add order api

simple_api/api/index.js

@@ -34,4 +34,21 @@ router.get('/users', (req, res, next) => {
   reply(res, users);
 });
 
+const min = (m) => `you ordered for $${m}, but the min order amount is $50`;
+const max = (m) => `you ordered for $${m}, but the max order amount is $200`;
+
+router.post('/order', function (req, res, next) {
+  try {
+    const total = req.body
+      .map((it) => products.find((p) => p.id === it.id).price * it.amount)
+      .reduce((acc, next) => acc + next, 0);
+
+    if (total < 50) return reply(res, min(total), 3000, 400);
+    if (total > 200) return reply(res, max(total), 3000, 400);
+    return reply(res, 'ok', 3000);
+  } catch {
+    return reply(res, 'wrong data', 1000, 400);
+  }
+});
+
 module.exports = router;