/usr/share/cyclograph/iofile.py is in cyclograph 1.6.1-1.
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"""iofile.py"""
# Copyright (C) 2008, 2009, 2010, 2011, 2012, 2013 Federico Brega, Pierluigi Villani
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 3
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
from __future__ import with_statement
import csv
import codecs
import logging
import os
import xml.dom.minidom
import zlib
from altitude_downloader import distance, haversine, point_conversion
CSV_VERSION = "1.1"
CGX_VERSION = "1.0"
STAT_VER = 2
def save_file(filename, slope):
"""Save .cgx file"""
doc = xml.dom.minidom.Document()
cg = doc.createElement(u"cyclographxml")
cg.setAttribute(u"version", CGX_VERSION)
doc.appendChild(cg)
sl = doc.createElement(u"slope")
cg.appendChild(sl)
sl.appendChild(__createTextElement(doc, u"name", slope.name))
sl.appendChild(__createTextElement(doc, u"country", slope.country))
author = doc.createElement(u"author")
author.appendChild(__createTextElement(doc, u"name", slope.author))
author.appendChild(__createTextElement(doc, u"email", slope.email))
sl.appendChild(author)
sl.appendChild(__createTextElement(doc, u"info", slope.comment))
cps = doc.createElement(u"cps")
for cpt in slope.cps:
cp = doc.createElement(u"cp")
(dist, alt, desc) = cpt
cp.setAttribute(u"alt", "%.3f" % alt)
cp.setAttribute(u"dist", "%.3f" % dist)
if desc != "":
cp.setAttribute(u"desc", desc)
cps.appendChild(cp)
sl.appendChild(cps)
coords = doc.createElement(u"coords")
for coor in slope.coords:
coord = doc.createElement(u"coord")
(lat, lon) = coor
coord.setAttribute(u"lon", "%.6f" % lon)
coord.setAttribute(u"lat", "%.6f" % lat)
coords.appendChild(coord)
sl.appendChild(coords)
with open(filename,"wb") as fid:
doc.writexml(fid, encoding='utf-8', newl='\n')
def __createTextElement(doc, name, text):
elem = doc.createElement(name)
ptext = doc.createTextNode(text)
elem.appendChild(ptext)
return elem
#def save_file(filename, slope):
# """Save .csv file"""
# #Control if the right extension is given by user
# if not filename.endswith('.csv'):
# filename = filename + '.csv'
# #fid = open(filename,'wb')
# # Too bad there is no csv unicode writer so open in ASCII mode and convert utf-8 to ASCII
# # Be carreful to also encode delimiter and quotechar if they are not ASCII
# with open(filename, mode='wb') as fid:
# #fid.write ("%s;%s;%s\n" % (slope.name, slope.country, slope.comment) )
# csv_writer = csv.writer(fid, delimiter=';', quotechar='\"')
# def to_unicode(item):
# if isinstance(item, unicode):
# item = item.encode('utf-8')
# return item
# csv_writer.writerow( map(to_unicode, (str(CSV_VERSION), slope.name, slope.country,
# slope.author, slope.email, slope.comment)) )
# for row in slope.cps:
# csv_writer.writerow(map(to_unicode, row))
# #for cpt in slope.cps:
# # fid.write ("%.3f;%.3f;%s\n" % cpt)
# #fid.close()
def open_file(filename, slopelist, slopenum, extension=''):
"""Open generic file"""
statusok = True
if not extension:
if isinstance(filename, basestring):
extension = filename.split('.')[-1].lower()
else:
extension = 'cgx' #when used stdin
if extension == 'cgx':
try:
statusok = __open_cgx(filename, slopelist, slopenum)
except IOError:
statusok = False
elif extension == 'csv':
try:
statusok = __open_csv(filename, slopelist, slopenum)
except IOError:
statusok = False
elif extension == 'xml':
try:
statusok = __open_xml(filename, slopelist, slopenum)
except IOError:
statusok = False
elif extension == 'gpx':
try:
gpxfile = load_gpxfile(filename)
gpxfile.newSlope(slopelist, slopenum, -1)
statusok = True
except IOError:
statusok = False
elif extension == 'kml':
try:
kmlfile = load_kmlfile(filename)
kmlfile.newSlope(slopelist, slopenum, -1)
statusok = True
except IOError:
statusok = False
elif extension == 'fitlog':
try:
fitlogfile = load_fitlogfile(filename)
fitlogfile.newSlope(slopelist, slopenum, -1)
statusok = True
except IOError:
statusok = False
elif extension == 'tcx':
try:
tcxfile = load_tcxfile(filename)
tcxfile.newSlope(slopelist, slopenum, -1)
statusok = True
except IOError:
statusok = False
elif extension == 'sal':
try:
__open_sal(filename, slopelist, slopenum)
except IOError:
statusok = False
elif extension == 'crp':
try:
__open_crp(filename, slopelist, slopenum)
except IOError:
statusok = False
elif extension == 'txt':
try:
__open_txt(filename, slopelist, slopenum)
except IOError:
statusok = False
else:
