Almost working save sytem but the data I store is totally wrong. I need to also save the entity IDs being used and map them to the components.

tests/config.cpp

@@ -6,6 +6,7 @@
 #include "dinkyecs.hpp"
 #include "components.hpp"
 
+
 using namespace fmt;
 using std::string;
 
@@ -61,47 +62,3 @@ TEST_CASE("can go into a world", "[config]") {
   Config &cfg = world.get_the<Config>();
   REQUIRE(cfg["types"]["NUMBER"] == 1234);
 }
-
-
-#include <optional>
-#include <iostream>
-#include "tser.hpp"
-
-enum class Item : char {
-  RADAR = 'R',
-  TRAP = 'T',
-  ORE = 'O'
-};
-
-struct Pixel {
-  int x = 0;
-  int y = 0;
-
-  DEFINE_SERIALIZABLE(Pixel, x, y);
-};
-
-struct Robot {
-  Pixel point;
-  std::wstring name;
-  std::optional<Item> item;
-
-  DEFINE_SERIALIZABLE(Robot, point, name, item);
-};
-
-TEST_CASE("test using tser for serialization", "[config]") {
-  auto robot = Robot{ Pixel{3,4}, L"BIG NAME", Item::RADAR};
-  std::cout << robot << '\n';
-
-  tser::BinaryArchive archive;
-  archive.save(robot);
-  std::string_view archive_view = archive.get_buffer();
-
-  tser::BinaryArchive archive2(0);
-  archive2.initialize(archive_view);
-  auto loadedRobot = archive2.load<Robot>();
-
-  REQUIRE(loadedRobot.point.x == robot.point.x);
-  REQUIRE(loadedRobot.point.y == robot.point.y);
-  REQUIRE(loadedRobot.name == robot.name);
-  REQUIRE(loadedRobot.item == robot.item);
-}

tests/save.cpp

@@ -0,0 +1,80 @@
+#include <catch2/catch_test_macros.hpp>
+#include <fmt/core.h>
+#include <string>
+#include "dinkyecs.hpp"
+#include "components.hpp"
+#include "save.hpp"
+#include <optional>
+#include <iostream>
+#include "tser.hpp"
+
+using namespace fmt;
+using std::string;
+using namespace components;
+
+enum class Item : char {
+  RADAR = 'R',
+  TRAP = 'T',
+  ORE = 'O'
+};
+
+struct Pixel {
+  int x = 0;
+  int y = 0;
+
+  DEFINE_SERIALIZABLE(Pixel, x, y);
+};
+
+struct Robot {
+  Pixel point;
+  std::wstring name;
+  std::optional<Item> item;
+
+  DEFINE_SERIALIZABLE(Robot, point, name, item);
+};
+
+
+TEST_CASE("test using tser for serialization", "[config]") {
+  auto robot = Robot{ Pixel{3,4}, L"BIG NAME", Item::RADAR};
+  std::cout << robot << '\n';
+
+  tser::BinaryArchive archive;
+  archive.save(robot);
+  std::string_view archive_view = archive.get_buffer();
+
+  tser::BinaryArchive archive2(0);
+  archive2.initialize(archive_view);
+  auto loadedRobot = archive2.load<Robot>();
+
+  REQUIRE(loadedRobot.point.x == robot.point.x);
+  REQUIRE(loadedRobot.point.y == robot.point.y);
+  REQUIRE(loadedRobot.name == robot.name);
+  REQUIRE(loadedRobot.item == robot.item);
+}
+
+TEST_CASE("basic save a world", "[save]") {
+  DinkyECS::World world;
+
+  // configure a player as a fact of the world
+  Player player{world.entity()};
+  world.set_the<Player>(player);
+
+  world.set<Position>(player.entity, {10,10});
+  world.set<Motion>(player.entity, {0, 0});
+  world.set<Combat>(player.entity, {100, 10});
+
+  save::to_file("./savetest.world", world);
+
+  DinkyECS::World in_world;
+  save::from_file("./savetest.world", in_world);
+
+  Position &position1 = world.get<Position>(player.entity);
+  Position &position2 = in_world.get<Position>(player.entity);
+
+  // BUGGGGGGGG! This doesn't actually work, it's all fake
+  // The world uses an internal id to increment entities so
+  // by default player gets the first one, but all data after
+  // that is wrong.
+  REQUIRE(position1.location.x == position2.location.x);
+  REQUIRE(position1.location.y == position2.location.y);
+}