Split index file into src/ folder components

src/requiredQueryMiddleware.js

@@ -0,0 +1,14 @@
+const { MissingTextError } = require("./errors.js");
+
+const requiredQueryMiddleware = (req, res, next) => {
+  const { text } = req.query;
+
+  if (!text || text?.length === 0) {
+    const error = new MissingTextError();
+    return res.status(error?.statusCode || 500).send(error?.message);
+  }
+
+  next();
+};
+
+module.exports = requiredQueryMiddleware;