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| 1 | <?php |
| 2 | |
| 3 | declare(strict_types=1); |
| 4 | |
| 5 | namespace LambdaTwelve\OneRecord\JsonLd; |
| 6 | |
| 7 | use JsonException; |
| 8 | |
| 9 | /** |
| 10 | * JSON decoding and encoding with the settings every ONE Record body needs: |
| 11 | * objects as associative arrays, big integers kept exact, UTF-8 and slashes |
| 12 | * left readable on output, and a depth bound so a hostile body cannot |
| 13 | * exhaust the stack. |
| 14 | */ |
| 15 | final class Json |
| 16 | { |
| 17 | public const int MAX_DEPTH = 64; |
| 18 | |
| 19 | private function __construct() {} |
| 20 | |
| 21 | /** |
| 22 | * @return array<string, mixed> |
| 23 | */ |
| 24 | public static function decodeObject(string $json): array |
| 25 | { |
| 26 | try { |
| 27 | $decoded = json_decode($json, true, self::MAX_DEPTH, JSON_THROW_ON_ERROR | JSON_BIGINT_AS_STRING); |
| 28 | } catch (JsonException $e) { |
| 29 | throw JsonLdException::invalidJson($e->getMessage()); |
| 30 | } |
| 31 | if (!\is_array($decoded) || array_is_list($decoded)) { |
| 32 | throw JsonLdException::at('', 'A JSON-LD document must be a single JSON object'); |
| 33 | } |
| 34 | |
| 35 | /** @var array<string, mixed> $decoded */ |
| 36 | return $decoded; |
| 37 | } |
| 38 | |
| 39 | /** |
| 40 | * @param array<string, mixed> $document |
| 41 | */ |
| 42 | public static function encode(array $document, bool $pretty = true): string |
| 43 | { |
| 44 | $flags = JSON_THROW_ON_ERROR | JSON_UNESCAPED_SLASHES | JSON_UNESCAPED_UNICODE | JSON_PRESERVE_ZERO_FRACTION; |
| 45 | if ($pretty) { |
| 46 | $flags |= JSON_PRETTY_PRINT; |
| 47 | } |
| 48 | |
| 49 | return json_encode($document, $flags, self::MAX_DEPTH); |
| 50 | } |
| 51 | } |