Added 'mark_seen' sender action (#49)

* Added 'mark_seen' sender action

* Test for FacebookDriver::markSeen

Author: drobee

src/FacebookDriver.php

@@ -180,6 +180,23 @@ protected function validateSignature()
             'sha1='.hash_hmac('sha1', $this->content, $this->config->get('app_secret')));
     }
 
+    /**
+     * @param IncomingMessage $matchingMessage
+     * @return \Symfony\Component\HttpFoundation\Response
+     */
+    public function markSeen(IncomingMessage $matchingMessage)
+    {
+        $parameters = [
+            'recipient' => [
+                'id' => $matchingMessage->getSender(),
+            ],
+            'access_token' => $this->config->get('token'),
+            'sender_action' => 'mark_seen',
+        ];
+
+        return $this->http->post($this->facebookProfileEndpoint.'me/messages', [], $parameters);
+    }
+
     /**
      * @param IncomingMessage $matchingMessage
      * @return \Symfony\Component\HttpFoundation\Response

tests/FacebookDriverTest.php

@@ -928,6 +928,30 @@ public function it_calls_generic_event_for_unkown_facebook_events()
     }
 
     /** @test */
+    public function it_can_reply_mark_seen_sender_action()
+    {
+        $htmlInterface = m::mock(Curl::class);
+        $htmlInterface->shouldReceive('post')->once()->with('https://graph.facebook.com/v2.6/me/messages', [], [
+                'recipient' => [
+                    'id' => '1234567890',
+                ],
+                'sender_action' => 'mark_seen',
+                'access_token' => 'Foo',
+            ])->andReturn(new Response());
+
+        $request = m::mock(\Symfony\Component\HttpFoundation\Request::class.'[getContent]');
+        $request->shouldReceive('getContent')->andReturn('[]');
+
+        $driver = new FacebookDriver($request, [
+            'facebook' => [
+                'token' => 'Foo',
+            ],
+        ], $htmlInterface);
+
+        $message = new IncomingMessage('', '1234567890', '');
+        $driver->markSeen($message);
+    }
+
     public function it_returns_the_quick_reply_postback()
     {
         $request = '{"object":"page","entry":[{"id":"111899832631525","time":1480279487271,"messaging":[{"sender":{"id":"1433960459967306"},"recipient":{"id":"111899832631525"},"timestamp":1480279487147,"message":{"quick_reply":{"payload":"MY_PAYLOAD"},"mid":"mid.1480279487147:4388d3b344","seq":36,"text":"Red"}}]}]}';