Hi Scott,
Processing script runs on server side. Angular however is a client side framework. So, u need to create your custom button that will call a function on client side. You can access any jelly variable on client side. Moreover, you can write any GlideRecord logic in g:evaluate tag.
I created a test UI Page for you. Copy and paste the code given below. Give it name 'test_page' and save it. Now go to "<instance-name>/test_page.do?sysparm_sys_id=12345". Click the button and you shall see 12345 passed in url.
<?xml version="1.0" encoding="utf-8" ?>
<j:jelly trim="false" xmlns:j="jelly:core" xmlns:g="glide" xmlns:j2="null" xmlns:g2="null">
<html>
<script>http://ajax.googleapis.com/ajax/libs/angularjs/1.3.14/angular.min.js"></script>
<body>
<div ng-app="myApp" ng-controller="myCtrl">
First Name: <input type="text" ng-model="firstName"></input><br/>
Last Name: <input type="text" ng-model="lastName"></input><br/>
<br/>
Full Name: {{firstName + " " + lastName}}
<br/>
<button type="button" ng-click='f()'>Click Me!</button>
</div>
<script>
var app = angular.module('myApp', []);
app.controller('myCtrl', function($scope) {
$scope.firstName = "Yetesh";
$scope.lastName = "Chaudhary";
$scope.f = function ()
{
alert("I m clicked ${sysparm_sys_id}");
}
});
</script>
</body>
</html>
</j:jelly>
Hope it helps!
