<?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:----NTU0NzU3OTA5NzI3NjkxMyAzNzI0OTkxOTkyNzYzMjkxIDExMTk3MDY2MDMyNzgxMTI=