JSONReader.h

#pragma once
 
#include <Foundation/Basics.h>
#include <Foundation/IO/JSONParser.h>
#include <Foundation/Types/Variant.h>
 
class PL_FOUNDATION_DLL plJSONReader : public plJSONParser
{
public:
  enum class ElementType : plInt8
  {
    None,       
    Dictionary, 
    Array,      
  };
 
  plJSONReader();
 
  plResult Parse(plStreamReader& ref_input, plUInt32 uiFirstLineOffset = 0);
 
  const plVariantDictionary& GetTopLevelObject() const { return m_Stack.PeekBack().m_Dictionary; }
 
  const plVariantArray& GetTopLevelArray() const { return m_Stack.PeekBack().m_Array; }
 
  ElementType GetTopLevelElementType() const { return m_Stack.PeekBack().m_Mode; }
 
private:
  virtual bool OnVariable(plStringView sVarName) override;
 
  virtual void OnReadValue(plStringView sValue) override;
 
  virtual void OnReadValue(double fValue) override;
 
  virtual void OnReadValue(bool bValue) override;
 
  virtual void OnReadValueNULL() override;
 
  virtual void OnBeginObject() override;
 
  virtual void OnEndObject() override;
 
  virtual void OnBeginArray() override;
 
  virtual void OnEndArray() override;
 
  virtual void OnParsingError(plStringView sMessage, bool bFatal, plUInt32 uiLine, plUInt32 uiColumn) override;
 
protected:
  struct Element
  {
    plString m_sName;
    ElementType m_Mode = ElementType::None;
    plVariantArray m_Array;
    plVariantDictionary m_Dictionary;
  };
 
  plHybridArray<Element, 32> m_Stack;
 
  bool m_bParsingError = false;
  plString m_sLastName;
};