normalize_webfinger()

Complexity

Conditions	6
Paths	3

Size

Total Lines	39
Code Lines	21

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	20
CRAP Score	6

Importance

Changes

0

<?php
function normalize_webfinger(string $input): string
{
    $hasScheme = static function (string $resource): bool {
        if (false !== strpos($resource, '://')) {
            return true;
        }

        $authority = explode('#', (string) preg_replace('/(\/|\?)/', '#', $resource))[0];

        if (false === ($index = strpos($authority, ':'))) {
            return false;
        }

        $hostOrPort = substr($resource, $index + 1);

        return ! (bool) preg_match('/^\d+$/', $hostOrPort);
    };

    $acctSchemeAssumed = static function (string $input): bool {
        if (false === strpos($input, '@')) {
            return false;
        }

        $parts = explode('@', $input);
        /** @var string $host */
        $host = array_pop($parts);

        return ! (bool) preg_match('/[:\/?]+/', $host);
    };

    if ($hasScheme($input)) {
        $output = $input;
    } elseif ($acctSchemeAssumed($input)) {
        $output = 'acct:' . $input;
    } else {
        $output = 'https://' . $input;
    }

    return explode('#', $output)[0];
}