feat: ianaTimezoneSchema

Author: kirillgroshkov

src/validation/joi/joi.shared.schemas.test.ts

@@ -20,6 +20,7 @@ import {
   numberEnumValueSchema,
   numberEnumKeySchema,
   dateIntervalStringSchema,
+  ianaTimezoneSchema,
 } from './joi.shared.schemas'
 import { isValid, validate } from './joi.validation.util'
 
@@ -163,3 +164,15 @@ test('dateIntervalSchema', () => {
     validate('2022-01-01/2022-01-02/2022-01-03', schema),
   ).toThrowErrorMatchingInlineSnapshot(`"must be a DateInterval string"`)
 })
+
+test('ianaTimezoneSchema', () => {
+  const schema = ianaTimezoneSchema
+
+  validate('Europe/London', schema)
+  expect(() => validate(undefined, schema)).toThrowErrorMatchingInlineSnapshot(
+    `""value" is required"`,
+  )
+  expect(() => validate('London', schema)).toThrowErrorMatchingInlineSnapshot(
+    `"must be a valid IANA timezone string"`,
+  )
+})

src/validation/joi/joi.shared.schemas.ts

@@ -156,6 +156,12 @@ export const utcOffsetSchema = numberSchema
   .max(14 * 60)
   .dividable(15)
 
+const supportedTimezones = new Set(Intl.supportedValuesOf('timeZone'))
+
+export const ianaTimezoneSchema = stringSchema.valid(...supportedTimezones).messages({
+  'any.only': `must be a valid IANA timezone string`,
+})
+
 export const ipAddressSchema = stringSchema.ip()
 
 export const baseDBEntitySchema: ObjectSchema<BaseDBEntity> = objectSchema<BaseDBEntity>({