//+------------------------------------------------------------------+
//|                                                         Main.mqh |
//|                                  Copyright 2026, Niquel Mendoza. |
//|                                             https://www.mql5.com |
//+------------------------------------------------------------------+
#property copyright "Copyright 2026, Niquel Mendoza."
#property link      "https://www.mql5.com"
#property strict

#ifndef MQLARTICLES_UTILS_BUFFERBUILD_MAIN_MQH
#define MQLARTICLES_UTILS_BUFFERBUILD_MAIN_MQH

//+------------------------------------------------------------------+
//|                                                                  |
//+------------------------------------------------------------------+
#include "UrlEncode\\Main.mqh"

//+------------------------------------------------------------------+
//|                                                                  |
//+------------------------------------------------------------------+
namespace TSN
{
//+------------------------------------------------------------------+
//|                                                                  |
//+------------------------------------------------------------------+
// Esta clase noramlte se usara con web requeset.. para evita concatener string
// cuando se arma los datos.. es como un builder general...

//+------------------------------------------------------------------+
//|                                                                  |
//+------------------------------------------------------------------+
#define MQLART_BUFFER_INCREASE(req) \
if((req) >= m_r)                \
 {                              \
  m_r += (req) + 128;           \
  ArrayResize(m_raw, m_r, m_r); \
 }

//+------------------------------------------------------------------+
//|                                                                  |
//+------------------------------------------------------------------+
struct CBufferBuild
 {
public:
                     CBufferBuild(int reserve) : m_s(0), m_r(reserve) { ArrayResize(m_raw, reserve, reserve); }
                     CBufferBuild() : m_s(0), m_r(0) {}

  //---
  int                m_s;
  int                m_r;
  uchar              m_raw[];

  //---
  // Escribe decodificando con URL Encode
  // retorna i (posicion leida en str)
  void                WriteUrlEncode(const string& str, int len = WHOLE_ARRAY);

  //---
  // Escribe tal cual un CharArrayToString
  void               WriteRaw(const string& str, uint cp = CP_UTF8);
 };

//+------------------------------------------------------------------+
//|                                                                  |
//+------------------------------------------------------------------+
void CBufferBuild::WriteRaw(const string &str, uint cp = CP_UTF8)
 {
//---
  const int l = StringLen(str);
  const int max_bytes = (l << 2) + 1;
  MQLART_BUFFER_INCREASE(max_bytes)

//---
  int written = StringToCharArray(str, m_raw, m_s, WHOLE_ARRAY, cp);
  if(written > 0 && m_raw[m_s + written - 1] == 0)
    written--;

//---
  m_s += written;
 }

//+------------------------------------------------------------------+
//|                                                                  |
//+------------------------------------------------------------------+
void CBufferBuild::WriteUrlEncode(const string &str, int len = WHOLE_ARRAY)
 {
//---
  if(len == WHOLE_ARRAY)
    len = StringLen(str);

//---
  const int req = (len << 3) + len; // *9
  MQLART_BUFFER_INCREASE(req)

//---
  CUrlEncode::UrlEncode(str, len, m_raw, m_s);
 }
}
//+------------------------------------------------------------------+
#endif // MQLARTICLES_UTILS_BUFFERBUILD_MAIN_MQH