Merge pull request #14 from chartmogul/cancellation_dates

Add setCancellationDates; simple docker travis build config

.travis.yml

@@ -0,0 +1,7 @@
+sudo: required
+
+services:
+  - docker
+
+script:
+  - make test

README.md

@@ -417,11 +417,16 @@ $subscriptions = $cus->subscriptions();
 ```php
 $canceldate = '2016-01-01T10:00:00.000Z';
 $cus = new ChartMogul\Import\Customer([
-    "uuid" => "cus_uuid"
+    'uuid' => 'cus_uuid'
 ]);
 $subscription = $subscriptions->last()->cancel($canceldate);
 ```
 
+Or set the cancellation dates:
+```php
+$cancellationDates = ['2016-01-01T10:00:00.000Z', '2017-01-01T10:00:00.000Z']
+$subscription = $subscriptions->last()->setCancellationDates($cancellationDates)
+```
 
 ### Metrics API
 

src/Import/Subscription.php

@@ -16,7 +16,7 @@ class Subscription extends AbstractResource
 
     use \ChartMogul\Service\CreateTrait;
     use \ChartMogul\Service\AllTrait;
-    
+
     /**
      * @ignore
      */
@@ -36,23 +36,43 @@ class Subscription extends AbstractResource
     protected $plan_uuid;
     protected $data_source_uuid;
 
+
+
+    private function cancellation($payload)
+    {
+        $response = $this->getClient()->send(
+            '/v1/import/subscriptions/'.$this->uuid,
+            'PATCH',
+            $payload
+        );
+        $this->cancellation_dates = $response['cancellation_dates'];
+        return $this;
+    }
+
     /**
      * Cancels a subscription that was generated from an imported invoice.
      * @param  string $cancelledAt The time at which the subscription was cancelled.
      * @return Subscription
      */
     public function cancel($cancelledAt)
     {
-        $response = $this->getClient()->send(
-            '/v1/import/subscriptions/'.$this->uuid,
-            'PATCH',
-            [
+        return $this->cancellation([
             'cancelled_at' => $cancelledAt
-            ]
-        );
-        $this->cancellation_dates = $response['cancellation_dates'];
-        return $this;
+        ]);
+    }
+
+    /**
+     * Changes dates of cancellation for a subscription.
+     * @param  array $cancellationDates The array of times (strings) at which the subscription was cancelled.
+     * @return Subscription
+     */
+    public function setCancellationDates($cancellationDates)
+    {
+        return $this->cancellation([
+            'cancellation_dates' => $cancellationDates
+        ]);
     }
+
     /**
      * @param array $data
      * @param ClientInterface|null $client