Refactored script system code and added license headers

1 files changed, 119 insertions, 0 deletions

diff --git a/src/script.cpp b/src/script.cpp
new file mode 100644
index 0000000..4630440
--- /dev/null
+++ b/src/script.cpp
@@ -0,0 +1,119 @@
+/**
+ * @file script.cpp
+ * Manages all Lua scripts.
+ *
+ * Copyright (C) 2019  Belle-Isle, Andrew <drumsetmonkey@gmail.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <script.hpp>
+
+/*********************
+*  SYSTEM SPECIFIC  *
+*********************/
+
+void ScriptSystem::configure([[maybe_unused]]entityx::EntityManager& entities,
+                             [[maybe_unused]]entityx::EventManager& events)
+{
+    this->manager = &entities;
+    this->events = &events;
+
+    events.subscribe<EntitySpawnEvent>(*this);
+
+    init();
+}
+
+void ScriptSystem::update([[maybe_unused]] entityx::EntityManager& entites,
+                          [[maybe_unused]] entityx::EventManager& events,
+                          [[maybe_unused]] entityx::TimeDelta dt)
+{
+
+}
+
+
+void ScriptSystem::receive(const EntitySpawnEvent &toSpawn)
+{
+    (void)toSpawn;
+}
+
+/*********************
+*  CLASS FUNCTIONS  *
+*********************/
+
+int ScriptSystem::init(void)
+{
+    lua.open_libraries(sol::lib::base);
+
+    scriptExport();
+    doFile();
+
+    return 0;
+}
+
+void ScriptSystem::doFile(void)
+{
+    auto result = lua.script_file("Scripts/init.lua");
+    if (!result.valid()) {
+        std::cout << "Lua error: " << std::endl;
+    }
+
+    manager->each<Position>(
+            [&](entityx::Entity, Position& p)
+            {std::cout << p.x << "," << p.y << std::endl;});
+}
+
+/********************
+*  SCRIPT PARSING  *
+********************/
+
+void ScriptSystem::scriptExport()
+{
+
+    std::function<sol::table(sol::table)> func = 
+        [this](sol::table t){ return spawn(t);};
+
+    lua.new_usertype<Position>("Position",
+            sol::constructors<Position(float x, float y), Position()>(),
+            "x", &Position::x,
+            "y", &Position::y);
+
+    auto gamespace = lua["game"].get_or_create<sol::table>();
+    gamespace.set_function("spawn", func);
+}
+
+sol::table ScriptSystem::spawn(sol::object param)
+{
+    sol::table toRet = lua.create_table_with();
+    
+    if (param.get_type() == sol::type::table) {
+        sol::table tab = param;
+
+        entityx::Entity e = manager->create();
+
+        if (tab["Position"] != nullptr) {
+            toRet["Position"] = 
+                e.assign<Position>(Position().FromLua(tab["Position"])).get();
+        }
+
+        if (tab["init"] != nullptr) {
+            toRet["init"] = tab["init"];
+        }
+
+    } else {
+        std::cerr << "Parameter to spawn() must be a table!" << std::endl;
+    }
+
+    return toRet;
+}