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39 lines
1.4 KiB
TypeScript
39 lines
1.4 KiB
TypeScript
import { z } from 'zod';
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/**
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* RFC 5322 compliant email regex.
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*
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* This is more permissive than Zod's built-in `.email()` validator which rejects
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* valid international characters (e.g. "Søren@gmail.com").
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*
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* Compiled once at module level to avoid re-compilation on every validation call.
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*/
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const EMAIL_REGEX =
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/^[a-zA-Z0-9.!#$%&'*+/=?^_`{|}~\u{0080}-\u{FFFF}-]+@[a-zA-Z0-9\u{0080}-\u{FFFF}](?:[a-zA-Z0-9\u{0080}-\u{FFFF}-]{0,61}[a-zA-Z0-9\u{0080}-\u{FFFF}])?(?:\.[a-zA-Z0-9\u{0080}-\u{FFFF}](?:[a-zA-Z0-9\u{0080}-\u{FFFF}-]{0,61}[a-zA-Z0-9\u{0080}-\u{FFFF}])?)*$/u;
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const DEFAULT_EMAIL_MESSAGE = 'Invalid email address';
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/**
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* Creates a Zod email schema using an RFC 5322 compliant regex.
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*
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* Supports international characters in the local part and domain
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* (e.g. "Søren@gmail.com", "user@dömain.com").
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*
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* Returns a standard `ZodString` so all string methods are chainable:
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* `.min()`, `.max()`, `.trim()`, `.toLowerCase()`, `.optional()`, `.nullish()`, etc.
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*
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* @example
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* ```ts
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* zEmail()
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* zEmail().min(1).max(254)
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* zEmail().trim().toLowerCase()
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* zEmail('Email is invalid')
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* zEmail({ message: 'Email is invalid' })
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* ```
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*/
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export const zEmail = (options?: string | { message?: string }) => {
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const message =
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typeof options === 'string' ? options : (options?.message ?? DEFAULT_EMAIL_MESSAGE);
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return z.string().regex(EMAIL_REGEX, { message });
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};
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