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KeyboardListener.py
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KeyboardListener.py
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from pynput import keyboard
import time
import json
class KeyboardListener:
def __init__(self, word, template_number, operation=""):
self.final_dict = {}
self.total_index = 0
self.word = word
self.temp_word = ''
self.word_len = len(self.word)
self.press = [0] * len(self.word)
self.release = [0] * len(self.word)
self.probe_list = []
self.template_number = template_number
self.template_index = 0
self.operation = operation
def on_press(self, key):
self.press[self.total_index] = time.time()
if key == keyboard.Key.space:
self.temp_word += ' '
elif not hasattr(key, 'char'):
print("\nThe word you typed is not correct, please try again")
self.reset()
return False
else:
self.temp_word += key.char
def on_release(self, key):
self.release[self.total_index] = time.time()
self.total_index += 1
if self.total_index == self.word_len:
if self.temp_word != self.word:
print("\nThe word you typed is not correct, please try again")
else:
self.template_index += 1
self.update_data()
self.reset()
return False
def reset(self):
self.total_index = 0
self.press = [0] * len(self.word)
self.release = [0] * len(self.word)
self.temp_word = ''
def update_data(self):
press_press = []
hold_1 = []
hold_2 = []
for index, value in enumerate(self.press):
if value == 0:
self.press[index] = self.release[index - 1]
for index, (press, release) in enumerate(zip(self.press, self.release)):
if index == 0:
hold_1.append(release - press)
elif index == self.word_len - 1:
hold_2.append(release - press)
else:
hold_1.append(release - press)
hold_2.append(release - press)
if index != 0:
press_press.append(press - self.press[index - 1])
feature_dict = {}
for index in range(self.word_len - 1):
feature_dict[index] = {'hold_1': 0, 'press_press': 0, 'release_press': 0,
'release_release': 0, 'hold_2': 0, 'total_time': 0,
'slope_h1': 0, 'slope_pp': 0, 'slope_rp': 0,
'slope_rr': 0, 'slope_h2': 0, 'slope_tt': 0
}
for index in range(self.word_len - 1):
feature_dict[index]['hold_1'] = hold_1[index]
feature_dict[index]['press_press'] = press_press[index]
feature_dict[index]['release_press'] = (
press_press[index] - hold_1[index])
feature_dict[index]['release_release'] = (
(press_press[index] - hold_1[index]) + hold_2[index])
feature_dict[index]['hold_2'] = hold_2[index]
feature_dict[index]['total_time'] = (
press_press[index] + hold_2[index])
for index in range(self.word_len - 1):
if index != (self.word_len - 2):
feature_dict[index]['slope_h1'] = self.compute_slope(
feature_dict[index + 1]['hold_1'], feature_dict[index]['hold_1'])
feature_dict[index]['slope_pp'] = self.compute_slope(
feature_dict[index + 1]['press_press'], feature_dict[index]['press_press'])
feature_dict[index]['slope_rp'] = self.compute_slope(
feature_dict[index + 1]['release_press'], feature_dict[index]['release_press'])
feature_dict[index]['slope_rr'] = self.compute_slope(
feature_dict[index + 1]['release_release'], feature_dict[index]['release_release'])
feature_dict[index]['slope_h2'] = self.compute_slope(
feature_dict[index + 1]['hold_2'], feature_dict[index]['hold_2'])
feature_dict[index]['slope_tt'] = self.compute_slope(
feature_dict[index + 1]['total_time'], feature_dict[index]['total_time'])
self.probe_list.append(feature_dict)
self.reset()
def compute_slope(self, a, b):
return a - b
def start_listener(self):
timer = time.perf_counter()
time.sleep(1)
if self.operation == "identification":
print('Please, type "il futuro è passato di qui"')
while self.template_index < self.template_number:
print('\nStart listener')
with keyboard.Listener(on_press=self.on_press, on_release=self.on_release) as listener:
listener.join()
current_time = time.perf_counter()
if current_time - timer > 1:
self.reset()
timer = current_time
if self.template_index >= self.template_number:
break
time.sleep(0.5)
print("\nListener stopped")