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Edit File: multilingual.php

<?php

// @phpcs:disable Yoast.NamingConventions.NamespaceName.TooLong -- This namespace should reflect the namespace of the original class.
namespace Yoast\WP\SEO\Editors\Framework\Integrations;

use Yoast\WP\SEO\Conditionals\Third_Party\Polylang_Conditional;
use Yoast\WP\SEO\Conditionals\Third_Party\TranslatePress_Conditional;
use Yoast\WP\SEO\Conditionals\Third_Party\WPML_Conditional;
use Yoast\WP\SEO\Editors\Domain\Integrations\Integration_Data_Provider_Interface;

/**
 * Describes if the Multilingual integration is enabled.
 */
class Multilingual implements Integration_Data_Provider_Interface {

/**
	 * The WPML conditional.
	 *
	 * @var WPML_Conditional
	 */
	private $wpml_conditional;

/**
	 * The Polylang conditional.
	 *
	 * @var Polylang_Conditional
	 */
	private $polylang_conditional;

/**
	 * The TranslatePress conditional.
	 *
	 * @var TranslatePress_Conditional
	 */
	private $translate_press_conditional;

/**
	 * The constructor.
	 *
	 * @param WPML_Conditional           $wpml_conditional            The wpml conditional.
	 * @param Polylang_Conditional       $polylang_conditional        The polylang conditional.
	 * @param TranslatePress_Conditional $translate_press_conditional The translate press conditional.
	 */
	public function __construct( WPML_Conditional $wpml_conditional, Polylang_Conditional $polylang_conditional, TranslatePress_Conditional $translate_press_conditional ) {
		$this->wpml_conditional            = $wpml_conditional;
		$this->polylang_conditional        = $polylang_conditional;
		$this->translate_press_conditional = $translate_press_conditional;
	}

/**
	 * If the integration is activated.
	 *
	 * @return bool If the integration is activated.
	 */
	public function is_enabled(): bool {
		return $this->multilingual_plugin_active();
	}

/**
	 * Return this object represented by a key value array.
	 *
	 * @return array<string, bool> Returns the name and if the feature is enabled.
	 */
	public function to_array(): array {
		return [ 'isMultilingualActive' => $this->is_enabled() ];
	}

/**
	 * Returns this object represented by a key value structure that is compliant with the script data array.
	 *
	 * @return array<string, bool> Returns the legacy key and if the feature is enabled.
	 */
	public function to_legacy_array(): array {
		return [ 'multilingualPluginActive' => $this->is_enabled() ];
	}

/**
	 * Checks whether a multilingual plugin is currently active. Currently, we only check the following plugins:
	 * WPML, Polylang, and TranslatePress.
	 *
	 * @return bool Whether a multilingual plugin is currently active.
	 */
	private function multilingual_plugin_active() {
		$wpml_active           = $this->wpml_conditional->is_met();
		$polylang_active       = $this->polylang_conditional->is_met();
		$translatepress_active = $this->translate_press_conditional->is_met();

return ( $wpml_active || $polylang_active || $translatepress_active );
	}
}

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