SendContextContributionItem.java

/*******************************************************************************
 * Copyright (c) 2007, 2008 IBM Corporation and others.
 * 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:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.ecf.internal.mylyn.ui;

import java.io.ByteArrayOutputStream;
import org.eclipse.core.commands.ExecutionEvent;
import org.eclipse.core.commands.ExecutionException;
import org.eclipse.core.runtime.*;
import org.eclipse.core.runtime.jobs.Job;
import org.eclipse.ecf.core.identity.ID;
import org.eclipse.ecf.core.identity.IDCreateException;
import org.eclipse.ecf.datashare.IChannel;
import org.eclipse.ecf.datashare.IChannelContainerAdapter;
import org.eclipse.ecf.presence.IPresenceContainerAdapter;
import org.eclipse.ecf.presence.roster.IRosterEntry;
import org.eclipse.ecf.presence.ui.menu.AbstractRosterMenuContributionItem;
import org.eclipse.ecf.presence.ui.menu.AbstractRosterMenuHandler;
import org.eclipse.jface.action.IContributionItem;
import org.eclipse.jface.viewers.*;
import org.eclipse.mylyn.internal.tasks.core.AbstractTask;
import org.eclipse.mylyn.internal.tasks.ui.TasksUiPlugin;
import org.eclipse.mylyn.tasks.core.ITask;
import org.eclipse.ui.IWorkbenchPart;
import org.eclipse.ui.IWorkbenchSite;
import org.eclipse.ui.handlers.HandlerUtil;

public class SendContextContributionItem extends AbstractRosterMenuContributionItem {

	public SendContextContributionItem() {
		setTopMenuName("Send Context");
		setTopMenuImageDescriptor(Activator.getDefault().getImageRegistry().getDescriptor("IMG_SHARED_TASK"));
	}

	protected IContributionItem[] createContributionItemsForPresenceContainer(IPresenceContainerAdapter presenceContainerAdapter) {
		// if this IPCA doesn't support the datashare APIs, we should not create any contribution items 
		IChannelContainerAdapter channelAdapter = (IChannelContainerAdapter) presenceContainerAdapter.getAdapter(IChannelContainerAdapter.class);
		if (channelAdapter == null) {
			return new IContributionItem[0];
		}
		return super.createContributionItemsForPresenceContainer(presenceContainerAdapter);
	}

	protected AbstractRosterMenuHandler createRosterEntryHandler(final IRosterEntry rosterEntry) {
		return new AbstractRosterMenuHandler(rosterEntry) {
			public Object execute(ExecutionEvent event) throws ExecutionException {
				IWorkbenchPart part = HandlerUtil.getActivePart(event);
				if (part == null) {
					return null;
				}
				IWorkbenchSite site = part.getSite();
				if (site == null) {
					return null;
				}
				ISelectionProvider provider = site.getSelectionProvider();
				if (provider == null) {
					return null;
				}
				ISelection selection = provider.getSelection();
				if (selection instanceof IStructuredSelection) {
					IChannelContainerAdapter icca = (IChannelContainerAdapter) rosterEntry.getRoster().getPresenceContainerAdapter().getAdapter(IChannelContainerAdapter.class);
					ID channelID;
					try {
						channelID = icca.getChannelNamespace().createInstance(new Object[] {Activator.PLUGIN_ID});
					} catch (IDCreateException e1) {
						return null;
					}
					final IChannel channel = icca.getChannel(channelID);
					if (channel == null) {
						return null;
					}
					Object element = ((IStructuredSelection) selection).getFirstElement();
					if (element instanceof ITask) {
						final ITask task = (ITask) element;
						Job job = new Job("Send Task") {
							protected IStatus run(IProgressMonitor monitor) {
								monitor.beginTask("Sending task...", 5);
								ByteArrayOutputStream stream = new ByteArrayOutputStream();
								TasksUiPlugin.getTaskListManager().getTaskListWriter().writeTask((AbstractTask) task, stream);
								monitor.worked(2);
								try {
									channel.sendMessage(getRosterEntry().getUser().getID(), stream.toByteArray());
									monitor.worked(3);
								} catch (Exception e) {
									return new Status(IStatus.ERROR, Activator.PLUGIN_ID, "An error occurred while sending the task.", e);
								} finally {
									monitor.done();
								}
								return Status.OK_STATUS;
							}
						};
						job.schedule();
					}
				}
				return null;
			}

		};
	}
}