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pixelfed/app/Util/Lexer/Bearcap.php

58 lines
936 B
PHP

<?php
namespace App\Util\Lexer;
use Illuminate\Support\Str;
use App\Util\ActivityPub\Helpers;
class Bearcap
{
public static function encode($url, $token)
{
return "bear:?t={$token}&u={$url}";
}
public static function decode($str)
{
if(!Str::startsWith($str, 'bear:')) {
return false;
}
$query = parse_url($str, PHP_URL_QUERY);
if(!$query) {
return false;
}
$res = [];
$parts = Str::of($str)->substr(6)->explode('&')->toArray();
foreach($parts as $part) {
if(Str::startsWith($part, 't=')) {
$res['token'] = substr($part, 2);
}
if(Str::startsWith($part, 'u=')) {
$res['url'] = substr($part, 2);
}
}
if( !isset($res['token']) ||
!isset($res['url'])
) {
return false;
}
$url = $res['url'];
if(mb_substr($url, 0, 8) !== 'https://') {
return false;
}
$valid = filter_var($url, FILTER_VALIDATE_URL);
if(!$valid) {
return false;
}
return $res;
}
}