JsonParserByLeo/Src/JsonDomSerializer.mqh

//+------------------------------------------------------------------+
//|                                            JsonDomSerializer.mqh |
//|                                  Copyright 2026, MetaQuotes Ltd. |
//|                                             https://www.mql5.com |
//+------------------------------------------------------------------+
#property copyright "Copyright 2026, MetaQuotes Ltd."
#property link      "https://www.mql5.com"
#property strict

#ifndef JSONPARSERBYLEO_SRC_JSONDOMSERIALIZER_MQH
#define JSONPARSERBYLEO_SRC_JSONDOMSERIALIZER_MQH

//+------------------------------------------------------------------+
//|                                                                  |
//+------------------------------------------------------------------+
#include <TSN\\BSFL\\Node.mqh>
#include "JsonDefines.mqh"
#include "JsonEscape.mqh"

//+------------------------------------------------------------------+
//|                                                                  |
//+------------------------------------------------------------------+
namespace TSN
{
//+------------------------------------------------------------------+
//|                                                                  |
//+------------------------------------------------------------------+
class CJsonDomSerializer
 {
public:
  //---
  uchar              m_buf[];
  int                m_buf_s;
  int                m_buf_r;

private:
  //---
  uchar              m_dbl_reserve;
  uchar              m_digits;

  //-- stacks
                     CHashMapFastIterator(string, CDomNodeBase*) m_stack_it_obj[JSONPARSERBYLEO_MAX_STACK];
  int                m_stack_count[JSONPARSERBYLEO_MAX_STACK];
  int                m_stack_ix[JSONPARSERBYLEO_MAX_STACK];
  int                m_stack_k[JSONPARSERBYLEO_MAX_STACK];
  int                m_stack_it_obj_curr;

public:
                     CJsonDomSerializer(void);
                    ~CJsonDomSerializer(void) {}

  //---
  void                Digitos(uchar v);
  __forceinline uchar Digitos() const { return m_digits; }

  //---
  bool               Serialize(CDomNodeBase* v);
 };

//+------------------------------------------------------------------+
//|                                                                  |
//+------------------------------------------------------------------+
CJsonDomSerializer::CJsonDomSerializer()
  : m_buf_s(0), m_buf_r(4096), m_dbl_reserve(MQLARTICLES_CONV_MAXDIG_DBL(8)), m_digits(8), m_stack_it_obj_curr(0)
 {
  ArrayResize(m_buf, m_buf_r, m_buf_r);
 }

//+------------------------------------------------------------------+
//|                                                                  |
//+------------------------------------------------------------------+
#define DOMMANAGERCHEKCAP_JSON(N)         \
  if(m_buf_s + (N) >= m_buf_r)            \
  {                                       \
   m_buf_r = (m_buf_s + (N)) << 1;        \
   ArrayResize(m_buf, m_buf_r, m_buf_r);  \
  }


//+------------------------------------------------------------------+
//|                                                                  |
//+------------------------------------------------------------------+
void CJsonDomSerializer::Digitos(uchar v)
 {
  m_digits = v;
  m_dbl_reserve = MQLARTICLES_CONV_MAXDIG_DBL(v);
 }

//+------------------------------------------------------------------+
//|                                                                  |
//+------------------------------------------------------------------+
bool CJsonDomSerializer::Serialize(CDomNodeBase* v)
 {
//---
  uchar next = v.m_type;
  m_stack_it_obj_curr = -1;
  m_buf_s = 0;

//---
  while(true)
   {
    switch(next)
     {
      case 0:
        break; // Sale noma..
      case TSN_SBL_BASE_TYPE_OBJ:
       {
        //---
        m_stack_it_obj_curr++;
        m_stack_it_obj[m_stack_it_obj_curr] = v.HashMap().BeginIteration();
        m_stack_ix[m_stack_it_obj_curr] = -1; // no usar
        m_stack_k[m_stack_it_obj_curr] = 0;

        //---
        DOMMANAGERCHEKCAP_JSON(1)
        m_buf[m_buf_s++] = '{';
        break;
       }
      case TSN_SBL_BASE_TYPE_ARR:
       {
        //---
        m_stack_it_obj_curr++;
        m_stack_ix[m_stack_it_obj_curr] = v.m_v.ix;
        m_stack_count[m_stack_it_obj_curr] = v.Size();
        m_stack_k[m_stack_it_obj_curr] = 0;

        //---
        DOMMANAGERCHEKCAP_JSON(1)
        m_buf[m_buf_s++] = '[';
        break;
       }
      case TSN_SBL_BASE_TYPE_UINT:
       {
        //---
        DOMMANAGERCHEKCAP_JSON(MQLARTICLES_CONV_MAXDIG_UL)
        STRCONV_VALTOBUFFER_USIGNED(v.m_v.uv, m_buf, m_buf_s)

