Correctly use provided filters (#2339)

* Apply filters correctly

* Fix issues; Use prepareWithFilters

* Update gmsl & tests

* go.mod..

* PR comments

7 files changed, 101 insertions, 63 deletions

diff --git a/syncapi/routing/context.go b/syncapi/routing/context.go
index 2412bc2a..aaa0c61b 100644
--- a/syncapi/routing/context.go
+++ b/syncapi/routing/context.go
@@ -60,7 +60,9 @@ func Context(
 			Headers: nil,
 		}
 	}
-	filter.Rooms = append(filter.Rooms, roomID)
+	if filter.Rooms != nil {
+		*filter.Rooms = append(*filter.Rooms, roomID)
+	}
 
 	ctx := req.Context()
 	membershipRes := roomserver.QueryMembershipForUserResponse{}
diff --git a/syncapi/storage/postgres/current_room_state_table.go b/syncapi/storage/postgres/current_room_state_table.go
index 69e6e30e..fe68788d 100644
--- a/syncapi/storage/postgres/current_room_state_table.go
+++ b/syncapi/storage/postgres/current_room_state_table.go
@@ -233,9 +233,10 @@ func (s *currentRoomStateStatements) SelectCurrentState(
 	excludeEventIDs []string,
 ) ([]*gomatrixserverlib.HeaderedEvent, error) {
 	stmt := sqlutil.TxStmt(txn, s.selectCurrentStateStmt)
+	senders, notSenders := getSendersStateFilterFilter(stateFilter)
 	rows, err := stmt.QueryContext(ctx, roomID,
-		pq.StringArray(stateFilter.Senders),
-		pq.StringArray(stateFilter.NotSenders),
+		pq.StringArray(senders),
+		pq.StringArray(notSenders),
 		pq.StringArray(filterConvertTypeWildcardToSQL(stateFilter.Types)),
 		pq.StringArray(filterConvertTypeWildcardToSQL(stateFilter.NotTypes)),
 		stateFilter.ContainsURL,
diff --git a/syncapi/storage/postgres/filtering.go b/syncapi/storage/postgres/filtering.go
index dcc42136..a2ca4215 100644
--- a/syncapi/storage/postgres/filtering.go
+++ b/syncapi/storage/postgres/filtering.go
@@ -16,21 +16,45 @@ package postgres
 
 import (
 	"strings"
+
+	"github.com/matrix-org/gomatrixserverlib"
 )
 
 // filterConvertWildcardToSQL converts wildcards as defined in
 // https://matrix.org/docs/spec/client_server/r0.3.0.html#post-matrix-client-r0-user-userid-filter
 // to SQL wildcards that can be used with LIKE()
-func filterConvertTypeWildcardToSQL(values []string) []string {
+func filterConvertTypeWildcardToSQL(values *[]string) []string {
 	if values == nil {
 		// Return nil instead of []string{} so IS NULL can work correctly when
 		// the return value is passed into SQL queries
 		return nil
 	}
 
