nilportugues / api-transformer
Base library providing the core functionality for API transformation.
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Requires
- php: >=7.0
- nilportugues/serializer: ~1.1
- psr/http-message: ~1.0
- zendframework/zend-diactoros: ^1.1.0
Requires (Dev)
- fabpot/php-cs-fixer: ~1.9
- nilportugues/php_backslasher: ~0.2
- phpunit/phpunit: 5.*
README
Purpose
This library provides the core functionality for API transformation and is a base library for many other packages.
By itself it's not usable at all. Check the projects using it below.
Used by
Currently the following transformers make use of this library as foundation:
Installation
Use Composer to install the package:
$ composer require nilportugues/api-transformer
How it works
Loading must be done using the Mapper
class, as it expects an array containing a defined structure, or a class name implementing ApiMapping
.
There are 2 styles for flexibility when integrating the library into PHP frameworks.
While I discourage having 2 styles for mapping it is well possible to have them side by side in the very same configuration file. The Mapper
class that loads all Mappings does internal transformation for both, so client does not have to worry.
Usage
use NilPortugues\Api\Mapping\Mapper; use NilPortugues\AcmeProject\Infrastructure\Api\Mappings\PostApiMapping; $arrayConfig = include 'mappings.php'; $classConfig = [ PostApiMapping::class, ]; $mappings = array_merge($classConfig, $arrayConfig); //Now $mapper can be passed to a Transformer. $mapper = new Mapper($mappings);
Creating the Mapping files
Implementing ApiMapping (Prefered method)
To create a Mapping you may implement the following interfaces:
ApiMapping
: transform your data into plain JSON for API consumtion or the JSend API format.JsonApiMapping
to transform your data into the JSONAPI 1.0 standard.HalMapping
to transform your data to HAL+JSON and HAL+XML API standards.
As expected you may implement many interfaces to support multiple API formats.
<?php namespace NilPortugues\AcmeProject\Infrastructure\Api\Mappings; use NilPortugues\AcmeProject\Blog\Domain\Post; use NilPortugues\Api\Mappings\HalMapping; use NilPortugues\Api\Mappings\JsonApiMapping; class PostApiMapping implements JsonApiMapping, HalMapping { /** * {@inheritdoc} */ public function getClass() : string { return Post::class; } /** * {@inheritdoc} */ public function getAlias() : string { return 'Posting'; //If none is used 'Post' will be used instead. } /** * {@inheritdoc} */ public function getAliasedProperties() : array { return [ 'title' => 'headline', 'content' => 'body', ]; } /** * {@inheritdoc} */ public function getHideProperties() : array { return [ 'comments', ]; } /** * {@inheritdoc} */ public function getIdProperties() : array { return [ 'postId', ]; } /** * {@inheritdoc} */ public function getUrls() : array { return [ // Mandatory 'self' => 'http://example.com/posts/{postId}', // Optional 'comments' => 'http://example.com/posts/{postId}/comments', ]; } /** * Returns an array of curies. * * @return array */ public function getCuries() : array { return [ 'name' => 'example', 'href' => 'http://example.com/docs/rels/{rel}', ]; } /** * {@inheritdoc} */ public function getRelationships() : array { return [ 'author' => [ 'related' => 'http://example.com/posts/{postId}/author', 'self' => 'http://example.com/posts/{postId}/relationships/author', ], ]; } }
Mapping using an array
// mappings.php return [ [ 'class' => Post::class, 'alias' => 'Posting', //If none is used 'Post' will be used instead. 'aliased_properties' => [ 'title' => 'headline', 'content' => 'body', ], 'hide_properties' => [ 'comments', ], 'id_properties' => [ 'postId', ], 'urls' => [ // Mandatory 'self' => 'http://example.com/posts/{postId}', // Optional 'comments' => 'http://example.com/posts/{postId}/comments', ], // (Optional) Used by HAL+JSON / HAL+XML 'curies' => [ 'name' => 'example', 'href' => 'http://example.com/docs/rels/{rel}', ], // (Optional) Used by JSONAPI 'relationships' => [ 'author' => [ 'related' => 'http://example.com/posts/{postId}/author', 'self' => 'http://example.com/posts/{postId}/relationships/author', ], ] ], ];
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, PSR-2, PSR-4 and PSR-7.
If you notice compliance oversights, please send a patch via Pull Request.
Contribute
Contributions to the package are always welcome!
- Report any bugs or issues you find on the issue tracker.
- You can grab the source code at the package's Git repository.
Support
Get in touch with me using one of the following means:
- Emailing me at contact@nilportugues.com
- Opening an Issue
Authors
License
The code base is licensed under the MIT license.