<?php

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/**

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* DiscountsUtil class file.

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*/

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namespace Automattic\WooCommerce\Utilities;

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/**

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* The DiscountsUtil class provides utilities to assist discounts calculation and validation.

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*/

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class DiscountsUtil {

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/**

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* Checks if the given email address(es) matches the ones specified on the coupon.

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*

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* @param array $check_emails Array of customer email addresses.

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* @param array $restrictions Array of allowed email addresses.

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*

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* @return bool

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*/

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public static function is_coupon_emails_allowed( $check_emails, $restrictions ) {

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foreach ( $check_emails as $check_email ) {

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// With a direct match we return true.

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if ( in_array( $check_email, $restrictions, true ) ) {

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return true;

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}

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// Go through the allowed emails and return true if the email matches a wildcard.

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foreach ( $restrictions as $restriction ) {

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// Convert to PHP-regex syntax.

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$regex = '/^' . str_replace( '*', '(.+)?', $restriction ) . '$/';

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preg_match( $regex, $check_email, $match );

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if ( ! empty( $match ) ) {

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return true;

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}

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}

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}

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// No matches, this one isn't allowed.

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return false;

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}

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}

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