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

Introduction

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

Source

/*
 * 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.Properties;

import org.jamppa.component.PacketSender;

import com.buddycloud.friendfinder.HashUtils;
import com.buddycloud.friendfinder.HttpUtils;
import com.google.gson.JsonArray;
import com.google.gson.JsonElement;
import com.google.gson.JsonObject;

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

    private static final String GRAPH_URL = "https://graph.facebook.com";
    private static final String PROVIDER_NAME = "facebook";

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

    @Override
    public ContactProfile getProfile(String accessToken) throws Exception {

        StringBuilder meURLBuilder = new StringBuilder(GRAPH_URL);
        meURLBuilder.append("/me?fields=id&access_token=").append(accessToken);
        String myId = HttpUtils.consumeJSON(meURLBuilder.toString()).getAsJsonObject().get("id").getAsString();

        ContactProfile contactProfile = new ContactProfile(HashUtils.encodeSHA256(PROVIDER_NAME, myId));

        StringBuilder friendsURLBuilder = new StringBuilder(GRAPH_URL);
        friendsURLBuilder.append("/me/friends?fields=id&access_token=").append(accessToken);

        while (true) {
            JsonObject friendsJson = HttpUtils.consumeJSON(friendsURLBuilder.toString()).getAsJsonObject();

            JsonArray friendsArray = friendsJson.get("data").getAsJsonArray();
            for (JsonElement friendJson : friendsArray) {
                JsonObject friendObject = friendJson.getAsJsonObject();
                String friendId = friendObject.get("id").getAsString();
                contactProfile.addFriendHash(HashUtils.encodeSHA256(PROVIDER_NAME, friendId));
            }
            JsonObject paging = friendsJson.get("paging").getAsJsonObject();
            if (!paging.has("next")) {
                break;
            }
            friendsURLBuilder = new StringBuilder(paging.get("next").getAsString());
        }

        return contactProfile;
    }
}