1. Social Apps with the Force.com
Toolkit for Facebook
Pat Patterson, salesforce.com, Principal Developer Evangelist
@metadaddy

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3. Pat Patterson
Principal Developer Evangelist
@metadaddy

4. 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

5. 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

6. The Facebook Graph API
https://developers.facebook.com/docs/reference/api/

7. 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

8. 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

9. 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

10. 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

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

12. 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"}

13. Graph API Explorer
https://developers.facebook.com/tools/explorer

14. 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);
}

15. 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

16. 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!

17. 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/',
});

18. 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?

19. 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”>

20. 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…

21. 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});

22. 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

23. Go out and build something cool!

24. Pat Patterson
Principal Developer Evangelist,
@metadaddy