添加结算页可用优惠券的数目

@@ -546,7 +546,10 @@ class CartModel
             isset($orderInfo['msg']) && $result['msg'] = $orderInfo['msg'];
 
             // 优惠券数据
-            $coupons = array('couponName' => '');
+            $coupons = array(
+                'couponName' => '',
+                'count' => self::getValidCouponCount($uid)
+            );
             if (isset($orderCompute['coupon_amount']) && (!empty($orderCompute['coupon_amount']) || ($orderCompute['coupon_amount'] === 0 && $orderCompute['shipping_cost'] === 0))) {
                 $coupons['couponName'] = $orderInfo['couponName'];
             }
@@ -558,6 +561,24 @@ class CartModel
     }
 
     /**
+     * 购物车结算--获取可用的优惠券数目
+     *
+     * @param int $uid 用户ID
+     * @return int 可用优惠券的数目
+     */
+    private static function getValidCouponCount($uid)
+    {
+        $count = 0;
+
+        $validCount = CartData::getValidCouponCount($uid);
+        if (isset($validCount['data']['count'])) {
+            $count = intval($validCount['data']['count']);
+        }
+
+        return $count;
+    }
+
+    /**
      * 购物车结算--支付方式和配送方式选择以及是否使用YOHO币接口返回的数据处理
      *
      * @param int $uid 用户ID
@@ -630,15 +651,9 @@ class CartModel
             }
 
             // 不可用的优惠券
-            $notValidCoupons = self::procCouponsData($coupons['data']['unusable_coupons']);
-            if (!empty($notValidCoupons)) {
-                $result['notAvailableCoupons'] = $notValidCoupons;
-            }
+            $result['notAvailableCoupons'] = self::procCouponsData($coupons['data']['unusable_coupons']);
             // 可用优惠券
-            $validCoupons = self::procCouponsData($coupons['data']['usable_coupons']);
-            if (!empty($validCoupons)) {
-                $result['coupons'] = $validCoupons;
-            }
+            $result['coupons'] = self::procCouponsData($coupons['data']['usable_coupons']);
         } while (false);
 
         return $result;