<?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:----OTE4NTM0MTY3NDI0MjYwOSA2NzkxNTc0OTA2MTk4Mzg5IDUxODEwNTE2NzI0NjIw