from time import sleep
from io import BytesIO
import cv2
import numpy as np

def addPerson(label, ImagesPath, newFileName, oldFileName):
    try:
        #faceFilePath = '/faces/hesham-saeed2'
        faceFile = '/faces/'+ oldFileName
        face_recognizer = cv2.createLBPHFaceRecognizer()
        face_recognizer.load(faceFile)
    except:
        print('[ Error ] Problem in init/loading LBPHfacerecognizer')
    images = []
    labels = []
    image_names = os.listdir(ImagesPath)
    for image_name in image_names:
        if image_name.startswith('.'):
            continue;
        image_path = train_path + image_name
        image = cv2.imread(image_path)
		gray = cv2.cvtColor(image, cv2.COLOR_BGR2GRAY)
        face_cascade = cv2.CascadeClassifier('haarcascade_frontalface_default.xml')
        faces = face_cascade.detectMultiScale(gray, 1.3, 5)
        for (x,y,w,h) in faces:
            images.append(gray[y:y+h, x:x+w])
            labels.append(label)
    face_recognizer.train(images, np.array(labels))
    face_recognizer.save('/faces/'+newFileName)