Tile prying removes decals (#13363)

Content.Server/Maps/TileSystem.cs

@@ -0,0 +1,88 @@
+using Content.Server.Coordinates.Helpers;
+using Content.Server.Decals;
+using Content.Shared.Decals;
+using Content.Shared.Maps;
+using Robust.Shared.Map;
+using Robust.Shared.Random;
+
+namespace Content.Server.Maps;
+
+/// <summary>
+///     Handles server-side tile manipulation like prying/deconstructing tiles.
+/// </summary>
+public sealed class TileSystem : EntitySystem
+{
+    [Dependency] private readonly IMapManager _mapManager = default!;
+    [Dependency] private readonly ITileDefinitionManager _tileDefinitionManager = default!;
+    [Dependency] private readonly IRobustRandom _robustRandom = default!;
+    [Dependency] private readonly DecalSystem _decal = default!;
+
+    public bool PryTile(Vector2i indices, EntityUid gridId)
+    {
+        var grid = _mapManager.GetGrid(gridId);
+        var tileRef = grid.GetTileRef(indices);
+        return PryTile(tileRef);
+    }
+
+    public bool PryTile(TileRef tileRef)
+    {
+        var tile = tileRef.Tile;
+
+        if (tile.IsEmpty)
+            return false;
+
+        var tileDef = (ContentTileDefinition) _tileDefinitionManager[tile.TypeId];
+
+        if (!tileDef.CanCrowbar)
+            return false;
+
+        return DeconstructTile(tileRef);
+    }
+
+    public bool CutTile(TileRef tileRef)
+    {
+        var tile = tileRef.Tile;
+
+        if (tile.IsEmpty)
+            return false;
+
+        var tileDef = (ContentTileDefinition) _tileDefinitionManager[tile.TypeId];
+
+        if (!tileDef.CanWirecutter)
+            return false;
+
+        return DeconstructTile(tileRef);
+    }
+
+    private bool DeconstructTile(TileRef tileRef)
+    {
+        var indices = tileRef.GridIndices;
+
+        var tileDef = (ContentTileDefinition) _tileDefinitionManager[tileRef.Tile.TypeId];
+        var mapGrid = _mapManager.GetGrid(tileRef.GridUid);
+
+        const float margin = 0.1f;
+        var bounds = mapGrid.TileSize - margin * 2;
+        var coordinates = mapGrid.GridTileToLocal(indices)
+            .Offset(new Vector2(
+                (_robustRandom.NextFloat() - 0.5f) * bounds,
+                (_robustRandom.NextFloat() - 0.5f) * bounds));
+
+        //Actually spawn the relevant tile item at the right position and give it some random offset.
+        var tileItem = Spawn(tileDef.ItemDropPrototypeName, coordinates);
+        Transform(tileItem).LocalRotation = _robustRandom.NextDouble() * Math.Tau;
+
+        // Destroy any decals on the tile
+        var decals = _decal.GetDecalsInRange(tileRef.GridUid, coordinates.SnapToGrid(EntityManager, _mapManager).Position, 0.5f);
+        foreach (var (id, _) in decals)
+        {
+            _decal.RemoveDecal(tileRef.GridUid, id);
+        }
+
+        var plating = _tileDefinitionManager[tileDef.BaseTurfs[^1]];
+
+        mapGrid.SetTile(tileRef.GridIndices, new Tile(plating.TileId));
+
+        return true;
+    }
+}