/*
 * Licensed to Jasig under one or more contributor license
 * agreements. See the NOTICE file distributed with this work
 * for additional information regarding copyright ownership.
 * Jasig licenses this file to you 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 the following location:
 *
 *   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 org.jasig.cas.web.flow;

import org.jasig.cas.authentication.principal.Service;
import org.jasig.cas.services.ServicesManager;
import org.jasig.cas.services.UnauthorizedServiceException;
import org.jasig.cas.web.support.WebUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.webflow.action.AbstractAction;
import org.springframework.webflow.execution.Event;
import org.springframework.webflow.execution.RequestContext;

import javax.validation.constraints.NotNull;

/**
 * Performs an authorization check for the gateway request if there is no Ticket Granting Ticket.
 *
 * @author Scott Battaglia
 * @version $Revision$ $Date$
 * @since 3.4.5
 */
public class GatewayServicesManagementCheck extends AbstractAction {

    @NotNull
    private final ServicesManager servicesManager;

    public GatewayServicesManagementCheck(final ServicesManager servicesManager) {
        this.servicesManager = servicesManager;
    }

    @Override
    protected Event doExecute(final RequestContext context) throws Exception {
        final Service service = WebUtils.getService(context);

        final boolean match = this.servicesManager.matchesExistingService(service);

        if (match) {
            return success();
        }

        throw new UnauthorizedServiceException(String.format("Service [%s] is not authorized to use CAS.", service.getId()));
    }
}