Addressed PR comments

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

@@ -3,26 +3,40 @@ import z from "zod";
 
 import { CharacterType, characterValidator } from "@app/lib/validator/validate-string";
 
-export const validateTemplateRegexField = z
-  .string()
-  .min(1)
-  .max(100)
-  .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"
-  });
+export const createTemplateFieldValidator = (options?: {
+  minLength?: number;
+  maxLength?: number;
+  allowedCharacters?: CharacterType[];
+  customMessage?: string;
+}) => {
+  const {
+    minLength = 1,
+    maxLength = 100,
+    allowedCharacters = [
+      CharacterType.AlphaNumeric,
+      CharacterType.Spaces, // (space)
+      CharacterType.Asterisk, // *
+      CharacterType.At, // @
+      CharacterType.Hyphen, // -
+      CharacterType.Period, // .
+      CharacterType.Backslash // \
+    ],
+    customMessage = "Invalid pattern: only alphanumeric characters, spaces, *, ., @, -, and \\ are allowed."
+  } = options || {};
+
+  return (
+    z
+      .string()
+      .min(minLength)
+      .max(maxLength)
+      .refine((val) => characterValidator(allowedCharacters)(val), {
+        message: customMessage
+      })
+      // we ensure that the inputted pattern is computationally safe by limiting star height to 1
+      .refine((v) => safe(v), {
+        message: "Unsafe REGEX pattern"
+      })
+  );
+};
+
+export const validateTemplateRegexField = createTemplateFieldValidator();