DI

Runtime/Engine/Code/Services/Console/CVarFieldInjector.cs

@@ -0,0 +1,59 @@
+using System;
+using System.Reflection;
+using RebootKit.Engine.Foundation;
+
+namespace RebootKit.Engine.Services.Console {
+    [AttributeUsage(AttributeTargets.Field)]
+    public class CVarAttribute : Attribute {
+        public string Name { get; }
+        public CVarValue Value { get; }
+
+        public CVarAttribute(string name, float defaultValue) {
+            Name = name;
+            Value = new CVarValue(defaultValue);
+        }
+
+        public CVarAttribute(string name, double defaultValue) {
+            Name = name;
+            Value = new CVarValue(defaultValue);
+        }
+
+        public CVarAttribute(string name, string defaultValue) {
+            Name = name;
+            Value = new CVarValue(defaultValue);
+        }
+
+        public CVarAttribute(string name, int defaultValue) {
+            Name = name;
+            Value = new CVarValue(defaultValue);
+        }
+    }
+
+    public class CVarFieldInjector : DIContext.IFieldInjector {
+        private static readonly Logger Logger = new(nameof(CVarFieldInjector));
+
+        public bool Inject(FieldInfo field, object target, DIContext context) {
+            if (!Attribute.IsDefined(field, typeof(CVarAttribute))) {
+                return false;
+            }
+
+            ConsoleService console = context.Resolve<ConsoleService>();
+            if (console == null) {
+                Logger.Error($"Cannot inject field because cannot resolve `{nameof(ConsoleService)}`");
+                return false;
+            }
+
+            CVarAttribute cvarAttribute = field.GetCustomAttribute<CVarAttribute>();
+            CVar cvar = console.GetCVar(cvarAttribute.Name);
+
+            if (cvar == null) {
+                cvar = new CVar(cvarAttribute.Name, cvarAttribute.Value);
+                console.Replace(cvar);
+            }
+
+            field.SetValue(target, cvar);
+
+            return true;
+        }
+    }
+}