TraineesListPresenter.java

/*******************************************************************************
 * Copyright 2011 Antti Havanko
 * 
 * This file is part of Motiver.fi.
 * Motiver.fi is licensed under one open source license and one commercial license.
 * 
 * Commercial license: This is the appropriate option if you want to use Motiver.fi in 
 * commercial purposes. Contact license@motiver.fi for licensing options.
 * 
 * Open source license: This is the appropriate option if you are creating an open source 
 * application with a license compatible with the GNU GPL license v3. Although the GPLv3 has 
 * many terms, the most important is that you must provide the source code of your application 
 * to your users so they can be free to modify your application for their own needs.
 ******************************************************************************/
package com.delect.motiver.client.presenter.coach;

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;

import com.google.gwt.core.client.GWT;
import com.google.gwt.event.shared.SimpleEventBus;
import com.google.gwt.http.client.Request;

import com.delect.motiver.client.AppController;
import com.delect.motiver.client.Motiver;
import com.delect.motiver.client.MyAsyncCallback;
import com.delect.motiver.client.presenter.EmptyPresenter;
import com.delect.motiver.client.presenter.EmptyPresenter.EmptyDisplay;
import com.delect.motiver.client.presenter.Presenter;
import com.delect.motiver.client.presenter.UserPresenter;
import com.delect.motiver.client.presenter.UserPresenter.UserDisplay;
import com.delect.motiver.client.service.MyServiceAsync;
import com.delect.motiver.client.view.Display;
import com.delect.motiver.client.view.EmptyView;
import com.delect.motiver.client.view.UserView;
import com.delect.motiver.shared.UserModel;

import com.extjs.gxt.ui.client.widget.LayoutContainer;

public class TraineesListPresenter extends Presenter {

	/**
	* Abstract class for view to extend
	*/
	public abstract static class TraineesListDisplay extends Display {
		public abstract LayoutContainer getTraineesContainer();
	}
	private TraineesListDisplay display;

	private EmptyPresenter emptyPresenter;
	//child presenters
	private List<Presenter> userPresenters = new ArrayList<Presenter>();
	
	/**
	 * 
	 * @param rpcService
	 * @param eventBus
	 * @param display
	 */
	public TraineesListPresenter(MyServiceAsync rpcService, SimpleEventBus eventBus, TraineesListDisplay display) {
		super(rpcService, eventBus);
		this.display = display;
		
	}


	@Override
	public Display getView() {
		return display;
	}

	@Override
	public void onRun() {

		//add empty presenter
		emptyPresenter = new EmptyPresenter(rpcService, eventBus, (EmptyDisplay)GWT.create(EmptyView.class), EmptyPresenter.EMPTY_LOADING_SMALL);
		emptyPresenter.run(display.getBaseContainer());

		final Request req = rpcService.getTrainees(new MyAsyncCallback<List<UserModel>>() {
			@Override
			public void onSuccess(List<UserModel> result) {
				showTrainees(result);
      }
		});
		addRequest(req);
	}


	@Override
	public void onStop() {
		//stop presenters
		unbindPresenters();
	}


	/**
	 * Shows friends (multiple UserPresenters)
	 * @param list : UserModels
	 */
	private void showTrainees(List<UserModel> list) {

		try {
			unbindPresenters();
			
			//if no workouts
			if(list.size() == 0) {
				emptyPresenter = new EmptyPresenter(rpcService, eventBus, (EmptyDisplay)GWT.create(EmptyView.class), AppController.Lang.NoTrainees(), EmptyPresenter.OPTION_SMALLER_LEFT_ALIGN);
				emptyPresenter.run(display.getTraineesContainer());
			}
			else {
				
				Collections.sort(list);
				
				for(UserModel m : list) {
					//new presenter
					final UserPresenter wp = new UserPresenter(rpcService, eventBus, (UserDisplay) GWT.create(UserView.class), m, true);
					addNewPresenter(wp);
					
				}
			}
			
		} catch (Exception e) {
      Motiver.showException(e);
		}
	}

	/**
	 * Unbinds all the presenters
	 */
	private void unbindPresenters() {

		if(emptyPresenter != null) {
      emptyPresenter.stop();
    }
		if(userPresenters != null) {				
			for(int i=0; i < userPresenters.size(); i++) {
				final Presenter presenter = userPresenters.get(i);
				if(presenter != null) {
					presenter.stop();
				}
			}
			userPresenters.clear();
		}
	}

	/**
	 * Adds new presenter to view
	 * @param presenter
	 */
	protected void addNewPresenter(Presenter presenter) {
		
		try {
			//remove emptypresenter if present
			if(emptyPresenter != null) {
				emptyPresenter.stop();
				emptyPresenter = null;
			}
			
			userPresenters.add(presenter);
			presenter.run(display.getTraineesContainer());
			
		} catch (Exception e) {
      Motiver.showException(e);
		}
	}
}