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File / Folder	Size	Action
.	-
Disallow.php	0.226KB	edt ren
Robots.php	2.182KB	edt ren
RobotsHeaders.php	2.979KB	edt ren
RobotsMeta.php	1.812KB	edt ren
RobotsTxt.php	13.533KB	edt ren
WhyDisallows.php	0.171KB	edt ren

<?php

namespace Spatie\Robots;

use InvalidArgumentException;

class RobotsHeaders
{
    protected array $robotHeadersProperties = [];

public static function readFrom(string $source): self
    {
        $content = @file_get_contents($source);

if ($content === false) {
            throw new InvalidArgumentException("Could not read from source `{$source}`");
        }

return new self($http_response_header ?? []);
    }

public static function create(array $headers): self
    {
        return new self($headers);
    }

public function __construct(array $headers)
    {
        $this->robotHeadersProperties = $this->parseHeaders($headers);
    }

public function mayIndex(string $userAgent = '*'): bool
    {
        return $this->none($userAgent) ? false : ! $this->noindex($userAgent);
    }

public function mayFollow(string $userAgent = '*'): bool
    {
        return $this->none($userAgent) ? false : ! $this->nofollow($userAgent);
    }

public function noindex(string $userAgent = '*'): bool
    {
        return
            $this->robotHeadersProperties[$userAgent]['noindex']
            ?? $this->robotHeadersProperties['*']['noindex']
            ?? false;
    }

public function nofollow(string $userAgent = '*'): bool
    {
        return
            $this->robotHeadersProperties[$userAgent]['nofollow']
            ?? $this->robotHeadersProperties['*']['nofollow']
            ?? false;
    }

public function none(string $userAgent = '*'): bool
    {
        return
            $this->robotHeadersProperties[$userAgent]['none']
            ?? $this->robotHeadersProperties['*']['none']
            ?? false;
    }

protected function parseHeaders(array $headers): array
    {
        $robotHeaders = $this->filterRobotHeaders($headers);

return array_reduce($robotHeaders, function (array $parsedHeaders, $header) {
            $header = $this->normalizeHeaders($header);

$headerParts = explode(':', $header);

$userAgent = count($headerParts) === 3
                ? trim($headerParts[1])
                : '*';

$options = end($headerParts);

$parsedHeaders[$userAgent] = [
                'noindex' => strpos(strtolower($options), 'noindex') !== false,
                'nofollow' => strpos(strtolower($options), 'nofollow') !== false,
                'none' => strpos(strtolower($options), 'none') !== false,
            ];

return $parsedHeaders;
        }, []);
    }

protected function filterRobotHeaders(array $headers): array
    {
        return array_filter($headers, function ($header) use ($headers) {
            $headerContent = $this->normalizeHeaders($headers[$header] ?? []);

return strpos(strtolower($header), 'x-robots-tag') === 0
                || strpos(strtolower($headerContent), 'x-robots-tag') === 0;
        }, ARRAY_FILTER_USE_KEY);
    }

protected function normalizeHeaders($headers): string
    {
        return implode(',', (array) $headers);
    }
}