Description: |
  lex-dynamodb
  Example of how a serverless app can handle Lex requests and log intent and/or session data to dynamodb.
Parameters:
  TableName:
    AllowedPattern: ^[A-Za-z_]+$
    Type: String
    Description: (Required) The name of the new DynamoDB table you want to create and save to. Minimum 3 characters
    MaxLength: 50
    Default: LexLog
    MinLength: 3
    ConstraintDescription: Required. Can be characters and underscore only. No numbers or special characters allowed.
AWSTemplateFormatVersion: '2010-09-09'
Outputs:
  LogIntentFunctionArn:
    Description: Lambda function that takes Lex fulfillment requests and logs them to DynamoDB
    Value:
      Fn::GetAtt:
      - LogIntentFunction
      - Arn
  DynamoDBTableArn:
    Description: The ARN of your DynamoDB Table
    Value:
      Fn::GetAtt:
      - DynamoDBTable
      - Arn
Transform: AWS::Serverless-2016-10-31
Resources:
  DynamoDBTable:
    Type: AWS::DynamoDB::Table
    Properties:
      KeySchema:
      - KeyType: HASH
        AttributeName:
          Fn::Sub: ${TableName}Id
      StreamSpecification:
        StreamViewType: NEW_AND_OLD_IMAGES
      TableName:
        Ref: TableName
      AttributeDefinitions:
      - AttributeName:
          Fn::Sub: ${TableName}Id
        AttributeType: S
      ProvisionedThroughput:
        WriteCapacityUnits: 1
        ReadCapacityUnits: 1
  LogIntentFunction:
    Type: AWS::Serverless::Function
    Properties:
      FunctionName: logIntent
      Environment:
        Variables:
          TABLE_NAME:
            Ref: TableName
          PRIMARY_KEY:
            Fn::Sub: ${TableName}Id
      Handler: index.handler
      Timeout: 10
      Policies:
      - Statement:
        - Action:
          - dynamodb:GetItem
          - dynamodb:DeleteItem
          - dynamodb:PutItem
          - dynamodb:Scan
          - dynamodb:Query
          - dynamodb:UpdateItem
          - dynamodb:BatchWriteItem
          - dynamodb:BatchGetItem
          Resource:
            Fn::Sub:
            - arn:${AWS::Partition}:dynamodb:${AWS::Region}:${AWS::AccountId}:table/${tableName}
            - tableName:
                Ref: DynamoDBTable
          Effect: Allow
      CodeUri:
        Bucket: <%REPO_BUCKET%>
        Key: 2658129b-dbc7-49f1-97dd-f7a21ed3aa2f
      Runtime: nodejs10.x
      Description: Log Lex intent to a DynamoDB table