serveFacebookAppTab.java

dependencies.yml

# Application dependencies

require:
    - play 1.2.4
    - play -> fbgraph 0.4

serveFacebookAppTab.java

public static void tabAddCallback(Map<Long,Long> tabs_added) {
    	Set<Long> mySet = tabs_added.keySet();
    	
    	if( mySet.size() != 1){
    		renderText("Sorry, you have to select exactly 1 page. In case you selected more than one you must manually remove the tabs them at each page, on facebook. If you selected none, please, try again.");
    		return;
    	}
    	
    	Long pageId = mySet.iterator().next();
    	
    	// only go though with it, in case the user has secret and is loggedin
    	if( pageId != null ){
    		//TODO persist the  with the page_id
    		session.current().put("pageId", String.valueOf(pageId) );
    		renderText("All working accordly, should add page_id to my user's business");
    	} else {
    		renderText("Denied, something made no sense");
    	}
    }

/*
     * POST
     * Takes param from Facebook
		{
		"algorithm":"HMAC-SHA256",
		"expires":1338487200,
		"issued_at":1338482438,
		"oauth_token":"AAACNFcQjZCpQBACcNz6U2Xh5CENCfTtJJVxwMEuZBOvR1oeGbTzZBMPIi0kRndNlIobFqNjdlFUVX60HpGvjlIiYyQ752Kj80gi6UCNgQZDZD",
		"page":{
		 "id":"378035128900280",
		 "liked":true,
		 "admin":true},
		"user":{
		 "country":"ca",
		 "locale":"en_US",
		 "age":{"min":21}
		},
		"user_id":"683803412"
		}
     */
    public static void tab(String signed_request) {
    	
    	if( signed_request == null || signed_request.length() < 10){
    		renderText("no request data");
    		return ;
    	}
    	
    	SignedRequest sr = new SignedRequest(signed_request);//sigSample);
    	if( sr.verify( Play.configuration.getProperty("fbg.appSecret") ) ){
    		p("Verified request!");
    	} else {
    		renderText("Failed to verify request");
    		return ;
    	}
    	JsonObject reqData = sr.getData();
    	
    	// shows as JSON:renderText( reqData.getAsJsonObject() );
    	
    	JsonObject pageData = reqData.get("page").getAsJsonObject();
    	
    	renderText( pageData.get("id").getAsString() );
    }