A return to foam (foam rework) (#20831)

Content.Shared/Chemistry/Components/SmokeComponent.cs

@@ -0,0 +1,34 @@
+using Content.Shared.FixedPoint;
+using Content.Shared.Fluids.Components;
+using Robust.Shared.GameStates;
+
+namespace Content.Shared.Chemistry.Components;
+
+/// <summary>
+/// Stores solution on an anchored entity that has touch and ingestion reactions
+/// to entities that collide with it. Similar to <see cref="PuddleComponent"/>
+/// </summary>
+[RegisterComponent, NetworkedComponent, AutoGenerateComponentState]
+public sealed partial class SmokeComponent : Component
+{
+    public const string SolutionName = "solutionArea";
+
+    /// <summary>
+    /// The max amount of tiles this smoke cloud can spread to.
+    /// </summary>
+    [DataField, ViewVariables(VVAccess.ReadWrite)]
+    public int SpreadAmount;
+
+    /// <summary>
+    /// The max rate at which chemicals are transferred from the smoke to the person inhaling it.
+    /// Calculated as (total volume of chemicals in smoke) / (<see cref="Duration"/>)
+    /// </summary>
+    [DataField, ViewVariables(VVAccess.ReadWrite)]
+    public FixedPoint2 TransferRate;
+
+    /// <summary>
+    /// The total lifespan of the smoke.
+    /// </summary>
+    [DataField, ViewVariables(VVAccess.ReadWrite), AutoNetworkedField]
+    public float Duration = 10;
+}