Add support for ULID validation

src/defaults.ts

@@ -40,6 +40,7 @@ export const messages = {
   'notIn': 'The selected {{ field }} is invalid',
   'ipAddress': 'The {{ field }} field must be a valid IP address',
   'uuid': 'The {{ field }} field must be a valid UUID',
+  'ulid': 'The {{ field }} field must be a valid ULID',
   'hexCode': 'The {{ field }} field must be a valid hex color code',
 
   'boolean': 'The value must be a boolean',

src/schema/string/main.ts

@@ -23,6 +23,7 @@ import {
   urlRule,
   jwtRule,
   uuidRule,
+  ulidRule,
   trimRule,
   ibanRule,
   alphaRule,
@@ -66,6 +67,7 @@ export class VineString extends BaseLiteralType<string, string, string> {
     url: urlRule,
     iban: ibanRule,
     uuid: uuidRule,
+    ulid: ulidRule,
     trim: trimRule,
     email: emailRule,
     alpha: alphaRule,
@@ -327,6 +329,13 @@ export class VineString extends BaseLiteralType<string, string, string> {
     return this.use(uuidRule(...args))
   }
 
+  /**
+   * Validates the value to be a valid ULID
+   */
+  ulid() {
+    return this.use(ulidRule())
+  }
+
   /**
    * Validates the value contains ASCII characters only
    */

src/schema/string/rules.ts

@@ -592,6 +592,19 @@ export const uuidRule = createRule<{ version?: (1 | 2 | 3 | 4 | 5)[] } | undefin
   }
 )
 
+/**
+ * Validates the value to be a valid ULID
+ */
+export const ulidRule = createRule((value, _, field) => {
+  if (!field.isValid) {
+    return
+  }
+
+  if (!helpers.isULID(value as string)) {
+    field.report(messages.ulid, 'ulid', field)
+  }
+})
+
 /**
  * Validates the value contains ASCII characters only
  */

src/vine/helpers.ts

@@ -35,6 +35,8 @@ import type { FieldContext } from '../types.js'
 const BOOLEAN_POSITIVES = ['1', 1, 'true', true, 'on']
 const BOOLEAN_NEGATIVES = ['0', 0, 'false', false]
 
+const ULID = /^[0-9A-HJKMNP-TV-Za-hjkmnp-tv-z]{26}$/
+
 /**
  * Collection of helpers used across the codebase to coerce
  * and type-check values from HTML forms.
@@ -228,6 +230,23 @@ export const helpers = {
     'US',
   ] as const,
 
+  /**
+   * Check if the value is a valid ULID
+   */
+  isULID(value: unknown): boolean {
+    if (typeof value !== 'string') {
+      return false
+    }
+
+    // Largest valid ULID is '7ZZZZZZZZZZZZZZZZZZZZZZZZZ'
+    // https://github.com/ulid/spec#overflow-errors-when-parsing-base32-strings
+    if (value[0] > '7') {
+      return false
+    }
+
+    return ULID.test(value)
+  },
+
   /**
    * Check if the value is a valid color hexcode
    */

tests/unit/rules/string.spec.ts

@@ -36,6 +36,7 @@ import {
   passportRule,
   postalCodeRule,
   uuidRule,
+  ulidRule,
   asciiRule,
   ibanRule,
   jwtRule,
@@ -1288,6 +1289,46 @@ test.group('String | uuid', () => {
     .run(stringRuleValidator)
 })
 
+test.group('String | ulid', () => {
+  test('validate {value}')
+    .with([
+      {
+        errorsCount: 1,
+        rule: ulidRule(),
+        value: 22,
+        error: 'The dummy field must be a string',
+      },
+      {
+        errorsCount: 1,
+        rule: ulidRule(),
+        value: 22,
+        bail: false,
+        error: 'The dummy field must be a string',
+      },
+      {
+        errorsCount: 1,
+        rule: ulidRule(),
+        value: '1999010301',
+        error: 'The dummy field must be a valid ULID',
+      },
+      {
+        rule: ulidRule(),
+        value: '01HZW62CR5FNVW4PSXVXC1HTZF',
+      },
+      {
+        rule: ulidRule(),
+        value: '7ZZZZZZZZZZZZZZZZZZZZZZZZZ',
+      },
+      {
+        errorsCount: 1,
+        rule: ulidRule(),
+        value: '80000000000000000000000000',
+        error: 'The dummy field must be a valid ULID',
+      },
+    ])
+    .run(stringRuleValidator)
+})
+
 test.group('String | ascii', () => {
   test('validate {value}')
     .with([

tests/unit/schema/string.spec.ts

@@ -38,6 +38,7 @@ import {
   passportRule,
   postalCodeRule,
   uuidRule,
+  ulidRule,
   asciiRule,
   ibanRule,
   jwtRule,
@@ -667,6 +668,11 @@ test.group('VineString | applying rules', () => {
         schema: vine.string().uuid(),
         rule: uuidRule(),
       },
+      {
+        name: 'ulid',
+        schema: vine.string().ulid(),
+        rule: ulidRule(),
+      },
       {
         name: 'ascii',
         schema: vine.string().ascii(),