add 'on_block_removed' event

src/frontend/screens/LevelScreen.cpp

@@ -109,6 +109,7 @@ LevelScreen::~LevelScreen() {
     scripting::on_frontend_close();
     // unblock all bindings
     input.getBindings().enableAll();
+    playerController->getPlayer()->chunks->saveAndClear();
     controller->onWorldQuit();
     engine.getPaths().setCurrentWorldFolder("");
 }
@@ -278,5 +279,6 @@ void LevelScreen::onEngineShutdown() {
     if (hud->isInventoryOpen()) {
         hud->closeInventory();
     }
+    controller->processBeforeQuit();
     controller->saveWorld();
 }

src/logic/EngineController.cpp

@@ -366,7 +366,9 @@ void EngineController::reconfigPacks(
                 );
             }
         } else {
-            auto world = controller->getLevel()->getWorld();
+            auto level = controller->getLevel();
+            auto world = level->getWorld();
+            controller->processBeforeQuit();
             controller->saveWorld();
 
             auto names = PacksManager::getNames(world->getPacks());

src/logic/LevelController.cpp

@@ -27,7 +27,8 @@ LevelController::LevelController(
     : settings(engine->getSettings()),
       level(std::move(levelPtr)),
       chunks(std::make_unique<ChunksController>(*level)),
-      playerTickClock(20, 3) {
+      playerTickClock(20, 3),
+      localPlayer(clientPlayer) {
     
     level->events->listen(LevelEventType::CHUNK_PRESENT, [](auto, Chunk* chunk) {
         scripting::on_chunk_present(*chunk, chunk->flags.loaded);
@@ -121,6 +122,13 @@ void LevelController::update(float delta, bool pause) {
     level->entities->clean();
 }
 
+void LevelController::processBeforeQuit() {
+    if (localPlayer) {
+        localPlayer->chunks->saveAndClear();
+    }
+    scripting::process_before_quit();
+}
+
 void LevelController::saveWorld() {
     auto world = level->getWorld();
     if (world->isNameless()) {

src/logic/LevelController.hpp

@@ -20,6 +20,7 @@ class LevelController {
     std::unique_ptr<ChunksController> chunks;
 
     util::Clock playerTickClock;
+    Player* localPlayer;
 public:
     LevelController(Engine* engine, std::unique_ptr<Level> level, Player* clientPlayer);
 
@@ -27,6 +28,7 @@ public:
     /// @param pause is world and player simulation paused
     void update(float delta, bool pause);
 
+    void processBeforeQuit();
     void saveWorld();
 
     void onWorldQuit();

src/logic/scripting/lua/libs/libcore.cpp

@@ -119,6 +119,7 @@ static int l_close_world(lua::State* L) {
     if (controller == nullptr) {
         throw std::runtime_error("no world open");
     }
+    controller->processBeforeQuit();
     bool save_world = lua::toboolean(L, 1);
     if (save_world) {
         controller->saveWorld();

src/logic/scripting/scripting.cpp

@@ -341,6 +341,13 @@ void scripting::on_world_save() {
     }
 }
 
+void scripting::process_before_quit() {
+    auto L = lua::get_main_state();
+    if (lua::getglobal(L, "__vc_process_before_quit")) {
+        lua::call_nothrow(L, 0, 0);
+    }
+}
+
 void scripting::on_world_quit() {
     auto L = lua::get_main_state();
     for (auto& pack : content_control->getAllContentPacks()) {
@@ -677,6 +684,8 @@ void scripting::load_content_script(
         register_event(env, "on_blocks_tick", prefix + ".blockstick");
     funcsset.onblockpresent =
         register_event(env, "on_block_present", prefix + ".blockpresent");
+    funcsset.onblockremoved =
+        register_event(env, "on_block_removed", prefix + ".blockremoved");
 }
 
 void scripting::load_content_script(

src/logic/scripting/scripting.hpp

@@ -81,6 +81,7 @@ namespace scripting {
     void on_world_load(LevelController* controller);
     void on_world_tick(int tps);
     void on_world_save();
+    void process_before_quit();
     void on_world_quit();
     void cleanup(const std::vector<std::string>& nonReset);
     void on_blocks_tick(const Block& block, int tps);

src/voxels/Block.hpp

@@ -51,6 +51,7 @@ struct BlockFuncsSet {
     bool onblocktick : 1;
     bool onblockstick : 1;
     bool onblockpresent : 1;
+    bool onblockremoved : 1;
 };
 
 struct CoordSystem {

src/voxels/blocks_agent.cpp

@@ -19,6 +19,7 @@ static uint8_t get_events_bits(const Block& def) {
     auto funcsset = def.rt.funcsset;
     bits |= BlockRegisterEvent::UPDATING_BIT * funcsset.onblocktick;
     bits |= BlockRegisterEvent::PRESENT_EVENT_BIT * funcsset.onblockpresent;
+    bits |= BlockRegisterEvent::REMOVED_EVENT_BIT * funcsset.onblockremoved;
     return bits;
 }
 

src/voxels/blocks_agent.hpp

@@ -28,6 +28,7 @@ struct BlockRegisterEvent {
     static inline constexpr uint8_t REGISTER_BIT = 0x1;
     static inline constexpr uint8_t UPDATING_BIT = 0x2;
     static inline constexpr uint8_t PRESENT_EVENT_BIT = 0x4;
+    static inline constexpr uint8_t REMOVED_EVENT_BIT = 0x8;
     uint8_t bits;
     blockid_t id;
     glm::ivec3 coord;