author | Sverre Rabbelier <srabbelier@gmail.com> |
Wed, 08 Apr 2009 22:19:05 +0000 | |
changeset 2127 | 1a0167169af3 |
parent 109 | 620f9b141567 |
permissions | -rwxr-xr-x |
109
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#!/usr/bin/env python |
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# |
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# Copyright 2007 Google Inc. |
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# |
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# Licensed under the Apache License, Version 2.0 (the "License"); |
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# you may not use this file except in compliance with the License. |
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# You may obtain a copy of the License at |
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# |
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# http://www.apache.org/licenses/LICENSE-2.0 |
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# |
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# Unless required by applicable law or agreed to in writing, software |
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# distributed under the License is distributed on an "AS IS" BASIS, |
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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# See the License for the specific language governing permissions and |
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# limitations under the License. |
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# |
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"""Classes for common kinds, including Contact, Message, and Event. |
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Most of these kinds are based on the gd namespace "kinds" from GData: |
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http://code.google.com/apis/gdata/common-elements.html |
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""" |
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import types |
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import urlparse |
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from xml.sax import saxutils |
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from google.appengine.datastore import datastore_pb |
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from google.appengine.api import datastore |
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from google.appengine.api import datastore_errors |
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from google.appengine.api import datastore_types |
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class GdKind(datastore.Entity): |
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""" A base class for gd namespace kinds. |
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This class contains common logic for all gd namespace kinds. For example, |
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this class translates datastore (app id, kind, key) tuples to tag: |
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URIs appropriate for use in <key> tags. |
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""" |
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HEADER = u"""<entry xmlns:gd='http://schemas.google.com/g/2005'> |
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<category scheme='http://schemas.google.com/g/2005#kind' |
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term='http://schemas.google.com/g/2005#%s' />""" |
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FOOTER = u""" |
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</entry>""" |
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_kind_properties = set() |
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_contact_properties = set() |
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def __init__(self, kind, title, kind_properties, contact_properties=[]): |
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""" Ctor. |
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title is the name of this particular entity, e.g. Bob Jones or Mom's |
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Birthday Party. |
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kind_properties is a list of property names that should be included in |
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this entity's XML encoding as first-class XML elements, instead of |
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<property> elements. 'title' and 'content' are added to kind_properties |
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automatically, and may not appear in contact_properties. |
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contact_properties is a list of property names that are Keys that point to |
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Contact entities, and should be included in this entity's XML encoding as |
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<gd:who> elements. If a property name is included in both kind_properties |
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and contact_properties, it is treated as a Contact property. |
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Args: |
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kind: string |
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title: string |
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kind_properties: list of strings |
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contact_properties: list of string |
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""" |
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datastore.Entity.__init__(self, kind) |
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if not isinstance(title, types.StringTypes): |
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raise datastore_errors.BadValueError( |
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'Expected a string for title; received %s (a %s).' % |
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(title, datastore_types.typename(title))) |
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self['title'] = title |
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self['content'] = '' |
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self._contact_properties = set(contact_properties) |
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assert not self._contact_properties.intersection(self.keys()) |
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self._kind_properties = set(kind_properties) - self._contact_properties |
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self._kind_properties.add('title') |
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self._kind_properties.add('content') |
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def _KindPropertiesToXml(self): |
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""" Convert the properties that are part of this gd kind to XML. For |
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testability, the XML elements in the output are sorted alphabetically |
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by property name. |
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Returns: |
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string # the XML representation of the gd kind properties |
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""" |
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properties = self._kind_properties.intersection(set(self.keys())) |
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xml = u'' |
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for prop in sorted(properties): |
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prop_xml = saxutils.quoteattr(prop)[1:-1] |
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value = self[prop] |
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has_toxml = (hasattr(value, 'ToXml') or |
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isinstance(value, list) and hasattr(value[0], 'ToXml')) |
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for val in self._XmlEscapeValues(prop): |
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if has_toxml: |
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xml += '\n %s' % val |
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113 |
else: |
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114 |
xml += '\n <%s>%s</%s>' % (prop_xml, val, prop_xml) |
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115 |
|
