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<?php
namespace WP_Rocket\Traits;
/**
* Statically store values.
*
* @since 3.3
*/
trait Memoize {
/**
* Store the values.
*
* @var array
* @since 3.3
*/
private static $memoized = [];
/**
* Tell if a value is memoized.
*
* @since 3.3
*
* @param string $method Name of the method.
* @param array $args Arguments passed to the parent method. It is used to build a hash.
* @return bool
*/
final public static function is_memoized( $method, $args = [] ) {
$hash = self::get_memoize_args_hash( $args );
return isset( self::$memoized[ $method ][ $hash ] );
}
/**
* Get a stored value.
*
* @since 3.3
*
* @param string $method Name of the method.
* @param array $args Arguments passed to the parent method. It is used to build a hash.
* @return mixed
*/
final public static function get_memoized( $method, $args = [] ) {
$hash = self::get_memoize_args_hash( $args );
return isset( self::$memoized[ $method ][ $hash ] ) ? self::$memoized[ $method ][ $hash ] : null;
}
/**
* Cache a value.
*
* @since 3.3
*
* @param string $method Name of the method.
* @param array $args Arguments passed to the parent method. It is used to build a hash.
* @param mixed $value Value to store.
* @return mixed The stored value.
*/
final public static function memoize( $method, $args = [], $value = null ) {
$hash = self::get_memoize_args_hash( $args );
if ( ! isset( self::$memoized[ $method ] ) ) {
self::$memoized[ $method ] = [];
}
self::$memoized[ $method ][ $hash ] = $value;
return self::$memoized[ $method ][ $hash ]; //phpcs:ignore Universal.CodeAnalysis.ConstructorDestructorReturn.ReturnValueFound
}
/**
* Create a hash based on an array of arguments.
*
* @since 3.3
*
* @param array $args An array of arguments.
* @return string
*/
private static function get_memoize_args_hash( $args ) {
if ( [] === $args ) {
return 'd751713988987e9331980363e24189ce'; // `md5( json_encode( [] ) )`
}
return md5( call_user_func( 'json_encode', $args ) );
}
}
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