Implemented domain order. Fixed some bugs

Moonlight/App/Models/Forms/DomainOrderDataModel.cs

@@ -0,0 +1,15 @@
+using System.ComponentModel.DataAnnotations;
+using Moonlight.App.Database.Entities;
+
+namespace Moonlight.App.Models.Forms;
+
+public class DomainOrderDataModel
+{
+    [Required(ErrorMessage = "You need to specify a name")]
+    [MaxLength(32, ErrorMessage = "The max lenght for the name is 32 characters")]
+    [RegularExpression(@"^[a-z]+$", ErrorMessage = "The name should only consist of lower case characters")]
+    public string Name { get; set; } = "";
+    
+    [Required(ErrorMessage = "You need to specify a shared domain")]
+    public SharedDomain SharedDomain { get; set; }
+}

Moonlight/App/Services/DomainService.cs

@@ -48,6 +48,28 @@ public class DomainService
         );
     }
 
+    public Task<Domain> Create(string domain, SharedDomain sharedDomain, User user)
+    {
+        if (DomainRepository.Get().Where(x => x.SharedDomain.Id == sharedDomain.Id).Any(x => x.Name == domain))
+            throw new DisplayException("A domain with this name does already exist for this shared domain");
+        
+        var res = DomainRepository.Add(new()
+        {
+            Name = domain,
+            SharedDomain = sharedDomain,
+            Owner = user
+        });
+
+        return Task.FromResult(res);
+    }
+
+    public Task Delete(Domain domain)
+    {
+        DomainRepository.Delete(domain);
+        
+        return Task.CompletedTask;
+    }
+
     public async Task<Zone[]>
         GetAvailableDomains() // This method returns all available domains which are not added as a shared domain
     {