statusok = False
return statusok
### Functions defining how to open a certain file format.
#csv unicode implementation, std library doesn't implements it yet :-(
#from http://docs.python.org/library/csv.html#csv-examples
def unicode_csv_reader(unicode_csv_data, dialect=csv.excel, **kwargs):
# csv.py doesn't do Unicode; encode temporarily as UTF-8:
csv_reader = csv.reader(utf_8_encoder(unicode_csv_data),
dialect=dialect, **kwargs)
for row in csv_reader:
# decode UTF-8 back to Unicode, cell by cell:
yield [unicode(cell, 'utf-8') for cell in row]
def utf_8_encoder(unicode_csv_data):
for line in unicode_csv_data:
yield line.encode('utf-8')
def __open_csv(filename, slopelist, slopenum):
"""Open a Cyclograph CSV file (legacy)"""
if isinstance(filename, basestring):
fid = codecs.open(filename, encoding='utf-8', mode='rb')
else:
fid = filename
#with open(filename, 'rb') as fid:
csv_reader = unicode_csv_reader(fid, delimiter=';', quotechar='\"')
line = csv_reader.next()
#Make it more robust: if file has less than the required elements
#it considers them as empty strings and doesn't consider exceding ones.
if len(line) < 6:
line.extend([""] * (6-len(line)) )
(version, slopename, slopestate, slopeauthor, authoremail, slopecomment) = line[:6]
status = True
#This is a legacy format so always warn about that, regardless the version number
status = STAT_VER
slopelist.set_name(slopenum, slopename)
slopelist.set_country(slopenum, slopestate)
slopelist.set_author(slopenum, slopeauthor)
slopelist.set_email(slopenum, authoremail)
slopelist.set_comment(slopenum, slopecomment)
for line in csv_reader:
#(dist, alt, name)=line.strip().split(';')
try:
(dist, alt, name) = line
except ValueError:
return False
slopelist.add_cp(slopenum, float(dist), float(alt), name)
fid.close()
return status
def __open_cgx(filename, slopelist, slopenum):
"""Open a Cyclograph cgx file"""
fid = xml.dom.minidom.parse(filename)
slop = fid.getElementsByTagName("slope")[0]
slopename = slop.getElementsByTagName("name")[0]
if slopename.hasChildNodes():
slopelist.set_name(slopenum, slopename.childNodes[0].data)
slopestate = slop.getElementsByTagName("country")[0]
if slopestate.hasChildNodes():
slopelist.set_country(slopenum, slopestate.childNodes[0].data)
auth = slop.getElementsByTagName("author")[0]
author = auth.getElementsByTagName("name")[0]
if author.hasChildNodes():
slopelist.set_author(slopenum, author.childNodes[0].data)
mail = auth.getElementsByTagName("email")[0]
if mail.hasChildNodes():
slopelist.set_email(slopenum, mail.childNodes[0].data)
slopecomment = slop.getElementsByTagName("info")[0]
if slopecomment.hasChildNodes():
slopelist.set_comment(slopenum, slopecomment.childNodes[0].data)
for cpt in slop.getElementsByTagName('cp'):
try:
slopelist.add_cp(slopenum, float(cpt.attributes["dist"].value)
, float(cpt.attributes["alt"].value)
, cpt.getAttribute("desc"))
except Exception, err:
logging.exception(err)
fid.unlink()
return False
for coord in slop.getElementsByTagName('coord'):
try:
slopelist.add_coord(slopenum,
float(coord.attributes["lat"].value),
float(coord.attributes["lon"].value))
except Exception, err:
logging.exception(err)
fid.unlink()
return False
fid.unlink()
return True
def __open_xml(filename, slopelist, slopenum):
"""Open a Cyclomaniac xml file"""
fid = xml.dom.minidom.parse(filename)
slopename = fid.getElementsByTagName("name")[0]
slopename = slopename.childNodes
slopelist.set_name(slopenum, slopename[0].data)
samples = fid.getElementsByTagName("samples")[0]
for sample in samples.getElementsByTagName('sample'):
for ent in sample.childNodes:
if ent.localName == "distance":
dist = ent.childNodes[0].data.replace(',','.')
