<?php
/**
 * Shortcodes under the names they had before 0.2.36.
 *
 * @package AiRankSuite
 */

declare(strict_types=1);

namespace AiRankSuite\Support;

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

/**
 * Options and tables can be renamed by a migration; a shortcode somebody typed
 * into a page three months ago cannot, not safely — it sits in post content,
 * in widgets, in page-builder JSON and in theme templates, and a search and
 * replace across all of that is a bigger risk than the thing it fixes. So the
 * old tags keep working: whatever is registered under the current prefix is
 * answered under the former one as well, by the same callback. Derived from
 * the registry rather than listed, so a shortcode added later is covered
 * without anybody remembering this file.
 */
final class LegacyShortcodes {

	private const CURRENT = 'airanksuite_';
	private const FORMER  = 'airs_';

	/** Register the hook. Idempotent. */
	public static function boot(): void {
		static $done = false;
		if ( $done ) {
			return;
		}
		$done = true;
		// Late on init: every module has registered its own by then.
		add_action( 'init', array( self::class, 'alias' ), 99 );
	}

	/** Answer each current tag under its former name too. */
	public static function alias(): void {
		global $shortcode_tags;
		foreach ( (array) $shortcode_tags as $tag => $callback ) {
			if ( ! is_string( $tag ) || 0 !== strpos( $tag, self::CURRENT ) ) {
				continue;
			}
			$former = self::FORMER . substr( $tag, strlen( self::CURRENT ) );
			if ( ! shortcode_exists( $former ) ) {
				add_shortcode( $former, $callback );
			}
		}
	}
}