Add active and ended game rule components, generic TryRoundStartAttempt and minPlayers field (#20564)

* Improve active game rule querying, add generic try round start attempt method, move minPlayers to GameRuleComponent

* Nukeops todo and cleanup

* Remove Active field

* Add EndedGameRuleComponent

Content.Server/GameTicking/Rules/GameRuleSystem.cs

@@ -1,9 +1,11 @@
+using Content.Server.Chat.Managers;
 using Content.Server.GameTicking.Rules.Components;
 
 namespace Content.Server.GameTicking.Rules;
 
 public abstract partial class GameRuleSystem<T> : EntitySystem where T : Component
 {
+    [Dependency] protected readonly IChatManager ChatManager = default!;
     [Dependency] protected readonly GameTicker GameTicker = default!;
 
     public override void Initialize()
@@ -36,6 +38,7 @@ public abstract partial class GameRuleSystem<T> : EntitySystem where T : Compone
         Ended(uid, component, ruleData, args);
     }
 
+
     /// <summary>
     /// Called when the gamerule is added
     /// </summary>
@@ -68,6 +71,36 @@ public abstract partial class GameRuleSystem<T> : EntitySystem where T : Compone
 
     }
 
+    protected EntityQueryEnumerator<ActiveGameRuleComponent, T, GameRuleComponent> QueryActiveRules()
+    {
+        return EntityQueryEnumerator<ActiveGameRuleComponent, T, GameRuleComponent>();
+    }
+
+    protected bool TryRoundStartAttempt(RoundStartAttemptEvent ev, string localizedPresetName)
+    {
+        var query = EntityQueryEnumerator<ActiveGameRuleComponent, T, GameRuleComponent>();
+        while (query.MoveNext(out _, out _, out _, out var gameRule))
+        {
+            var minPlayers = gameRule.MinPlayers;
+            if (!ev.Forced && ev.Players.Length < minPlayers)
+            {
+                ChatManager.SendAdminAnnouncement(Loc.GetString("preset-not-enough-ready-players",
+                    ("readyPlayersCount", ev.Players.Length), ("minimumPlayers", minPlayers),
+                    ("presetName", localizedPresetName)));
+                ev.Cancel();
+                continue;
+            }
+
+            if (ev.Players.Length == 0)
+            {
+                ChatManager.DispatchServerAnnouncement(Loc.GetString("preset-no-one-ready"));
+                ev.Cancel();
+            }
+        }
+
+        return !ev.Cancelled;
+    }
+
     public override void Update(float frameTime)
     {
         base.Update(frameTime);