ConnectPlugin.java

package com.phonegap.facebook;

import java.io.IOException;
import java.net.MalformedURLException;

import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

import android.app.Activity;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.preference.PreferenceManager;
import android.util.Log;

import com.facebook.android.DialogError;
import com.facebook.android.Facebook;
import com.facebook.android.Facebook.DialogListener;
import com.facebook.android.FacebookError;
import com.phonegap.DroidGap;
import com.phonegap.api.Plugin;
import com.phonegap.api.PluginResult;

public class ConnectPlugin extends Plugin {

    Facebook facebook;
    String userId;
    
    //used for dialog auth
    public String[] permissions = new String[] {};
    public String callbackId;

	@Override
	public PluginResult execute(String action, JSONArray args, final String callbackId) {
		PluginResult pr = new PluginResult(PluginResult.Status.NO_RESULT);
		pr.setKeepCallback(true);
		
		if (action.equals("init")) {
			try {
				facebook = new Facebook(args.getString(0));
				
				Log.d("PhoneGapLog", "reauthorize");
				SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this.ctx);
				String access_token = prefs.getString("access_token", null);
				Long expires = prefs.getLong("access_expires", -1);

				if (access_token != null && expires != -1) {
					this.facebook.setAccessToken(access_token);
					this.facebook.setAccessExpires(expires);
		        	try {
		        		JSONObject o = new JSONObject(this.facebook.request("/me"));
		        		this.userId = o.getString("id");
					} catch (MalformedURLException e) {
						// TODO Auto-generated catch block
						e.printStackTrace();
					} catch (IOException e) {
						// TODO Auto-generated catch block
						e.printStackTrace();
					} catch (JSONException e) {
						// TODO Auto-generated catch block
						e.printStackTrace();
					}
				}

				if(facebook.isSessionValid() && this.userId != null) {
					return new PluginResult(PluginResult.Status.OK, this.getResponse());					
				}
				else {
					return new PluginResult(PluginResult.Status.NO_RESULT);
				}
			} catch (JSONException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
				return new PluginResult(PluginResult.Status.ERROR, "Invalid JSON args used. expected a string as the first arg.");
			}
		}
		
		else if (action.equals("login")) {
			if (facebook != null) {
				if (facebook.isSessionValid()) {
					Log.d("FB", "Session already valid");
					pr = new PluginResult(PluginResult.Status.OK, getResponse());
				} else {
					final ConnectPlugin me = this;
					String[] permissions = new String[args.length()];
					try {
						for (int i=0; i<args.length(); i++) {
							permissions[i] = args.getString(i);
						}
					} catch (JSONException e1) {
						// TODO Auto-generated catch block
						e1.printStackTrace();
						return new PluginResult(PluginResult.Status.ERROR, "Invalid JSON args used. Expected a string array of permissions.");
					}
		
					this.ctx.setActivityResultCallback(this);
					this.permissions = permissions;
					this.callbackId = callbackId;
					Runnable runnable = new Runnable() {
						public void run() {
							me.facebook.authorize((Activity)me.ctx, me.permissions, new AuthorizeListener(me));
						};
					};
					this.ctx.runOnUiThread(runnable);
				}
			} else {
				pr = new PluginResult(PluginResult.Status.ERROR, "Must call FB.init before FB.login");
			}
		}
		
		else if (action.equals("logout")) {
			if (facebook != null) {
				try {
					facebook.logout(this.ctx);
					
					SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this.ctx);
					prefs.edit().putLong("access_expires", -1).commit();
					prefs.edit().putString("access_token", null).commit();
				} catch (MalformedURLException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
					pr = new PluginResult(PluginResult.Status.MALFORMED_URL_EXCEPTION, "Error logging out.");
				} catch (IOException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
					pr = new PluginResult(PluginResult.Status.IO_EXCEPTION, "Error logging out.");
				}
				pr = new PluginResult(PluginResult.Status.OK, getResponse());
			}
		}
		
		else if (action.equals("getLoginStatus")) {
			if (facebook != null) {
				pr = new PluginResult(PluginResult.Status.OK, getResponse());
			}
		}
		
		return pr;
	}

    public static final String SINGLE_SIGN_ON_DISABLED = "service_disabled";
    
    @Override
    public void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);

        facebook.authorizeCallback(requestCode, resultCode, data);
    }
    
    public JSONObject getResponse() {
    	String response = "{"+
		"    \"status\": \""+(facebook.isSessionValid() ? "connected" : "unknown")+"\","+
		"    \"session\": {"+
		"        \"access_token\": \""+facebook.getAccessToken()+"\","+
		"        \"expires\": \""+facebook.getAccessExpires()+"\","+
		"        \"secret\": \"9e6c510c087d9367cf0f52034acf5954\","+
		"        \"session_key\": true,"+
		"        \"sig\": \"...\","+
		"        \"uid\": \""+this.userId+"\""+
		"    }"+
		"}";
    	
    	try {
			return new JSONObject(response);
		} catch (JSONException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		return new JSONObject();
    }

	class AuthorizeListener implements DialogListener {
		final ConnectPlugin fba;

		public AuthorizeListener(ConnectPlugin fba){
			super();
			this.fba = fba;
		}

		public void onComplete(Bundle values) {
			//  Handle a successful login

			String token = this.fba.facebook.getAccessToken();
			long token_expires = this.fba.facebook.getAccessExpires();
			SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this.fba.ctx);
			prefs.edit().putLong("access_expires", token_expires).commit();
			prefs.edit().putString("access_token", token).commit();

        	Log.d("FB", "authorized");
			Log.d("PhoneGapLog", values.toString());
			
        	try {
        		JSONObject o = new JSONObject(this.fba.facebook.request("/me"));
        		this.fba.userId = o.getString("id");
        		this.fba.success(getResponse(), this.fba.callbackId);
			} catch (MalformedURLException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			} catch (IOException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			} catch (JSONException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
		}

		public void onFacebookError(FacebookError e) {
			Log.d("FB", "facebook error");
        	this.fba.error("Facebook error: " + e.getMessage(), callbackId);

		}

		public void onError(DialogError e) {
        	Log.d("FB", "other error");
        	this.fba.error("Dialog error: " + e.getMessage(), this.fba.callbackId);
		}

		public void onCancel() {
        	Log.d("FB", "cancel");
        	this.fba.error("Cancelled", this.fba.callbackId);
		}
	}
}