Track Delivery status of SMSes

[BrianLusina]

Description

This adds functionality to track delivery status of initially sent SMS messages. Adds a webhook endpoint that an external SMS service provider can call to send sms status callbacks via REST POST requests.

How can we test this?

In order to test this, one can run unit tests on the project with:

make test-unit

And integration tests with:

make test-integration

Manual tests will require starting up the application as specified in the README of this project and making a POST request to the status callback endpoint provided i.e. http://localhost:5000/api/v1/sms/callback with the following payload:

{
"AccountSid": "<ACCOUNT_SID>"
"From": "<FROM>"
"MessageSid": "<MESSAGE_SID>"
"MessageStatus": "<MESSAGE_STATUS>"
"SmsSid": "<SMS_SID>"
"SmsStatus": "SMS_STATUS"
}

Note that the values in <> should be filled with actual values.

This should accept the status callback request and publish the message to a broker. A consumer then picks up the message and matches the callback request to an initially delivered sms message. If no such message is found, the consumer will publish a message to another queue for further processing(This logic will be handled in another PR).

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new errors