de.exxeta.vortraege.mvc.controller.HomeController.java Source code

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Here is the source code for de.exxeta.vortraege.mvc.controller.HomeController.java

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/*
 * Copyright 2002-2010 the original author or authors
 *
 *     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 de.exxeta.vortraege.mvc.controller;

import java.util.Collection;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;

import de.exxeta.vortraege.model.TwitterMessage;
import de.exxeta.vortraege.service.ProcessService;
import de.exxeta.vortraege.service.TwitterService;

/**
 * Handles requests for the application home page.
 */
@Controller
public class HomeController {

    private static final Logger LOG = LoggerFactory.getLogger(HomeController.class);

    @Autowired
    private TwitterService twitterService;

    @Autowired
    private ProcessService processService;

    /**
     * Simply selects the home view to render by returning its name.
     */
    @RequestMapping(value = "/")
    public String home(Model model, @RequestParam(required = false) String startTwitter,
            @RequestParam(required = false) String stopTwitter, @RequestParam(required = false) String retweet,
            @RequestParam(required = false) String tweetId) {

        if (startTwitter != null) {
            twitterService.startTwitterAdapter();
            return "redirect:/";
        }

        if (stopTwitter != null) {
            twitterService.stopTwitterAdapter();
            return "redirect:/";
        }

        Collection<TwitterMessage> twitterMessages = twitterService.getTwitterMessages();

        LOG.info("Retrieved {} Twitter messages.", twitterMessages.size());

        model.addAttribute("twitterMessages", twitterMessages);

        if (retweet != null && tweetId != null) {
            TwitterMessage message = getTwitterMessage(twitterMessages, Long.valueOf(tweetId));
            if (null != message) {
                // Start process
                LOG.info("Start twitter process for tweet id {}.", tweetId);
                processService.start(message);

                // Remove message from collection
                twitterMessages.remove(message);
                model.addAttribute("twitterMessages", twitterMessages);
            } else {
                LOG.error("No tweet found for id {}.", tweetId);
            }
            return "redirect:/";
        }

        return "home";
    }

    /**
     * Simply selects the home view to render by returning its name.
     */
    @RequestMapping(value = "/ajax")
    public String ajaxCall(Model model) {

        final Collection<TwitterMessage> twitterMessages = twitterService.getTwitterMessages();

        LOG.info("Retrieved {} Twitter messages.", twitterMessages.size());
        model.addAttribute("twitterMessages", twitterMessages);

        return "twitterMessages";

    }

    private TwitterMessage getTwitterMessage(Collection<TwitterMessage> twitterMessages, long id) {
        for (TwitterMessage twitterMessage : twitterMessages) {
            if (id == twitterMessage.getId()) {
                return twitterMessage;
            }
        }
        return null;
    }
}