SimpleApi

Tiny package for setting up a simple REST API with PHP.
Ability to group routes and define middlewares on a group or route level.

Usage

1. Implement the iApiController interface with your controller. A method can return StringResult, DataResult or ErrorResult which always return arrays with different structure based on the result.

<?php

use Incapption\SimpleApi\Models\ApiRequest;
use Incapption\SimpleApi\Models\StringResult;
use Incapption\SimpleApi\Enums\HttpStatusCode;
use Incapption\SimpleApi\Interfaces\iMethodResult;
use Incapption\SimpleApi\Interfaces\iApiController;

class TestController implements iApiController
{
  public function get(ApiRequest $request): iMethodResult
  {
     return new StringResult(HttpStatusCode::SUCCESS(), 'TestController->get()');
  }

  public function index(ApiRequest $request): iMethodResult
  {
    return new StringResult(HttpStatusCode::SUCCESS(), 'TestController->index()');
  }

  public function create(ApiRequest $request): iMethodResult
  {
    return new StringResult(HttpStatusCode::SUCCESS(), 'TestController->create()');
  }

  public function update(ApiRequest $request): iMethodResult
  {
    return new StringResult(HttpStatusCode::SUCCESS(), 'TestController->update()');
  }

  public function delete(ApiRequest $request): iMethodResult
  {
    return new StringResult(HttpStatusCode::SUCCESS(), 'TestController->delete()');
  }
}

2. Extend the SimpleApi class. Here you can group and register your routes.

<?php

use Incapption\SimpleApi\SimpleApi;
use Incapption\SimpleApi\SimpleApiRoute;
use Incapption\SimpleApi\Tests\Controllers\TestController;
use Incapption\SimpleApi\Tests\Middleware\AuthenticationMiddleware;

class SimpleApiExtension extends SimpleApi
{
  public function __construct(string $requestUri, string $requestMethod, array $headers = [], array $input = [])
  {
    parent::__construct($requestUri, $requestMethod, $headers, $input);
    $this->registerRoutes();
  }

  protected function registerRoutes()
  {
    // A group which always requires authentication
    SimpleApiRoute::registerGroup('user', [new AuthenticationMiddleware()]);

    // A public endpoint not requiring authentication. The 'public' group is defined without middleware.
    SimpleApiRoute::registerGet('public', '/api/currencies', TestController::class, 'get');

    // The middleware defined for group 'user' above will be executed when calling this route.
    SimpleApiRoute::registerGet('user', '/api/user/{userId}/files', TestController::class, 'get');

    // Example for a group which might require user authentication middleware
    SimpleApiRoute::registerGet('internal', '/api/schema', TestController::class, 'get', [new AuthenticationMiddleware()]);
  }
}

3. In your application root (e.g. app.php) use this controller to verify if the request is an API request, call the method and return the result.

use Incapption\SimpleApi\Helper\HttpHeader;
use Incapption\SimpleApi\Helper\HttpPayload;use Incapption\SimpleApi\Tests\SimpleApiExtension;

$api = new SimpleApiExtension($_SERVER["REQUEST_URI"], $_SERVER["REQUEST_METHOD"], HttpHeader::getAll(), HttpPayload::getInput());

// Check if the actual request is targeted at your API endpoint
if ($api->isApiEndpoint('/api/v1'))
{
  $result = $api->getResult();
  // Returns the result as JSON and exits the application
  $api->sendAndTerminate($result);
}

The returned JSON format is like this depending on whether the Controller method returns a StringResult, DataResult or ErrorResult object:

Example for DataResult which returns an object of unknown structure.

{
  "name": "John Doe",
  "age": 27
}

Example for return type StringResult, which always returns a message of type string

{
  "message": "This request was a success"
}

Example for return type ErrorResult, which always contains an errors key which contains either a string or list of errors.

{
  "errors": "User ID is required"
}

{
  "errors": {
     "user_id": [
        "Must be of type string"
     ]
  }
}

Tests

Create a phpunit.xml in the project directory. Run PHPUnit referencing this xml. For example: php.exe ./SimpleApi/vendor/phpunit/phpunit/phpunit --configuration .\SimpleApi\phpunit.xml --teamcity

<?xml version="1.0" encoding="UTF-8"?>
<phpunit xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" bootstrap="./vendor/autoload.php"
         convertErrorsToExceptions="true" convertNoticesToExceptions="true" convertWarningsToExceptions="true"
         processIsolation="false" stopOnFailure="true"
         xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/9.5/phpunit.xsd">
    <coverage>
        <include>
            <directory suffix=".php">src/</directory>
        </include>
    </coverage>
    <testsuites>
        <testsuite name="SimpleApi Test Suite">
            <directory>tests</directory>
        </testsuite>
    </testsuites>
</phpunit>