/*
 * (C) Copyright 2013 Nuxeo SA (http://nuxeo.com/) and others.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 * Contributors:
 *     Thomas Roger
 */

package org.nuxeo.ecm.platform.usermanager.providers;

import java.util.ArrayList;
import java.util.List;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.nuxeo.ecm.core.api.DocumentModel;
import org.nuxeo.ecm.core.api.NuxeoPrincipal;
import org.nuxeo.ecm.platform.usermanager.UserManager;
import org.nuxeo.runtime.api.Framework;

/**
 * * Page provider listing {@link NuxeoPrincipal}s.
 *
 * @since 5.8
 */
public class NuxeoPrincipalsPageProvider extends AbstractUsersPageProvider<NuxeoPrincipal> {

    private static final Log log = LogFactory.getLog(NuxeoPrincipalsPageProvider.class);

    protected List<NuxeoPrincipal> pagePrincipals;

    @Override
    public List<NuxeoPrincipal> getCurrentPage() {
        if (pagePrincipals == null) {
            List<DocumentModel> users = computeCurrentPage();
            pagePrincipals = new ArrayList<>();
            UserManager userManager = Framework.getLocalService(UserManager.class);
            for (DocumentModel user : users) {
                NuxeoPrincipal principal = userManager.getPrincipal(
                        user.getProperty(userManager.getUserIdField()).getValue(String.class));
                pagePrincipals.add(principal);
            }
        }

        return pagePrincipals;
    }

    @Override
    protected void pageChanged() {
        pagePrincipals = null;
        super.pageChanged();
    }

    @Override
    public void refresh() {
        pagePrincipals = null;
        super.refresh();
    }
}