|
||
|
|
-- A transaction ID is unique for a user and device
|
||
|
|
-- This automatically creates an index.
|
||
|
|
PRIMARY KEY (transaction_id, device_id, user_id)
|
||
|
|
);
|
||
|
|
`
|
||
|
|
const insertTransactionSQL = "" +
|
||
|
|
"INSERT INTO roomserver_transactions (transaction_id, device_id, user_id, event_id)" +
|
||
|
|
" VALUES ($1, $2, $3, $4)"
|
||
|
|
|
||
|
|
const selectTransactionEventIDSQL = "" +
|
||
|
|
"SELECT event_id FROM roomserver_transactions" +
|
||
|
|
" WHERE transaction_id = $1 AND device_id = $2 AND user_id = $3"
|
||
|
|
|
||
|
|
type transactionStatements struct {
|
||
|
|
insertTransactionStmt *sql.Stmt
|
||
|
|
selectTransactionEventIDStmt *sql.Stmt
|
||
|
|
}
|
||
|
|
|
||
|
|
func (s *transactionStatements) prepare(db *sql.DB) (err error) {
|
||
|
|
_, err = db.Exec(transactionsSchema)
|
||
|
|
if err != nil {
|
||
|
|
return
|
||
|
|
}
|
||
|
|
|
||
|
|
return statementList{
|
||
|
|
{&s.insertTransactionStmt, insertTransactionSQL},
|
||
|
|
{&s.selectTransactionEventIDStmt, selectTransactionEventIDSQL},
|
||
|
|
}.prepare(db)
|
||
|
|
}
|
||
|
|
|
||
|
|
func (s *transactionStatements) insertTransaction(
|
||
|
|
ctx context.Context,
|
||
|
|
transactionID string,
|
||
|
|
deviceID string,
|
||
|
|
userID string,
|
||
|
|
eventID string,
|
||
|
|
) (err error) {
|
||
|
|
_, err = s.insertTransactionStmt.ExecContext(
|
||
|
|
ctx, transactionID, deviceID, userID, eventID,
|
||
|
|
)
|
||
|
|
return
|
||
|
|
}
|
||
|
|
|
||
|
|
func (s *transactionStatements) selectTransactionEventID(
|
||
|
|
ctx context.Context,
|
||
|
|
transactionID string,
|
||
|
|
deviceID string,
|
||
|
|
userID string,
|
||
|
|
) (eventID string, err error) {
|
||
|
|
err = s.selectTransactionEventIDStmt.QueryRowContext(
|
||
|
|
ctx, transactionID, deviceID, userID,
|
||
|
|
).Scan(&eventID)
|
||
|
|
return
|
||
|
|
}
|