elif ent.localName == "height":
alt = ent.childNodes[0].data.replace(',','.')
elif ent.localName == "label":
name = ent.childNodes[0].data
slopelist.add_cp(slopenum, float(dist), float(alt), name)
name = u""
fid.unlink()
return True
def load_gpxfile(xmlfile):
"""Load a gpx file"""
try:
if isinstance(xmlfile, basestring) and xmlfile.strip().startswith('<'):
fid = xml.dom.minidom.parseString(xmlfile)
else:
fid = xml.dom.minidom.parse(xmlfile)
ptls = fid.getElementsByTagName('trkpt')
coords = [(el.attributes["lon"].value, el.attributes["lat"].value) for el in ptls]
cps = distance(coords)
next_cp = 0
max_dist = cps[-1][0]
indices = []
for i in range(len(cps)):
dist = cps[i][0]
if i == 0 or dist > next_cp or i == len(cps)-1:
indices.append(i)
next_cp = dist + max_dist/len(cps)
#Use waypoints to determine the name of a cp.
waypoints = {}
for waypoint in fid.getElementsByTagName('wpt'):
#find the nearest (filtered) point to this waypont
(wpt_lon, wpt_lat) = point_conversion(waypoint.attributes["lon"].value,
waypoint.attributes["lat"].value)
(min_i, min_distance) = (-1, float(3)) #use minimum accetable distance 3 km.
#print cps
for i in indices:
#calculate distance to point i
(lon, lat) = point_conversion(cps[i][1], cps[i][2])
dist = haversine(lat, wpt_lat, lon, wpt_lon)
#print (lon, lat, dist)
if dist < min_distance:
(min_i, min_distance) = (i, dist)
if min_i >= 0:
#is found a point near enought to the waypoint: use it.
waypoints[min_i] = waypoint.getElementsByTagName("name")[0].firstChild.data
returncp = []
is_with_alt = True
alt_count = 0
for i in indices:
#get elevation
(dist, lng, lat) = cps[i]
sample = ptls[i]
elelist = sample.getElementsByTagName('ele')
if len(elelist) > 0:
ele = elelist[0]
node = ele.childNodes
alt = float(node[0].data)
else:
is_with_alt = False
alt = 0
if (alt == 0):
alt_count += 1
if i in waypoints:
name = waypoints[i]
else:
name = u""
returncp.append((dist, alt, name, lat, lng))
fid.unlink()
retfile = SlopeFile(returncp)
if len(indices) == alt_count:
is_with_alt = False
retfile.hasAltitudes = is_with_alt
return retfile
except Exception, err:
logging.exception(err)
return None
def load_fitlogfile(xmlfile):
"""Load a fitlog file"""
try:
if isinstance(xmlfile, basestring) and xmlfile.strip().startswith('<'):
fid = xml.dom.minidom.parseString(xmlfile)
else:
fid = xml.dom.minidom.parse(xmlfile)
ptls = fid.getElementsByTagName('pt')
coords = [(el.attributes["lon"].value, el.attributes["lat"].value) for el in ptls]
cps = distance(coords)
next_cp = 0
max_dist = cps[-1][0]
indices = []
for i in range(len(cps)):
dist = cps[i][0]
if i == 0 or dist > next_cp or i == len(cps)-1:
indices.append(i)
next_cp = dist + max_dist/len(cps)
returncp = []
is_with_alt = True
alt_count = 0
name = u""
for i in indices:
#get elevation
(dist, lng, lat) = cps[i]
sample = ptls[i]
if sample.getAttribute('ele'):
elev = sample.attributes["ele"].value
if len(elev) > 0:
alt = float(elev)
else:
is_with_alt = False
alt = 0
else:
is_with_alt = False
alt = 0
if (alt == 0):
alt_count += 1
returncp.append((dist, alt, name, lat, lng))
fid.unlink()
retfile = SlopeFile(returncp)
if len(indices) == alt_count:
is_with_alt = False
retfile.hasAltitudes = is_with_alt
return retfile
except Exception, err:
logging.exception(err)
return None
def load_kmlfile(xmlfile):
"""Load a kml file"""
try:
if isinstance(xmlfile, basestring) and xmlfile.strip().startswith('<'):
fid = xml.dom.minidom.parseString(xmlfile)
else:
fid = xml.dom.minidom.parse(xmlfile)
coordlist = []
altlist = []
for linstr in fid.getElementsByTagName("LineString"):
coords = linstr.getElementsByTagName("coordinates")[0]
node = coords.childNodes[0]
data = node.data.strip(' \n')
coordlist += [el.split(',')[:2] for el in data.split(' ')]
#if LineString is not present try gx:coord (KML 2.2 ext)
if len(coordlist) == 0:
