How to get friends likes via Facebook API

Question

Is this possible to get all my friends likes?? Now, I'm getting this by 2 steps:

1. Getting all my friends list
2. By iterating those list I'm getting all individuals Likes,

but it seems very big process, anybody have idea to improve the performance for this task?

Answer 1

At last I found it after 2 weeks looking at Facebook API documentation

FB.api("/likes?ids=533856945,841978743")

FB.api("me/friends",{
  fields:'id',
  limit:10
},function(res){
  var l=''
  $.each(res.data,function(idx,val){
     l=l+val.id+(idx<res.data.length-1?',':'')
  })
  FB.api("likes?ids="+l,function(res){
      console.log(res);
  })
})

Answer 2

Using FQL is going to be faster than looping through the Graph API results. You can get the ID of the pages your friends like, but unfortunately FQL does not return info other than that (ie the name). Take a look at the following.

This assumes you are using the PHP SDK with the friends_likes permission.

// hold on to your user ID
$user_id = $facebook->getUser();

// query your friend's likes based on their ID
$query = "SELECT uid, page_id FROM page_fan WHERE uid IN (SELECT uid2 FROM friend WHERE uid1 = $user_id)";
$result = $fb->api(array(
  'method' => 'fql.query',
  'query' => $query,
));

// optionally group the results by each friend ID
function arraySort($input, $sortkey){
  foreach ($input as $key => $val) {
    $output[ $val [ $sortkey ] ][] = $val;
  }
  return $output;
}
$friendLikes = arraySort($result,'uid');

// output the results
echo sprintf('<pre>%s</pre>', print_r($friendLikes,TRUE));

The benefit of this is that you only make one API call. You will have to make separate calls to get the friend names and another for the liked page details, but you have the IDs to work with now in a straight forward approach.