README

安装
映射
- 2.1 使用数组映射
- 2.2 使用映射类映射
HAL 序列化
- 3.1 HAL+JSON
- 3.2 HAL+XML
HAL 分页资源
PSR-7 响应对象

1. 安装

使用 Composer 安装软件包

$ composer require nilportugues/hal

2. 映射

给定一个 PHP 对象和一系列映射，HAL+JSON 和 HAL+XML API 转换器将根据 https://tools.ietf.org/html/draft-kelly-json-hal-07 规范草案表示给定数据。

例如，给定以下代码，定义一个博客文章和一些评论

$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'),
          ]
      ),
  ]
);

我们需要映射所有涉及的类。这可以作为一个单一的数组或一系列映射类来完成。

2.1 使用数组映射

以下是如何使用数组映射涉及类

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' => [
            // Mandatory
            'self' => 'http://example.com/posts/{postId}',
             // Optional
            'comments' => 'http://example.com/posts/{postId}/comments'
        ],
        'curies' => [
            'name' => 'example',
            'href' => "http://example.com/docs/rels/{rel}",
        ]
    ],
    [
        'class' => User::class,
        'alias' => '',
        'aliased_properties' => [],
        'hide_properties' => [],
        'id_properties' => [
            'userId',
        ],
        'urls' => [
            'self' => 'http://example.com/users/{userId}',
        ],
        'curies' => [
            'name' => 'example',
            'href' => "http://example.com/docs/rels/{rel}",
        ]
    ],
    [
        'class' => Comment::class,
        'alias' => '',
        'aliased_properties' => [],
        'hide_properties' => [],
        'id_properties' => [
            'commentId',
        ],
        'urls' => [
            'self' => 'http://example.com/comments/{commentId}',
        ],
        'curies' => [
            'name' => 'example',
            'href' => "http://example.com/docs/rels/{rel}",
        ]
    ]
];

$mapper = new Mapper($mappings);

2.2 使用映射类映射

为了使用映射类，你需要为每个涉及的类创建一个新的类。

这种映射方式比使用数组具有更好的可扩展性。

所有映射类都将扩展 \NilPortugues\Api\Mappings\HalMapping 接口。

// PostMapping.php

class PostMapping implements \NilPortugues\Api\Mappings\HalMapping 
{
    public function getClass()
    {
        return Post::class;
    }

    public function getAlias()
    {
        return 'Message';
    }

    public function getAliasedProperties()
    {
        return [
           'author' => 'author',
           'title' => 'headline',
           'content' => 'body',
       ];
    }

    public function getHideProperties()
    {
        return [];
    }

    public function getIdProperties()
    {
        return ['postId'];
    }
   
    public function getUrls()
    {
        return [            
            'self' => 'http://example.com/posts/{postId}', // Mandatory            
            'comments' => 'http://example.com/posts/{postId}/comments' // Optional
        ];
    }

    public function getCuries()
    {
        return [
           'name' => 'example',
           'href' => "http://example.com/docs/rels/{rel}",
        ];
    }
}


// UserMapping.php

class UserMapping implements \NilPortugues\Api\Mappings\HalMapping 
{
    public function getClass()
    {
        return User::class;
    }

    public function getAlias()
    {
        return '';
    }

    public function getAliasedProperties()
    {
        return [];
    }

    public function getHideProperties()
    {
        return [];
    }

    public function getIdProperties()
    {
        return ['postId'];
    }
   
    public function getUrls()
    {
        return [            
            'self' => 'http://example.com/users/{userId}'
        ];
    }

    public function getCuries()
    {
        return [
           'name' => 'example',
           'href' => "http://example.com/docs/rels/{rel}",
        ];
    }
}


