template.yml

AWSTemplateFormatVersion: "2010-09-09"
Transform: AWS::Serverless-2016-10-31

Resources:
    ContactFormApiDataBucket:
        Type: AWS::S3::Bucket
        Properties:
            BucketName: contact-form-api-data-bucket

    ContactFormApi:
        Type: AWS::Serverless::Api
        Properties:
            StageName: prod
            Cors:
                AllowOrigin: "'*'"
                AllowMethods: "'OPTIONS,GET,POST'"
                AllowHeaders: "'Content-Type,X-Amz-Date,Authorization,X-Api-Key,X-Amz-Security-Token'"

    ContactFormApiSaveMessage:
        Type: AWS::Serverless::Function
        Properties:
            Handler: index.saveMessage
            Runtime: nodejs18.x
            CodeUri: ./lambda
            MemorySize: 128
            Timeout: 10
            Policies:
                - S3ReadPolicy:
                      BucketName: !Ref ContactFormApiDataBucket
                - S3WritePolicy:
                      BucketName: !Ref ContactFormApiDataBucket
            Environment:
                Variables:
                    BUCKET_NAME: !Ref ContactFormApiDataBucket
            Events:
                ApiGateway:
                    Type: Api
                    Properties:
                        RestApiId: !Ref ContactFormApi
                        Path: /
                        Method: POST
                        Auth:
                            ApiKeyRequired: true

    ContactFormApiRetrieveMessage:
        Type: AWS::Serverless::Function
        Properties:
            Handler: index.retrieveMessages
            Runtime: nodejs18.x
            CodeUri: ./lambda
            MemorySize: 128
            Timeout: 10
            Policies:
                - S3ReadPolicy:
                      BucketName: !Ref ContactFormApiDataBucket
            Environment:
                Variables:
                    BUCKET_NAME: !Ref ContactFormApiDataBucket
            Events:
                ApiGateway:
                    Type: Api
                    Properties:
                        RestApiId: !Ref ContactFormApi
                        Path: /{email}
                        Method: GET
                        Auth:
                            ApiKeyRequired: true
    ContactFormApiOptions:
        Type: AWS::Serverless::Function
        Properties:
            Handler: index.optionsHandler
            Runtime: nodejs18.x
            CodeUri: ./lambda
            MemorySize: 128
            Timeout: 10
            Events:
                ApiGatewayRootOptions:
                    Type: Api
                    Properties:
                        RestApiId: !Ref ContactFormApi
                        Path: /
                        Method: OPTIONS
                ApiGatewayEmailOptions:
                    Type: Api
                    Properties:
                        RestApiId: !Ref ContactFormApi
                        Path: /{email}
                        Method: OPTIONS

    ContactFormApiKey:
        Type: AWS::ApiGateway::ApiKey
        Properties:
            Enabled: true
            Name: ContactFormApiKey
            StageKeys:
                - RestApiId: !Ref ContactFormApi
                  StageName: prod
    ContactFormApiUsagePlan:
        Type: AWS::ApiGateway::UsagePlan
        Properties:
            UsagePlanName: ContactFormApiUsagePlan
            Description: "Usage plan for the contact form API"
            ApiStages:
                - ApiId: !Ref ContactFormApi
                  Stage: prod
            Throttle:
                BurstLimit: 100
                RateLimit: 50
    ContactFormApiUsagePlanKey:
        Type: AWS::ApiGateway::UsagePlanKey
        Properties:
            KeyId: !Ref ContactFormApiKey
            KeyType: API_KEY
            UsagePlanId: !Ref ContactFormApiUsagePlan
Outputs:
    ApiKey:
        Description: "API Key for accessing the endpoint"
        Value: !Ref ContactFormApiKey
    ApiUrl:
        Description: "API Gateway endpoint URL"
        Value: !Sub "https://${ContactFormApi}.execute-api.${AWS::Region}.amazonaws.com/prod/"
    BucketName:
        Description: "S3 Bucket Name"
        Value: !Ref ContactFormApiDataBucket