Stocks market Analyzer

#define CUSTOM_SETTINGS
#define INCLUDE_INTERNET_SHIELD
#define INCLUDE_TERMINAL_SHIELD
#define INCLUDE_SMS_SHIELD

/* Include 1Sheeld library. */
#include <OneSheeld.h>

/* Create an Http request with openweathermap.org api url. */
/* It's important to be created here as a global object. */
/*  the link consists from 3 parts
http://query.yahooapis.com/v1/public/yql?q=select%20*%20from%20yahoo.finance.quotes%20where%20symbol%20in%20%28%27
GOGL
%27%29&format=json&diagnostics=true&env=http://datatables.org/alltables.env

where GOGL is the holder indicator
*/
HttpRequest request("http://query.yahooapis.com/v1/public/yql?q=select%20*%20from%20yahoo.finance.quotes%20where%20symbol%20in%20%28%27GOGL%27%29&format=json&diagnostics=true&env=http://datatables.org/alltables.env");
static boolean isSent = false;

void setup() 
{
  /* Start communication. */
  OneSheeld.begin();
  /* Subscribe to success callback for the request. */
  request.setOnSuccess(&onSuccess);
  /* Subscribe to json value replies. */
  request.getResponse().setOnJsonResponse(&onJsonReply);
  /* Subscribe to response errors. */
  request.getResponse().setOnError(&onResponseError);
  /* Subscribe to Internet errors. */
  Internet.setOnError(&onInternetError); 
  
  Internet.performGet(request);
}

void loop()
{
}

void onSuccess(HttpResponse & response)
{
  /* Using the response to query the Json chain till the required value. */
  /* i.e. Get the value of 'main' in the first object of the array 'weather' in the response. */
  /* Providing that the response is in JSON format. */
  response["query"]["results"]["quote"]["LastTradePriceOnly"].query();
}

void onJsonReply(JsonKeyChain & hell,char * output)
{
  /* 1Sheeld responds using text-to-speech shield. */
  Terminal.println(output);
  float x=atof(output);
  if(x > 3.20){
    if(!isSent){
      Terminal.println("Arrow is high! It's time to sell.");
      SMS.send("+0123456789","Arrow is high! It's time to sell.");
      isSent = true;
    }  
  }else if(x < 3.0){
    if(!isSent){
      Terminal.println("Arrow is low! It's prefered to buy now.");
      SMS.send("+0123456789","Arrow is low! It's prefered to buy now.");
      isSent = true;
    }  
  }else{
    isSent = false;
  }
  OneSheeld.delay(10000);
  Internet.performGet(request);
}

void onResponseError(int errorNumber)
{
  /* Print out error Number.*/
  Terminal.print("Response error:");
  switch(errorNumber)
  {
    case INDEX_OUT_OF_BOUNDS: Terminal.println("INDEX_OUT_OF_BOUNDS");break;
    case RESPONSE_CAN_NOT_BE_FOUND: Terminal.println("RESPONSE_CAN_NOT_BE_FOUND");break;
    case HEADER_CAN_NOT_BE_FOUND: Terminal.println("HEADER_CAN_NOT_BE_FOUND");break;
    case NO_ENOUGH_BYTES: Terminal.println("NO_ENOUGH_BYTES");break;
    case REQUEST_HAS_NO_RESPONSE: Terminal.println("REQUEST_HAS_NO_RESPONSE");break;
    case SIZE_OF_REQUEST_CAN_NOT_BE_ZERO: Terminal.println("SIZE_OF_REQUEST_CAN_NOT_BE_ZERO");break;
    case UNSUPPORTED_HTTP_ENTITY: Terminal.println("UNSUPPORTED_HTTP_ENTITY");break;
    case JSON_KEYCHAIN_IS_WRONG: Terminal.println("JSON_KEYCHAIN_IS_WRONG");break;
  }
}

void onInternetError(int requestId, int errorNumber)
{
  /* Print out error Number.*/
  Terminal.print("Request id:");
  Terminal.println(requestId);
  Terminal.print("Internet error:");
  switch(errorNumber)
  {
    case REQUEST_CAN_NOT_BE_FOUND: Terminal.println("REQUEST_CAN_NOT_BE_FOUND");break;
    case NOT_CONNECTED_TO_NETWORK: Terminal.println("NOT_CONNECTED_TO_NETWORK");break;
    case URL_IS_NOT_FOUND: Terminal.println("URL_IS_NOT_FOUND");break;
    case ALREADY_EXECUTING_REQUEST: Terminal.println("ALREADY_EXECUTING_REQUEST");break;
    case URL_IS_WRONG: Terminal.println("URL_IS_WRONG");break;
  }
}