Liquid anomaly (#20626)

Co-authored-by: Kara <lunarautomaton6@gmail.com>

Content.Server/Anomaly/Effects/InjectionAnomalySystem.cs

@@ -0,0 +1,67 @@
+using System.Linq;
+using Content.Server.Anomaly.Components;
+using Content.Server.Chemistry.Components.SolutionManager;
+using Content.Server.Chemistry.EntitySystems;
+using Content.Shared.Anomaly.Components;
+
+namespace Content.Server.Anomaly.Effects;
+/// <summary>
+/// This component allows the anomaly to inject liquid from the SolutionContainer
+/// into the surrounding entities with the InjectionSolution component
+/// </summary>
+///
+
+/// <see cref="InjectionAnomalyComponent"/>
+public sealed class InjectionAnomalySystem : EntitySystem
+{
+    [Dependency] private readonly EntityLookupSystem _lookup = default!;
+    [Dependency] private readonly SolutionContainerSystem _solutionContainer = default!;
+
+    private EntityQuery<InjectableSolutionComponent> _injectableQuery;
+
+    public override void Initialize()
+    {
+        SubscribeLocalEvent<InjectionAnomalyComponent, AnomalyPulseEvent>(OnPulse);
+        SubscribeLocalEvent<InjectionAnomalyComponent, AnomalySupercriticalEvent>(OnSupercritical, before: new[] { typeof(SolutionContainerSystem) });
+
+        _injectableQuery = GetEntityQuery<InjectableSolutionComponent>();
+    }
+
+    private void OnPulse(EntityUid uid, InjectionAnomalyComponent component, ref AnomalyPulseEvent args)
+    {
+        PulseScalableEffect(uid, component, component.InjectRadius, component.MaxSolutionInjection * args.Severity);
+    }
+
+    private void OnSupercritical(EntityUid uid, InjectionAnomalyComponent component, ref AnomalySupercriticalEvent args)
+    {
+        PulseScalableEffect(uid, component, component.SuperCriticalInjectRadius, component.SuperCriticalSolutionInjection);
+    }
+
+    private void PulseScalableEffect(EntityUid uid, InjectionAnomalyComponent component, float injectRadius, float maxInject)
+    {
+        if (!_solutionContainer.TryGetSolution(uid, component.Solution, out var sol))
+            return;
+        //We get all the entity in the radius into which the reagent will be injected.
+        var xformQuery = GetEntityQuery<TransformComponent>();
+        var xform = xformQuery.GetComponent(uid);
+        var allEnts = _lookup.GetComponentsInRange<InjectableSolutionComponent>(xform.MapPosition, injectRadius)
+            .Select(x => x.Owner).ToList();
+
+        //for each matching entity found
+        foreach (var ent in allEnts)
+        {
+            if (!_solutionContainer.TryGetInjectableSolution(ent, out var injectable))
+                continue;
+
+            if (_injectableQuery.TryGetComponent(ent, out var injEnt))
+            {
+                var buffer = sol;
+                _solutionContainer.TryTransferSolution(ent, injectable, buffer, maxInject);
+                //Spawn Effect
+                var uidXform = Transform(ent);
+                Spawn(component.VisualEffectPrototype, uidXform.Coordinates);
+            }
+        }
+    }
+
+}