README

Simple and fluent interface to retrieve data from NBP Web API.
This library structure is strongly inspired by knplabs/github-api package.

Installation

This package is decoupled from any HTTP client thanks to the HTTPlug.
Requires packages that provide http-client-implementation and psr/http-factory-implementation.
For more information visit HTTPlug for library users.

$ composer require kreyu/nbp-web-api

Usage

use Kreyu\NBPWebApi\Client;
use Kreyu\NBPWebApi\Api\ExchangeRates;

$client = new Client();

// Example call
$client->exchangeRates(ExchangeRates::TABLE_TYPE_A)->forCurrency('EUR')->latest(5);

Changing content type

If you wish to retrieve responses in XML format rather than JSON, you can change it in the client:

use Kreyu\NBPWebApi\Client;
use Kreyu\NBPWebApi\ClientInterface;

$client = new Client();
$client->setContentType(ClientInterface::CONTENT_TYPE_XML);

Providing HTTP client and factories

By default, the HTTP client builder uses HTTP client and factories provided by the discovery.
If you have to provide specific PSR-18 compliant client or any PSR-17 factory, you can pass them to the HTTP client builder:

use Kreyu\NBPWebApi\Client;
use Kreyu\NBPWebApi\Http\ClientBuilder as HttpClientBuilder;

/**
 * @var $client         Psr\Http\Client\ClientInterface
 * @var $requestFactory Psr\Http\Message\RequestFactoryInterface
 * @var $streamFactory  Psr\Http\Message\StreamFactoryInterface
 * @var $uriFactory     Psr\Http\Message\UriFactoryInterface
 */

$builder = new HttpClientBuilder(
    $client,
    $requestFactory,
    $streamFactory,
    $uriFactory
);

$client = new Client($builder);

Caching

To use caching mechanism, provide any PSR-6 compliant item pool to the HTTP client builder:

use Kreyu\NBPWebApi\Client;
use Kreyu\NBPWebApi\Http\ClientBuilder as HttpClientBuilder;

/** @var $pool Psr\Cache\CacheItemPoolInterface */

$builder = new HttpClientBuilder();
$builder->setCache($pool);

$client = new Client($builder);

Using HTTPlug plugins

You can provide any HTTPlug plugin to the HTTP client builder:

use Kreyu\NBPWebApi\Client;
use Kreyu\NBPWebApi\Http\ClientBuilder as HttpClientBuilder;

/** @var $plugin Http\Client\Common\Plugin */

$builder = new HttpClientBuilder();
$builder->addPlugin($plugin);

$client = new Client($builder);