vipnytt\RobotsTxtParser\Client\DownloadHandler

Complexity

Total Complexity

13

Size/Duplication

Total Lines	154
Duplicated Lines	0 %

Coupling/Cohesion

Components	1
Dependencies	4

Importance

Changes	1
Bugs	0	Features	0

8 Methods

Rating	Name	Duplication	Size	Complexity
B	__construct()	0	35	2
A	headerEncoding()	0	13	4
A	detectEncoding()	0	7	2
A	getContents()	0	4	1
A	connectionIssue()	0	6	1
A	parserClient()	0	4	1
A	getStatusCode()	0	4	1
A	getEncoding()	0	4	1

<?php
namespace vipnytt\RobotsTxtParser\Client;

use GuzzleHttp;
use vipnytt\RobotsTxtParser\Client;
use vipnytt\RobotsTxtParser\Parser\RobotsTxtInterface;

/**
 * Class DownloadHandler
 *
 * @package vipnytt\RobotsTxtParser\Client
 */
class DownloadHandler implements RobotsTxtInterface
{
    /**
     * Base uri
     * @var string
     */
    protected $baseUri;

    /**
     * HTTP Status code
     * @var int
     */
    protected $statusCode;

    /**
     * Robots.txt contents
     * @var string
     */
    protected $contents;

    /**
     * Robots.txt character encoding
     * @var string
     */
    protected $encoding;

    /**
     * DownloadHandler constructor.
     *
     * @param string $baseUri
     * @param array $guzzleConfig
     */
    public function __construct($baseUri, $guzzleConfig = [])
    {
        $this->baseUri = $baseUri;
        try {
            $client = new GuzzleHttp\Client(
                array_merge_recursive(
                    [
                        'allow_redirects' => [
                            'max' => self::MAX_REDIRECTS,
                            'referer' => true,
                            'strict' => true,
                            'track_redirects' => true,
                        ],
                        'base_uri' => $baseUri,
                        'headers' => [
                            'Accept' => 'text/plain;q=1.0, text/*;q=0.8, */*;q=0.1',
                            'Accept-Charset' => 'utf-8;q=1.0, *;q=0.1',
                            'Accept-Encoding' => 'identity;q=1.0, *;q=0.1',
                            'User-Agent' => 'RobotsTxtParser-VIPnytt/1.0 (+https://github.com/VIPnytt/RobotsTxtParser/blob/master/README.md)',
                        ],
                        'http_errors' => false,
                        'timeout' => 60,
                        'verify' => true,
                    ],
                    $guzzleConfig
                )
            );
            $response = $client->request('GET', '/robots.txt');
            $this->statusCode = $response->getStatusCode();
            $this->contents = $response->getBody()->getContents();
            $this->encoding = $this->headerEncoding($response->getHeader('content-type')[0]);
        } catch (GuzzleHttp\Exception\ConnectException $e) {
            $this->connectionIssue();
        }
    }

    /**
     * HTTP header encoding
     *
     * @param $header
     * @return string
     */
    protected function headerEncoding($header)
    {
        $split = array_map('trim', mb_split(';', $header));
        foreach ($split as $string) {
            if (mb_stripos($string, 'charset=') === 0) {
                $encoding = mb_split('=', $string, 2)[1];
                if (in_array(mb_strtolower($encoding), array_map('mb_strtolower', mb_list_encodings()))) {
                    return $encoding;
                }
            }
        }
        return $this->detectEncoding();
    }

    /**
     * Manually detect encoding
     *
     * @return string
     */
    protected function detectEncoding()
    {
        if (($encoding = mb_detect_encoding($this->getContents())) !== false) {
            return $encoding;
        }
        return self::ENCODING;
    }

    /**
     * URL content
     *
     * @return string
     */
    public function getContents()
    {
        return $this->contents;
    }

    /**
     * Connection issue
     *
     * @return void
     */
    private function connectionIssue()
    {
        $this->statusCode = 523;
        $this->contents = '';
        $this->encoding = self::ENCODING;
    }

    /**
     * Parser client
     *
     * @param int|null $byteLimit
     * @return Client
     */
    public function parserClient($byteLimit = self::BYTE_LIMIT)
    {
        return new Client($this->baseUri, $this->getStatusCode(), $this->getContents(), $this->getEncoding(), $byteLimit);
    }

    /**
     * Status code
     *
     * @return int
     */
    public function getStatusCode()
    {
        return $this->statusCode;
    }

    /**
     * Encoding
     *
     * @return string
     */
    public function getEncoding()
    {
        return $this->encoding;
    }
}