"""This module contains winterrodeln specific functions that are prcocessing the MediaWiki markup.
"""
import re
+import xml.etree.ElementTree
import formencode
import wrpylib.wrvalidators
import wrpylib.mwmarkup
+WRMAP_POINT_TYPES = ['gasthaus', 'haltestelle', 'parkplatz', 'achtung', 'punkt']
+WRMAP_LINE_TYPES = ['rodelbahn', 'gehweg', 'alternative', 'lift', 'anfahrt', 'linie']
+
+
+class ParseError(RuntimeError):
+ """Exception used by some of the functions"""
+ pass
+
def _conv(fnct, value, fieldname):
"""Internal function.
result = (start, end) + result[2:]
return results
+
+def googlemap_to_wrmap(center, zoom, coords, paths):
+ """Converts the output of parse_googlemap to the GeoJSON format wrmap uses.
+ :returns: (GeoJSON as nested Python datatypes)
+ """
+ json_features = []
+
+ # point
+ for point in coords:
+ lon, lat, symbol, title = point
+ properties = {'type': 'punkt' if symbol is None else symbol.lower()}
+ if title is not None: properties['name'] = title
+ json_features.append({
+ 'type': 'Feature',
+ 'geometry': {'type': 'Point', 'coordinates': [lon, lat]},
+ 'properties': properties})
+
+ # path
+ for path in paths:
+ style, entries = path
+ style = style.lower()
+ PATH_TYPES = {u'6#ff014e9a': u'rodelbahn', u'6#ffe98401': u'gehweg', u'6#ff7f7fff': u'alternative', u'3#ff000000': u'lift', u'3#ffe1e100': u'anfahrt'}
+ if PATH_TYPES.has_key(style):
+ properties = {'type': PATH_TYPES[style]}
+ else:
+ properties = {'type': 'line'}
+ properties['dicke'] = style[0]
+ properties['farbe'] = style[4:]
+ json_features.append({
+ 'type': 'Feature',
+ 'geometry': {
+ 'type': 'LineString',
+ 'coordinates': [[lon, lat] for lon, lat, symbol, title in entries]},
+ 'properties': properties})
+
+ geojson = {
+ 'type': 'FeatureCollection',
+ 'features': json_features,
+ 'properties': {'lon': center[0], 'lat': center[1], 'zoom': zoom}}
+ return geojson
+
+
+def parse_wrmap_coordinates(coords):
+ '''gets a string coordinates and returns an array of lon/lat coordinate pairs, e.g.
+ 47.12 N 11.87 E
+ 47.13 N 11.70 E
+ ->
+ [[11.87, 47.12], [11.70, 47.13]]'''
+ result = []
+ pos = 0
+ for match in re.finditer(r'\s*(\d+\.?\d*)\s*N?\s+(\d+\.?\d*)\s*E?\s*', coords):
+ if match.start() != pos:
+ break
+ result.append([float(match.groups()[1]), float(match.groups()[0])])
+ pos = match.end()
+ else:
+ if pos == len(coords):
+ return result
+ raise RuntimeError('Wrong coordinate format: {}'.format(coords))
+
+
+def parse_wrmap(wikitext):
+ """Parses the (unicode) u'<wrmap ...>content</wrmap>' of the Winterrodeln wrmap extension.
+ If wikitext does not contain the <wrmap> tag or if the <wrmap> tag contains
+ invalid formatted lines, a ParseError is raised.
+ Use wrpylib.mwmarkup.find_tag(wikitext, 'wrmap') to find the wrmap tag within an arbitrary
+ wikitext before using this function.
