Function allowedToSeeEvent

federationapi/routing/events.go:56–82

allowedToSeeEvent returns no error if the server is allowed to see this event, otherwise it returns an error response which can be sent to the client.

(
	ctx context.Context,
	origin gomatrixserverlib.ServerName,
	rsAPI api.FederationRoomserverAPI,
	eventID string,
)

// allowedToSeeEvent returns no error if the server is allowed to see this event,
// otherwise it returns an error response which can be sent to the client.
func allowedToSeeEvent(
	ctx context.Context,
	origin gomatrixserverlib.ServerName,
	rsAPI api.FederationRoomserverAPI,
	eventID string,
) *util.JSONResponse {
	var authResponse api.QueryServerAllowedToSeeEventResponse
	err := rsAPI.QueryServerAllowedToSeeEvent(
		ctx,
		&api.QueryServerAllowedToSeeEventRequest{
			EventID:    eventID,
			ServerName: origin,
		},
		&authResponse,
	)
	if err != nil {
		resErr := util.ErrorResponse(err)
		return &resErr
	}

	if !authResponse.AllowedToSeeEvent {
		resErr := util.MessageResponse(http.StatusForbidden, "server not allowed to see event")
		return &resErr
	}

	return nil
}

// fetchEvent fetches the event without auth checks. Returns an error if the event cannot be found.
func fetchEvent(ctx context.Context, rsAPI api.FederationRoomserverAPI, eventID string) (*gomatrixserverlib.Event, *util.JSONResponse) {