/****************************************************************************************************************************
  WiFi_URLEncoder.cpp - Dead simple HTTP WebClient.
  For any WiFi shields, such as WiFiNINA W101, W102, W13x, or custom, such as ESP8266/ESP32-AT, Ethernet, etc

  WiFiWebServer is a library for the ESP32-based WiFi shields to run WebServer
  Forked and modified from ESP8266 https://github.com/esp8266/Arduino/releases
  Forked and modified from Arduino WiFiNINA library https://www.arduino.cc/en/Reference/WiFiNINA
  Built by Khoi Hoang https://github.com/khoih-prog/WiFiWebServer
  Licensed under MIT license

  Original author:
  @file       Esp8266WebServer.h
  @author     Ivan Grokhotkov

  Version: 1.10.1

  Version Modified By   Date      Comments
  ------- -----------  ---------- -----------
  1.0.0   K Hoang      12/02/2020 Initial coding for SAMD21, Nano 33 IoT, etc running WiFiNINA
  ...
  1.6.0   K Hoang      13/02/2022 Add support to new ESP32-S3 and ESP32_C3
  1.6.1   K Hoang      13/02/2022 Fix v1.6.0 issue
  1.6.2   K Hoang      22/02/2022 Add support to megaAVR using Arduino megaAVR core
  1.6.3   K Hoang      02/03/2022 Fix decoding error bug
  1.7.0   K Hoang      05/04/2022 Fix issue with Portenta_H7 core v2.7.2+
  1.8.0   K Hoang      26/04/2022 Add WiFiMulti library support and examples
  1.9.0   K Hoang      12/08/2022 Add support to RASPBERRY_PI_PICO_W using CYW4343 WiFi
  1.9.1   K Hoang      13/08/2022 Add WiFiMulti support to RASPBERRY_PI_PICO_W using CYW4343 WiFi
  1.9.2   K Hoang      16/08/2022 Workaround for RP2040W WiFi.status() bug
  1.9.3   K Hoang      16/08/2022 Better workaround for RP2040W WiFi.status() bug using ping() to local gateway
  1.9.4   K Hoang      06/09/2022 Restore support to ESP32 and ESP8266
  1.9.5   K Hoang      10/09/2022 Restore support to Teensy, etc. Fix bug in examples
  1.10.0  K Hoang      13/11/2022 Add new features, such as CORS. Update code and examples
  1.10.1  K Hoang      24/11/2022 Using new WiFi101_Generic library to send larger data
 *****************************************************************************************************************************/

// Library to simplify HTTP fetching on Arduino
// (c) Copyright Arduino. 2019
// Released under Apache License, version 2.0

#define _WIFI_LOGLEVEL_     0

#include "utility/WiFiDebug.h"
#include "WiFi_HTTPClient/WiFi_URLEncoder.h"

////////////////////////////////////////

WiFiURLEncoderClass::WiFiURLEncoderClass()
{
}

////////////////////////////////////////
WiFiURLEncoderClass::~WiFiURLEncoderClass()
{
}

////////////////////////////////////////

String WiFiURLEncoderClass::encode(const char* str)
{
  return encode(str, strlen(str));
}

////////////////////////////////////////

String WiFiURLEncoderClass::encode(const String& str)
{
  return encode(str.c_str(), str.length());
}

////////////////////////////////////////

String WiFiURLEncoderClass::encode(const char* str, int length)
{
  String encoded;

  encoded.reserve(length);

  for (int i = 0; i < length; i++)
  {
    char c = str[i];

    const char HEX_DIGIT_MAPPER[] = {'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F'};

    if (isAlphaNumeric(c) || (c == '-') || (c == '.') || (c == '_') || (c == '~'))
    {
      encoded += c;
    }
    else
    {
      char s[4];

      s[0] = '%';
      s[1] = HEX_DIGIT_MAPPER[(c >> 4) & 0xf];
      s[2] = HEX_DIGIT_MAPPER[(c & 0x0f)];
      s[3] = 0;

      encoded += s;
    }
  }

  return encoded;
}

////////////////////////////////////////

WiFiURLEncoderClass WiFiURLEncoder;