Random metadata component (#7894)

Co-authored-by: Moony <moonheart08@users.noreply.github.com>

Content.Server/RandomMetadata/RandomMetadataComponent.cs

@@ -0,0 +1,17 @@
+using Content.Shared.Dataset;
+using Robust.Shared.Serialization.TypeSerializers.Implementations.Custom.Prototype;
+
+namespace Content.Server.RandomMetadata;
+
+/// <summary>
+///     Randomizes the description and/or the name for an entity by pulling from a dataset prototype.
+/// </summary>
+[RegisterComponent]
+public sealed class RandomMetadataComponent : Component
+{
+    [DataField("descriptionSet", customTypeSerializer:typeof(PrototypeIdSerializer<DatasetPrototype>))]
+    public string? DescriptionSet;
+
+    [DataField("nameSet", customTypeSerializer:typeof(PrototypeIdSerializer<DatasetPrototype>))]
+    public string? NameSet;
+}

Content.Server/RandomMetadata/RandomMetadataSystem.cs

@@ -0,0 +1,36 @@
+using Content.Shared.Dataset;
+using Robust.Shared.Prototypes;
+using Robust.Shared.Random;
+
+namespace Content.Server.RandomMetadata;
+
+public sealed class RandomMetadataSystem : EntitySystem
+{
+    [Dependency] private readonly IPrototypeManager _prototype = default!;
+    [Dependency] private readonly IRobustRandom _random = default!;
+
+    public override void Initialize()
+    {
+        base.Initialize();
+
+        SubscribeLocalEvent<RandomMetadataComponent, MapInitEvent>(OnMapInit);
+    }
+
+    // This is done on map init so that map-placed entities have it randomized each time the map loads, for fun.
+    private void OnMapInit(EntityUid uid, RandomMetadataComponent component, MapInitEvent args)
+    {
+        var meta = MetaData(uid);
+
+        if (component.NameSet != null)
+        {
+            var nameProto = _prototype.Index<DatasetPrototype>(component.NameSet);
+            meta.EntityName = _random.Pick(nameProto.Values);
+        }
+
+        if (component.DescriptionSet != null)
+        {
+            var descProto = _prototype.Index<DatasetPrototype>(component.DescriptionSet);
+            meta.EntityDescription = _random.Pick(descProto.Values);
+        }
+    }
+}