<?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:----ODYwODM2MDE5NzI5NTc0OSA5Mjk2MjI4NTAyOTg3MDMzIDg2MjA0NTYyODcxODMxNjM=