Automate Cloud Formation stack with API / Lambda

I have a cloud formation template that creates a stack for live streaming. This job is to enhance the template / workflow to enable automation via API / Lambda And add information to DynamoDB.

API
Authentication will be checked against Cognito.
API will have 3 endpoints. StartStream, StopStream and Status.

• StartStream (userID, event_description)
1. Generate Stream ID and write to DynamoDB (StreamID, Description, StartTime)
2. Launch Cloud formation template passing necessary variables
 Media Live (Single Pipeline)
 Media Package
 Media Store (Needs to be added to CF template)
 Media Tailor
 Cloud Front
3. Launch completed - resources / values will be written to DynamoDB
• StopStream (userID)
1. Query DynamoDB and get Cloud Formation ID
2. Delete Cloud formation
3. Remove resources / values from DynamoDB record. Add stop time.
• Status (StreamID)
1. Query DynamoDB for record.
 IF start time is set but no variables from CF template then return “stream starting” status.
 IF start time is set and variables from CF template are set and no end time, return Ready and Media Live host url.
 IF start time and end time are set, return “steam ended”
 IF record does not exist, return “not found”