Social Apps with the Force.com

Toolkit for Facebook

Pat Patterson, salesforce.com, Principal Developer Evangelist

@metadaddy

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Pat Patterson

Principal Developer Evangelist

@metadaddy

Objectives

Understand the Facebook Graph API

Be able to use the Force.com Toolkit for Facebook in an app

Understand how users can use their Facebook identity to login

to Salesforce

Agenda

The Facebook Graph API

The Force.com Toolkit for Facebook

Social Sign-On with Authentication Providers

Create a social application on Force.com

Login from Facebook

Share with friends

Post to timeline

The Facebook Graph API

https://developers.facebook.com/docs/reference/api/

Accessing Social Graph Objects

Every social graph object has a unique ID

https://graph.facebook.com/ID

For example, ‘Facebook Platform’ has ID 19292868552

GET https://graph.facebook.com/19292868552

Relationships – Edges on the Graph

Friends, feed (wall/timeline), likes, photos, videos, etc

Graph API terminology: connections

https://graph.facebook.com/ID/CONNECTION_TYPE

For example, my friends

Special ID - me

GET https://graph.facebook.com/me/friends

Graph API Authorization

OAuth 2.0

Redirect to Facebook; user authenticates (if necessary) and gives

permission for app to access the Graph API

App receives access token representing the user’s permission to

access their social graph

App sends access token with Graph API calls as a query parameter

https://graph.facebook.com/ID?access_token=TOKENVALUE

Graph API Permissions

Access to specific types of graph objects is controlled by

permissions

user_likes, friends_photos, publish_stream etc

Requested via scope parameter in OAuth 2.0 request

Balance app functionality against intrusiveness

Searching

GET https://graph.facebook.com/search?q=force.com&type=post

Publishing

HTTP POST to a connection URL

Access token is required!

curl -F 'access_token=...' \

-F 'message=Hello world!' \

https://graph.facebook.com/me/feed

Response: {"id":"667905711_10151088147280712"}

Graph API Explorer

https://developers.facebook.com/tools/explorer

Force.com Toolkit for Facebook

http://wiki.developerforce.com/page/Facebook_Toolkit

Apex binding for the Facebook Graph API

Map<String,String> params =

new Map<string,string>{'fields' => 'id,name',

'limit' => '10'};

FacebookUsers friends =

new FacebookUsers(access_token, 'me/friends', params);

for (FacebookUser friend : friends.data) {

System.debug(friend.name);

}

Force.com Toolkit for Facebook

Graph API objects modeled as Apex classes

FacebookUser, FacebookPhoto etc

<apex:page controller=“FriendsController”>

<apex:pageSectionTable value=“{!friends}” var=“friend”>

<apex:column value=“{!friend.name}”>

</apex:pageSectionTable>

</apex:page>

Open source, but unsupported

Social Sign-On from Facebook to

Customer Portal

Authentication Provider

Built into Force.com Platform

Performs ‘app’ side of OAuth flow

Maps Facebook user to Customer Portal user via Registration Handler

class

Can also map to org users, but not as useful in the Facebook context!

Leveraging the Social Graph

How do we get our customer portal to ‘go viral’?

Allow users to invite their friends

Super-easy from JavaScript in a Visualforce page with Facebook Dialogs

FB.ui({

method: 'send',

to: '123456789',

name: 'Check out this great site!',

description: 'My Portal has everything you need.’,

link: 'http://myportalurl.force.com/',

});

Building a Social App

Want to (optionally) publish a link to the user’s wall when they

close a case – encourage more friends to come use the portal!

Can we show a checkbox to allow the user to publish to their

wall at the time they close the case, with no Facebook dialog?

Getting an Access Token – Customer Portal

public class MyPageController {

private static String authProviderId = // Get custom setting;

public String getAccessToken(){

Auth.AuthToken.getAccessToken(authProviderId, 'facebook');

}

...

}

<apex:page controller=”MyPageController”

cache="false" sidebar="false" showHeader="false” title=”My Page”>

One Shortcoming with Authentication Provider

scope is fixed to email

email address + ‘basic info’ (friends list etc)

Right now, out of the box, Authentication Providers work great

for Social Sign-On, but don’t allow very rich social apps

Unless…

Widening Scope

Workaround for fixed scope

Use Facebook JavaScript SDK to request additional permissions

// We need some permissions - ask for them

FB.login(function(response) {

if (!response) {

alert('Error getting permission!');

} else {

location.reload(true);

}

}, {scope: reqperms});

Wrapping Up

The Facebook JavaScript SDK and Dialogs allow simple social

actions from Visualforce

The Force.com Toolkit for Facebook gives access to the Graph

API from Apex

Authentication Providers allow Social Sign-On to customer

portals

Go out and build something cool!

Pat Patterson

Principal Developer Evangelist,

@metadaddy