for gxcoord in fid.getElementsByTagName("gx:coord"):
node = gxcoord.childNodes[0]
temp = node.data.split(' ')
coordlist += [temp[:2]]
altlist += [float(temp[2])]
if len(coordlist) == 0:
return SlopeFile([])
cps = distance(coordlist)
next_cp = 0
max_dist = cps[-1][0]
is_with_alt = len(altlist) >= len(cps)
returncp = []
for i in range(len(cps)):
(dist, lng, lat) = cps[i]
#create self.num_cps check points
#print i
if i == 0 or dist > next_cp or i == len(cps)-1:
if is_with_alt:
# altitude is already in the kml file
alt = altlist[i]
else:
# altitude has to be downloaded
alt = 0
returncp.append((dist, alt, "", lat, lng))
next_cp = dist + max_dist/len(cps)
fid.unlink()
retfile = SlopeFile(returncp)
retfile.hasAltitudes = is_with_alt
return retfile
except Exception, err:
logging.exception(err)
return None
def load_tcxfile(xmlfile):
"""Load a tcx file"""
try:
fid = xml.dom.minidom.parse(xmlfile)
ptls = fid.getElementsByTagName('Trackpoint')
coords = []
is_with_alt = False
for sample in ptls:
for ent in sample.childNodes:
if ent.localName == "Position":
#Iterate on child nodes to get latitude and longitude
for pos_node in ent.childNodes:
if pos_node.localName == "LatitudeDegrees":
lat = pos_node.childNodes[0].data
elif pos_node.localName == "LongitudeDegrees":
lng = pos_node.childNodes[0].data
elif ent.localName == "AltitudeMeters":
alt = float(ent.childNodes[0].data)
if (alt != 0):
is_with_alt = True
coords.append((lng, lat, alt))
dist = 0.0
(lon_old, lat_old) = point_conversion(coords[0][0], coords[0][1])
returncp = []
for i in range(len(coords)):
(lon_new, lat_new) = point_conversion(coords[i][0], coords[i][1])
dist += haversine(lat_old, lat_new, lon_old, lon_new)
lon_old = lon_new
lat_old = lat_new
returncp.append((dist, coords[i][2], u"", coords[i][1], coords[i][0]))
retfile = SlopeFile(returncp)
logging.info("is with alt " + str(is_with_alt))
retfile.hasAltitudes = is_with_alt
return retfile
except Exception, err:
logging.exception(err)
return None
(UNSUPPORTED, CPS, AUTHOR, DATA) = range(4)
def __open_txt(file_, slopelist, slopenum):
"""Open a Cyclomaniac TXT file"""
if isinstance(file_, basestring):
fid = codecs.open(file_, encoding='utf-8', mode='r', errors='replace')
else:
fid = file_
#with open(filename, 'rb') as fid:
mode = CPS
for line in fid:
line = line.strip()
#Find if switching to a different mode.
if line.startswith('['):
modename = line.strip('[]').lower()
#print modename
if modename == 'author':
mode = AUTHOR
elif modename == 'data':
mode = DATA
else:
mode = UNSUPPORTED
continue
#mode cps import check point to slope.
if mode == CPS:
#format is dist, alt, name, other.
(dist, alt, name) = line.split(',')[:3]
(dist, alt) = (float(dist), float(alt))
name = name.strip('\"')
slopelist.add_cp(slopenum, dist, alt, name)
#mode data imports extra information about the slope
elif mode == DATA:
try:
(lhs, rhs) = line.split('=')[:2]
except:
continue
#print lhs +" <- " + rhs
if lhs == 'IDPercorso':
slopelist.set_name(slopenum, rhs)
elif lhs == 'Stato':
slopelist.set_country(slopenum, rhs)
elif lhs == 'Url':
slopelist.set_url(slopenum, rhs)
fid.close()
def __open_sal(filepathname, slopelist, slopenum):
"""Open a Salitaker SAL file"""
if isinstance(filepathname, basestring):
filename = os.path.split(filepathname)[-1]
name = filename.split('.')[0]
slopelist.set_name(slopenum, name)
fid = codecs.open(filepathname, encoding='utf-8', mode='r')
else:
fid = filepathname
#with open(filepathname, 'rb') as fid:
ncp = fid.readline().strip().split(' ')[4]
for _ in range(int(ncp)):
name = fid.readline().strip()
(dist, alt) = fid.readline().strip().split(' ')
slopelist.add_cp(slopenum, float(dist), float(alt), name)
fid.close()
def __open_crp(filepathname, slopelist, slopenum, num_cps=-1):
"""Open Ciclotour crp
The parameter num_cps is the number ok cp to import (at most).
