#Name: HomeLayerlogic
#Info: Home each X layer
#Depend: GCode
#Type: postprocess
#Param: homeLayer(float:1) Home each X layer
#Param: retractAmount(float:5) Retraction amount (mm)
#Param: primeAmount(float:4.5) Prime amount (mm)

__copyright__ = "Copyright (C) 2013 Sverrir Fannar - Released under terms of the AGPLv3 License"
import re

def getValue(line, key, default = None):
	if not key in line or (';' in line and line.find(key) > line.find(';')):
		return default
	subPart = line[line.find(key) + 1:]
	m = re.search('^[0-9]+\.?[0-9]*', subPart)
	if m is None:
		return default
	try:
		return float(m.group(0))
	except:
		return default

with open(filename, "r") as f:
	lines = f.readlines()

z = 0.
x = 0.
y = 0.
allow = 0
layers = 0
currentSectionType = 'STARTOFFILE'
with open(filename, "w") as f:
	for line in lines:
		f.write(line)
		if line.startswith(';'):
			#if line.find(";total_layers"):
			#	allow = 1
			if line.find(";LAYER:") != -1:# and allow == 1:
				layers = layers + 1
				#Home all axis
				if (layers%homeLayer) == 0:
					f.write("M83\n")
					#Retract
					f.write("G1 E-%f F6000\n" % (retractAmount))
					#Home
					f.write("G28 X Y; Home X Y so that it stays aligned\n")
					f.write("G1 E%f F6000\n" % (primeAmount))
					f.write("M82\n")