        //---
        break;
       }
      case TSN_SBL_BASE_TYPE_INT:
       {
        //---
        DOMMANAGERCHEKCAP_JSON(MQLARTICLES_CONV_MAXDIG_L)
        STRCONV_VALTOBUFFER_SIGNED(v.m_v.iv, m_buf, m_buf_s, ulong, uvalue)

        //---
        break;
       }
      case TSN_SBL_BASE_TYPE_FLT:
       {
        //---
        DOMMANAGERCHEKCAP_JSON(m_dbl_reserve)

        //---
        if(!MathIsValidNumber(v.m_v.dv))
         {
          m_buf[m_buf_s++] = 'n';
          m_buf[m_buf_s++] = 'u';
          m_buf[m_buf_s++] = 'l';
          m_buf[m_buf_s++] = 'l';
          break; // Salimos..
         }

        //---
        CValueToBuffer::ToValue(v.m_v.dv, m_buf, m_buf_s, m_digits);

        //---
        break;
       }
      case TSN_SBL_BASE_TYPE_BOL:
       {
        DOMMANAGERCHEKCAP_JSON(7)
        if(v.m_v.bv)
         {
          m_buf[m_buf_s++] = 't';
          m_buf[m_buf_s++] = 'r';
          m_buf[m_buf_s++] = 'u';
          m_buf[m_buf_s++] = 'e';
         }
        else
         {
          m_buf[m_buf_s++] = 'f';
          m_buf[m_buf_s++] = 'a';
          m_buf[m_buf_s++] = 'l';
          m_buf[m_buf_s++] = 's';
          m_buf[m_buf_s++] = 'e';
         }
        break;
       }
      case TSN_SBL_BASE_TYPE_STR:
       {
        //---
        const int i = v.m_v.ix;
        const int l = StringLen(v.m_ctx.m_string_stack[i]);
        const int r = JSONESCAPE_CR_ENCODE(l) + 2;
        DOMMANAGERCHEKCAP_JSON(r)

        //---
        m_buf[m_buf_s++] = '"';
        CJsonEscape::Encode(v.m_ctx.m_string_stack[i], l, m_buf, m_buf_s);
        m_buf[m_buf_s++] = '"';

        //---
        break;
       }
      case TSN_SBL_BASE_DOM_NULL:
       {
        DOMMANAGERCHEKCAP_JSON(6)
        m_buf[m_buf_s++] = 'n';
        m_buf[m_buf_s++] = 'u';
        m_buf[m_buf_s++] = 'l';
        m_buf[m_buf_s++] = 'l';
        break;
       }
      default:
        return false;
     }

    //----
    if(m_stack_ix[m_stack_it_obj_curr] == -1)
     {
      if(m_stack_it_obj[m_stack_it_obj_curr].IsValid())
       {
        if(m_stack_k[m_stack_it_obj_curr] > 0)
          m_buf[m_buf_s++] = ',';

        //--- Key
        static string out;
        m_stack_it_obj[m_stack_it_obj_curr].Key(out);

        //---
        const int l = StringLen(out);
        const int r = JSONESCAPE_CR_ENCODE(l) + 3;
        DOMMANAGERCHEKCAP_JSON(r)

        //--- Escape
        m_buf[m_buf_s++] = '"';
        CJsonEscape::Encode(out, l, m_buf, m_buf_s);
        m_buf[m_buf_s++] = '"';
        m_buf[m_buf_s++] = ':';

        //--- Value
        v = m_stack_it_obj[m_stack_it_obj_curr].Val(); // assing..
        m_stack_it_obj[m_stack_it_obj_curr].Next();
        next = v.m_type;

        //---
        m_stack_k[m_stack_it_obj_curr]++;
        continue;
       }

      //---
      // Ya no..
      DOMMANAGERCHEKCAP_JSON(2)
      m_buf[m_buf_s++] = '}';
     }
    else
     {
      if(m_stack_k[m_stack_it_obj_curr] < m_stack_count[m_stack_it_obj_curr])
       {
        //---
        if(m_stack_k[m_stack_it_obj_curr] > 0)
          m_buf[m_buf_s++] = ',';

        //--- Avanzamos..
        v = v.m_ctx.m_node[m_stack_ix[m_stack_it_obj_curr]].values[m_stack_k[m_stack_it_obj_curr]++]; // assing..
        next = v.m_type;
        continue;
       }

      //---
      // Ya no ...
      DOMMANAGERCHEKCAP_JSON(2)
      m_buf[m_buf_s++] = ']';
     }

    //---
    m_stack_it_obj_curr--; // Baja
    if(m_stack_it_obj_curr < 0)
      return true;

    //---
    next = 0; // break y vuleve a evaluar denbuvo...
   }

//---
  return false;
 }
}
//+------------------------------------------------------------------+
#endif // JSONPARSERBYLEO_SRC_JSONDOMSERIALIZER_MQH