beerbox/bluetooth.ino

void bluetoothCommands() {
  if (Serial3.available() > 0) {
    char command = Serial3.read();
    char subCommand = Serial3.read();

    char incomingByte = Serial3.read();
    String data;
    while (incomingByte != ';') {
      data =  String(data + incomingByte);
      incomingByte = Serial3.read();
    }

    if (command == '#') { //1 General Info Command
      if (subCommand == '1') { // Get All Drinks
        print_drinks_JSON(box, &Serial3);
      } else if (subCommand == '2') { // Get All persons
        Serial3.print("{\"persons\":[");
        for (int i = 0; i < box->personCount; i++) {
          if (i != 0)Serial3.print(",");
          print_person_JSON(box, &persons[i], &Serial3, true);
          print_person_JSON(box, &persons[i], &Serial, false);
          delay(100);
        }

        Serial3.println("]}");
      }
      else if (subCommand == '3') { //reset all counts

        for (int i = 0; i < box->personCount; i++) {
          reset_person_drinks(box, &persons[i], i);
          print_person_JSON(box, &persons[i], &Serial, false);
        }
        Serial3.println("{\"Success\"}");
        }
    } else if (command == '!') { //2 User Managment Command
      if (subCommand == '1') { // Create new User
        char incomingByte = Serial3.read();
        String personName = data;

        if (debug)Serial.println(personName);
        lcd.clear();
        lcd.print(personName);
        if (debug)Serial.println(box->maxID);
        //lcd.setCursor(0,1);
        //lcd.print("Fin pls");
        int fingerReturn = -1;
        while (fingerReturn != 0)
        {
          fingerReturn = getFingerprintEnroll(box->maxID + 1);
        }
        lcd.clear();
        lcd.print(personName);
        lcd.setCursor(0, 1);
        lcd.print("RFID pls");

        zugang = "";
        while (zugang == "") {
          getRFIDEnroll();
        }
        if (debug)Serial.println(zugang);
        box->maxID++;
        Person* newPerson = new Person;
        personName.toCharArray(newPerson->name, personName.length() + 1);
        char tmp[FILE_NAME_LEN + 1];
        sprintf(tmp, "p%03d%s", box->maxID, FILE_EXTENSION);
        strcpy(newPerson->file_name, tmp);
        zugang.toCharArray(newPerson->rfid_uuid, zugang.length() + 1);
        newPerson->finger_uuid = box->maxID;
        newPerson->credits_left = 1000;
        for (int i = 0; i < box->maxDrink; i++) {
          newPerson->drinks_taken[i] = 0;
        }
        write_pers_file(newPerson);


        zugang = ""; // reset here
        lcd.clear();
        lcd.print(personName);
        lcd.setCursor(0, 1);
        lcd.print("Sucess!");
        delay(1000);
        //and revert to normal:
        lcd.clear();
        lcd.print("Drink:");
        lcd.setCursor(0, 1);
        lcd.print(box->drinks[currentDrink].name);
      }//new User
      else if (subCommand == '2') { //get user by filename

        char filename[data.length() + 1];
        Serial.println(data);
        data.toCharArray(filename, data.length() + 1);
        if (personExists(filename)) {
          Person* aperson = &persons[getFileIndex(filename)];
          print_person_JSON(box, aperson, &Serial3, false);
        } else {
          Serial3.println("{\"Error\":\"no such file\"}");
        }

      }//get user
      else if (subCommand == '3') { //trigger user scan
        lcd.clear();
        lcd.print("Scanning");
        lcd.setCursor(0, 1);
        lcd.print("...");
        box->scanning = true;
        while (box->scanning) {
          checkFinger();
          checkRFID();
        }
        //After scan reset display
        lcd.clear();
        lcd.print("Drink:");
        lcd.setCursor(0, 1);
        lcd.print(box->drinks[currentDrink].name);

      }//user scan
      else if (subCommand == '4') { //revoke user finger by filename
        char filename[data.length() + 1];
        Serial.println(data);
        data.toCharArray(filename, data.length() + 1);
        if (personExists(filename)) {
          Person* changePerson = &persons[getFileIndex(filename)];

          lcd.clear();
          lcd.print(changePerson->name);
          int fingerReturn = -1;
          while (fingerReturn != 0)
          {
            fingerReturn = getFingerprintEnroll(changePerson->finger_uuid);
          }
          Serial3.println("{\"Success\"}");
          //No need to save finger since id is not changed in the process
        } else {
          Serial3.println("{\"Error\":\"no such file\"}");
        }
        //reset display
        lcd.clear();
        lcd.print("Drink:");
        lcd.setCursor(0, 1);
        lcd.print(box->drinks[currentDrink].name);

