AWSTemplateFormatVersion: '2010-09-09'
Transform: AWS::Serverless-2016-10-31
Description: Dynamic content service with RSS parser

Resources:
  DDBtable:
    Type: AWS::DynamoDB::Table
    Properties:
      AttributeDefinitions:
      - AttributeName: PK
        AttributeType: S
      - AttributeName: SK
        AttributeType: N
      KeySchema:
      - AttributeName: PK
        KeyType: HASH
      - AttributeName: SK
        KeyType: RANGE
      BillingMode: PAY_PER_REQUEST    

  ImportFunction:
    Type: AWS::Serverless::Function 
    Properties:
      Timeout: 10
      CodeUri: parser/
      Handler: app.handler
      Runtime: nodejs14.x
      MemorySize: 128
      Environment:
        Variables:
          Feed: 'https://aws.amazon.com/about-aws/whats-new/recent/feed/'
          TableName: !Ref DDBtable        
      Policies:
        - DynamoDBCrudPolicy:
            TableName: !Ref DDBtable        
      Events:
        EventBridgeSchedule:
          Type: Schedule
          Properties:
            Schedule: 'rate(1 hour)'
            Name: ImportSchedule
            Description: Import schedule for RSS parser
            Enabled: True     

  MyApi:
    Type: AWS::Serverless::HttpApi
    Properties:
      # CORS configuration - this is open for development only and should be restricted in prod.
      # See https://docs.aws.amazon.com/serverless-application-model/latest/developerguide/sam-property-httpapi-httpapicorsconfiguration.html   
      CorsConfiguration:
        AllowMethods:
          - GET
          - POST
          - DELETE
          - OPTIONS
        AllowHeaders:
          - "*"   
        AllowOrigins: 
          - "*"      

  GetItems:
    Type: AWS::Serverless::Function 
    Properties:
      Timeout: 3
      CodeUri: getItems/
      Handler: app.handler
      Runtime: nodejs14.x
      MemorySize: 128
      Environment:
        Variables:
          TableName: !Ref DDBtable        
      Policies:
        - DynamoDBReadPolicy:
            TableName: !Ref DDBtable        
      Events:
        UploadAssetAPI:
          Type: HttpApi
          Properties:
            Path: /items
            Method: get
            ApiId: !Ref MyApi

  CloudFront:  
    Type: AWS::CloudFront::Distribution
    Properties:
      DistributionConfig:
        Enabled: true
        IPV6Enabled: true
        HttpVersion: http2
        Comment: !Ref 'AWS::StackName'
        Origins:
        - Id: APIGOrigin
          DomainName: !Sub ${MyApi}.execute-api.${AWS::Region}.amazonaws.com
          CustomOriginConfig:
            HTTPSPort: 443
            OriginProtocolPolicy: https-only
        DefaultCacheBehavior:
          AllowedMethods: ["GET", "HEAD"]
          CachedMethods: ["GET", "HEAD"]
          ForwardedValues:
            Headers:
            - Access-Control-Request-Headers
            - Access-Control-Request-Method
            - Origin
            QueryString: true
          TargetOriginId: APIGOrigin
          ViewerProtocolPolicy: https-only
          Compress: true
          DefaultTTL: 300

Outputs: 
  MyDomainName:
    Description: "Domain name"
    Value: !GetAtt CloudFront.DomainName