Auto prepend reference number with 00 if no standard models are used …

…(97,11,22)

lib/schema.js

@@ -86,6 +86,15 @@ module.exports = yup.object({
     .string()
     .min(0)
     .max(35)
+    .transform((value) => {
+      // IPS QR code requires 97, 22, 11 as model, if no model is used it needs to be indicated by prepending it with 00
+      // https://web.archive.org/web/20220109065457/https://nbs.rs/QRcode/info.html
+      const model = value.slice(0, 2);
+      if (["97", "22", "11"].contains(model)) {
+        return value;
+      }
+      return `00${value}`;
+    })
     .test(
       "poziv-na-broj",
       "Model i poziv na broj moraju da prate sledeci format: MMKKBBB...B (MM-model, KK-kontrolni broj, BBB...B broj)",