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1 |
1 | <?php |
2 | |
3 | declare(strict_types=1); |
4 | |
5 | /** |
6 | * This file is part of php-fast-forward/http-message. |
7 | * |
8 | * This source file is subject to the license bundled |
9 | * with this source code in the file LICENSE. |
10 | * |
11 | * @link https://github.com/php-fast-forward/http-message |
12 | * @copyright Copyright (c) 2025 Felipe Sayão Lobato Abreu <github@mentordosnerds.com> |
13 | * @license https://opensource.org/licenses/MIT MIT License |
14 | */ |
15 | |
16 | namespace FastForward\Http\Message; |
17 | |
18 | use Nyholm\Psr7\Response; |
19 | |
20 | /** |
21 | * Class JsonResponse. |
22 | * |
23 | * Provides a JSON-specific HTTP response implementation that complies with PSR-7 Response interfaces. |
24 | * This class MUST be used when returning JSON payloads over HTTP responses. |
25 | * It automatically sets the 'Content-Type' header to 'application/json' with the specified charset. |
26 | * |
27 | * @method PayloadStreamInterface getBody() Retrieves the response body as a JSON stream. |
28 | */ |
29 | final class JsonResponse extends Response implements PayloadResponseInterface |
30 | { |
31 | /** |
32 | * Constructs a new JsonResponse instance with an optional payload and charset. |
33 | * |
34 | * This constructor SHALL initialize the response body with a JsonStream containing the provided payload. |
35 | * The 'Content-Type' header MUST be set to 'application/json' with the specified charset. |
36 | * |
37 | * @param mixed $payload The JSON-serializable payload to send in the response body. Defaults to an empty array. |
38 | * @param string $charset The character encoding to use in the 'Content-Type' header. Defaults to 'utf-8'. |
39 | */ |
40 | public function __construct( |
41 | mixed $payload = [], |
42 | string $charset = 'utf-8' |
43 | ) { |
44 | parent::__construct( |
45 | headers: ['Content-Type' => 'application/json; charset=' . $charset], |
46 | body: new JsonStream($payload), |
47 | ); |
48 | } |
49 | |
50 | /** |
51 | * Retrieves the payload contained in the response body. |
52 | * |
53 | * This method MUST return the same payload provided during construction or via withPayload(). |
54 | * |
55 | * @return mixed the decoded JSON payload |
56 | */ |
57 | public function getPayload(): mixed |
58 | { |
59 | return $this->getBody()->getPayload(); |
60 | } |
61 | |
62 | /** |
63 | * Returns an instance with the specified payload. |
64 | * |
65 | * This method SHALL return a new instance of the response with the body replaced by a new JsonStream |
66 | * containing the provided payload. The original instance MUST remain unchanged, ensuring immutability |
67 | * as required by PSR-7. |
68 | * |
69 | * @param mixed $payload the new JSON-serializable payload |
70 | * |
71 | * @return self a new JsonResponse instance with the updated payload |
72 | */ |
73 | public function withPayload(mixed $payload): self |
74 | { |
75 | return $this->withBody($this->getBody()->withPayload($payload)); |
76 | } |
77 | } |