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Edit File: Filters.php

<?php declare(strict_types = 1);

namespace MailPoet\Automation\Engine\Data;

if (!defined('ABSPATH')) exit;

class Filters {
  public const OPERATOR_AND = 'and';
  public const OPERATOR_OR = 'or';

/** @var string */
  private $operator;

/** @var FilterGroup[] */
  private $groups;

public function __construct(
    string $operator,
    array $groups
  ) {
    $this->operator = $operator;
    $this->groups = $groups;
  }

public function getOperator(): string {
    return $this->operator;
  }

public function getGroups(): array {
    return $this->groups;
  }

public function toArray(): array {
    return [
      'operator' => $this->operator,
      'groups' => array_map(function (FilterGroup $group): array {
        return $group->toArray();
      }, $this->groups),
    ];
  }

public static function fromArray(array $data): self {
    return new self(
      $data['operator'],
      array_map(function (array $group) {
        return FilterGroup::fromArray($group);
      }, $data['groups'])
    );
  }
}

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