org.nuxeo.google.calendar.Publisher.java Source code

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Here is the source code for org.nuxeo.google.calendar.Publisher.java

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/*
 * (C) Copyright 2016 Nuxeo SA (http://nuxeo.com/) and others.
 *
 * 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.
 *
 * Contributors:
 *     Michael Gena
 */
/**
 * 
 */

package org.nuxeo.google.calendar;

import java.io.IOException;
import java.security.GeneralSecurityException;
import java.text.SimpleDateFormat;
import java.util.Arrays;
import java.util.GregorianCalendar;

import org.nuxeo.ecm.automation.OperationContext;
import org.nuxeo.ecm.automation.core.Constants;
import org.nuxeo.ecm.automation.core.annotations.Context;
import org.nuxeo.ecm.automation.core.annotations.Operation;
import org.nuxeo.ecm.automation.core.annotations.OperationMethod;
import org.nuxeo.ecm.automation.core.annotations.Param;
import org.nuxeo.ecm.automation.core.collectors.DocumentModelCollector;
import org.nuxeo.ecm.core.api.NuxeoException;
import org.nuxeo.ecm.core.api.DocumentModel;
import org.nuxeo.ecm.platform.oauth2.providers.OAuth2ServiceProvider;
import org.nuxeo.ecm.platform.oauth2.providers.OAuth2ServiceProviderRegistry;
import org.nuxeo.runtime.api.Framework;

import com.google.api.client.auth.oauth2.Credential;
import com.google.api.client.googleapis.auth.oauth2.GoogleCredential;
import com.google.api.client.googleapis.javanet.GoogleNetHttpTransport;
import com.google.api.client.http.HttpTransport;
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 com.google.api.services.calendar.model.EventAttendee;
import com.google.api.services.calendar.model.EventDateTime;

/**
 * @author Michael Gena
 */
@Operation(id = Publisher.ID, category = Constants.CAT_NOTIFICATION, label = "Publish on Google Calendar", description = "This operation lets you publish an event to a Google Calendar. The <code>userEmailAddress</code> is the e-mail address of the user who authorized an offline access to his calendar.")
public class Publisher {

    public static final String ID = "GoogleCalendarPublisher";

    @Context
    protected OperationContext context;

    @Param(name = "userEmailAddress", required = true)
    String userEmailAddress = "";

    @Param(name = "summary", required = true)
    String summary = "";

    @Param(name = "location", required = false)
    String location = "";

    @Param(name = "description", required = false)
    String description = "";

    @Param(name = "startDate", required = true)
    GregorianCalendar startDate = new GregorianCalendar();

    @Param(name = "endDate", required = true)
    GregorianCalendar endDate = new GregorianCalendar();

    @Param(name = "attendeeEmailAddress", required = false)
    String attendeeEmailAddress = "";

    @OperationMethod(collector = DocumentModelCollector.class)
    public DocumentModel run(DocumentModel input) {
        JsonFactory JSON_FACTORY = JacksonFactory.getDefaultInstance();
        HttpTransport httpTransport;
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
        try {
            httpTransport = GoogleNetHttpTransport.newTrustedTransport();

            //Credential credential = new GoogleCredential().setAccessToken(getAccessToken(userEmailAddress));

            OAuth2ServiceProvider serviceProvider = Framework.getLocalService(OAuth2ServiceProviderRegistry.class)
                    .getProvider("googledrive");
            Credential storedCredential = serviceProvider.loadCredential(userEmailAddress);

            Credential credential = new GoogleCredential.Builder()
                    .setClientSecrets(serviceProvider.getClientId(), serviceProvider.getClientSecret())
                    .setJsonFactory(JSON_FACTORY).setTransport(httpTransport).build()
                    .setRefreshToken(storedCredential.getRefreshToken())
                    .setAccessToken(storedCredential.getAccessToken());

            // Initialize Calendar service with valid OAuth credentials          
            Calendar service = new Calendar.Builder(httpTransport, JSON_FACTORY, credential).build();
            // Create an Event and publish it
            Event event = new Event().setSummary(summary).setLocation(location).setDescription(description);

            DateTime startDateTime = new DateTime(sdf.format(startDate.getTime()));
            EventDateTime start = new EventDateTime().setDate(startDateTime);
            event.setStart(start);

            //weird bug fix
            endDate.add(GregorianCalendar.DAY_OF_MONTH, 1);

            DateTime endDateTime = new DateTime(sdf.format(endDate.getTime()));
            EventDateTime end = new EventDateTime().setDate(endDateTime);
            event.setEnd(end);

            if (attendeeEmailAddress != null && !"".equals(attendeeEmailAddress)) {
                EventAttendee[] attendees = new EventAttendee[] {
                        new EventAttendee().setEmail(attendeeEmailAddress) };
                event.setAttendees(Arrays.asList(attendees));
            }
            String calendarId = "primary";
            event = service.events().insert(calendarId, event).execute();
        } catch (GeneralSecurityException | IOException e) {
            throw new NuxeoException(e);
        }
        return input;
    }

    protected String getAccessToken(String user) {
        OAuth2ServiceProvider serviceProvider = Framework.getLocalService(OAuth2ServiceProviderRegistry.class)
                .getProvider("googledrive");
        Credential credential = serviceProvider.loadCredential(user);
        if (credential != null) {
            String accessToken = credential.getAccessToken();
            if (accessToken != null) {
                return accessToken;
            }
        }
        return null;
    }

}