/*
 *                 Sun Public License Notice
 *
 * The contents of this file are subject to the Sun Public License
 * Version 1.0 (the "License"). You may not use this file except in
 * compliance with the License. A copy of the License is available at
 * http://www.sun.com/
 *
 * The Original Code is NetBeans. The Initial Developer of the Original
 * Code is Sun Microsystems, Inc. Portions Copyright 1997-2003 Sun
 * Microsystems, Inc. All Rights Reserved.
 */

package org.netbeans.modules.tasklist.core.translators;

import java.io.*;
import java.lang.reflect.InvocationTargetException;
import javax.swing.tree.TreeNode;
import org.netbeans.modules.tasklist.core.ColumnProperty;
import org.netbeans.modules.tasklist.core.TLUtils;
import org.netbeans.modules.tasklist.core.TaskList;
import org.netbeans.modules.tasklist.core.TaskListView;
import org.openide.explorer.view.Visualizer;
import org.openide.filesystems.FileObject;
import org.openide.nodes.Node;
import org.openide.util.NbBundle;
import org.xml.sax.SAXException;

/**
 * This class exports a given TaskListView to XML
 */
public class XMLTranslator extends org.netbeans.modules.tasklist.core.translators.AbstractTranslator {
    public String getDefaultExtension() {
        return "xml"; // NOI18N
    }
    
    public String getImportName() {
        return null;
    }
    
    public String getExportName() {
        return NbBundle.getMessage(XMLTranslator.class, "XML"); // NOI18N
    }
    
    public boolean supportsImport() {
        return false;
    }
    
    public boolean supportsExport() {
        return true;
    }
    
    protected String getExportDialogTitle() {
        return NbBundle.getMessage(XMLTranslator.class, "ExportXML"); // NOI18N
    }
    
    protected String getImportDialogTitle() {
        return null;
    }
    
    public boolean writeList(TaskList list, OutputStream out,
    boolean interactive, File dir) throws IOException {
        Writer writer = new OutputStreamWriter(out, "utf8");  // NOI18N
        XMLCreator c = new XMLCreator(new XMLSerializer(writer));
        try {
            c.startDocument();
            c.e("tasklist"); // NOI18N


            TaskListView view = TaskListView.getCurrent();
            if (view.getList() == list) {
                // we use here visualizer because we want to export visible nodes
                TreeNode tn = Visualizer.findVisualizer(view.getEffectiveRoot());
                for (int i = 0; i < tn.getChildCount(); i++) {
                    exportNode(view, c, tn.getChildAt(i));
                }
            } else {
                // if we want to support export based on visibility (filters and expansion)
                // we must rework translator interface
                // other possibilty is to rewrite implemntation to export
                // all content unconditionally
                assert false : "Unimlemented for nonactivated tasklist views!";
            }

            c.ee();
            c.endDocument();
            writer.flush();
        } catch (SAXException e) {
            throw new IOException(e.getMessage());
        }
        return true;
    }
    
    protected void exportDone(FileObject file) {
    }
    
    protected void exportDone(File file) {
    }

    /**
     * Exports one node
     *
     * @param v a task list view
     * @param c output
     * @param tn a node
     */
    private void exportNode(TaskListView v, XMLCreator c, TreeNode tn) 
    throws SAXException {
        Node n = Visualizer.findNode(tn);
        c.e("item"); // NOI18N
        c.e("displayName"); // NOI18N
        c.ch(n.getDisplayName());
        c.ee();
        ColumnProperty[] columns = v.getVisibleColumns();
        for (int i = 1; i < columns.length; i++) {
            c.e(columns[i].getName());
            Node.Property p = TLUtils.getProperty(n, columns[i].getName());
            Object value;
            try {
                value = p == null ? "" : p.getValue(); // NOI18N
            } catch (IllegalAccessException e) {
                value = ""; // NOI18N
            } catch (InvocationTargetException e) {
                value = ""; // NOI18N
            }
            c.ch(value == null ? "" : value.toString()); // NOI18N
            c.ee();
        }
        
        for (int i = 0; i < tn.getChildCount(); i++) {
            exportNode(v, c, tn.getChildAt(i));
        }
        c.ee();
    }
}