Presence.API/Controllers/GroupController.cs

@@ -41,9 +41,64 @@ namespace Presence.API.Controllers
         public IActionResult DeleteGroup(int id)
         {
             RemoveGroupRequest removeGroupRequest = new() { GroupId = id };
-            _groupService.RemoveGroup(removeGroupRequest);
-            return NoContent();
+            bool isDeleted = _groupService.RemoveGroup(removeGroupRequest);
+            if (!isDeleted) return NotFound();
+            else return NoContent();
+        }
+
+        [HttpPost("/group")]
+        public ActionResult<GroupResponse> PostGroup(AddGroupRequest addGroupRequest)
+        {
+            if (addGroupRequest is null)
+                return BadRequest(new ArgumentNullException());
+
+            bool isCreated = _groupService.AddGroup(addGroupRequest);
+            if (isCreated) return CreatedAtAction(nameof(GetGroupByName), new { name = addGroupRequest.Name }, addGroupRequest );
+            else return BadRequest();
+        }
+/*
+        [HttpGet("/group/{id}")]
+        public ActionResult<GroupResponse> GetGroupById(int id)
+        {
+            var result = _groupService
+               .GetGroupsWithStudents()
+               .Where(g => g.Id == id)
+               .Select(group => new GroupResponse
+               {
+                   Id = group.Id,
+                   Name = group.Name,
+                   Users = group.Users?.Select(
+                       user => new UserResponse
+                       {
+                           Id = user.Id,
+                           LastName = user.LastName,
+                           FirstName = user.FirstName,
+                           Patronymic = user.Patronymic
+                       }).ToList()
+               }).ToList();
+            return result.Count > 0 ? Ok(result) : NotFound();
+        }
+*/
+        [HttpGet("/group/{name}")]
+        public ActionResult<GroupResponse> GetGroupByName(string name)
+        {
+            var result = _groupService
+               .GetGroupsWithStudents()
+               .Where(g => g.Name == name)
+               .Select(group => new GroupResponse
+               {
+                   Id = group.Id,
+                   Name = group.Name,
+                   Users = group.Users?.Select(
+                       user => new UserResponse
+                       {
+                           Id = user.Id,
+                           LastName = user.LastName,
+                           FirstName = user.FirstName,
+                           Patronymic = user.Patronymic
+                       }).ToList()
+               }).ToList();
+            return result.Count > 0 ? Ok(result) : NotFound();
         }
-        
     }
 }

Presence.API/Presence.API.csproj

@@ -10,10 +10,6 @@
     <PackageReference Include="Swashbuckle.AspNetCore" Version="6.6.2" />
   </ItemGroup>
 
-  <ItemGroup>
-    <Folder Include="Request\" />
-  </ItemGroup>
-
   <ItemGroup>
     <ProjectReference Include="..\data\data.csproj" />
     <ProjectReference Include="..\domain\domain.csproj" />

Presence.API/Request/AddGroupRequest.cs

@@ -0,0 +1,7 @@
+namespace Presence.API.Request
+{
+    public class AddGroupRequest
+    {
+        public string Name { get; set; }
+    }
+}

domain/Service/GroupService.cs

@@ -19,7 +19,7 @@ namespace domain.Service
             _groupRepository = groupRepository;
         }
 
-        public void AddGroup(AddGroupRequest addGroupRequest)
+        public bool AddGroup(AddGroupRequest addGroupRequest)
             => _groupRepository.CreateGroup(new Group { Name = addGroupRequest.Name });
         
 
@@ -60,7 +60,7 @@ namespace domain.Service
                 });
             }
 
-        public void RemoveGroup(RemoveGroupRequest removeGroupRequest)
+        public bool RemoveGroup(RemoveGroupRequest removeGroupRequest)
             => _groupRepository.DeleteGroup(removeGroupRequest.GroupId);
     }
 }

domain/UseCase/IGroupUseCase.cs

@@ -10,11 +10,11 @@ namespace domain.UseCase
 {
     public interface IGroupUseCase
     {
-        public void AddGroup(AddGroupRequest addGroupRequest);
+        public bool AddGroup(AddGroupRequest addGroupRequest);
 
         public void AddGroupWithStudents(AddGroupWithStudentRequest addGroupWithStudentRequest);
 
-        public void RemoveGroup(RemoveGroupRequest removeGroupRequest);
+        public bool RemoveGroup(RemoveGroupRequest removeGroupRequest);
 
         public void EditGroup(EditGroupRequest editGroupRequest);