+
+ :param wikitext: wikitext containing only the template. Example:
+
+ wikitext = u'''
+ <wrmap lat="47.2417134" lon="11.21408895" zoom="14" width="700" height="400">
+ <gasthaus name="Rosskogelhütte" wiki="Rosskogelhütte">47.240689 11.190454</gasthaus>
+ <parkplatz>47.245789 11.238971</parkplatz>
+ <haltestelle name="Oberperfuss Rangger Köpfl Lift">47.245711 11.238283</haltestelle>
+ <rodelbahn>
+ 47.238587 11.203360
+ 47.244951 11.230868
+ 47.245470 11.237853
+ </rodelbahn>
+ </wrmap>
+ '''
+ :returns: GeoJSON as nested Python datatype
+ """
+ # parse XML
+ try:
+ wrmap_xml = xml.etree.ElementTree.fromstring(wikitext.encode('utf-8'))
+ except xml.etree.ElementTree.ParseError as e:
+ row, column = e.position
+ raise ParseError("XML parse error on row {}, column {}: {}".format(row, column, e))
+ if wrmap_xml.tag not in ['wrmap', 'wrgmap']:
+ raise ParseError('No valid tag name')
+
+ # convert XML to geojson (http://www.geojson.org/geojson-spec.html)
+ json_features = []
+ for feature in wrmap_xml:
+ # determine feature type
+ is_point = feature.tag in WRMAP_POINT_TYPES
+ is_line = feature.tag in WRMAP_LINE_TYPES
+ if (not is_point and not is_line):
+ raise ParseError('Unknown element <{}>.'.format(feature.tag))
+
+ # point
+ if is_point:
+ properties = {'type': feature.tag}
+ allowed_properties = set(['name', 'wiki'])
+ wrong_properties = set(feature.attrib.keys()) - allowed_properties
+ if len(wrong_properties) > 0:
+ raise ParseError("The attribute '{}' is not allowed at <{}>.".format(list(wrong_properties)[0], feature.tag))
+ properties.update(feature.attrib)
+ coordinates = parse_wrmap_coordinates(feature.text)
+ if len(coordinates) != 1:
+ raise ParseError('The element <{}> has to have exactly one coordinate pair.'.format(feature.tag))
+ json_features.append({
+ 'type': 'Feature',
+ 'geometry': {'type': 'Point', 'coordinates': coordinates[0]},
+ 'properties': properties})
+
+ # line
+ if is_line:
+ properties = {'type': feature.tag}
+ allowed_properties = set(['farbe', 'dicke'])
+ wrong_properties = set(feature.attrib.keys()) - allowed_properties
+ if len(wrong_properties) > 0:
+ raise ParseError("The attribute '{}' is not allowed at <{}>.".format(list(wrong_properties)[0], feature.tag))
+ if feature.attrib.has_key('farbe'):
+ if not re.match('#[0-9a-fA-F]{6}$', feature.attrib['farbe']):
+ raise ParseError('The attribute "farbe" has to have a format like "#a0bb43".')
+ properties['strokeColor'] = feature.attrib['farbe'] # e.g. #a200b7
+ if feature.attrib.has_key('dicke'):
+ try:
+ properties['strokeWidth'] = int(feature.attrib['dicke']) # e.g. 6
+ except ValueError:
+ raise ParseError('The attribute "dicke" has to be an integer.')
+ json_features.append({
+ 'type': 'Feature',
+ 'geometry': {'type': 'LineString', 'coordinates': parse_wrmap_coordinates(feature.text)},
+ 'properties': properties})
+
+ # attributes
+ properties = {}
+ for k, v in wrmap_xml.attrib.iteritems():
+ if k in ['lat', 'lon']:
+ try:
+ properties[k] = float(v)
+ except ValueError:
+ raise ParseError('Attribute "{}" has to be a float value.'.format(k))
+ elif k in ['zoom', 'width', 'height']:
+ try:
+ properties[k] = int(v)
+ except ValueError:
+ raise ParseError('Attribute "{}" has to be an integer value.'.format(k))
+ else:
+ raise ParseError('Unknown attribute "{}".'.format(k))
+
+ geojson = {
+ 'type': 'FeatureCollection',
+ 'features': json_features,
+ 'properties': properties}
+
+ return geojson
+
+
+def create_wrmap_coordinates(coords):
+ result = []
+ for coord in coords:
+ result.append('{:.6f} N {:.6f} E'.format(coord[1], coord[0]))
+ return '\n'.join(result)
+
+
+def create_wrmap(geojson):
+ """Creates a <wrmap> wikitext from geojson (as python types)."""
+ wrmap_xml = xml.etree.ElementTree.Element('wrmap')
+ wrmap_xml.text = '\n\n'
+ for k, v in geojson['properties'].iteritems():
+ wrmap_xml.attrib[k] = str(v)
+
+ assert geojson['type'] == 'FeatureCollection'
+ json_features = geojson['features']
+ last_json_feature = None
+ for json_feature in json_features:
+ feature_xml = xml.etree.ElementTree.SubElement(wrmap_xml, json_feature['properties']['type'])
+ geo = json_feature['geometry']
+ if geo['type'] == 'Point':
+ feature_xml.text = create_wrmap_coordinates([geo['coordinates']])
+ if last_json_feature is not None:
+ last_json_feature.tail = '\n'
+ else:
+ if last_json_feature is not None:
+ last_json_feature.tail = '\n\n'
+ feature_xml.text = '\n' + create_wrmap_coordinates(geo['coordinates']) + '\n'
+ last_json_feature = feature_xml
+ feature_xml.attrib = json_feature['properties']
+ del feature_xml.attrib['type']
+
+ if last_json_feature is not None:
+ last_json_feature.tail = '\n\n'
+ return xml.etree.ElementTree.tostring(wrmap_xml, encoding='utf-8').decode('utf-8')
+
ToastFreeware / philipp / winterrodeln / wrpylib.git / blobdiff