Наконец-то смешное: артефакты теперь рандомные предметы на станции (#654)

* funny random artifacts

* cvar logic

* ratio logic moved to cvars

* funny update

Content.Server/_White/RandomArtifacts/RandomArtifactsSystem.cs

@@ -0,0 +1,84 @@
+using System.Linq;
+using Content.Server.Xenoarchaeology.XenoArtifacts;
+using Content.Shared._White;
+using Content.Shared.GameTicking;
+using Content.Shared.Item;
+using Robust.Shared.Configuration;
+using Robust.Shared.Random;
+
+namespace Content.Server._White.RandomArtifacts;
+
+public sealed class RandomArtifactsSystem : EntitySystem
+{
+    [Dependency] private readonly ArtifactSystem _artifactsSystem = default!;
+    [Dependency] private readonly IRobustRandom _random = default!;
+    [Dependency] private readonly IConfigurationManager _configurationManager = default!;
+
+    private float _itemToArtifactRatio; // from 0 to 100. In % percents. Default is 0.7%
+    private bool _artifactsEnabled;
+
+    public override void Initialize()
+    {
+        base.Initialize();
+
+        _configurationManager.OnValueChanged(WhiteCVars.EnableRandomArtifacts, b => OnCvarChanged(b), true);
+        _configurationManager.OnValueChanged(WhiteCVars.ItemToArtifactRatio, r => _itemToArtifactRatio = r, true);
+
+        SubscribeLocalEvent<RoundStartedEvent>(OnRoundStart);
+    }
+
+    private void OnRoundStart(RoundStartedEvent ev)
+    {
+        if (!_artifactsEnabled)
+            return;
+
+        // Removing old artifact-items and replace it with new funny stealthy items
+        foreach (var oldArtifact in EntityQuery<ArtifactComponent>())
+        {
+            QueueDel(oldArtifact.Owner);
+        }
+
+        var items = EntityQuery<ItemComponent>().ToList();
+        _random.Shuffle(items);
+
+        var selectedItems = GetPercentageOfHashSet(items, _itemToArtifactRatio);
+
+        foreach (var item in selectedItems)
+        {
+            var entity = item.Owner;
+
+            var artifactComponent = EnsureComp<ArtifactComponent>(entity);
+            _artifactsSystem.RandomizeArtifact(entity, artifactComponent);
+        }
+    }
+
+    private HashSet<ItemComponent> GetPercentageOfHashSet(List<ItemComponent> sourceList, float percentage)
+    {
+        var countToAdd = (int) Math.Round((double) sourceList.Count * percentage / 100);
+
+        return sourceList.Where(x => !Transform(x.Owner).Anchored).Take(countToAdd).ToHashSet();
+    }
+
+    private void OnCvarChanged(bool enabled)
+    {
+        if (_artifactsEnabled != enabled && !enabled)
+        {
+            var items = EntityQuery<ItemComponent, ArtifactComponent>();
+
+            foreach (var (_, artifact) in items)
+            {
+                RemComp<ArtifactComponent>(artifact.Owner);
+            }
+        }
+
+        _artifactsEnabled = enabled;
+    }
+
+}
+
+/*
+    Number of items on maps
+    DEV - 1527
+    WhiteBox - 13692
+    WonderBox - 15306
+*/