feat: validate optional membership number for non-logged in users

components/HotelReservation/EnterDetails/Details/schema.ts

@@ -16,6 +16,21 @@ export const notJoinDetailsSchema = baseDetailsSchema.merge(
     zipCode: z.string().optional(),
     dateOfBirth: z.string().optional(),
     termsAccepted: z.boolean().default(false),
+    membershipNo: z
+      .string()
+      .optional()
+      .refine((val) => {
+        if (val) {
+          return !val.match(/[^0-9]/g)
+        }
+        return true
+      }, "Only digits are allowed")
+      .refine((num) => {
+        if (num) {
+          return num.length === 14
+        }
+        return true
+      }, "Membership number needs to be 14 digits"),
   })
 )
 
@@ -33,6 +48,7 @@ export const joinDetailsSchema = baseDetailsSchema.merge(
         return { message: ctx.defaultError }
       },
     }),
+    membershipNo: z.string().optional(),
   })
 )