Particular values are:
0: import every cp
-1: import the default number of cp"""
data = ""
if isinstance(filepathname, basestring):
fid = open(filepathname, mode='rb')#needed byte access not unicode string
else:
fid = filepathname
#with open(filepathname, 'rb') as fid:
byte = " "
while byte:
byte = fid.read(1)
data += byte
fid.close()
if not data:
#File not accesible or empty
return -1
if data[0] == '\x78' and data[1] == '\xda':
plaincsv = zlib.decompress(data)
elif data[0] == 'H' and data[1] == 'R':
plaincsv = data
else:
#Invalid file format
return -1
#print plaincsv
points = plaincsv.split('***')
line = points[0].split('\n') #plaincsv.split('\n')
#print line[0]
next_cp = 0
max_dist = float(line[-2].split('\t')[2])/100
lastline = len(line)-3
if num_cps < 0:
N = 20 #default value: often looks good.
elif num_cps == 0:
N = lastline
else:
N = num_cps
for i in range(lastline):
fields = line[i+2].split('\t')
#print fields
dist = float(fields[2])/100
#create N check points
if dist > next_cp or i == lastline or fields[8] != '':
alt = float(fields[3])
slopelist.add_cp(slopenum, dist, alt, unicode(fields[8], 'utf-8', errors='replace'))
next_cp = dist + max_dist/N
return True
### Function that return kml string from gpx
def gpxtokml(xmlfile):
"""Load a gpx file into kml"""
if isinstance(xmlfile, basestring) and xmlfile.strip().startswith('<'):
fid = xml.dom.minidom.parseString(xmlfile)
else:
fid = xml.dom.minidom.parse(xmlfile)
ptls = fid.getElementsByTagName('trkpt')
coords = [(el.attributes["lon"].value, el.attributes["lat"].value) for el in ptls]
kmlstring = "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n"
kmlstring += "<kml xmlns=\"http://earth.google.com/kml/2.0\" xmlns:atom=\"http://www.w3.org/2005/Atom\">\n"
kmlstring += "<Document>\n"
kmlstring += "<LineString><coordinates>"
for coord in coords:
(lon, lat) = coord
kmlstring += lon + "," + lat + " "
kmlstring += "</coordinates></LineString>\n"
kmlstring += "</Document>\n</kml>"
return kmlstring
### class for various formats
class SlopeFile:
def __init__(self, cps):
"""Load a track file"""
self.cps = cps
self.hasAltitudes = False
def max_dist(self):
""" Maximum distance of the track """
return self.cps[-1][0]
def __len__(self):
""" Number of points of the track """
return len(self.cps)
def newSlope(self, slopelist, slopenum, num, seltype=0):
""" Create a new slope in the slopelist"""
if seltype == 0:#using the given number of check points in num
max_dist = self.max_dist()
next_cp = 0.0
if num == -1:
N = 30
elif num == 0:
N = len(self.cps)
else:
N = num
for i in range(len(self.cps)):
(dist, alt, name, lat, lng)= self.cps[i]
slopelist.add_coord(slopenum, float(lat), float(lng))
#create approximately N check points
if i == 0 or dist > next_cp or i == len(self.cps)-1:
slopelist.add_cp(slopenum, dist, alt, name)
next_cp = dist + max_dist/N
return True
elif seltype == 1:#using the passed minimum distance in metres in num
next_dist = num
for i in range(len(self.cps)):
(dist, alt, name, lat, lng)= self.cps[i]
slopelist.add_coord(slopenum, float(lat), float(lng))
if i == 0 or dist > next_dist or i == len(self.cps)-1:
slopelist.add_cp(slopenum, dist, alt, name)
next_dist = dist + num
return True
else:
return False
def getCoords(self, slopelist, slopenum):
for i in range(len(self.cps)):
(dist, alt, name, lat, lng)= self.cps[i]
slopelist.add_coord(slopenum, float(lat), float(lng))
# vim:sw=4:softtabstop=4:expandtab
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