Pulling rework (#20906)

* Pulling rework

Fixing up the FOUR systems managing pulling, all the shitcode, and also making it nicer ingame.

* More pulling cleanup

* stats

* More cleanup

* First draft

* More pulling

* weh

* Fix puller

* Pulling working

* Fix merge

* Dunked

* Self-merge time

Content.Shared/Movement/Pulling/Components/PullableComponent.cs

@@ -0,0 +1,39 @@
+using Robust.Shared.GameStates;
+
+namespace Content.Shared.Movement.Pulling.Components;
+
+/// <summary>
+/// Specifies an entity as being pullable by an entity with <see cref="PullerComponent"/>
+/// </summary>
+[RegisterComponent, NetworkedComponent, AutoGenerateComponentState]
+[Access(typeof(Systems.PullingSystem))]
+public sealed partial class PullableComponent : Component
+{
+    /// <summary>
+    /// The current entity pulling this component.
+    /// </summary>
+    [AutoNetworkedField, DataField]
+    public EntityUid? Puller;
+
+    /// <summary>
+    /// The pull joint.
+    /// </summary>
+    [AutoNetworkedField, DataField]
+    public string? PullJointId;
+
+    public bool BeingPulled => Puller != null;
+
+    /// <summary>
+    /// If the physics component has FixedRotation should we keep it upon being pulled
+    /// </summary>
+    [Access(typeof(Systems.PullingSystem), Other = AccessPermissions.ReadExecute)]
+    [ViewVariables(VVAccess.ReadWrite), DataField("fixedRotation")]
+    public bool FixedRotationOnPull;
+
+    /// <summary>
+    /// What the pullable's fixedrotation was set to before being pulled.
+    /// </summary>
+    [Access(typeof(Systems.PullingSystem), Other = AccessPermissions.ReadExecute)]
+    [AutoNetworkedField, DataField]
+    public bool PrevFixedRotation;
+}

Content.Shared/Movement/Pulling/Components/PullerComponent.cs

@@ -0,0 +1,41 @@
+using Content.Shared.Movement.Pulling.Systems;
+using Robust.Shared.GameStates;
+using Robust.Shared.Serialization.TypeSerializers.Implementations.Custom;
+
+namespace Content.Shared.Movement.Pulling.Components;
+
+/// <summary>
+/// Specifies an entity as being able to pull another entity with <see cref="PullableComponent"/>
+/// </summary>
+[RegisterComponent, NetworkedComponent, AutoGenerateComponentState]
+[Access(typeof(PullingSystem))]
+public sealed partial class PullerComponent : Component
+{
+    // My raiding guild
+    /// <summary>
+    /// Next time the puller can throw what is being pulled.
+    /// Used to avoid spamming it for infinite spin + velocity.
+    /// </summary>
+    [DataField(customTypeSerializer: typeof(TimeOffsetSerializer)), AutoNetworkedField]
+    public TimeSpan NextThrow;
+
+    [DataField]
+    public TimeSpan ThrowCooldown = TimeSpan.FromSeconds(1);
+
+    // Before changing how this is updated, please see SharedPullerSystem.RefreshMovementSpeed
+    public float WalkSpeedModifier => Pulling == default ? 1.0f : 0.95f;
+
+    public float SprintSpeedModifier => Pulling == default ? 1.0f : 0.95f;
+
+    /// <summary>
+    /// Entity currently being pulled if applicable.
+    /// </summary>
+    [AutoNetworkedField, DataField]
+    public EntityUid? Pulling;
+
+    /// <summary>
+    ///     Does this entity need hands to be able to pull something?
+    /// </summary>
+    [DataField]
+    public bool NeedsHands = true;
+}