// CommentMapping.php

class CommentMapping implements \NilPortugues\Api\Mappings\HalMapping 
{
    public function getClass()
    {
        return Comment::class;
    }

    public function getAlias()
    {
        return '';
    }

    public function getAliasedProperties()
    {
        return [];
    }

    public function getHideProperties()
    {
        return [];
    }

    public function getIdProperties()
    {
        return ['commentId'];
    }
   
    public function getUrls()
    {
        return [            
            'self' => 'http://example.com/comments/{commentId}',
        ];
    }

    public function getCuries()
    {
        return [
           'name' => 'example',
           'href' => "http://example.com/docs/rels/{rel}",
        ];
    }
} 

$mappings = [
    PostMapping::class,
    UserMapping::class,
    CommentMapping::class,
];
$mapper = new Mapper($mappings);

3. HAL 序列化

调用转换器将输出一个格式正确的 有效 HAL 响应。

use NilPortugues\Api\Hal\JsonTransformer; 
use NilPortugues\Api\Hal\HalSerializer;
use NilPortugues\Api\Hal\Http\Message\Response;

$transformer = new JsonTransformer($mapper);
//For XML: $transformer = new XmlTransformer($mapper);

//Output transformation
$serializer = new HalSerializer($transformer);
$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();

3.1 HAL+JSON

HTTP/1.1 200 OK
Cache-Control: private, max-age=0, must-revalidate
Content-type: application/hal+json

输出

{
    "post_id": 9,
    "headline": "Hello World",
    "body": "Your first post",
    "_embedded": {
        "author": {
            "user_id": 1,
            "name": "Post Author",
            "_links": {
                "self": {
                    "href": "http://example.com/users/1"
                },
                "example:friends": {
                    "href": "http://example.com/users/1/friends"
                },
                "example:comments": {
                    "href": "http://example.com/users/1/comments"
                }
            }
        },
        "comments": [
            {
                "comment_id": 1000,
                "dates": {
                    "created_at": "2015-08-13T22:47:45+02:00",
                    "accepted_at": "2015-08-13T23:22:45+02:00"
                },
                "comment": "Have no fear, sers, your king is safe.",
                "_embedded": {
                    "user": {
                        "user_id": 2,
                        "name": "Barristan Selmy",
                        "_links": {
                            "self": {
                                "href": "http://example.com/users/2"
                            },
                            "example:friends": {
                                "href": "http://example.com/users/2/friends"
                            },
                            "example:comments": {
                                "href": "http://example.com/users/2/comments"
                            }
                        }
                    }
                },
                "_links": {
                    "example:user": {
                        "href": "http://example.com/users/2"
                    },
                    "self": {
                        "href": "http://example.com/comments/1000"
                    }
                }
            }
        ]
    },
    "_links": {
        "curies": [
            {
                "name": "example",
                "href": "http://example.com/docs/rels/{rel}",
                "templated": true
            }
        ],
        "self": {
            "href": "http://example.com/posts/9"
        },
        "example:author": {
            "href": "http://example.com/users/1"
        },
        "example:comments": {
            "href": "http://example.com/posts/9/comments"
        }
    }
}

3.2 HAL+XML

对于 XML 输出，请使用示例代码，但使用 XML 转换器而不是 HAL 转换器。

$transformer = new XmlTransformer($mapper);

输出

HTTP/1.1 200 OK
Cache-Control: private, max-age=0, must-revalidate
Content-type: application/hal+xml

