iot/projects/IoTCenter/Areas/Admin/Controllers/HomeController.cs

using Application.Domain.Entities;
using Infrastructure.Data;
using IoTCenter.Areas.Admin.ViewModels;
using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Mvc;
using System.Linq;

namespace IoTCenter.Areas.Admin.Controllers
{
    [Authorize]
    [Area(nameof(Admin))]
    public class HomeController : Controller
    {
        private readonly IRepository<Node> _nodeRepo;
        private readonly IRepository<Product> _productRepo;
        private readonly IRepository<Category> _categoryRepo;

        public HomeController(IRepository<Node> nodeRepo, IRepository<Category> categoryRepo, IRepository<Product> productRepo)
        {
            this._nodeRepo = nodeRepo;
            this._categoryRepo = categoryRepo;
            this._productRepo = productRepo;
        }

        public IActionResult Index()
        {
            var model = new HomeIndexViewModel
            {
                Nodes = this._nodeRepo.ReadOnlyTable().Select(o => new NodeViewModel
                {
                    Id = o.Id,
                    Number = o.Number,
                    Name = o.Name,
                    Image = o.Image,
                    DeviceCount = o.Devices.Count()
                }).ToList(),
                Categories = this._categoryRepo.ReadOnlyTable().Select(o => new CategoryViewModel
                {
                    Id = o.Id,
                    Name = o.Name,
                    Image = o.Image,
                    Number = o.Number,
                    DeviceCount = o.Products.SelectMany(o => o.Devices).Count()
                }).ToList(),
                Products = this._productRepo.ReadOnlyTable().Select(o => new ProductViewModel
                {
                    Id = o.Id,
                    Name = o.Name,
                    Image = o.Image,
                    DeviceCount = o.Devices.Count()
                }).ToList()
            };
            return View(model);
        }
    }
}