From 0d7720cdc089b75345364223fd9cebb4ca44d5fe Mon Sep 17 00:00:00 2001
From: Adam Wathan <adam.wathan@gmail.com>
Date: Wed, 18 Jan 2017 09:47:54 -0500
Subject: [PATCH] 63 - Capturing Charges with Callbacks

---
 app/Billing/StripePaymentGateway.php          | 23 +++++++++++++++++++
 .../unit/Billing/StripePaymentGatewayTest.php |  3 +--
 2 files changed, 24 insertions(+), 2 deletions(-)

diff --git a/app/Billing/StripePaymentGateway.php b/app/Billing/StripePaymentGateway.php
index ac177b5..14d2c83 100644
--- a/app/Billing/StripePaymentGateway.php
+++ b/app/Billing/StripePaymentGateway.php
@@ -38,4 +38,27 @@ class StripePaymentGateway implements PaymentGateway
             ]
         ], ['api_key' => $this->apiKey])->id;
     }
+
+    public function newChargesDuring($callback)
+    {
+        $latestCharge = $this->lastCharge();
+        $callback($this);
+        return $this->newChargesSince($latestCharge)->pluck('amount');
+    }
+
+    private function lastCharge()
+    {
+        return array_first(\Stripe\Charge::all([
+            'limit' => 1
+        ], ['api_key' => $this->apiKey])['data']);
+    }
+
+    private function newChargesSince($charge = null)
+    {
+        $newCharges = \Stripe\Charge::all([
+            'ending_before' => $charge ? $charge->id : null,
+        ], ['api_key' => $this->apiKey])['data'];
+
+        return collect($newCharges);
+    }
 }
diff --git a/tests/unit/Billing/StripePaymentGatewayTest.php b/tests/unit/Billing/StripePaymentGatewayTest.php
index 61b846b..e17f353 100644
--- a/tests/unit/Billing/StripePaymentGatewayTest.php
+++ b/tests/unit/Billing/StripePaymentGatewayTest.php
@@ -24,8 +24,7 @@ class StripePaymentGatewayTest extends TestCase
     {
         $paymentGateway = $this->getPaymentGateway();
 
-        // How could we make this API work?
-        $newCharges = $paymentGateway->newChargesDuring(function () {
+        $newCharges = $paymentGateway->newChargesDuring(function ($paymentGateway) {
             $paymentGateway->charge(2500, $paymentGateway->getValidTestToken());
         });