[User script] StackExchange Chat: Unstar from transcript

stackexchange-chat-unstar-transcript.user.js

// ==UserScript==
// @id stackexchange-chat-unstar-transcript@poke
// @name StackExchange Chat: Unstar from transcript
// @namespace poke
// @version 1.0.0
// @author Patrick Westerhoff
// @include http://chat.stackoverflow.com/transcript/*
// @homepageURL https://gist.github.com/poke/d1fd6b5227efc5885cac
// @updateURL https://gist.githubusercontent.com/poke/d1fd6b5227efc5885cac/raw/stackexchange-chat-unstar-transcript.user.js
// @run-at document-end
// ==/UserScript==
(function () {
	var fkey = 'fkey=' + document.querySelector("input[name='fkey']").value;
	Array.prototype.forEach.call(document.querySelectorAll('.message'), function (message) {
		var id = message.id.substring(8);
		var link = message.querySelector('a');
		var stars = message.querySelector('.flash .stars');

		if (stars) {
			stars.title = 'Cancel all stars';
			stars.style.cursor = 'pointer';
			stars.addEventListener('click', function () {
				if (confirm('Do you want to cancel all stars?')) {
					var xhr = new XMLHttpRequest();
					xhr.open('post', '/messages/' + id + '/unstar', true);
					xhr.onload = function () {
						window.location.href = link;
					};
					xhr.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
					xhr.send(fkey);
				}
			});
		}
	});
})();