/* ====================================================================
 * The Apache Software License, Version 1.1
 *
 * Copyright (c) 2002 The Apache Software Foundation.  All rights
 * reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. The end-user documentation included with the redistribution,
 *    if any, must include the following acknowledgment:
 *       "This product includes software developed by the
 *        Apache Software Foundation (http://www.apache.org/)."
 *    Alternately, this acknowledgment may appear in the software itself,
 *    if and wherever such third-party acknowledgments normally appear.
 *
 * 4. The names "Apache" and "Apache Software Foundation" and
 *    "Apache POI" must not be used to endorse or promote products
 *    derived from this software without prior written permission. For
 *    written permission, please contact apache@apache.org.
 *
 * 5. Products derived from this software may not be called "Apache",
 *    "Apache POI", nor may "Apache" appear in their name, without
 *    prior written permission of the Apache Software Foundation.
 *
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Software Foundation.  For more
 * information on the Apache Software Foundation, please see
 * <http://www.apache.org/>.
 */

import java.io.*;

import java.util.*;

import org.apache.tools.ant.*;
import org.apache.tools.ant.taskdefs.*;
import org.apache.tools.ant.types.*;

/**
 * Add components to the sitemap
 *
 * @author <a href="mailto:cziegeler@apache.org">Carsten Ziegeler</a>
 * @version CVS $Revision$ $Date$
 */

public final class SitemapTool
    extends Task
{
    private String sitemap;
    private String directory;
    private String extension;

    public void setSitemap(String sitemap)
    {
        this.sitemap = sitemap;
    }

    public void setDirectory(String directory)
    {
        this.directory = directory;
    }

    public void setExtension(String extension)
    {
        this.extension = extension;
    }

    public void execute()
        throws BuildException
    {
        if (this.sitemap == null)
        {
            throw new BuildException("sitemap attribute is required",
                                     location);
        }
        if (this.extension == null)
        {
            throw new BuildException("extension attribute is required",
                                     location);
        }
        if (this.directory == null)
        {
            throw new BuildException("directory attribute is required",
                                     location);
        }
        try
        {

            // process recursive
            this.process(new File(this.directory), this.extension,
                         this.sitemap);
        }
        catch (IOException ioe)
        {
            throw new BuildException("IOException: " + ioe);
        }
    }

    /**
     * Scan recursive
     */

    private void process(final File directoryFile, final String ext,
                         final String sitemapLocation)
        throws IOException, BuildException
    {
        final File[] files = directoryFile.listFiles();

        for (int i = 0; i < files.length; i++)
        {
            if (files[ i ].isDirectory() == true)
            {
                this.process(files[ i ], ext, sitemapLocation);
            }
            else
            {
                if (files[ i ].getName().endsWith("." + ext) == true)
                {
                    System.out.println("Reading: "
                                       + files[ i ].getAbsolutePath());
                    final String          data =
                        this.load(files[ i ].getAbsolutePath());

                    // separate the data by lines
                    final StringTokenizer st   = new StringTokenizer(data);

                    while (st.hasMoreElements() == true)
                    {

                        // now get the properties of a line. These are separated by a "|"
                        final String          line          =
                            ( String ) st.nextElement();
                        final StringTokenizer prop          =
                            new StringTokenizer(line, "|");
                        String                category      = null;
                        String                componentName = null;
                        String                className     = null;
                        String                configuration = null;
                        String                label         = null;
                        String                mimeType      = null;

                        while (prop.hasMoreElements() == true)
                        {
                            final String property =
                                ( String ) prop.nextElement();
                            final int    pos      = property.indexOf(":");
                            final String propName =
                                property.substring(0, pos);
                            final String propVal  = property.substring(pos
                                                                       + 1);

                            if (propName.equals("category"))
                            {
                                category = propVal;
                            }
                            else if (propName.equals("componentName"))
                            {
                                componentName = propVal;
                            }
                            else if (propName.equals("componentClass"))
                            {
                                className = propVal;
                            }
                            else if (propName.equals("configuration"))
                            {
                                configuration = propVal;
                            }
                            else if (propName.equals("label"))
                            {
                                label = propVal;
                            }
                            else if (propName.equals("mimeType"))
                            {
                                mimeType = propVal;
                            }
                            else
                            {
                                throw new BuildException(
                                    "Unknown property " + propName
                                    + " in file "
                                    + files[ i ].getAbsolutePath());
                            }
                        }

