AWSTemplateFormatVersion: '2010-09-09'
Transform: AWS::Serverless-2016-10-31
Description: Serverless patterns - EventBridge to SNS
  
Resources:

  # Define the SNS topic
  MySnsTopic:
    Type: AWS::SNS::Topic

  # Define the event rule to filter for events
  EventRule: 
    Type: AWS::Events::Rule
    Properties: 
      Description: "EventRule"
      EventPattern: 
        account: 
          - !Sub '${AWS::AccountId}'
        source:
          - "demo.cli"
      Targets: 
        - Arn: !Ref MySnsTopic
          Id: "SNStopic"

  # Allow EventBridge to invoke SNS
  EventBridgeToToSnsPolicy:
    Type: AWS::SNS::TopicPolicy
    Properties: 
      PolicyDocument:
        Statement:
        - Effect: Allow
          Principal:
            Service: events.amazonaws.com
          Action: sns:Publish
          Resource: !Ref MySnsTopic
      Topics: 
        - !Ref MySnsTopic      

Outputs:
  MySnsTopicName:
    Description: SNS topic name
    Value: !GetAtt MySnsTopic.TopicName
  MySnsTopicArn:
    Description: SNS topic ARN
    Value: !Ref MySnsTopic