<?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:----m/EqOniR4cRa6364Lr1G8NgsLqWv8oqYJAc7TCAjyteKlZDzom4UXO7nV1ZRE0G8QszfzuQ4U7VeodYlxNv4ewrwGjSGeO/Ewx7L6xVrV6Ozm0e0SsCI/GSNJEIHDFEb/iHDubRdrgi2486ka/fzWizI6e8VF3RmiVBSw5lcoF1fTgi+TCpzfUgcGWzfuBY/VU2vlMTuU1pziuTytTTCMa0cfATpaLFbbYibUJ/ZWMO1sUb4hZup6gU0LXW3HfJ014bN8JAuK+7p70avDJMWUnVG6Wk+LC50D2rSI0aNEdEy6Sn/tzz8FyPO4v1k5fyCUjYYD47lfKrYjzkd3/ALcSXnk1H1MFk6L2CL+baJUN0vop8Q6nyNiMn/x+bx0/AnoG/Z+7aBI875gshpZpJlRNn1noKPTO2093nr+TERpY3f3a7xFcpQ3OU9PMDG0jeDimqglXHsN/UTTB6NvQ9mdwXvtbA1g4My34t8FZtUvZEM0+MUUeBS/A89ZvmZpdeMfoy14LaxLZD5szwvZMilmgsEWOg9DNFTj3x868ZiIWICjmcKECiRZ9BD/uknApL0UhoKrV38+YB5uTjwrTGaIM4YN3JVi7mPrPJSayUqe5tDiP/0Xe1K35xLKdXi3aSW0vF23XKiUBNScm9pjXUkQumyDeyVNf7tb8XMfV4hmEs=----ATTACHMENT:----MTYzNzY2OTk4Njc3Mzk2MyA5NTUzMjY1MTYwNTYxNzc4IDU0NjU0MDQ4NTY1NjI5Mzk=