action refactor proper ecs edition (#27422)

Content.Shared/Actions/Events/ActionValidateEvent.cs

@@ -0,0 +1,32 @@
+namespace Content.Shared.Actions.Events;
+
+/// <summary>
+/// Raised on an action entity before being used to:
+/// 1. Make sure client is sending the correct kind of target (if any)
+/// 2. Do any validation on the target, if needed
+/// 3. Give the action system an event to raise on the performer, to actually do the action.
+/// </summary>
+[ByRefEvent]
+public struct ActionValidateEvent
+{
+    /// <summary>
+    /// Request event the client sent.
+    /// </summary>
+    public RequestPerformActionEvent Input;
+
+    /// <summary>
+    /// User trying to use the action.
+    /// </summary>
+    public EntityUid User;
+
+    /// <summary>
+    /// Entity providing this action to the user, used for logging.
+    /// </summary>
+    public EntityUid Provider;
+
+    /// <summary>
+    /// If set to true, the client sent invalid event data and this should be logged as an error.
+    /// For functioning input that happens to not be allowed this should not be set, for example a range check.
+    /// </summary>
+    public bool Invalid;
+}