work with Custom Permalink plugin to make oasis revision compatible

/**
 * Duplicate custom permalink structure from original post to its revision post.
 *
 * @param int   $new_post_id The ID of the new revision post.
 * @param WP_Post $post The original post object.
 *
 * @since 3.2.0
 */
function owf_handle_custom_permalink_on_duplicate( $new_post_id, $post ) {
	// Check if the post exists and is not an attachment
	if ( ! $post || ! isset( $post->ID ) || $post->post_type == 'attachment' ) {
		return;
	}

	// check if post is a revision
	$original_post_id = get_post_meta( $new_post_id, '_oasis_original', true );
	if ( empty( $original_post_id ) ) { // we are dealing with a original post
		return;
	}

	// Duplicate the custom permalink structure
	$custom_permalinks = get_post_meta( $post->ID, 'custom_permalink', false );
	$older_permalink = ! empty( $custom_permalinks ) && is_array( $custom_permalinks ) ? $custom_permalinks[0] : $custom_permalinks;

	$prefix          = '';
	$suffix          = '';
	$new_post_author = '';
	if ( $post->post_type != 'attachment' ) {
		$prefix = get_option( 'oasiswf_doc_revision_title_prefix' );
		$suffix = get_option( 'oasiswf_doc_revision_title_suffix' );
		if ( ! empty( $prefix ) ) {
			$prefix .= " ";
		}
		if ( ! empty( $suffix ) ) {
			$suffix = " " . $suffix;
		}
	}

	$old_slug = basename( untrailingslashit( $post->post_name ) );
	$new_slug = sanitize_title( $prefix . $post->post_title . $suffix );

	if ( $older_permalink ) {
		// Replace old slug with new one in the original custom permalink
		$new_permalink = str_replace( $old_slug, $new_slug, $older_permalink );
	} else {
		// Build permalink from post hierarchy (fallback)
		$ancestors = get_post_ancestors( $post );
		$ancestors = array_reverse( $ancestors );
		$parts = [];

		foreach ( $ancestors as $ancestor_id ) {
			$parts[] = get_post_field( 'post_name', $ancestor_id );
		}
		$parts[] = $new_slug;

		$new_permalink = implode( '/', $parts );
	}

	// delete old custom permalink meta
	delete_post_meta( $new_post_id, 'custom_permalink' );
	// Save it to new post
	update_post_meta( $new_post_id, 'custom_permalink', $new_permalink );
	update_post_meta( $new_post_id, 'original_custom_permalink', $custom_permalinks );
}
add_action( 'owf_duplicate_page', 'owf_handle_custom_permalink_on_duplicate', 50, 2 );
add_action( 'owf_duplicate_post', 'owf_handle_custom_permalink_on_duplicate', 50, 2 );

/**
 * Action hook function for `owf_revision_workflow_complete` action hook.
 *
 * Purpose is to update the custom permalink for the original post when the revision is merged.
 *
 * It first deletes the custom permalink meta for the original post because when it merges the revision, it will added revision custom permalink value in "custom_permalink" meta
 * so we need to delete it first.
 *
 * Then it updates the custom permalink for the original post.
 *
 * @param int $post_id The ID of the post that has just been merged.
 *
 * @since 1.0.0
 */
function owf_revision_workflow_complete_cb( $post_id ) {
	$original_post_id = get_post_meta( $post_id, '_oasis_original', true );

	// If the original post ID is not empty, we can proceed to update the custom permalink
	if ( ! empty( $original_post_id ) ) {
		// get original post meta "custom_permalink"
		$original_custom_permalink = get_post_meta( $post_id, 'original_custom_permalink', true );

		// now update "custom_permalink" meta for the revision post
		if ( ! empty( $original_custom_permalink ) ) {
			// first delete custom permalink meta from the original post because when it merges the revision, it will added revision custom permalink value in "custom_permalink" meta
			// so we need to delete it first
			delete_post_meta( $original_post_id, 'custom_permalink' );

			// skip adding original_custom_permalink to the original post, so delete it, because it's already added when revision merged.
			delete_post_meta( $original_post_id, 'original_custom_permalink' );

			// update the custom permalink for the original post
			// this is needed because when the revision is merged, it will update the custom permalink for the original post
			if( ! empty( $original_custom_permalink ) && is_array( $original_custom_permalink ) ) {
				foreach ( $original_custom_permalink as $permalink ) {
					// update the custom permalink for the original post
					add_post_meta( $original_post_id, 'custom_permalink', $permalink );
				}
			} elseif ( ! empty( $original_custom_permalink ) && ! is_array( $original_custom_permalink ) ) {
				// if it's not an array, just update the custom permalink for the original post
				add_post_meta( $original_post_id, 'custom_permalink', $original_custom_permalink );
			}
		}
	}
}
add_action('owf_revision_workflow_complete', 'owf_revision_workflow_complete_cb', 20, 1);