Get translatable strings (__, @lang) for Laravel folders

ExtractTranslatableStringsCommand.php

<?php

namespace App\Console\Commands;

use Illuminate\Console\Command;
use Illuminate\Support\Arr;
use Illuminate\Support\Collection;
use Illuminate\Support\Str;
use Illuminate\Support\Facades\File;
use SplFileInfo;

class ExtractTranslatableStringsCommand extends Command
{
    protected $signature = 'translatable:extract {--e|--export=en}';
    protected $description = 'Extract Translatable Strings';
    protected $allowedExtensions = ['.php', '.vue', '.js'];
    protected $includedFolders = ['app', 'resources'];
    protected $methods = [
        '__', '@lang'
    ];

    public function __construct()
    {
        parent::__construct();
    }

    public function handle()
    {
        $regex = '/(?:' . implode('|', $this->methods) . ')\((?<quotation>["\'])(?<string>(?:\\\\\k<quotation>|.)*?)\k<quotation>[^\)]*\)/i';

        $results = Collection::make($this->includedFolders)
            ->map(function ($folder) {
                return File::allFiles(trim($folder));
            })
            ->flatten()
            ->filter(function (SplFileInfo $file) {
                return Str::endsWith($file->getPathname(), $this->allowedExtensions);
            })
            ->map(function (SplFileInfo $file) use ($regex) {
                preg_match_all($regex, file_get_contents($file->getRealPath()), $matches, PREG_SET_ORDER, 0);
                return Arr::pluck($matches, 'string');
            })
            ->flatten()
            ->unique()
            ->toArray();

        $results = json_encode(
            array_combine($results, $results),
            JSON_PRETTY_PRINT
        );

        $export = $this->option('export');

        $overwrite = true;
        if (file_exists(resource_path('lang/' . $export . '.json'))) {
            $overwrite = $this->ask('`lang/' . $export . '.json` already exists! Would you like to overwrite the file?');
        }

        if($overwrite) {
            file_put_contents(resource_path('lang/' . $export . '.json'), $results);
            $this->info('Exporting to `lang/' . $export . '.json` is complete...');
        } else {
            $this->info('Aborted!');
        }

    }
}