AWSTemplateFormatVersion: '2010-09-09'
Transform: AWS::Serverless-2016-10-31
Description: The Lambda function S3ObjectLambdaDecompression, is equipped to decompress objects stored in S3 in one of six compressed file formats including bzip2, gzip, snappy, zlib, zstandard and ZIP.

Metadata:
  AWS::ServerlessRepo::Application:
    Name: S3ObjectLambdaDecompression
    Description: The Lambda function S3ObjectLambdaDecompression, is equipped to decompress objects stored in S3 in one of six compressed file formats including bzip2, gzip, snappy, zlib, zstandard and ZIP.
    Author: S3 Object Lambda
    Labels: ['Lambda','Decompression']
    SemanticVersion: 1.0.0
    SourceCodeUrl: https://github.com/aws-samples/amazon-s3-object-lambda-decompression
    LicenseUrl: LICENSE
    SpdxLicenseId: MIT-0

Resources:
  S3ObjectLambdaDecompressionRole:
    Type: AWS::IAM::Role
    Properties:
      AssumeRolePolicyDocument:
        Version: 2012-10-17
        Statement:
            - Effect: Allow
              Principal:
                Service:
                  - lambda.amazonaws.com
              Action:
                - 'sts:AssumeRole'
      Description: Grants S3 Object Lambda WriteGetObjectResponse access on top of basic lambda rights
      Policies:
        - PolicyName: S3ObjectLambda
          PolicyDocument: 
            Version: "2012-10-17"
            Statement: 
              - Effect: "Allow"
                Action:
                  - "s3-object-lambda:WriteGetObjectResponse"
                Resource: "*"
      ManagedPolicyArns:
      - arn:aws:iam::aws:policy/service-role/AWSLambdaBasicExecutionRole

  CommonFunctionsLayer:
    Type: AWS::Serverless::LayerVersion
    Properties:
      LayerName : common-functions
      ContentUri: lambda-code/layer
      CompatibleRuntimes:
        - python3.7
    Metadata:
      BuildMethod: python3.7

  DecompressGZFunction:
     Type: AWS::Serverless::Function
     Properties:
       Layers:
         - !Ref CommonFunctionsLayer
       Role: !GetAtt S3ObjectLambdaDecompressionRole.Arn
       CodeUri: lambda-code/decompress_gz
       Handler: lambda_function.decompress
       Runtime: python3.7
       Timeout: 900
       MemorySize: 3008

  DecompressZipFunction:
    Type: AWS::Serverless::Function
    Properties:
      Role: !GetAtt S3ObjectLambdaDecompressionRole.Arn
      CodeUri: lambda-code/decompress_zip
      Handler: example.Handler::handleRequest
      Runtime: java11
      Timeout: 900
      MemorySize: 3008

  DecompressBz2Function:
    Type: AWS::Serverless::Function
    Properties:
      Layers:
        - !Ref CommonFunctionsLayer
      Role: !GetAtt S3ObjectLambdaDecompressionRole.Arn
      CodeUri: lambda-code/decompress_bz2
      Handler: lambda_function.decompress
      Runtime: python3.7
      Timeout: 900
      MemorySize: 3008

  DecompressZlibFunction:
     Type: AWS::Serverless::Function
     Properties:
       Layers:
         - !Ref CommonFunctionsLayer
       Role: !GetAtt S3ObjectLambdaDecompressionRole.Arn
       CodeUri: lambda-code/decompress_zlib
       Handler: lambda_function.decompress
       Runtime: python3.7
       Timeout: 900
       MemorySize: 3008

  DecompressZstdFunction:
     Type: AWS::Serverless::Function
     Properties:
       Layers:
         - !Ref CommonFunctionsLayer
       Role: !GetAtt S3ObjectLambdaDecompressionRole.Arn
       CodeUri: lambda-code/decompress_zstd
       Handler: lambda_function.decompress
       Runtime: python3.7
       Timeout: 900
       MemorySize: 3008
     Metadata:
       BuildMethod: makefile

  DecompressSnappyFunction:
     Type: AWS::Serverless::Function
     Properties:
       Layers:
         - !Ref CommonFunctionsLayer
       Role: !GetAtt S3ObjectLambdaDecompressionRole.Arn
       CodeUri: lambda-code/decompress_snappy
       Handler: lambda_function.decompress
       Runtime: python3.7
       Timeout: 900
       MemorySize: 3008
     Metadata:
       BuildMethod: makefile