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/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright (c) 1997-2013 Oracle and/or its affiliates. All rights reserved.
 *
 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License.  You can
 * obtain a copy of the License at
 * https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
 * or packager/legal/LICENSE.txt.  See the License for the specific
 * language governing permissions and limitations under the License.
 *
 * When distributing the software, include this License Header Notice in each
 * file and include the License file at packager/legal/LICENSE.txt.
 *
 * GPL Classpath Exception:
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 * exception as provided by Oracle in the GPL Version 2 section of the License
 * file that accompanied this code.
 *
 * Modifications:
 * If applicable, add the following below the License Header, with the fields
 * enclosed by brackets [] replaced by your own identifying information:
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 * and therefore, elected the GPL Version 2 license, then the option applies
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 * holder.
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 * permission notice:
 *
 * Copyright 2004 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
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// Portions Copyright [2019] Payara Foundation and/or affiliates

package org.apache.catalina.ssi;

import org.glassfish.web.util.HtmlEntityEncoder;

import java.io.PrintWriter;
/**
 * Implements the Server-side #set command
 * 
 * @author Paul Speed
 * @author Dan Sandberg
 * @author David Becker
 * @version $Revision: 1.4 $, $Date: 2007/05/05 05:32:20 $
 */
public class SSISet implements SSICommand {
    /**
     * @see SSICommand
     */
    @Override
    public long process(SSIMediator ssiMediator, String commandName,
            String[] paramNames, String[] paramValues, PrintWriter writer)
            throws SSIStopProcessingException {
        long lastModified = 0;
        String variableName = null;
        for (int i = 0; i < paramNames.length; i++) {
            String paramName = paramNames[i];
            String paramValue = paramValues[i];
            if (paramName.equalsIgnoreCase("var")) {
                variableName = paramValue;
            } else if (paramName.equalsIgnoreCase("value")) {
                if (variableName != null) {
                    String substitutedValue = ssiMediator
                            .substituteVariables(paramValue);
                    ssiMediator.setVariableValue(variableName,
                            substitutedValue);
                    lastModified = System.currentTimeMillis();
                } else {
                    ssiMediator.log("#set--no variable specified");
                    String errorMessage = getEncodedConfigErrorMessage(ssiMediator);
                    writer.write(errorMessage);
                    throw new SSIStopProcessingException();
                }
            } else {
                ssiMediator.log("#set--Invalid attribute: " + paramName);
                String errorMessage = getEncodedConfigErrorMessage(ssiMediator);
                writer.write(errorMessage);
                throw new SSIStopProcessingException();
            }
        }
        return lastModified;
    }

    private String getEncodedConfigErrorMessage(SSIMediator ssiMediator) {
        String errorMessage = ssiMediator.getConfigErrMsg();
        return HtmlEntityEncoder.encodeXSS(errorMessage);
    }
}