Refactored endpoints to be more functional and more expressive

PostFundManagement.Api/Endpoints/Projects/GetProjectEndpoint.cs

@@ -1,9 +1,11 @@
 using PostFundManagement.Application.Extensions;
 using PostFundManagement.Application.Services.Projects;
 using PostFundManagement.Domain.Abstractions;
+using PostFundManagement.Domain.Errors;
 using PostFundManagement.Domain.Extensions;
 using PostFundManagement.Domain.Models;
 using PostFundManagement.Domain.Security;
+using Problems = Microsoft.AspNetCore.Mvc.ProblemDetails;
 
 namespace PostFundManagement.Api.Endpoints.Projects;
 
@@ -14,19 +16,21 @@ public class GetProjectEndpoint : IEndpoint
     {
         builder.MapGet("api/projects/{projectId}", async (string projectId, ProjectService service,
             CancellationToken cancellationToken = default) =>
-        {
-            var result = await service.GetProjectAsync(projectId, cancellationToken);
-
-            return result.IsSuccess
-                ? Results.Ok(result.Value)
-                : Results.NotFound();
-        })
-        .WithDescription("Get project by ID")
-        .WithName(typeof(GetProjectEndpoint).ToEndpointName())
-        .MapToApiVersion(new ApiVersion(1))
-        .Produces<Project[]>(StatusCodes.Status200OK)
-        .Produces(StatusCodes.Status404NotFound)
-        .Produces(StatusCodes.Status401Unauthorized)
-        .WithTags(EndpointTags.Projects);
+                await service.GetProjectAsync(projectId, cancellationToken) switch
+                {
+                    { IsSuccess: true, Value: var project } => Results.Ok(project),
+                    var r when r.HasError<IdDecodeError>() => Results.Forbid(),
+                    var r when r.HasError<NotFoundError>() => Results.NotFound(),
+                    var r => Results.InternalServerError(r.Errors.ToProblems())
+                })
+            .WithDescription("Get project by ID")
+            .WithName(typeof(GetProjectEndpoint).ToEndpointName())
+            .MapToApiVersion(new ApiVersion(1))
+            .Produces<Project[]>(StatusCodes.Status200OK)
+            .Produces(StatusCodes.Status404NotFound)
+            .Produces(StatusCodes.Status403Forbidden)
+            .Produces(StatusCodes.Status401Unauthorized)
+            .Produces<Problems>(StatusCodes.Status500InternalServerError)
+            .WithTags(EndpointTags.Projects);
     }
 }