src/Biz/OrderFacade/Product/CourseProduct.php

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<?php

namespace Biz\OrderFacade\Product;

use Biz\Accessor\AccessorInterface;
use Biz\Course\Service\CourseService;
use Biz\Course\Service\CourseSetService;
use Biz\Course\Service\MemberService;
use Biz\OrderFacade\Exception\OrderPayCheckException;
use Biz\Course\Util\CourseTitleUtils;
use Codeages\Biz\Order\Status\OrderStatusCallback;

class CourseProduct extends Product implements OrderStatusCallback
{
    const TYPE = 'course';

    public $showTemplate = 'order/show/course-item.html.twig';

    public $targetType = self::TYPE;

    public $courseSet;

    /**
     * 课程展示价格
     *
     * @var float
     */
    public $price;

    public function init(array $params)
    {
        $this->targetId = $params['targetId'];
        $course = $this->getCourseService()->getCourse($this->targetId);
        $this->backUrl = array('routing' => 'course_show', 'params' => array('id' => $this->targetId));
        $this->successUrl = array('my_course_show', array('id' => $this->targetId));
        $this->courseSet = $this->getCourseSetService()->getCourseSet($course['courseSetId']);
        $this->title = CourseTitleUtils::getDisplayedTitle($course);
        if (empty($this->title) && isset($params['orderItemId'])) {
            $orderItem = $this->getOrderService()->getOrderItem($params['orderItemId']);
            $this->title = $orderItem['title'];
        }
        $this->price = $course['price'];
        $this->originPrice = $course['originPrice'];
        $this->maxRate = $course['maxRate'];
        $this->cover = $this->courseSet['cover'];
    }

    public function validate()
    {
        $access = $this->getCourseService()->canJoinCourse($this->targetId);

        $course = $this->getCourseService()->getCourse($this->targetId);

        if (!$course['buyable']) {
            throw OrderPayCheckException::UNPURCHASABLE_PRODUCT();
        }

        if (AccessorInterface::SUCCESS !== $access['code']) {
            throw OrderPayCheckException::UNPURCHASABLE_PRODUCT();
        }