<?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:----Mjg3MTczMTQ4ODMxODA5MSA5ODgxOTcxNzk2ODM4MDQwIDYwMzgwNjYwMDQwNjUyMjE=