File Preview.php has 665 lines of code (exceeds 250 allowed). Consider refactoring.

Open

<?php
/**
 * @author Björn Schießle <bjoern@schiessle.org>
 * @author Frank Karlitschek <frank@karlitschek.de>
 * @author Georg Ehrke <georg@owncloud.com>

Preview has 45 functions (exceeds 20 allowed). Consider refactoring.

Open

class Preview {
    //the thumbnail folder
    public const THUMBNAILS_FOLDER = 'thumbnails';

    public const MODE_FILL = 'fill';

Function generatePreview has a Cognitive Complexity of 22 (exceeds 5 allowed). Consider refactoring.

Open

    private function generatePreview() {
        $file = $this->getFile();
        $preview = null;

        $previewProviders = \OC::$server->getPreviewManager()

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Function getPreview has a Cognitive Complexity of 22 (exceeds 5 allowed). Consider refactoring.

Open

    public function getPreview() {
        if ($this->preview !== null && $this->preview->valid()) {
            return $this->preview;
        }

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Method resizeAndStore has 49 lines of code (exceeds 25 allowed). Consider refactoring.

Open

    private function resizeAndStore() {
        $image = $this->preview;
        if (!($image instanceof IImage)) {
            Util::writeLog(
                'core',

Function deletePreview has a Cognitive Complexity of 15 (exceeds 5 allowed). Consider refactoring.

Open

    public function deletePreview($keepMax = true) {
        $fileInfo = $this->getFile();
        if ($fileInfo !== null && $fileInfo !== false) {
            if ($keepMax === true) {
                $previewPath = $this->buildCachePath();

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Method generatePreview has 38 lines of code (exceeds 25 allowed). Consider refactoring.

Open

    private function generatePreview() {
        $file = $this->getFile();
        $preview = null;

        $previewProviders = \OC::$server->getPreviewManager()

Method getPreview has 35 lines of code (exceeds 25 allowed). Consider refactoring.

Open

    public function getPreview() {
        if ($this->preview !== null && $this->preview->valid()) {
            return $this->preview;
        }

Function isCached has a Cognitive Complexity of 11 (exceeds 5 allowed). Consider refactoring.

Open

    public function isCached() {
        $fileId = $this->getFile()->getId();
        if ($fileId === null) {
            return false;
        }

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Method cropAndFill has 30 lines of code (exceeds 25 allowed). Consider refactoring.

Open

    private function cropAndFill($image, $askedWidth, $askedHeight, $previewWidth, $previewHeight) {
        if ($previewWidth > $askedWidth) {
            $cropX = \floor(($previewWidth - $askedWidth) * 0.5);
            $image->crop($cropX, 0, $askedWidth, $previewHeight);
            $previewWidth = $askedWidth;

Method scale has 29 lines of code (exceeds 25 allowed). Consider refactoring.

Open

    private function scale($image, $askedWidth, $askedHeight, $previewWidth, $previewHeight) {
        $scalingUp = $this->getScalingUp();
        $maxScaleFactor = $this->getMaxScaleFactor();

        $factorX = $askedWidth / $previewWidth;

Method isCached has 28 lines of code (exceeds 25 allowed). Consider refactoring.

Open

    public function isCached() {
        $fileId = $this->getFile()->getId();
        if ($fileId === null) {
            return false;
        }

Method __construct has 7 arguments (exceeds 4 allowed). Consider refactoring.

Open

        $user = '',
        $root = '/',
        Node $file = null,
        $maxX = 1,
        $maxY = 1,

Function unscalable has a Cognitive Complexity of 8 (exceeds 5 allowed). Consider refactoring.

Open

    private function unscalable($x, $y) {
        $maxX = $this->getMaxX();
        $maxY = $this->getMaxY();
        $scalingUp = $this->getScalingUp();
        $maxScaleFactor = $this->getMaxScaleFactor();

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Function resizeAndStore has a Cognitive Complexity of 8 (exceeds 5 allowed). Consider refactoring.

Open

    private function resizeAndStore() {
        $image = $this->preview;
        if (!($image instanceof IImage)) {
            Util::writeLog(
                'core',

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Function scale has a Cognitive Complexity of 8 (exceeds 5 allowed). Consider refactoring.

Open

    private function scale($image, $askedWidth, $askedHeight, $previewWidth, $previewHeight) {
        $scalingUp = $this->getScalingUp();
        $maxScaleFactor = $this->getMaxScaleFactor();

        $factorX = $askedWidth / $previewWidth;

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Method crop has 5 arguments (exceeds 4 allowed). Consider refactoring.

Open

    private function crop($image, $askedWidth, $askedHeight, $previewWidth, $previewHeight = null) {

Method cropAndFill has 5 arguments (exceeds 4 allowed). Consider refactoring.

Open

    private function cropAndFill($image, $askedWidth, $askedHeight, $previewWidth, $previewHeight) {

Method scale has 5 arguments (exceeds 4 allowed). Consider refactoring.

Open

    private function scale($image, $askedWidth, $askedHeight, $previewWidth, $previewHeight) {

Function getCachedPreview has a Cognitive Complexity of 7 (exceeds 5 allowed). Consider refactoring.

Open

    private function getCachedPreview($cached) {
        $stream = $this->userView->fopen($cached, 'r');
        $this->preview = null;
        if ($stream) {
            $image = new \OC_Image();

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Function getPossibleThumbnails has a Cognitive Complexity of 7 (exceeds 5 allowed). Consider refactoring.

Open

    private function getPossibleThumbnails($allThumbnails) {
        if ($this->keepAspect) {
            $wantedAspectRatio = (float)($this->maxPreviewWidth / $this->maxPreviewHeight);
        } else {
            $wantedAspectRatio = (float)($this->getMaxX() / $this->getMaxY());

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Avoid too many return statements within this method.

Open

        return false;

Avoid too many return statements within this method.

Open

            return $this->isCachedBigger($allThumbnails);

Function showPreview has a Cognitive Complexity of 6 (exceeds 5 allowed). Consider refactoring.

Open

    public function showPreview($mimeTypeForHeaders = null) {
        // Check if file is valid
        if ($this->isFileValid() === false) {
            throw new NotFoundException('File not found.');
        }

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Function buildCachePath has a Cognitive Complexity of 6 (exceeds 5 allowed). Consider refactoring.

Open

    private function buildCachePath($maxX = null, $maxY = null) {
        if ($maxX === null) {
            $maxX = $this->getMaxX();
        }
        if ($maxY === null) {

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