优惠券

routes/coupon.js

@@ -5,15 +5,28 @@ const { getDB } = require('../database');
 
 router.get('/', async (req, res) => {
   try {
+    const useId = req.query.user_id;
     const db = getDB();
     const query = `
-      SELECT * FROM coupon_products where remain > 0
+      SELECT * FROM coupon_products
     `
     const [coupon] = await db.query(query);
 
     if (coupon.length === 0) {
-      res.json({ error: '暂无优惠券' });
-    } 
+      res.json({ message: '暂无优惠券' });
+    }
+
+    for(const item of coupon) {
+      const query = `
+        SELECT * FROM coupon_use WHERE user_id = ? AND coupon_id = ?
+      `
+      const [couponExist] = await db.query(query, [useId, item.id]);
+      if (couponExist.length === 0) {
+        item.got = false;
+      } else {
+        item.got = true;
+      }
+    }
 
     res.json({coupon, success: true});
   } catch (error) {
@@ -22,37 +35,35 @@ router.get('/', async (req, res) => {
 });
 router.get('/:id', async (req, res) => {
   try {
-    const userId = req.params.id;
-    const couponId = req.body.coupon_id;
     const db = getDB();
-    const query = `
-      SELECT * FROM coupon_products where remain > 0
-    `
-    const [coupon] = await db.query(query);
 
-    if (coupon.length === 0) {
-      return res.status(404).json({ error: '暂无优惠券' });
+    const userId = req.params.id;
+    const receiveCouponId = req.query.coupon_id;
+
+    const query = `
+      SELECT * FROM coupon_use WHERE user_id = ? AND coupon_id = ?
+    `
+    const [couponExist] = await db.query(query, [userId, receiveCouponId]);
+
+    if (couponExist.length === 0) {
+
+      const insertQuery = `
+        INSERT INTO coupon_use (user_id, coupon_id, get_time) VALUES (?, ?, now())
+      `
+      await db.query(insertQuery, [userId, receiveCouponId]);
+
+      const updateQuery = `
+        UPDATE coupon_products SET remain = remain - 1 WHERE id = ?
+      `
+      await db.query(updateQuery, [receiveCouponId]);
+
     } else {
-      const query = [`
-        select * from coupon_use where user_id = ?
-      `,`
-        update coupon_products set remain = remain - 1 where id = ?
-      `,`
-        insert into coupon_use (user_id, coupon_id, get_time) values (?, ?, now())
-      `]
-      const [checkUser] = await db.query(query[0], [userId]);
-      console.log("12345",checkUser)
-      for (const item of checkUser) {
-        if (item.coupon_id === coupon[0].id && item.use_time === null) {
-          return res.status(400).json({ error: '优惠券已领取' });
-        }
-      }
-      await db.query(query[1], [coupon[0].id]);
-      await db.query(query[2], [userId, coupon[0].id]);
+      return res.status(500).json({ error: '已有该优惠券' });
     }
 
-    res.json({coupon, success: true});
+    res.json({success: true});
   } catch (error) {
+    console.log(error);
     res.status(500).json({ error: '获取优惠券失败' });
   }
 });