public function getDashboardWorkspaceSpentTimes(Workspace $workspace, User $user, $all = false)
    {
        $datas = [];
        // user(s) concerned by the query
        if ($all) {
            // get all users involved in the workspace
            $ids = $this->getWorkspaceUsersIds($workspace);
        } else {
            // only the current user
            $ids[] = $user->getId();
        }

        // for each user (ie user ids) -> get first 'workspace-enter' event for the given workspace
        foreach ($ids as $uid) {
            $userSqlSelect = 'SELECT first_name, last_name FROM claro_user WHERE id = :uid';
            $userSqlSelectStmt = $this->em->getConnection()->prepare($userSqlSelect);
            $userSqlSelectStmt->bindValue('uid', $uid);
            $userSqlSelectStmt->execute();
            $userData = $userSqlSelectStmt->fetch();

            // select first "workspace-enter" actions for the given user and workspace
            $selectEnterEventOnThisWorkspace = "SELECT DISTINCT date_log FROM claro_log WHERE workspace_id = :wid AND action = 'workspace-enter' AND doer_id = :uid ORDER BY date_log ASC LIMIT 1";
            $selectEnterEventOnThisWorkspaceStmt = $this->em->getConnection()->prepare($selectEnterEventOnThisWorkspace);
            $selectEnterEventOnThisWorkspaceStmt->bindValue('uid', $uid);
            $selectEnterEventOnThisWorkspaceStmt->bindValue('wid', $workspace->getId());
            $selectEnterEventOnThisWorkspaceStmt->execute();
            $enterOnThisWorksapceDateResult = $selectEnterEventOnThisWorkspaceStmt->fetch();
            $refDate = $enterOnThisWorksapceDateResult['date_log'];

            $total = 0;
            if ($refDate) {
                $total = $this->computeTimeForUserAndWorkspace($refDate, $uid, $workspace->getId(), 0);
            }

            $datas[] = [
              'user' => [
                'id' => $uid,
                'firstName' => $userData['first_name'],
                'lastName' => $userData['last_name'],
              ],
              'time' => $total,
            ];
        }

        return $datas;
    }