CODEWITHSUNDEEP
facebookfacebook-wall
Melissa Kissner
Melissa Kissner

Reputation: 1

Check if user can write on a friend's Wall

If there any way to check in PHP SDK if user can write on specific friend's Wall?

Example:

if ($facebook_can_write_to->'123456789') echo "You can write on this friend's Wall";

Upvotes: 0

Views: 370

Answers (2)

DMCS
DMCS

Reputation: 31870

Using the FQL table (http://developers.facebook.com/docs/reference/fql/user/) you can check to see if the current user can post to a friends wall by loading up the friend's user information specifically the can_post field.

can_post bool Whether or not the viewer can post to the user's Wall.

Upvotes: 1

Nitzan Tomer
Nitzan Tomer

Reputation: 164287

According to the documentation you can post on a user friends wall if that user granted you the *publish_stream* permission:

publish_stream

Enables your app to post content, comments, and likes to a user's stream and to the streams of the user's friends.

There are some cases in which you won't be able to do so, for example if some user blocked your application then I guess it will fail if you try, so you should just check the response you get back from facebook for the api request and see if it worked or not.

Edit

As far as I'm aware you can not ask the api (nor via fql) "can my application post to this users wall", you can only ask "have this user granted my application the publish_stream permission".

If I understand what you want, I might have kind of a solution for you though. I say show the user the option to post on a friends wall. When the user chooses this option try to post on the friends wall (and I assume you are using ajax for that call), if it fails return some kind of code, then in the client side check for that code, if it returns use the javascript sdk to open a dialog.

You have two choices for dialogs, you can use the Feed Dialog like this:

var obj = {
    method: 'feed',
    to: "FRIEND_ID",
    name: 'A message',
    caption: 'Just trying something',
    description: 'This is how to post on a friends wall'
};

FB.ui(obj, function(response) { console.log(response); });

Or you can use the Send Dialog:

FB.ui({
    method: 'send',
    to: "FRIEND_ID",
    name: 'A message',
    link: 'LINK_URL',
});

With this one though you have to post a link, I'm not sure if that works for you. After you tried and failed for a user you can save that data and use it later.

Upvotes: 0

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