post->ID );

		if ( ! $original_post ) {
			return;
		}

		$this->republish( $post, $original_post );

		// Trigger the redirect in the Classic Editor.
		if ( $this->is_classic_editor_post_request() ) {
			$this->redirect( $original_post->ID, $post->ID );
		}
	}

	/**
	 * Republishes the original post with the passed post, when using the Block Editor.
	 *
	 * @param WP_Post $post The copy's post object.
	 *
	 * @return void
	 */
	public function republish_after_rest_api_request( $post ) {
		$this->republish_request( $post );
	}

	/**
	 * Republishes the original post with the passed post, when using the Classic Editor.
	 *
	 * Runs also in the Block Editor to save the custom meta data only when there
	 * are custom meta boxes.
	 *
	 * @param int     $post_id The copy's post ID.
	 * @param WP_Post $post    The copy's post object.
	 *
	 * @return void
	 */
	public function republish_after_post_request( $post_id, $post ) {
		if ( $this->is_rest_request() ) {
			return;
		}

		$this->republish_request( $post );
	}

	/**
	 * Republishes the scheduled Rewrited and Republish post.
	 *
	 * @param WP_Post $copy The scheduled copy.
	 *
	 * @return void
	 */
	public function republish_scheduled_post( $copy ) {
		if ( ! $copy instanceof WP_Post || ! $this->permissions_helper->is_rewrite_and_republish_copy( $copy ) ) {
			return;
		}

		$original_post = Utils::get_original( $copy->ID );

		// If the original post was permanently deleted, we don't want to republish, so trash instead.
		if ( ! $original_post ) {
			$this->delete_copy( $copy->ID, null, false );

			return;
		}

		\kses_remove_filters();
		$this->republish( $copy, $original_post );
		\kses_init_filters();
		$this->delete_copy( $copy->ID, $original_post->ID );
	}

	/**
	 * Cleans up the copied post and temporary metadata after the user has been redirected.
	 *
	 * @return void
	 */
	public function clean_up_after_redirect() {
		if ( ! empty( $_GET['dprepublished'] ) && ! empty( $_GET['dpcopy'] ) && ! empty( $_GET['post'] ) ) {
			$copy_id = \intval( \wp_unslash( $_GET['dpcopy'] ) );
			$post_id = \intval( \wp_unslash( $_GET['post'] ) );

			\check_admin_referer( 'dp-republish', 'dpnonce' );

			if ( \intval( \get_post_meta( $copy_id, '_dp_has_been_republished', true ) ) === 1 ) {
				$this->delete_copy( $copy_id, $post_id );
			}
			else {
				\wp_die( \esc_html__( 'An error occurred while deleting the Rewrite & Republish copy.', 'duplicate-post' ) );
			}
		}
	}

	/**
	 * Checks whether a request is the Classic Editor POST request.
	 *
	 * @return bool Whether the request is the Classic Editor POST request.
	 */
	public function is_classic_editor_post_request() {
		if ( $this->is_rest_request() || \wp_doing_ajax() ) {
			return false;
		}

		return isset( $_GET['meta-box-loader'] ) === false;
	}

	/**
	 * Determines whether the current request is a REST request.
	 *
	 * @return bool Whether or not the request is a REST request.
	 */
	public function is_rest_request() {
		return \defined( 'REST_REQUEST' ) && \REST_REQUEST;
	}

	/**
	 * Republishes the post by overwriting the original post.
	 *
	 * @param WP_Post $post          The Rewrite & Republish copy.
	 * @param WP_Post $original_post The original post.
	 *
	 * @return void
	 */
	public function republish( WP_Post $post, WP_Post $original_post ) {
		// Remove WordPress default filter so a new revision is not created on republish.
		\remove_action( 'post_updated', 'wp_save_post_revision', 10 );

		// Republish taxonomies and meta.
		$this->republish_post_taxonomies( $post );
		$this->republish_post_meta( $post );

		// Republish the post.
		$this->republish_post_elements( $post, $original_post );

		// Mark the copy as already published.
		\update_post_meta( $post->ID, '_dp_has_been_republished', '1' );

		// Re-enable the creation of a new revision.
		\add_action( 'post_updated', 'wp_save_post_revision', 10, 1 );
	}

	/**
	 * Deletes the copy and associated post meta, if applicable.
	 *
	 * @param int      $copy_id            The copy's ID.
	 * @param int|null $post_id            The original post's ID. Optional.
	 * @param bool     $permanently_delete Whether to permanently delete the copy. Defaults to true.
	 *
	 * @return void
	 */
	public function delete_copy( $copy_id, $post_id = null, $permanently_delete = true ) {
		/**
		 * Fires before deleting a Rewrite & Republish copy.
		 *
		 * @param int $copy_id The copy's ID.
		 * @param int $post_id The original post's ID..
		 */
		\do_action( 'duplicate_post_after_rewriting', $copy_id, $post_id );

