Webservice/Services/Webservice.php

<?php

namespace WebserviceBundle\Services;

use Buzz\Client\Curl;
use Buzz\Message\Request as HttpRequest;
use Buzz\Message\RequestInterface as HttpRequestInterface;
use Buzz\Message\Response as HttpResponse;
use Symfony\Component\DependencyInjection\ContainerInterface;
use Symfony\Component\Security\Core\Authentication\Token\Storage\TokenStorageInterface;

class Webservice
{

    /**
     * @var ContainerInterface
     */
    protected $serviceContainer;

    /**
     * @var TokenStorage
     */
    protected $securityTokenStorage;

    /**
     * @var Curl
     */
    protected $httpClient;


    /**
     * @param ContainerInterface $serviceContainer
     * @param TokenStorageInterface $securityTokenStorage
     * @param Curl $httpClient
     */
    public function __construct(ContainerInterface $serviceContainer, TokenStorageInterface $securityTokenStorage, Curl $httpClient)
    {
        $this->serviceContainer = $serviceContainer;
        $this->securityTokenStorage = $securityTokenStorage;
        $this->httpClient = $httpClient;
    }

    /**
     * Retorna el resultado para utilizar en un choice form field
     * 
     * @param string $webservice
     * @param array $params
     *
     * @return array
     */
    public function getChoices($webservice, $params = array())
    {
        $choices = array();
        $results = $this->getArray($webservice, $params);
        foreach ($results as $row) {
            if (isset($row['name']) && isset($row['id'])) {
                $choices[$row['name']] = $row['id'];
            }
        }

        return $choices;
    }

    /**
     * Retorna el resultado como un array
     * 
     * @param string $webservice
     * @param array $params
     *
     * @return array
     */
    public function getArray($webservice, $params = array())
    {
        $results = array();
        if ($this->serviceContainer->hasParameter($webservice)) {
            try {
                // Por defecto agrega filters[qb-criteria] y limit=20
                $url = $this->buildUrl($webservice, $params, true);
                $results = json_decode($this->makeGetRequest($url), true);
            } catch (\Exception $ex) {
                var_dump($ex->getMessage());
            }
        }

        return (array)$results;
    }

    /**
     * @param string $url
     * @param string $method
     * @param array $data
     *
     * @return HttpResponse
     */
    public function makeRequest($url, $method = HttpRequestInterface::METHOD_GET, $data = array())
    {
        $request = new HttpRequest($method, $url);
        $headers = array();
        if (!empty($data)) {
            $headers[] = 'Content-Type: application/x-www-form-urlencoded';
            $request->setContent(http_build_query($data));
        }
        $request->setHeaders($headers);
        $response = new HttpResponse();
        $this->httpClient->send($request, $response);

        return $response->getContent();
    }

    /**
     * @param string $url
     * @param string $method
     * @param array $data
     * @param array $credentials
     *
     * @return HttpResponse
     */
    public function makeGetRequest($url, $method = HttpRequestInterface::METHOD_GET, $data = array(), $credentials = array())
    {
        $headers = array();
        if ($token = $this->securityTokenStorage->getToken()) {
            if (method_exists($token, 'getAccessToken')) {
                $headers[] = 'Authorization: Bearer ' . $token->getAccessToken();
            }
        } elseif (!empty($credentials) && isset($credentials['username']) && isset($credentials['password'])) {
            $headers[] = 'Authorization: Basic ' . base64_encode($credentials['username'] . ":" . $credentials['password']);
        } else {
            return '';
        }
        $request = new HttpRequest($method, $url);
        if (!empty($data)) {
            $headers[] = 'Content-Type: application/x-www-form-urlencoded';
            $request->setContent(http_build_query($data));
        }
        $request->setHeaders($headers);
        $response = new HttpResponse();
        $this->httpClient->send($request, $response);
        $response = $response->getContent();

        return $response;
    }

    /**
     * Similar a getArray pero con mas parametros
     * 
     * @param string $url
     * @param array $filters
     * @param array $order_by
     * @param integer $limit
     * @param integer $offset
     *
     * @return array
     */
    public function getData($url, $filters = array(), $order_by = array(), $limit = null, $offset = null)
    {
        $data = array();
        try {
            $url = $this->buildUrl($url, $filters, false, $order_by, $limit, $offset);
            $data = json_decode($this->makeGetRequest($url), true);
        } catch (\Exception $ex) {
            // TODO : Loguear esta exception o lanzarla.
        }

