122 lines
4.3 KiB
Go
122 lines
4.3 KiB
Go
// Copyright 2020 The Matrix.org Foundation C.I.C.
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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 postgres
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import (
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"context"
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"database/sql"
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"github.com/matrix-org/dendrite/internal/sqlutil"
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"github.com/matrix-org/dendrite/roomserver/storage/tables"
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)
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const redactionsSchema = `
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-- Stores information about the redacted state of events.
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-- We need to track redactions rather than blindly updating the event JSON table on receipt of a redaction
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-- because we might receive the redaction BEFORE we receive the event which it redacts (think backfill).
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CREATE TABLE IF NOT EXISTS roomserver_redactions (
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redaction_event_id TEXT PRIMARY KEY,
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redacts_event_id TEXT NOT NULL,
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-- Initially FALSE, set to TRUE when the redaction has been validated according to rooms v3+ spec
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-- https://matrix.org/docs/spec/rooms/v3#authorization-rules-for-events
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validated BOOLEAN NOT NULL
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);
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CREATE INDEX IF NOT EXISTS roomserver_redactions_redacts_event_id ON roomserver_redactions(redacts_event_id);
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`
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const insertRedactionSQL = "" +
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"INSERT INTO roomserver_redactions (redaction_event_id, redacts_event_id, validated)" +
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" VALUES ($1, $2, $3)" +
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" ON CONFLICT DO NOTHING"
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const selectRedactionInfoByRedactionEventIDSQL = "" +
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"SELECT redaction_event_id, redacts_event_id, validated FROM roomserver_redactions" +
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" WHERE redaction_event_id = $1"
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const selectRedactionInfoByEventBeingRedactedSQL = "" +
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"SELECT redaction_event_id, redacts_event_id, validated FROM roomserver_redactions" +
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" WHERE redacts_event_id = $1"
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const markRedactionValidatedSQL = "" +
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" UPDATE roomserver_redactions SET validated = $2 WHERE redaction_event_id = $1"
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type redactionStatements struct {
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insertRedactionStmt *sql.Stmt
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selectRedactionInfoByRedactionEventIDStmt *sql.Stmt
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selectRedactionInfoByEventBeingRedactedStmt *sql.Stmt
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markRedactionValidatedStmt *sql.Stmt
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}
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func createRedactionsTable(db *sql.DB) error {
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_, err := db.Exec(redactionsSchema)
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return err
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}
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func prepareRedactionsTable(db *sql.DB) (tables.Redactions, error) {
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s := &redactionStatements{}
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return s, sqlutil.StatementList{
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{&s.insertRedactionStmt, insertRedactionSQL},
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{&s.selectRedactionInfoByRedactionEventIDStmt, selectRedactionInfoByRedactionEventIDSQL},
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{&s.selectRedactionInfoByEventBeingRedactedStmt, selectRedactionInfoByEventBeingRedactedSQL},
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{&s.markRedactionValidatedStmt, markRedactionValidatedSQL},
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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, txn *sql.Tx, info tables.RedactionInfo,
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) error {
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stmt := sqlutil.TxStmt(txn, s.insertRedactionStmt)
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_, err := stmt.ExecContext(ctx, info.RedactionEventID, info.RedactsEventID, info.Validated)
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return err
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}
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func (s *redactionStatements) SelectRedactionInfoByRedactionEventID(
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ctx context.Context, txn *sql.Tx, redactionEventID string,
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) (info *tables.RedactionInfo, err error) {
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info = &tables.RedactionInfo{}
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stmt := sqlutil.TxStmt(txn, s.selectRedactionInfoByRedactionEventIDStmt)
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err = stmt.QueryRowContext(ctx, redactionEventID).Scan(
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&info.RedactionEventID, &info.RedactsEventID, &info.Validated,
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)
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if err == sql.ErrNoRows {
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info = nil
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err = nil
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}
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return
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}
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func (s *redactionStatements) SelectRedactionInfoByEventBeingRedacted(
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ctx context.Context, txn *sql.Tx, eventID string,
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) (info *tables.RedactionInfo, err error) {
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info = &tables.RedactionInfo{}
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stmt := sqlutil.TxStmt(txn, s.selectRedactionInfoByEventBeingRedactedStmt)
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err = stmt.QueryRowContext(ctx, eventID).Scan(
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&info.RedactionEventID, &info.RedactsEventID, &info.Validated,
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)
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if err == sql.ErrNoRows {
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info = nil
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err = nil
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}
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return
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}
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func (s *redactionStatements) MarkRedactionValidated(
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ctx context.Context, txn *sql.Tx, redactionEventID string, validated bool,
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) error {
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stmt := sqlutil.TxStmt(txn, s.markRedactionValidatedStmt)
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_, err := stmt.ExecContext(ctx, redactionEventID, validated)
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return err
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}
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