/*
* Copyright (c) 2011 Google Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not
* use this file except in compliance with the License. You may obtain a copy of
* the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations under
* the License.
*/
package com.google.api.gwt.samples.urlshortener.client;
import com.google.api.gwt.client.impl.ClientGoogleApiRequestTransport;
import com.google.api.gwt.client.impl.ClientOAuth2Login;
import com.google.api.gwt.samples.urlshortener.shared.Url;
import com.google.api.gwt.samples.urlshortener.shared.Urlshortener;
import com.google.api.gwt.samples.urlshortener.shared.Urlshortener.UrlContext;
import com.google.api.gwt.samples.urlshortener.shared.UrlshortenerAuthScope;
import com.google.api.gwt.shared.GoogleApiRequestTransport;
import com.google.gwt.core.client.EntryPoint;
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.SimpleEventBus;
import com.google.gwt.user.client.Window;
import com.google.gwt.user.client.ui.Button;
import com.google.gwt.user.client.ui.RootPanel;
import com.google.web.bindery.requestfactory.shared.Receiver;
import com.google.web.bindery.requestfactory.shared.ServerFailure;
/**
* Simple sample app that retrieves information about a short URL and shortens a
* long URL.
*
* @author jasonhall@google.com (Jason Hall)
*/
public class UrlshortenerEntryPoint implements EntryPoint {
private static final String CLIENT_ID = "692753340433.apps.googleusercontent.com";
private static final String API_KEY = "AIzaSyA5bNyuRQFaTQle_YC5BUH7tQzRmAPiqsM";
private static final String APPLICATION_NAME = "UrlshortenerSample/1.0";
private final Urlshortener urlShortener = GWT.create(Urlshortener.class);
@Override
public void onModuleLoad() {
login();
}
/** Demonstrates authentication using OAuth 2.0. */
private void login() {
final Button button = new Button("Log in to get started");
button.addClickHandler(new ClickHandler() {
@Override
public void onClick(ClickEvent event) {
new ClientOAuth2Login(CLIENT_ID)
.withScopes(UrlshortenerAuthScope.URLSHORTENER)
.login(new Receiver<String>() {
@Override
public void onSuccess(String accessToken) {
initialize(accessToken);
}
});
button.setVisible(false);
}
});
RootPanel.get().add(button);
}
/** Demonstrates initialization of the RequestTransport. */
private void initialize(String accessToken) {
new ClientGoogleApiRequestTransport()
.setApiAccessKey(API_KEY)
.setApplicationName(APPLICATION_NAME)
.setAccessToken(accessToken)
.create(new Receiver<GoogleApiRequestTransport>() {
@Override
public void onSuccess(GoogleApiRequestTransport transport) {
urlShortener.initialize(new SimpleEventBus(), transport);
expand();
}
@Override
public void onFailure(ServerFailure error) {
Window.alert("Failed to initialize Transport");
}
});
}
/** Demonstrates expanding a short URL by requesting its information. */
private void expand() {
String shortUrl = Window.prompt("Enter a short URL", "http://goo.gl/xwrT5");
// Get a new RequestContext which we will execute.
UrlContext urlContext = urlShortener.url();
// Fire a get() request with the short URL we want to expand.
urlContext.get(shortUrl).fire(new Receiver<Url>() {
@Override
public void onSuccess(Url response) {
Window.alert("Long URL: " + response.getLongUrl() + "\n" //
+ "Short URL: " + response.getId() + "\n" //
+ "Status: " + response.getStatus());
shorten();
}
@Override
public void onFailure(ServerFailure error) {
Window.alert("Error expanding a URL\n" + error.getMessage());
}
});
}
/** Demonstrates shortening a URL by inserting a new {@link Url} object. */
private void shorten() {
String longUrl = Window.prompt("Enter a long URL",
"http://gwt-google-apis.googlecode.com/svn/trunk/apis/samples/urlshortener/demo/"
+ "urlshortener.html");
// Get a new RequestContext which we will execute.
UrlContext urlContext = urlShortener.url();
// Create a new Url instance with the longUrl we want to insert.
Url url = urlContext.create(Url.class).setLongUrl(longUrl);
// Fire an insert() request with the Url to insert.
urlContext.insert(url).fire(new Receiver<Url>() {
@Override
public void onSuccess(Url response) {
Window.alert("Long URL: " + response.getLongUrl() + "\n" //
+ "Short URL: " + response.getId() + "\n" //
+ "Status: " + response.getStatus());
}
@Override
public void onFailure(ServerFailure error) {
Window.alert("Error shortening a URL\n" + error.getMessage());
}
});
}
}