Add real regex support to lua

processor/processor.go

@@ -247,6 +247,7 @@ modified = false
 	initLuaHelpersLogger.Debug("Setting up Lua print function to Go")
 	L.SetGlobal("print", L.NewFunction(printToGo))
 	L.SetGlobal("fetch", L.NewFunction(fetch))
+	L.SetGlobal("re", L.NewFunction(evalRegex))
 	initLuaHelpersLogger.Debug("Lua print and fetch functions bound to Go")
 	return nil
 }
@@ -481,3 +482,23 @@ func fetch(L *lua.LState) int {
 	fetchLogger.Debug("Pushed response table to Lua stack")
 	return 1
 }
+
+func evalRegex(L *lua.LState) int {
+	evalRegexLogger := processorLogger.WithPrefix("evalRegex")
+	evalRegexLogger.Debug("Lua evalRegex function called")
+	pattern := L.ToString(1)
+	input := L.ToString(2)
+
+	re := regexp.MustCompile(pattern)
+	matches := re.FindStringSubmatch(input)
+
+	matchesTable := L.NewTable()
+	for i, match := range matches {
+		matchesTable.RawSetString(fmt.Sprintf("%d", i), lua.LString(match))
+	}
+
+	L.Push(matchesTable)
+	evalRegexLogger.Debug("Pushed matches table to Lua stack")
+
+	return 0
+}