SAM definition for audio generation workflow

generate_audio_state_machine.yaml

GenerateAudioStateMachine:
  Type: AWS::Serverless::StateMachine
  Properties:
    Name: !Sub GenerateAudioStateMachine-${Stage}
    DefinitionUri: src/generate_audio_state_machine.asl.json
    DefinitionSubstitutions:
      TableName: !Ref DynamoDBTable
      GetWordsForListIdFunction: !Ref GetWordsForListId
      PronunciationAudioBucket: !Ref PronunciationAudioBucket
    Policies:
      # SAM policy templates to simplify common IAM permissions
      - S3WritePolicy:
         BucketName: !Ref PronunciationAudioBucket
      - DynamoDBCrudPolicy:
         TableName: !Ref DynamoDBTable
      - LambdaInvokePolicy:
         FunctionName: !Ref GetWordsForListId
      # Custom policy for Polly 
      - Statement:
        - Sid: PollySynthesizeText
          Effect: Allow
          Action:
          - polly:StartSpeechSynthesisTask
          Resource: '*'

# SAM definitions for Lambda function, DynamoDB table, and S3 bucket not included
# See full template at: https://github.com/em-shea/vocab/blob/master/template.yaml