Feature/form unique code (#383)

* -fixes get all notification bug
-fixes swagger configuration issue where authorization header is not inserted correctly

* -revert

* -revert

* -revert

* -check if form code/id already exists on form post request

* - small edits

Co-authored-by: Irina Borozan <[email protected]>

src/api/VoteMonitor.Api.Form/Controllers/FormController.cs

@@ -31,8 +31,19 @@ public FormController(IMediator mediator, IOptions<ApplicationCacheOptions> cach
 
         [HttpPost]
         [Authorize("NgoAdmin")]
-        public async Task<int> AddForm([FromBody] FormDTO newForm)
+        public async Task<ActionResult<int>> AddForm([FromBody] FormDTO newForm)
         {
+            var formExists = await _mediator.Send(new ExistsFormByCodeOrIdQuery()
+            {
+                Id = newForm.Id,
+                Code = newForm.Code
+            });
+
+            if (formExists)
+            {
+                return BadRequest($"The form with the given code/id already exists");
+            }
+
             var result = await _mediator.Send(new AddFormCommand { Form = newForm });
             return result.Id;
         }

src/api/VoteMonitor.Api.Form/Queries/ExistsFormByCodeOrIdQuery.cs

@@ -0,0 +1,10 @@
+using MediatR;
+
+namespace VoteMonitor.Api.Form.Queries
+{
+    public class ExistsFormByCodeOrIdQuery : IRequest<bool>
+    {
+        public int Id { get; set; }
+        public string Code { get; set; }
+    }
+}

src/api/VoteMonitor.Api.Form/QueryHandlers/GetFormExistsByCodeOrIdQueryHandler.cs

@@ -0,0 +1,23 @@
+using MediatR;
+using Microsoft.EntityFrameworkCore;
+using System.Threading;
+using System.Threading.Tasks;
+using VoteMonitor.Api.Form.Queries;
+using VoteMonitor.Entities;
+
+namespace VoteMonitor.Api.Form.QueryHandlers
+{
+    public class GetFormExistsByCodeOrIdQueryHandler : IRequestHandler<ExistsFormByCodeOrIdQuery, bool>
+    {
+        private readonly VoteMonitorContext _context;
+        public GetFormExistsByCodeOrIdQueryHandler(VoteMonitorContext voteMonitorContext)
+        {
+            _context = voteMonitorContext;
+        }
+
+        public async Task<bool> Handle(ExistsFormByCodeOrIdQuery request, CancellationToken cancellationToken)
+        {
+            return await _context.Forms.AnyAsync(form => form.Code == request.Code || form.Id == request.Id);
+        }
+    }
+}

src/api/VoteMonitor.Api.Form/QueryHandlers/GetFormExistsByIdQueryHandler.cs

@@ -9,7 +9,7 @@ namespace VoteMonitor.Api.Form.QueryHandlers
 {
     public class GetFormExistsByIdQueryHandler : IRequestHandler<GetFormExistsByIdQuery, bool>
     {
-        private VoteMonitorContext _context;
+        private readonly VoteMonitorContext _context;
 
         public GetFormExistsByIdQueryHandler(VoteMonitorContext voteMonitorContext)
         {