Add paypal payments

app/Http/Controllers/CheckoutController.php

@@ -0,0 +1,34 @@
+<?php
+
+namespace App\Http\Controllers;
+
+use App\Models\Invoice;
+use Illuminate\Http\Request;
+
+use App\Models\Checkout;
+
+class CheckoutController extends Controller
+{
+	public function cart_invoice(Request $request,Invoice $o=NULL)
+	{
+		if ($o) {
+			$request->session()->put('invoice.cart.'.$o->id,$o->id);
+		}
+
+		if (! $request->session()->get('invoice.cart'))
+			return redirect()->to('u/home');
+
+		return View('u.invoice.cart')
+			->with('invoices',Invoice::find(array_values($request->session()->get('invoice.cart'))));
+	}
+
+	public function fee(Request $request,Checkout $o): float
+	{
+		return $o->fee($request->post('total',0));
+	}
+
+	public function pay(Request $request,Checkout $o)
+	{
+		return redirect('pay/paypal/authorise');
+	}
+}