66 lines
1.5 KiB
PHP
66 lines
1.5 KiB
PHP
<?php
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/**
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* Helper class for segmenting large cache values without relying on serializing classes
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*
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* @since 1.34
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*/
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class SerializedValueContainer {
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private const SCHEMA = '__svc_schema__';
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private const SCHEMA_UNIFIED = 'DAAIDgoKAQw'; // 64 bit UID
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private const SCHEMA_SEGMENTED = 'CAYCDAgCDw4'; // 64 bit UID
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public const UNIFIED_DATA = '__data__';
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public const SEGMENTED_HASHES = '__hashes__';
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/**
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* @param string $serialized
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* @return stdClass
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*/
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public static function newUnified( $serialized ) {
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return (object)[
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self::SCHEMA => self::SCHEMA_UNIFIED,
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self::UNIFIED_DATA => $serialized
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];
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}
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/**
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* @param string[] $segmentHashList Ordered list of hashes for each segment
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* @return stdClass
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*/
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public static function newSegmented( array $segmentHashList ) {
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return (object)[
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self::SCHEMA => self::SCHEMA_SEGMENTED,
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self::SEGMENTED_HASHES => $segmentHashList
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];
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}
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/**
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* @param mixed $value
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* @return bool
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*/
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public static function isUnified( $value ) {
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return self::instanceOf( $value, self::SCHEMA_UNIFIED );
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}
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/**
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* @param mixed $value
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* @return bool
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*/
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public static function isSegmented( $value ) {
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return self::instanceOf( $value, self::SCHEMA_SEGMENTED );
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}
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/**
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* @param mixed $value
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* @param string $schema SCHEMA_* class constant
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* @return bool
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*/
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private static function instanceOf( $value, $schema ) {
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return (
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$value instanceof stdClass &&
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property_exists( $value, self::SCHEMA ) &&
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$value->{self::SCHEMA} === $schema
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);
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}
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}
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