<?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:----NjMzMTk0MTc5Nzk3OTYzOSAyNjM5NzExOTI3MzA3Mzk5IDk5MjQ3NDE0MDAxNjk4MjA=