#!/usr/bin/python
# Soil Sensor Label Image Generator
# Takes a node ID (in hexadecimal, no leading 0x) as the first
# command-line argument and writes a png image of a label to Label.png
# Label real size: 1.35" wide x .70" tall
# Label usable area dimensions: 1.19" wide x .618", 180 DPI assumed (214x111)
import sys
import subprocess
import binascii

if len(sys.argv) != 2:
	print "Usage: label.py <node ID, no leading 0x>"
	sys.exit(-1)

subprocess.call(["rm", "-f", "barcode.png", "Label.png", "text1.png"])

subprocess.call(["zint", "-o", "barcode.png", "-b", "71", "--square", "--binary", "-d", binascii.unhexlify(sys.argv[1])])
subprocess.call(["convert", "Label Base.png", "(", "barcode.png", "-scale", "200%", ")", "-geometry",  "+8+7", "-composite", "Label.png"])

subprocess.call(["convert", "-size", "60x30", "-background", "white", "-font", "DejaVu-Sans-Mono-Regular", "-pointsize", "10", "-fill", "black", "-gravity", "NorthWest", "+antialias", "label:%s"%(sys.argv[1][0:9] + "\n" + sys.argv[1][9:18]), "text1.png"])
subprocess.call(["convert", "Label.png", "(", "text1.png", ")", "-geometry",  "+12+81", "-composite", "Label.png"])