/*******************************************************************************
* 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.nutrition;
import java.util.ArrayList;
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.ShowMorePresenter;
import com.delect.motiver.client.presenter.ShowMorePresenter.ShowMoreDisplay;
import com.delect.motiver.client.presenter.ShowMorePresenter.ShowMoreHandler;
import com.delect.motiver.client.presenter.nutrition.MealLinkPresenter.MealLinkDisplay;
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.ShowMoreView;
import com.delect.motiver.client.view.nutrition.MealLinkView;
import com.delect.motiver.shared.Constants;
import com.delect.motiver.shared.MealModel;
/**
* List of meals
* <br>Launch MealSelectEvent when meal is selected
* <br>Unbinds itself after event
*/
public class MealsListSearchPresenter extends Presenter {
/**
* Abstract class for view to extend
*/
public abstract static class MealsListSearchDisplay extends Display {
}
private MealsListSearchDisplay display;
private EmptyPresenter emptyPresenter;
private String query = "";
private boolean quickSelectionEnabled;
//child presenters
private List<Presenter> searchResultsPresenters = new ArrayList<Presenter>();
private ShowMorePresenter showMorePresenter;
public MealsListSearchPresenter(MyServiceAsync rpcService, SimpleEventBus eventBus, MealsListSearchDisplay display, String query, boolean quickSelectionEnabled) {
super(rpcService, eventBus);
this.display = display;
this.query = query;
this.quickSelectionEnabled = quickSelectionEnabled;
}
/*
* VIEW 2 (search results)
*/
@Override
public Display getView() {
return display;
}
@Override
public void onRun() {
loadSearch(0, query);
}
@Override
public void onStop() {
if(emptyPresenter != null) {
emptyPresenter.stop();
}
//stop show more
if(showMorePresenter != null) {
showMorePresenter.stop();
}
//stop presenters
unbindSearchPresenters();
}
/**
* Shows meals (multiple SingleMealPresenters)
* @param list : MealModels
* @param openFirst : open first meal
*/
private void showSearch(final int index, final String query, List<MealModel> list) {
try {
if(emptyPresenter != null) {
emptyPresenter.stop();
}
if(showMorePresenter != null) {
showMorePresenter.stop();
}
//stop presenters if first items
if(index == 0) {
unbindSearchPresenters();
}
//if no meals
if(index == 0 && list.size() == 0) {
emptyPresenter = new EmptyPresenter(rpcService, eventBus, (EmptyDisplay)GWT.create(EmptyView.class), AppController.Lang.NoMealsFound());
emptyPresenter.run(display.getBaseContainer());
}
else {
for(final MealModel m : list) {
//if null value -> list was limited -> add showMorePresenter
if(m == null) {
showMorePresenter = new ShowMorePresenter(rpcService, eventBus, (ShowMoreDisplay)GWT.create(ShowMoreView.class), new ShowMoreHandler() {
@Override
public void showMore() {
loadSearch(index + Constants.LIMIT_WORKOUTS, query);
}
});
showMorePresenter.run(display.getBaseContainer());
}
else {
//new presenter
final MealLinkPresenter wp = new MealLinkPresenter(rpcService, eventBus, (MealLinkDisplay)GWT.create(MealLinkView.class), m, quickSelectionEnabled);
addNewSearchResultsPresenter(wp);
}
}
}
} catch (Exception e) {
Motiver.showException(e);
}
}
/**
* Unbinds all the presenters
*/
private void unbindSearchPresenters() {
//search results
if(searchResultsPresenters != null) {
if(emptyPresenter != null) {
emptyPresenter.stop();
}
//stop show more
if(showMorePresenter != null) {
showMorePresenter.stop();
}
for(int i=0; i < searchResultsPresenters.size(); i++) {
final Presenter presenter = searchResultsPresenters.get(i);
if(presenter != null) {
presenter.stop();
}
}
searchResultsPresenters.clear();
}
}
/**
* Adds new presenter to view
* @param presenter
*/
protected void addNewSearchResultsPresenter(Presenter presenter) {
try {
//remove emptypresenter if present
if(emptyPresenter != null) {
emptyPresenter.stop();
emptyPresenter = null;
}
searchResultsPresenters.add(presenter);
presenter.run(display.getBaseContainer());
} catch (Exception e) {
Motiver.showException(e);
}
}
/**
* Loads meals
*/
void loadSearch(final int index, final String query) {
if(emptyPresenter != null) {
emptyPresenter.stop();
}
if(showMorePresenter != null) {
showMorePresenter.stop();
}
//stop presenters if first items
if(index == 0) {
unbindSearchPresenters();
}
//add empty presenter
emptyPresenter = new EmptyPresenter(rpcService, eventBus, (EmptyDisplay)GWT.create(EmptyView.class), EmptyPresenter.EMPTY_LOADING);
emptyPresenter.run(display.getBaseContainer());
//search meals
final Request req = rpcService.searchMeals(index, query, new MyAsyncCallback<List<MealModel>>() {
@Override
public void onSuccess(List<MealModel> result) {
showSearch(index, query, result);
}
});
addRequest(req);
}
}