Create the systems.cpp for the boss fight mini game.

boss/system.cpp

@@ -0,0 +1,29 @@
+#include "boss/system.hpp"
+#include <fmt/core.h>
+#include "components.hpp"
+#include "game_level.hpp"
+
+namespace boss {
+  using namespace components;
+
+  void System::load_config() {
+    fmt::println("load it");
+  }
+
+  shared_ptr<boss::UI> System::create_bossfight() {
+    auto& level = GameDB::current_level();
+    auto prev_world = GameDB::current_world();
+    dbc::check(prev_world != nullptr, "Starter world for boss fights can't be null.");
+    auto world = GameDB::clone_load_world(prev_world);
+    auto& config = prev_world->get_the<GameConfig>();
+
+    auto boss_names = config.bosses.keys();
+    auto& level_name = boss_names[level.index % boss_names.size()];
+    auto& boss_data = config.bosses[level_name];
+
+    auto boss_id = world->entity();
+    components::configure_entity(*world, boss_id, boss_data["components"]);
+
+    return make_shared<boss::UI>(world, boss_id);
+  }
+}

boss/system.hpp

@@ -0,0 +1,11 @@
+#pragma once
+#include "dinkyecs.hpp"
+#include <memory>
+#include "boss/ui.hpp"
+
+namespace boss {
+  namespace System {
+    void load_config();
+    std::shared_ptr<boss::UI> create_bossfight();
+  }
+}

boss/ui.cpp

@@ -1,5 +1,6 @@
 #include "boss/ui.hpp"
 #include "constants.hpp"
+#include "components.hpp"
 
 namespace boss {
   using namespace guecs;
@@ -7,11 +8,16 @@ namespace boss {
   UI::UI(shared_ptr<World> world, Entity boss_id) :
     $world(world),
     $boss_id(boss_id),
-    $combat_ui(true),
-    $boss_sprite(textures::get_sprite("test_boss")),
-    $player_sprite(textures::get_sprite("test_player")),
-    $floor_sprite(textures::get_sprite("test_floor"))
+    $combat_ui(true)
   {
+    auto& sprite = world->get<components::Sprite>($boss_id);
+    $boss_sprite = textures::get_sprite(sprite.name);
+
+    auto& boss_conf = world->get<components::BossFight>($boss_id);
+    // floor is std::optional
+    $floor_sprite = textures::get_sprite(*boss_conf.floor);
+
+    $player_sprite = textures::get_sprite("test_player");
   }
 
   void UI::init() {