<?php
/**
 * Piwik - free/libre analytics platform
 *
 * @link http://piwik.org
 * @license http://www.gnu.org/licenses/gpl-3.0.html GPL v3 or later
 *
 */
namespace Piwik\Access;

use Piwik\Access\Role\Admin;
use Piwik\Access\Role\View;
use Piwik\Access\Role\Write;
use Piwik\Piwik;
use Exception;

class RolesProvider
{
    /**
     * @return Role[]
     */
    public function getAllRoles()
    {
        return array(
            new View(),
            new Write(),
            new Admin()
        );
    }

    /**
     * Returns the list of the existing Access level.
     * Useful when a given API method requests a given acccess Level.
     * We first check that the required access level exists.
     *
     * @return array
     */
    public function getAllRoleIds()
    {
        $ids = array();
        foreach ($this->getAllRoles() as $role) {
            $ids[] = $role->getId();
        }
        return $ids;
    }

    public function isValidRole($roleId)
    {
        $roles = $this->getAllRoleIds();

        return in_array($roleId, $roles, true);
    }

    public function checkValidRole($roleId)
    {
        if (!$this->isValidRole($roleId)) {
            $roles = $this->getAllRoleIds();
            throw new Exception(Piwik::translate("UsersManager_ExceptionAccessValues", implode(", ", $roles)));
        }
    }

}