samtranslator/translator/verify_logical_id.py

from typing import Any, Dict

from samtranslator.model import Resource

do_not_verify = {
    # type_after_transform: type_before_transform
    "AWS::Lambda::Function": "AWS::Serverless::Function",
    "AWS::Lambda::LayerVersion": "AWS::Serverless::LayerVersion",
    "AWS::ApiGateway::RestApi": "AWS::Serverless::Api",
    "AWS::ApiGatewayV2::Api": "AWS::Serverless::HttpApi",
    "AWS::S3::Bucket": "AWS::S3::Bucket",
    "AWS::SNS::Topic": "AWS::SNS::Topic",
    "AWS::DynamoDB::Table": "AWS::Serverless::SimpleTable",
    "AWS::CloudFormation::Stack": "AWS::Serverless::Application",
    "AWS::Cognito::UserPool": "AWS::Cognito::UserPool",
    "AWS::ApiGateway::DomainName": "AWS::ApiGateway::DomainName",
    "AWS::ApiGateway::BasePathMapping": "AWS::ApiGateway::BasePathMapping",
    "AWS::ApiGateway::DomainNameV2": "AWS::ApiGateway::DomainNameV2",
    "AWS::ApiGateway::BasePathMappingV2": "AWS::ApiGateway::BasePathMappingV2",
    "AWS::StepFunctions::StateMachine": "AWS::Serverless::StateMachine",
    "AWS::AppSync::GraphQLApi": "AWS::Serverless::GraphQLApi",
}


def verify_unique_logical_id(resource: Resource, existing_resources: Dict[str, Any]) -> bool:
    """Return true if the logical id is unique."""

    # new resource logicalid exists in the template before transform
    if resource.logical_id is None or resource.logical_id not in existing_resources:
        return True
    # new resource logicalid is in  the do_not_resolve list
    if (
        resource.resource_type in do_not_verify
        and existing_resources[resource.logical_id]["Type"] in do_not_verify[resource.resource_type]
    ):
        return True
    return False