JavaScriptBindable.php

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<?php

/* Copyright (c) 2016 Richard Klees <richard.klees@concepts-and-training.de> Extended GPL, see docs/LICENSE */

namespace ILIAS\UI\Implementation\Component;

trait JavaScriptBindable {
        private $on_load_code_binder = null;

        public function withOnLoadCode(\Closure $binder) {
                $this->checkBinder($binder);
                $clone = clone $this;
                $clone->on_load_code_binder = $binder;
                return $clone;
        }

        public function getOnLoadCode() {
                return $this->on_load_code_binder;
        }

        private function checkBinder(\Closure $binder) {
                $refl = new \ReflectionFunction($binder);
                $args = array_map(function($arg) { return $arg->name; }, $refl->getParameters());
                if (array("id") !== $args) {
                        throw new \InvalidArgumentException('Expected closure "$binder" to have exactly one argument "$id".');
                }
        }       
}