Initial commit

Content.Client/Rootable/RootableSystem.cs

@@ -0,0 +1,8 @@
+using Content.Shared.Rootable;
+
+namespace Content.Client.Rootable;
+
+public sealed class RootableSystem : SharedRootableSystem
+{
+
+}

Content.Server/Damage/Systems/DamageUserOnTriggerSystem.cs

@@ -1,8 +1,6 @@
-using Content.Server.Damage.Components;
 using Content.Server.Explosion.EntitySystems;
 using Content.Shared.Damage;
-using Content.Shared.StepTrigger;
-using Content.Shared.StepTrigger.Systems;
+using Content.Shared.Damage.Components;
 
 namespace Content.Server.Damage.Systems;
 

Content.Server/Rootable/RootableSystem.cs

@@ -0,0 +1,97 @@
+using Content.Server.Body.Components;
+using Content.Server.Body.Systems;
+using Content.Shared.Administration.Logs;
+using Content.Shared.Chemistry;
+using Content.Shared.Chemistry.Components;
+using Content.Shared.Chemistry.EntitySystems;
+using Content.Shared.Chemistry.Reagent;
+using Content.Shared.Database;
+using Content.Shared.FixedPoint;
+using Content.Shared.Fluids.Components;
+using Content.Shared.Rootable;
+using Robust.Shared.Prototypes;
+using Robust.Shared.Timing;
+
+namespace Content.Server.Rootable;
+
+/// <summary>
+/// Adds an action to toggle rooting to the ground, primarily for the Diona species.
+/// </summary>
+public sealed class RootableSystem : SharedRootableSystem
+{
+
+    [Dependency] private readonly ISharedAdminLogManager _logger = default!;
+    [Dependency] private readonly IGameTiming _timing = default!;
+    [Dependency] private readonly SharedSolutionContainerSystem _solutionContainerSystem = default!;
+    [Dependency] private readonly IPrototypeManager _prototype = default!;
+    [Dependency] private readonly ReactiveSystem _reactive = default!;
+    [Dependency] private readonly BloodstreamSystem _blood = default!;
+
+    public override void Update(float frameTime)
+    {
+        base.Update(frameTime);
+
+        var query = EntityQueryEnumerator<RootableComponent>();
+        var curTime = _timing.CurTime;
+        while (query.MoveNext(out var uid, out var rooted))
+        {
+            if (!rooted.Rooted || rooted.PuddleEntity == null || curTime < rooted.NextSecond)
+                continue;
+
+            rooted.NextSecond += TimeSpan.FromSeconds(1);
+
+            PuddleReact(uid, rooted.PuddleEntity.Value);
+        }
+    }
+
+    /// <summary>
+    /// Determines if the puddle is set up properly and if so, moves on to reacting.
+    /// </summary>
+    private void PuddleReact(EntityUid entity, EntityUid puddleUid, RootableComponent? rootableComponent = null, PuddleComponent? puddleComponent = null)
+    {
+        if (!Resolve(entity, ref rootableComponent) || !Resolve(puddleUid, ref puddleComponent))
+            return;
+
+        if (!_solutionContainerSystem.ResolveSolution(puddleUid, puddleComponent.SolutionName, ref puddleComponent.Solution, out var solution) ||
+            solution.Contents.Count == 0)
+        {
+            return;
+        }
+
+        ReactWithEntity(entity, puddleUid, solution, rootableComponent, puddleComponent);
+    }
+
+    /// <summary>
+    /// Attempt to transfer an amount of the solution to the entity's bloodstream.
+    /// </summary>
+    private void ReactWithEntity(EntityUid entity, EntityUid puddleUid, Solution solution, RootableComponent? rootableComponent = null, PuddleComponent? puddleComponent = null)
+    {
+        if (!Resolve(entity, ref rootableComponent) || !Resolve(puddleUid, ref puddleComponent) || puddleComponent.Solution == null)
+            return;
+
+        if (!TryComp<BloodstreamComponent>(entity, out var bloodstream))
+            return;
+
+        if (!_solutionContainerSystem.ResolveSolution(entity, bloodstream.ChemicalSolutionName, ref bloodstream.ChemicalSolution, out var chemSolution) || chemSolution.AvailableVolume <= 0)
+            return;
+
+        var availableTransfer = FixedPoint2.Min(solution.Volume, rootableComponent.TransferRate);
+        var transferAmount = FixedPoint2.Min(availableTransfer, chemSolution.AvailableVolume);
+        var transferSolution = _solutionContainerSystem.SplitSolution(puddleComponent.Solution.Value, transferAmount);
+
+        foreach (var reagentQuantity in transferSolution.Contents.ToArray())
+        {
+            if (reagentQuantity.Quantity == FixedPoint2.Zero)
+                continue;
+            var reagentProto = _prototype.Index<ReagentPrototype>(reagentQuantity.Reagent.Prototype);
+
+            _reactive.ReactionEntity(entity, ReactionMethod.Ingestion, reagentProto, reagentQuantity, transferSolution);
+        }
+
+        if (_blood.TryAddToChemicals(entity, transferSolution, bloodstream))
+        {
+            // Log solution addition by puddle
+            _logger.Add(LogType.ForceFeed, LogImpact.Medium, $"{ToPrettyString(entity):target} absorbed puddle {SharedSolutionContainerSystem.ToPrettyString(transferSolution)}");
+        }
+    }
+}

