Function validateEmail

worker/utils/validationUtils.ts:31–69

(
	email: string,
	config: EmailValidationConfig = DEFAULT_EMAIL_CONFIG,
)

 * Comprehensive email validation
 */
export function validateEmail(
	email: string,
	config: EmailValidationConfig = DEFAULT_EMAIL_CONFIG,
): { valid: boolean; error?: string } {
	if (!email || typeof email !== 'string') {
		return { valid: false, error: 'Email is required' };
	}

	// Length check
	const maxLength = config.maxLength || DEFAULT_EMAIL_CONFIG.maxLength!;
	if (email.length > maxLength) {
		return {
			valid: false,
			error: `Email must be less than ${maxLength} characters`,
		};
	}

	// Basic format validation
	const emailRegex = config.allowInternational
		? /^[^\s@]+@[^\s@]+\.[^\s@]+$/ // Basic international-friendly regex
		: /^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}$/; // ASCII only

	if (!emailRegex.test(email)) {
		return { valid: false, error: 'Invalid email format' };
	}

	// Domain validation
	const domain = email.split('@')[1]?.toLowerCase();
	if (config.blockedDomains?.includes(domain)) {
		return { valid: false, error: 'Email domain is not allowed' };
	}

	// Plus addressing check (if disabled)
	if (!config.allowPlusAddressing && email.includes('+')) {
		return { valid: false, error: 'Plus addressing is not allowed' };
	}

	return { valid: true };
}

/**
 * Zod schema for password validation