Class: Jets::Stack::S3Event

Inherits:
Object
  • Object
show all
Defined in:
lib/jets/stack/s3_event.rb

Instance Method Summary collapse

Constructor Details

#initialize(bucket_name) ⇒ S3Event

Returns a new instance of S3Event.



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# File 'lib/jets/stack/s3_event.rb', line 3

def initialize(bucket_name)
  @bucket_name = bucket_name
end

Instance Method Details

#build_stack ⇒ Object 



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# File 'lib/jets/stack/s3_event.rb', line 15

def build_stack
  # assign to local variable so its available in the block
  bucket = @bucket_name

  Jets::Stack.new_class(stack_name) do
    s3_bucket_configuration(:s3_bucket_configuration,
      service_token: "!GetAtt JetsS3BucketConfig.Arn", # Cannot change this w/o changing the logical id
      # These properties correspond to the ruby aws-sdk s3.put_bucket_notification_configuration
      # in jets/s3_bucket_config.rb, not the CloudFormation Bucket properties. The CloudFormation
      # bucket properties have a similiar structure but is slightly different so it can be confusing.
      #
      #   Ruby aws-sdk S3 Docs: https://amzn.to/2N7m5Lr
      bucket: bucket,
      notification_configuration: Jets.config.s3_event.notification_configuration,
    ) if Jets.config.s3_event.configure_bucket

    # Important note: If we change the name of this function we should also change the
    # logical id of the s3_bucket_configuration custom resource or we'll get this error:
    #   Modifying service token is not allowed.
    function("jets/s3_bucket_config",
      role: "!GetAtt BucketConfigIamRole.Arn",
      layers: ["!Ref GemLayer"],
    )

    sns_topic(:sns_topic)
    sns_topic_policy(:sns_topic_policy,
      policy_document: {
        version: "2012-10-17",
        statement: {
          effect: "Allow",
          principal: { service: "s3.amazonaws.com"},
          action: "sns:Publish",
          resource: "!Ref SnsTopic",
          condition: {
            arn_like: {
              "aws:SourceArn" => "!Sub arn:aws:s3:*:*:#{bucket}"
            }
          }
        }
      },
      topics: ["!Ref SnsTopic"],
    )

    iam_role(:bucket_config_iam_role,
      assume_role_policy_document: {
        version: '2012-10-17',
        statement: [
          effect: "Allow",
          principal: {service: ["lambda.amazonaws.com"]},
          action: ['sts:AssumeRole'],
        ]
      },
      path: "/",
      managed_policy_arns: ["arn:aws:iam::aws:policy/service-role/AWSLambdaBasicExecutionRole"],
      policies: [
        policy_name: "S3Policy",
        policy_document: {
          version: '2012-10-17',
          statement: [
            effect: "Allow",
            action: [
              's3:GetBucketNotification',
              's3:PutBucketNotification',
            ],
            resource: "*"
          ]
        }
      ]
    )
  end
end

#stack_name ⇒ Object

Stack names can only contain alpha numeric chars. Bucket names are limit to 64 chars: amzn.to/2SIzvme Stack names are limit to 128 chars: amzn.to/2SFkrG0 This gsub should handle this.



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# File 'lib/jets/stack/s3_event.rb', line 11

def stack_name
  @bucket_name.gsub(/[^0-9a-z\-_]/i, '').gsub('-','_').camelize
end