可以用试课预约，第二部分

application/admin/controller/Lessonslot.php

@@ -85,7 +85,7 @@ class Lessonslot extends Backend
             $this->error('请刷新重试');
         }
         if($info['status'] != 0){
-            $this->error('当前课程不能预约');
+            $this->error('当前课程不能预约');//状态:0=报名中,20=已点名,30=已取消
         }
         if($this->request->isPost()){
             $user_id = input('user_id',0,'intval');
@@ -93,11 +93,19 @@ class Lessonslot extends Backend
             $slot_id = input('slot_id',0,'intval');
             $number  = input('number',1,'intval');
             $remark  = input('remark','','trim');
-            $paytype = 1;//支付类型:1=课程套餐,2=线上付款,3=购买套餐中,4=试课单
+
             $packageorder_id = input('packageorder_id',0,'intval');
+            $trylessonorder_id = input('trylessonorder_id',0,'intval');
+
+            $params = $this->request->post('row/a');
+            $paytype = $params['paytype'];//支付类型:1=课程套餐,4=试课单
+
             if($number <= 0){
                 $this->error('预约人数错误');
             }
+            if($paytype == 4){
+                $number = 1; //试课只能选一个人
+            }
 
             //课时
             $info = Db::name('lesson_slot')->alias('slot')
@@ -208,6 +216,56 @@ class Lessonslot extends Backend
                 Db::commit();
                 $this->success('预约成功');
             }
+            elseif($paytype == 4){
+                //使用试课单
+                $map = [
+                    'id' => $trylessonorder_id,
+                    'user_id' =>$user_id,
+                    'endtime' => ['gt',time()],
+                    'order_status' => 10,
+                ];
+                $trylesson_order = Db::name('trylesson_order')->where($map)->where('find_in_set(:lesson_ids,lesson_ids)', ['lesson_ids' => $info['lesson_id']])->lock(true)->find();
+                if(!$trylesson_order){
+                    Db::rollback();
+                    $this->error('未找到对应的试课');
+                }
+
+                //修改预约单数据
+                $lesson_order['order_amount'] = 0;
+                $lesson_order['order_status'] = 10;
+                $lesson_order['paytime'] = time();
+                $lesson_order['trylesson_order_id'] = $trylessonorder_id;
+
+                //预约单写入
+                $lesson_order_id = Db::name('lesson_order')->insertGetId($lesson_order);
+                if(!$lesson_order_id){
+                    Db::rollback();
+                    $this->error('预约失败');
+                }
+
+                //改掉试课单状态
+                $update = [
+                    'order_status'    => 20,
+                    'updatetime'      => time(),
+                    'lesson_order_id' => $lesson_order_id,
+                ];
+                $rs1 = Db::name('trylesson_order')->where('id',$trylessonorder_id)->update($update);
+                if($rs1 === false){
+                    Db::rollback();
+                    $this->error('使用试课失败');
+                }
+
+                //更新已预约人数
+                $pay_number = Db::name('lesson_order')->where('slot_id',$slot_id)->where('order_status',10)->sum('usernumber');
+                $rs_slot = Db::name('lesson_slot')->where('id',$slot_id)->update(['bookednum' => $pay_number]);
+                if($rs_slot === false){
+                    Db::rollback();
+                    $this->error('预约失败');
+                }
+
+                Db::commit();
+                $this->success('预约成功');
+            }
         }
         $this->view->assign('row',$info);
         return $this->view->fetch();