feat: patched up regex issues

backend/src/services/certificate-template/certificate-template-validators.ts

@@ -1,13 +1,27 @@
 import safe from "safe-regex";
 import z from "zod";
 
+import { CharacterType, characterValidator } from "@app/lib/validator/validate-string";
+
 export const validateTemplateRegexField = z
   .string()
   .min(1)
   .max(100)
-  .regex(/^[a-zA-Z0-9 *@\-\\.\\]+$/, {
-    message: "Invalid pattern: only alphanumeric characters, spaces, *, ., @, -, and \\ are allowed."
-  })
+  .refine(
+    (val) =>
+      characterValidator([
+        CharacterType.AlphaNumeric,
+        CharacterType.Spaces, // (space)
+        CharacterType.Asterisk, // *
+        CharacterType.At, // @
+        CharacterType.Hyphen, // -
+        CharacterType.Period, // .
+        CharacterType.Backslash // \
+      ])(val),
+    {
+      message: "Invalid pattern: only alphanumeric characters, spaces, *, ., @, -, and \\ are allowed."
+    }
+  )
   // we ensure that the inputted pattern is computationally safe by limiting star height to 1
   .refine((v) => safe(v), {
     message: "Unsafe REGEX pattern"