Map pool cvar (#12313)

* it just works

* nuke votable

* whoops

Content.Server/Maps/GameMapManager.cs

@@ -68,7 +68,22 @@ public sealed class GameMapManager : IGameMapManager
 
     public IEnumerable<GameMapPrototype> AllVotableMaps()
     {
-        return _prototypeManager.EnumeratePrototypes<GameMapPrototype>().Where(x => x.Votable);
+        if (_prototypeManager.TryIndex<GameMapPoolPrototype>(_configurationManager.GetCVar(CCVars.GameMapPool), out var pool))
+        {
+            foreach (var map in pool.Maps)
+            {
+                if (!_prototypeManager.TryIndex<GameMapPrototype>(map, out var mapProto))
+                {
+                    Logger.Error("Couldn't index map " + map + " in pool " + pool.ID);
+                    continue;
+                }
+
+                yield return mapProto;
+            }
+        } else
+        {
+            throw new Exception("Could not index map pool prototype " + _configurationManager.GetCVar(CCVars.GameMapPool) + "!");
+        }
     }
 
     public IEnumerable<GameMapPrototype> AllMaps()
@@ -170,7 +185,6 @@ public sealed class GameMapManager : IGameMapManager
     {
         Logger.InfoS("mapsel", string.Join(", ", _previousMaps));
         var eligible = CurrentlyEligibleMaps()
-            .Where(x => x.Votable)
             .Select(x => (proto: x, weight: GetMapQueuePriority(x.ID)))
             .OrderByDescending(x => x.weight).ToArray();
         Logger.InfoS("mapsel", string.Join(", ", eligible.Select(x => (x.proto.ID, x.weight))));

Content.Server/Maps/GameMapPoolPrototype.cs

@@ -0,0 +1,22 @@
+using JetBrains.Annotations;
+using Robust.Shared.Prototypes;
+using Robust.Shared.Serialization.TypeSerializers.Implementations.Custom.Prototype.Set;
+
+namespace Content.Server.Maps;
+
+/// <summary>
+/// Prototype that holds a pool of maps that can be indexed based on the map pool CCVar.
+/// </summary>
+[Prototype("gameMapPool"), PublicAPI]
+public sealed class GameMapPoolPrototype : IPrototype
+{
+    /// <inheritdoc/>
+    [IdDataField]
+    public string ID { get; } = default!;
+
+    /// <summary>
+    ///     Which maps are in this pool.
+    /// </summary>
+    [DataField("maps", customTypeSerializer:typeof(PrototypeIdHashSetSerializer<GameMapPrototype>), required: true)]
+    public readonly HashSet<string> Maps = new(0);
+}

Content.Server/Maps/GameMapPrototype.MapSelection.cs

@@ -8,12 +8,6 @@ public sealed partial class GameMapPrototype
     [DataField("fallback")]
     public bool Fallback { get; }
 
-    /// <summary>
-    /// Controls if the map can be voted for.
-    /// </summary>
-    [DataField("votable")]
-    public bool Votable { get; } = true;
-
     /// <summary>
     /// Minimum players for the given map.
     /// </summary>