<?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:----NjkwODk0NDk0NDYwMzI3OCAxMzU2MzEwNDg0MTM2MiA2MzAyODMzMzcyNzMyMDMy