-	ret := make([]string, len(values))
-	for i := range values {
-		ret[i] = strings.Replace(values[i], "*", "%", -1)
+	v := *values
+	ret := make([]string, len(v))
+	for i := range v {
+		ret[i] = strings.Replace(v[i], "*", "%", -1)
 	}
 	return ret
 }
+
+// TODO: Replace when Dendrite uses Go 1.18
+func getSendersRoomEventFilter(filter *gomatrixserverlib.RoomEventFilter) (senders []string, notSenders []string) {
+	if filter.Senders != nil {
+		senders = *filter.Senders
+	}
+	if filter.NotSenders != nil {
+		notSenders = *filter.NotSenders
+	}
+	return senders, notSenders
+}
+
+func getSendersStateFilterFilter(filter *gomatrixserverlib.StateFilter) (senders []string, notSenders []string) {
+	if filter.Senders != nil {
+		senders = *filter.Senders
+	}
+	if filter.NotSenders != nil {
+		notSenders = *filter.NotSenders
+	}
+	return senders, notSenders
+}
diff --git a/syncapi/storage/postgres/output_room_events_table.go b/syncapi/storage/postgres/output_room_events_table.go
index a30e220b..269cd449 100644
--- a/syncapi/storage/postgres/output_room_events_table.go
+++ b/syncapi/storage/postgres/output_room_events_table.go
@@ -204,11 +204,11 @@ func (s *outputRoomEventsStatements) SelectStateInRange(
 	stateFilter *gomatrixserverlib.StateFilter, roomIDs []string,
 ) (map[string]map[string]bool, map[string]types.StreamEvent, error) {
 	stmt := sqlutil.TxStmt(txn, s.selectStateInRangeStmt)
-
+	senders, notSenders := getSendersStateFilterFilter(stateFilter)
 	rows, err := stmt.QueryContext(
 		ctx, r.Low(), r.High(), pq.StringArray(roomIDs),
-		pq.StringArray(stateFilter.Senders),
-		pq.StringArray(stateFilter.NotSenders),
+		pq.StringArray(senders),
+		pq.StringArray(notSenders),
 		pq.StringArray(filterConvertTypeWildcardToSQL(stateFilter.Types)),
 		pq.StringArray(filterConvertTypeWildcardToSQL(stateFilter.NotTypes)),
 		stateFilter.ContainsURL,
@@ -353,10 +353,11 @@ func (s *outputRoomEventsStatements) SelectRecentEvents(
 	} else {
 		stmt = sqlutil.TxStmt(txn, s.selectRecentEventsStmt)
 	}
+	senders, notSenders := getSendersRoomEventFilter(eventFilter)
 	rows, err := stmt.QueryContext(
 		ctx, roomID, r.Low(), r.High(),
-		pq.StringArray(eventFilter.Senders),
-		pq.StringArray(eventFilter.NotSenders),
+		pq.StringArray(senders),
+		pq.StringArray(notSenders),
 		pq.StringArray(filterConvertTypeWildcardToSQL(eventFilter.Types)),
 		pq.StringArray(filterConvertTypeWildcardToSQL(eventFilter.NotTypes)),
 		eventFilter.Limit+1,
@@ -398,11 +399,12 @@ func (s *outputRoomEventsStatements) SelectEarlyEvents(
 	ctx context.Context, txn *sql.Tx,
 	roomID string, r types.Range, eventFilter *gomatrixserverlib.RoomEventFilter,
 ) ([]types.StreamEvent, error) {
+	senders, notSenders := getSendersRoomEventFilter(eventFilter)
 	stmt := sqlutil.TxStmt(txn, s.selectEarlyEventsStmt)
 	rows, err := stmt.QueryContext(
 		ctx, roomID, r.Low(), r.High(),
-		pq.StringArray(eventFilter.Senders),
-		pq.StringArray(eventFilter.NotSenders),
+		pq.StringArray(senders),
+		pq.StringArray(notSenders),
 		pq.StringArray(filterConvertTypeWildcardToSQL(eventFilter.Types)),
 		pq.StringArray(filterConvertTypeWildcardToSQL(eventFilter.NotTypes)),
 		eventFilter.Limit,
@@ -480,10 +482,11 @@ func (s *outputRoomEventsStatements) SelectContextEvent(ctx context.Context, txn
 func (s *outputRoomEventsStatements) SelectContextBeforeEvent(
 	ctx context.Context, txn *sql.Tx, id int, roomID string, filter *gomatrixserverlib.RoomEventFilter,
 ) (evts []*gomatrixserverlib.HeaderedEvent, err error) {
+	senders, notSenders := getSendersRoomEventFilter(filter)
 	rows, err := sqlutil.TxStmt(txn, s.selectContextBeforeEventStmt).QueryContext(
 		ctx, roomID, id, filter.Limit,
-		pq.StringArray(filter.Senders),
-		pq.StringArray(filter.NotSenders),
+		pq.StringArray(senders),
+		pq.StringArray(notSenders),
 		pq.StringArray(filterConvertTypeWildcardToSQL(filter.Types)),
 		pq.StringArray(filterConvertTypeWildcardToSQL(filter.NotTypes)),
 	)
@@ -512,10 +515,11 @@ func (s *outputRoomEventsStatements) SelectContextBeforeEvent(
 func (s *outputRoomEventsStatements) SelectContextAfterEvent(
 	ctx context.Context, txn *sql.Tx, id int, roomID string, filter *gomatrixserverlib.RoomEventFilter,
 ) (lastID int, evts []*gomatrixserverlib.HeaderedEvent, err error) {
+	senders, notSenders := getSendersRoomEventFilter(filter)
 	rows, err := sqlutil.TxStmt(txn, s.selectContextAfterEventStmt).QueryContext(
 		ctx, roomID, id, filter.Limit,
-		pq.StringArray(filter.Senders),
-		pq.StringArray(filter.NotSenders),
+		pq.StringArray(senders),
+		pq.StringArray(notSenders),
 		pq.StringArray(filterConvertTypeWildcardToSQL(filter.Types)),
 		pq.StringArray(filterConvertTypeWildcardToSQL(filter.NotTypes)),
 	)
diff --git a/syncapi/storage/sqlite3/account_data_table.go b/syncapi/storage/sqlite3/account_data_table.go
index 5b2287e6..b0aeb70f 100644
--- a/syncapi/storage/sqlite3/account_data_table.go
+++ b/syncapi/storage/sqlite3/account_data_table.go
@@ -41,10 +41,10 @@ const insertAccountDataSQL = "" +
 	" ON CONFLICT (user_id, room_id, type) DO UPDATE" +
 	" SET id = $5"
 
