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Disarm Adblock Detectors

Few utils which help to bypass Adblock detectors

As of 13. 01. 2015. See the latest version.

This script should not be not be installed directly. It is a library for other scripts to include with the meta directive // @require https://update.greatest.deepsurf.us/scripts/7465/31790/Disarm%20Adblock%20Detectors.js 

/*jslint browser: true, devel: true */
/*global unsafeWindow, exportFunction */

var DAD = (function (window, unsafeWindow) {
    "use strict";
    
    var utils, debug,
        slice = Array.prototype.slice;
    
    function noop() {
    }
    
    function injectCSS(css) {
        var style,
            head = document.getElementsByTagName("head")[0];
        
        if (head) {
            style = document.createElement("style");
                
            style.textContent = css;
            style.type = "text/css";
                
            head.appendChild(style);
        }
    }
    
    function wrapValue(value, writable) {
        var wrapper;
        
        writable = !!writable;
        
        if (value instanceof Function) {
            wrapper = exportFunction(value, unsafeWindow);
        } else if (value instanceof Array) {
            wrapper = exportProperties(new unsafeWindow.Array(), value, writable);
        } else if (value instanceof Object) {
            wrapper = exportProperties(new unsafeWindow.Object(), value, writable);
        }
        
        return wrapper || value;
    }
    
    function wrapArgs(args) {
        var index, value;
        
        args =  wrapValue(args, true);
        
        for (index = args.length - 1; index >= 0; --index) {
            value = args[index];
            
            if (typeof value === "function" && !value.isProxy) {
                createProxy(args, index, true);
            }
        }
        
        return args;
    }
    
    function exportProperty(target, name, value, writable) {
        writable = !!writable;
        
        if (debug) {
            console.log("export property " + name);
        }
        
        var descriptor = {
            configurable: false,
            enumerable: true,
            value: wrapValue(value, writable),
            writable: writable
        };
        
        try {
            Object.defineProperty(target, name, descriptor);
        } catch (exception) {
            console.error(exception);
        }
        
        return target[name];
    }
    
    function exportProperties(target, object, writable) {
        writable = !!writable;
        
        var index, key;
        
        if (object instanceof Array) {
            for (index = object.length - 1; index >= 0; --index) {
                exportProperty(target, index, object[index], writable);
            }
        } else if (object instanceof Object) {
            for (key in object) {
                if (object.hasOwnProperty(key)) {
                    exportProperty(target, key, object[key], writable);
                }
            }
        }
        
        return target;
    }
    
    function createProxy(target, name, fn, writable) {
        if (debug) {
            console.log("createProxy", arguments);
        }
        
        var caller, handler, proxy,
            native = target[name];

        if (native.isProxy) {
            console.warn("method " + name + " of", target, "is already a proxy");
        } else {
            caller = function (args) {
                return native.apply(target, wrapArgs(args));
            };
            
            if (typeof fn === "function") {
                writable = !!writable;
                
                handler = function () {
                    return fn(caller, wrapArgs(slice.call(arguments)));
                };
            } else {
                writable = !!fn;
                
                handler = function () {
                    return caller(slice.call(arguments));
                };
            }
            
            proxy = exportProperty(target, name, handler, writable);
            proxy.isProxy = true;
        }
        
        return target[name];
    }
    
    function extractString(script, options) {
        var endIndex, string,
            startIndex = 0;

        options = options || {};
        
        if (options.hasOwnProperty("before")) {
            startIndex = script.indexOf(options.before) + options.before.length;
        }
        
        if (!options.hasOwnProperty("separator")) {
            options.separator = "'";
        }

        if (!options.hasOwnProperty("start")) {
            options.start = "";
        }
        
        if (startIndex > -1) {
            startIndex = script.indexOf(options.separator + options.start, startIndex) + 1;
            endIndex = script.indexOf(options.separator, startIndex);

            string = script.substring(startIndex, endIndex);
        } else {
            string = null;
        }
        
        return string;
    }
    
    function DAD(config) {
        if (typeof config === "function") {
            config = config(unsafeWindow, utils);
        }
        
        debug = !!config.debug;
        
        if (typeof config.css === "string") {
            injectCSS(config.css);
        }
        
        if (typeof config.exports === "object") {
            exportProperties(unsafeWindow, config.exports);
        }
        
        if (typeof config.init === "function") {
            window.addEventListener("DOMContentLoaded", config.init, true);
        }
    }
    
    utils = {
        noop: noop,
        createProxy: createProxy,
        extractString: extractString
    };
    
    return DAD;
}(this, unsafeWindow));