add tag service

Diligent.WebAPI.Business/Services/FileEntityService.cs

@@ -34,7 +34,6 @@ namespace Diligent.WebAPI.Business.Services
         public async Task UploadFileAsync(FileEntity file)
         {
             await _context.Files.AddAsync(file);
-
             await _context.SaveChangesAsync();
         }
 

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

@@ -9,6 +9,7 @@ namespace Diligent.WebAPI.Business.Services.Interfaces
         Task<FileFiltersReturnDTO> GetFilters();
         Task<List<TagNameResponse>> GetTagsNames();
         Task<Tag> GetTagEntityById(int id);
+        Task CreateTag(string name);
 
     }
 }

Diligent.WebAPI.Business/Services/TagService.cs

@@ -45,5 +45,11 @@ namespace Diligent.WebAPI.Business.Services
 
         public async Task<Tag> GetTagEntityById(int id) =>
             await _databaseContext.Tags.Where(x => x.Id == id).FirstOrDefaultAsync();
+
+        public async Task CreateTag(string name)
+        {
+            await _databaseContext.Tags.AddAsync(new Tag { Name = name });
+            await _databaseContext.SaveChangesAsync();
+        }
     }
 }

Diligent.WebAPI.Contracts/DTOs/Tags/CreateTagDto.cs

@@ -0,0 +1,13 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Diligent.WebAPI.Contracts.DTOs.Tags
+{
+    public class CreateTagDto
+    {
+        public string Name { get; set; }
+    }
+}

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

@@ -21,5 +21,12 @@ namespace Diligent.WebAPI.Host.Controllers.V1
 
         [HttpGet("names")]
         public async Task<IActionResult> GetTagsNames() => Ok(await _tagService.GetTagsNames());
+
+        [HttpPost]
+        public async Task<IActionResult> CreateTag(CreateTagDto createTagDto)
+        {
+            await _tagService.CreateTag(createTagDto.Name);
+            return StatusCode((int)HttpStatusCode.Created);
+        }
     }
 }

Diligent.WebAPI.Host/Extensions/BusinessConfigurationExtension.cs

@@ -42,9 +42,9 @@ namespace Diligent.WebAPI.Host.Extensions
             services.AddScoped<IScreeningTestService, ScreeningTestService>();
             services.AddScoped<IFileService, FileService>();
             services.AddScoped<IFileEntityService, FileEntityService>();
-            services.AddScoped<ITagService, TagService>();
             services.AddScoped<ICategoryService, CategoryService>();
             services.AddScoped<IDocumentService, DocumentService>();
+            services.AddScoped<ITagService, TagService>();
         }
 
         /// <summary>