<?php
/**
 * Registered shortcodes are code, not text: [contact-form-7 id="1" title="Contact"]
 * must reach the page exactly as written. Matches each opening and closing
 * tag on its own, so an enclosing shortcode around HTML is handled too.
 * Brackets that are not a registered shortcode ("[Read more]") stay text.
 */

declare( strict_types = 1 );

namespace AddBlack\Lang\MachineTranslation;

defined( 'ABSPATH' ) || exit;

final class Shortcodes {

	/** @return string[] Registered shortcode tags. */
	public static function tags(): array {
		global $shortcode_tags;
		return array_map( 'strval', array_keys( (array) $shortcode_tags ) );
	}

	/** Regex body (no delimiters, "/" escaped) for one shortcode tag, or '' when none are registered. */
	public static function pattern(): string {
		$tags = self::tags();
		if ( ! $tags ) {
			return '';
		}
		$names = implode( '|', array_map( static fn( string $t ): string => preg_quote( $t, '/' ), $tags ) );
		return '\\[\\/?(?:' . $names . ')(?![\\w-])[^\\[\\]]*\\]';
	}

	/** The text without registered shortcode tags. */
	public static function strip( string $text ): string {
		$pattern = self::pattern();
		return '' === $pattern || ! str_contains( $text, '[' ) ? $text : (string) preg_replace( '/' . $pattern . '/u', '', $text );
	}
}