move lua libs to /logic/scripting/lua/libs

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

@@ -0,0 +1,56 @@
+#include "content/Content.hpp"
+#include "items/ItemDef.hpp"
+#include "api_lua.hpp"
+
+using namespace scripting;
+
+static const ItemDef* get_item_def(lua::State* L, int idx) {
+    auto indices = content->getIndices();
+    auto id = lua::tointeger(L, idx);
+    return indices->items.get(id);
+}
+
+static int l_item_name(lua::State* L) {
+    if (auto def = get_item_def(L, 1)) {
+        return lua::pushstring(L, def->name);
+    }
+    return 0;
+}
+
+static int l_item_index(lua::State* L) {
+    auto name = lua::require_string(L, 1);
+    return lua::pushinteger(L, content->items.require(name).rt.id);
+}
+
+static int l_item_stack_size(lua::State* L) {
+    if (auto def = get_item_def(L, 1)) {
+        return lua::pushinteger(L, def->stackSize);
+    }
+    return 0;
+}
+
+static int l_item_defs_count(lua::State* L) {
+    return lua::pushinteger(L, indices->items.count());
+}
+
+static int l_item_get_icon(lua::State* L) {
+    if (auto def = get_item_def(L, 1)) {
+        switch (def->iconType) {
+            case item_icon_type::none:
+                return 0;
+            case item_icon_type::sprite:
+                return lua::pushstring(L, def->icon);
+            case item_icon_type::block:
+                return lua::pushstring(L, "block-previews:" + def->icon);
+        }
+    }
+    return 0;
+}
+
+const luaL_Reg itemlib[] = {
+    {"index", lua::wrap<l_item_index>},
+    {"name", lua::wrap<l_item_name>},
+    {"stack_size", lua::wrap<l_item_stack_size>},
+    {"defs_count", lua::wrap<l_item_defs_count>},
+    {"icon", lua::wrap<l_item_get_icon>},
+    {NULL, NULL}};