Template-API/RT.Application/Services/Implementation/Service.cs

using AutoMapper;
using RT.Domain.Entities;
using RT.Infrastructure.Repositories;

namespace RT.Application.Services;

public abstract class Service<TEntity, TCreate, TUpdate, TResponse>(
    IRepository<TEntity> repository,
    IMapper mapper)
    : IService<TCreate, TUpdate, TResponse>
    where TEntity : BaseEntity
{
    protected readonly IRepository<TEntity> Repository = repository;
    protected readonly IMapper Mapper = mapper;

    public virtual async Task<IEnumerable<TResponse>> GetAllAsync(CancellationToken ct = default)
    {
        var entities = await Repository.GetAllAsync(ct);
        return Mapper.Map<IEnumerable<TResponse>>(entities);
    }

    public virtual async Task<TResponse?> GetByIdAsync(Guid id, CancellationToken ct = default)
    {
        var entity = await Repository.GetByIdAsync(id, ct);
        return entity is null ? default : Mapper.Map<TResponse>(entity);
    }

    public virtual async Task<TResponse> CreateAsync(TCreate dto, CancellationToken ct = default)
    {
        var entity = Mapper.Map<TEntity>(dto);
        await Repository.InsertAsync(entity, ct);
        return Mapper.Map<TResponse>(entity);
    }

    public virtual async Task<TResponse> UpdateAsync(Guid id, TUpdate dto, CancellationToken ct = default)
    {
        var entity = await Repository.GetByIdAsync(id, ct)
            ?? throw new KeyNotFoundException($"{typeof(TEntity).Name} {id} not found.");

        Mapper.Map(dto, entity);
        await Repository.UpdateAsync(entity, ct);
        return Mapper.Map<TResponse>(entity);
    }

    public virtual async Task DeleteAsync(Guid id, CancellationToken ct = default)
    {
        var entity = await Repository.GetByIdAsync(id, ct)
            ?? throw new KeyNotFoundException($"{typeof(TEntity).Name} {id} not found.");

        await Repository.RemoveAsync(entity, ct);
    }
}