src/Biz/OrderFacade/Command/Deduct/AvailableCouponCommand.php

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<?php

namespace Biz\OrderFacade\Command\Deduct;

use Biz\Card\Service\CardService;
use Biz\Coupon\Service\CouponService;
use Biz\Course\Service\CourseService;
use Biz\OrderFacade\Command\Command;
use Biz\OrderFacade\Product\Product;

class AvailableCouponCommand extends Command
{
    public function execute(Product $product, $params = array())
    {
        $availableCoupons = $this->availableCouponsByIdAndType($product->targetId, $product->targetType);

        if ($availableCoupons) {
            foreach ($availableCoupons as $key => &$coupon) {
                if ($product->promotionPrice) {
                    $coupon['deduct_amount'] = $this->getCouponService()->getDeductAmount($coupon, $product->promotionPrice);
                } else {
                    $coupon['deduct_amount'] = $this->getCouponService()->getDeductAmount($coupon, $product->originPrice);
                }
            }
        }

        $product->availableDeducts['coupon'] = $this->availableCouponsSort($availableCoupons, $product);
    }

    /**
     * 对可用的优惠券进行排序
     * 1.专属优惠券排在前面
     * 2.面额从大到小
     * 3.到期日期从小至大
     * 4.创建日期从小至大
     *
     * @return array
     */
    private function availableCouponsSort($availableCoupons = array(), $product)
    {
        if ('course' == $product->targetType) {
            $course = $this->getCourseService()->getCourse($product->targetId);
            $targetId = $course['courseSetId'];
        } else {
            $targetId = $product->targetId;
        }

        $exclusiveCoupons = array();
        $unexclusiveCoupons = array();

        foreach ($availableCoupons as $availableCoupon) {
            if ($availableCoupon['targetType'] == $product->targetType && $availableCoupon['targetId'] == $targetId) {
                $exclusiveCoupons[] = $availableCoupon;
            } else {
                $unexclusiveCoupons[] = $availableCoupon;
            }
        }

        usort($exclusiveCoupons, array($this, 'compareCoupon'));