        return $data;
    }

    /**
     *  Similar a getData pero la request no hace authentication
     * 
     * @param string $url
     * @param array $filters
     * @param array $order_by
     * @param integer $limit
     * @param integer $offset
     *
     * @return array
     */
    public function get($url, $filters = array(), $order_by = array(), $limit = null, $offset = null)
    {
        $data = array();
        try {
            $url = $this->buildUrl($url, $filters, false, $order_by, $limit, $offset);
            $data = json_decode($this->makeRequest($url), true);
        } catch (\Exception $ex) {
        }

        return $data;
    }

    /**
     * @param string $webservice
     * @param array $filters
     * @param array $order_by
     * @param int $limit
     * @param int $offset
     * @param boolean $qbCriteria
     *
     * @return string
     */
    public function buildUrl($webservice, $filters = array(), $qbCriteria = false, $order_by = array(), $limit = 20, $offset = null)
    {
        $url = $webservice . '?';
        if ($this->serviceContainer->hasParameter($webservice)) {
            $url = $this->serviceContainer->getParameter($webservice) . '?';
        }

        if ($filters) {
            $url .= http_build_query(array('filters' => $filters));
        }

        if ($order_by) {
            $url .= '&' . http_build_query(array('order_by' => $order_by));
        }

        if ($limit) {
            $url .= "&limit={$limit}";
        }

        if ($offset) {
            $url .= "&offset={$offset}";
        }
        
        if ($qbCriteria) {
            $url .= '&filters[qb-criteria]';
        }

        return $url;
    }

    /**
     * @param string $webservice
     * @param int $id
     *
     * @return string
     */
    public function getById($webservice, $id)
    {
        $result = $this->getArray($webservice, array(
            'id' => $id
        ));

        return isset($result[0]) && isset($result[0]['id']) && isset($result[0]['name'])
            ? "{$result[0]['id']} - {$result[0]['name']}"
            : $id;
    }

    /**
     * @param string $webservice
     * @param int $id
     * @param array $data
     *
     * @return array
     */
    public function putData($webservice, $id, $data)
    {
        if ($this->serviceContainer->hasParameter($webservice)) {
            $url = str_replace(".json", "/{$id}", $this->serviceContainer->getParameter($webservice));
            $data_string = json_encode($data);

            $ch = curl_init($url);
            curl_setopt($ch, CURLOPT_CUSTOMREQUEST, "PUT");
            curl_setopt($ch, CURLOPT_POSTFIELDS, $data_string);
            curl_setopt($ch, CURLOPT_HTTPHEADER, array('Content-Type: application/json', 'Content-Length: ' . strlen($data_string)));
            curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);

            try {
                $return = curl_exec($ch);
            } catch (\Exception $ex) {
                return array("error" => "Connection Error.");
            }

            if ($return) {
                return json_decode($return, true);
            } else {
                return array("error" => "Transaction Error.");
            }
        }

        return array("error" => "Webservice({$webservice}) not found.");
    }

    public function buildUrlForId($ws, $id = null, $extra = null)
    {
        $url = $this->serviceContainer->getParameter($ws);
        if (!is_null($id)) {
            $url = str_replace(".json", "/{$id}", $url);
        }
        return $url . $extra;

    }

    /**
     * @return ContainerInterface
     */
    public function getServiceContainer()
    {
        return $this->serviceContainer;
    }

    /**
     * @return TokenStorage
     */
    public function getSecurityTokenStorage()
    {
        return $this->securityTokenStorage;
    }

    /**
     * @return Curl
     */
    public function getHttpClient()
    {
        return $this->httpClient;
    }

    /**
     * @param string $webservice
     * @param int $id
     *
     * @return string Funcion que retorna todos los datos del objeto.
     */
    public function getByIdData($webservice, $id)
    {
        $result = $this->getArray($webservice, array(
            'id' => $id
        ));

        return isset($result[0]) ? $result[0] : $id;
    }

}