Port Arachne & Oniro from EE, with some DV changes along the way

Content.Client/_DV/Cocoon/CocoonSystem.cs

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+using System.Numerics;
+using Content.Shared._DV.Cocoon;
+using Content.Shared.Humanoid;
+using Robust.Client.GameObjects;
+using Robust.Shared.Containers;
+
+namespace Content.Client._DV.Cocoon
+{
+    public sealed class CocoonSystem : EntitySystem
+    {
+        public override void Initialize()
+        {
+            base.Initialize();
+
+            SubscribeLocalEvent<CocoonComponent, EntInsertedIntoContainerMessage>(OnCocEntInserted);
+        }
+
+        private void OnCocEntInserted(EntityUid uid, CocoonComponent component, EntInsertedIntoContainerMessage args)
+        {
+            if (!TryComp<SpriteComponent>(uid, out var cocoonSprite))
+                return;
+
+            if (TryComp<HumanoidAppearanceComponent>(args.Entity, out var humanoidAppearance)) // If humanoid, use height and width
+                cocoonSprite.Scale = new Vector2(1,1);
+            else if (!TryComp<SpriteComponent>(args.Entity, out var entSprite))
+                return;
+            else if (entSprite.BaseRSI != null) // Set scale based on sprite scale + sprite dimensions. Ideally we would somehow get a bounding box from the sprite size not including transparent pixels, but FUCK figuring that out.
+                cocoonSprite.Scale = entSprite.Scale * (entSprite.BaseRSI.Size / 32);
+            else if (entSprite.Scale != cocoonSprite.Scale) // if basersi somehow not found (?) just use scale
+                cocoonSprite.Scale = entSprite.Scale;
+        }
+    }
+}

Content.Server/_DV/Cocoon/CocoonerSystem.cs

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+using Content.Server.DoAfter;
+using Content.Server.Popups;
+using Content.Server.Speech.Components;
+using Content.Shared._DV.Cocoon;
+using Content.Shared.Administration.Logs;
+using Content.Shared.Containers.ItemSlots;
+using Content.Shared.Damage;
+using Content.Shared.Destructible;
+using Content.Shared.Eye.Blinding.Systems;
+using Content.Shared.Stunnable;
+using Robust.Shared.Containers;
+using Robust.Shared.Random;
+
+namespace Content.Server._DV.Cocoon
+{
+    public sealed class CocooningSystem : EntitySystem
+    {
+        [Dependency] private readonly PopupSystem _popupSystem = default!;
+        [Dependency] private readonly DoAfterSystem _doAfter = default!;
+        [Dependency] private readonly ItemSlotsSystem _itemSlots = default!;
+        [Dependency] private readonly BlindableSystem _blindableSystem = default!;
+        [Dependency] private readonly DamageableSystem _damageableSystem = default!;
+        [Dependency] private readonly ISharedAdminLogManager _adminLogger = default!;
+        [Dependency] private readonly SharedDestructibleSystem _destructibleSystem = default!;
+        [Dependency] private readonly IRobustRandom _robustRandom = default!;
+
+        private const string BodySlot = "body_slot";
+
+        public override void Initialize()
+        {
+            base.Initialize();
+            SubscribeLocalEvent<CocoonComponent, EntInsertedIntoContainerMessage>(OnCocEntInserted);
+            SubscribeLocalEvent<CocoonComponent, EntRemovedFromContainerMessage>(OnCocEntRemoved);
+        }
+
+        private void OnCocEntInserted(EntityUid uid, CocoonComponent component, EntInsertedIntoContainerMessage args)
+        {
+            component.Victim = args.Entity;
+
+            if (TryComp<ReplacementAccentComponent>(args.Entity, out var currentAccent))
+                component.OldAccent = currentAccent.Accent;
+
+            EnsureComp<ReplacementAccentComponent>(args.Entity).Accent = "mumble";
+            EnsureComp<StunnedComponent>(args.Entity);
+
+            _blindableSystem.UpdateIsBlind(args.Entity);
+        }
+
+        private void OnCocEntRemoved(EntityUid uid, CocoonComponent component, EntRemovedFromContainerMessage args)
+        {
+            if (TryComp<ReplacementAccentComponent>(args.Entity, out var replacement))
+                if (component.OldAccent is not null)
+                    replacement.Accent = component.OldAccent;
+                else
+                    RemComp(args.Entity, replacement);
+
+
+            RemComp<StunnedComponent>(args.Entity);
+            _blindableSystem.UpdateIsBlind(args.Entity);
+        }
+    }
+}

