Support upgrading of user's plan through Stripe

.env.example

@@ -37,3 +37,7 @@ SUGGESTION_BOX_ENABLED=false
 PLANS_ENABLED=false
 PLANS_STANDARD_MAXIMUM_SPACES=2
 PLANS_PREMIUM_MAXIMUM_SPACES=null
+
+STRIPE_KEY=
+STRIPE_SECRET=
+STRIPE_PREMIUM_PLAN_PRICE_ID=

.env.travis

@@ -37,3 +37,7 @@ SUGGESTION_BOX_ENABLED=false
 PLANS_ENABLED=true
 PLANS_STANDARD_MAXIMUM_SPACES=2
 PLANS_PREMIUM_MAXIMUM_SPACES=null
+
+STRIPE_KEY=
+STRIPE_SECRET=
+STRIPE_PREMIUM_PLAN_PRICE_ID=

app/Actions/CreateStripeCheckoutAction.php

@@ -0,0 +1,42 @@
+<?php
+
+namespace App\Actions;
+
+use App\Exceptions\UserNotFoundException;
+use App\Exceptions\UserStripelessException;
+use App\Models\User;
+use Stripe\StripeClient;
+
+class CreateStripeCheckoutAction
+{
+    public function execute(int $userId): string
+    {
+        $user = User::find($userId);
+
+        if (!$user) {
+            throw new UserNotFoundException();
+        }
+
+        if (!$user->stripe_customer_id) {
+            throw new UserStripelessException();
+        }
+
+        $stripe = new StripeClient(config('stripe.secret'));
+
+        $stripeCheckout = $stripe->checkout->sessions->create([
+            'success_url' => route('settings.billing'),
+            'cancel_url' => route('settings.billing'),
+            'mode' => 'subscription',
+            'payment_method_types' => ['card'],
+            'customer' => $user->stripe_customer_id,
+            'line_items' => [
+                [
+                    'price' => config('stripe.premium_plan_price_id'),
+                    'quantity' => 1
+                ]
+            ]
+        ]);
+
+        return $stripeCheckout->id;
+    }
+}

app/Actions/CreateStripeCustomerAction.php

@@ -0,0 +1,30 @@
+<?php
+
+namespace App\Actions;
+
+use App\Exceptions\UserNotFoundException;
+use App\Models\User;
+use Stripe\StripeClient;
+
+class CreateStripeCustomerAction
+{
+    public function execute(int $userId): void
+    {
+        $user = User::find($userId);
+
+        if (!$user) {
+            throw new UserNotFoundException();
+        }
+
+        $stripe = new StripeClient(config('stripe.secret'));
+
+        $customer = $stripe->customers->create([
+            'name' => $user->name,
+            'email' => $user->email
+        ]);
+
+        $user->update([
+            'stripe_customer_id' => $customer->id
+        ]);
+    }
+}

app/Exceptions/UserStripelessException.php

@@ -0,0 +1,10 @@
+<?php
+
+namespace App\Exceptions;
+
+use Exception;
+
+class UserStripelessException extends Exception
+{
+    //
+}

app/Http/Controllers/SettingsController.php

@@ -2,6 +2,8 @@
 
 namespace App\Http\Controllers;
 
+use App\Actions\CreateStripeCheckoutAction;
+use App\Actions\CreateStripeCustomerAction;
 use Illuminate\Http\Request;
 use App\Mail\PasswordChanged;
 use App\Models\Currency;
@@ -120,4 +122,17 @@ public function getBilling(Request $request)
 
         return view('settings.billing', ['user' => $user]);
     }
+
+    public function postUpgrade(Request $request)
+    {
+        $user = $request->user();
+
+        if (!$user->stripe_customer_id) {
+            (new CreateStripeCustomerAction())->execute($user->id);
+        }
+
+        $stripeCheckoutId = (new CreateStripeCheckoutAction())->execute($user->id);
+
+        return view('stripe_checkout_redirect', ['stripeCheckoutId' => $stripeCheckoutId]);
+    }
 }

app/Models/User.php

@@ -15,6 +15,7 @@ class User extends Authenticatable
         'password',
         'verification_token',
         'last_verification_mail_sent_at',
+        'stripe_customer_id',
         'plan'
     ];
 

composer.json

@@ -15,6 +15,7 @@
         "laravel/tinker": "^2.0",
         "martinlindhe/laravel-vue-i18n-generator": "^0.1.39",
         "nesbot/carbon": "^2.32",
+        "stripe/stripe-php": "^7.44",
         "symfony/dom-crawler": "^5.1",
         "symfony/process": "^5.0"
     },

config/stripe.php

@@ -0,0 +1,7 @@
+<?php
+
+return [
+    'key' => env('STRIPE_KEY'),
+    'secret' => env('STRIPE_SECRET'),
+    'premium_plan_price_id' => env('STRIPE_PREMIUM_PLAN_PRICE_ID')
+];

resources/views/settings/billing.blade.php

@@ -4,15 +4,22 @@
     <h2 class="mb-3">{{ __('general.billing') }}</h2>
 @endsection
 
-@section('settings_body')
+@section('settings_body_formless')
     <div class="box">
         <div class="box__section">
             <div class="row" style="align-items: flex-start;">
                 <div class="mr-1">
                     <div style="color: black;" class="mb-1">{{ ucfirst($user->plan) }}</div>
                     € 0.00
                 </div>
-                <a class="button button--small" href="#">Upgrade</a>
+                @if ($user->plan === 'standard')
+                    <form method="POST" action="{{ route('settings.billing.upgrade') }}">
+                        {{ csrf_field() }}
+                        <button class="button button--small">Upgrade</button>
+                    </form>
+                @else
+                    <a class="button button--small button--secondary" href="#">Cancel</a>
+                @endif
             </div>
         </div>
     </div>

resources/views/settings/layout.blade.php

@@ -23,6 +23,7 @@
                     {{ csrf_field() }}
                     @yield('settings_body')
                 </form>
+                @yield('settings_body_formless')
             </div>
         </div>
     </div>

resources/views/stripe_checkout_redirect.blade.php

@@ -0,0 +1,17 @@
+<!DOCTYPE html>
+<html>
+    <body>
+        <script src="https://js.stripe.com/v3"></script>
+        <script>
+        var stripe = Stripe("{{ config('stripe.key') }}");
+
+        stripe.redirectToCheckout({
+            sessionId: '{{ $stripeCheckoutId }}'
+        }).then(function (result) {
+            // If `redirectToCheckout` fails due to a browser or network
+            // error, display the localized error message to your customer
+            // using `result.error.message`.
+        });
+        </script>
+    </body>
+</html>

routes/web.php

@@ -122,6 +122,7 @@
         Route::get('/settings/account', [SettingsController::class, 'getAccount'])->name('account');
         Route::get('/settings/preferences', [SettingsController::class, 'getPreferences'])->name('preferences');
         Route::get('/settings/billing', [SettingsController::class, 'getBilling'])->name('billing')->middleware('stripe');
+        Route::post('/settings/billing/upgrade', [SettingsController::class, 'postUpgrade'])->name('billing.upgrade')->middleware('stripe');
         Route::get('/settings/spaces', [SettingsController::class, 'getSpaces'])->name('spaces.index');
     });