                        // Test for required values
                        if (category == null)
                        {
                            throw new BuildException(
                                "category property is required in file "
                                + files[ i ].getAbsolutePath(), location);
                        }
                        if (componentName == null)
                        {
                            throw new BuildException(
                                "componentName property is required in file "
                                + files[ i ].getAbsolutePath(), location);
                        }
                        if (className == null)
                        {
                            throw new BuildException(
                                "componentClass property is required in file "
                                + files[ i ].getAbsolutePath(), location);
                        }
                        this.add(sitemapLocation, category, componentName,
                                 className, configuration, label, mimeType);
                    }
                }
            }
        }
    }

    /**
     * Add entry to sitemap
     */

    private void add(final String sitemapLocation, final String category,
                     final String componentName, final String className,
                     final String configuration, final String label,
                     final String mimeType)
        throws IOException
    {
        final String data             = load(sitemapLocation);
        final String searchString     =
            new StringBuffer("</map:").append(category).append(">")
                .toString();
        final int    pos              = data.indexOf(searchString);
        int          categoryStartPos =
            data
            .indexOf(new StringBuffer("<map:").append(category).append(">")
                .toString());

        if (categoryStartPos == -1)
        {
            categoryStartPos =
                data
                .indexOf(new StringBuffer("<map:").append(category)
                    .append(" ").toString());
        }
        if ((categoryStartPos != -1) && (categoryStartPos < pos)
                && (pos != -1))
        {

            // the category exists, now search if a component
            // with the name already exists
            int componentPos =
                data.substring(categoryStartPos, pos)
                    .indexOf(new StringBuffer("name=\"").append(componentName)
                        .append("\"").toString());

            if (componentPos == -1)
            {
                StringBuffer buffer =
                    new StringBuffer(data.substring(0, pos)).append("<map:")
                        .append(category.substring(0, category.length() - 1))
                        .append(" name=\"").append(componentName)
                        .append("\" src=\"").append(className).append("\"")
                        .append(" logger=\"sitemap.")
                        .append(category.substring(0, category.length() - 1))
                        .append('.').append(componentName).append('\"');

                if ((null != mimeType) && (mimeType.length() > 0))
                {
                    buffer.append(" mime-type=\"").append(mimeType)
                        .append("\"");
                }
                if ((null != label) && (label.length() > 0))
                {
                    buffer.append(" label=\"").append(label).append("\"");
                }
                if (null != configuration)
                {
                    buffer.append(">\n").append(configuration).append("\n")
                        .append("</map:")
                        .append(category.substring(0, category.length() - 1))
                        .append(">\n");
                }
                else
                {
                    buffer.append("/>\n");
                }
                buffer.append(data.substring(pos)).toString();
                this.save(sitemapLocation, buffer.toString());
            }
        }
    }

    /**
     * Load a file and return the content as a string.
     */

    public String load(String filename)
        throws IOException
    {
        FileInputStream fis;

        fis = new FileInputStream(filename);
        int    available;
        byte[] data = null;
        byte[] tempData;
        byte[] copyData;

        do
        {
            available = 1024;
            tempData  = new byte[ available ];
            available = fis.read(tempData, 0, available);
            if (available > 0)
            {
                copyData = new byte[ ((data == null) ? 0
                                                     : data.length) + available ];
                if (data != null)
                {
                    System.arraycopy(data, 0, copyData, 0, data.length);
                }
                System.arraycopy(tempData, 0, copyData, ((data == null) ? 0
                                                                        : data.length), available);
                data = copyData;
            }
        }
        while (available > 0);
        fis.close();
        return ((data != null) ? new String(data)
                               : "");
    }

    /**
     * Save the string to a file
     */

    public void save(String filename, String data)
        throws IOException
    {
        FileWriter fw = new FileWriter(filename);

        fw.write(data);
        fw.close();
    }
}