Add helper to get int from variable

src/utils/math-helpers.cpp

@@ -44,4 +44,14 @@ std::optional<double> GetDouble(const std::string &str)
 	return {};
 }
 
+std::optional<int> GetInt(const std::string &str)
+{
+	char *end = nullptr;
+	int value = std::strtol(str.c_str(), &end, 10);
+	if (end != str.c_str() && *end == '\0') {
+		return value;
+	}
+	return {};
+}
+
 } // namespace advss

src/utils/math-helpers.hpp

@@ -9,5 +9,6 @@ std::variant<double, std::string>
 EvalMathExpression(const std::string &expression);
 bool IsValidNumber(const std::string &);
 std::optional<double> GetDouble(const std::string &);
+std::optional<int> GetInt(const std::string &);
 
 } // namespace advss

src/utils/variable.cpp

@@ -53,6 +53,11 @@ std::optional<double> Variable::DoubleValue() const
 	return GetDouble(_value);
 }
 
+std::optional<int> Variable::IntValue() const
+{
+	return GetInt(_value);
+}
+
 void Variable::SetValue(const std::string &val)
 {
 	_value = val;

src/utils/variable.hpp

@@ -20,6 +20,7 @@ public:
 	void Save(obs_data_t *obj) const;
 	std::string Value() const { return _value; }
 	std::optional<double> DoubleValue() const;
+	std::optional<int> IntValue() const;
 	void SetValue(const std::string &val);
 	void SetValue(double);
 	static std::shared_ptr<Item> Create()