/*
 * Copyright 2013 Robert von Burg <eitch@eitchnet.ch>
 * 
 * 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.
 */
package li.strolch.privilege.xml;

import java.io.File;
import java.util.List;

import org.w3c.dom.Document;
import org.w3c.dom.Element;

import li.strolch.privilege.helper.XmlConstants;
import li.strolch.privilege.model.IPrivilege;
import li.strolch.privilege.model.internal.Role;
import li.strolch.utils.helper.XmlHelper;

/**
 * @author Robert von Burg <eitch@eitchnet.ch>
 */
public class PrivilegeRolesDomWriter {

	private List<Role> roles;
	private File modelFile;

	/**
	 * @param users
	 * @param roles
	 * @param modelFile
	 */
	public PrivilegeRolesDomWriter(List<Role> roles, File modelFile) {
		this.roles = roles;
		this.modelFile = modelFile;
	}

	public void write() {

		// create document root
		Document doc = XmlHelper.createDocument();
		Element rootElement = doc.createElement(XmlConstants.XML_ROLES);
		doc.appendChild(rootElement);

		this.roles.stream().sorted((r1, r2) -> r1.getName().compareTo(r2.getName())).forEach(role -> {

			// create the role element
			Element roleElement = doc.createElement(XmlConstants.XML_ROLE);
			rootElement.appendChild(roleElement);

			roleElement.setAttribute(XmlConstants.XML_ATTR_NAME, role.getName());

			for (String privilegeName : role.getPrivilegeNames()) {
				IPrivilege privilege = role.getPrivilege(privilegeName);

				// create the privilege element
				Element privilegeElement = doc.createElement(XmlConstants.XML_PRIVILEGE);
				roleElement.appendChild(privilegeElement);

				privilegeElement.setAttribute(XmlConstants.XML_ATTR_NAME, privilege.getName());
				privilegeElement.setAttribute(XmlConstants.XML_ATTR_POLICY, privilege.getPolicy());

				// add the all allowed element
				if (privilege.isAllAllowed()) {
					Element allAllowedElement = doc.createElement(XmlConstants.XML_ALL_ALLOWED);
					allAllowedElement.setTextContent(Boolean.toString(privilege.isAllAllowed()));
					privilegeElement.appendChild(allAllowedElement);
				}

				// add all the deny values
				for (String denyValue : privilege.getDenyList()) {
					Element denyValueElement = doc.createElement(XmlConstants.XML_DENY);
					denyValueElement.setTextContent(denyValue);
					privilegeElement.appendChild(denyValueElement);
				}

				// add all the allow values
				for (String allowValue : privilege.getAllowList()) {
					Element allowValueElement = doc.createElement(XmlConstants.XML_ALLOW);
					allowValueElement.setTextContent(allowValue);
					privilegeElement.appendChild(allowValueElement);
				}
			}
		});

		// write the container file to disk
		XmlHelper.writeDocument(doc, this.modelFile);
	}
}