Add message tracking feature for draft sending

README.md

@@ -270,6 +270,26 @@ draft.delete()
 # client.drafts.delete(draft.id, {'version': draft.version})
 ```
 
+### Message Tracking Features
+
+If you have webhooks enabled for your developer application you can now access Nylas' [Message Tracking Features](https://www.nylas.com/docs/platform#enabling_tracking) to see when a recipient opens, replies, or clicks links within a message.
+
+```python
+# Send a message with tracking enabled
+draft = client.drafts.create()
+draft.to = [{'name': 'Python SDK open tracking test', 'email': 'inboxapptest415@gmail.com'}]
+draft.subject = "Python SDK open tracking test"
+draft.body = "Stay polish, stay hungary"
+draft.tracking = { 'links': 'false', 'opens': 'true', 'thread_replies': 'true', 'payload':'python sdk open tracking test' }
+draft.send()
+```
+
+It’s important to note that you must wrap links in `<a>` tags for them to be
+tracked. Most email clients automatically “linkify” things that look like links,
+like `10.0.0.1`, `tel:5402502334`, or `apple.com`. For links to be tracked
+properly, you must linkify the content before sending the draft.
+
+
 ### Working with Events
 
 The following example shows how to create and update an event.

nylas/client/restful_models.py

@@ -307,7 +307,7 @@ class Draft(Message):
     attrs = ["bcc", "cc", "body", "date", "files", "from", "id",
              "account_id", "object", "subject", "thread_id", "to",
              "unread", "version", "file_ids", "reply_to_message_id",
-             "reply_to", "starred", "snippet"]
+             "reply_to", "starred", "snippet", "tracking"]
     collection_name = 'drafts'
 
     def __init__(self, api, thread_id=None):

tests/system.py

@@ -55,6 +55,15 @@
 ev.calendar_id = calendar.id
 ev.save(notify_participants='true')
 
+# Send a message with tracking enabled
+print 'Send a message with open tracking enabled'
+draft = client.drafts.create()
+draft.to = [{'name': 'Python SDK open tracking test', 'email': 'inboxapptest415@gmail.com'}]
+draft.subject = "Python SDK open tracking test"
+draft.body = "Stay polish, stay hungary"
+draft.tracking = { 'links': 'false', 'opens': 'true', 'thread_replies': 'true', 'payload':'python sdk open tracking test' }
+draft.send()
+
 print 'Listing folders'
 for label in client.labels:
     print label.display_name