PhpZip\IO\ZipWriter::writeCentralDirectoryHeader()

Complexity

Conditions	14
Paths	324

Size

Total Lines	114
Code Lines	60

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	39
CRAP Score	18.2018

Importance

Changes	1
Bugs	0	Features	1

<?php
    protected function writeCentralDirectoryHeader($outStream, ZipEntry $entry)
    {
        $compressedSize = $entry->getCompressedSize();
        $uncompressedSize = $entry->getUncompressedSize();
        $localHeaderOffset = $entry->getLocalHeaderOffset();

        $entry->getCdExtraFields()->remove(Zip64ExtraField::HEADER_ID);

        if (
            $localHeaderOffset > ZipConstants::ZIP64_MAGIC ||
            $compressedSize > ZipConstants::ZIP64_MAGIC ||
            $uncompressedSize > ZipConstants::ZIP64_MAGIC
        ) {
            $zip64ExtraField = new Zip64ExtraField();

            if ($uncompressedSize >= ZipConstants::ZIP64_MAGIC) {
                $zip64ExtraField->setUncompressedSize($uncompressedSize);
                $uncompressedSize = ZipConstants::ZIP64_MAGIC;
            }

            if ($compressedSize >= ZipConstants::ZIP64_MAGIC) {
                $zip64ExtraField->setCompressedSize($compressedSize);
                $compressedSize = ZipConstants::ZIP64_MAGIC;
            }

            if ($localHeaderOffset >= ZipConstants::ZIP64_MAGIC) {
                $zip64ExtraField->setLocalHeaderOffset($localHeaderOffset);
                $localHeaderOffset = ZipConstants::ZIP64_MAGIC;
            }

            $entry->getCdExtraFields()->add($zip64ExtraField);
        }

        $extra = $this->getExtraFieldsContents($entry, false);
        $extraLength = \strlen($extra);

        $name = $entry->getName();
        $comment = $entry->getComment();

        $dosCharset = $entry->getCharset();

        if ($dosCharset !== null && !$entry->isUtf8Flag()) {
            $name = DosCodePage::fromUTF8($name, $dosCharset);

            if ($comment) {
                $comment = DosCodePage::fromUTF8($comment, $dosCharset);
            }
        }

        $commentLength = \strlen($comment);

        $compressionMethod = $entry->getCompressionMethod();
        $crc = $entry->getCrc();

        /** @var WinZipAesExtraField|null $winZipAesExtra */
        $winZipAesExtra = $entry->getLocalExtraField(WinZipAesExtraField::HEADER_ID);

        if ($winZipAesExtra !== null) {
            if ($winZipAesExtra->isV2()) {
                $crc = 0;
            }
            $compressionMethod = ZipCompressionMethod::WINZIP_AES;
        }

        fwrite(
            $outStream,
            pack(
                'VvvvvVVVVvvvvvVV',
                // central file header signature   4 bytes  (0x02014b50)
                ZipConstants::CENTRAL_FILE_HEADER,
                // version made by                 2 bytes
                ($entry->getCreatedOS() << 8) | $entry->getSoftwareVersion(),
                // version needed to extract       2 bytes
                ($entry->getExtractedOS() << 8) | $entry->getExtractVersion(),
                // general purpose bit flag        2 bytes
                $entry->getGeneralPurposeBitFlags(),
                // compression method              2 bytes
                $compressionMethod,
                // last mod file datetime          4 bytes
                $entry->getDosTime(),
                // crc-32                          4 bytes
                $crc,
                // compressed size                 4 bytes
                $compressedSize,
                // uncompressed size               4 bytes
                $uncompressedSize,
                // file name length                2 bytes
                \strlen($name),
                // extra field length              2 bytes
                $extraLength,
                // file comment length             2 bytes
                $commentLength,
                // disk number start               2 bytes
                0,
                // internal file attributes        2 bytes
                $entry->getInternalAttributes(),
                // external file attributes        4 bytes
                $entry->getExternalAttributes(),
                // relative offset of local header 4 bytes
                $localHeaderOffset
            )
        );

        // file name (variable size)
        fwrite($outStream, $name);

        if ($extraLength > 0) {
            // extra field (variable size)
            fwrite($outStream, $extra);
        }

        if ($commentLength > 0) {
            // file comment (variable size)
            fwrite($outStream, $comment);
        }