LRU-LIFO: Add Lufos, add LUFOs to Director

This represents our realization that we can represent qualia
inputs using LRU LIFOs

smocore/include/director/director.h

@@ -3,6 +3,7 @@
 
 #include <config.h>
 #include <goal.h>
+#include <lruLifo.h>
 
 namespace smo {
 namespace director {
@@ -12,7 +13,28 @@ public:
     Director() = default;
     ~Director() = default;
 
-    Goal purpose;
+	/** 		EXPLANATION:
+	 * We allow SMO to prioritize negtrins over injected goals, so that it can
+	 * prioritize pain mitigation. We may decide to change this in the future.
+	 *
+	 * NB: Prioritizing negtrins is not the same as priortizing
+	 * self-preservation...at least we don't think so at the moment of writing.
+	 * It is definitely not desirable for SMO to prioritize self-preservation
+	 * over our injected goals.
+	 */
+	LruLifo negtrins;
+	/** 		EXPLANATION:
+	 * These are goals injected by Mrntt. This is how Mrntt is able to inject
+	 * goals into the director.
+	 */
+	LruLifo injectedGoals;
+	/** 		EXPLANATION:
+	 * These are goals chosen by the running mind. Director will always
+	 * prioritize injected goals over chosen goals.
+	 */
+	LruLifo chosenGoals;
+	LruLifo postrins;
+	LruLifo nontrins;
 };
 
 } // namespace director

smocore/include/lruLifo.h

@@ -0,0 +1,32 @@
+#ifndef _LRU_LIFO_H
+#define _LRU_LIFO_H
+
+#include <vector>
+#include <cstdint>
+#include <mentalEntity.h>
+
+namespace smo {
+
+/**	EXPLANATION:
+ * LruLifo is a Last In First Out (LIFO) buffer with Least Recently Used (LRU)
+ * eviction. It is used to store a limited number of items, and the oldest item
+ * is removed when the buffer is full.
+ *
+ * This is used to store the most recent qualia to be processed by drctr.
+ * Drctr pops objects off the LruLifos in its main loop.
+ *
+ * Naturally since a mind is operating in dynamic world, we may very well be
+ * flooded with with too many qualia to process. Some qualia may just have to be
+ * dropped. So we may very well literally forget those qualia that get dropped
+ * from the LruLifos. (Because LruLifos have a fixed size.)
+ */
+
+class LruLifo {
+public:
+    LruLifo() = default;
+    ~LruLifo() = default;
+};
+
+} // namespace smo
+
+#endif