102 lines
2.6 KiB
PHP
102 lines
2.6 KiB
PHP
<?php
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namespace App\Services\Drift;
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class DriftHasher
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{
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/**
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* @param array<int, string> $volatileKeys
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*/
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public function hashNormalized(mixed $value, array $volatileKeys = [
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'@odata.context',
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'@odata.etag',
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'createdDateTime',
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'lastModifiedDateTime',
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'modifiedDateTime',
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'createdAt',
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'updatedAt',
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]): string
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{
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$normalized = $this->normalizeValue($value, $volatileKeys);
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return hash('sha256', json_encode($normalized, JSON_UNESCAPED_SLASHES | JSON_UNESCAPED_UNICODE));
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}
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public function fingerprint(
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int $tenantId,
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string $scopeKey,
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string $subjectType,
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string $subjectExternalId,
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string $changeType,
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string $baselineHash,
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string $currentHash,
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): string {
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$parts = [
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(string) $tenantId,
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$this->normalize($scopeKey),
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$this->normalize($subjectType),
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$this->normalize($subjectExternalId),
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$this->normalize($changeType),
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$this->normalize($baselineHash),
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$this->normalize($currentHash),
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];
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return hash('sha256', implode('|', $parts));
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}
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private function normalize(string $value): string
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{
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return trim(mb_strtolower($value));
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}
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/**
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* @param array<int, string> $volatileKeys
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*/
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private function normalizeValue(mixed $value, array $volatileKeys): mixed
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{
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if (is_array($value)) {
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if ($this->isList($value)) {
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$items = array_map(fn ($item) => $this->normalizeValue($item, $volatileKeys), $value);
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usort($items, function ($a, $b): int {
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return strcmp(
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json_encode($a, JSON_UNESCAPED_SLASHES | JSON_UNESCAPED_UNICODE),
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json_encode($b, JSON_UNESCAPED_SLASHES | JSON_UNESCAPED_UNICODE)
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);
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});
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return $items;
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}
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$result = [];
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foreach ($value as $key => $item) {
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if (is_string($key) && in_array($key, $volatileKeys, true)) {
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continue;
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}
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$result[$key] = $this->normalizeValue($item, $volatileKeys);
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}
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ksort($result);
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return $result;
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}
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if (is_string($value)) {
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return trim($value);
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}
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return $value;
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}
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private function isList(array $value): bool
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{
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if ($value === []) {
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return true;
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}
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return array_keys($value) === range(0, count($value) - 1);
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}
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}
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