Hello World KRL

hello.krl

ruleset HelloWorldApp {
  rule Excercise1 is active {
    select when pageview ".*"
    {
      notify("Hello World", "This is a sample rule.") with sticky = true;
      notify("Another One", "Notification 2.") with sticky = true;
    }
  }

  rule Exercise4 is active {
    select when pageview ".*"
    pre {
      qs = page:url("query");

      name = qs.extract(re/name=([^&]*)/);
      name = (name[0] neq "") => name[0] | "Monkey";
    }
    notify("Query string", "Hello " + name) with sticky = true;
  }

  rule Excercise6 is active {
    select when pageview ".*"
    pre {
      qs = page:url("query").split(re/&/);
      reset = qs.any(function(q) { q eq "clear" });
    }
    if reset then notify("Reset count", "Count reset")
    fired {
      clear ent:count
    }
  }

  rule Excercise5 is active {
    select when pageview ".*"
    if ent:count <= 4 then
      notify("Only 5 times", "Count: " + ent:count) with sticky = true;
    always {
      ent:count += 1 from 0;
    }
  }
}