/**
 * This file Copyright (c) 2010-2012 Magnolia International
 * Ltd.  (http://www.magnolia-cms.com). All rights reserved.
 *
 *
 * This file is dual-licensed under both the Magnolia
 * Network Agreement and the GNU General Public License.
 * You may elect to use one or the other of these licenses.
 *
 * This file is distributed in the hope that it will be
 * useful, but AS-IS and WITHOUT ANY WARRANTY; without even the
 * implied warranty of MERCHANTABILITY or FITNESS FOR A
 * PARTICULAR PURPOSE, TITLE, or NONINFRINGEMENT.
 * Redistribution, except as permitted by whichever of the GPL
 * or MNA you select, is prohibited.
 *
 * 1. For the GPL license (GPL), you can redistribute and/or
 * modify this file under the terms of the GNU General
 * Public License, Version 3, as published by the Free Software
 * Foundation.  You should have received a copy of the GNU
 * General Public License, Version 3 along with this program;
 * if not, write to the Free Software Foundation, Inc., 51
 * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * 2. For the Magnolia Network Agreement (MNA), this file
 * and the accompanying materials are made available under the
 * terms of the MNA which accompanies this distribution, and
 * is available at http://www.magnolia-cms.com/mna.html
 *
 * Any modifications to this file must keep this entire header
 * intact.
 *
 */
package info.magnolia.module.delta;

import info.magnolia.cms.security.Role;
import info.magnolia.cms.security.RoleManager;
import info.magnolia.cms.security.SecuritySupport;
import info.magnolia.module.InstallContext;

import javax.jcr.RepositoryException;

/**
 * A task to remove a permission from a role, using {@link info.magnolia.cms.security.RoleManager}.
 * Removes the permission to the given path, as well as "path/*".

 * @author zdenekskodik
 * @version $Id$
 */
public class RemovePermissionTask extends AbstractRepositoryTask {

    private final String roleName;
    private final String workspaceName;
    private final String pathToRemove;
    private final long permission;

    public RemovePermissionTask(String taskName, String taskDescription, String roleName, String workspaceName, String pathToRemove, long permission) {
        super(taskName, taskDescription);
        this.roleName = roleName;
        this.workspaceName = workspaceName;
        this.pathToRemove = pathToRemove;
        this.permission = permission;
    }

    @Override
    protected void doExecute(InstallContext ctx) throws RepositoryException, TaskExecutionException {
        try {
            final SecuritySupport securitySupport = SecuritySupport.Factory.getInstance();
            final RoleManager roleManager = securitySupport.getRoleManager();
            final Role role = roleManager.getRole(roleName);

            if (role != null) {
                roleManager.removePermission(role, workspaceName, pathToRemove, permission);
                roleManager.removePermission(role, workspaceName, pathToRemove + "/*", permission);
            } else {
                ctx.warn("Role \"" + roleName + "\" not found, can't remove its ACL permission.");
            }
        } catch (UnsupportedOperationException e1) {
            ctx.warn("Can't update role \"" + roleName + "\" due to an unsupported operation exception. This is most likely the case if the roles are managed externally.");
        }
    }
}