Salvage dungeons (#14520)

Content.Shared/Procedural/PostGeneration/EntrancePostGen.cs

@@ -0,0 +1,23 @@
+using Content.Shared.Maps;
+using Robust.Shared.Prototypes;
+using Robust.Shared.Serialization.TypeSerializers.Implementations.Custom.Prototype;
+
+namespace Content.Shared.Procedural.PostGeneration;
+
+/// <summary>
+/// Selects [count] rooms and places external doors to them.
+/// </summary>
+public sealed class EntrancePostGen : IPostDunGen
+{
+    /// <summary>
+    /// How many rooms we place doors on.
+    /// </summary>
+    [DataField("count")]
+    public int Count = 1;
+
+    [DataField("door", customTypeSerializer:typeof(PrototypeIdSerializer<EntityPrototype>))]
+    public string Door = "AirlockGlass";
+
+    [DataField("tile", customTypeSerializer:typeof(PrototypeIdSerializer<ContentTileDefinition>))]
+    public string Tile = "FloorSteel";
+}