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Edit File: metabox.php

<?php

namespace Yoast\WP\Duplicate_Post\UI;

use WP_Post;
use Yoast\WP\Duplicate_Post\Permissions_Helper;
use Yoast\WP\Duplicate_Post\Utils;

/**
 * Duplicate Post class to manage the metabox.
 */
class Metabox {

/**
	 * Holds the permissions helper.
	 *
	 * @var Permissions_Helper
	 */
	protected $permissions_helper;

/**
	 * Initializes the class.
	 *
	 * @param Permissions_Helper $permissions_helper The permissions helper.
	 */
	public function __construct( Permissions_Helper $permissions_helper ) {
		$this->permissions_helper = $permissions_helper;
	}

/**
	 * Adds hooks to integrate with WordPress.
	 *
	 * @return void
	 */
	public function register_hooks() {
		if ( \intval( \get_option( 'duplicate_post_show_original_meta_box' ) ) === 1 ) {
			\add_action( 'add_meta_boxes', [ $this, 'add_custom_metabox' ], 10, 2 );
		}
	}

/**
	 * Adds a metabox to Edit screen.
	 *
	 * @param string  $post_type The post type.
	 * @param WP_Post $post      The current post object.
	 *
	 * @return void
	 */
	public function add_custom_metabox( $post_type, $post ) {
		$enabled_post_types = $this->permissions_helper->get_enabled_post_types();

if ( \in_array( $post_type, $enabled_post_types, true )
			&& $post instanceof WP_Post ) {
			$original_item = Utils::get_original( $post );

if ( $original_item instanceof WP_Post ) {
				\add_meta_box(
					'duplicate_post_show_original',
					\__( 'Duplicate Post', 'duplicate-post' ),
					[ $this, 'custom_metabox_html' ],
					$post_type,
					'side',
					'default',
					[ 'original' => $original_item ]
				);
			}
		}
	}

/**
	 * Outputs the HTML for the metabox.
	 *
	 * @param WP_Post $post The current post.
	 * @param array $metabox The array containing the metabox data.
	 *
	 * @return void
	 */
	public function custom_metabox_html( $post, $metabox ) {
		$original_item = $metabox['args']['original'];
		if ( ! $this->permissions_helper->is_rewrite_and_republish_copy( $post ) ) {
			?>
		
			<input type="checkbox"
				name="duplicate_post_remove_original"
				id="duplicate-post-remove-original"
				value="duplicate_post_remove_original"
				aria-describedby="duplicate-post-remove-original-description">
			<label for="duplicate-post-remove-original">
				<?php \esc_html_e( 'Delete reference to original item.', 'duplicate-post' ); ?>
			</label>
		
			<?php
		}
		?>
		
			<?php
			\printf(
				\wp_kses(
					/* translators: %s: post title */
					\__(
						'The original item this was copied from is: %s',
						'duplicate-post'
					),
					[
						'span' => [
							'class' => [],
						],
					]
				),
				Utils::get_edit_or_view_link( $original_item ) // phpcs:ignore WordPress.Security.EscapeOutput
			);
			?>
		
		<?php
	}
}

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