RackPeek/RackPeek.Domain/UseCases/DeleteResourceUseCase.cs

using RackPeek.Domain.Helpers;
using RackPeek.Domain.Persistence;
using RackPeek.Domain.Resources;

namespace RackPeek.Domain.UseCases;

public interface IDeleteResourceUseCase<T> : IResourceUseCase<T>
    where T : Resource
{
    Task ExecuteAsync(string name);
}

public class DeleteResourceUseCase<T>(IResourceCollection repo) : IDeleteResourceUseCase<T> where T : Resource
{
    public async Task ExecuteAsync(string name)
    {
        name = Normalize.HardwareName(name);
        ThrowIfInvalid.ResourceName(name);

        var existingResource = await repo.GetByNameAsync(name);
        if (existingResource == null)
            throw new NotFoundException($"Resource '{name}' does not exist.");

        var dependants = await repo.GetDependantsAsync(name);
        foreach (var resource in dependants)
        {
            resource.RunsOn = null;
            await repo.UpdateAsync(resource);
        }

        await repo.DeleteAsync(name);
    }
}