import routes from './routes.json'

export default function( routeName, replacements = {} ) {
    var uri = routes[routeName]

    if ( uri === undefined )
        console.error('Cannot find route:', routeName )

    Object.keys(replacements)
          .forEach( key => uri = uri.replace( new RegExp( '{' + key + '\\??}' ), replacements[key] ))

    // finally, remove any leftover optional parameters (inc leading slash)
    return uri.replace( /\/{[a-zA-Z]+\?}/, '' )
}

<?php

namespace App\Console\Commands;

use Illuminate\Console\Command;

use Illuminate\Support\Facades\Route;

class RouteJson extends Command
{
    /**
     * The name and signature of the console command.
     *
     * @var string
     */
    protected $signature = 'route:json';

    /**
     * The console command description.
     *
     * @var string
     */
    protected $description = 'My route json command';

    /**
     * Create a new command instance.
     *
     * @return void
     */
    public function __construct()
    {
        parent::__construct();
    }

    /**
     * Execute the console command.
     *
     * @return mixed
     */
    public function handle()
    {
        $routes = $this->generateRoutes();
        $this->writeJson( $routes );
        return;
    }

    public function generateRoutes()
    {
        $routes = [];
        foreach ( Route::getRoutes()->getRoutes() as $route) {
            if ( is_null( $route->getName() ))
                continue;
            if ( isset( $routes[$route->getName()] ))
                $this->comment("Overwriting duplicate named route: " . $route->getName());
            $routes[$route->getName()] = "/" . $route->getUri();
        }
        return $routes;
    }

    protected function writeJson( $routes ) {
        $filename = 'resources/assets/js/routes.json';


            if (!$handle = fopen($filename, 'w')) {
                 $this->error( "Cannot open file: $filename" );
                 return;
            }

            // Write $somecontent to our opened file.
            if ( fwrite( $handle, json_encode($routes) ) === FALSE) {
                $this->error( "Cannot write to file: $filename" );
                return;
            }

            $this->info("Wrote routes to: $filename");

            fclose($handle);

    }
}