Content.Server/Damage/Components/DamageUserOnTriggerComponent.cs → Content.Shared/Damage/Components/DamageUserOnTriggerComponent.cs

@@ -1,6 +1,4 @@
-using Content.Shared.Damage;
-
-namespace Content.Server.Damage.Components;
+namespace Content.Shared.Damage.Components;
 
 [RegisterComponent]
 public sealed partial class DamageUserOnTriggerComponent : Component

Content.Shared/Rootable/RootableComponent.cs

@@ -0,0 +1,54 @@
+using Content.Shared.Alert;
+using Content.Shared.FixedPoint;
+using Robust.Shared.GameStates;
+using Robust.Shared.Prototypes;
+using Robust.Shared.Serialization.TypeSerializers.Implementations.Custom;
+
+namespace Content.Shared.Rootable;
+
+/// <summary>
+/// A rooting action, for Diona.
+/// </summary>
+[RegisterComponent, NetworkedComponent, AutoGenerateComponentState, AutoGenerateComponentPause]
+public sealed partial class RootableComponent : Component
+{
+    [DataField]
+    public EntProtoId Action = "ActionToggleRootable";
+
+    [DataField]
+    public ProtoId<AlertPrototype> RootedAlert = "Rooted";
+
+    [DataField]
+    public EntityUid? ActionEntity;
+
+    /// <summary>
+    /// Is the entity currently rooted?
+    /// </summary>
+    [DataField, AutoNetworkedField]
+    public bool Rooted = false;
+
+    /// <summary>
+    /// The puddle that is currently affecting this entity.
+    /// </summary>
+    [DataField]
+    public EntityUid? PuddleEntity;
+
+    /// <summary>
+    /// The time at which the next absorption metabolism will occur.
+    /// </summary>
+    [DataField(customTypeSerializer: typeof(TimeOffsetSerializer))]
+    [AutoPausedField]
+    public TimeSpan NextSecond;
+
+    /// <summary>
+    /// The max rate at which chemicals are transferred from the puddle to the rooted entity.
+    /// </summary>
+    [DataField]
+    public FixedPoint2 TransferRate = 0.75;
+
+    /// <summary>
+    /// The movement speed modifier for when rooting is active.
+    /// </summary>
+    [DataField]
+    public float SpeedModifier = 0.8f;
+}

