dshovchko / php_UAPAY

src/Request.php

<?php

namespace UAPAY;

use UAPAY\Log as Log;
use UAPAY\Exception;
use Firebase\JWT\JWT;

abstract class Request
{
    /**
     *      @var object
     */
    protected $client;

    /**
     *      @var array
     */
    protected $jwt=array(
        'using'         => false,
        'UAPAY_pubkey'  => '',
        'our_privkey'   => '',
        'key_type'      => '',
        'algorithm'     => '',
    );

    /**
     *      @var array
     */
    protected $data;

    /**
     *      Constructor
     *
     *      @param array $options array of options
     *      @throws Exception\Data
     */
    public function __construct($options)
    {
        // api_url
        if ( ! isset($options['api_uri']))
        {
            throw new Exception\Data('parameter api_uri is not specified');
        }

        $jo = new JWTOptions($options);
        $this->jwt = $jo->get();

        // http client
        $this->client = new \GuzzleHttp\Client([
            'base_uri'      => $options['api_uri'],
            'timeout'       => 2.0,
        ]);
    }

    /**
     *      get/set data
     *
     *      @param array $value
     *      @return array
     */
    public function data($value=null)
    {
        if ($value !== null)
        {
            $this->data = $this->as_array($value);
        }

        return $this->data;
    }

    /**
     *      Cast to string
     *
     *      @param mixed $value
     *      @return string
     */
    protected function as_string($value=null)
    {
        return (is_scalar($value))?((is_bool($value))?(($value)?'true':'false'):"$value"):null;
    }

    /**
     *      Cast to integer
     *
     *      @param mixed $value
     *      @return integer
     */
    protected function as_int($value=null)
    {
        return (is_int($value))?$value:null;
    }

    /**
     *      Cast to array
     *
     *      @param mixed $value
     *      @return array
     */
    protected function as_array($value=null)
    {
        return (is_array($value))?$value:null;
    }

    /**
     *      Returns params set
     *
     *      @return array
     */
    public function get_params()
    {
        return array();
    }

    /**
     *      Returns iat param
     *
     *      @return integer
     */
    public function get_param_iat()
    {
        return time();
    }

    /**
     *      Returns the JSON representation of class
     *
     *      @return string
     */
    public function get_json()
    {
        $payload = $this->create_payload();

        if ($this->jwt['using'] === true)
        {
            $payload = $this->alter_payload_for_jwt($payload);
        }
        $json = json_encode($payload, JSON_UNESCAPED_SLASHES);

        Log::instance()->debug('build JSON:');
        Log::instance()->debug($json);

        return $json;
    }

    /**
     *      Create payload array
     *
     *      @return array
     */
    protected function create_payload()
    {
        $ar = array(
            'params' => $this->get_params()
        );
        if (isset($this->data))
        {
            $ar['data'] = $this->data;
        }

        return $ar;
    }

    /**
     *      Alter payload array with JWT-token
     *
     *      @param array $payload
     *      @return array
     */
    protected function alter_payload_for_jwt($payload)
    {
        $payload['iat'] = $this->get_param_iat();

        return array(
            'params' => $payload['params'],
            'token' => $this->token_encode($payload)
        );
    }

    /**
     *      Get private key for encode payload
     *
     *      @return string
     */
    protected function own_private_key()
    {
        return (new Key($this->jwt['key_type']))->get($this->jwt['our_privkey'], 'private');
    }

    /**
     *      Encode payload and return token
     *
     *      @param array $payload
     *      @throws Exception\JSON
     *      @return string Token
     */
    protected function token_encode($payload)
    {
        Log::instance()->debug('encode payload:');
        Log::instance()->debug(print_r($payload, true));
        try
        {
            $token = JWT::encode($payload, $this->own_private_key(), $this->jwt['algorithm']);
        }
        catch (\Exception $e)
        {
            Log::instance()->error($e->getMessage().PHP_EOL.$e->getTraceAsString());
            throw new Exception\JSON('unable to create JWT token', $e);
        }

        return $token;
    }

    /**
     *      Send request to UAPAY
     *
     *      @return object Response
     */
    public function send()
    {
        Log::instance()->add('send request to '.$this->api_path);
        try
        {
            $httpresponse = $this->client->request('POST', $this->api_path, [
                'headers' => [
                    'User-Agent'    => 'php_UAPAY/1.0',
                    'Content-Type'  => 'application/json'
                ],
                'body' => $this->get_json()
            ]);
            $body = $httpresponse->getBody()->getContents();
            Log::instance()->debug('got response:'.PHP_EOL.$body);
            return new $this->response_class($body, $this->jwt);
        }
        catch (\GuzzleHttp\Exception\RequestException $e)
        {
            $this->handle_request_exception($e);
        }
    }

    /**
     *      Handle request exception
     *
     *      @param \GuzzleHttp\Exception\RequestException $e
     *      @throws Exception\Transfer
     */
    protected function handle_request_exception($e)
    {
        Log::instance()->debug('request:'.PHP_EOL.\GuzzleHttp\Psr7\str($e->getRequest()));

The function GuzzleHttp\Psr7\str() has been deprecated: str will be removed in guzzlehttp/psr7:2.0. Use Message::toString instead.

        if ($e->hasResponse()) {
            Log::instance()->debug('response:'.PHP_EOL.\GuzzleHttp\Psr7\str($e->getResponse()));

The function GuzzleHttp\Psr7\str() has been deprecated: str will be removed in guzzlehttp/psr7:2.0. Use Message::toString instead.

        }

        throw new Exception\Transfer('an error occured during a transfer');
    }
}