Криты (#201)

* System

* oops

Content.Server/White/Other/CritSystem/CritComponent.cs

@@ -0,0 +1,16 @@
+namespace Content.Server.White.Other.CritSystem;
+
+[RegisterComponent]
+public sealed class CritComponent : Component
+{
+    [DataField("critChance", required: true)]
+    [ViewVariables(VVAccess.ReadWrite)]
+    public int CritChance = 25;
+
+    [DataField("critMultiplier", required: true)]
+    [ViewVariables(VVAccess.ReadWrite)]
+    public float CritMultiplier = 2.5f;
+
+    [DataField("workingChance")]
+    public int? WorkingChance;
+}

Content.Server/White/Other/CritSystem/CritSystem.cs

@@ -0,0 +1,65 @@
+using Content.Server.Body.Systems;
+using Content.Server.Popups;
+using Content.Shared.Damage;
+using Content.Shared.Damage.Prototypes;
+using Content.Shared.Mobs.Components;
+using Content.Shared.Popups;
+using Content.Shared.Weapons.Melee.Events;
+using Robust.Shared.Prototypes;
+using Robust.Shared.Random;
+
+namespace Content.Server.White.Other.CritSystem;
+
+public sealed class CritSystem : EntitySystem
+{
+    [Dependency] private readonly IRobustRandom _random = default!;
+    [Dependency] private readonly IPrototypeManager _prototypeManager = default!;
+    [Dependency] private readonly PopupSystem _popup = default!;
+    [Dependency] private readonly BloodstreamSystem _bloodstream = default!;
+
+    public override void Initialize()
+    {
+        base.Initialize();
+        SubscribeLocalEvent<CritComponent, MeleeHitEvent>(HandleHit);
+    }
+
+    private void HandleHit(EntityUid uid, CritComponent component, MeleeHitEvent args)
+    {
+        foreach (var target in args.HitEntities)
+        {
+            if (!IsCriticalHit(component))
+                return;
+
+            if (!TryComp<MobStateComponent>(target, out _))
+                continue;
+
+            var damage = args.BaseDamage.Total * component.CritMultiplier;
+            var ohio = _random.Next(1, 20);
+
+            args.BonusDamage = new DamageSpecifier(_prototypeManager.Index<DamageTypePrototype>("Blunt"), damage);
+
+            _popup.PopupEntity($@"Crit! {damage}", args.User, PopupType.MediumCaution);
+
+            _bloodstream.TryModifyBloodLevel(target, -ohio);
+        }
+    }
+
+    private bool IsCriticalHit(CritComponent component)
+    {
+        var roll = _random.Next(1, 101);
+
+        var critChance = component.CritChance;
+
+        component.WorkingChance ??= component.CritChance;
+
+        var isCritical = roll <= component.WorkingChance;
+
+        if (isCritical)
+            component.WorkingChance = critChance;
+        else
+            component.WorkingChance++;
+
+        return isCritical;
+    }
+}
+