From c57ae8c42c1f2f2ed576719c00cff5cf613fe650 Mon Sep 17 00:00:00 2001
From: Steph Enders <smenders@gmail.com>
Date: Thu, 16 Jun 2022 16:14:18 -0400
Subject: Added onUpdate logic to move the enemies etc

Created some algorithm logic for enemy movement
Allowed for default overrides
---
 src/main.cpp | 58 +++++++++++++++++++++++++++++++++++++++++++---------------
 1 file changed, 43 insertions(+), 15 deletions(-)

(limited to 'src/main.cpp')

diff --git a/src/main.cpp b/src/main.cpp
index 6f649cd..eef9777 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -5,15 +5,18 @@
 #include <iostream>
 #include <lua.hpp>
 
-const char* DEFAULT_PROC = "include/default_proc.lua";
+const char *DEFAULT_PROC = "include/defaults.lua";
 std::shared_ptr<Level> lvl;
 
-bool
-call_onkeypress(lua_State* L, char pressedKey);
+struct LState {
+  lua_State *onkeypress;
+  lua_State *onupdate;
+} typedef LState;
 
-int
-main(int argc, char** argv)
-{
+bool call_onkeypress(lua_State *L, char pressedKey);
+bool call_onupdate(lua_State *L);
+
+int main(int argc, char **argv) {
 
   if (argc <= 1) {
     return -1;
@@ -21,18 +24,18 @@ main(int argc, char** argv)
 
   std::string lvl_pfx = argv[1];
 
-  std::filesystem::path mapFile{ lvl_pfx + "/dng.map" };
-  std::filesystem::path luaFile{ lvl_pfx + "/proc.lua" };
+  std::filesystem::path mapFile{lvl_pfx + "/dng.map"};
+  std::filesystem::path luaFile{lvl_pfx + "/proc.lua"};
 
   lvl = std::make_shared<Level>();
 
   lvl->loadLevelFromFile(mapFile.c_str());
 
-  lua_State* L_lvl = luaL_newstate();
+  lua_State *L_lvl = luaL_newstate();
   luaL_openlibs(L_lvl);
   init_c_api(L_lvl);
 
-  lua_State* L_default = luaL_newstate();
+  lua_State *L_default = luaL_newstate();
   luaL_openlibs(L_default);
   init_c_api(L_default);
 
@@ -43,8 +46,22 @@ main(int argc, char** argv)
     return EXIT_FAILURE;
   }
 
+  // Initialize to default
+  LState l_state = {.onkeypress = L_default, .onupdate = L_default};
+
   if (std::filesystem::exists(luaFile) &&
-      luaL_dofile(L_lvl, luaFile.c_str()) != LUA_OK) {
+      luaL_dofile(L_lvl, luaFile.c_str()) == LUA_OK) {
+
+    // overwrite defaults
+    lua_getglobal(L_lvl, "onKeyPress");
+    if (lua_isfunction(L_lvl, -1)) {
+      l_state.onkeypress = L_lvl;
+    }
+    lua_getglobal(L_lvl, "onUpdate");
+    if (lua_isfunction(L_lvl, -1)) {
+      l_state.onupdate = L_lvl;
+    }
+  } else if (std::filesystem::exists(luaFile)) {
     std::cout << "[C] No Good" << std::endl;
     luaL_error(L_lvl, "Error: %s\n", lua_tostring(L_lvl, -1));
     return EXIT_FAILURE;
@@ -57,7 +74,10 @@ main(int argc, char** argv)
   do {
     lvl->print();
     std::cin >> in;
-    if (!call_onkeypress(L_default, in)) {
+    if (!call_onkeypress(l_state.onkeypress, in)) {
+      quit = true;
+    }
+    if (!call_onupdate(l_state.onupdate)) {
       quit = true;
     }
     if (!quit && in == 'q') {
@@ -70,9 +90,7 @@ main(int argc, char** argv)
   return EXIT_SUCCESS;
 }
 
-bool
-call_onkeypress(lua_State* L, char pressedKey)
-{
+bool call_onkeypress(lua_State *L, char pressedKey) {
   lua_getglobal(L, "onKeyPress");
   if (!lua_isfunction(L, -1)) {
     std::cout << "[C] Error onKeyPress not function | not found" << std::endl;
@@ -81,4 +99,14 @@ call_onkeypress(lua_State* L, char pressedKey)
   lua_pushinteger(L, pressedKey);
   lua_pcall(L, 1, 1, 0);
   return true;
+}
+
+bool call_onupdate(lua_State *L) {
+  lua_getglobal(L, "onUpdate");
+  if (!lua_isfunction(L, -1)) {
+    std::cout << "[C] Error onUpdate not function | not found" << std::endl;
+    return false;
+  }
+  lua_pcall(L, 0, 1, 0);
+  return true;
 }
\ No newline at end of file
-- 
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