Adds fixgridatmos command for mapping and admining

Content.Server/Atmos/IGridAtmosphereComponent.cs

@@ -155,6 +155,8 @@ namespace Content.Server.Atmos
         /// <returns></returns>
         float GetVolumeForCells(int cellCount);
 
+        void RepopulateTiles();
+
         /// <summary>
         ///     Returns a dictionary of adjacent TileAtmospheres.
         /// </summary>

Content.Server/Commands/Atmos/FillGasCommand.cs

@@ -1,5 +1,6 @@
 #nullable enable
 using Content.Server.Administration;
+using Content.Server.Atmos;
 using Content.Server.GameObjects.Components.Atmos;
 using Content.Shared.Administration;
 using Content.Shared.Atmos;
@@ -42,13 +43,13 @@ namespace Content.Server.Commands.Atmos
                 return;
             }
 
-            if (!grid.HasComponent<GridAtmosphereComponent>())
+            if (!grid.HasComponent<IGridAtmosphereComponent>())
             {
                 shell.WriteLine("Grid doesn't have an atmosphere.");
                 return;
             }
 
-            var gam = grid.GetComponent<GridAtmosphereComponent>();
+            var gam = grid.GetComponent<IGridAtmosphereComponent>();
 
             foreach (var tile in gam)
             {

Content.Server/Commands/Atmos/FixGridAtmos.cs

@@ -0,0 +1,74 @@
+#nullable enable
+using Content.Server.Administration;
+using Content.Server.Atmos;
+using Content.Server.GameObjects.Components.Atmos;
+using Content.Shared.Administration;
+using Content.Shared.Atmos;
+using Robust.Shared.Console;
+using Robust.Shared.GameObjects;
+using Robust.Shared.IoC;
+using Robust.Shared.Map;
+
+namespace Content.Server.Commands.Atmos
+{
+    [AdminCommand(AdminFlags.Debug)]
+    public class FixGridAtmos : IConsoleCommand
+    {
+        public string Command => "fixgridatmos";
+        public string Description => "Makes every tile on a grid have a roundstart gas mix.";
+        public string Help => $"{Command} <grid Ids>";
+        public void Execute(IConsoleShell shell, string argStr, string[] args)
+        {
+            if (args.Length == 0)
+            {
+                shell.WriteError("Not enough arguments.");
+                return;
+            }
+
+            var mapManager = IoCManager.Resolve<IMapManager>();
+            var entityManager = IoCManager.Resolve<IEntityManager>();
+
+            var mixture = new GasMixture(Atmospherics.CellVolume) { Temperature = Atmospherics.T20C };
+            mixture.AdjustMoles(Gas.Oxygen, Atmospherics.OxygenMolesStandard);
+            mixture.AdjustMoles(Gas.Nitrogen, Atmospherics.NitrogenMolesStandard);
+
+            foreach (var gid in args)
+            {
+                // I like offering detailed error messages, that's why I don't use one of the extension methods.
+                if (!int.TryParse(gid, out var i) || i <= 0)
+                {
+                    shell.WriteError($"Invalid grid ID \"{gid}\".");
+                    continue;
+                }
+
+                if (!mapManager.TryGetGrid(new GridId(i), out var grid))
+                {
+                    shell.WriteError($"Grid \"{i}\" doesn't exist.");
+                    continue;
+                }
+
+                if (!entityManager.TryGetEntity(grid.GridEntityId, out var entity))
+                {
+                    shell.WriteError($"Grid entity for grid \"{i}\" doesn't exist.");
+                    continue;
+                }
+
+                var gridAtmosphere = new GridAtmosphereComponent() {Owner = entity};
+
+                // Inject dependencies manually or a NRE will eat your face.
+                IoCManager.InjectDependencies(gridAtmosphere);
+
+                entityManager.ComponentManager.AddComponent(entity, gridAtmosphere, true);
+
+                gridAtmosphere.RepopulateTiles();
+
+                foreach (var tile in gridAtmosphere)
+                {
+                    tile.Air = (GasMixture) mixture.Clone();
+                    tile.Air.Volume = gridAtmosphere.GetVolumeForCells(1);
+                    tile.Invalidate();
+                }
+            }
+        }
+    }
+}