AWSTemplateFormatVersion: '2010-09-09'
Transform: 'AWS::Serverless-2016-10-31'
Description: |
  Serverless backend to support additional Amazon Connect functionality
Globals:
  Function:
    Timeout: 5
    Runtime: python3.7
    Handler: index.lambda_handler

Resources:

  ContactLookupLambda:
    Type: 'AWS::Serverless::Function'
    Properties:
      InlineCode: |
          import boto3
          import os
          import time

          ddb = boto3.resource('dynamodb')
          tb_name = os.environ['ContactHistoryTable']
          table = ddb.Table(tb_name)    
          
          def lambda_handler(event, context):
              print(event)

              now = int(time.time())
              contact_id = event["Details"]["Parameters"]["CustomerNumber"] 
              
              resp = table.update_item(
                  Key={"ContactId": contact_id},
                  UpdateExpression="SET LastCall = :n",
                  ExpressionAttributeValues={
                      ':n': now
                  },
                  ReturnValues="ALL_OLD"
              )
              if 'Attributes' in resp:
                  return {"ContactStatus": "return_caller"}
              else:
                  resp = table.put_item(Item={"ContactId": contact_id})
                  return {"ContactStatus": "new_caller"}
      Policies:
        - DynamoDBCrudPolicy: 
            TableName: !Ref ContactHistoryTable
      Environment:
        Variables:
          ContactHistoryTable: !Ref ContactHistoryTable





  ContactHistoryTable:
    Type: 'AWS::Serverless::SimpleTable'
    Properties:
        PrimaryKey:
          Name: ContactId
          Type: String