UserEmailLocal.php
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UserEmailLocal.php
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	<?php

	namespace App\Rules;

	use Illuminate\Contracts\Validation\Rule;
	use Illuminate\Support\Facades\Validator;

	class UserEmailLocal implements Rule
	{
	private $message;
	private $external;

	/**
	* Class constructor.
	*
	* @param bool $external The user in an external domain, or not
	*/
	public function __construct(bool $external)
	{
	$this->external = $external;
	}

	/**
	* Determine if the validation rule passes.
	*
	* Validation of local part of an email address that's
	* going to be user's login.
	*
	* @param string $attribute Attribute name
	* @param mixed $login Local part of email address
	*
	* @return bool
	*/
	public function passes($attribute, $login): bool
	{
	// Strict validation
	if (!preg_match('/^[A-Za-z0-9_.-]+$/', $login)) {
	$this->message = \trans('validation.entryinvalid', ['attribute' => $attribute]);
	return false;
	}

	// Standard email address validation
	$v = Validator::make([$attribute => $login . '@test.com'], [$attribute => 'required\|email']);
	if ($v->fails()) {
	$this->message = \trans('validation.entryinvalid', ['attribute' => $attribute]);
	return false;
	}

	// Check if the local part is not one of exceptions
	// (when signing up for an account in public domain
	if (!$this->external) {
	$exceptions = '/^(admin\|administrator\|sales\|root)$/i';

	if (preg_match($exceptions, $login)) {
	$this->message = \trans('validation.entryexists', ['attribute' => $attribute]);
	return false;
	}
	}

	return true;
	}

	/**
	* Get the validation error message.
	*
	* @return string
	*/
	public function message(): ?string
	{
	return $this->message;
	}
	}