From 7875671cbbbd1d248faedabd58c0a61dc886ec26 Mon Sep 17 00:00:00 2001
From: Shaun Hamilton <shauhami020@gmail.com>
Date: Thu, 19 Oct 2023 13:20:47 +0200
Subject: [PATCH] chore(stock-price-checker): check input

---
 apps/stock-price-checker/controllers/stockHandler.js | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/apps/stock-price-checker/controllers/stockHandler.js b/apps/stock-price-checker/controllers/stockHandler.js
index 036ebd2ae..02ba1bd8a 100644
--- a/apps/stock-price-checker/controllers/stockHandler.js
+++ b/apps/stock-price-checker/controllers/stockHandler.js
@@ -12,6 +12,10 @@ const request = require('request');
 
 function StockHandler() {
   this.getData = function(stock, callback) {
+    if (!isValidStock(stock)) {
+      callback('stockData', { error: 'invalid symbol' });
+      return;
+    }
     request(
       `https://stock-price-checker-proxy.freecodecamp.rocks/v1/stock/${stock}/quote`,
       function(error, response, body) {
@@ -68,4 +72,10 @@ function StockHandler() {
   };
 }
 
+const validTickerRegExp = /^[a-z]{1,6}$/;
+const isValidStock = (stock) => {
+  const stockL = stock.toLowerCase().trim();
+  validTickerRegExp.test(stockL);
+}
+
 module.exports = StockHandler;