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<?php |
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|
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declare (strict_types=1); |
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namespace WindPress\WindPress\Core\Scanner; |
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|
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use WIND_PRESS; |
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/** |
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* Reuses deterministic transformations of freshly read source inputs. |
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*/ |
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class ExtractionCache |
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{ |
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private const VERSION = 1; |
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private const TTL = 7 * 24 * 60 * 60; |
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private const MAX_ENTRY_BYTES = 2 * 1024 * 1024; |
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public static function remember(string $namespace, string $identity, array $inputs, callable $extract) |
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{ |
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$key = 'windpress_extract_' . hash('sha256', serialize([self::VERSION, WIND_PRESS::VERSION, get_current_blog_id(), get_current_user_id(), $namespace, $identity])); |
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$fingerprint = hash('sha256', serialize($inputs)); |
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$cached = get_transient($key); |
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if (is_array($cached) && ($cached['fingerprint'] ?? null) === $fingerprint && array_key_exists('result', $cached)) { |
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return $cached['result']; |
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} |
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$result = $extract(); |
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$entry = ['fingerprint' => $fingerprint, 'result' => $result]; |
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// Cache storage is optional; the freshly extracted source remains authoritative. |
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if (strlen(serialize($entry)) <= self::MAX_ENTRY_BYTES) { |
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set_transient($key, $entry, self::TTL); |
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} |
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return $result; |
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} |
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} |
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|
