/*

 * Copyright (c) 2010 Nokia Corporation and/or its subsidiary(-ies).

 * All rights reserved.

 * This component and the accompanying materials are made available

 * under the terms of the License "Eclipse Public License v1.0"

 * which accompanies this distribution, and is available

 * at the URL "http://www.eclipse.org/legal/epl-v10.html".

 *

 * Initial Contributors:

 * Nokia Corporation - initial contribution.

 *

 * Contributors:

 *

 * Description: 

 *

 */

package com.nokia.helium.environment.ant.listener;

import java.io.FileWriter;

import java.io.IOException;

import java.util.ArrayList;

import java.util.Hashtable;

import java.util.Iterator;

import java.util.List;

import org.apache.log4j.Logger;

import org.apache.tools.ant.BuildEvent;

import org.apache.tools.ant.BuildListener;

import org.apache.tools.ant.Project;

import org.apache.tools.ant.RuntimeConfigurable;

import org.apache.tools.ant.Task;

import org.apache.tools.ant.UnknownElement;

/**

 * Checks for uses of the <exec> task and logs them to a CSV file.

 * 

 * The ExecListener.file property should be used to define a file to log the output to.

 */

public class ExecListener implements BuildListener {

    private static List<String> execCalls = new ArrayList<String>();

    private Logger logger = Logger.getLogger(this.getClass());

    public static List<String> getExecCalls() {

        return execCalls;

    }

    @Override

    public void buildStarted(BuildEvent event) {

        logger.debug("ExecListener started");

    }

    @Override

    public void buildFinished(BuildEvent event) {

        try {

            String file = event.getProject().getProperty("ExecListener.file");

            if (file != null && file.length() > 0) {

                FileWriter out = new FileWriter(file);

                for (Iterator<String> iterator = execCalls.iterator(); iterator.hasNext();) {

                    String execCall = (String) iterator.next();

                    out.write(execCall + "\n");

                }

                out.close();

            }

        }

        catch (IOException e) {

            e.printStackTrace();

        }

    }

    @Override

    public void messageLogged(BuildEvent event) {

    }

    @Override

    public void targetStarted(BuildEvent event) {

    }

    @Override

    public void targetFinished(BuildEvent event) {

    }

    @Override

    public void taskStarted(BuildEvent event) {

    }

    /**

     * Attempt to log the name of the an exec task if one is executed.

     */

    @SuppressWarnings("unchecked")

    @Override

    public void taskFinished(BuildEvent event) {

        Task task = event.getTask();

        String taskName = task.getTaskName();

        if (taskName != null && taskName.equals("exec")) {

            logger.debug("Found exec task");

            if (task instanceof UnknownElement) {

                RuntimeConfigurable configurable = ((UnknownElement) task).getRuntimeConfigurableWrapper();

                Hashtable<String, String> map = configurable.getAttributeMap();

                String executable = (String) map.get("executable");

                Project project = event.getProject();

                executable = project.replaceProperties(executable);

                logger.debug("ExecListener: executable is run: " + executable);

                execCalls.add(executable);

            }

        }

    }

}