update CourseOrderServiceImpl

src/main/java/cn/seecoder/courselearning/serviceimpl/CourseOrderServiceImpl.java

@@ -23,8 +23,13 @@ public class CourseOrderServiceImpl implements CourseOrderService {
 
     @Override
     public ResultVO<CourseOrderVO> insertCourseOrder(CourseOrderVO orderVO) {
-        CourseOrder order = new CourseOrder(orderVO);
+        CourseOrder order;
         try{
+            if((order = orderMapper.queryMostRecentOrder(orderVO.getUserId(), orderVO.getCourseId())) != null
+                && !order.getStatus().equals(Constant.ORDER_STATUS_CANCEL)){
+                return new ResultVO<>(Constant.REQUEST_FAIL, "当前用户已经购买过此课程，或者有上一笔未支付的订单", new CourseOrderVO(order));
+            }
+            order = new CourseOrder(orderVO);
             Integer status = order.getStatus();
             if(status.equals(Constant.ORDER_STATUS_UNPAID)){
                 // 当订单状态为未支付时，检查用户余额是否足够
@@ -35,24 +40,28 @@ public class CourseOrderServiceImpl implements CourseOrderService {
                     order.setStatus(Constant.ORDER_STATUS_SUCCESS);
                     orderMapper.insert(order);
                 }else {
+                    // 将订单存入数据库
+                    orderMapper.insert(order);
                     // 若用户余额不足，则不保存订单，返回失败信息
-                    return new ResultVO<>(Constant.REQUEST_FAIL, "用户余额不足");
+                    return new ResultVO<>(Constant.REQUEST_FAIL, "用户余额不足，未支付订单已保存", new CourseOrderVO(order));
                 }
             }else if(status.equals(Constant.ORDER_STATUS_SUCCESS) || status.equals(Constant.ORDER_STATUS_WAIT)) {
-                // 若订单状态为已支付，则直接存入数据库
+                // 若订单状态为已支付或等待发货，则直接存入数据库
                 orderMapper.insert(order);
-                return new ResultVO<>(Constant.REQUEST_SUCCESS, "订单保存成功");
+                return new ResultVO<>(Constant.REQUEST_SUCCESS, "订单保存成功", new CourseOrderVO(order));
             }
         }catch (Exception e){
             return new ResultVO<>(Constant.REQUEST_FAIL, e.toString());
         }
-        return new ResultVO<>(Constant.REQUEST_SUCCESS, "操作成功", new CourseOrderVO(order));
+        return new ResultVO<>(Constant.REQUEST_SUCCESS, "课程购买成功", new CourseOrderVO(order));
     }
 
     @Override
     public ResultVO<CourseOrderVO> updateCourseOrder(Integer orderId, Integer orderStatus) {
         CourseOrder order = orderMapper.selectByPrimaryKey(orderId);
         if(order == null) return new ResultVO<>(Constant.REQUEST_FAIL, "找不到当前订单！");
+        if(order.getStatus().equals(Constant.ORDER_STATUS_SUCCESS))
+            return new ResultVO<>(Constant.REQUEST_FAIL, "当前订单已完成交易，不支持再次修改订单状态！", new CourseOrderVO(order));
         if((orderStatus.equals(Constant.ORDER_STATUS_SUCCESS)||orderStatus.equals(Constant.ORDER_STATUS_WAIT)) &&
                 order.getStatus().equals(Constant.ORDER_STATUS_UNPAID)){
             // 当订单原始状态为待支付 并且此时为支付成功时，需扣除用户余额
@@ -64,7 +73,7 @@ public class CourseOrderServiceImpl implements CourseOrderService {
         }
         order.setStatus(orderStatus);
         orderMapper.updateByPrimaryKey(order);
-        return new ResultVO<CourseOrderVO>(Constant.REQUEST_SUCCESS, "操作成功", new CourseOrderVO(order));
+        return new ResultVO<>(Constant.REQUEST_SUCCESS, "课程购买成功", new CourseOrderVO(order));
     }
 
     @Override