目录结构调整

core/extend/com/Cart.php

@@ -0,0 +1,114 @@
+<?php
+// +----------------------------------------------------------------------
+// | SentCMS [ WE CAN DO IT JUST THINK IT ]
+// +----------------------------------------------------------------------
+// | Copyright (c) 2013 http://www.tensent.cn All rights reserved.
+// +----------------------------------------------------------------------
+// | Author: molong <molong@tensent.cn> <http://www.tensent.cn>
+// +----------------------------------------------------------------------
+
+namespace com;
+
+class Cart{
+
+	private $goods = 'book';
+	private $items = array();
+
+	public function __construct(){
+		$this->items = session('sent_cart') ? session('sent_cart') : array();
+	}
+
+	/**
+	 * 添加购物车
+	 * @param integer $id  商品ID标识
+	 * @param integer $num  添加的数量
+	 */
+	public function addItem($id,$num=1) {
+		if ($this->hasItem($id)) {
+			$this->incNum($id,$num);
+			return;
+		}
+		$this->items[$id] = $num;
+		session('sent_cart', $this->items);
+	}
+
+	/**
+	 * 判断是否有某个商品
+	 * @param  integer   $id  商品ID标识
+	 * @return boolean
+	 */
+	protected function hasItem($id) {
+		return isset($this->items[$id]);
+	}
+
+	/**
+	 * 删除商品
+	 * @param  integer   $id  商品ID标识
+	 */
+	public function delItem($id) {
+		unset($this->items[$id]);
+		session('sent_cart', $this->items);
+	}
+
+	public function modNum($id,$num=1) {
+		if (!$this->hasItem($id)) {
+			return false;
+		}
+		$this->items[$id] = $num;
+		session('sent_cart', $this->items);
+	}
+
+	public function incNum($id,$num=1) {
+		if ($this->hasItem($id)) {
+			$this->items[$id] += $num;
+		}
+		session('sent_cart', $this->items);
+	}
+
+	public function decNum($id,$num=1) {
+		if ($this->hasItem($id)) {
+			$this->items[$id] -= $num;
+		}
+		if ($this->items[$id] <1) {
+			$this->delItem($id);
+		}
+		session('sent_cart', $this->items);
+	}
+
+	public function getCount() {
+		return count($this->items);
+	}
+
+	public function getNum(){
+		if ($this->getCount() == 0) {
+			return 0;
+		}
+
+		$sum = 0;
+		foreach ($this->items as $item) {
+			$sum += $item;
+		}
+		return $sum;
+	}
+
+	public function all(){
+		$list = array();
+		foreach ($this->items as $key => $value) {
+			$goods = \think\Db::name($this->goods)->where(array('id'=>$key))->find();
+			$list[] = array(
+				'id'          => $goods['id'],
+				'name'        => $goods['book_name'],
+				'price'       => $goods['price'],
+				'cover_id'    => $goods['cover_id'],
+				'price_count' => $value*$goods['price'],
+				'num'         => $value
+			);
+		}
+		return $list;
+	}
+
+	public function clear() {
+		$this->items = array();
+		session('sent_cart', $this->items);
+	}
+}