<?php

/**
 * Encode/Decode helper functions.
 *
 * Mirrors packages/blocks/utils/encode-decode/index.js and
 * packages/library/src/utils/encode-decode/index.php (same encode/decode
 * scheme, used client-side by edit.tsx/save.js and server-side by
 * render.php to round-trip the `styleCustom` block attribute).
 *
 * Lives in includes/ (rather than being required directly from
 * packages/blocks/utils/) because that packages/ tree is monorepo build
 * source — plugin deployments that only ship the built plugin (a
 * WordPress.org release zip, a stripped production deploy, etc.) aren't
 * guaranteed to include it, which would fatal-error on activation.
 *
 * @package wpxero
 */

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

if (! function_exists('wpxero_encode')) {
	/**
	 * Encode string.
	 *
	 * @param string|array $str - string to encode.
	 *
	 * @return string|array
	 */
	function wpxero_encode($str) {
		// Array.
		if (is_array($str)) {
			$result = array();

			foreach ($str as $k => $val) {
				$result[wpxero_encode($k)] = wpxero_encode($val);
			}

			return $result;
		}

		// String.
		if (is_string($str)) {
			// Because of these replacements, some attributes can't be exported to XML without being broken. So, we need to replace it manually with something safe.
			// https://github.com/WordPress/gutenberg/blob/88645e4b268acf5746e914159e3ce790dcb1665a/packages/blocks/src/api/serializer.js#L246-L271 .
			$str = str_replace('--', '_u002d__u002d_', $str);

			// phpcs:ignore
			$str = rawurlencode($str);
		}

		return $str;
	}
}

if (! function_exists('wpxero_decode')) {
	/**
	 * Decode string.
	 *
	 * @param string|array $str - string to decode.
	 *
	 * @return string|array
	 */
	function wpxero_decode($str) {
		// Array.
		if (is_array($str)) {
			$result = array();

			foreach ($str as $k => $val) {
				$result[wpxero_decode($k)] = wpxero_decode($val);
			}

			return $result;
		}

		// String.
		if (is_string($str)) {
			// Previously we used urldecode() function, but it doesn't work properly with `+` character.
			// For example, there styles will be broken: width: calc( 100% + 20px );.
			$str = rawurldecode($str);

			// Because of these replacements, some attributes can't be exported to XML without being broken. So, we need to replace it manually with something safe.
			// https://github.com/WordPress/gutenberg/blob/88645e4b268acf5746e914159e3ce790dcb1665a/packages/blocks/src/api/serializer.js#L246-L271 .
			$str = str_replace('_u002d__u002d_', '--', $str);
		}

		return $str;
	}
}