com.appspot.bitlyminous.handler.twitter.SearchHandler.java Source code

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Here is the source code for com.appspot.bitlyminous.handler.twitter.SearchHandler.java

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/*
 * 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 twitter4j.Status;
import twitter4j.StatusUpdate;

import com.appspot.bitlyminous.constant.ApplicationConstants;
import com.googleapis.ajax.common.PagedList;
import com.googleapis.ajax.schema.WebResult;
import com.googleapis.ajax.services.GoogleSearchQueryFactory;
import com.googleapis.ajax.services.WebSearchQuery;
import com.rosaloves.bitlyj.Bitly;

/**
 * The Class SearchHandler.
 */
public class SearchHandler extends AbstractTwitterHandler {

    /**
     * Instantiates a new search handler.
     * 
     * @param context the context
     */
    public SearchHandler(TwitterContext context) {
        super(context);
    }

    /* (non-Javadoc)
     * @see com.appspot.bitlyminous.handler.twitter.TwitterHandler#execute(twitter4j.Status)
     */
    @Override
    public StatusUpdate execute(Status tweet) {
        GoogleSearchQueryFactory factory = GoogleSearchQueryFactory
                .newInstance(ApplicationConstants.GOOGLE_API_KEY);
        WebSearchQuery query = factory.newWebSearchQuery();
        query.setReferrer(ApplicationConstants.GOOGLE_API_REFERER);
        PagedList<WebResult> response = query.withQuery(getMentionText(tweet)).list();
        if (response.isEmpty()) {
            return null;
        } else {
            StatusUpdate update = new StatusUpdate(
                    "@" + tweet.getUser().getScreenName() + " " + buildStatus(response.get(0)));
            update.setInReplyToStatusId(tweet.getId());
            return update;
        }
    }

    /**
     * Builds the status.
     * 
     * @param webResult the web result
     * 
     * @return the string
     */
    private String buildStatus(WebResult webResult) {
        StringBuilder builder = new StringBuilder();
        String title = webResult.getTitleNoFormatting();
        title = trimText(title, 100) + " ";
        builder.append(title);
        builder.append(shortenUrl(webResult.getUnescapedUrl()));
        return builder.toString();
    }

    /* (non-Javadoc)
     * @see com.appspot.bitlyminous.handler.twitter.AbstractTwitterHandler#shortenUrl(java.lang.String)
     */
    protected String shortenUrl(String longUrl) {
        return getBitlyClient().call(Bitly.shorten(longUrl)).getShortUrl();
    }
}