Need to right a if statement for this code

Projects Programming
1

I did do it, took me days, then i stupidly over wrote it and now can not for the life of me remember how i done it.
So when reader 1 pops up and is read by the rfid card, it sends data, i need to be able to read this data then say if reader 0 do this or if reader 1 do that. So i need to read the byte data, but i was just messing with some other code that is reading to buffer and now i'm getting confused.
Reader 0 is a reader number and not a low or high.

#include <SPI.h>
#include <MFRC522.h>

constexpr uint8_t RST_PIN = 9;     // Configurable, see typical pin layout above
constexpr uint8_t SS_1_PIN = 10;   // Configurable, take a unused pin, only HIGH/LOW required, must be diffrent to SS 2
constexpr uint8_t SS_2_PIN = 8;    // Configurable, take a unused pin, only HIGH/LOW required, must be diffrent to SS 1

constexpr uint8_t NR_OF_READERS = 2;

byte ssPins[] = {SS_1_PIN, SS_2_PIN};

MFRC522 mfrc522[NR_OF_READERS];   // Create MFRC522 instance.

/**
   Initialize.
*/
void setup() {

  Serial.begin(9600); // Initialize serial communications with the PC
  while (!Serial);    // Do nothing if no serial port is opened (added for Arduinos based on ATMEGA32U4)

  SPI.begin();        // Init SPI bus

  for (uint8_t reader = 0; reader < NR_OF_READERS; reader++) {
    mfrc522[reader].PCD_Init(ssPins[reader], RST_PIN); // Init each MFRC522 card
    Serial.print(F("Reader "));
    Serial.print(reader);
    Serial.print(F(": "));
    mfrc522[reader].PCD_DumpVersionToSerial();
  
  }
}

/**
   Main loop.
*/
void loop() {

  for (uint8_t reader = 0; reader < NR_OF_READERS; reader++) {
    // Look for new cards

    if (mfrc522[reader].PICC_IsNewCardPresent() && mfrc522[reader].PICC_ReadCardSerial()) {
      Serial.print(F("Reader "));
      Serial.print(reader);


      // Halt PICC
      mfrc522[reader].PICC_HaltA();
      // Stop encryption on PCD
      mfrc522[reader].PCD_StopCrypto1();
    } //if (mfrc522[reader].PICC_IsNewC
  } //for(uint8_t reader
}
2

Also this was at the end of the code, i think this was to do with something else, now cant remember if i need it. If the byte part of reader number is stored to the buffer, i dont think it was, i'm really not to sure i'm just getting my head around things.

/**
 * Helper routine to dump a byte array as hex values to Serial.
 */
void dump_byte_array(byte *buffer, byte bufferSize) {
  for (byte i = 0; i < bufferSize; i++) {
    Serial.print(buffer[i] < 0x10 ? " 0" : " ");
    Serial.print(buffer[i], HEX);
  }
}
3

Ok i had a brain freeze

*/
void loop() {

  for (uint8_t reader = 0; reader < NR_OF_READERS; reader++) {
    // Look for new cards
    if (mfrc522[reader].PICC_IsNewCardPresent() && mfrc522[reader].PICC_ReadCardSerial()) {
      Serial.println(reader);
      if (reader == 1) {
        Serial.println("hi");

      }



    }
  }
}