+// further parameters are added by prepareWithFilters
 const selectAccountDataInRangeSQL = "" +
 	"SELECT room_id, type FROM syncapi_account_data_type" +
-	" WHERE user_id = $1 AND id > $2 AND id <= $3" +
-	" ORDER BY id ASC"
+	" WHERE user_id = $1 AND id > $2 AND id <= $3"
 
 const selectMaxAccountDataIDSQL = "" +
 	"SELECT MAX(id) FROM syncapi_account_data_type"
@@ -94,18 +94,25 @@ func (s *accountDataStatements) SelectAccountDataInRange(
 	ctx context.Context,
 	userID string,
 	r types.Range,
-	accountDataFilterPart *gomatrixserverlib.EventFilter,
+	filter *gomatrixserverlib.EventFilter,
 ) (data map[string][]string, err error) {
 	data = make(map[string][]string)
-
-	rows, err := s.selectAccountDataInRangeStmt.QueryContext(ctx, userID, r.Low(), r.High())
+	stmt, params, err := prepareWithFilters(
+		s.db, nil, selectAccountDataInRangeSQL,
+		[]interface{}{
+			userID, r.Low(), r.High(),
+		},
+		filter.Senders, filter.NotSenders,
+		filter.Types, filter.NotTypes,
+		[]string{}, filter.Limit, FilterOrderAsc,
+	)
+
+	rows, err := stmt.QueryContext(ctx, params...)
 	if err != nil {
 		return
 	}
 	defer internal.CloseAndLogIfError(ctx, rows, "selectAccountDataInRange: rows.close() failed")
 
-	var entries int
-
 	for rows.Next() {
 		var dataType string
 		var roomID string
@@ -114,31 +121,11 @@ func (s *accountDataStatements) SelectAccountDataInRange(
 			return
 		}
 
-		// check if we should add this by looking at the filter.
-		// It would be nice if we could do this in SQL-land, but the mix of variadic
-		// and positional parameters makes the query annoyingly hard to do, it's easier
-		// and clearer to do it in Go-land. If there are no filters for [not]types then
-		// this gets skipped.
-		for _, includeType := range accountDataFilterPart.Types {
-			if includeType != dataType { // TODO: wildcard support
-				continue
-			}
-		}
-		for _, excludeType := range accountDataFilterPart.NotTypes {
-			if excludeType == dataType { // TODO: wildcard support
-				continue
-			}
-		}
-
 		if len(data[roomID]) > 0 {
 			data[roomID] = append(data[roomID], dataType)
 		} else {
 			data[roomID] = []string{dataType}
 		}
-		entries++
-		if entries >= accountDataFilterPart.Limit {
-			break
-		}
 	}
 
