PeopleMultipleSelect.java

package kornell.gui.client.util.forms.formfield;

import java.util.HashMap;
import java.util.Map;

import com.github.gwtbootstrap.client.ui.ListBox;
import com.github.gwtbootstrap.client.ui.TextBox;
import com.github.gwtbootstrap.client.ui.Typeahead;
import com.google.gwt.core.client.GWT;
import com.google.gwt.event.dom.client.ClickEvent;
import com.google.gwt.event.dom.client.ClickHandler;
import com.google.gwt.event.dom.client.KeyUpEvent;
import com.google.gwt.event.dom.client.KeyUpHandler;
import com.google.gwt.user.client.Timer;
import com.google.gwt.user.client.ui.Button;
import com.google.gwt.user.client.ui.Composite;
import com.google.gwt.user.client.ui.FlowPanel;
import com.google.gwt.user.client.ui.MultiWordSuggestOracle;
import com.google.gwt.user.client.ui.Widget;

import kornell.api.client.Callback;
import kornell.api.client.KornellSession;
import kornell.core.entity.Person;
import kornell.core.to.PeopleTO;
import kornell.core.to.PersonTO;
import kornell.core.util.StringUtils;
import kornell.gui.client.util.forms.FormHelper;

public class PeopleMultipleSelect extends Composite {
	private FormHelper formHelper = GWT.create(FormHelper.class);

	private KornellSession session;
	private TextBox search;
	private MultiWordSuggestOracle oracle;
	private ListBox multipleSelect;
	private Map<String, Person> oraclePeople;

	public PeopleMultipleSelect(KornellSession session) {
		this.session = session;
	}

	@Override
	public Widget asWidget() {
		return getPeopleMultipleSelectPanel();
	}

	private FlowPanel getPeopleMultipleSelectPanel() {
		FlowPanel courseClassAdminsPanel = new FlowPanel();
		courseClassAdminsPanel.addStyleName("fieldPanel");

		courseClassAdminsPanel.add(getTypeAheadPanel());
		FlowPanel multipleSelectPanel = getMultipleSelectPanel();
		courseClassAdminsPanel.add(multipleSelectPanel);

		return courseClassAdminsPanel;
	}

	private FlowPanel getMultipleSelectPanel() {
		FlowPanel multipleSelectPanel = new FlowPanel();
		multipleSelect = new ListBox(true);
		multipleSelect.addStyleName("selectField");

		multipleSelectPanel.add(multipleSelect);

		Button btnRemove = new Button("Remover");
		btnRemove.addStyleName("btnSelected btnStandard");

		btnRemove.addClickHandler(new ClickHandler() {
			@Override
			public void onClick(ClickEvent event) {
				while (multipleSelect.getSelectedIndex() != -1) {
					multipleSelect.removeItem(multipleSelect.getSelectedIndex());
				}
			}
		});
		multipleSelectPanel.add(btnRemove);

		return multipleSelectPanel;
	}

	private FlowPanel getTypeAheadPanel() {
		FlowPanel typeaheadPanel = new FlowPanel();
		Typeahead typeahead = new Typeahead();
		search = new TextBox();
		search.addStyleName("textField");
		search.setPlaceholder("Digite o nome de usuário a adicionar");

		search.addKeyUpHandler(new KeyUpHandler() {
			String currentSearch = "";
			String previousSearch = "";

			Timer searchChangesTimer = new Timer() {
				@Override
				public void run() {
					searchChanged(currentSearch);
				}
			};

			@Override
			public void onKeyUp(KeyUpEvent event) {
				currentSearch = search.getText();
				if (currentSearch.length() >= 1
						&& (!currentSearch.equals(previousSearch) || event.getNativeKeyCode() == 86 || event.getNativeKeyCode() == 17)) {
					searchChangesTimer.cancel();
					searchChangesTimer.schedule(100);
				}
				previousSearch = currentSearch;
			}
		});

		typeahead.add(search);

		oracle = (MultiWordSuggestOracle) typeahead.getSuggestOracle();

		typeaheadPanel.add(typeahead);

		Button btnAdd = new Button("Adicionar");
		btnAdd.addStyleName("btnAction btnStandard");

		btnAdd.addClickHandler(new ClickHandler() {
			@Override
			public void onClick(ClickEvent event) {
				addAdmin();
			}
		});

		typeaheadPanel.add(btnAdd);

		return typeaheadPanel;
	}

	private void searchChanged(final String searchStr) {
		session.people().findBySearchTerm(searchStr, session.getInstitution().getUUID(),
				new Callback<PeopleTO>() {
					@Override
					public void ok(PeopleTO to) {
						oraclePeople = new HashMap<String, Person>();
						oracle.clear();
						String username, oracleStr = "";
						Person person;
						int i = 0;
						for (PersonTO personTO : to.getPeopleTO()) {
							person = personTO.getPerson();
							username = personTO.getUsername();
							oracleStr = username
									+ (StringUtils.isSome(person.getFullName()) ? 
											" (" + person.getFullName() + ")" : "");
							oracle.add(oracleStr);
							oraclePeople.put(username, person);
							if (++i == 10)
								break;
						}
						if(to.getPeopleTO().size() == 1){
							Person p = oraclePeople.get(searchStr);
							if(p != null){
								search.setText(oracleStr);
							}
						}					
					}
				});
	}

	private void addAdmin() {
		String item = search.getText().split(" \\(")[0];
		if (oraclePeople != null && oraclePeople.containsKey(item)) {
			if (!formHelper.isItemInListBox(search.getText(), multipleSelect)) {
				Person person = (Person) oraclePeople.get(item);
				multipleSelect.addItem(search.getText(), person.getUUID());
			}
			search.setText("");
		}
	}

	public ListBox getMultipleSelect() {
		return multipleSelect;
	}

	public void addItem(String item, String uuid) {
		multipleSelect.addItem(item, uuid);
	}
}