Parameters:
  SnsRegion:
    Type: String
    Default: us-east-1

Conditions:
  MyCondition:
    Fn::Equals:
    - true
    - false

Resources:
  SaveNotificationFunction:
    Type: AWS::Serverless::Function
    Properties:
      CodeUri: s3://sam-demo-bucket/notifications.zip
      Handler: index.save_notification
      Runtime: nodejs12.x
      Events:
        NotificationTopic:
          Type: SNS
          Properties:
            FilterPolicy:
              Fn::If:
              - MyCondition
              - price_usd:
                - numeric:
                  - '>='
                  - 100
              - price_usd:
                - numeric:
                  - <
                  - 100
            FilterPolicyScope: MessageAttributes
            Region:
              Ref: SnsRegion
            SqsSubscription: true
            Topic:
              Ref: Notifications

  Notifications:
    Type: AWS::SNS::Topic