<?xml version="1.0" encoding="UTF-8"?>
<resource href="http://example.com/posts/9">
  <post_id><![CDATA[9]]></post_id>
  <headline><![CDATA[Hello World]]></headline>
  <body><![CDATA[Your first post]]></body>
  <embedded>
    <resource href="http://example.com/users/1" rel="author">
      <user_id><![CDATA[1]]></user_id>
      <name><![CDATA[Post Author]]></name>
      <links>
        <link rel="self" href="http://example.com/users/1"/>
        <link rel="example:friends" href="http://example.com/users/1/friends"/>
        <link rel="example:comments" href="http://example.com/users/1/comments"/>
      </links>
    </resource>
    <comments>
      <resource href="http://example.com/comments/1000">
        <comment_id><![CDATA[1000]]></comment_id>
        <dates>
          <created_at><![CDATA[2015-07-18T12:13:00+00:00]]></created_at>
          <accepted_at><![CDATA[2015-07-19T00:00:00+00:00]]></accepted_at>
        </dates>
        <comment><![CDATA[Have no fear, sers, your king is safe.]]></comment>
        <embedded>
          <resource href="http://example.com/users/2" rel="user">
            <user_id><![CDATA[2]]></user_id>
            <name><![CDATA[Barristan Selmy]]></name>
            <links>
              <link rel="self" href="http://example.com/users/2"/>
              <link rel="example:friends" href="http://example.com/users/2/friends"/>
              <link rel="example:comments" href="http://example.com/users/2/comments"/>
            </links>
          </resource>
        </embedded>
        <links>
          <link rel="example:user" href="http://example.com/users/2"/>
          <link rel="self" href="http://example.com/comments/1000"/>
        </links>
      </resource>
    </comments>
  </embedded>
  <links>
    <curies>
      <link rel="resource" href="http://example.com/docs/rels/{rel}">
        <name><![CDATA[example]]></name>
        <templated><![CDATA[true]]></templated>
      </link>
    </curies>
    <link rel="self" href="http://example.com/posts/9"/>
    <link rel="example:author" href="http://example.com/users/1"/>
    <link rel="example:comments" href="http://example.com/posts/9/comments"/>
  </links>
</resource>

4. HAL 分页资源

提供了一个分页对象以简化此软件包的使用。

对于 XML 和 JSON 输出，使用 HalPagination 对象构建当前资源的分页表示。

HalPagination 提供的方法如下

setSelf($self)
setFirst($first)
setPrev($prev)
setNext($next)
setLast($last)
setCount($count)
setTotal($total)
setEmbedded(array $embedded)

要使用它，创建一个新的 HalPagination 实例，使用设置器，并将实例传递给序列化器的 serialize($value) 方法。

其他一切都将由序列化器本身处理。就这么简单！

use NilPortugues\Api\Hal\HalPagination; 
use NilPortugues\Api\Hal\HalSerializer; 
use NilPortugues\Api\Hal\JsonTransformer; 

// ...
//$objects is an array of objects, such as Post::class.
// ...
 
$page = new HalPagination();

//set the amounts
$page->setTotal(20);
$page->setCount(10);

//set the objects
$page->setEmbedded($objects);

//set up the pagination links
$page->setSelf('/post?page=1');
$page->setPrev('/post?page=1');
$page->setFirst('/post?page=1');
$page->setLast('/post?page=1');

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

5. 响应对象

以下 PSR-7 响应对象提供正确的头和 HTTP 状态代码。

使用它是可选的，作为起点提供。

NilPortugues\Api\Hal\Http\Message\ErrorResponse($body)
NilPortugues\Api\Hal\Http\Message\ResourceCreatedResponse($body)
NilPortugues\Api\Hal\Http\Message\ResourceDeletedResponse($body)
NilPortugues\Api\Hal\Http\Message


NilPortugues\Api\Hal\Http\Message

NilPortugues\Api\Hal\Http\Message

NilPortugues\Api\Hal\Http\Message

NilPortugues\Api\Hal\Http\Message

NilPortugues\Api\Hal\Http\Message

NilPortugues\Api\Hal\Http\Message


质量
在命令行中运行PHPUnit测试，请转到tests目录并输入phpunit。
此库试图遵守PSR-1、PSR-2、PSR-4和PSR-7。
如果您发现遵守上的疏忽，请通过Pull Request发送补丁。
贡献
欢迎对包的贡献！

在问题跟踪器上报告您发现的任何错误或问题。
您可以在包的Git仓库中获取源代码。

支持
您可以通过以下方式之一与我联系：

通过contact@nilportugues.com给我发送电子邮件
创建一个问题

作者

Nil Portugués Calderó
社区贡献者

许可
代码库采用MIT许可。

nilportugues / haljson

维护者

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