FileUtils::normalize()

Complexity

Conditions	22
Paths	126

Size

Total Lines	104
Code Lines	63

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	33
CRAP Score	58.141

Importance

Changes	1
Bugs	0	Features	0

<?php
    public function normalize($path)
    {
        $path = (string) $path;
        $orig = $path;

        $path = str_replace(['\\', '/'], DIRECTORY_SEPARATOR, $path);

        // make sure we are dealing with an absolute path
        if (
            !StringHelper::startsWith(DIRECTORY_SEPARATOR, $path)
            && !(strlen($path) >= 2
            && Character::isLetter($path[0])
            && $path[1] === ':')
        ) {
            throw new IOException("$path is not an absolute path");
        }

        $dosWithDrive = false;
        $root = null;

        // Eliminate consecutive slashes after the drive spec

        if (strlen($path) >= 2 && Character::isLetter($path[0]) && $path[1] === ':') {
            $dosWithDrive = true;

            $ca = str_replace('/', '\\', $path);

            $path = strtoupper($ca[0]) . ':';

            for ($i = 2, $_i = strlen($ca); $i < $_i; $i++) {
                if (
                    ($ca[$i] !== '\\')
                    || ($ca[$i] === '\\'
                    && $ca[$i - 1] !== '\\')
                ) {
                    $path .= $ca[$i];
                }
            }

            $path = str_replace('\\', DIRECTORY_SEPARATOR, $path);

            if (strlen($path) == 2) {
                $root = $path;
                $path = "";
            } else {
                $root = substr($path, 0, 3);
                $path = substr($path, 3);
            }
        } else {
            if (strlen($path) == 1) {
                $root = DIRECTORY_SEPARATOR;
                $path = "";
            } else {
                if ($path[1] == DIRECTORY_SEPARATOR) {
                    // UNC drive
                    $root = DIRECTORY_SEPARATOR . DIRECTORY_SEPARATOR;
                    $path = substr($path, 2);
                } else {
                    $root = DIRECTORY_SEPARATOR;
                    $path = substr($path, 1);
                }
            }
        }

        $s = [];
        $s[] = $root;
        $tok = strtok($path, DIRECTORY_SEPARATOR);
        while ($tok !== false) {
            $thisToken = $tok;
            if ("." === $thisToken) {
                $tok = strtok(DIRECTORY_SEPARATOR);
                continue;
            }

            if (".." === $thisToken) {
                if (count($s) < 2) {
                    // using '..' in path that is too short
                    throw new IOException("Cannot resolve path: $orig");
                }

                array_pop($s);
            } else { // plain component
                $s[] = $thisToken;
            }
            $tok = strtok(DIRECTORY_SEPARATOR);
        }

        $sb = "";
        for ($i = 0, $_i = count($s); $i < $_i; $i++) {
            if ($i > 1) {
                // not before the filesystem root and not after it, since root
                // already contains one
                $sb .= DIRECTORY_SEPARATOR;
            }
            $sb .= (string) $s[$i];
        }


        $path = (string) $sb;
        if ($dosWithDrive === true) {
            $path = str_replace('/', '\\', $path);
        }

        return $path;
    }