## Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
## SPDX-License-Identifier: MIT-0

AWSTemplateFormatVersion: '2010-09-09'
Transform: AWS::Serverless-2016-10-31
Description: Introduction to serverless for developers:part3 GitHub to Slack
  
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#  Parameters & Globals                                                  #
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Parameters:
  slackUrl:
    Type: String
    Description: your Slack Webhook Url.
    Default: ""
Resources:
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#   Lambda Functions                                                      #
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  StarWebhookHandler:
    Type: AWS::Serverless::Function
    Properties:
      Description: A github webhook handler when repo is starred
      CodeUri: src_starred/
      Handler: app.handler
      Runtime: nodejs12.x
      Timeout: 3
      Policies:
        - S3ReadPolicy:
            BucketName: !Ref SrcBucket
       # Un-comment the following 2 lines to grant S3 read permissions     
       #- S3WritePolicy: 
        #   BucketName: !Ref SrcBucket
      Environment:
        Variables:
          slackEndpoint: !Ref slackUrl
          bucket: !Ref SrcBucket
      Events:
        HttpApiEvent:
          Type: HttpApi
          Properties:
            Path: /
            Method: POST
      
  
  PushWebhookHandler:
    Type: AWS::Serverless::Function
    Properties:
      Description: A github webhook handler when repo is forked
      CodeUri: src_push/
      Handler: app.handler
      Runtime: nodejs12.x
      Timeout: 3
      Policies:
        - S3WritePolicy:
            BucketName: !Ref SrcBucket
      Environment:
        Variables:
          slackEndpoint: !Ref slackUrl
          bucket: !Ref SrcBucket
      Events:
        HttpApiEvent:
          Type: HttpApi
          Properties:
            Path: /push
            Method: POST

  SrcBucket:
    Type: AWS::S3::Bucket

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#   Stack outputs                                                        #
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Outputs:

  StackName:
    Description: "The stack name"
    Value: !Ref AWS::StackName

  StarGitHubEndpoint:
    Description: "The star invocation URl to provide to github webhook"
    Value: !Sub "https://${ServerlessHttpApi}.execute-api.${AWS::Region}.amazonaws.com"

  PushGitHubEndpoint:
    Description: "The Push invocation URl to provide to github webhook"
    Value: !Sub "https://${ServerlessHttpApi}.execute-api.${AWS::Region}.amazonaws.com/fork"

  StarWebhookLambdaFunctionName:
    Description: "Logical resource name of the deployed Lambda function"
    Value: !Ref StarWebhookHandler

  PushWebhookFunctionName:
    Description: "Logical resource name of the deployed Lambda function"
    Value: !Ref PushWebhookHandler

  Bucket:
    Description: "My S3 log bucket"
    Value: !Ref SrcBucket