AWSTemplateFormatVersion: "2010-09-09"
Transform: AWS::Serverless-2016-10-31
Description: Happy Path - Example workflow 4

Parameters:
  ApplicationTableName:
    Type: String
    Description: Name of application's DynamoDB table
    Default: hp-application

  S3UploadBucketName:
    Type: String
    Description: The name for the S3 upload bucket.
    Default: 'happy-path-upload'

  S3DistributionBucketName:
    Type: String
    Description: The name for the S3 upload bucket.
    Default: 'happy-path-distribution'

  StreamARN:
    Type: String
    Description: The ARN for the DynamoDB table stream.
    Default: 'arn:aws:dynamodb:us-east-1:123456789012:table/hp-application/stream/2020-06-29T14:29:10.716'

  SharpLayerARN:
    Type: String
    Description: The ARN for the Sharp Lambda Layer.
    Default: 'arn:aws:lambda:us-east-1:763653534548:layer:node-sharp:3'

Globals:
  Function:
    Timeout: 5
    Runtime: nodejs12.x
    Tags:
      Application: HappyPath

Resources:
  #Lambda functions
  ResizerFunction:
    Type: AWS::Serverless::Function 
    Properties:
      CodeUri: ../../functions/resizer/
      Handler: app.handler
      MemorySize: 2056
      Layers:
        - !Ref SharpLayerARN
      Environment:
        Variables:
          OutputBucket: !Ref S3DistributionBucketName
          TableName: !Ref ApplicationTableName              
      Policies:
        - S3ReadPolicy:
            BucketName: !Ref S3UploadBucketName
        - S3CrudPolicy:
            BucketName: !Ref S3DistributionBucketName
        - DynamoDBWritePolicy:
            TableName: !Ref ApplicationTableName              

  PublishFunction:
    Type: AWS::Serverless::Function 
    Properties:
      CodeUri: ../../functions/publish/
      Handler: app.handler
      MemorySize: 128
      Layers:
        - !Ref SharpLayerARN
      Environment:
        Variables:
          TableName: !Ref ApplicationTableName              
      Policies:
        - DynamoDBWritePolicy:
            TableName: !Ref ApplicationTableName       

  ModeratorFunction:
    Type: AWS::Serverless::Function 
    Properties:
      CodeUri: ../../functions/analyze/moderator
      Handler: app.handler
      MemorySize: 128
      Timeout: 10  
      Policies:
        - S3ReadPolicy:
            BucketName: !Ref S3UploadBucketName
        - RekognitionLabelsPolicy: {}

  DimensionsFunction:
    Type: AWS::Serverless::Function 
    Properties:
      CodeUri: ../../functions/analyze/dimensions
      Handler: app.handler
      MemorySize: 128
      Environment:
        Variables:
          minPixels: 500
          allowedTypes: 'jpg'
      Policies:
        - S3ReadPolicy:
            BucketName: !Ref S3UploadBucketName

  LabelsFunction:
    Type: AWS::Serverless::Function 
    Properties:
      CodeUri: ../../functions/analyze/people
      Handler: app.handler
      MemorySize: 128
      Timeout: 10  
      Policies:
        - S3ReadPolicy:
            BucketName: !Ref S3UploadBucketName
        - RekognitionLabelsPolicy: {}

  # Step Functions state machine
  v4StateMachine:
    Type: AWS::Serverless::StateMachine
    Properties:
      DefinitionUri: ../../statemachines/v4.asl.json
      DefinitionSubstitutions:
        ResizerFunctionArn: !GetAtt ResizerFunction.Arn
        PublishFunctionArn: !GetAtt PublishFunction.Arn
        ModeratorFunctionArn: !GetAtt ModeratorFunction.Arn
        DimensionsFunctionArn: !GetAtt DimensionsFunction.Arn
        LabelsFunctionArn: !GetAtt LabelsFunction.Arn
        DDBGetItem: !Sub arn:${AWS::Partition}:states:::dynamodb:getItem
        DDBUpdateItem: !Sub arn:${AWS::Partition}:states:::dynamodb:updateItem
        DDBTable: !Ref ApplicationTableName
      Events:
        UploadComplete:
          Type: EventBridgeRule
          Properties:
            Pattern:
              source:
              - custom.happyPath
              detail-type:
              - uploadComplete
      Policies: # Find out more about SAM policy templates: https://docs.aws.amazon.com/serverless-application-model/latest/developerguide/serverless-policy-templates.html
        - LambdaInvokePolicy:
            FunctionName: !Ref ResizerFunction
        - LambdaInvokePolicy:
            FunctionName: !Ref PublishFunction
        - LambdaInvokePolicy:
            FunctionName: !Ref ModeratorFunction
        - LambdaInvokePolicy:
            FunctionName: !Ref DimensionsFunction
        - LambdaInvokePolicy:
            FunctionName: !Ref LabelsFunction            
        - DynamoDBCrudPolicy:
            TableName: !Ref ApplicationTableName