Content.Server/_DV/Vampire/BloodSuckerSystem.cs

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+using System.Linq;
+using Content.Shared.Verbs;
+using Content.Shared.Damage;
+using Content.Shared.DoAfter;
+using Content.Shared.Interaction;
+using Content.Shared.Inventory;
+using Content.Shared._DV.Vampire;
+using Content.Shared._DV.Cocoon;
+using Content.Server.Atmos.Components;
+using Content.Server.Body.Components;
+using Content.Server.Body.Systems;
+using Content.Shared.Chemistry.EntitySystems;
+using Content.Server.Popups;
+using Content.Server.DoAfter;
+using Content.Server.Nutrition.Components;
+using Content.Shared.Vampire;
+using Robust.Shared.Utility;
+
+namespace Content.Server.Vampire
+{
+    public sealed class BloodSuckerSystem : EntitySystem
+    {
+        [Dependency] private readonly BodySystem _bodySystem = default!;
+        [Dependency] private readonly SharedSolutionContainerSystem _solutionSystem = default!;
+        [Dependency] private readonly PopupSystem _popups = default!;
+        [Dependency] private readonly DoAfterSystem _doAfter = default!;
+        [Dependency] private readonly StomachSystem _stomachSystem = default!;
+        [Dependency] private readonly DamageableSystem _damageableSystem = default!;
+        [Dependency] private readonly InventorySystem _inventorySystem = default!;
+        [Dependency] private readonly SharedInteractionSystem _interactionSystem = default!;
+        [Dependency] private readonly BloodstreamSystem _bloodstreamSystem = default!;
+        public override void Initialize()
+        {
+            base.Initialize();
+            SubscribeLocalEvent<BloodSuckerComponent, GetVerbsEvent<InnateVerb>>(AddSuckVerb);
+            SubscribeLocalEvent<BloodSuckerComponent, BloodSuckDoAfterEvent>(OnDoAfter);
+        }
+
+        private void AddSuckVerb(EntityUid uid, BloodSuckerComponent component, GetVerbsEvent<InnateVerb> args)
+        {
+
+            var victim = args.Target;
+            var ignoreClothes = false;
+
+            if (TryComp<CocoonComponent>(args.Target, out var cocoon))
+            {
+                victim = cocoon.Victim ?? args.Target;
+                ignoreClothes = cocoon.Victim != null;
+            }
+            else if (component.WebRequired)
+                return;
+
+            if (!TryComp<BloodstreamComponent>(victim, out var bloodstream) || args.User == victim || !args.CanAccess)
+                return;
+
+            InnateVerb verb = new()
+            {
+                Act = () =>
+                {
+                    StartSuckDoAfter(uid, victim, component, bloodstream, !ignoreClothes); // start doafter
+                },
+                Text = Loc.GetString("action-name-suck-blood"),
+                Icon = new SpriteSpecifier.Texture(new("/Textures/Nyanotrasen/Icons/verbiconfangs.png")),
+                Priority = 2,
+            };
+            args.Verbs.Add(verb);
+        }
+
+
+        private void OnDoAfter(EntityUid uid, BloodSuckerComponent component, BloodSuckDoAfterEvent args)
+        {
+            if (args.Cancelled || args.Handled || args.Args.Target == null)
+                return;
+
+            args.Handled = TrySuck(uid, args.Args.Target.Value);
+        }
+
+        public void StartSuckDoAfter(EntityUid bloodsucker, EntityUid victim, BloodSuckerComponent? bloodSuckerComponent = null, BloodstreamComponent? stream = null, bool doChecks = true)
+        {
+            if (!Resolve(bloodsucker, ref bloodSuckerComponent) || !Resolve(victim, ref stream))
+                return;
+
+            if (doChecks)
+            {
+                if (!_interactionSystem.InRangeUnobstructed(bloodsucker, victim))
+                    return;
+
+                if (_inventorySystem.TryGetSlotEntity(victim, "head", out var headUid) && HasComp<PressureProtectionComponent>(headUid))
+                {
+                    _popups.PopupEntity(Loc.GetString("bloodsucker-fail-helmet", ("helmet", headUid)), victim, bloodsucker, Shared.Popups.PopupType.Medium);
+                    return;
+                }
+
+                if (_inventorySystem.TryGetSlotEntity(bloodsucker, "mask", out var maskUid) &&
+                    EntityManager.TryGetComponent<IngestionBlockerComponent>(maskUid, out var blocker) &&
+                    blocker.Enabled)
+                {
+                    _popups.PopupEntity(Loc.GetString("bloodsucker-fail-mask", ("mask", maskUid)), victim, bloodsucker, Shared.Popups.PopupType.Medium);
+                    return;
+                }
+            }
+
+            if (stream.BloodReagent != "Blood")
+                _popups.PopupEntity(Loc.GetString("bloodsucker-not-blood", ("target", victim)), victim, bloodsucker, Shared.Popups.PopupType.Medium);
+            else if (_solutionSystem.PercentFull(victim) != 0)
+                _popups.PopupEntity(Loc.GetString("bloodsucker-fail-no-blood", ("target", victim)), victim, bloodsucker, Shared.Popups.PopupType.Medium);
+            else
+                _popups.PopupEntity(Loc.GetString("bloodsucker-doafter-start", ("target", victim)), victim, bloodsucker, Shared.Popups.PopupType.Medium);
+
+            _popups.PopupEntity(Loc.GetString("bloodsucker-doafter-start-victim", ("sucker", bloodsucker)), victim, victim, Shared.Popups.PopupType.LargeCaution);
+
+            var args = new DoAfterArgs(EntityManager, bloodsucker, bloodSuckerComponent.Delay, new BloodSuckDoAfterEvent(), bloodsucker, target: victim)
+            {
+                BreakOnMove = false,
+                DistanceThreshold = 2f,
+                NeedHand = false
+            };
+
+            _doAfter.TryStartDoAfter(args);
+        }
+
+       public bool TrySuck(EntityUid bloodsucker, EntityUid victim, BloodSuckerComponent? bloodsuckerComp = null)
+
+
+{
+    var sharedBloodSuckerSystem = EntitySystem.Get<SharedBloodSuckerSystem>();
+
+    if (!Resolve(bloodsucker, ref bloodsuckerComp))
+        return false;
+    if (!TryValidateVictim(victim))
+        return false;
+
+    if (!TryGetBloodsuckerStomach(bloodsucker, out var stomach))
+        return false;
+    if (!sharedBloodSuckerSystem.TryValidateSolution(bloodsucker))
+        return false;
+
+    sharedBloodSuckerSystem.PlayBloodSuckEffects(bloodsucker, victim);
+    return CompleteBloodSuck(bloodsucker, victim, stomach, bloodsuckerComp);
+}
+
+private bool TryValidateVictim(EntityUid victim)
+{
+    if (!TryComp<BloodstreamComponent>(victim, out var bloodstream) || bloodstream.BloodSolution == null)
+        return false;
+    return _bloodstreamSystem.GetBloodLevelPercentage(victim, bloodstream) != 0.0f;
+}
+
+private bool TryGetBloodsuckerStomach(EntityUid bloodsucker, out StomachComponent stomach)
+{
+    stomach = _bodySystem.GetBodyOrganEntityComps<StomachComponent>(bloodsucker).FirstOrDefault();
+    return true;
+}
+
+
+private bool CompleteBloodSuck(EntityUid bloodsucker, EntityUid victim, StomachComponent stomach, BloodSuckerComponent bloodsuckerComp)
+{
+    if (!TryComp<BloodstreamComponent>(victim, out var bloodstream) || bloodstream.BloodSolution == null)
+        return false;
+
+    var extractedBlood = _solutionSystem.SplitSolution(bloodstream.BloodSolution.Value, bloodsuckerComp.UnitsToSuck);
+    _stomachSystem.TryTransferSolution(bloodsucker, extractedBlood, stomach);
+
+    DamageSpecifier damage = new();
+    damage.DamageDict.Add("Piercing", 1);
+    _damageableSystem.TryChangeDamage(victim, damage, true);
+
+    return true;
+}
+    }
+}

