feat: standardize admin form limits and guidance

controllers/bookingController.js

@@ -2,6 +2,17 @@ const fs = require('fs');
 const path = require('path');
 const { addBaseUrlToImages } = require("../utils/imageHelper");
 const Booking = require("../models/booking");
+const {
+  validateLengthRules,
+  summarizeLengthErrors,
+} = require("../utils/lengthValidation");
+const {
+  BOOKING_LENGTH_RULES,
+} = require("../constants/contentLengthRules");
+
+const getBookingLengthMessage = (validation) =>
+  summarizeLengthErrors(validation, 3) ||
+  "One or more fields exceed the allowed length.";
 
 // -------------------- Public helpers --------------------
 const getBookingData = async () => {
@@ -398,6 +409,12 @@ exports.update = async (req, res) => {
       return req.session.save(() => res.redirect("/admin/booking"));
     }
 
+    const lengthValidation = validateLengthRules(updateData, BOOKING_LENGTH_RULES);
+    if (!lengthValidation.valid) {
+      req.flash("error_msg", getBookingLengthMessage(lengthValidation));
+      return req.session.save(() => res.redirect("/admin/booking"));
+    }
+
     // Validate data structure
     const validation = validateBookingData(updateData);
     if (!validation.isValid) {
@@ -546,4 +563,4 @@ const getFinalBooking = (staticBooking, dbBooking) => {
   }
   
   return merged;
-};
+};