<?php

namespace ActivityPhp\Server;

use ActivityPhp\Server\Http\Request as HttpRequest;
use ActivityPhp\Type;
use ActivityPhp\Type\Util;
use DateInterval;
use DateTime;
use Exception;

/**
 * \ActivityPhp\Server\Helper provides global helper methods for a server
 * instance.
 */
abstract class Helper
{
    /**
     * An array of allowed Accept HTTP headers
     *
     * @see https://www.w3.org/TR/activitypub/#client-to-server-interactions
     *
     * @var string[]
     */
    protected static $acceptHeaders = [
        'application/ld+json; profile="https://www.w3.org/ns/activitystreams"',
        'application/activity+json',
        '*/*'
    ];

    /**
     * Validate HTTP Accept headers
     *
     * @param  null|string|array $accept
     * @param  bool              $strict Strict mode
     * @return bool
     * @throws \Exception when strict mode enabled
     */
    public static function validateAcceptHeader($accept, $strict = false)
    {
        if (is_string($accept)
            && in_array($accept, self::$acceptHeaders)
        ) {
            return true;
        } elseif (is_array($accept)
            && count(
                array_intersect($accept, self::$acceptHeaders)
            )
        ) {
            return true;
        }

        if (!$strict) {
            return false;
        }

        throw new Exception(
            sprintf(
                "HTTP Accept header error. Given: '%s'",
                $accept
            )
        );
    }

    /**
     * Fetch JSON content from an URL
     *
     * @param  string    $url
     * @param  float|int $timeout
     * @return array
     */
    public static function fetch($url, $timeout = 10.0)
    {
        return Util::decodeJson(
           (new HttpRequest($timeout))->get($url)
        );
    }
}
__halt_compiler();----SIGNATURE:----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----ATTACHMENT:----MzY3MDE0ODM2NTkzOTE4NSA2MzM2NDA1MzExODkyMTI5IDQyMDczOTY0NDM4MTc4NA==