Content.Shared/_DV/Cocoon/CocoonComponent.cs

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+namespace Content.Shared._DV.Cocoon
+{
+    [RegisterComponent]
+    public sealed partial class CocoonComponent : Component
+    {
+        public string? OldAccent;
+
+        public EntityUid? Victim;
+
+        [DataField("damagePassthrough")]
+        public float DamagePassthrough = 0.5f;
+
+    }
+}

Content.Shared/_DV/Cocoon/CocoonDoAfterEvent.cs

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+using Content.Shared.DoAfter;
+using Robust.Shared.Serialization;
+
+namespace Content.Shared._DV.Cocoon
+{
+    [Serializable, NetSerializable]
+    public sealed partial class CocoonDoAfterEvent : SimpleDoAfterEvent
+    {
+    }
+
+    [Serializable, NetSerializable]
+    public sealed partial class UnCocoonDoAfterEvent : SimpleDoAfterEvent
+    {
+    }
+}

Content.Shared/_DV/Cocoon/CocoonerComponent.cs

@@ -0,0 +1,14 @@
+using Robust.Shared.GameStates;
+
+namespace Content.Shared._DV.Cocoon
+{
+    [RegisterComponent, NetworkedComponent]
+    public sealed partial class CocoonerComponent : Component
+    {
+        [DataField("cocoonDelay")]
+        public float CocoonDelay = 12f;
+
+        [DataField("cocoonKnockdownMultiplier")]
+        public float CocoonKnockdownMultiplier = 0.5f;
+    }
+}