Get categories for specific user

Diligent.WebAPI.Business/Services/CategoryService.cs

@@ -23,5 +23,34 @@ namespace Diligent.WebAPI.Business.Services
 
         public async Task<Category> GetCategoryEntityById(int id) =>
             await _context.Categories.Where(x => x.Id == id).FirstOrDefaultAsync();
+
+        public async Task<List<IsGrantedCategory>> GetCategories(int userId)
+        {
+            var grantedCategories = await _context.UserCategories.Where(k => k.UserId == userId).ToListAsync();
+            var allCategories = await _context.Categories.ToListAsync();
+            var result = new List<IsGrantedCategory>();
+            for (int i = 0; i < allCategories.Count; i++)
+            {
+                var newCategory = new IsGrantedCategory
+                {
+                    Id = allCategories[i].Id,
+                    Name = allCategories[i].Name,
+                };
+                bool isGranted = false;
+                for (int j = 0; j < grantedCategories.Count; j++)
+                {
+                    if(grantedCategories[j].CategoryId == allCategories[i].Id && userId == grantedCategories[j].UserId)
+                    {
+                        isGranted = true;
+                        break;
+                    }
+                }
+                newCategory.IsChecked = isGranted;
+                result.Add(newCategory);
+                isGranted = false;
+            }
+
+            return result;
+        }
     }
 }

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

@@ -11,5 +11,6 @@ namespace Diligent.WebAPI.Business.Services.Interfaces
     {
         Task<List<CategoriesNamesResponse>> GetCategoriesNamesAsync();
         Task<Category> GetCategoryEntityById(int id);
+        Task<List<IsGrantedCategory>> GetCategories(int userId);
     }
 }

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

@@ -0,0 +1,9 @@
+namespace Diligent.WebAPI.Contracts.DTOs.Categories
+{
+    public class IsGrantedCategory
+    {
+        public int Id { get; set; }
+        public string Name { get; set; }
+        public bool IsChecked { get; set; }
+    }
+}

Diligent.WebAPI.Host/Controllers/V1/CategoriesController.cs

@@ -17,5 +17,9 @@ namespace Diligent.WebAPI.Host.Controllers.V1
         [HttpGet("names")]
         public async Task<IActionResult> GetCategoriesNames() =>
             Ok(await _categoryService.GetCategoriesNamesAsync());
+
+        [HttpGet("granted-categories")]
+        public async Task<IActionResult> GetCategories(int userId) =>
+            Ok(await _categoryService.GetCategories(userId));
     }
 }