status pattern

StatusPattern/StatusPattern.php

@@ -0,0 +1,127 @@
+<?php
+namespace DesignPatterns;
+
+
+/**
+* The order has two status: created, shipping, completed.
+* When the order's status is created, what can do is just 'shipping' handle;
+* When the order's status is shipping, what can do is just 'completed' handle;
+* 
+*/
+interface OrderInterface 
+{
+
+	public function shipOrder();
+
+	public function completeOrder();
+
+}
+
+class CreateOrder implements OrderInterface
+{
+
+	private $order;
+
+	public function __construct(array $order)
+	{
+		if (empty($order)) {
+			throw new \Exception('Order can not be empty!');
+		}
+		$this->order = $order;
+	}
+
+	public function shipOrder()
+	{
+		$this->order['status'] = 'shipping';
+		$this->order['updatedTime'] = time();
+		// Setting the new order status into database;
+		return $this->updateOrder($order);
+	}
+
+	public function completeOrder()
+	{
+		//Can not complete the order which status is created, throw exception;
+		throw new \Exception('Can not complete the order which status is created!');
+	}
+}
+
+class ShippingOrder implements OrderInterface
+{
+
+	private $order;
+
+	public function __construct(array $order)
+	{
+		if (empty($order)) {
+			throw new \Exception('Order can not be empty!');
+		}
+		$this->order = $order;
+	}
+
+	public function shipOrder()
+	{
+		//Can not ship the order which status is shipping, throw exception;
+		throw new \Exception('Can not ship the order which status is shipping!');
+	}
+
+	public function completeOrder()
+	{
+		$this->order['status'] = 'completed';
+		$this->order['updatedTime'] = time();
+		// Setting the new order status into database;
+		return $this->updateOrder($order);
+	}
+}
+
+
+class OrderFactory {
+
+	public static function getOrder($id)
+	{
+		$order = 'Get Order From Database';
+
+		switch ($order['status']) {
+			case 'created':
+				return new CreateOrder($order);
+			case 'shipping':
+				return new ShippingOrder($order);
+			default:
+				throw new \Exception('Order status error!');
+				break;
+		}
+	}
+
+	private function __construct()
+	{
+		throw Exception('Can not instance the OrderFactory class!');
+	}
+}
+
+
+// Client
+
+Class OrderControler {
+
+	public function shipAction($id)
+	{
+		$order = OrderFactory::getOrder($id);
+		try {
+			$order->shipOrder($id);
+		} catch (Exception $e) {
+			//handle error!
+		}
+		// response to browser 
+	}
+
+	public function completeAction($id)
+	{
+		$order = OrderFactory::getOrder($id);
+		try {
+			$order->completeOrder($id);
+		} catch (Exception $e) {
+			//handle error!
+		}
+		// response to browser 
+	}
+
+}