/*
 * $Header: /cvsroot/mvnforum/mvnforum/i18n/tool/Translate.java,v 1.3 2004/04/30 03:39:14 drjavanomous Exp $
 * $Revision: 1.3 $
 * $Date: 2004/04/30 03:39:14 $
 *
 * ====================================================================
 *
 * Copyright (C) 2002, 2003 by MyVietnam.net
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or any later version.
 *
 * All copyright notices regarding MyVietnam and MyVietnam CoreLib
 * MUST remain intact in the scripts and source code.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 *
 * Correspondence and Marketing Questions can be sent to:
 * info@MyVietnam.net
 *
 * @author: Minh Nguyen  minhnn@MyVietnam.net
 * @author: Mai  Nguyen  mai.nh@MyVietnam.net
 */
/*
 * The Apache Software License, Version 1.1
 *
 * Copyright (c) 2001-2002 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 acknowlegement:
 *       "This product includes software developed by the
 *        Apache Software Foundation (http://www.apache.org/)."
 *    Alternately, this acknowlegement may appear in the software itself,
 *    if and wherever such third-party acknowlegements normally appear.
 *
 * 4. The names "The Jakarta Project", "Ant", and "Apache Software
 *    Foundation" 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"
 *    nor may "Apache" appear in their names without prior written
 *    permission of the Apache Group.
 *
 * 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
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * 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/>.
 */
//package org.apache.tools.ant.taskdefs.optional.i18n;

import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.FileOutputStream;
import java.io.BufferedWriter;
import java.io.OutputStreamWriter;
import java.util.Vector;
import java.util.Hashtable;
import java.util.Locale;
import org.apache.tools.ant.BuildException;
import org.apache.tools.ant.Project;
import org.apache.tools.ant.DirectoryScanner;
import org.apache.tools.ant.types.FileSet;
import org.apache.tools.ant.util.FileUtils;
import org.apache.tools.ant.taskdefs.MatchingTask;

/**
 * Translates text embedded in files using Resource Bundle files.
 *
 * @author Magesh Umasankar
 */
public class Translate extends MatchingTask {

    /**
     * Family name of resource bundle
     */
    private String bundle;
    /**
     * Locale specific language of the resource bundle
     */
    private String bundleLanguage;
    /**
     * Locale specific country of the resource bundle
     */
    private String bundleCountry;
    /**
     * Locale specific variant of the resource bundle
     */
    private String bundleVariant;
    /**
     * Destination directory
     */
    private File toDir;
    /**
     * Source file encoding scheme
     */
    private String srcEncoding;
    /**
     * Destination file encoding scheme
     */
    private String destEncoding;
    /**
     * Resource Bundle file encoding scheme, defaults to srcEncoding
     */
    private String bundleEncoding;
    /**
     * Starting token to identify keys
     */
    private String startToken;
    /**
     * Ending token to identify keys
     */
    private String endToken;
    /**
     * Whether or not to create a new destination file.
     * Defaults to <code>false</code>.
     */
    private boolean forceOverwrite;
    /**
     * Vector to hold source file sets.
     */
    private Vector filesets = new Vector();
    /**
     * Holds key value pairs loaded from resource bundle file
     */
    private Hashtable resourceMap = new Hashtable();
    /**
     * Generated locale based on user attributes
     */
    private Locale locale;
    /**
     * Used to resolve file names.
     */
    private FileUtils fileUtils = FileUtils.newFileUtils();
    /**
     * Last Modified Timestamp of resource bundle file being used.
     */
    private long[] bundleLastModified = new long[7];
    /**
     * Last Modified Timestamp of source file being used.
     */
    private long srcLastModified;
    /**
     * Last Modified Timestamp of destination file being used.
     */
    private long destLastModified;
    /**
     * Has at least one file from the bundle been loaded?
     */
    private boolean loaded = false;

    /**
     * Sets Family name of resource bundle; required.
     */
    public void setBundle(String bundle) {
        this.bundle = bundle;
    }

    /**
     * Sets locale specific language of resource bundle; optional.
     */
    public void setBundleLanguage(String bundleLanguage) {
        this.bundleLanguage = bundleLanguage;
    }

    /**
     * Sets locale specific country of resource bundle; optional.
     */
    public void setBundleCountry(String bundleCountry) {
        this.bundleCountry = bundleCountry;
    }

    /**
     * Sets locale specific variant of resource bundle; optional.
     */
    public void setBundleVariant(String bundleVariant) {
        this.bundleVariant = bundleVariant;
    }

    /**
     * Sets Destination directory; required.
     */
    public void setToDir(File toDir) {
        this.toDir = toDir;
    }

    /**
     * Sets starting token to identify keys; required.
     */
    public void setStartToken(String startToken) {
        this.startToken = startToken;
    }

    /**
     * Sets ending token to identify keys; required.
     */
    public void setEndToken(String endToken) {
        this.endToken = endToken;
    }

    /**
     * Sets source file encoding scheme; optional,
     * defaults to encoding of local system.
     */
    public void setSrcEncoding(String srcEncoding) {
        this.srcEncoding = srcEncoding;
    }

    /**
     * Sets destination file encoding scheme; optional.  Defaults to source file
     * encoding
     */
    public void setDestEncoding(String destEncoding) {
        this.destEncoding = destEncoding;
    }

    /**
     * Sets Resource Bundle file encoding scheme; optional.  Defaults to source file
     * encoding
     */
    public void setBundleEncoding(String bundleEncoding) {
        this.bundleEncoding = bundleEncoding;
    }

    /**
     * Whether or not to overwrite existing file irrespective of
     * whether it is newer than the source file as well as the
     * resource bundle file.
     * Defaults to false.
     */
    public void setForceOverwrite(boolean forceOverwrite) {
        this.forceOverwrite = forceOverwrite;
    }

    /**
     * Adds a set of files to translate as a nested fileset element.
     */
    public void addFileset(FileSet set) {
        filesets.addElement(set);
    }

    /**
     * Check attributes values, load resource map and translate
     */
    public void execute() throws BuildException {
        if (bundle == null) {
            throw new BuildException("The bundle attribute must be set.",
									getLocation());
                                     
        }

        if (startToken == null) {
            throw new BuildException("The starttoken attribute must be set.",
									getLocation());
        }

        if (startToken.length() != 1) {
            throw new BuildException(
                "The starttoken attribute must be a single character.",
                                    getLocation());
        }
        			
        if (endToken == null) {
            throw new BuildException("The endtoken attribute must be set.",
                                     getLocation());
        }

        if (endToken.length() != 1) {
            throw new BuildException(
                "The endtoken attribute must be a single character.",
                                         getLocation());
        }

        if (bundleLanguage == null) {
            Locale l = Locale.getDefault();
            bundleLanguage  = l.getLanguage();
        }

        if (bundleCountry == null) {
            bundleCountry = Locale.getDefault().getCountry();
        }

        locale = new Locale(bundleLanguage, bundleCountry);