ThisUserArticlesComposite.java

/*******************************************************************************
 *  Copyright (c) 2011 University Of Moratuwa
 *                                                                      
 * All rights reserved. This program and the accompanying materials     
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at             
 * http://www.eclipse.org/legal/epl-v10.html                            
 *                                                                      
 * Contributors:                                                        
 *    Isuru Udana - UI Integration in the Workbench
 *******************************************************************************/
package org.eclipse.ecf.salvo.ui.internal.dialogs;

import java.io.ByteArrayInputStream;

import org.apache.james.mime4j.codec.DecoderUtil;
import org.apache.james.mime4j.parser.MimeStreamParser;
import org.eclipse.ecf.protocol.nntp.core.DateParser;
import org.eclipse.ecf.protocol.nntp.core.Debug;
import org.eclipse.ecf.protocol.nntp.core.ServerStoreFactory;
import org.eclipse.ecf.protocol.nntp.model.IArticle;
import org.eclipse.ecf.protocol.nntp.model.INewsgroup;
import org.eclipse.ecf.protocol.nntp.model.SALVO;
import org.eclipse.ecf.salvo.ui.internal.MimeArticleContentHandler;
import org.eclipse.ecf.salvo.ui.internal.editor.ArticleWidgetBuilder;
import org.eclipse.jface.dialogs.MessageDialog;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.events.SelectionListener;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Table;
import org.eclipse.swt.widgets.TableColumn;
import org.eclipse.swt.widgets.TableItem;

public class ThisUserArticlesComposite extends Composite {
	private Composite articleBodyComposite;
	private IArticle[] articles;
	private Table articleTable;
	private TableColumn subjectColumn;
	private TableColumn DateColumn;

	public static void showArticles(Shell parentShell, INewsgroup newsgroup) {

		Shell shell = new Shell(parentShell, SWT.SHELL_TRIM);
		shell.setText("Articles by "
				+ newsgroup.getServer().getServerConnection().getUser()
				+ " in " + newsgroup.getNewsgroupName());

		new ThisUserArticlesComposite(shell, newsgroup, SWT.NULL);

		if (shell.getChildren().length != 0) { // check whether the composite is
												// already disposed due to
												// absence of articles
			shell.setLayout(new FillLayout());
			shell.open();
		}

	}

	public ThisUserArticlesComposite(Composite parent, INewsgroup newsgroup,
			int style) {

		super(parent, style);
		initUIComponents();
		initArticleList(newsgroup);

	}

	private void initUIComponents() {
		try {

			this.setLayout(new GridLayout());

			{
				articleTable = new Table(this, SWT.BORDER);
				articleTable.setHeaderVisible(true);
				articleTable.setLinesVisible(true);
				articleTable.setLayoutData(new GridData(SWT.FILL, SWT.FILL,
						true, true));

				subjectColumn = new TableColumn(articleTable, SWT.NONE);
				subjectColumn.setText("Subject");
				subjectColumn.setWidth(300);

				DateColumn = new TableColumn(articleTable, SWT.NONE);
				DateColumn.setText("Date");
				DateColumn.setWidth(50);

				articleTable.addSelectionListener(new SelectionListener() {

					public void widgetSelected(SelectionEvent arg0) {
						showArticleBody();
					}

					public void widgetDefaultSelected(SelectionEvent arg0) {
					}

				});

			}

			{
				articleBodyComposite = new Composite(this, SWT.BORDER);
				articleBodyComposite.setLayout(new GridLayout());
				articleBodyComposite.setLayoutData(new GridData(SWT.FILL,
						SWT.FILL, true, true));
			}

			this.layout();

		} catch (Exception e) {
			Debug.log(getClass(), e);
		}
	}

	private void initArticleList(INewsgroup newsgroup) {
		articles = ServerStoreFactory.instance().getServerStoreFacade()
				.getThisUserArticles(newsgroup);

		if (articles.length == 0) {
			MessageDialog.openError(new Shell(), "Salvo Newsreader",
					"You haven't posted any article in the selected Newsgroup");
			this.dispose();
		}

		for (IArticle article : articles) {

			TableItem tableItem = new TableItem(articleTable, SWT.NONE);
			tableItem.setText(0, DecoderUtil.decodeEncodedWords(article.getSubject()));
			tableItem.setText(1, DateParser.parseRFC822(article.getHeaderAttributeValue("Date:")).toString());

		}
	}

	private void showArticleBody() {
		IArticle article = articles[articleTable.getSelectionIndex()];
		StringBuffer buffer = new StringBuffer();

		try {

			String[] body = (String[]) ServerStoreFactory.instance()
					.getServerStoreFacade().getArticleBody(article);

			for (String line : body) {
				buffer.append(line + SALVO.CRLF);
			}

			MimeArticleContentHandler handler = new MimeArticleContentHandler(
					article);
			MimeStreamParser parser = new MimeStreamParser();
			parser.setContentHandler(handler);
			parser.parse(new ByteArrayInputStream(buffer.toString().getBytes()));

			if (!articleBodyComposite.isDisposed()) {
				for (Control child : articleBodyComposite.getChildren()) {
					child.dispose();
				}
			}

			ArticleWidgetBuilder.build(articleBodyComposite, article, handler);
			articleBodyComposite.layout(true);

		} catch (Exception e) {
			Debug.log(getClass(), e);
		}

	}

}