from qrcodegen import QrCode, QrSegment
import sys

def print_usage():
	"""Print the usage help."""
	print("Usage:")
	print(sys.argv[0] + " <text to put in qrcode>")

def gen_qr(text):
	"""Gen the QR Code based on the given text."""
	return QrCode.encode_text(text, QrCode.Ecc.LOW)

def print_qr(qrcode):
	"""Prints the given QrCode object to the console."""
	border = 4
	for y in range(-border, qrcode.get_size() + border):
		for x in range(-border, qrcode.get_size() + border):
			print(u"\u2588 "[1 if qrcode.get_module(x,y) else 0] * 2, end="")
		print()
	print()

def main():
	"""The main application program."""
	if len(sys.argv) == 2:
		if sys.argv[1] != "":
			print_qr(gen_qr(sys.argv[1]))
		else:
			print_usage()
	else:
		print_usage()

if __name__ == "__main__":
	main()