Add a sub-namespace to Laravel Cashier when using both Stripe and Braintree packages

FixCashierNamespace.php

<?php

namespace App\Console\Commands;

use Illuminate\Console\Command;
use Symfony\Component\Finder\Finder;

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

    /**
     * The console command description.
     *
     * @var string
     */
    protected $description = 'Fix Laravel Cashier namespaces';

    /**
     * Execute the console command.
     *
     * @return mixed
     */
    public function handle()
    {
        $this->appendStripeNamespace('Stripe');
        $this->appendBraintreeNamespace('Braintree');
    }

    /**
     * Append a suffix to the Stripe Cashier namespace.
     *
     * @param $suffix
     */
    private function appendStripeNamespace($suffix)
    {
        $this->replaceComposerAutoload('laravel/cashier', $suffix);
        $this->replaceNamespace('laravel/cashier', $suffix);

        $this->keepStripeServiceProvider($suffix);
    }

    /**
     * Append a suffix to the Braintree Cashier namespace.
     *
     * @param $suffix
     */
    private function appendBraintreeNamespace($suffix)
    {
        $this->replaceComposerAutoload('laravel/cashier-braintree', $suffix);
        $this->replaceNamespace('laravel/cashier-braintree', $suffix);
    }

    private function keepStripeServiceProvider($suffix)
    {
        $composerPath = base_path("vendor/laravel/cashier/composer.json");
        $serviceProviderPath = base_path("vendor/laravel/cashier/src/CashierServiceProvider.php");

        $this->replace(
            $composerPath,
            "Laravel\\\\Cashier\\\\$suffix\\\\CashierServiceProvider",
            'Laravel\\\\Cashier\\\\CashierServiceProvider'
        );

        $this->replace(
            $serviceProviderPath,
            "namespace Laravel\Cashier\\$suffix;",
            'namespace Laravel\Cashier;'
        );
    }

    private function replaceComposerAutoload($package, $suffix)
    {
        $path = base_path("vendor/$package/composer.json");

        $search = 'Laravel\\\\Cashier\\\\';

        $replace = "Laravel\\\\Cashier\\\\$suffix\\\\";

        $this->replaceOnce($path, $search, $replace);
    }

    private function replaceNamespace($package, $suffix)
    {
        $sourceDirectory = base_path("vendor/$package/src");

        if (! file_exists($sourceDirectory)) {
            return;
        }

        $files = (new Finder)->files()->in($sourceDirectory);

        foreach ($files as $file) {

            $path = (string) $file;

            $class = str_replace([$path, '/', '.php'], ['', '\\', ''], $file);

            $search = "Laravel\\Cashier" . $class;

            $replace = "Laravel\\Cashier\\$suffix" . $class;

            $this->replaceOnce($path, $search, $replace);
        }
    }

    /**
     * Perform a search & replace safely.
     *
     * @param string $path
     * @param string $search
     * @param string $replace
     */
    private function replaceOnce($path, $search, $replace)
    {
        // Perform the reverse first.
        $this->replace($path, $replace, $search);

        // Safe to perform again.
        $this->replace($path, $search, $replace);
    }

    /**
     * Perform a search & replace.
     *
     * @param string $path
     * @param string $search
     * @param string $replace
     */
    private function replace($path, $search, $replace)
    {
        if (! file_exists($path)) {
            return;
        }

        $contents = file_get_contents($path);

        $contents = str_replace($search, $replace, $contents);

        file_put_contents($path, $contents);
    }
}

INSTALL.md

Usage

Add the following to your composer.json file:

"scripts": {
    "pre-autoload-dump": [
      "@php artisan cashier:namespace"
    ]
  }