de.steveliedtke.calendar.domain.impl.EventServiceImpl.java Source code

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Here is the source code for de.steveliedtke.calendar.domain.impl.EventServiceImpl.java

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/*
 * CalDataProvider - This program provides google calendar data and visualizes them
 * 
 * Copyright (C) 2012 Steve Liedtke <sliedtke57@gmail.com>
 * 
 * This program is free software; you can redistribute it and/or modify it under the terms of the 
 * GNU General Public License as published by the Free Software Foundation; either version 3 of 
 * the License, or (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; 
 * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See 
 * the GNU General Public License for more details.
 * 
 * You can find a copy of the GNU General Public License on http://www.gnu.org/licenses/gpl.html.
 * 
 * Contributors:
 *     Steve Liedtke <sliedtke57@gmail.com>
 */
package de.steveliedtke.calendar.domain.impl;

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.logging.Logger;

import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

import de.steveliedtke.calendar.data.api.CalendarInfoDAO;
import de.steveliedtke.calendar.domain.api.EventService;

/**
 * @author Steve Liedtke
 */
public final class EventServiceImpl implements EventService {

    /**
     * static attribute used for logging.
     */
    private static final Logger logger = Logger.getLogger(EventServiceImpl.class.getName());

    private final CalendarInfoDAO calDAO;

    public EventServiceImpl(final CalendarInfoDAO calDAO) {
        this.calDAO = calDAO;
    }

    /* (non-Javadoc)
     * @see de.liedtke.business.api.CloseService#close()
     */
    @Override
    public void close() {
        this.calDAO.close();
    }

    /* (non-Javadoc)
     * @see de.steveliedtke.calendar.domain.api.UpdateDataService#getNextEvents(java.lang.String, int)
     */
    @Override
    public JSONArray getNextEvents(final String basicUrl, final int amount) {
        final String parameters = "full?ctz=Europe/Berlin&futureevents=true&orderby=starttime" + "&max-results="
                + amount + "&singleevents=true&sortorder=a&alt=json&fields=entry(title,gd:when,content,gd:where)";

        final JSONArray result = new JSONArray();

        try {
            final JSONObject feedResult = new JSONObject(this.fetchCalendarUrl(basicUrl + parameters));
            final JSONObject feed = feedResult.getJSONObject("feed");
            final JSONArray entries = feed.getJSONArray("entry");
            for (int i = 0; i < entries.length(); i++) {
                final JSONObject entry = entries.getJSONObject(i);
                final String title = entry.getJSONObject("title").getString("$t");
                final String content = entry.getJSONObject("content").getString("$t");
                final String starttime = entry.getJSONArray("gd$when").getJSONObject(0).getString("startTime");
                final String endtime = entry.getJSONArray("gd$when").getJSONObject(0).getString("endTime");
                final String where = entry.getJSONArray("gd$where").getJSONObject(0).getString("valueString");
                final JSONObject resultEntry = new JSONObject();
                resultEntry.put("title", title);
                resultEntry.put("content", content);
                resultEntry.put("starttime", starttime);
                resultEntry.put("endtime", endtime);
                resultEntry.put("where", where);
                result.put(resultEntry);
            }
        } catch (JSONException e) {
            logger.warning("JSONException: " + e.getMessage());
        }

        return result;
    }

    private String fetchCalendarUrl(String urlToRead) {
        URL url;
        HttpURLConnection conn;
        BufferedReader rd;
        String line;
        String result = "";
        try {
            url = new URL(urlToRead);
            conn = (HttpURLConnection) url.openConnection();
            conn.setRequestMethod("GET");
            conn.setConnectTimeout(60000);
            rd = new BufferedReader(new InputStreamReader(conn.getInputStream()));
            while ((line = rd.readLine()) != null) {
                result += line;
            }
            rd.close();
        } catch (Exception e) {
            logger.warning(e.getMessage());
        }
        return result;
    }

    /* (non-Javadoc)
     * @see de.steveliedtke.calendar.domain.api.UpdateDataService#updateCache(java.lang.String)
     */
    @Override
    public void updateCache(String basicUrl) {
        // TODO Auto-generated method stub

    }
}