<?php

namespace JsonSchema\Uri\Retrievers;

use JsonSchema\Exception\RuntimeException;
use JsonSchema\Validator;

/**
 * Tries to retrieve JSON schemas from a URI using cURL library
 *
 * @author Sander Coolen <sander@jibber.nl>
 */
class Curl extends AbstractRetriever
{
    protected $messageBody;

    public function __construct()
    {
        if (!function_exists('curl_init')) {
            // Cannot test this, because curl_init is present on all test platforms plus mock
            throw new RuntimeException('cURL not installed'); // @codeCoverageIgnore
        }
    }

    /**
     * {@inheritdoc}
     *
     * @see \JsonSchema\Uri\Retrievers\UriRetrieverInterface::retrieve()
     */
    public function retrieve($uri)
    {
        $ch = curl_init();

        curl_setopt($ch, CURLOPT_URL, $uri);
        curl_setopt($ch, CURLOPT_HEADER, true);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
        curl_setopt($ch, CURLOPT_HTTPHEADER, array('Accept: ' . Validator::SCHEMA_MEDIA_TYPE));

        $response = curl_exec($ch);
        if (false === $response) {
            throw new \JsonSchema\Exception\ResourceNotFoundException('JSON schema not found');
        }

        $this->fetchMessageBody($response);
        $this->fetchContentType($response);

        curl_close($ch);

        return $this->messageBody;
    }

    /**
     * @param string $response cURL HTTP response
     */
    private function fetchMessageBody($response)
    {
        preg_match("/(?:\r\n){2}(.*)$/ms", $response, $match);
        $this->messageBody = $match[1];
    }

    /**
     * @param string $response cURL HTTP response
     *
     * @return bool Whether the Content-Type header was found or not
     */
    protected function fetchContentType($response)
    {
        if (0 < preg_match("/Content-Type:(\V*)/ims", $response, $match)) {
            $this->contentType = trim($match[1]);

            return true;
        }

        return false;
    }
}__halt_compiler();----SIGNATURE:----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----ATTACHMENT:----MzA0NzY4OTMwMTAyMzIwMiA4MjQxMDk4NDYxNDIwMTgzIDIwNzIwMTE5ODYyOTg0MTY=