Parameters:
  EventsParam:
    Type: String
    Default: s3:ObjectCreated:*

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

Resources:
  ThumbnailFunction:
    Type: AWS::Serverless::Function
    Properties:
      CodeUri: s3://sam-demo-bucket/thumbnails.zip
      Handler: index.generate_thumbails
      Runtime: nodejs12.x
      Events:
        ImageBucket:
          Type: S3
          Properties:
            Bucket:
              Ref: Images
            Events:
            - s3:ObjectCreated:*
            Filter:
              Fn::If:
              - MyCondition
              - S3Key:
                  Rules:
                  - Name: Rule1Prefix
                    Value: Rule1Value
              - S3Key:
                  Rules:
                  - Name: Rule2Prefix
                    Value: Rule2Value

  Images:
    Type: AWS::S3::Bucket