package ${package}.flux.modules.screens;

/*
 * Copyright 2001-2017 The Apache Software Foundation.
 *
 * 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.
 */

import org.apache.commons.configuration.Configuration;
import org.apache.fulcrum.security.model.turbine.TurbineAccessControlList;
import org.apache.turbine.Turbine;
import org.apache.turbine.TurbineConstants;
import org.apache.turbine.annotation.TurbineConfiguration;
import org.apache.turbine.annotation.TurbineService;
import org.apache.turbine.modules.screens.VelocitySecureScreen;
import org.apache.turbine.pipeline.PipelineData;
import org.apache.turbine.services.security.SecurityService;
import org.apache.turbine.util.RunData;
import org.apache.velocity.context.Context;

/**
 * Base screen for secure web access to the Flux user manager
 *
 */
public class FluxIndex extends VelocitySecureScreen {

	@TurbineService
	protected SecurityService securityService;

	@TurbineConfiguration(TurbineConstants.TEMPLATE_LOGIN)
	private Configuration templateLogin;

	@TurbineConfiguration(TurbineConstants.TEMPLATE_HOMEPAGE)
	private Configuration templateHomepage;

	/**
	 * This method is called by the Turbine framework when the associated Velocity
	 * template, Index.vm is requested
	 * 
	 * @param data
	 *            the Turbine request data
	 * @param context
	 *            the Velocity context
	 * @throws Exception
	 *             a generic Exception
	 */
	@Override
	protected void doBuildTemplate(PipelineData data, Context context) throws Exception {
	}

	@Override
	protected boolean isAuthorized(PipelineData pipelineData) throws Exception {

		RunData data = getRunData(pipelineData);

		boolean isAuthorized = false;

		/*
		 * Grab the Flux Admin role listed in the Flux.properties file that is included
		 * in the the standard TurbineResources.properties file.
		 */
		String fluxAdminRole = Turbine.getConfiguration().getString("flux.admin.role");

		// Get the Turbine ACL implementation
		TurbineAccessControlList acl = data.getACL();

		if (acl == null) {
			// commons configuration getProperty: prefix removed, the key for the value ..
			// is an empty string, the result an object
			data.setScreenTemplate((String) templateLogin.getProperty(""));
			isAuthorized = false;
		} else if (acl.hasRole(fluxAdminRole)) {
			isAuthorized = true;
		} else {
			data.setScreenTemplate((String) templateHomepage.getProperty(""));
			data.setMessage("You do not have access to this part of the site.");
			isAuthorized = false;
		}
		return isAuthorized;
	}

}