Implemented history of nested folders

Diligent.WebAPI.Business/Services/CategoryService.cs

@@ -25,17 +25,29 @@ namespace Diligent.WebAPI.Business.Services
             _configuration = configuration;
         }
 
-        public async Task<List<CategoriesNamesResponse>> GetRootCategories(int userId,int parentCategoryId)
+        public async Task<CategoriesParentChild> GetRootCategories(int userId,int parentCategoryId)
         {
             var user = await _userManager.FindByIdAsync(userId.ToString());
             var role = (await _userManager.GetRolesAsync(user))[0];
 
             if (role == "SuperAdmin")
                 if (parentCategoryId == -1)
-                    return _mapper.Map<List<CategoriesNamesResponse>>
-                        (await _context.Categories.Where(k => k.ParentCategory == null).ToListAsync());
+                {
+                    return new CategoriesParentChild
+                    {
+                        Categories = _mapper.Map<List<CategoriesNamesResponse>>
+                        (await _context.Categories.Where(k => k.ParentCategory == null).ToListAsync()),
+                        ChildParentRelations = await GetByParentChild(parentCategoryId)
+                    };
+                }
                 else
-                    return await GetChildCategories(parentCategoryId, userId,role);
+                {
+                    return new CategoriesParentChild
+                    {
+                        Categories = await GetChildCategories(parentCategoryId, userId, role),
+                        ChildParentRelations = await GetByParentChild(parentCategoryId)
+                    };
+                }
 
             var userCategories = new List<UserCategories>();
 
@@ -45,9 +57,17 @@ namespace Diligent.WebAPI.Business.Services
                .Include(t => t.Category)
                .ToListAsync();
             else
-                return await GetChildCategories(parentCategoryId, userId,role);
+                return new CategoriesParentChild
+                {
+                    Categories = await GetChildCategories(parentCategoryId, userId, role),
+                    ChildParentRelations = await GetByParentChild(parentCategoryId)
+                };
 
-            return GetCategoriesFromUserCategories(userCategories);
+            return new CategoriesParentChild
+            {
+                Categories = GetCategoriesFromUserCategories(userCategories),
+                ChildParentRelations = await GetByParentChild(parentCategoryId)
+            };
         }
         public async Task<Category> GetCategoryEntityById(int? id) =>
             await _context.Categories.Where(x => x.Id == id).FirstOrDefaultAsync();
@@ -106,5 +126,27 @@ namespace Diligent.WebAPI.Business.Services
 
             return GetCategoriesFromUserCategories(userCategories);
         }
+
+        private async Task<List<CategoriesNamesResponse>> GetByParentChild(int categoryId)
+        {
+            var categories = await _context.Categories.Include(x => x.ParentCategory).ToListAsync();
+            var categoryById = categories.Where(x => x.Id == categoryId).FirstOrDefault();
+
+            List<CategoriesNamesResponse> dto = new();
+            while (true)
+            {
+                if (categoryById == null) break;
+                dto.Add(new CategoriesNamesResponse
+                {
+                    Id = categoryById.Id,
+                    Name = categoryById.Name
+                });
+                categoryById = categoryById.ParentCategory;
+            }
+
+            dto.Reverse();
+
+            return dto;
+        }
     }
 }

Diligent.WebAPI.Business/Services/Interfaces/ICategoryService.cs

@@ -9,7 +9,7 @@ namespace Diligent.WebAPI.Business.Services.Interfaces
 {
     public interface ICategoryService
     {
-        Task<List<CategoriesNamesResponse>> GetRootCategories(int userId,int categoryId);
+        Task<CategoriesParentChild> GetRootCategories(int userId,int categoryId);
         Task<Category> GetCategoryEntityById(int? id);
         Task<List<IsGrantedCategory>> GetCategories(int userId);
     }

Diligent.WebAPI.Contracts/DTOs/Categories/CategoriesParentChild.cs

@@ -0,0 +1,15 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Diligent.WebAPI.Contracts.DTOs.Categories
+{
+    public class CategoriesParentChild
+    {
+        public List<CategoriesNamesResponse> Categories { get; set; }
+
+        public List<CategoriesNamesResponse> ChildParentRelations { get; set; }
+    }
+}