Data-oriented Construction System (#2152)

- Powerful
- Data-oriented
- Approved by PJB
- Powered by node graphs and AI pathfinding
- Coded by the same nerd who brought you atmos

Co-authored-by: Exp <theexp111@gmail.com>

Content.Server/Construction/Completions/PopupUser.cs

@@ -0,0 +1,33 @@
+#nullable enable
+using System.Threading.Tasks;
+using Content.Shared.Construction;
+using Content.Shared.Interfaces;
+using JetBrains.Annotations;
+using Robust.Shared.Interfaces.GameObjects;
+using Robust.Shared.Serialization;
+
+namespace Content.Server.Construction.Completions
+{
+    [UsedImplicitly]
+    public class PopupUser : IGraphAction
+    {
+        public void ExposeData(ObjectSerializer serializer)
+        {
+            serializer.DataField(this, x => x.Text, "text", string.Empty);
+            serializer.DataField(this, x => x.Cursor, "cursor", false);
+        }
+
+        public bool Cursor { get; private set; } = false;
+        public string Text { get; private set; } = string.Empty;
+
+        public async Task PerformAction(IEntity entity, IEntity? user)
+        {
+            if (user == null) return;
+
+            if(Cursor)
+                user.PopupMessageCursor(Text);
+            else
+                entity.PopupMessage(user, Text);
+        }
+    }
+}