Transform: AWS::Serverless-2016-10-31
Description: > 
    Lambda function and supporting resources to capture the user who deployed
    a CloudFormation stack.

Globals:
  Function:
    Runtime: python3.7
    Timeout: 180
    Handler: index.lambda_handler
    
Parameters:
  Nonce:
    Type: String
    Description: Forces custom resource to run everytime CF runs -- pass in a $RANDOM as a parameter


Resources:
  AttachLayer:
    Type: Custom::LayerAttachment
    Properties:
      LayerName: lyr-csr-common
      LambdaName: !Ref LambdaFunction
      #CloudFormation will not execute the custom resource if no properties are changed.
      #Along with the parameter, this ensures that the resource is called each time CloudFormation runs
      Nonce: !Ref Nonce
      ServiceToken: !ImportValue CFNAttachLambdaLayer
      
  LambdaFunction:
    Type: AWS::Serverless::Function
    Properties:
      FunctionName: lmd-csr-store-cft-deployer
      CodeUri: ./src
      Policies:
      - DynamoDBWritePolicy:
          TableName: !Ref TrackingTable
      Events:
        Trigger:
          Type: CloudWatchEvent
          Properties:
            Pattern:
              source:
                - aws.cloudformation
              detail-type:
                - AWS API Call via CloudTrail
              detail:
                eventSource:
                  - cloudformation.amazonaws.com
                eventName:
                  - CreateStack
  TrackingTable:
    Type: AWS::Serverless::SimpleTable
    Properties:
      PrimaryKey:
        Name: CFStackid
        Type: String
      TableName: sc-track-user