Parameters:
  CorsOrigin:
    Default: ''
    Type: String
    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
  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
    MinLength: 3
    ConstraintDescription: Required. Can be characters and underscore only. No numbers or special characters allowed.
AWSTemplateFormatVersion: '2010-09-09'
Outputs:
  DynamoDBTable:
    Description: The name of your DynamoDB Table
    Value:
      Ref: TableName
  ApiUrl:
    Description: The URL of the API Gateway you invoke to save to your DynamoDB Table.
    Value:
      Fn::Sub: https://${ServerlessRestApi}.execute-api.${AWS::Region}.amazonaws.com/Prod/save
  DynamoDBTableStreamArn:
    Description: The ARN of your DynamoDB Table Stream
    Value:
      Fn::GetAtt:
      - DynamoDBTable
      - StreamArn
Conditions:
  IsCorsDefined:
    Fn::Not:
    - Fn::Equals:
      - Ref: CorsOrigin
      - ''
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: ${TableName}Id
        AttributeType: S
      ProvisionedThroughput:
        WriteCapacityUnits: 1
        ReadCapacityUnits: 1
  ServerlessRestApi:
    Type: AWS::Serverless::Api
    Properties:
      __MANAGE_SWAGGER: true
      DefinitionBody:
        info:
          version: '1.0'
          title:
            Ref: AWS::StackName
        paths:
          /save:
            post:
              x-amazon-apigateway-integration:
                httpMethod: POST
                type: aws_proxy
                uri:
                  Fn::Sub: arn:aws:apigateway:${AWS::Region}:lambda:path/2015-03-31/functions/${LambdaSaver.Arn}/invocations
              responses: {}
            options:
              x-amazon-apigateway-integration:
                httpMethod: POST
                type: aws_proxy
                uri:
                  Fn::Sub: arn:aws:apigateway:${AWS::Region}:lambda:path/2015-03-31/functions/${LambdaSaver.Arn}/invocations
              responses: {}
        swagger: '2.0'
      StageName: Prod
  LambdaSaver:
    Type: AWS::Serverless::Function
    Properties:
      Environment:
        Variables:
          IS_CORS: IsCorsDefined
          TABLE_NAME:
            Ref: TableName
          PRIMARY_KEY:
            Fn::Sub: ${TableName}Id
          CORS_ORIGIN:
            Ref: CorsOrigin
      Handler: index.handler
      Policies:
      - Statement:
        - Action:
          - dynamodb:GetItem
          - dynamodb:DeleteItem
          - dynamodb:PutItem
          - dynamodb:Scan
          - dynamodb:Query
          - dynamodb:UpdateItem
          - dynamodb:BatchWriteItem
          - dynamodb:BatchGetItem
          - dynamodb:DescribeTable
          Resource:
            Fn::Sub:
            - arn:${AWS::Partition}:dynamodb:${AWS::Region}:${AWS::AccountId}:table/${tableName}
            - tableName:
                Ref: TableName
          Effect: Allow
      CodeUri:
        Bucket: <%REPO_BUCKET%>
        Key: fb1a3a5a-28d6-415a-85f4-0e358a30383f
      Runtime: nodejs10.x
      Events:
        SaveApi:
          Type: Api
          Properties:
            Path: /save
            RestApiId:
              Ref: ServerlessRestApi
            Method: POST
        SaveOptionsApi:
          Type: Api
          Properties:
            Path: /save
            RestApiId:
              Ref: ServerlessRestApi
            Method: OPTIONS