Several files: Use final for the parameters and use the @override attribute.

[online-glom:gwt-glom.git] / src / main / java / org / glom / web / client / activity / ListActivity.java

/*
 * Copyright (C) 2011 Openismus GmbH
 *
 * This file is part of GWT-Glom.
 *
 * GWT-Glom is free software: you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as published by the
 * Free Software Foundation, either version 3 of the License, or (at your
 * option) any later version.
 *
 * GWT-Glom is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License
 * for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with GWT-Glom.  If not, see <http://www.gnu.org/licenses/>.
 */

package org.glom.web.client.activity;

import org.glom.web.client.ClientFactory;
import org.glom.web.client.OnlineGlomServiceAsync;
import org.glom.web.client.event.TableChangeEvent;
import org.glom.web.client.event.TableChangeEventHandler;
import org.glom.web.client.place.DocumentSelectionPlace;
import org.glom.web.client.place.ListPlace;
import org.glom.web.client.ui.AuthenticationPopup;
import org.glom.web.client.ui.ListView;
import org.glom.web.client.ui.View;
import org.glom.web.shared.layout.LayoutGroup;

import com.google.gwt.activity.shared.AbstractActivity;
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.shared.EventBus;
import com.google.gwt.place.shared.Place;
import com.google.gwt.user.client.rpc.AsyncCallback;
import com.google.gwt.user.client.ui.AcceptsOneWidget;

public class ListActivity extends AbstractActivity implements View.Presenter {

        private final String documentID;
        private final String tableName;
        private final ClientFactory clientFactory;
        private final ListView listView;
        private final AuthenticationPopup authenticationPopup;

        public ListActivity(final ListPlace place, final ClientFactory clientFactory) {
                this.documentID = place.getDocumentID();
                this.tableName = place.getTableName();
                this.clientFactory = clientFactory;
                listView = clientFactory.getListView();
                authenticationPopup = clientFactory.getAuthenticationPopup();
        }

        @Override
        public void start(final AcceptsOneWidget panel, final EventBus eventBus) {
                if (documentID.isEmpty())
                        goTo(new DocumentSelectionPlace());

                // register this class as the presenter
                listView.setPresenter(this);

                // TODO this should really be it's own Place/Activity
                // check if the authentication info has been set for the document
                final AsyncCallback<Boolean> isAuthCallback = new AsyncCallback<Boolean>() {
                        @Override
                        public void onFailure(final Throwable caught) {
                                // TODO: create a way to notify users of asynchronous callback failures
                                GWT.log("AsyncCallback Failed: OnlineGlomService.isAuthenticated()");
                        }

                        @Override
                        public void onSuccess(final Boolean result) {
                                if (!result) {
                                        setUpAuthClickHandler(eventBus);
                                        authenticationPopup.center();
                                }
                        }
                };
                OnlineGlomServiceAsync.Util.getInstance().isAuthenticated(documentID, isAuthCallback);

                // set the change handler for the table selection widget
                eventBus.addHandler(TableChangeEvent.TYPE, new TableChangeEventHandler() {
                        @Override
                        public void onTableChange(final TableChangeEvent event) {
                                goTo(new ListPlace(documentID, event.getNewTableName()));
                        }
                });

                // populate the cell table with data
                final AsyncCallback<LayoutGroup> callback = new AsyncCallback<LayoutGroup>() {
                        @Override
                        public void onFailure(final Throwable caught) {
                                // TODO: create a way to notify users of asynchronous callback failures
                                GWT.log("AsyncCallback Failed: OnlineGlomService.getListViewLayout()");
                        }

                        @Override
                        public void onSuccess(final LayoutGroup result) {
                                // TODO check if result.getTableName() is the same as the tableName field. Update it if it's not the
                                // same.
                                listView.setCellTable(documentID, result);
                        }
                };
                OnlineGlomServiceAsync.Util.getInstance().getListViewLayout(documentID, tableName, callback);

                // indicate that the view is ready to be displayed
                panel.setWidget(listView.asWidget());
        }

        private void setUpAuthClickHandler(final EventBus eventBus) {
                authenticationPopup.setClickOkHandler(new ClickHandler() {
                        @Override
                        public void onClick(final ClickEvent event) {
                                authenticationPopup.setTextFieldsEnabled(false);
                                final AsyncCallback<Boolean> callback = new AsyncCallback<Boolean>() {
                                        @Override
                                        public void onFailure(final Throwable caught) {
                                                // TODO: create a way to notify users of asynchronous callback failures
                                                GWT.log("AsyncCallback Failed: OnlineGlomService.checkAuthentication()");
                                        }

                                        @Override
                                        public void onSuccess(final Boolean result) {
                                                if (result) {
                                                        authenticationPopup.hide();
                                                        eventBus.fireEvent(new TableChangeEvent(clientFactory.getTableSelectionView()
                                                                        .getSelectedTableName()));
                                                } else {
                                                        authenticationPopup.setTextFieldsEnabled(true);
                                                        authenticationPopup.setError();
                                                }
                                        }
                                };
                                OnlineGlomServiceAsync.Util.getInstance().checkAuthentication(documentID,
                                                authenticationPopup.getUsername(), authenticationPopup.getPassword(), callback);
                        }

                });
        }

        private void clearView() {
                authenticationPopup.hide();
                authenticationPopup.clear();
                listView.clear();
        }

        /*
         * (non-Javadoc)
         * 
         * @see com.google.gwt.activity.shared.AbstractActivity#onCancel()
         */
        @Override
        public void onCancel() {
                clearView();
        }

        /*
         * (non-Javadoc)
         * 
         * @see com.google.gwt.activity.shared.AbstractActivity#onStop()
         */
        @Override
        public void onStop() {
                clearView();
        }

        /*
         * (non-Javadoc)
         * 
         * @see org.glom.web.client.ui.View.Presenter#goTo(com.google.gwt.place.shared.Place)
         */
        @Override
        public void goTo(final Place place) {
                clientFactory.getPlaceController().goTo(place);
        }

}