fkn googl

/**
 *
 */
package ddoa.project.luminis.dashboard.paginas.calendar;

import java.io.IOException;
import java.util.LinkedList;
import java.util.List;
import java.util.TimeZone;

import org.joda.time.DateMidnight;

import com.google.api.client.auth.oauth2.Credential;
import com.google.api.client.auth.oauth2.CredentialStore;
import com.google.api.client.auth.oauth2.MemoryCredentialStore;
import com.google.api.client.googleapis.auth.oauth2.GoogleCredential;
import com.google.api.client.http.HttpTransport;
import com.google.api.client.http.javanet.NetHttpTransport;
import com.google.api.client.json.JsonFactory;
import com.google.api.client.json.jackson2.JacksonFactory;
import com.google.api.client.util.DateTime;
import com.google.api.services.calendar.Calendar;
import com.google.api.services.calendar.model.Event;

import ddoa.project.luminis.dashboard.config.exceptions.CalendarException;

/**
 * File description<br/>
 * <br/>
 * Project LuminisDashboardWebapp<br/>
 * ddoa.project.luminis.dashboard.paginas.calendar.CalendarAPI.java<br/>
 * Created on May 29, 2014 2:26:26 PM
 *
 * @author Brord van Wierst
 */
public class CalendarAPI {
    /** Global instance of the HTTP transport. */
    private static final HttpTransport HTTP_TRANSPORT = new NetHttpTransport();

    /** Global instance of the JSON factory. */
    private static final JsonFactory JSON_FACTORY = new JacksonFactory();

    /** Global instance of the credential storage */
    private static final CredentialStore credentialStore = new MemoryCredentialStore();

    String emailId;
    String clientId;
    String clientSecret;

    /**
     *
     * @param emailId
     * @param clientId
     * @param clientSecret
     */
    public CalendarAPI(String emailId, String clientId, String clientSecret) {
        this.emailId = emailId;
        this.clientId = clientId;
        this.clientSecret = clientSecret;
    }

    public Credential getCredential() {
        try {
            Credential credential = new GoogleCredential.Builder()
                    .setTransport(HTTP_TRANSPORT)
                    .setClientSecrets(clientId, clientSecret)
                    .setJsonFactory(JSON_FACTORY).build();
            credentialStore.store(emailId, credential);
            if (credential != null && credentialStore.load(emailId, credential)) {
                return credential;
            } else {
                return null;
            }
        } catch (IOException e) {
            throw new CalendarException("Could not load credential", e);
        }
    }

    public List<Event> getEvents() throws CalendarException {
        Credential credential = getCredential();
        if (credential != null) {
            Calendar cal = new Calendar.Builder(
                    HTTP_TRANSPORT,
                    JSON_FACTORY,
                    credential)
            .setApplicationName("Luminis").build();

            try {
                List<Event> googleEvents = cal
                        .events()
                        .list(emailId)
                        .setSingleEvents(true)
                        .setOrderBy("startTime")
                        .setTimeMin(
                                new DateTime(new DateMidnight().toDate(),
                                        TimeZone.getDefault()))
                        .setTimeMax(
                                new DateTime(new DateMidnight().toDateTime()
                                        .plusDays(1).minusMillis(1).toDate(),
                                        TimeZone.getDefault())).execute()
                        .getItems();

                // Google returns null when there are not results
                if (googleEvents != null) {
                    return googleEvents;
                } else {
                    return new LinkedList<Event>();
                }
            } catch (IOException ioe) {
                throw new CalendarException(
                        "An error occurred when retrieving events", ioe);
            }
        } else {
            return null;
        }
    }
}