Java tutorial
/* * Copyright 2010 Nabeel Mukhtar * * 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.appspot.bitlyminous.handler.twitter; import java.util.ArrayList; import java.util.List; import java.util.logging.Level; import twitter4j.GeoLocation; import twitter4j.GeoQuery; import twitter4j.Place; import twitter4j.Status; import twitter4j.StatusUpdate; import twitter4j.Twitter; import twitter4j.TwitterFactory; import twitter4j.conf.ConfigurationBuilder; import twitter4j.http.AccessToken; import twitter4j.http.OAuthAuthorization; import com.appspot.bitlyminous.constant.ApplicationConstants; import com.appspot.bitlyminous.constant.ApplicationResources; import com.appspot.bitlyminous.entity.Tip; import com.appspot.bitlyminous.entity.Venue; import com.appspot.bitlyminous.gateway.FoursquareGateway; import com.appspot.bitlyminous.gateway.GatewayFactory; import com.appspot.bitlyminous.gateway.GoogleStaticMapsGateway; import com.appspot.bitlyminous.gateway.MapMarker; /** * The Class NearByHandler. */ public class NearByHandler extends AbstractTwitterHandler { /** * Instantiates a new near by handler. * * @param commandName the command name * @param context the context */ public NearByHandler(String commandName, TwitterContext context) { super(commandName, context); } /** The Constant GATEWAY_FACTORY. */ private static final GatewayFactory GATEWAY_FACTORY = GatewayFactory.newInstance(); /* (non-Javadoc) * @see com.appspot.bitlyminous.handler.twitter.TwitterHandler#execute(twitter4j.Status) */ @Override public StatusUpdate execute(Status tweet) { GeoLocation geoLocation = tweet.getGeoLocation(); String text = getMentionText(tweet); if (geoLocation == null) { StatusUpdate reply = new StatusUpdate( ApplicationResources.getLocalizedString("com.appspot.bitlyminous.message.noLocation", new String[] { "@" + tweet.getUser().getScreenName() })); reply.setInReplyToStatusId(tweet.getId()); return reply; } else { try { GeoQuery query = new GeoQuery(geoLocation); List<Tip> nearbyTips = getFoursquareGateway() .getNearbyTips(new com.appspot.bitlyminous.entity.GeoLocation(geoLocation.getLatitude(), geoLocation.getLongitude()), 1); String status = buildTipsStatus(nearbyTips); if (nearbyTips.isEmpty()) { List<Venue> nearbyVenues = new ArrayList<Venue>(); if (text != null) { nearbyVenues = getFoursquareGateway().getNearbyVenues( new com.appspot.bitlyminous.entity.GeoLocation(geoLocation.getLatitude(), geoLocation.getLongitude()), text, 1); } status = status + buildVenuesStatus(nearbyVenues); if (nearbyVenues.isEmpty()) { List<Place> nearbyPlaces = getTwitterClient().getNearbyPlaces(query); status = status + buildPlacesStatus(nearbyPlaces); } } status = "@" + tweet.getUser().getScreenName() + " " + status; StatusUpdate reply = new StatusUpdate(status); reply.setInReplyToStatusId(tweet.getId()); return reply; } catch (Exception e) { logger.log(Level.SEVERE, "Error while getting nearby places", e); } return null; } } /** * Builds the tips status. * * @param nearbyTips the nearby tips * * @return the string */ private String buildTipsStatus(List<Tip> nearbyTips) { StringBuilder builder = new StringBuilder(); GoogleStaticMapsGateway googleStaticMapsGateway = getGoogleStaticMapsGateway(); for (Tip tip : nearbyTips) { builder.append(trimText(tip.getText(), 100)); builder.append("..."); builder.append(shortenUrl(googleStaticMapsGateway.getMap(tip.getVenue().getGeolat(), tip.getVenue().getGeolong(), new MapMarker(tip.getVenue().getGeolat(), tip.getVenue().getGeolong(), MapMarker.MarkerColor.blue, 'a')))); builder.append("."); break; } return builder.toString(); } /** * Builds the venues status. * * @param nearbyVenues the nearby venues * * @return the string */ private String buildVenuesStatus(List<Venue> nearbyVenues) { StringBuilder builder = new StringBuilder(); GoogleStaticMapsGateway googleStaticMapsGateway = getGoogleStaticMapsGateway(); for (Venue venue : nearbyVenues) { builder.append(venue.getName()); builder.append(" "); builder.append(venue.getAddress()); builder.append("."); builder.append(shortenUrl(googleStaticMapsGateway.getMap(venue.getGeolat(), venue.getGeolong(), new MapMarker(venue.getGeolat(), venue.getGeolong(), MapMarker.MarkerColor.blue, 'a')))); builder.append("."); break; } return builder.toString(); } /** * Builds the places status. * * @param nearbyPlaces the nearby places * * @return the string */ private String buildPlacesStatus(List<Place> nearbyPlaces) { StringBuilder builder = new StringBuilder(); // GoogleStaticMapsGateway googleStaticMapsGateway = getGoogleStaticMapsGateway(); for (Place place : nearbyPlaces) { builder.append(place.getFullName()); builder.append(" "); builder.append(place.getStreetAddress()); builder.append("."); // TODO-Later. Fix the bounding box problem. // builder.append(shortenUrl(googleStaticMapsGateway.getMap(place.getGeolat(), place.getGeolong()))); builder.append("."); break; } return builder.toString(); } /** * Gets the foursquare gateway. * * @return the foursquare gateway */ protected FoursquareGateway getFoursquareGateway() { return GATEWAY_FACTORY.createFoursquareGateway(ApplicationConstants.FOURSQUARE_CONSUMER_KEY, ApplicationConstants.FOURSQUARE_CONSUMER_SECRET, ApplicationConstants.FOURSQUARE_ACCESS_TOKEN, ApplicationConstants.FOURSQUARE_ACCESS_TOKEN_SECRET); } /** * Gets the twitter client. * * @return the twitter client */ protected Twitter getTwitterClient() { return new TwitterFactory().getInstance(new OAuthAuthorization(new ConfigurationBuilder().build(), ApplicationConstants.TWITTER_CONSUMER_KEY, ApplicationConstants.TWITTER_CONSUMER_SECRET, new AccessToken(ApplicationConstants.TWITTER_ACCESS_TOKEN, ApplicationConstants.TWITTER_ACCESS_TOKEN_SECRET))); } /** * Gets the google static maps gateway. * * @return the google static maps gateway */ protected GoogleStaticMapsGateway getGoogleStaticMapsGateway() { return new GoogleStaticMapsGateway(ApplicationConstants.GOOGLE_API_KEY); } }