      }//revoke finger
      else if (subCommand == '5') { //revoke user rfid by filename
        char filename[data.length() + 1];
        Serial.println(data);
        data.toCharArray(filename, data.length() + 1);
        if (personExists(filename)) {
          lastPersonIndex = getFileIndex(filename);
          Person* changePerson = &persons[lastPersonIndex];
          lcd.clear();
          lcd.print(changePerson->name);
          lcd.setCursor(0, 1);
          lcd.print("RFID pls");

          zugang = "";
          while (zugang == "") {
            getRFIDEnroll();
          }
          if (debug)Serial.println(zugang);
          //save zugang
          zugang.toCharArray(changePerson->rfid_uuid, zugang.length() + 1);
          //lastPersonIndex is set in the beginning
          update_pers_file();
          Serial3.println("{\"Success\"}");
          //reset display
          lcd.clear();
          lcd.print("Drink:");
          lcd.setCursor(0, 1);
          lcd.print(box->drinks[currentDrink].name);

        } else {
          Serial3.println("{\"Error\":\"no such file\"}");
        }
      }//revoke rfid
      else if (subCommand == '6') { //delete user by filename
        char filename[data.length() + 1];
        Serial.println(data);
        data.toCharArray(filename, data.length() + 1);
        if (personExists(filename)) {
          //Delete file
          SD.remove(filename);
          //rescan it!
          delete [] persons;  // When done, free memory pointed to
          persons = NULL;
          persons = readAllPersons();
          if (debug)Serial.println(sizeof(persons));
        } else {
          Serial3.println("{\"Error\":\"no such file\"}");
        }
      }//delete user
      else if (subCommand == '7') { //set user credits
        char filename[data.length() + 1];
        Serial.println(data);
        data.toCharArray(filename, data.length() + 1);
        if (personExists(filename)) {
          //Scann second time for credits
          char incomingByte = Serial3.read();
          String data2;
          while (incomingByte != ';') {
            data2 =  String(data2 + incomingByte);
            incomingByte = Serial3.read();
          }
          char credits_string[data2.length() + 1];
          data2.toCharArray(credits_string, data2.length() + 1);
          lastPersonIndex = getFileIndex(filename);
          Person* setPerson = &persons[lastPersonIndex];
          setPerson->credits_left = atoi(credits_string);
          update_pers_file();
          print_person_JSON(box, setPerson, &Serial3, false);

        } else {
          Serial3.println("{\"Error\":\"no such file\"}");
        }

      }//set credits
      else if (subCommand == '8') { //set name by filename
        //TODO: Better namechecking
        char filename[data.length() + 1];
        Serial.println(data);
        data.toCharArray(filename, data.length() + 1);
        if (personExists(filename)) {
          //Scann second time for newName
          char incomingByte = Serial3.read();
          String data2;
          while (incomingByte != ';') {
            data2 =  String(data2 + incomingByte);
            incomingByte = Serial3.read();
          }
          char name_string[11];
          data2.toCharArray(name_string, data2.length() + 1);
          lastPersonIndex = getFileIndex(filename);
          Person* setPerson = &persons[lastPersonIndex];
          strcpy(setPerson->name, name_string);
          update_pers_file();
          print_person_JSON(box, setPerson, &Serial3, false);
        } else {
          Serial3.println("{\"Error\":\"no such file\"}");
        }
      }//set name
    } // User Managment Command
  } //BLE available

}//end function



void print_person_JSON(Beerbox *box, Person *aperson, HardwareSerial* com, bool less) {

  if (less) {
    sprintf(toprint, "{\"name\": \"%s\",\"filename\":\"%s\"}", aperson->name, aperson->file_name);
    com->write(toprint);
  } else {
   
  sprintf(toprint, "{\"name\": \"%s\",\"filename\":\"%s\",\"creditsleft\":\"%i\",\"drinks\":[", aperson->name, aperson->file_name, aperson->credits_left);
  com->write(toprint);
  for (int i = 0; i < box->maxDrink; i++) {
    if (aperson->drinks_taken[i] != -1) {
      if (i == 0) sprintf(toprint, "{\"%s\":\"%i\"}", box->drinks[i].name, aperson->drinks_taken[i]);
      else sprintf(toprint, ",{\"%s\":\"%i\"}", box->drinks[i].name, aperson->drinks_taken[i]);
      com->write(toprint);
    }
  }
  com->println("]}");
  box->scanning = false;
  }
} // end print JSON

void print_drinks_JSON(Beerbox *box, HardwareSerial* com) {
  com->print("{\"drinks\":[");
  for (int i = 0; i < box->maxDrink; i++) {
    if (box->drinks[i].price != -1) {
      if (i == 0) sprintf(toprint, "{\"id\":\"%i\",\"name\":\"%s\",\"price\":\"%i\"}", i, box->drinks[i].name, box->drinks[i].price);
      else sprintf(toprint, ",{\"id\":\"%i\",\"name\":\"%s\",\"price\":\"%i\"}", i, box->drinks[i].name, box->drinks[i].price);
      com->write(toprint);
    }
  }
  com->print("]}");

}

void reset_person_drinks(Beerbox *box,Person *aperson,int personIndex){
    for (int i = 0; i < box->maxDrink; i++) {
    if (box->drinks[i].price != -1) {
      aperson->drinks_taken[i] = 0;
      lastPersonIndex = personIndex;
              update_pers_file();
      }
    }
    
  }