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/* Save data choosing from the user by the WebForm after click submit in JSON file on the SPIFFS
   Loading the data from the JSON file from the SPIFFS
*/
void loadConfig()
{
  if (SPIFFS.exists("/config.json"))
  {
    //file exists, reading and loading
    Serial.println("reading config file");
    File configFile = SPIFFS.open("/config.json", "r");
    if (configFile)
    {
      Serial.println("opened config file");
      size_t size = configFile.size();
      // Allocate a buffer to store contents of the file.
      std::unique_ptr<char[]> buf(new char[size]);
 
      configFile.readBytes(buf.get(), size);
      DynamicJsonBuffer jsonBuffer;
      JsonObject& json = jsonBuffer.parseObject(buf.get());
      // json.printTo(Serial); // print to serial the json file
      // serializeJson(json, Serial); // print to serial the json file
      if (json.success())
      {
        PlantS1 = json["TargetSoilPlant1"];
        PlantS2 = json["TargetSoilPlant2"];
        PlantS3 = json["TargetSoilPlant3"];
        PlantS4 = json["TargetSoilPlant4"];
        PlantS5 = json["TargetSoilPlant5"];
        PlantS6 = json["TargetSoilPlant6"];
        PlantS7 = json["TargetSoilPlant7"];
      }
      else {
        Serial.println("failed to load json config");
      }
    }
    else {
      Serial.println("Failed to open config file");
    }
    configFile.close();
    Serial.print("TargetSoilPlant1 :"); Serial.println(PlantS1);
    Serial.print("TargetSoilPlant2 :"); Serial.println(PlantS2);
    Serial.print("TargetSoilPlant3 :"); Serial.println(PlantS3);
    Serial.print("TargetSoilPlant4 :"); Serial.println(PlantS4);
    Serial.print("TargetSoilPlant5 :"); Serial.println(PlantS5);
    Serial.print("TargetSoilPlant6 :"); Serial.println(PlantS6);
    Serial.print("TargetSoilPlant7 :"); Serial.println(PlantS7);
  }
  else {
    Serial.println("The JSON file doesn't exist ");
  }
}
 
void saveConfig()
{
  if (SPIFFS.exists("/config.json"))
  {
    SPIFFS.remove("/config.json");
  }
  //file exists, Saving configuration
  Serial.println("saving config");
  DynamicJsonBuffer jsonBuffer;
  JsonObject& json = jsonBuffer.createObject();
  json["TargetSoilPlant1"] = PlantS1;
  json["TargetSoilPlant2"] = PlantS2;
  json["TargetSoilPlant3"] = PlantS3;
  json["TargetSoilPlant4"] = PlantS4;
  json["TargetSoilPlant5"] = PlantS5;
  json["TargetSoilPlant6"] = PlantS6;
  json["TargetSoilPlant7"] = PlantS7;
 
  File configFile = SPIFFS.open("/config.json", "w");
  if (!configFile)
  {
    Serial.println("failed to create file");
    return;
  }
  json.prettyPrintTo(Serial);
 
  if (json.printTo(configFile) == 0)
  {
    Serial.println(F("Failed to write to file"));
  }
  configFile.close();
  //end save
}