Big BIG refactor to make inventory use a model that's placed into the world, following a more sane MVC style.

tests/inventory.cpp

@@ -0,0 +1,47 @@
+#include <catch2/catch_test_macros.hpp>
+#include <fmt/core.h>
+#include <string>
+#include "inventory.hpp"
+
+using namespace fmt;
+
+TEST_CASE("base test", "[inventory]") {
+  inventory::Model inv;
+  DinkyECS::Entity test_ent = 1;
+
+  inv.add("hand_l", test_ent);
+  inv.invariant();
+
+  auto& slot = inv.get(test_ent);
+  REQUIRE(slot == "hand_l");
+
+  auto ent = inv.get(slot);
+  REQUIRE(ent == test_ent);
+
+  REQUIRE(inv.has(ent));
+  REQUIRE(inv.has(slot));
+
+  // test base remove
+  inv.remove(slot, ent);
+  REQUIRE(!inv.has(slot));
+  REQUIRE(!inv.has(ent));
+
+  // test remove just by slot
+  inv.add("hand_r", test_ent);
+  REQUIRE(inv.has("hand_r"));
+  REQUIRE(inv.has(test_ent));
+  inv.invariant();
+
+  inv.remove("hand_r");
+  REQUIRE(!inv.has("hand_r"));
+  REQUIRE(!inv.has(test_ent));
+
+  // test remove just by entity
+  inv.add("pocket_l", test_ent);
+  REQUIRE(inv.has("pocket_l"));
+  REQUIRE(inv.has(test_ent));
+  inv.invariant();
+  inv.remove(test_ent);
+  REQUIRE(!inv.has("pocket_l"));
+  REQUIRE(!inv.has(test_ent));
+}

tests/matrix.cpp

@@ -14,6 +14,7 @@ using std::string;
 using matrix::Matrix;
 
 shared_ptr<Map> make_map() {
+  // BUG? I mean, it's a shared_ptr so it should keep it around but....
   LevelManager levels;
   GameLevel level = levels.current();
   return level.map;