AdminBundle\Service\TwineImport\FileCheck::check()

Complexity

Conditions	11
Paths	8

Size

Total Lines	41
Code Lines	21

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	20
CRAP Score	11.0908

Importance

Changes

0

<?php
    public function check(FileHandler $fileHandler, string $filename): bool
    {
        $magicStringLength = strlen(self::OPENING_STRING);

        $peekData = $fileHandler->read(1024);

        if (false === $peekData) {

The condition false === $peekData is always false.

            throw new \Exception(sprintf("Failed to read data from file '%s'.", $filename));
        }

        $peekDataLength = strlen($peekData);

        if ($peekDataLength <= 0) {
            throw new \Exception(sprintf("File '%s' seems to be empty.", $filename));
        }

        for ($i = 0; $i < $peekDataLength; ++$i) {
            if ($peekData[$i] === ' ' ||
                $peekData[$i] === "\n" ||
                $peekData[$i] === "\r" ||
                $peekData[$i] === "\t") {
                // Consume whitespace.
                continue;
            }

            if ($peekDataLength - $i < $magicStringLength) {
                throw new \Exception(sprintf("File '%s' isn't a Twine archive file.", $filename));
            }

            if (substr($peekData, $i, $magicStringLength) !== self::OPENING_STRING) {
                throw new \Exception(sprintf("File '%s' isn't a Twine archive file.", $filename));
            }

            if ($fileHandler->seek(0) !== 0) {
                throw new \Exception(sprintf("Couldn't reset reading position after the magic string in the Twine archive file '%s' was checked.", $filename));
            }

            return true;
        }

        throw new \Exception(sprintf("File '%s' doesn't seem to be a Twine archive file.", $filename));
    }