Comment: State Machine that send human a task and sends a reminder every X seconds until task is complete.
StartAt: Parallel w/ UUID
States:
  Parallel w/ UUID:
    Type: Parallel
    Branches:
      - StartAt: Sleep for Reminder
        States:
          Sleep for Reminder:
            Type: Wait
            Seconds: ${ReminderTimeout}
            Next: DDB Get Task Status
          DDB Get Task Status:
            Type: Task
            Resource: arn:aws:states:::dynamodb:getItem
            Parameters:
              TableName: ${DDBTable}
              Key:
                id.$: $.uuid
            Next: Is Task Complete?
            ResultPath: $.DDB
          Is Task Complete?:
            Type: Choice
            Choices:
              - And:
                  - Variable: $.DDB.Item.taskComplete
                    IsPresent: true
                  - Variable: $.DDB.Item.taskComplete.S
                    StringMatches: 'true'
                Next: Success
            Default: Reset JSON
          Reset JSON:
            Type: Pass
            Next: SNS Send Reminder
            Parameters:
              uuid.$: $.uuid
          SNS Send Reminder:
            Type: Task
            Resource: arn:aws:states:::sns:publish
            Parameters:
              TopicArn: ${TopicArn}
              Message:
                Title: Reminder !!!
                Msg: Please complete task that was sent earlier
            Next: Sleep for Reminder
            ResultPath: null
          Success:
            Type: Succeed
      - StartAt: DDB Put Task Status
        States:
          DDB Put Task Status:
            Type: Task
            Resource: arn:aws:states:::dynamodb:putItem
            Parameters:
              TableName: ${DDBTable}
              Item:
                id.$: $.uuid
                taskComplete: 'false'
            Next: SNS Send Task Token to Human
            ResultPath: null
          SNS Send Task Token to Human:
            Type: Task
            Resource: arn:aws:states:::sns:publish.waitForTaskToken
            Parameters:
              TopicArn: ${TopicArn}
              Message:
                Title: Please Complete Task
                Msg: >-
                  You have a task that needs to be completed. When task is
                  completed send back StepFunction Token to complete state
                token.$: $$.Task.Token
            Next: DDB Update Task Status
            ResultPath: null
          DDB Update Task Status:
            Type: Task
            Resource: arn:aws:states:::dynamodb:updateItem
            Parameters:
              TableName: ${DDBTable}
              Key:
                id.$: $.uuid
              UpdateExpression: SET taskComplete = :myValueRef
              ExpressionAttributeValues:
                ':myValueRef': 'true'
            End: true
    End: true
    Parameters:
      uuid.$: States.UUID()