template.yaml

AWSTemplateFormatVersion: '2010-09-09'
Transform: AWS::Serverless-2016-10-31
Description: >
  serverless-discord-bot
  A Serverless Discord Bot template built with Discord Slash Commands and AWS SAM.

Globals:
  Function:
    Runtime: nodejs14.x
    Timeout: 3

Resources:
  CommandsLayer:
    Type: AWS::Serverless::LayerVersion
    Properties:
      ContentUri: ./src/commands_layer

  CreateCommandsFunction:
    Type: AWS::Serverless::Function
    Properties:
      CodeUri: ./src/create_commands
      Description: "Function to create Discord Slash Commands"
      Handler: index.lambdaHandler
      Environment:
        Variables:
          DISCORD_APP_ID: '{{resolve:secretsmanager:/dev/serverless_discord_bot/discord:SecretString:app_id}}'
          DISCORD_PUBLIC_KEY: '{{resolve:secretsmanager:/dev/serverless_discord_bot/discord:SecretString:public_key}}'
          DISCORD_BOT_TOKEN: '{{resolve:secretsmanager:/dev/serverless_discord_bot/discord:SecretString:bot_token}}'
      Layers:
        - !Ref CommandsLayer

  CreateCommandsInvoker:
    Type: Custom::CreateCommandsInvoker
    Properties:
      ServiceToken: !GetAtt CreateCommandsFunction.Arn
      # Passing the CommandsLayer ARN will cause a custom resource update every time the commands are updated.
      # (note that the ARN of a LayerVersion Resource ends with an incrementing layer version number)
      CommandsLayerVersion: !Ref CommandsLayer

  DiscordInteractionApi:
    Type: AWS::Serverless::HttpApi
    Properties:
      StageName: prod

  DiscordHandlerFunction:
    Type: AWS::Serverless::Function
    Properties:
      CodeUri: ./src/handler
      Description: "Serverless Function to handle incoming Discord requests"
      Handler: index.lambdaHandler
      Events:
        HelloWorld:
          Type: HttpApi
          Properties:
            ApiId: !Ref DiscordInteractionApi
            Method: post
            Path: /event
      Environment:
        Variables:
          DISCORD_APP_ID: '{{resolve:secretsmanager:/dev/serverless_discord_bot/discord:SecretString:app_id}}'
          DISCORD_PUBLIC_KEY: '{{resolve:secretsmanager:/dev/serverless_discord_bot/discord:SecretString:public_key}}'
      Layers:
        - !Ref CommandsLayer

Outputs:
  DiscordInteractionApi:
    Description: "API Gateway endpoint URL"
    Value: !Sub "https://${DiscordInteractionApi}.execute-api.${AWS::Region}.amazonaws.com/prod/event"