ga_scraper.js

(function (w) {
	var uuid = 'capture_xxxxxxxx_xxxx_4xxx_yxxx_xxxxxxxxxxxx'.replace(
		/[xy]/g,
		function (c) {
			var r = (Math.random() * 16) | 0,
				v = c == 'x' ? r : (r & 0x3) | 0x8;
			return v.toString(16);
		}
	);

	w[uuid] = function (cmd, data) {
		if (!/test/.test(cmd)) return;

		dataLayer.push({
			event: 'purchase',
			transactionId: data.id,
			transactionTotal: data.cost,
			transactionProducts: []
		});
	};
	var matches = document.body.innerHTML.match(/ga\([^)]*\)/g);
	var i = matches.length;
	while (i--) {
		var match = matches[i];
		var code = match.replace(/^ga/, uuid);
		eval(code);
	}
})(window);