Content.Shared/Rootable/SharedRootableSystem.cs

@@ -0,0 +1,154 @@
+using Content.Shared.Damage.Components;
+using Content.Shared.Actions;
+using Content.Shared.Alert;
+using Content.Shared.Fluids.Components;
+using Content.Shared.Gravity;
+using Content.Shared.Mobs;
+using Content.Shared.Movement.Systems;
+using Content.Shared.Slippery;
+using Content.Shared.Toggleable;
+using Robust.Shared.Physics.Components;
+using Robust.Shared.Physics.Events;
+using Robust.Shared.Physics.Systems;
+using Robust.Shared.Timing;
+
+namespace Content.Shared.Rootable;
+
+/// <summary>
+/// Adds an action to toggle rooting to the ground, primarily for the Diona species.
+/// </summary>
+public abstract class SharedRootableSystem : EntitySystem
+{
+    [Dependency] private readonly IGameTiming _timing = default!;
+    [Dependency] private readonly SharedActionsSystem _actions = default!;
+    [Dependency] private readonly SharedGravitySystem _gravity = default!;
+    [Dependency] private readonly SharedPhysicsSystem _physics = default!;
+    [Dependency] private readonly IEntityManager _entityManager = default!;
+    [Dependency] private readonly MovementSpeedModifierSystem _movementSpeedModifier = default!;
+    [Dependency] private readonly AlertsSystem _alerts = default!;
+
+    private EntityQuery<PuddleComponent> _puddleQuery;
+
+    public override void Initialize()
+    {
+        base.Initialize();
+
+        _puddleQuery = GetEntityQuery<PuddleComponent>();
+
+        SubscribeLocalEvent<RootableComponent, MapInitEvent>(OnRootableMapInit);
+        SubscribeLocalEvent<RootableComponent, ComponentShutdown>(OnRootableShutdown);
+        SubscribeLocalEvent<RootableComponent, StartCollideEvent>(OnStartCollide);
+        SubscribeLocalEvent<RootableComponent, EndCollideEvent>(OnEndCollide);
+        SubscribeLocalEvent<RootableComponent, ToggleActionEvent>(OnRootableToggle);
+        SubscribeLocalEvent<RootableComponent, MobStateChangedEvent>(OnMobStateChanged);
+        SubscribeLocalEvent<RootableComponent, IsWeightlessEvent>(OnIsWeightless);
+        SubscribeLocalEvent<RootableComponent, SlipAttemptEvent>(OnSlipAttempt);
+        SubscribeLocalEvent<RootableComponent, RefreshMovementSpeedModifiersEvent>(OnRefreshMovementSpeed);
+    }
+
+    private void OnRootableMapInit(EntityUid uid, RootableComponent component, MapInitEvent args)
+    {
+        _actions.AddAction(uid, ref component.ActionEntity, component.Action, uid);
+    }
+
+    private void OnRootableShutdown(EntityUid uid, RootableComponent component, ComponentShutdown args)
+    {
+        _actions.RemoveAction(uid, component.ActionEntity);
+    }
+
+    private void OnRootableToggle(EntityUid uid, RootableComponent component, ref ToggleActionEvent args)
+    {
+        args.Handled = TryToggleRooting(uid, rooted: component);
+    }
+
+    private void OnMobStateChanged(EntityUid uid, RootableComponent component, MobStateChangedEvent args)
+    {
+        if (component.Rooted)
+            TryToggleRooting(uid, rooted: component);
+    }
+
+    public bool TryToggleRooting(EntityUid uid, RootableComponent? rooted = null)
+    {
+        if (!Resolve(uid, ref rooted))
+            return false;
+
+        rooted.Rooted = !rooted.Rooted;
+        _movementSpeedModifier.RefreshMovementSpeedModifiers(uid);
+        Dirty(uid, rooted);
+
+        if (rooted.Rooted)
+            _alerts.ShowAlert(uid, rooted.RootedAlert);
+        else
+            _alerts.ClearAlert(uid, rooted.RootedAlert);
+
+        return true;
+    }
+
+    private void OnIsWeightless(Entity<RootableComponent> ent, ref IsWeightlessEvent args)
+    {
+        if (args.Handled || !ent.Comp.Rooted)
+            return;
+
+        // do not cancel weightlessness if the person is in off-grid.
+        if (!_gravity.EntityOnGravitySupportingGridOrMap(ent.Owner))
+            return;
+
+        args.IsWeightless = false;
+        args.Handled = true;
+    }
+
+    private void OnSlipAttempt(Entity<RootableComponent> ent, ref SlipAttemptEvent args)
+    {
+        if (!ent.Comp.Rooted)
+            return;
+
+        if (args.SlipCausingEntity != null && HasComp<DamageUserOnTriggerComponent>(args.SlipCausingEntity))
+            return;
+
+        args.NoSlip = true;
+    }
+
+    private void OnStartCollide(Entity<RootableComponent> entity, ref StartCollideEvent args)
+    {
+        if (!_entityManager.HasComponent<PuddleComponent>(args.OtherEntity))
+        {
+            return;
+        }
+
+        entity.Comp.PuddleEntity = args.OtherEntity;
+
+        if (entity.Comp.NextSecond < _timing.CurTime) // To prevent constantly moving to new puddles resetting the timer
+            entity.Comp.NextSecond = _timing.CurTime + TimeSpan.FromSeconds(1);
+    }
+
+    private void OnEndCollide(Entity<RootableComponent> entity, ref EndCollideEvent args)
+    {
+        if (entity.Comp.PuddleEntity != args.OtherEntity)
+            return;
+
+        var exists = Exists(args.OtherEntity);
+
+        if (!TryComp<PhysicsComponent>(entity, out var body))
+            return;
+
+        foreach (var ent in _physics.GetContactingEntities(entity, body))
+        {
+            if (exists && ent == args.OtherEntity)
+                continue;
+
+            if (!_puddleQuery.HasComponent(ent))
+                continue;
+
+            entity.Comp.PuddleEntity = ent;
+            return; // New puddle found, no need to continue
+        }
+
+        entity.Comp.PuddleEntity = null;
+    }
+
+    private void OnRefreshMovementSpeed(Entity<RootableComponent> entity, ref RefreshMovementSpeedModifiersEvent args)
+    {
+        if (entity.Comp.Rooted)
+            args.ModifySpeed(entity.Comp.SpeedModifier);
+    }
+}

