Modify QuerySharedUsers to handle counts/include/exclude (#1219)

* Modify QuerySharedUsers to handle counts/include/exclude

We will need this functionality when working out whether to
send device list changes to users who have joined/left a room.

* Linting

1 files changed, 2 insertions, 2 deletions

diff --git a/currentstateserver/storage/interface.go b/currentstateserver/storage/interface.go
index 1c4635be..8deaa348 100644
--- a/currentstateserver/storage/interface.go
+++ b/currentstateserver/storage/interface.go
@@ -37,6 +37,6 @@ type Database interface {
 	GetBulkStateContent(ctx context.Context, roomIDs []string, tuples []gomatrixserverlib.StateKeyTuple, allowWildcards bool) ([]tables.StrippedEvent, error)
 	// Redact a state event
 	RedactEvent(ctx context.Context, redactedEventID string, redactedBecause gomatrixserverlib.HeaderedEvent) error
-	// JoinedUsersSetInRooms returns all joined users in the rooms given.
-	JoinedUsersSetInRooms(ctx context.Context, roomIDs []string) ([]string, error)
+	// JoinedUsersSetInRooms returns all joined users in the rooms given, along with the count of how many times they appear.
+	JoinedUsersSetInRooms(ctx context.Context, roomIDs []string) (map[string]int, error)
 }