Refactor

apps/LoopThroughWithOpenGLCompositing/runtime/RuntimeJson.h

@@ -0,0 +1,64 @@
+#pragma once
+
+#include <map>
+#include <string>
+#include <vector>
+
+class JsonValue
+{
+public:
+	enum class Type
+	{
+		Null,
+		Boolean,
+		Number,
+		String,
+		Array,
+		Object
+	};
+
+	JsonValue();
+	explicit JsonValue(bool value);
+	explicit JsonValue(double value);
+	explicit JsonValue(const char* value);
+	explicit JsonValue(const std::string& value);
+
+	static JsonValue MakeArray();
+	static JsonValue MakeObject();
+
+	Type type() const { return mType; }
+
+	bool isNull() const { return mType == Type::Null; }
+	bool isBoolean() const { return mType == Type::Boolean; }
+	bool isNumber() const { return mType == Type::Number; }
+	bool isString() const { return mType == Type::String; }
+	bool isArray() const { return mType == Type::Array; }
+	bool isObject() const { return mType == Type::Object; }
+
+	bool asBoolean(bool fallback = false) const;
+	double asNumber(double fallback = 0.0) const;
+	const std::string& asString() const;
+	const std::vector<JsonValue>& asArray() const;
+	const std::map<std::string, JsonValue>& asObject() const;
+
+	std::vector<JsonValue>& array();
+	std::map<std::string, JsonValue>& object();
+
+	void pushBack(const JsonValue& value);
+	void set(const std::string& key, const JsonValue& value);
+
+	const JsonValue* find(const std::string& key) const;
+
+private:
+	void reset(Type type);
+
+	Type mType;
+	bool mBooleanValue;
+	double mNumberValue;
+	std::string mStringValue;
+	std::vector<JsonValue> mArrayValue;
+	std::map<std::string, JsonValue> mObjectValue;
+};
+
+bool ParseJson(const std::string& text, JsonValue& value, std::string& error);
+std::string SerializeJson(const JsonValue& value, bool pretty = false);