Integrate Facebook Credits with AS3-SDK - actionscript-3

Question

I’m trying to integrate Facebook Credits as a paying method using the as3-sdk. I managed to get “earn_credits” and “buy_credits” working. However the third and most important option, “buy_item”, doesn’t show up the pay dialog. Somehow the connection to the callback.php seems the reason for the issue. Note: I have typed in the callback URL in my apps settings, so I didn’t forget that. I use the example php file from the Facebook Developer docs.
This is my as3 code.
public static function buyItem ():void
{
var theAction:String = "buy_item";
var order_info:Object = { "item_id":"1a" };
var jOrder:String = JSON.encode(order_info);
var data:Object = {
action:theAction,
order_info:jOrder,
dev_purchase_params: {"oscif":true}
};
Facebook.ui("pay", data, purchaseCallback);
}
I think the json encoding might be the problem, but i'm not sure.
I use the example php file from the Facebook Developer docs (excerpt):
<?php
$app_secret = '***********************';
// Validate request is from Facebook and parse contents for use.
$request = parse_signed_request($_POST['signed_request'], $app_secret);
// Get request type.
// Two types:
// 1. payments_get_items.
// 2. payments_status_update.
$request_type = $_POST['method'];
// Setup response.
$response = '';
if ($request_type == 'payments_get_items') {
// Get order info from Pay Dialog's order_info.
// Assumes order_info is a JSON encoded string.
$order_info = json_decode($request['credits']['order_info'], true);
// Get item id.
$item_id = $order_info['item_id'];
// Simulutates item lookup based on Pay Dialog's order_info.
if ($item_id == '1a') {
$item = array(
'title' => '100 some game cash',
'description' => 'Spend cash in some game.',
// Price must be denominated in credits.
'price' => 1,
'image_url' => '**********************/banner1.jpg',
);
// Construct response.
$response = array(
'content' => array(
0 => $item,
),
'method' => $request_type,
);
// Response must be JSON encoded.
$response = json_encode($response);
}
Any help, is really appreciated.

Answer 1

Okay so I cannot confirm that this works but according to this forum, it does:
var title:String = "TITLE FOO";
var desc:String = "FOO";
var price:String = "200";
var img_url:String = [some image url];
var product_url:String = [some product url];
// create order info object
var order_info:Object = {
"title":title,
"description":desc,
"price":price,
"image_url":img_url,
"product_url":product_url
};
// calling the API ...
var obj:Object = {
method: 'pay.prompt',
order_info: order_info,
purchase_type: 'item',
credits_purchase: false
};
Facebook.ui('pay', obj, callbackFunction);
I see that this example differs from yours slightly on the AS3 side so hopefully this nfo will help you resolve your problem. I realize that this isn't the best way to go about answering questions but I can see after a couple of days on here, no one has a answered you so I figured anything could help at this point. :)

Answer 2

Thank you #Ascension Systems!
This worked out well and is much better than creating a pop-up via html, and using navigateToURL etc...
One caveat though, which caused your solution not to work for me initially:
If you are relying on the callback.php sample provided by Facebook ( at the end of this page: http://developers.facebook.com/docs/credits/callback/ ), then you need to add this tag to your order_info object:
var item_id:String = "1a";
var order_info:Object = {
"title":title,
"description":desc,
"price":price,
"image_url":img_url,
"product_url":product_url,
"item_id":item_id
};
Without item_id defined, the if statement in Facebook's callback.php ( if ($item_id == '1a') ... ) will fail, and you'll get an unpleasant window: "App Not Responding
The app you are using is not responding. Please try again later."