Revert 'Revert 'Solution Entities'' (#23168)

Content.Shared/Chemistry/Components/SolutionManager/ContainedSolutionComponent.cs

@@ -0,0 +1,31 @@
+using Content.Shared.Chemistry.EntitySystems;
+using Robust.Shared.GameStates;
+using Robust.Shared.Serialization;
+
+namespace Content.Shared.Chemistry.Components.SolutionManager;
+
+/// <summary>
+/// Component used to relate a solution to its container.
+/// </summary>
+/// <remarks>
+/// When containers are finally ECS'd have this attach to the container entity.
+/// The <see cref="Solution.MaxVolume"/> field should then be extracted out into this component.
+/// Solution entities would just become an apporpriately composed entity hanging out in the container.
+/// Will probably require entities in components being given a relation to associate themselves with their container.
+/// </remarks>
+[RegisterComponent, NetworkedComponent, AutoGenerateComponentState]
+[Access(typeof(SharedSolutionContainerSystem))]
+public sealed partial class ContainedSolutionComponent : Component
+{
+    /// <summary>
+    /// The entity that the solution is contained in.
+    /// </summary>
+    [DataField(required: true), AutoNetworkedField]
+    public EntityUid Container;
+
+    /// <summary>
+    /// The name/key of the container the solution is located in.
+    /// </summary>
+    [DataField(required: true), AutoNetworkedField]
+    public string ContainerName = default!;
+}