Content.Shared/Slippery/SlipperySystem.cs

@@ -19,7 +19,7 @@
 
 namespace Content.Shared.Slippery;
 
-[UsedImplicitly] 
+[UsedImplicitly]
 public sealed class SlipperySystem : EntitySystem
 {
     [Dependency] private readonly ISharedAdminLogManager _adminLogger = default!;
@@ -83,7 +83,7 @@ private void OnEntityExit(EntityUid uid, SlipperyComponent component, ref EndCol
     {
         if (HasComp<SpeedModifiedByContactComponent>(args.OtherEntity))
             _speedModifier.AddModifiedEntity(args.OtherEntity);
-    } 
+    }
 
     private bool CanSlip(EntityUid uid, EntityUid toSlip)
     {
@@ -96,7 +96,7 @@ public void TrySlip(EntityUid uid, SlipperyComponent component, EntityUid other,
         if (HasComp<KnockedDownComponent>(other) && !component.SuperSlippery)
             return;
 
-        var attemptEv = new SlipAttemptEvent();
+        var attemptEv = new SlipAttemptEvent(uid);
         RaiseLocalEvent(other, attemptEv);
         if (attemptEv.SlowOverSlippery)
             _speedModifier.AddModifiedEntity(other);
@@ -148,7 +148,14 @@ public sealed class SlipAttemptEvent : EntityEventArgs, IInventoryRelayEvent
 
     public bool SlowOverSlippery;
 
+    public EntityUid? SlipCausingEntity;
+
     public SlotFlags TargetSlots { get; } = SlotFlags.FEET;
+
+    public SlipAttemptEvent(EntityUid? slipCausingEntity)
+    {
+        SlipCausingEntity = slipCausingEntity;
+    }
 }
 
 /// <summary>

Resources/Locale/en-US/actions/actions/rootable.ftl

@@ -0,0 +1,2 @@
+action-name-toggle-rootable = Rootable
+action-description-toggle-rootable = Begin or stop being rooted to the floor.

Resources/Locale/en-US/alerts/alerts.ftl

@@ -110,3 +110,6 @@ alerts-revenant-essence-desc = The power of souls. It sustains you and is used f
 
 alerts-revenant-corporeal-name = Corporeal
 alerts-revenant-corporeal-desc = You have manifested physically. People around you can see and hurt you.
+
+alerts-rooted-name = Rooted
+alerts-rooted-desc = You are attached to the ground. You can't slip, but you absorb fluids under you.