Dean.java

package kornell.gui.client.personnel;

import static kornell.core.util.StringUtils.isSome;
import static kornell.core.util.StringUtils.mkurl;

import com.google.gwt.core.client.Callback;
import com.google.gwt.dom.client.Document;
import com.google.gwt.user.client.Timer;
import com.google.web.bindery.event.shared.EventBus;

import kornell.api.client.KornellSession;
import kornell.core.to.UnreadChatThreadTO;
import kornell.gui.client.event.LogoutEvent;
import kornell.gui.client.event.LogoutEventHandler;
import kornell.gui.client.event.UnreadMessagesCountChangedEvent;
import kornell.gui.client.event.UnreadMessagesCountChangedEventHandler;
import kornell.gui.client.event.UnreadMessagesPerThreadFetchedEvent;
import kornell.gui.client.event.UnreadMessagesPerThreadFetchedEventHandler;
import kornell.gui.client.util.CSSInjector;
import kornell.gui.client.util.view.KornellMaintenance;

public class Dean implements LogoutEventHandler, UnreadMessagesPerThreadFetchedEventHandler,
		UnreadMessagesCountChangedEventHandler {

	private String ICON_NAME = "favicon.ico";
	private String DEFAULT_SITE_TITLE = "Kornell";
	private EventBus bus;
	private KornellSession session;
	private int totalCount;

	public Dean(EventBus bus, KornellSession session) {
		this.bus = bus;
		this.session = session;

		bus.addHandler(LogoutEvent.TYPE, this);
		bus.addHandler(UnreadMessagesPerThreadFetchedEvent.TYPE, this);
		bus.addHandler(UnreadMessagesCountChangedEvent.TYPE, this);

		initInstitutionAssets();
	}

	private void initInstitutionAssets() {
		showContentNative(false);
		
		setFavicon();
		setPageTitle();
		setSkin();
	}
	
	private void setFavicon(){
		String url = session.getAssetsURL();
		if (url != null) {
			updateFaviconNative(mkurl(url, ICON_NAME));
		} else {
			updateFaviconNative(ICON_NAME);
		}
	}

	private void setSkin() {
		Callback<Void, Exception> callback = new Callback<Void, Exception>() {
			public void onFailure(Exception reason) {
				KornellMaintenance.show();
			}

			public void onSuccess(Void result) {
				showContentNative(true);
			}
		};

		String skinName = isSome(session.getInstitution().getSkin()) ? session.getInstitution().getSkin() : "";
		
		CSSInjector.updateSkin(skinName, callback);
	}
	

	private void setPageTitle() {
		String name = session.getInstitution().getFullName();
		String title = DEFAULT_SITE_TITLE;
		if (name != null) {
			title = name;
			if (totalCount > 0)
				title = "(" + totalCount + ") " + name;
		}
		Document.get().setTitle(title);
	}

	@Override
	public void onUnreadMessagesPerThreadFetched(UnreadMessagesPerThreadFetchedEvent event) {
		int count = 0;
		for (UnreadChatThreadTO unreadChatThreadTO : event.getUnreadChatThreadTOs()) {
			count = count + Integer.parseInt(unreadChatThreadTO.getUnreadMessages());
		}
		totalCount = count;
		setPageTitle();
	}

	@Override
	public void onUnreadMessagesCountChanged(UnreadMessagesCountChangedEvent event) {
		totalCount = event.isIncrement() ? totalCount + event.getCountChange() : totalCount - event.getCountChange();
		setPageTitle();
	}

	@Override
	public void onLogout() {
		showBodyNative(false);
	}

	private static native void updateFaviconNative(String url) /*-{
		var link = $wnd.document.createElement('link'), oldLink = $wnd.document
				.getElementById('icon');
		link.id = 'icon';
		link.rel = 'shortcut icon';
		link.type = 'image/x-icon';
		link.href = url;
		if (oldLink) {
			$wnd.document.head.removeChild(oldLink);
		}

		$wnd.document.getElementsByTagName('head')[0].appendChild(link);
	}-*/;

	public static native void showContentNative(boolean show) /*-{
		var menuBar = $wnd.document.getElementsByClassName('menuBar'),
			vScrollBar = $wnd.document.getElementsByClassName('vScrollBar'),
			activityBarWrapper = $wnd.document.getElementsByClassName('activityBarWrapper'),
			style = 'display: ' + (show ? 'block' : 'none');
		if(menuBar && menuBar.length){
			menuBar[0].setAttribute('style', style);
		}
		if(vScrollBar && vScrollBar.length){
			vScrollBar[0].setAttribute('style', style);
		}
		if(activityBarWrapper && activityBarWrapper.length){
			activityBarWrapper[0].setAttribute('style', style);
		}
	}-*/;

	private static native void showBodyNative(boolean show) /*-{
		$wnd.document.getElementsByTagName('body')[0].setAttribute('style',
				'display: ' + (show ? 'block' : 'none'));
	}-*/;

}