fix: cleanup unnecessary usings

TournamentOrganizer/Models/Game.cs

@@ -1,4 +1,3 @@
-using System;
 using System.Collections.Generic;
 using System.ComponentModel.DataAnnotations;
 using System.ComponentModel.DataAnnotations.Schema;

TournamentOrganizer/Models/Match.cs

@@ -1,4 +1,3 @@
-using System;
 using System.Collections.Generic;
 using System.ComponentModel.DataAnnotations;
 using System.ComponentModel.DataAnnotations.Schema;

TournamentOrganizer/Models/Participant.cs

@@ -1,7 +1,3 @@
-using System;
-using System.Collections.Generic;
-using System.ComponentModel.DataAnnotations;
-using System.ComponentModel.DataAnnotations.Schema;
 using Microsoft.EntityFrameworkCore;
 
 namespace TournamentOrganizer.Models;

TournamentOrganizer/Models/Round.cs

@@ -1,4 +1,3 @@
-using System;
 using System.Collections.Generic;
 using System.ComponentModel.DataAnnotations;
 using System.ComponentModel.DataAnnotations.Schema;

TournamentOrganizer/Models/Team.cs

@@ -1,4 +1,3 @@
-using System;
 using System.Collections.Generic;
 using System.ComponentModel.DataAnnotations;
 using System.ComponentModel.DataAnnotations.Schema;

TournamentOrganizer/Models/Tournament.cs

@@ -1,8 +1,6 @@
 using System;
-using System.Collections.Generic;
 using System.ComponentModel.DataAnnotations;
 using System.ComponentModel.DataAnnotations.Schema;
-using Microsoft.EntityFrameworkCore;
 
 namespace TournamentOrganizer.Models;
 
@@ -13,7 +11,9 @@ public class Tournament
     public int Id { get; set; }
     public int GameId { get; set; }
     public int EventId { get; set; }
+    [CustomValidation(typeof(Tournament), nameof(ValidateDates))]
     public DateTime Start { get; set; }
+    [CustomValidation(typeof(Tournament), nameof(ValidateDates))]
     public DateTime End { get; set; }
 
     public RuleSet S1RuleSet { get; set; }
@@ -24,4 +24,12 @@ public class Tournament
     public required Game Game { get; set; }
     public required Event Event { get; set; }
 
+    public static ValidationResult ValidateDates(DateTime date, ValidationContext context)
+    {
+        Tournament instance = (Tournament)context.ObjectInstance;
+        if (date >= instance.Event.Start && date <= instance.Event.End)
+            return ValidationResult.Success;
+        return new("Tournament must take place during the event.");
+    }
+
 }