59 lines
2.3 KiB
PHP
59 lines
2.3 KiB
PHP
<?php
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declare(strict_types=1);
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namespace app\adminapi\service;
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use app\common\service\NihaixiaClinicalSkill;
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use app\common\service\TcmAncientBooksReference;
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use think\facade\Cache;
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/** Short-lived evidence only. The caller must re-authorize and aggregate before lookup. */
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final class AiContextCompactionCache
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{
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public static function remember(string $scope, string $profile, string $source, callable $produce): array
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{
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$config = config('prescription_ai') ?: [];
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$ttl = max(0, min(600, (int) ($config['context_compaction_cache_ttl'] ?? 300)));
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$key = self::key($scope, $profile, $source, $config);
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if ($scope !== '' && $ttl > 0) {
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try {
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$cached = Cache::get($key);
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if (self::valid($cached, strlen($source))) {
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$cached['cache_hit'] = true;
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return $cached;
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}
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} catch (\Throwable $ignored) {
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// An unavailable cache must not prevent a complete fresh analysis.
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}
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}
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$result = $produce();
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if ($scope !== '' && $ttl > 0 && self::valid($result, strlen($source))) {
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try {
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Cache::set($key, $result, $ttl);
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} catch (\Throwable $ignored) {
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}
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}
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return $result + ['cache_hit' => false];
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}
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private static function key(string $scope, string $profile, string $source, array $config): string
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{
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return 'ai-context-evidence:' . hash('sha256', serialize([
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'evidence-extraction-v2', $scope, $profile, hash('sha256', $source),
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$config['base_url'] ?? '', $config['models'][$profile] ?? [],
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NihaixiaClinicalSkill::VERSION, TcmAncientBooksReference::COMMIT,
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]));
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}
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private static function valid($value, int $sourceBytes): bool
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{
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return is_array($value) && is_string($value['text'] ?? null)
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&& trim($value['text']) !== '' && strlen($value['text']) <= 240000
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&& ($value['source_bytes'] ?? null) === $sourceBytes
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&& is_int($value['chunk_count'] ?? null) && $value['chunk_count'] > 0
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&& is_int($value['reduction_rounds'] ?? null) && $value['reduction_rounds'] >= 0
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&& ($value['compacted'] ?? null) === true;
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}
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}
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