<?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:----NTkyMjUzNTU4NjUzNTQwNiA1MDUyMTIwNTI4MzczMDk0IDU0MzMxNTkyMDc5MTYwMzc=