Feature/add missing fields (#231)

* Add missing ExpiredToken field to response
* Add ApnsUniqueID identifier for development push

client.go

@@ -192,6 +192,7 @@ func (c *Client) PushWithContext(ctx Context, n *Notification) (*Response, error
 	r := &Response{}
 	r.StatusCode = response.StatusCode
 	r.ApnsID = response.Header.Get("apns-id")
+	r.ApnsUniqueID = response.Header.Get("apns-unique-id")
 
 	decoder := json.NewDecoder(response.Body)
 	if err := decoder.Decode(r); err != nil && err != io.EOF {
@@ -234,5 +235,4 @@ func setHeaders(r *http.Request, n *Notification) {
 	} else {
 		r.Header.Set("apns-push-type", string(PushTypeAlert))
 	}
-
 }

client_test.go

@@ -370,16 +370,19 @@ func TestBadPayload(t *testing.T) {
 func Test200SuccessResponse(t *testing.T) {
 	n := mockNotification()
 	var apnsID = "02ABC856-EF8D-4E49-8F15-7B8A61D978D6"
+	var apnsUniqueID = "A6739D99-D92A-424B-A91E-BF012365BD4E"
 	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
 		w.Header().Set("Content-Type", "application/json; charset=utf-8")
 		w.Header().Set("apns-id", apnsID)
+		w.Header().Set("apns-unique-id", apnsUniqueID)
 		w.WriteHeader(http.StatusOK)
 	}))
 	defer server.Close()
 	res, err := mockClient(server.URL).Push(n)
 	assert.NoError(t, err)
 	assert.Equal(t, http.StatusOK, res.StatusCode)
 	assert.Equal(t, apnsID, res.ApnsID)
+	assert.Equal(t, apnsUniqueID, res.ApnsUniqueID)
 	assert.Equal(t, true, res.Sent())
 }
 

response.go

@@ -84,6 +84,9 @@ const (
 	// 405 The specified :method was not POST.
 	ReasonMethodNotAllowed = "MethodNotAllowed"
 
+	// 410 The device token has expired.
+	ReasonExpiredToken = "ExpiredToken"
+
 	// 410 The device token is inactive for the specified topic.
 	ReasonUnregistered = "Unregistered"
 
@@ -132,6 +135,11 @@ type Response struct {
 	// If the value of StatusCode is 410, this is the last time at which APNs
 	// confirmed that the device token was no longer valid for the topic.
 	Timestamp Time
+
+	// An identifier that is only available in the Developement enviroment. Use
+	// this to query Delivery Log information for the corresponding notification
+	// in Push Notifications Console.
+	ApnsUniqueID string
 }
 
 // Sent returns whether or not the notification was successfully sent.