serverless.yml

service: polly-slack-bot

plugins:
  - serverless-plugin-typescript
  - serverless-dynamodb-local
  - serverless-offline

useDotenv: true

custom:
  prod:
    schedule: "cron(0 * * * ? *)"
  dev:
    schedule: "cron(* * * * ? *)"

  dynamodb:
    stages:
      - dev
    start:
      port: 8000
      inMemory: true
      migrate: true
      # Comment if you don't have a DynamoDB running locally
      noStart: true
    migration:
      dir: dynamodb/migrations

provider:
  name: aws
  runtime: nodejs14.x
  region: eu-central-1
  tags:
    TTL: 2025-12-31
    Project: Polly-Slack-Bot
  iam:
    role:
      statements:
        - Effect: Allow
          Action:
            - dynamodb:Query
            - dynamodb:Scan
            - dynamodb:GetItem
            - dynamodb:PutItem
            - dynamodb:UpdateItem
            - dynamodb:DeleteItem
            - dynamodb:BatchWriteItem
          Resource:
            - "arn:aws:dynamodb:${opt:region, self:provider.region}:*:table/${self:provider.environment.DYNAMODB_TABLE}"
            - "arn:aws:dynamodb:${opt:region, self:provider.region}:*:table/${self:provider.environment.DYNAMODB_TABLE}/index/*"
            - "arn:aws:dynamodb:${opt:region, self:provider.region}:*:table/${self:provider.environment.DYNAMODB_TABLE}-votes"
            - "arn:aws:dynamodb:${opt:region, self:provider.region}:*:table/${self:provider.environment.DYNAMODB_TABLE}-votes/index/*"
            - "arn:aws:dynamodb:${opt:region, self:provider.region}:*:table/${self:provider.environment.DYNAMODB_TABLE}-schedules"
            - "arn:aws:dynamodb:${opt:region, self:provider.region}:*:table/${self:provider.environment.DYNAMODB_TABLE}-schedules/index/*"

  environment:
    CLIENT_SIGNING_SECRET: ${env:CLIENT_SIGNING_SECRET}
    BOT_TOKEN: ${env:BOT_TOKEN}
    WEBHOOK_URI: /api/messages
    DYNAMODB_TABLE: ${self:service}-${sls:stage}

functions:
  pollyBot:
    handler: src/app.handler
    events:
      - http:
          path: slack/events
          method: post

  scheduler:
    handler: src/scheduler/scheduler.handler
    events:
      - schedule:
          rate: ${self:custom.${sls:stage}.schedule}
          enabled: true

resources:
  Description: CloudFormation Stack for the Polly Poll Bot
  Resources:
    PollDynamoDbTable:
      Type: 'AWS::DynamoDB::Table'
      DeletionPolicy: Retain
      Properties:
        AttributeDefinitions:
          - AttributeName: id
            AttributeType: S
        KeySchema:
          - AttributeName: id
            KeyType: HASH
        BillingMode: PAY_PER_REQUEST
        TableName: ${self:provider.environment.DYNAMODB_TABLE}
        Tags: 
          - Key: TTL
            Value: 2025-12-31
          - Key: Project
            Value: Polly-Slack-Bot
    SchedulesDynamoDbTable:
      Type: 'AWS::DynamoDB::Table'
      DeletionPolicy: Retain
      Properties:
        AttributeDefinitions:
          - AttributeName: id
            AttributeType: S
        KeySchema:
          - AttributeName: id
            KeyType: HASH
        BillingMode: PAY_PER_REQUEST
        TableName: ${self:provider.environment.DYNAMODB_TABLE}-schedules
        Tags: 
          - Key: TTL
            Value: 2025-12-31
          - Key: Project
            Value: Polly-Slack-Bot
    VotesDynamoDbTable:
      Type: 'AWS::DynamoDB::Table'
      DeletionPolicy: Retain
      Properties:
        AttributeDefinitions:
          - AttributeName: id
            AttributeType: S
          - AttributeName: PollId
            AttributeType: S
        KeySchema:
          - AttributeName: id
            KeyType: HASH
        BillingMode: PAY_PER_REQUEST
        GlobalSecondaryIndexes:
          - IndexName: "PollIdIndex"
            KeySchema:
              - AttributeName: PollId
                KeyType: HASH
            Projection:
              ProjectionType: ALL
        TableName: ${self:provider.environment.DYNAMODB_TABLE}-votes
        Tags: 
          - Key: TTL
            Value: 2025-12-31
          - Key: Project
            Value: Polly-Slack-Bot