Add possibility to ignore users (#2329)

* Add ignore users

* Ignore users in pushrules
Add passing tests

* Update sytest lists

* Store ignore knowledge in the sync API

* Fix copyrights

Co-authored-by: Neil Alexander <neilalexander@users.noreply.github.com>

2 files changed, 92 insertions, 0 deletions

diff --git a/syncapi/storage/postgres/ignores_table.go b/syncapi/storage/postgres/ignores_table.go
new file mode 100644
index 00000000..055a1a23
--- /dev/null
+++ b/syncapi/storage/postgres/ignores_table.go
@@ -0,0 +1,87 @@
+// 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 postgres
+
+import (
+	"context"
+	"database/sql"
+	"encoding/json"
+
+	"github.com/matrix-org/dendrite/syncapi/storage/tables"
+	"github.com/matrix-org/dendrite/syncapi/types"
+)
+
+const ignoresSchema = `
+-- Stores data about ignoress
+CREATE TABLE IF NOT EXISTS syncapi_ignores (
+	-- The user ID whose ignore list this belongs to.
+	user_id TEXT NOT NULL,
+	ignores_json TEXT NOT NULL,
+	PRIMARY KEY(user_id)
+);
+`
+
+const selectIgnoresSQL = "" +
+	"SELECT ignores_json FROM syncapi_ignores WHERE user_id = $1"
+
+const upsertIgnoresSQL = "" +
+	"INSERT INTO syncapi_ignores (user_id, ignores_json) VALUES ($1, $2)" +
+	" ON CONFLICT (user_id) DO UPDATE set ignores_json = $2"
+
+type ignoresStatements struct {
+	selectIgnoresStmt *sql.Stmt
+	upsertIgnoresStmt *sql.Stmt
+}
+
+func NewPostgresIgnoresTable(db *sql.DB) (tables.Ignores, error) {
+	_, err := db.Exec(ignoresSchema)
+	if err != nil {
+		return nil, err
+	}
+	s := &ignoresStatements{}
+	if s.selectIgnoresStmt, err = db.Prepare(selectIgnoresSQL); err != nil {
+		return nil, err
+	}
+	if s.upsertIgnoresStmt, err = db.Prepare(upsertIgnoresSQL); err != nil {
+		return nil, err
+	}
+	return s, nil
+}
+
+func (s *ignoresStatements) SelectIgnores(
+	ctx context.Context, userID string,
+) (*types.IgnoredUsers, error) {
+	var ignoresData []byte
+	err := s.selectIgnoresStmt.QueryRowContext(ctx, userID).Scan(&ignoresData)
+	if err != nil {
+		return nil, err
+	}
+	var ignores types.IgnoredUsers
+	if err = json.Unmarshal(ignoresData, &ignores); err != nil {
+		return nil, err
+	}
+	return &ignores, nil
+}
+
+func (s *ignoresStatements) UpsertIgnores(
+	ctx context.Context, userID string, ignores *types.IgnoredUsers,
+) error {
+	ignoresJSON, err := json.Marshal(ignores)
+	if err != nil {
+		return err
+	}
+	_, err = s.upsertIgnoresStmt.ExecContext(ctx, userID, ignoresJSON)
+	return err
+}
diff --git a/syncapi/storage/postgres/syncserver.go b/syncapi/storage/postgres/syncserver.go
index 54445c7e..b0382512 100644
--- a/syncapi/storage/postgres/syncserver.go
+++ b/syncapi/storage/postgres/syncserver.go
@@ -90,6 +90,10 @@ func NewDatabase(dbProperties *config.DatabaseOptions) (*SyncServerDatasource, e
 	if err != nil {
 		return nil, err
 	}
+	ignores, err := NewPostgresIgnoresTable(d.db)
+	if err != nil {
+		return nil, err
+	}
 	presence, err := NewPostgresPresenceTable(d.db)
 	if err != nil {
 		return nil, err
@@ -115,6 +119,7 @@ func NewDatabase(dbProperties *config.DatabaseOptions) (*SyncServerDatasource, e
 		Receipts:            receipts,
 		Memberships:         memberships,
 		NotificationData:    notificationData,
+		Ignores:             ignores,
 		Presence:            presence,
 	}
 	return &d, nil