<?php
/**
 * Class Google\Site_Kit\Core\Util\BC_Functions
 *
 * @package   Google\Site_Kit\Core\Util
 * @copyright 2021 Google LLC
 * @license   https://www.apache.org/licenses/LICENSE-2.0 Apache License 2.0
 * @link      https://sitekit.withgoogle.com
 */

namespace Google\Site_Kit\Core\Util;

use BadMethodCallException;

/**
 * Class for providing backwards compatible core functions, without polyfilling.
 *
 * @since 1.7.0
 * @access private
 * @ignore
 *
 * @method static void wp_print_script_tag( $attributes )
 * @method static void wp_print_inline_script_tag( $javascript, $attributes = array() )
 * @method static bool array_is_list( array $value )
 * @method static string wp_timezone_string()
 * @method static \DateTimeZone wp_timezone()
 */
class BC_Functions {

	/**
	 * Proxies calls to global functions, while falling back to the internal method by the same name.
	 *
	 * @since 1.7.0
	 *
	 * @param string $function_name Function name to call.
	 * @param array  $arguments     Arguments passed to function.
	 * @return mixed
	 * @throws BadMethodCallException Thrown if no method exists by the same name as the function.
	 */
	public static function __callStatic( $function_name, $arguments ) {
		if ( function_exists( $function_name ) ) {
			return call_user_func_array( $function_name, $arguments );
		}

		if ( method_exists( __CLASS__, $function_name ) ) {
			return self::{ $function_name }( ...$arguments );
		}

		throw new BadMethodCallException( "$function_name does not exist." );
	}

	/**
	 * Basic implementation of the wp_sanitize_script_attributes function introduced in the WordPress version 5.7.0.
	 *
	 * @since 1.41.0
	 *
	 * @param array $attributes Key-value pairs representing `<script>` tag attributes.
	 * @return string String made of sanitized `<script>` tag attributes.
	 */
	protected static function wp_sanitize_script_attributes( $attributes ) {
		$attributes_string = '';

		foreach ( $attributes as $attribute_name => $attribute_value ) {
			if ( is_bool( $attribute_value ) ) {
				if ( $attribute_value ) {
					$attributes_string .= ' ' . esc_attr( $attribute_name );
				}
			} else {
				$attributes_string .= sprintf( ' %1$s="%2$s"', esc_attr( $attribute_name ), esc_attr( $attribute_value ) );
			}
		}

		return $attributes_string;
	}

	/**
	 * A fallback for the wp_get_script_tag function introduced in the WordPress version 5.7.0.
	 *
	 * @since 1.41.0
	 *
	 * @param array $attributes Key-value pairs representing `<script>` tag attributes.
	 * @return string String containing `<script>` opening and closing tags.
	 */
	protected static function wp_get_script_tag( $attributes ) {
		return sprintf( "<script %s></script>\n", self::wp_sanitize_script_attributes( $attributes ) );
	}

	/**
	 * A fallback for the wp_print_script_tag function introduced in the WordPress version 5.7.0.
	 *
	 * @since 1.41.0
	 *
	 * @param array $attributes Key-value pairs representing `<script>` tag attributes.
	 */
	protected static function wp_print_script_tag( $attributes ) {
		echo self::wp_get_script_tag( $attributes ); // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped
	}

	/**
	 * A fallback for the wp_get_inline_script_tag function introduced in the WordPress version 5.7.0.
	 *
	 * @since 1.41.0
	 *
	 * @param string $javascript Inline JavaScript code.
	 * @param array  $attributes  Optional. Key-value pairs representing `<script>` tag attributes.
	 * @return string String containing inline JavaScript code wrapped around `<script>` tag.
	 */
	protected static function wp_get_inline_script_tag( $javascript, $attributes = array() ) {
		$javascript = "\n" . trim( $javascript, "\n\r " ) . "\n";
		return sprintf( "<script%s>%s</script>\n", self::wp_sanitize_script_attributes( $attributes ), $javascript );
	}

	/**
	 * A fallback for the wp_get_inline_script_tag function introduced in the WordPress version 5.7.0.
	 *
	 * @since 1.41.0
	 *
	 * @param string $javascript Inline JavaScript code.
	 * @param array  $attributes Optional. Key-value pairs representing `<script>` tag attributes.
	 */
	protected static function wp_print_inline_script_tag( $javascript, $attributes = array() ) {
		echo self::wp_get_inline_script_tag( $javascript, $attributes ); // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped
	}

	/**
	 * A fallback for the wp_get_sidebar function introduced in the WordPress version 5.9.0.
	 *
	 * Retrieves the registered sidebar with the given ID.
	 *
	 * @since 1.86.0
	 *
	 * @global array $wp_registered_sidebars The registered sidebars.
	 *
	 * @param string $id The sidebar ID.
	 * @return array|null The discovered sidebar, or null if it is not registered.
	 */
	protected static function wp_get_sidebar( $id ) {
		global $wp_registered_sidebars;

		foreach ( (array) $wp_registered_sidebars as $sidebar ) {
			if ( $sidebar['id'] === $id ) {
				return $sidebar;
			}
		}

		if ( 'wp_inactive_widgets' === $id ) {
			return array(
				'id'   => 'wp_inactive_widgets',
				'name' => __( 'Inactive widgets', 'default' ),
			);
		}

		return null;
	}

	/**
	 * A fallback for the wp_timezone_string function introduced in WordPress 5.3.0.
	 *
	 * @since 1.176.0
	 *
	 * @return string PHP timezone string or a ±HH:MM offset.
	 */
	protected static function wp_timezone_string() {
		$timezone_string = get_option( 'timezone_string' );

		if ( $timezone_string ) {
			return $timezone_string;
		}

		$offset  = (float) get_option( 'gmt_offset' );
		$hours   = (int) $offset;
		$minutes = ( $offset - $hours );

		$sign      = ( $offset < 0 ) ? '-' : '+';
		$abs_hour  = abs( $hours );
		$abs_mins  = abs( $minutes * 60 );
		$tz_offset = sprintf( '%s%02d:%02d', $sign, $abs_hour, $abs_mins );

		return $tz_offset;
	}

	/**
	 * A fallback for the wp_timezone function introduced in WordPress 5.3.0.
	 *
	 * @since 1.176.0
	 *
	 * @return \DateTimeZone Site timezone.
	 */
	protected static function wp_timezone() {
		return new \DateTimeZone( self::wp_timezone_string() );
	}

	/**
	 * A fallback for the array_is_list function introduced in PHP 8.1.
	 *
	 * @since 1.171.0
	 *
	 * @param array $value The array to check.
	 * @return bool True if the array is a list, false otherwise.
	 */
	protected static function array_is_list( array $value ) {
		if ( array() === $value ) {
			return true;
		}

		return array_keys( $value ) === range( 0, count( $value ) - 1 );
	}
}