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https://github.com/matrix-org/dendrite.git
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143 lines
4 KiB
Go
143 lines
4 KiB
Go
// Copyright 2019 Alex Chen
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package storage
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import (
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"context"
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"database/sql"
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"github.com/lib/pq"
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"github.com/matrix-org/dendrite/common"
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"github.com/matrix-org/dendrite/roomserver/types"
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)
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const redactionsSchema = `
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-- The redactions table holds redactions.
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CREATE TABLE IF NOT EXISTS roomserver_redactions (
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-- Local numeric ID for the redaction event.
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event_nid BIGINT PRIMARY KEY,
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-- String ID for the redacted event.
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redacts TEXT NOT NULL,
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-- Whether the redaction has been validated.
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-- For use of the "accept first, validate later" strategy for rooms >= v3.
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-- Should always be TRUE for rooms before v3.
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validated BOOLEAN NOT NULL
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);
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CREATE INDEX IF NOT EXISTS roomserver_redactions_redacts ON roomserver_redactions(redacts);
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`
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const insertRedactionSQL = "" +
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"INSERT INTO roomserver_redactions (event_nid, redacts, validated)" +
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" VALUES ($1, $2, $3)"
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const bulkSelectRedactionSQL = "" +
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"SELECT event_nid, redacts, validated FROM roomserver_redactions" +
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" WHERE redacts = ANY($1)"
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const bulkUpdateValidationStatusSQL = "" +
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" UPDATE roomserver_redactions SET validated = $2 WHERE event_nid = ANY($1)"
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type redactionStatements struct {
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insertRedactionStmt *sql.Stmt
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bulkSelectRedactionStmt *sql.Stmt
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bulkUpdateValidationStatusStmt *sql.Stmt
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}
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// redactedToRedactionMap is a map in the form map[redactedEventID]redactionEventNID.
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type redactedToRedactionMap map[string]types.EventNID
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func (s *redactionStatements) prepare(db *sql.DB) (err error) {
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_, err = db.Exec(redactionsSchema)
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if err != nil {
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return
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}
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return statementList{
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{&s.insertRedactionStmt, insertRedactionSQL},
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{&s.bulkSelectRedactionStmt, bulkSelectRedactionSQL},
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{&s.bulkUpdateValidationStatusStmt, bulkUpdateValidationStatusSQL},
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}.prepare(db)
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}
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func (s *redactionStatements) insertRedaction(
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ctx context.Context,
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txn *sql.Tx,
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eventNID types.EventNID,
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redactsEventID string,
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validated bool,
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) error {
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stmt := common.TxStmt(txn, s.insertRedactionStmt)
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_, err := stmt.ExecContext(ctx, int64(eventNID), redactsEventID, validated)
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return err
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}
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// bulkSelectRedaction returns the redactions for the given event IDs.
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// Return values validated and unvalidated are both map[redactedEventID]redactedByNID.
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func (s *redactionStatements) bulkSelectRedaction(
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ctx context.Context,
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txn *sql.Tx,
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eventIDs []string,
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) (
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validated, unvalidated redactedToRedactionMap,
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err error,
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) {
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stmt := common.TxStmt(txn, s.bulkSelectRedactionStmt)
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rows, err := stmt.QueryContext(ctx, pq.StringArray(eventIDs))
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if err != nil {
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return nil, nil, err
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}
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defer rows.Close() // nolint: errcheck
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validated = make(map[string]types.EventNID)
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unvalidated = make(map[string]types.EventNID)
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var (
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redactedByNID types.EventNID
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redactedEventID string
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isValidated bool
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)
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for rows.Next() {
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if err = rows.Scan(
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&redactedByNID,
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&redactedEventID,
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&isValidated,
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); err != nil {
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return nil, nil, err
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}
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if isValidated {
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validated[redactedEventID] = redactedByNID
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} else {
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unvalidated[redactedEventID] = redactedByNID
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}
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}
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if err = rows.Err(); err != nil {
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return nil, nil, err
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}
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return validated, unvalidated, nil
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}
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func (s *redactionStatements) bulkUpdateValidationStatus(
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ctx context.Context,
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txn *sql.Tx,
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eventNIDs []types.EventNID,
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newStatus bool,
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) error {
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stmt := common.TxStmt(txn, s.bulkUpdateValidationStatusStmt)
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_, err := stmt.ExecContext(ctx, eventNIDsAsArray(eventNIDs), newStatus)
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return err
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}
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