Collects OpenGraph tag data from markup into an object list.

jquery.opengraph.js

/*
* Author: Josue Rodriguez <josue@josuerodriguez.com>
* Created: 2011-06-30
* License: MIT
* Description: Collects OpenGraph tag data from markup into an object list.
*/

var OpenGraph = function(opts){
    var opt = opts || {};
    var context = opt.DOM || typeof opts==="string" && opts || document;
    var types = opt.types || "album|book|drink|food|game|movie|product|song|tv_show|article|blog|website";
    var A = {};
    var $ = window.jQuery || null;
    
    A.parse = function(context){
    	if(!$) { return this; }
    	
        A.list = {};
        var metas = $("meta[property^='og:']",context);
        var og_type = metas.filter("[property='og:type']").attr("content");
        var regexp_types = new RegExp(types.toString(),"gim");
        if(regexp_types.test(og_type)) {
            metas.each(function(i,e){
                var k = $(e).attr("property").replace("og:","");
                A.list[k] = $(e).attr("content");
            });
        }
        
        return this;
    };
    
    A.parse(context);
    
    return A;
};

// ===== USAGE =====

$(function(){
	var Product = {};
	
	// checks OpenGraph support and collects data if type is found (ie: movie, product, etc):
	var OG = (new OpenGraph).list;
	
	if(OG.type) {
		Product.title = OG.title
		Product.image = OG.image;
	}
	
	// collect only specific type tag data (ie: game)
	var Game = ( new OpenGraph({ types: "game" }) ).list;
	
	//.... etc....
});