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

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Here is the source code for com.appspot.bitlyminous.handler.twitter.SubscribeHandler.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 java.util.List;
import java.util.logging.Level;

import twitter4j.Status;
import twitter4j.StatusUpdate;

import com.appspot.bitlyminous.entity.Tag;
import com.appspot.bitlyminous.entity.Tags;
import com.appspot.bitlyminous.entity.User;

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

    /**
     * Instantiates a new subscribe handler.
     * 
     * @param commandName the command name
     * @param context the context
     */
    public SubscribeHandler(String commandName, TwitterContext context) {
        super(commandName, context);
    }

    /* (non-Javadoc)
     * @see com.appspot.bitlyminous.handler.twitter.TwitterHandler#execute(twitter4j.Status)
     */
    @Override
    public StatusUpdate execute(Status tweet) {
        try {
            User user = context.getUser();
            if (user == null) {
                user = getUserByScreenName(tweet.getUser().getScreenName());
                context.setUser(user);
            }
            if (user != null) {
                if (user.getTags() == null) {
                    user.setTags(new Tags());
                }

                List<Tag> tags = user.getTags().getTag();
                String[] mentionTags = getMentionText(tweet).split("\\s+");
                for (String tag : mentionTags) {
                    if (!isExisting(tags, tag)) {
                        Tag obj = new Tag();
                        obj.setTag(tag);
                        obj.setCount(5L);
                        tags.add(obj);
                    }
                }
                user.setTags(user.getTags());
            }
        } catch (Exception e) {
            logger.log(Level.SEVERE, "Error while subscribing tags.", e);
        }
        return null;
    }

    /**
     * Checks if is existing.
     * 
     * @param tags the tags
     * @param newTag the new tag
     * 
     * @return true, if is existing
     */
    protected boolean isExisting(List<Tag> tags, String newTag) {
        for (Tag tag : tags) {
            if (tag.getTag().equals(newTag)) {
                return true;
            }
        }
        return false;
    }
}