private function validateAction(Action $action)
{
$name = $action->getName();
if (empty($name)) {
throw new \InvalidArgumentException("Action name is required");
}
$href = $action->getHref();
if (empty($href)) {
throw new \InvalidArgumentException("Action href is required");
}
}
$order = new Entity();
$order->addClass("order")->setProperties(array("orderNumber" => 42, "itemCount" => 3, "status" => "pending"));
$items = new Entity();
$items->addClass("items")->addClass("collection")->addRel("http://x.io/rels/order-items")->setHref("http://api.x.io/orders/42/items");
$order->addEntity($items);
$customerInfo = new Entity();
$customerInfo->addClass("info")->addClass("customer")->addRel("http://x.io/rels/customer")->setHref("http://api.x.io/customer")->setProperties(array("customerId" => "pj123", "name" => "Peter Joseph"));
$link = new Link();
$link->addRel("self")->setHref("http://api.x.io/customers/pj123");
$customerInfo->addLink($link);
$order->addEntity($customerInfo);
$orderNumber = new Field();
$orderNumber->setName("orderNumber")->setType("hidden")->setValue(42);
$productCode = new Field();
$productCode->setName("productCode");
$quantity = new Field();
$quantity->setName("quantity")->setType("number");
$action = new Action();
$action->setName("add-item")->setHref("http://api.x.io/orders/42/items")->setMethod("POST")->setTitle("Add Item")->addField($orderNumber)->addField($productCode)->addField($quantity);
$order->addAction($action);
$self = new Link();
$self->addRel("self")->setHref("http://api.x.io/orders/42");
$prev = new Link();
$prev->addRel("previous")->setHref("http://api.x.io/orders/41");
$next = new Link();
$next->addRel("next")->setHref("http://api.x.io/orders/43");
$order->addLink($self);
$order->addLink($prev);
$order->addLink($next);
$response = (new Encoder())->encode($order);
print_r(json_encode($response, JSON_UNESCAPED_SLASHES));
