Comment: Curbside Pickup State Machine
StartAt: DDB CreateOrder
States:
  DDB CreateOrder:
    Type: Task
    Resource: arn:aws:states:::dynamodb:putItem
    Parameters:
      TableName: ${DDBTable}
      Item:
        Item:
        id.$: $.id
        name.$: $.name
        email.$: $.email
        customer_id.$: $.customer_id
        store_id.$: $.store_id
        products.$: States.JsonToString($.products)
        order_status: pick-order
    Next: SQS PickItem
    ResultPath: null
  SQS PickItem:
    Type: Task
    Resource: arn:aws:states:::sqs:sendMessage.waitForTaskToken
    Parameters:
      QueueUrl: ${SQSPick}
      MessageBody:
        id.$: $.id
        taskToken.$: $$.Task.Token
    Next: ItemFound?
  ItemFound?:
    Type: Choice
    Choices:
      - Variable: $.taskComplete
        BooleanEquals: false
        Next: DDB UpdateStatus Error
    Default: DDB UpdateStatus
  DDB UpdateStatus:
    Type: Task
    Resource: arn:aws:states:::dynamodb:updateItem
    Parameters:
      TableName: ${DDBTable}
      Key:
        id.$: $.id
      UpdateExpression: SET order_status = :stat, taskToken = :tk
      ExpressionAttributeValues:
        ':stat': 'pick-complete'
        ':tk': ''
    Next: SNS ReadyPickup
    ResultPath: null
  SNS ReadyPickup:
    Type: Task
    Resource: arn:aws:states:::sns:publish.waitForTaskToken
    Parameters:
      Message:
        status: ready-pickup
        url.$: States.Format('http://localhost:3000/arrival?order={}&token={}', $.id, $$.Task.Token)
      TopicArn: ${SNSCustomer}
    Next: CustomerArrived?
    TimeoutSeconds: 86400
  CustomerArrived?:
    Type: Choice
    Choices:
      - Variable: $.taskComplete
        BooleanEquals: false
        Next: DDB CancelOrder
    Default: DDB Update Customer Status
  DDB Update Customer Status:
    Type: Task
    Resource: arn:aws:states:::dynamodb:updateItem
    Parameters:
      TableName: ${DDBTable}
      Key:
        id.$: $.id
      UpdateExpression: SET order_status = :stat, cust_location = :loc
      ExpressionAttributeValues:
        ':stat': customer-arrived
        ':loc.$': $.location
    Next: SNS DeliverToCurb
    ResultPath: null
  SNS DeliverToCurb:
    Type: Task
    Resource: arn:aws:states:::sns:publish.waitForTaskToken
    Parameters:
      Message:
        id.$: $.id
        status: customer-arrived
        location.$: $.location
        taskToken.$: $$.Task.Token
      TopicArn: ${SNSBackend}
    Next: DDB CompleteOrder
    ResultPath: null
  DDB CancelOrder:
    Type: Task
    Resource: arn:aws:states:::dynamodb:updateItem
    Parameters:
      TableName: ${DDBTable}
      Key:
        id.$: $.id
      UpdateExpression: SET order_status = :stat, taskToken = :tk
      ExpressionAttributeValues:
        ':stat': 'cancel-restock'
        ':tk': ''
    Next: SNS OrderCancel
    ResultPath: null
  SNS OrderCancel:
    Type: Task
    Resource: arn:aws:states:::sns:publish
    Parameters:
      Message:
        id.$: $.id
        status: order-cancel
        msg: >-
          Sorry to hear you no longer want your order. This is a confirmation
          your order has been canceled.
      TopicArn: ${SNSCustomer}
    Next: SQS RestockItem
    ResultPath: null
  SQS RestockItem:
    Type: Task
    Resource: arn:aws:states:::sqs:sendMessage
    Parameters:
      MessageBody.$: $
      QueueUrl: ${SQSRestock}
    End: true
  DDB CompleteOrder:
    Type: Task
    Resource: arn:aws:states:::dynamodb:updateItem
    Parameters:
      TableName: ${DDBTable}
      Key:
        id.$: $.id
      UpdateExpression: SET order_status = :stat, taskToken = :tk
      ExpressionAttributeValues:
        ':stat': 'curbside-complete'
        ':tk': ''
    End: true
  DDB UpdateStatus Error:
    Type: Task
    Resource: arn:aws:states:::dynamodb:updateItem
    Parameters:
      TableName: ${DDBTable}
      Key:
        id.$: $.id
      UpdateExpression: SET order_status = :stat, taskToken = :tk
      ExpressionAttributeValues:
        ':stat': 'pick-error'
        ':tk': ''
    Next: SNS OrderIssue
    ResultPath: null
  SNS OrderIssue:
    Type: Task
    Resource: arn:aws:states:::sns:publish
    Parameters:
      TopicArn: ${SNSCustomer}
      Message:
        id.$: $.id
        msg: >-
          One of your items is out of stock and your order cannot be fullfiled.
          Please contact customer support for next steps
        status: out-of-stock
    End: true