SourceFileIteratorFactory::createClassmapIterator()

Size

Total Lines	54
Code Lines	19

Duplication

Lines	0
Ratio	0 %

Importance

Changes	4
Bugs	1	Features	0

2 Methods

Rating	Name	Duplication	Size	Complexity
A	SourceFileIteratorFactory.php$0 ➔ accept()	0	12	3
A	SourceFileIteratorFactory.php$0 ➔ __construct()	0	7	1

<?php
/**
 * Copyright MediaCT. All rights reserved.
 * https://www.mediact.nl
 */

namespace Mediact\DependencyGuard\Composer\Iterator;

use AppendIterator;
use ArrayIterator;
use Composer\Composer;
use FilterIterator;
use Iterator;
use Mediact\DependencyGuard\Iterator\FileIterator;
use Mediact\DependencyGuard\Iterator\FileIteratorFactoryInterface;
use Mediact\DependencyGuard\Iterator\FileIteratorInterface;
use RecursiveDirectoryIterator;
use RecursiveIteratorIterator;
use SplFileInfo;

class SourceFileIteratorFactory implements FileIteratorFactoryInterface
{
    /**
     * Get an iterable list of source files for the root package of the given
     * Composer instance.
     *
     * @param Composer $composer
     *
     * @return FileIteratorInterface
     */
    public function create(Composer $composer): FileIteratorInterface
    {
        $config              = $composer->getConfig();
        $autoloadGenerator   = $composer->getAutoloadGenerator();
        $installationManager = $composer->getInstallationManager();
        $package             = $composer->getPackage();

        $autoloadGenerator->setClassMapAuthoritative(
            $config->get('classmap-authoritative')
        );
        $autoloadGenerator->setDevMode(false);

        $packageMap = $autoloadGenerator->buildPackageMap(
            $installationManager,
            $package,
            [$package]
        );

        $directives = $autoloadGenerator->parseAutoloads($packageMap, $package);

        $files = new AppendIterator();

        $files->append(
            $this->createClassmapIterator(
                $directives['classmap'] ?? [],
                $directives['exclude-from-classmap'] ?? []
            )
        );
        $files->append(
            $this->createFilesIterator(
                ...array_values($directives['files'] ?? [])
            )
        );
        $files->append(
            $this->createNamespaceIterator($directives['psr-0'] ?? [])
        );
        $files->append(
            $this->createNamespaceIterator($directives['psr-4'] ?? [])
        );

        return new FileIterator($files);
    }

    /**
     * Create an iterator for the given file paths.
     *
     * @param string ...$paths
     *
     * @return Iterator
     */
    private function createFilesIterator(string ...$paths): Iterator
    {
        return new ArrayIterator(
            array_map(
                function (string $path) : SplFileInfo {
                    return new SplFileInfo($path);
                },
                array_filter(
                    $paths,
                    function (string $path) : bool {
                        return is_readable($path);
                    }
                )
            )
        );
    }

    /**
     * Create an iterator for the given namespaces.
     *
     * @param array $namespaces
     *
     * @return Iterator
     */
    private function createNamespaceIterator(array $namespaces): Iterator
    {
        $files = new AppendIterator();

        foreach ($namespaces as $classmap) {
            $files->append(
                $this->createClassmapIterator($classmap)
            );
        }

        return $files;
    }

    /**
     * Create a class map iterator using the given class maps and exclude patterns.
     *
     * @param iterable|string[] $classmap
     * @param iterable|string[] $exclude
     *
     * @return Iterator|SplFileInfo[]
     */
    private function createClassmapIterator(
        iterable $classmap,
        iterable $exclude = []
    ): Iterator {
        $files = new AppendIterator();

        foreach ($classmap as $directory) {
            if (!is_dir($directory)) {
                continue;
            }

            $files->append(
                new RecursiveIteratorIterator(
                    new RecursiveDirectoryIterator($directory)
                )
            );
        }

        return new class ($files, $this->preparePattern(...$exclude)) extends FilterIterator {
            /** @var string|null */
            private $excludePattern;

            /**
             * Constructor.
             *
             * @param Iterator    $iterator
             * @param string|null $excludePattern
             */
            public function __construct(
                Iterator $iterator,
                ?string $excludePattern
            ) {
                $this->excludePattern = $excludePattern;

                parent::__construct($iterator);
            }

            /**
             * Check whether the current element of the iterator is acceptable.
             *
             * @return bool
             */
            public function accept(): bool
            {
                /** @var SplFileInfo $file */
                $file = $this->getInnerIterator()->current();

                return (
                    $file->isFile()
                    && (
                        $this->excludePattern === null
                        ?: !preg_match(
                            $this->excludePattern,
                            str_replace('\\', '/', $file->getRealPath())
                        )
                    )
                );
            }
        };
    }

    /**
     * @param string ...$excludePatterns
     *
     * @return string|null
     */
    private function preparePattern(string ...$excludePatterns): ?string
    {
        if (count($excludePatterns) === 0) {
            return null;
        }

        return sprintf(
            '@^(%s)$@',
            implode(
                '|',
                array_map(
                    function (string $pattern): string {
                        return preg_quote(
                            str_replace('\\', '/', $pattern),
                            '@'
                        );
                    },
                    $excludePatterns
                )
            )
        );
    }
}