feat: add queries for the campus

Application/Cqrs/Campus/Queries/GetCampusDetails/GetCampusDetailsQueryHandler.cs

@@ -0,0 +1,27 @@
+using System.Globalization;
+using System.Linq;
+using MediatR;
+using Mirea.Api.DataAccess.Application.Cqrs.Campus.Queries.GetCampusBasicInfoList;
+using Mirea.Api.DataAccess.Application.Interfaces.DbContexts.Schedule;
+using System.Threading.Tasks;
+using System.Threading;
+using Microsoft.EntityFrameworkCore;
+using Mirea.Api.DataAccess.Application.Common.Exceptions;
+
+namespace Mirea.Api.DataAccess.Application.Cqrs.Campus.Queries.GetCampusDetails;
+
+public class GetCampusDetailsQueryHandler(ICampusDbContext dbContext) : IRequestHandler<GetCampusDetailsQuery, CampusDetailsVm>
+{
+    public async Task<CampusDetailsVm> Handle(GetCampusDetailsQuery request, CancellationToken cancellationToken)
+    {
+        var campus = await dbContext.Campuses.FirstOrDefaultAsync(c => c.Id == request.Id, cancellationToken) ?? throw new NotFoundException(typeof(Domain.Schedule.Campus), request.Id);
+
+        return new CampusDetailsVm()
+        {
+            Id = campus.Id,
+            CodeName = campus.CodeName,
+            FullName = campus.FullName,
+            Address = campus.Address
+        };
+    }
+}