From 498135054a168bd839f2ee8ebb1ba245d72a8f3b Mon Sep 17 00:00:00 2001
From: Akshay Nair <phenax5@gmail.com>
Date: Fri, 21 Mar 2025 23:00:08 +0530
Subject: Lua runtime simple value conversion + spec

---
 src/LuaRuntime.cpp | 35 ++++++++++++++++++++++++++++++++---
 src/LuaRuntime.hpp |  6 ++++++
 2 files changed, 38 insertions(+), 3 deletions(-)

(limited to 'src')

diff --git a/src/LuaRuntime.cpp b/src/LuaRuntime.cpp
index e61fbf5..e9a30b1 100644
--- a/src/LuaRuntime.cpp
+++ b/src/LuaRuntime.cpp
@@ -52,13 +52,42 @@ void LuaRuntime::stopEventLoop() {
 void LuaRuntime::evaluate(QString code) {
   eventLoop->queueTask([this, code]() {
     if (luaL_dostring(state, code.toStdString().c_str())) {
-      qDebug() << "Lua Error: " << lua_tostring(state, -1);
+      auto value = lua_tostring(state, -1);
       lua_pop(state, 1);
-    } else
-      qDebug() << "done";
+
+      qDebug() << "Lua Error: " << value;
+      emit evaluationFailed(value);
+    } else {
+      auto value = getValue(-1);
+      lua_pop(state, 1);
+
+      qDebug() << "result: " << value;
+      emit evaluationCompleted(value);
+    }
   });
 }
 
+QVariant LuaRuntime::evaluateSync(QString code) {
+  auto result = luaL_dostring(state, code.toStdString().c_str());
+  return getValue(-1); // TODO: error handling
+}
+
+QVariant LuaRuntime::getValue(int idx) {
+  if (lua_isstring(state, idx))
+    return lua_tostring(state, idx);
+
+  if (lua_isnumber(state, idx))
+    return lua_tonumber(state, idx);
+
+  if (lua_isboolean(state, idx))
+    return lua_toboolean(state, idx);
+
+  if (lua_isnil(state, idx))
+    return 0; // TODO: nil representation
+
+  return lua_tostring(state, idx);
+}
+
 int LuaRuntime::lua_onUrlOpen(lua_State *state) {
   const char *url = luaL_optstring(state, 1, "");
   auto runtime = LuaRuntime::instance();
diff --git a/src/LuaRuntime.hpp b/src/LuaRuntime.hpp
index 443dec5..dd5c0ec 100644
--- a/src/LuaRuntime.hpp
+++ b/src/LuaRuntime.hpp
@@ -16,14 +16,20 @@ public:
   }
 
   void evaluate(QString code);
+  QVariant evaluateSync(QString code);
 
   void stopEventLoop();
   void startEventLoop();
 
+  QVariant getValue(int idx);
+
   DELEGATE(eventLoop, queueTask, queueTask)
 
 signals:
   void urlOpened(QString url, OpenType openType);
+  void evaluationCompleted(QVariant value);
+  void evaluationFailed(QString value);
+  // void outputProduced(QVariant value);
 
 protected:
   LuaRuntime();
-- 
cgit v1.3.1