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https://github.com/nilportugues/php-jsend

JSend API transformer outputting valid (PSR-7) API Responses.
https://github.com/nilportugues/php-jsend

api jsend jsend-transformer json marshaller microservice microservices php php7 psr-7 serializer transformer

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JSend API transformer outputting valid (PSR-7) API Responses.

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# JSend API Transformer

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(https://insight.sensiolabs.com/projects/2ee8556c-d480-4f6f-a645-0ee18c271867)
[![Latest Stable Version](https://poser.pugx.org/nilportugues/jsend/v/stable)]
(https://packagist.org/packages/nilportugues/jsend)
[![Total Downloads](https://poser.pugx.org/nilportugues/jsend/downloads)]
(https://packagist.org/packages/nilportugues/jsend)
[![License](https://poser.pugx.org/nilportugues/jsend/license)](https://packagist.org/packages/nilportugues/jsend)
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## Installation

Use [Composer](https://getcomposer.org) to install the package:

```json
$ composer require nilportugues/jsend
```

## Usage
Given a PHP Object, and a series of mappings, the **JSend Transformer** will represent the given data as a JSON object.

For instance, given the following piece of code, defining a Blog Post and some comments:

```php
$post = new Post(
new PostId(9),
'Hello World',
'Your first post',
new User(
new UserId(1),
'Post Author'
),
[
new Comment(
new CommentId(1000),
'Have no fear, sers, your king is safe.',
new User(new UserId(2), 'Barristan Selmy'),
[
'created_at' => (new DateTime('2015/07/18 12:13:00'))->format('c'),
'accepted_at' => (new DateTime('2015/07/19 00:00:00'))->format('c'),
]
),
]
);
```

And a Mapping array for all the involved classes:

```php
use NilPortugues\Api\Mapping\Mapper;

$mappings = [
[
'class' => Post::class,
'alias' => 'Message',
'aliased_properties' => [
'author' => 'author',
'title' => 'headline',
'content' => 'body',
],
'hide_properties' => [

],
'id_properties' => [
'postId',
],
'urls' => [
'self' => 'http://example.com/posts/{postId}',
'comments' => 'http://example.com/posts/{postId}/comments'
],
],
[
'class' => PostId::class,
'alias' => '',
'aliased_properties' => [],
'hide_properties' => [],
'id_properties' => [
'postId',
],
'urls' => [
'self' => 'http://example.com/posts/{postId}',
],
],
[
'class' => User::class,
'alias' => '',
'aliased_properties' => [],
'hide_properties' => [],
'id_properties' => [
'userId',
],
'urls' => [
'self' => 'http://example.com/users/{userId}',
'friends' => 'http://example.com/users/{userId}/friends',
'comments' => 'http://example.com/users/{userId}/comments',
],
],
[
'class' => UserId::class,
'alias' => '',
'aliased_properties' => [],
'hide_properties' => [],
'id_properties' => [
'userId',
],
'urls' => [
'self' => 'http://example.com/users/{userId}',
'friends' => 'http://example.com/users/{userId}/friends',
'comments' => 'http://example.com/users/{userId}/comments',
],
],
[
'class' => Comment::class,
'alias' => '',
'aliased_properties' => [],
'hide_properties' => [],
'id_properties' => [
'commentId',
],
'urls' => [
'self' => 'http://example.com/comments/{commentId}',
],
],
[
'class' => CommentId::class,
'alias' => '',
'aliased_properties' => [],
'hide_properties' => [],
'id_properties' => [
'commentId',
],
'urls' => [
'self' => 'http://example.com/comments/{commentId}',
],
],
];

$mapper = new Mapper($mappings);
```

Calling the transformer will output a **valid JSON response** using the correct formatting:

```php
use NilPortugues\Api\JSend\JSendTransformer;
use NilPortugues\Api\JSend\Http\Message\Response;
use NilPortugues\Serializer\DeepCopySerializer;

$transformer = new JSendTransformer($mapper);

//Output transformation
$serializer = new DeepCopySerializer($transformer);
$serializer->setSelfUrl('http://example.com/posts/9');
$serializer->setNextUrl('http://example.com/posts/10');
$serializer->addMeta('author',[['name' => 'Nil Portugués Calderó', 'email' => '[email protected]']]);

$output = $serializer->serialize($post);

//PSR7 Response with headers and content.
$response = new Response($output);

header(
sprintf(
'HTTP/%s %s %s',
$response->getProtocolVersion(),
$response->getStatusCode(),
$response->getReasonPhrase()
)
);
foreach($response->getHeaders() as $header => $values) {
header(sprintf("%s:%s\n", $header, implode(', ', $values)));
}

echo $response->getBody();
```

**Output:**

```
HTTP/1.1 200 OK
Cache-Control: private, max-age=0, must-revalidate
Content-type: application/json; charset=utf-8
```

```json
{
"status": "success",
"data": {
"post_id": 9,
"title": "Hello World",
"content": "Your first post",
"author": {
"user_id": 1,
"name": "Post Author"
},
"comments": [
{
"comment_id": 1000,
"dates": {
"created_at": "2015-07-18T12:13:00+00:00",
"accepted_at": "2015-07-19T00:00:00+00:00"
},
"comment": "Have no fear, sers, your king is safe.",
"user": {
"user_id": 2,
"name": "Barristan Selmy"
}
}
]
},
"links": {
"self": {
"href": "http://example.com/post/9"
},
"next": {
"href": "http://example.com/post/10"
},
"comments": {
"href": "http://example.com/post/9/comments"
}
}
}
```

## Quality

To run the PHPUnit tests at the command line, go to the tests directory and issue phpunit.

This library attempts to comply with [PSR-1](http://www.php-fig.org/psr/psr-1/), [PSR-2](http://www.php-fig.org/psr/psr-2/), [PSR-4](http://www.php-fig.org/psr/psr-4/) and [PSR-7](http://www.php-fig.org/psr/psr-7/).

If you notice compliance oversights, please send a patch via [Pull Request](https://github.com/nilportugues/jsend-transformer/pulls).

## Contribute

Contributions to the package are always welcome!

* Report any bugs or issues you find on the [issue tracker](https://github.com/nilportugues/jsend-transformer/issues/new).
* You can grab the source code at the package's [Git repository](https://github.com/nilportugues/jsend-transformer).

## Support

Get in touch with me using one of the following means:

- Emailing me at
- Opening an [Issue](https://github.com/nilportugues/jsend-transformer/issues/new)
- Using Gitter: [![Gitter](https://badges.gitter.im/Join%20Chat.svg)](https://gitter.im/nilportugues/jsend-transformer?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge)

## Authors

* [Nil Portugués Calderó](http://nilportugues.com)
* [The Community Contributors](https://github.com/nilportugues/jsend-transformer/graphs/contributors)

## License
The code base is licensed under the [MIT license](LICENSE).