<?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:----MTA5ODI5NDAxOTI3Mjk1OSA2NDMyMjg1NjU3MDc4NDc0IDYzMjA4NzU1NTYzMjIxMA==