Home.java

package com.rau.evoting.beans;

import java.util.ArrayList;
import java.util.List;
import java.util.Map;

import javax.faces.context.FacesContext;
import javax.servlet.http.HttpServletRequest;

import com.rau.evoting.data.UserDP;
import com.rau.evoting.data.UserGroupDP;
import com.rau.evoting.models.UserGroup;
import com.rau.evoting.utils.FacebookService;
import com.restfb.Connection;
import com.restfb.DefaultFacebookClient;
import com.restfb.FacebookClient;
import com.restfb.types.Group;
import com.restfb.types.User;

/**
 * @author Aram
 * 
 */
public class Home {

	public Home() {
	}

	public void getAccessToken() {
		System.out.println("home init");
		if (!FacesContext.getCurrentInstance().getExternalContext()
				.getSessionMap().containsKey("accessToken")) {
			HttpServletRequest req = (HttpServletRequest) FacesContext
					.getCurrentInstance().getExternalContext().getRequest();
			String code = req.getParameter("code");
			String accessToken = FacebookService.getInstance().getAccessToken(
					code, "Home.xhtml");
			FacebookClient fbClient = new DefaultFacebookClient(accessToken);
			User user = fbClient.fetchObject("me", User.class); 
			int userId = UserDP.insert(user.getId(), user.getEmail());
			Map<String, Object> sessionMap = FacesContext.getCurrentInstance()
					.getExternalContext().getSessionMap();
			sessionMap.put("accessToken", accessToken);
			Connection<Group> gr = fbClient.fetchConnection("me/groups",
					Group.class);
			List<Group> groups = gr.getData();
			List<UserGroup> userGroups = new ArrayList<UserGroup>();
			for(Group g: groups) {
				userGroups.add(new UserGroup(g.getId(),userId,g.getName()));
			}
			sessionMap.put("userGroups", userGroups);
			UserGroupDP.insert(userId, userGroups);
			sessionMap.put("userId", userId);
			sessionMap.put("username", user.getName());
		}
		return;
	}

	public String getUsername() {
		String username = (String) FacesContext.getCurrentInstance()
				.getExternalContext().getSessionMap().get("username");
		return username;
	}

}