Write door state updates to dynamo

write-door-state.py

import json
import boto3
import datetime
import dateutil.tz

eastern = dateutil.tz.gettz('US/Eastern')
dynamodb = boto3.resource('dynamodb')
table = dynamodb.Table("<DOOR-STATE-TABLE-NAME>")

def lambda_handler(event, context):
    var = 99 # log 99 if there is an error
    
    if "currentstate" in event.get("body"):
        var = json.loads(event.get("body")).get("currentstate")
        
    now = datetime.datetime.now(tz=eastern)
    str_key = str(now)
    int_key = int(datetime.datetime.timestamp(now))
    
    # we add a log and update timestamp 0 to track most recent value
    table.put_item(Item={"timestamp": int_key, "time": str_key, "currentstate": var })
    table.put_item(Item={"timestamp": 0, "key": int_key, "time": str_key, "currentstate": var })
    
    return {
        'statusCode': 200,
        'body': json.dumps('Hello from Lambda!')
    }