func assignRoleToToken(w http.ResponseWriter, r *http.Request, t auth.Token) error {
	if !permission.Check(t, permission.PermRoleUpdateAssign) {
		return permission.ErrUnauthorized
	}
	tokenID := InputValue(r, "token_id")
	contextValue := InputValue(r, "context")
	roleName := r.URL.Query().Get(":name")
	evt, err := event.New(&event.Opts{
		Target:     event.Target{Type: event.TargetTypeRole, Value: roleName},
		Kind:       permission.PermRoleUpdateAssign,
		Owner:      t,
		CustomData: event.FormToCustomData(InputFields(r)),
		Allowed:    event.Allowed(permission.PermRoleReadEvents),
	})
	if err != nil {
		return err
	}
	defer func() { evt.Done(err) }()
	err = canUseRole(t, roleName, contextValue)
	if err != nil {
		return err
	}
	err = servicemanager.TeamToken.AddRole(tokenID, roleName, contextValue)
	if err == authTypes.ErrTeamTokenNotFound {
		w.WriteHeader(http.StatusNotFound)
		return nil
	}
	return err
}
func assignRoleToToken(w http.ResponseWriter, r *http.Request, t auth.Token) error {
	if !permission.Check(t, permission.PermRoleUpdateAssign) {
		return permission.ErrUnauthorized
	}
	tokenID := InputValue(r, "token_id")
	contextValue := InputValue(r, "context")
	roleName := r.URL.Query().Get(":name")
	evt, err := event.New(&event.Opts{
		Target:     event.Target{Type: event.TargetTypeRole, Value: roleName},
		Kind:       permission.PermRoleUpdateAssign,
		Owner:      t,
		CustomData: event.FormToCustomData(InputFields(r)),
		Allowed:    event.Allowed(permission.PermRoleReadEvents),
	})
	if err != nil {
		return err
	}
	defer func() { evt.Done(err) }()
	err = canUseRole(t, roleName, contextValue)
	if err != nil {
		return err
	}
	err = servicemanager.TeamToken.AddRole(tokenID, roleName, contextValue)
	if err == authTypes.ErrTeamTokenNotFound {
		w.WriteHeader(http.StatusNotFound)
		return nil
	}
	return err
}
// title: assign role to token
// path: /roles/{name}/token
// method: POST
// consume: application/x-www-form-urlencoded
// responses:
//   200: Ok
//   400: Invalid data
//   401: Unauthorized
//   404: Role or team token not found