stack.yml

---
AWSTemplateFormatVersion: '2010-09-09'
Transform: AWS::Serverless-2016-10-31
Description: Serverless Contact Us form for static website

Metadata:
  AWS::CloudFormation::Interface:
    ParameterGroups:
      -
        Label:
          default: "Configuration"
        Parameters:
          - Subject
          - ToEmailAddress
          - ReCaptchaSecret
Parameters:
  Subject:
    Type: String
    Description: Contact us email subject
  ToEmailAddress:
    Type: String
    Description: Email address you want contact form submittions to go to
  ReCaptchaSecret:
    Type: String
    Description: Your Google reCAPTCHA secret
Resources:

  #
  # SNS Topic
  #
  ContactUsSNSTopic:
    Type: AWS::SNS::Topic
    Properties:
      DisplayName:
        Fn::Join:
          - ''
          - - Ref: AWS::StackName
            - ' Topic'
      Subscription:
        - Endpoint: !Ref ToEmailAddress
          Protocol: email
      TopicName:
        Fn::Join:
          - ''
          - - Ref: AWS::StackName
            - '-topic'

  #
  # Our Lambda function.  Basic code has been added.  You will replace the code later via your Github repo.
  #
  ContactUsFunction:
    Type: AWS::Serverless::Function
    Properties:
      Handler: index.handler
      Timeout: 5
      CodeUri: ./index.js
      Runtime: nodejs12.x
      Policies:
        - SNSPublishMessagePolicy:
            TopicName: !GetAtt ContactUsSNSTopic.TopicName
      Events:
        PostEvent:
          Type: Api
          Properties:
            Path: /
            Method: post
      Environment:
        Variables:
          ReCaptchaSecret: !Ref ReCaptchaSecret
          ContactUsSNSTopic: !Ref ContactUsSNSTopic
          Subject: !Ref Subject

Outputs:
  ApiUrl:
    Description: URL of your API endpoint
    Value: !Join
      - ''
      - - https://
        - !Ref ServerlessRestApi
        - '.execute-api.'
        - !Ref 'AWS::Region'
        - '.amazonaws.com/Prod'