Implemented bare-bones character system API

I need to devise a way to update the clients about changes to their
characters directly from the lua scripts. This isn't too important per se,
but the pattern will be important for the monster and trigger systems.

server/characters/character_manager_api.cpp

@@ -23,9 +23,70 @@
 
 #include "character_manager.hpp"
 
-//TODO: triggers, accessors
+static int setOnCreate(lua_State* L) {
+	//TODO: (9) empty
+}
+
+static int setOnLoad(lua_State* L) {
+	//TODO: (9) empty
+}
+
+static int setOnSave(lua_State* L) {
+	//TODO: (9) empty
+}
+
+static int setOnUnload(lua_State* L) {
+	//TODO: (9) empty
+}
+
+static int setOnDelete(lua_State* L) {
+	//TODO: (9) empty
+}
+
+static int getCharacter(lua_State* L) {
+	//integer vs name
+	CharacterManager& characterMgr = CharacterManager::GetSingleton();
+	CharacterData* characterData = nullptr;
+
+	switch(lua_type(L, 1)) {
+		case LUA_TNUMBER:
+			characterData = characterMgr.Get(lua_tointeger(L, 1));
+		break;
+		case LUA_TSTRING:
+			//access characters via their handles
+			characterData = characterMgr.Get(lua_tostring(L, 1));
+		break;
+	}
+
+	if (characterData) {
+		lua_pushlightuserdata(L, static_cast<void*>(characterData));
+	}
+	else {
+		lua_pushnil(L);
+	}
+
+	return 1;
+}
+
+static int getLoadedCount(lua_State* L) {
+	CharacterManager& characterMgr = CharacterManager::GetSingleton();
+	lua_pushinteger(L, characterMgr.GetLoadedCount());
+	return 1;
+}
+
+static int forEach(lua_State* L) {
+	//TODO: (1) find a way to update the clients when a script alters a character's data
+}
 
 static const luaL_Reg characterManagerLib[] = {
+//	{"SetOnCreate", setOnCreate},
+//	{"SetOnLoad", setOnLoad},
+//	{"SetOnSave", setOnSave},
+//	{"SetOnUnload", setOnUnload},
+//	{"SetOnDelete", setOnDelete},
+	{"GetCharacter", getCharacter},
+	{"GetLoadedCount", getLoadedCount},
+//	{"ForEach", forEach},
 	{nullptr, nullptr}
 };