Component of planet initialization on the map (#26510)

* no cl no fun

* DevPlanet

* fix europa?

* Update Content.Server/Station/Components/StationBiomeComponent.cs

* Update Content.Server/Station/Components/StationBiomeComponent.cs

---------

Co-authored-by: metalgearsloth <31366439+metalgearsloth@users.noreply.github.com>

Content.Server/Station/Components/StationBiomeComponent.cs

@@ -0,0 +1,19 @@
+using Content.Server.Station.Systems;
+using Content.Shared.Parallax.Biomes;
+using Robust.Shared.Prototypes;
+
+namespace Content.Server.Station.Components;
+
+/// <summary>
+/// Runs EnsurePlanet against the largest grid on Mapinit.
+/// </summary>
+[RegisterComponent, Access(typeof(StationBiomeSystem))]
+public sealed partial class StationBiomeComponent : Component
+{
+    [DataField(required: true)]
+    public ProtoId<BiomeTemplatePrototype> Biome = "Grasslands";
+
+    // If null, its random
+    [DataField]
+    public int? Seed = null;
+}

Content.Server/Station/Systems/StationBiomeSystem.cs

@@ -0,0 +1,35 @@
+using Content.Server.Parallax;
+using Content.Server.Station.Components;
+using Content.Server.Station.Events;
+using Content.Server.Station.Systems;
+using Robust.Shared.Map;
+using Robust.Shared.Prototypes;
+
+namespace Content.Server.Station.Systems;
+public sealed partial class StationBiomeSystem : EntitySystem
+{
+    [Dependency] private readonly BiomeSystem _biome = default!;
+    [Dependency] private readonly IMapManager _mapManager = default!;
+    [Dependency] private readonly IPrototypeManager _proto = default!;
+    [Dependency] private readonly StationSystem _station = default!;
+
+    public override void Initialize()
+    {
+        base.Initialize();
+        SubscribeLocalEvent<StationBiomeComponent, StationPostInitEvent>(OnStationPostInit);
+    }
+
+    private void OnStationPostInit(Entity<StationBiomeComponent> map, ref StationPostInitEvent args)
+    {
+        if (!TryComp(map, out StationDataComponent? dataComp))
+            return;
+
+        var station = _station.GetLargestGrid(dataComp);
+        if (station == null) return;
+
+        var mapId = Transform(station.Value).MapID;
+        var mapUid = _mapManager.GetMapEntityId(mapId);
+
+        _biome.EnsurePlanet(mapUid, _proto.Index(map.Comp.Biome), map.Comp.Seed);
+    }
+}

Resources/Prototypes/Maps/europa.yml

@@ -8,6 +8,8 @@
     Europa:
       stationProto: StandardNanotrasenStation
       components:
+        - type: StationBiome
+          biome: Snow
         - type: StationRandomTransform
           enableStationRotation: false
           maxStationOffset: null