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import os
from datasource import datasource
from xml.dom import minidom
from xml.dom.minidom import Document
from input import inputText
class satxml(datasource):
def __init__(self, filename = "satellites.xml"):
self.filename = filename
datasource.__init__(self)
if not os.path.isfile(filename):
print "File %s doesn't exist. Creating it." % filename
def getStatus(self):
text = datasource.getStatus(self)
return text
def getCapabilities(self):
return [("set filename", self.setFilename), ("read file", self.read), ("write file", self.write), ("print all", self.printAll)]
def getName(self):
return "satellites.xml"
def setFilename(self):
print "Please give a filename <satellites.xml>:"
filename = inputText()
if filename == "":
self.filename = "satellites.xml"
else:
self.filename = filename
print "Filename set to %s" % self.filename
def read(self):
basicsatxml = minidom.parse(self.filename)
for sat in basicsatxml.firstChild.childNodes:
if sat.nodeType == sat.ELEMENT_NODE and sat.localName == "sat":
print sat.localName
satname = str(sat.getAttribute("name"))
satpos = str(sat.getAttribute("position"))
self.addSat(satname, satpos)
for transponder in sat.childNodes:
if transponder.nodeType == transponder.ELEMENT_NODE and transponder.localName == "transponder":
parameters = {}
paramlist = ["frequency", "symbol_rate", "polarization", "fec", "system", "modulation", "tsid", "onid"]
for param in paramlist:
entry = str(transponder.getAttribute(param))
if entry != "":
parameters[param] = entry
if len(parameters.keys()) > 1:
self.addTransponder(satpos, parameters)
print self.transponderlist
def write(self):
satxml = Document()
satellites = satxml.createElement("satellites")
satxml.appendChild(satellites)
satlist = self.transponderlist.keys()
print self.transponderlist
satlist.sort()
for sat in satlist:
xmlsat = satxml.createElement("sat")
xmlsat.setAttribute("name", self.satnames[sat])
xmlsat.setAttribute("flags", "1")
xmlsat.setAttribute("position", sat)
satellites.appendChild(xmlsat)
transponders = self.transponderlist[sat]
transponders.sort(key = lambda a: a["frequency"])
for transponder in transponders:
xmltransponder = satxml.createElement("transponder")
paramlist = ["frequency", "symbol_rate", "polarization", "fec", "system", "modulation", "tsid", "onid"]
for param in paramlist:
if transponder.has_key(param):
xmltransponder.setAttribute(param, transponder[param])
xmlsat.appendChild(xmltransponder)
prettyxml = satxml.toprettyxml()
print prettyxml
file = open(self.filename, "w")
file.write(prettyxml)
file.close()
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