template.yml

AWSTemplateFormatVersion: 2010-09-09
Transform: AWS::Serverless-2016-10-31
Parameters:
  TableName:
    Type: String
    Description: (Required) The name of the new DynamoDB table you want to create and save to. Minimum 3 characters
    MinLength: 3
    MaxLength: 50
    AllowedPattern: ^[A-Za-z_]+$
    ConstraintDescription: 'Required. Can be characters and underscore only. No numbers or special characters allowed.'
  CorsOrigin:
    Type: String
    Default: "'*'"
    Description: (Optional) Cross-origin resource sharing (CORS) Origin. You can specify a single origin, all "*" or leave empty and no CORS will be applied.
    MaxLength: 250
Resources:
  SaveApi:
    Type: AWS::Serverless::Api
    Properties:
      Cors:
        AllowHeaders: "'Content-Type,Authorization,X-Amz-Date,X-Api-Key,X-Amz-Security-Token'"
        AllowOrigin: !Ref CorsOrigin
        MaxAge: "'3600'"
        AllowMethods: "'OPTIONS,POST'"
      EndpointConfiguration: REGIONAL
      TracingEnabled: true
      StageName: prod
  LambdaSaver:
    Type: AWS::Serverless::Function
    Properties:
      Handler: index.handler
      Runtime: nodejs12.x
      CodeUri: src/
      Environment:
        Variables:
          TABLE_NAME: !Ref TableName
          CORS_ORIGIN: !Ref CorsOrigin
          PRIMARY_KEY: !Sub ${TableName}Id
      Policies:
        - DynamoDBCrudPolicy:
            TableName: !Ref TableName
      Events:
        SaveApi:
          Type: Api
          Properties:
            Path: /save
            Method: POST
            RestApiId: !Ref SaveApi
  DynamoDBTable:
    Type: AWS::DynamoDB::Table
    Properties:
      TableName: !Ref TableName
      AttributeDefinitions:
        - AttributeName: !Sub ${TableName}Id
          AttributeType: S
      KeySchema:
        - AttributeName: !Sub ${TableName}Id
          KeyType: HASH
      BillingMode: PAY_PER_REQUEST
      SSESpecification:
        SSEEnabled: True
      StreamSpecification:
        StreamViewType: NEW_IMAGE
Outputs:
  ApiUrl:
    Value: !Sub https://${SaveApi}.execute-api.${AWS::Region}.amazonaws.com/prod/save
    Description: The URL of the API Gateway you invoke to save to your DynamoDB Table.
  DynamoDBTable:
    Value: !Ref TableName
    Description: The name of your DynamoDB Table
  DynamoDBTableStreamArn:
    Value: !GetAtt DynamoDBTable.StreamArn
    Description: The ARN of your DynamoDB Table Stream