apigateway.yml

Description: "Template for API Gateway deployment for reference of Serverless APIs."


Parameters:
  ApiName:
    Description: "Name of the REST API Gateway."
    Type: String
  ApiDescription:
    Description: "Description of the REST API Gateway."
    Type: String
  WebSocketName:
    Description: "Name of the WebSocket API."
    Type: String
  WebSocketDescription:
    Description: "Description of the WebSocket API."
    Type: String
  CognitoStackName:
    Description: "Name of the Cognito Cloudformation Stack."
    Type: String


Resources:
  ApiGateway:
    Type: AWS::ApiGateway::RestApi
    Properties:
      Name: !Ref ApiName
      Description: !Ref ApiDescription
      ApiKeySourceType: HEADER
      EndpointConfiguration:
        Types:
          - REGIONAL

  ApiGatewayAuthorizer:
    Type: AWS::ApiGateway::Authorizer
    Properties: 
      AuthType: cognito_user_pools
      IdentitySource: method.request.header.Authorization
      Name: !Sub "${ApiName}-authorizer"
      ProviderARNs: 
        - Fn::ImportValue:
            Fn::Sub: "${CognitoStackName}-UserPoolArn"
      RestApiId: !Ref ApiGateway
      Type: COGNITO_USER_POOLS

  WebSocketApiGateway:
    Type:  AWS::ApiGatewayV2::Api
    Properties: 
      ApiKeySelectionExpression: "$request.header.x-api-key"
      Description: !Ref WebSocketDescription
      Name: !Ref WebSocketName
      ProtocolType: WEBSOCKET
      RouteSelectionExpression: "$request.body.action"


Outputs:
  ApiGatewayId:
    Description: "The ID of the API Gateway to be used by Serverless applications."
    Value: !Ref ApiGateway
    Export:
      Name: !Sub "${AWS::StackName}-ApiGatewayId"
  RootResourceId:
    Description: "The Root Resource ID of the API Gateway."
    Value: !GetAtt ApiGateway.RootResourceId
    Export:
      Name: !Sub "${AWS::StackName}-RootResourceId"
  ApiGatewayAuthorizerId:
    Description: "The API Gateway Authorizer ID refered to by the Serverless applications."
    Value: !Ref ApiGatewayAuthorizer
    Export:
      Name: !Sub "${AWS::StackName}-ApiGatewayAuthorizerId"
  WebSocketApiGatewayId:
    Description: "The ID of the WebSocket API to be used by Serverless Applications."
    Value: !Ref WebSocketApiGateway
    Export:
      Name: !Sub "${AWS::StackName}-WebSocketApiGatewayId"
  WebSocketApiGatewayName:
    Description: "The name of the WebSocket API to be used by the Serverless Application."
    Value: !Ref WebSocketName
    Export:
      Name: !Sub "${AWS::StackName}-WebSocketApiGatewayName"