mirror of
https://github.com/1f349/dendrite.git
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183 lines
5.4 KiB
Go
183 lines
5.4 KiB
Go
// Copyright 2021 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 msc2946
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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"
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"github.com/matrix-org/dendrite/internal/sqlutil"
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"github.com/matrix-org/dendrite/setup/config"
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"github.com/matrix-org/gomatrixserverlib"
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)
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var (
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relTypes = map[string]int{
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ConstSpaceChildEventType: 1,
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ConstSpaceParentEventType: 2,
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}
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)
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type Database interface {
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// StoreReference persists a child or parent space mapping.
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StoreReference(ctx context.Context, he *gomatrixserverlib.HeaderedEvent) error
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// References returns all events which have the given roomID as a parent or child space.
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References(ctx context.Context, roomID string) ([]*gomatrixserverlib.HeaderedEvent, error)
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}
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type DB struct {
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db *sql.DB
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writer sqlutil.Writer
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insertEdgeStmt *sql.Stmt
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selectEdgesStmt *sql.Stmt
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}
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// NewDatabase loads the database for msc2836
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func NewDatabase(dbOpts *config.DatabaseOptions) (Database, error) {
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if dbOpts.ConnectionString.IsPostgres() {
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return newPostgresDatabase(dbOpts)
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}
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return newSQLiteDatabase(dbOpts)
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}
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func newPostgresDatabase(dbOpts *config.DatabaseOptions) (Database, error) {
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d := DB{
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writer: sqlutil.NewDummyWriter(),
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}
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var err error
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if d.db, err = sqlutil.Open(dbOpts); err != nil {
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return nil, err
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}
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_, err = d.db.Exec(`
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CREATE TABLE IF NOT EXISTS msc2946_edges (
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room_version TEXT NOT NULL,
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-- the room ID of the event, the source of the arrow
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source_room_id TEXT NOT NULL,
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-- the target room ID, the arrow destination
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dest_room_id TEXT NOT NULL,
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-- the kind of relation, either child or parent (1,2)
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rel_type SMALLINT NOT NULL,
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event_json TEXT NOT NULL,
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CONSTRAINT msc2946_edges_uniq UNIQUE (source_room_id, dest_room_id, rel_type)
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);
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`)
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if err != nil {
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return nil, err
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}
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if d.insertEdgeStmt, err = d.db.Prepare(`
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INSERT INTO msc2946_edges(room_version, source_room_id, dest_room_id, rel_type, event_json)
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VALUES($1, $2, $3, $4, $5)
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ON CONFLICT ON CONSTRAINT msc2946_edges_uniq DO UPDATE SET event_json = $5
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`); err != nil {
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return nil, err
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}
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if d.selectEdgesStmt, err = d.db.Prepare(`
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SELECT room_version, event_json FROM msc2946_edges
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WHERE source_room_id = $1 OR dest_room_id = $2
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`); err != nil {
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return nil, err
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}
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return &d, err
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}
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func newSQLiteDatabase(dbOpts *config.DatabaseOptions) (Database, error) {
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d := DB{
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writer: sqlutil.NewExclusiveWriter(),
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}
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var err error
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if d.db, err = sqlutil.Open(dbOpts); err != nil {
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return nil, err
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}
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_, err = d.db.Exec(`
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CREATE TABLE IF NOT EXISTS msc2946_edges (
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room_version TEXT NOT NULL,
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-- the room ID of the event, the source of the arrow
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source_room_id TEXT NOT NULL,
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-- the target room ID, the arrow destination
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dest_room_id TEXT NOT NULL,
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-- the kind of relation, either child or parent (1,2)
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rel_type SMALLINT NOT NULL,
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event_json TEXT NOT NULL,
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UNIQUE (source_room_id, dest_room_id, rel_type)
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);
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`)
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if err != nil {
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return nil, err
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}
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if d.insertEdgeStmt, err = d.db.Prepare(`
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INSERT INTO msc2946_edges(room_version, source_room_id, dest_room_id, rel_type, event_json)
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VALUES($1, $2, $3, $4, $5)
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ON CONFLICT (source_room_id, dest_room_id, rel_type) DO UPDATE SET event_json = $5
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`); err != nil {
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return nil, err
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}
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if d.selectEdgesStmt, err = d.db.Prepare(`
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SELECT room_version, event_json FROM msc2946_edges
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WHERE source_room_id = $1 OR dest_room_id = $2
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`); err != nil {
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return nil, err
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}
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return &d, err
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}
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func (d *DB) StoreReference(ctx context.Context, he *gomatrixserverlib.HeaderedEvent) error {
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target := SpaceTarget(he)
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if target == "" {
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return nil // malformed event
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}
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relType := relTypes[he.Type()]
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_, err := d.insertEdgeStmt.ExecContext(ctx, he.RoomVersion, he.RoomID(), target, relType, he.JSON())
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return err
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}
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func (d *DB) References(ctx context.Context, roomID string) ([]*gomatrixserverlib.HeaderedEvent, error) {
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rows, err := d.selectEdgesStmt.QueryContext(ctx, roomID, roomID)
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if err != nil {
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return nil, err
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}
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defer internal.CloseAndLogIfError(ctx, rows, "failed to close References")
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refs := make([]*gomatrixserverlib.HeaderedEvent, 0)
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for rows.Next() {
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var roomVer string
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var jsonBytes []byte
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if err := rows.Scan(&roomVer, &jsonBytes); err != nil {
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return nil, err
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}
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ev, err := gomatrixserverlib.NewEventFromTrustedJSON(jsonBytes, false, gomatrixserverlib.RoomVersion(roomVer))
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if err != nil {
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return nil, err
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}
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he := ev.Headered(gomatrixserverlib.RoomVersion(roomVer))
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refs = append(refs, he)
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}
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return refs, nil
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}
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// SpaceTarget returns the destination room ID for the space event. This is either a child or a parent
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// depending on the event type.
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func SpaceTarget(he *gomatrixserverlib.HeaderedEvent) string {
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if he.StateKey() == nil {
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return "" // no-op
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}
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switch he.Type() {
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case ConstSpaceParentEventType:
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return *he.StateKey()
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case ConstSpaceChildEventType:
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return *he.StateKey()
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}
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return ""
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}
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