 	return data, nil
diff --git a/syncapi/storage/sqlite3/filtering.go b/syncapi/storage/sqlite3/filtering.go
index 11f3e647..54b12ddf 100644
--- a/syncapi/storage/sqlite3/filtering.go
+++ b/syncapi/storage/sqlite3/filtering.go
@@ -25,32 +25,48 @@ const (
 // parts.
 func prepareWithFilters(
 	db *sql.DB, txn *sql.Tx, query string, params []interface{},
-	senders, notsenders, types, nottypes []string, excludeEventIDs []string,
+	senders, notsenders, types, nottypes *[]string, excludeEventIDs []string,
 	limit int, order FilterOrder,
 ) (*sql.Stmt, []interface{}, error) {
 	offset := len(params)
-	if count := len(senders); count > 0 {
-		query += " AND sender IN " + sqlutil.QueryVariadicOffset(count, offset)
-		for _, v := range senders {
-			params, offset = append(params, v), offset+1
+	if senders != nil {
+		if count := len(*senders); count > 0 {
+			query += " AND sender IN " + sqlutil.QueryVariadicOffset(count, offset)
+			for _, v := range *senders {
+				params, offset = append(params, v), offset+1
+			}
+		} else {
+			query += ` AND sender = ""`
 		}
 	}
-	if count := len(notsenders); count > 0 {
-		query += " AND sender NOT IN " + sqlutil.QueryVariadicOffset(count, offset)
-		for _, v := range notsenders {
-			params, offset = append(params, v), offset+1
+	if notsenders != nil {
+		if count := len(*notsenders); count > 0 {
+			query += " AND sender NOT IN " + sqlutil.QueryVariadicOffset(count, offset)
+			for _, v := range *notsenders {
+				params, offset = append(params, v), offset+1
+			}
+		} else {
+			query += ` AND sender NOT = ""`
 		}
 	}
-	if count := len(types); count > 0 {
-		query += " AND type IN " + sqlutil.QueryVariadicOffset(count, offset)
-		for _, v := range types {
-			params, offset = append(params, v), offset+1
+	if types != nil {
+		if count := len(*types); count > 0 {
+			query += " AND type IN " + sqlutil.QueryVariadicOffset(count, offset)
+			for _, v := range *types {
+				params, offset = append(params, v), offset+1
+			}
+		} else {
+			query += ` AND type = ""`
 		}
 	}
-	if count := len(nottypes); count > 0 {
-		query += " AND type NOT IN " + sqlutil.QueryVariadicOffset(count, offset)
-		for _, v := range nottypes {
-			params, offset = append(params, v), offset+1
+	if nottypes != nil {
+		if count := len(*nottypes); count > 0 {
+			query += " AND type NOT IN " + sqlutil.QueryVariadicOffset(count, offset)
+			for _, v := range *nottypes {
+				params, offset = append(params, v), offset+1
+			}
+		} else {
+			query += ` AND type NOT = ""`
 		}
 	}
 	if count := len(excludeEventIDs); count > 0 {
diff --git a/syncapi/streams/stream_pdu.go b/syncapi/streams/stream_pdu.go
index ab200e00..bcaf6ca3 100644
--- a/syncapi/streams/stream_pdu.go
+++ b/syncapi/streams/stream_pdu.go
@@ -423,8 +423,12 @@ func (p *PDUStreamProvider) addIgnoredUsersToFilter(ctx context.Context, req *ty
 		return err
 	}
 	req.IgnoredUsers = *ignores
+	userList := make([]string, 0, len(ignores.List))
 	for userID := range ignores.List {
-		eventFilter.NotSenders = append(eventFilter.NotSenders, userID)
+		userList = append(userList, userID)
+	}
+	if len(userList) > 0 {
+		eventFilter.NotSenders = &userList
 	}
 	return nil
 }