refactor: вынес значение количества записей на странице пользователей в файл appsettings.json.

PhoneStore/Controllers/UsersController.cs

@@ -17,10 +17,9 @@ namespace PhoneStore.Controllers
         [HttpGet]
         public async Task<IActionResult> Index(string filterByName, Order order = Order.AgeAsc, int page = 1)
         {
-            int pageSize = 2;
             ViewBag.NameSort = order == Order.NameAsc ? Order.NameDesc : Order.NameAsc;
             ViewBag.AgeSort = order == Order.AgeAsc ? Order.AgeDesc : Order.AgeAsc;
-            var model = await _userService.GetAll(order, filterByName, pageSize, page);
+            var model = await _userService.GetAll(order, filterByName, page);
             
             return View(model);
         }

PhoneStore/Services/Abstractions/IUserService.cs

@@ -6,6 +6,6 @@ namespace PhoneStore.Services.Abstractions
 {
     public interface IUserService
     {
-        Task<UsersViewModel> GetAll(Order order, string filterByName, int pageSize, int page);
+        Task<UsersViewModel> GetAll(Order order, string filterByName, int page);
     }
 }
\ No newline at end of file

PhoneStore/Services/PaginationService.cs

@@ -12,7 +12,5 @@ namespace PhoneStore.Services
             int count = await elements.CountAsync();
             return (elements.Skip((page - 1) * pageSize).Take(pageSize), count);
         }
-
-        
     }
 }
\ No newline at end of file

PhoneStore/Services/UserService.cs

 using System.Threading.Tasks;
+using Microsoft.Extensions.Configuration;
 using PhoneStore.Helpers;
 using PhoneStore.Models;
 using PhoneStore.Services.Abstractions;
@@ -13,27 +14,31 @@ namespace PhoneStore.Services
         private readonly IUsersSortService _sortService;
         private readonly IUsersFilter _usersFilter;
         private readonly IPaginationService<User> _paginationService;
+        private readonly IConfiguration _configuration;
 
         public UserService(
             MobileContext db, 
             IUsersSortService sortService, 
             IUsersFilter usersFilter, 
-            IPaginationService<User> paginationService)
+            IPaginationService<User> paginationService, 
+            IConfiguration configuration)
         {
             _db = db;
             _sortService = sortService;
             _usersFilter = usersFilter;
             _paginationService = paginationService;
+            _configuration = configuration;
         }
 
-        public async Task<UsersViewModel> GetAll(Order order, string filterByName, int pageSize, int page)
+        public async Task<UsersViewModel> GetAll(Order order, string filterByName, int page)
         {
+            var pageSize = int.Parse(_configuration["UsersPageSize"]); //Размер страницы берется из appsettings.json
             var users = _db.Users.AsQueryable();
             var filteredUsers = _usersFilter.FilterByName(users, filterByName);
             var sortedUsers = _sortService.Sort(filteredUsers, order);
-            var paginationData = await _paginationService.GetABatchOfData(sortedUsers, page, pageSize);
+            var (queryable, count) = await _paginationService.GetABatchOfData(sortedUsers, page, pageSize);
             
-            return paginationData.Item1.MapToUsersViewModel(filterByName, page, paginationData.Item2, pageSize);
+            return queryable.MapToUsersViewModel(filterByName, page, count, pageSize);
         }
     }
 }
\ No newline at end of file

PhoneStore/appsettings.json

@@ -12,5 +12,6 @@
   "AllowedHosts": "*",
   "PathToDefaultAvatar": {
     "Path": "images\\phoneImages\\default.jpg"
-  }
+  },
+  "UsersPageSize" : 2
 }