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✏️ Editing: Transformer.php

<?php

declare(strict_types=1);

namespace TypistTech\Imposter;

use SplFileInfo;

class Transformer implements TransformerInterface
{
    /**
     * @var FilesystemInterface
     */
    private $filesystem;

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

/**
     * Transformer constructor.
     *
     * @param string              $namespacePrefix
     * @param FilesystemInterface $filesystem
     */
    public function __construct(string $namespacePrefix, FilesystemInterface $filesystem)
    {
        $this->namespacePrefix = StringUtil::ensureDoubleBackwardSlash($namespacePrefix);
        $this->filesystem = $filesystem;
    }

/**
     * Transform a file or directory recursively.
     *
     * @todo Skip non-php files.
     *
     * @param string $target Path to the target file or directory.
     *
     * @return void
     */
    public function transform(string $target)
    {
        if ($this->filesystem->isFile($target)) {
            $this->doTransform($target);

return;
        }

$files = $this->filesystem->allFiles($target);

array_walk($files, function (SplFileInfo $file) {
            $this->doTransform($file->getRealPath());
        });
    }

/**
     * @param string $targetFile
     *
     * @return void
     */
    private function doTransform(string $targetFile)
    {
        $this->prefixNamespace($targetFile);
        $this->prefixUseConst($targetFile);
        $this->prefixUseFunction($targetFile);
        $this->prefixUse($targetFile);
    }

/**
     * Prefix namespace at the given path.
     *
     * @param string $targetFile
     *
     * @return void
     */
    private function prefixNamespace(string $targetFile)
    {
        $pattern = sprintf(
            '/(\s+)%1$s\\s+(?!(%2$s)|(Composer(\\\\|;)))/',
            'namespace',
            $this->namespacePrefix
        );
        $replacement = sprintf('%1$s %2$s', '${1}namespace', $this->namespacePrefix);

$this->replace($pattern, $replacement, $targetFile);
    }

/**
     * Replace string in the given file.
     *
     * @param string $pattern
     * @param string $replacement
     * @param string $targetFile
     *
     * @return void
     */
    private function replace(string $pattern, string $replacement, string $targetFile)
    {
        $this->filesystem->put(
            $targetFile,
            preg_replace(
                $pattern,
                $replacement,
                $this->filesystem->get($targetFile)
            )
        );
    }

/**
     * Prefix `use const` keywords at the given path.
     *
     * @param string $targetFile
     *
     * @return void
     */
    private function prefixUseConst(string $targetFile)
    {
        $pattern = sprintf(
            '/%1$s\\s+(?!(%2$s)|(\\\\(?!.*\\\\.*))|(Composer(\\\\|;)|(?!.*\\\\.*)))/',
            'use const',
            $this->namespacePrefix
        );
        $replacement = sprintf('%1$s %2$s', 'use const', $this->namespacePrefix);

$this->replace($pattern, $replacement, $targetFile);
    }

/**
     * Prefix `use function` keywords at the given path.
     *
     * @param string $targetFile
     *
     * @return void
     */
    private function prefixUseFunction(string $targetFile)
    {
        $pattern = sprintf(
            '/%1$s\\s+(?!(%2$s)|(\\\\(?!.*\\\\.*))|(Composer(\\\\|;)|(?!.*\\\\.*)))/',
            'use function',
            $this->namespacePrefix
        );
        $replacement = sprintf('%1$s %2$s', 'use function', $this->namespacePrefix);

$this->replace($pattern, $replacement, $targetFile);
    }

/**
     * Prefix `use` keywords at the given path.
     *
     * @param string $targetFile
     *
     * @return void
     */
    private function prefixUse(string $targetFile)
    {
        $pattern = sprintf(
            '/%1$s\\s+(?!(const)|(function)|(%2$s)|(\\\\(?!.*\\\\.*))|(Composer(\\\\|;)|(?!.*\\\\.*)))/',
            'use',
            $this->namespacePrefix
        );
        $replacement = sprintf('%1$s %2$s', 'use', $this->namespacePrefix);

$this->replace($pattern, $replacement, $targetFile);
    }
}

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