<?php declare(strict_types=1);
/*
 * This file is part of phpunit/php-code-coverage.
 *
 * (c) Sebastian Bergmann <sebastian@phpunit.de>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */
namespace SebastianBergmann\CodeCoverage\StaticAnalysis;

use function file_get_contents;
use function file_put_contents;
use function implode;
use function is_file;
use function md5;
use function serialize;
use function unserialize;
use SebastianBergmann\CodeCoverage\Util\Filesystem;
use SebastianBergmann\FileIterator\Facade as FileIteratorFacade;

/**
 * @internal This class is not covered by the backward compatibility promise for phpunit/php-code-coverage
 */
final class CachingFileAnalyser implements FileAnalyser
{
    /**
     * @var ?string
     */
    private static $cacheVersion;

    /**
     * @var string
     */
    private $directory;

    /**
     * @var FileAnalyser
     */
    private $analyser;

    /**
     * @var bool
     */
    private $useAnnotationsForIgnoringCode;

    /**
     * @var bool
     */
    private $ignoreDeprecatedCode;

    /**
     * @var array
     */
    private $cache = [];

    public function __construct(string $directory, FileAnalyser $analyser, bool $useAnnotationsForIgnoringCode, bool $ignoreDeprecatedCode)
    {
        Filesystem::createDirectory($directory);

        $this->analyser                      = $analyser;
        $this->directory                     = $directory;
        $this->useAnnotationsForIgnoringCode = $useAnnotationsForIgnoringCode;
        $this->ignoreDeprecatedCode          = $ignoreDeprecatedCode;
    }

    public function classesIn(string $filename): array
    {
        if (!isset($this->cache[$filename])) {
            $this->process($filename);
        }

        return $this->cache[$filename]['classesIn'];
    }

    public function traitsIn(string $filename): array
    {
        if (!isset($this->cache[$filename])) {
            $this->process($filename);
        }

        return $this->cache[$filename]['traitsIn'];
    }

    public function functionsIn(string $filename): array
    {
        if (!isset($this->cache[$filename])) {
            $this->process($filename);
        }

        return $this->cache[$filename]['functionsIn'];
    }

    /**
     * @psalm-return array{linesOfCode: int, commentLinesOfCode: int, nonCommentLinesOfCode: int}
     */
    public function linesOfCodeFor(string $filename): array
    {
        if (!isset($this->cache[$filename])) {
            $this->process($filename);
        }

        return $this->cache[$filename]['linesOfCodeFor'];
    }

    public function executableLinesIn(string $filename): array
    {
        if (!isset($this->cache[$filename])) {
            $this->process($filename);
        }

        return $this->cache[$filename]['executableLinesIn'];
    }

    public function ignoredLinesFor(string $filename): array
    {
        if (!isset($this->cache[$filename])) {
            $this->process($filename);
        }

        return $this->cache[$filename]['ignoredLinesFor'];
    }

    public function process(string $filename): void
    {
        $cache = $this->read($filename);

        if ($cache !== false) {
            $this->cache[$filename] = $cache;

            return;
        }

        $this->cache[$filename] = [
            'classesIn'         => $this->analyser->classesIn($filename),
            'traitsIn'          => $this->analyser->traitsIn($filename),
            'functionsIn'       => $this->analyser->functionsIn($filename),
            'linesOfCodeFor'    => $this->analyser->linesOfCodeFor($filename),
            'ignoredLinesFor'   => $this->analyser->ignoredLinesFor($filename),
            'executableLinesIn' => $this->analyser->executableLinesIn($filename),
        ];

        $this->write($filename, $this->cache[$filename]);
    }

    /**
     * @return mixed
     */
    private function read(string $filename)
    {
        $cacheFile = $this->cacheFile($filename);

        if (!is_file($cacheFile)) {
            return false;
        }

        return unserialize(
            file_get_contents($cacheFile),
            ['allowed_classes' => false]
        );
    }

    /**
     * @param mixed $data
     */
    private function write(string $filename, $data): void
    {
        file_put_contents(
            $this->cacheFile($filename),
            serialize($data)
        );
    }

    private function cacheFile(string $filename): string
    {
        $cacheKey = md5(
            implode(
                "\0",
                [
                    $filename,
                    file_get_contents($filename),
                    self::cacheVersion(),
                    $this->useAnnotationsForIgnoringCode,
                    $this->ignoreDeprecatedCode,
                ]
            )
        );

        return $this->directory . DIRECTORY_SEPARATOR . $cacheKey;
    }

    private static function cacheVersion(): string
    {
        if (self::$cacheVersion !== null) {
            return self::$cacheVersion;
        }

        $buffer = [];

        foreach ((new FileIteratorFacade)->getFilesAsArray(__DIR__, '.php') as $file) {
            $buffer[] = $file;
            $buffer[] = file_get_contents($file);
        }

        self::$cacheVersion = md5(implode("\0", $buffer));

        return self::$cacheVersion;
    }
}

• [F] CacheWarmer.php
  Delete
• [F] CachingFileAnalyser.php
  Delete
• [F] CodeUnitFindingVisitor.php
  Delete
• [F] ExecutableLinesFindingVisitor.php
  Delete
• [F] FileAnalyser.php
  Delete
• [F] IgnoredLinesFindingVisitor.php
  Delete
• [F] ParsingFileAnalyser.php
  Delete

Blog Section

Discover the Latest in Digital Payments and NFC Technology

Dive into our blog to explore the cutting-edge trends in digital payments and NFC technology. Stay updated on the innovations that are revolutionizing transactions, boosting security, and making payments quicker and more convenient. Learn how these advancements are shaping the future of financial interactions and driving the global transition towards a cashless world.

The Rise of Contactless Payments:...

In recent years, contactless payments have surged in popularity, driven...

Visit Blog

March 27, 2024

Enhancing Payment Security: The Role...

As digital transactions proliferate, ensuring robust payment security is more critical than ever. Two foundational...

Visit Blog

March 27, 2024

The Future of Digital Wallets:...

Digital wallets have fundamentally transformed how we manage money, offering a streamlined, secure, and highly...

Visit Blog

March 27, 2024