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#!/usr/bin/env python
#
# Copyright (C) 2009 Google Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
"""Data model classes for parsing and generating XML for the Maps Data API."""
__author__ = 'api.roman.public@google.com (Roman Nurik)'
import re
import atom.core
import gdata.data
MAP_ATOM_ID_PATTERN = re.compile('/maps/feeds/maps/'
'(?P<user_id>\w+)/'
'(?P<map_id>\w+)$')
FEATURE_ATOM_ID_PATTERN = re.compile('/maps/feeds/features/'
'(?P<user_id>\w+)/'
'(?P<map_id>\w+)/'
'(?P<feature_id>\w+)$')
# The KML mime type
KML_CONTENT_TYPE = 'application/vnd.google-earth.kml+xml'
# The OGC KML 2.2 namespace
KML_NAMESPACE = 'http://www.opengis.net/kml/2.2'
class MapsDataEntry(gdata.data.GDEntry):
"""Adds convenience methods inherited by all Maps Data entries."""
def get_user_id(self):
"""Extracts the user ID of this entry."""
if self.id.text:
match = self.__class__.atom_id_pattern.search(self.id.text)
if match:
return match.group('user_id')
return None
GetUserId = get_user_id
def get_map_id(self):
"""Extracts the map ID of this entry."""
if self.id.text:
match = self.__class__.atom_id_pattern.search(self.id.text)
if match:
return match.group('map_id')
return None
GetMapId = get_map_id
class Map(MapsDataEntry):
"""Represents a map which belongs to the user."""
atom_id_pattern = MAP_ATOM_ID_PATTERN
class MapFeed(gdata.data.GDFeed):
"""Represents an atom feed of maps."""
entry = [Map]
class KmlContent(atom.data.Content):
"""Represents an atom content element that encapsulates KML content."""
def __init__(self, **kwargs):
super(KmlContent, self).__init__(type=KML_CONTENT_TYPE, **kwargs)
if 'kml' in kwargs:
self.kml = kwargs['kml']
def _get_kml(self):
if self.children:
return self.children[0]
else:
return ''
def _set_kml(self, kml):
if not kml:
self.children = []
return
if type(kml) == str:
kml = atom.core.parse(kml)
if not kml.namespace:
kml.namespace = KML_NAMESPACE
self.children = [kml]
kml = property(_get_kml, _set_kml)
class Feature(MapsDataEntry):
"""Represents a single feature in a map."""
atom_id_pattern = FEATURE_ATOM_ID_PATTERN
content = KmlContent
def get_feature_id(self):
"""Extracts the feature ID of this feature."""
if self.id.text:
match = self.__class__.atom_id_pattern.search(self.id.text)
if match:
return match.group('feature_id')
return None
GetFeatureId = get_feature_id
class FeatureFeed(gdata.data.GDFeed):
"""Represents an atom feed of features."""
entry = [Feature]
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