JsonWebClient.h

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#pragma once
#ifndef JsonWebClient_h
#define JsonWebClient_h

#include "TBCDebug.h"
#include "Arduino.h"
#include <Client.h>
#include <ArduinoJson.h>

#ifndef JWC_BUFF_SIZE
#ifdef ESP8266
#define JWC_BUFF_SIZE 1000
#else
#define JWC_BUFF_SIZE 10000
#endif
#endif


enum class JwcProcessError : int
{
  Ok = 0,
  HttpErr    = -1,
  MsgTooBig  = -2,
  MsgJsonErr = -3
};

static String JwcProcessErrorString[] = {"Ok", "HttpErr", "MsgTooBig", "MsgJsonErr"};

static String toString(JwcProcessError err)
{
  return JwcProcessErrorString[(-1) * (int) err];
}



// Inspired by PubSubClient by Nick O'Leary (http://knolleary.net)
#ifdef ESP8266
#include <functional>
#define JWC_CALLBACK_MESSAGE_SIGNATURE std::function<void(void*, JwcProcessError, JsonObject&)> callbackSuccess
#define JWC_CALLBACK_ERROR_SIGNATURE std::function<void(void*, JwcProcessError, Client*)> callbackError
#else
#define JWC_CALLBACK_MESSAGE_SIGNATURE void (*callbackSuccess)(void*, JwcProcessError, JsonObject&)
#define JWC_CALLBACK_ERROR_SIGNATURE void (*callbackError)(void*, JwcProcessError, Client*)
#endif

enum class JwcClientState : int
{
  Unconnected = 0,
  Connected = 1,
  Waiting = 2,
  Headers = 3,
  Json = 4
};

static String JwcClientStateString[] = {"Unconnected", "Connected", "Waiting", "Headers", "Json"};

static String toString(JwcClientState state)
{
  return JwcClientStateString[(int) state];
}


class JsonWebClient
{
  private:
    JwcClientState State = JwcClientState::Unconnected;
    Client* NetClient;
    String Host;
    int Port;
    long ContentLength = JWC_BUFF_SIZE;
    bool HttpStatusOk = false;
    void reConnect();
    void* CallBackObject;
    JWC_CALLBACK_MESSAGE_SIGNATURE;
    JWC_CALLBACK_ERROR_SIGNATURE;
    bool processHeader();
    bool processJson();

  public:
    JsonWebClient (
      Client* netClient,
      String host,
      int port,
      void* callBackObject,
      JWC_CALLBACK_MESSAGE_SIGNATURE,
      JWC_CALLBACK_ERROR_SIGNATURE);
    bool fire (String commands[], int count);
    JwcClientState state();
    bool loop();
    bool stop();
};
#endif