com.buddycloud.friendfinder.provider.Gmail.java Source code

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Here is the source code for com.buddycloud.friendfinder.provider.Gmail.java

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/*
 * Copyright 2011 buddycloud
 *
 * 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.buddycloud.friendfinder.provider;

import java.util.Iterator;
import java.util.Properties;

import org.dom4j.Element;
import org.jamppa.component.PacketSender;

import com.buddycloud.friendfinder.HashUtils;
import com.buddycloud.friendfinder.HttpUtils;

/**
 * @author Abmar
 *
 */
public class Gmail extends AbstractContactProvider implements OAuth2ContactProvider {

    private static final String GOOGLE_FEED = "https://www.google.com/m8/feeds/contacts/default/full";
    private static final String PROVIDER_NAME = "email";
    private static final int PAGE_SIZE = 50;

    /**
     * @param properties
     * @param packetSender
     */
    public Gmail(Properties properties, PacketSender packetSender) {
        super(properties, packetSender);
    }

    @SuppressWarnings("unchecked")
    @Override
    public ContactProfile getProfile(String accessToken) throws Exception {
        boolean firstPage = true;
        ContactProfile contactProfile = null;
        int startIndex = 1;

        String myEmail = null;

        while (true) {
            StringBuilder urlBuilder = new StringBuilder(GOOGLE_FEED);
            urlBuilder.append("?start-index=").append(startIndex);
            urlBuilder.append("&max-results=").append(PAGE_SIZE);
            urlBuilder.append("&access_token=").append(accessToken);

            String contactsURL = urlBuilder.toString();
            Element xmlContacts = HttpUtils.consumeXML(contactsURL);

            if (firstPage) {
                myEmail = xmlContacts.element("id").getText();
                contactProfile = new ContactProfile(HashUtils.encodeSHA256(PROVIDER_NAME, myEmail));
            }

            if (xmlContacts.element("entry") == null) {
                break;
            }
            Iterator<Element> friendsElements = xmlContacts.elementIterator("entry");
            while (friendsElements.hasNext()) {
                Element element = (Element) friendsElements.next();
                Element emailEl = element.element("email");
                if (emailEl == null) {
                    continue;
                }
                String friendEmail = emailEl.attributeValue("address");
                if (friendEmail.equals(myEmail)) {
                    continue;
                }
                contactProfile.addFriendHash(HashUtils.encodeSHA256(PROVIDER_NAME, friendEmail));
            }

            startIndex += PAGE_SIZE;
            firstPage = false;
        }

        return contactProfile;
    }
}