angular-http

To separate Angular HTTP API calls from domain logic, use an API Client that returns Observable<DTO> for HTTP requests, and a Repository layer that converts this to Promise<Result<T>> using firstValueFrom for safe domain consumption. This pattern enforces clean boundaries and centralized error handling.

The best way to handle HTTP errors consistently across multiple Angular endpoints is to implement a Repository pattern that wraps API calls and returns a uniform Promise<Result<T>>. This centralizes error handling and ensures consistent responses across your application.

To map DTOs to domain models in Angular, structure your API Client to return Observable<DTO> and use the Repository layer to perform the mapping. The repository converts the observable to a Promise and returns Promise<Result<T>> containing the mapped domain model.

Yes, this Angular HTTP pattern is specifically designed for API-heavy applications requiring robust error handling and DTO mapping across multiple endpoints. It standardizes HTTP integration by enforcing Observable returns in the API Client and Promise<Result<T>> returns in the repository.

You convert Observable to Promise in an Angular repository using firstValueFrom to bridge the reactive API Client with the domain logic. This allows the repository to return Promise<Result<T>>, providing a safe, uniform interface for application components to consume data and handle errors.