		// Delete the copy bypassing the trash so it also deletes the copy post meta.
		\wp_delete_post( $copy_id, $permanently_delete );

		if ( ! \is_null( $post_id ) ) {
			// Delete the meta that marks the original post has having a copy.
			\delete_post_meta( $post_id, '_dp_has_rewrite_republish_copy' );
		}
	}

	/**
	 * Republishes the post elements overwriting the original post.
	 *
	 * @param WP_Post $post          The post object.
	 * @param WP_Post $original_post The original post.
	 *
	 * @return void
	 */
	protected function republish_post_elements( $post, $original_post ) {
		// Cast to array and not alter the copy's original object.
		$post_to_be_rewritten = clone $post;

		// Prepare post data for republishing.
		$post_to_be_rewritten->ID          = $original_post->ID;
		$post_to_be_rewritten->post_name   = $original_post->post_name;
		$post_to_be_rewritten->post_status = $this->determine_post_status( $post, $original_post );

		/**
		 * Yoast SEO and other plugins prevent from accidentally updating another post's
		 * data (e.g. the Yoast SEO metadata by checking the $_POST data ID with the post object ID.
		 * We need to overwrite the $_POST data ID to allow updating the original post.
		 */
		$_POST['ID'] = $original_post->ID;

		// Republish the original post.
		$rewritten_post_id = \wp_update_post( $post_to_be_rewritten );

		if ( $rewritten_post_id === 0 ) {
			\wp_die( \esc_html__( 'An error occurred while republishing the post.', 'duplicate-post' ) );
		}
	}

	/**
	 * Republishes the post taxonomies overwriting the ones of the original post.
	 *
	 * @param WP_Post $post The copy's post object.
	 *
	 * @return void
	 */
	protected function republish_post_taxonomies( $post ) {
		$original_post_id = Utils::get_original_post_id( $post->ID );

		$copy_taxonomies_options = [
			'taxonomies_excludelist' => [],
			'use_filters'            => false,
			'copy_format'            => true,
		];
		$this->post_duplicator->copy_post_taxonomies( $original_post_id, $post, $copy_taxonomies_options );
	}

	/**
	 * Republishes the post meta overwriting the ones of the original post.
	 *
	 * @param WP_Post $post The copy's post object.
	 *
	 * @return void
	 */
	protected function republish_post_meta( $post ) {
		$original_post_id = Utils::get_original_post_id( $post->ID );

		$copy_meta_options = [
			'meta_excludelist' => Utils::get_default_filtered_meta_names(),
			'use_filters'      => false,
			'copy_thumbnail'   => true,
			'copy_template'    => true,
		];
		$this->post_duplicator->copy_post_meta_info( $original_post_id, $post, $copy_meta_options );
	}

	/**
	 * Redirects the user to the original post.
	 *
	 * @param int $original_post_id The ID of the original post to redirect to.
	 * @param int $copy_id          The ID of the copy post.
	 *
	 * @return void
	 */
	protected function redirect( $original_post_id, $copy_id ) {
		\wp_safe_redirect(
			\add_query_arg(
				[
					'dprepublished' => 1,
					'dpcopy'        => $copy_id,
					'dpnonce'       => \wp_create_nonce( 'dp-republish' ),
				],
				\admin_url( 'post.php?action=edit&post=' . $original_post_id )
			)
		);
		exit();
	}

	/**
	 * Determines the post status to use when publishing the Rewrite & Republish copy.
	 *
	 * @param WP_Post $post          The post object.
	 * @param WP_Post $original_post The original post object.
	 *
	 * @return string The post status to use.
	 */
	protected function determine_post_status( $post, $original_post ) {
		if ( $original_post->post_status === 'trash' ) {
			return 'trash';
		}

		if ( $post->post_status === 'private' ) {
			return 'private';
		}

		return 'publish';
	}

	/**
	 * Deletes the original post meta that flags it as having a copy when the copy is manually deleted.
	 *
	 * @param int $post_id Post ID of a post that is going to be deleted.
	 *
	 * @return void
	 */
	public function clean_up_when_copy_manually_deleted( $post_id ) {
		$post = \get_post( $post_id );

		if ( ! $this->permissions_helper->is_rewrite_and_republish_copy( $post ) ) {
			return;
		}

		$original_post_id = Utils::get_original_post_id( $post_id );
		\delete_post_meta( $original_post_id, '_dp_has_rewrite_republish_copy' );
	}
}