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116 |
return xml |
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117 |
|
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118 |
|
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119 |
def _ContactPropertiesToXml(self): |
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120 |
""" Convert this kind's Contact properties kind to XML. For testability, |
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121 |
the XML elements in the output are sorted alphabetically by property name. |
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122 |
|
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123 |
Returns: |
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124 |
string # the XML representation of the Contact properties |
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125 |
""" |
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126 |
properties = self._contact_properties.intersection(set(self.keys())) |
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127 |
|
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128 |
xml = u'' |
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129 |
for prop in sorted(properties): |
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130 |
values = self[prop] |
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131 |
if not isinstance(values, list): |
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132 |
values = [values] |
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133 |
|
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134 |
for value in values: |
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135 |
assert isinstance(value, datastore_types.Key) |
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136 |
xml += """ |
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137 |
<gd:who rel="http://schemas.google.com/g/2005#%s.%s> |
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138 |
<gd:entryLink href="%s" /> |
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139 |
</gd:who>""" % (self.kind().lower(), prop, value.ToTagUri()) |
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140 |
|
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141 |
return xml |
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142 |
|
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143 |
|
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144 |
def _LeftoverPropertiesToXml(self): |
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145 |
""" Convert all of this entity's properties that *aren't* part of this gd |
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146 |
kind to XML. |
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147 |
|
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148 |
Returns: |
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149 |
string # the XML representation of the leftover properties |
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150 |
""" |
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151 |
leftovers = set(self.keys()) |
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152 |
leftovers -= self._kind_properties |
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153 |
leftovers -= self._contact_properties |
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154 |
if leftovers: |
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155 |
return u'\n ' + '\n '.join(self._PropertiesToXml(leftovers)) |
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156 |
else: |
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157 |
return u'' |
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158 |
|
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159 |
def ToXml(self): |
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160 |
""" Returns an XML representation of this entity, as a string. |
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161 |
""" |
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162 |
xml = GdKind.HEADER % self.kind().lower() |
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163 |
xml += self._KindPropertiesToXml() |
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164 |
xml += self._ContactPropertiesToXml() |
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165 |
xml += self._LeftoverPropertiesToXml() |
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166 |
xml += GdKind.FOOTER |
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167 |
return xml |
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168 |
|
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169 |
|
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170 |
class Message(GdKind): |
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171 |
"""A message, such as an email, a discussion group posting, or a comment. |
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172 |
|
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173 |
Includes the message title, contents, participants, and other properties. |
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|
174 |
|
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175 |
This is the gd Message kind. See: |
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176 |
http://code.google.com/apis/gdata/common-elements.html#gdMessageKind |
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177 |
|
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178 |
These properties are meaningful. They are all optional. |
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179 |
|
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180 |
property name property type meaning |
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181 |
------------------------------------- |
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182 |
title string message subject |
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|
183 |
content string message body |
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184 |
from Contact* sender |
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185 |
to Contact* primary recipient |
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|
186 |
cc Contact* CC recipient |
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|
187 |
bcc Contact* BCC recipient |
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|
188 |
reply-to Contact* intended recipient of replies |
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|
189 |
link Link* attachment |
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|
190 |
category Category* tag or label associated with this message |
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|
191 |
geoPt GeoPt* geographic location the message was posted from |
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|
192 |
rating Rating* message rating, as defined by the application |
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|
193 |
|
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|
194 |
* means this property may be repeated. |
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|
195 |
|
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|
196 |
The Contact properties should be Keys of Contact entities. They are |
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|
197 |
represented in the XML encoding as linked <gd:who> elements. |
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|
198 |
""" |
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|
199 |
KIND_PROPERTIES = ['title', 'content', 'link', 'category', 'geoPt', 'rating'] |
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|
200 |
CONTACT_PROPERTIES = ['from', 'to', 'cc', 'bcc', 'reply-to'] |
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|
201 |
|
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|
202 |
def __init__(self, title, kind='Message'): |
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|
203 |
GdKind.__init__(self, kind, title, Message.KIND_PROPERTIES, |
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|
204 |
Message.CONTACT_PROPERTIES) |
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|
205 |
|
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|
206 |
|
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|
207 |
class Event(GdKind): |
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|
208 |
"""A calendar event. |
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|
209 |
|
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|
210 |
Includes the event title, description, location, organizer, start and end |
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|
211 |
time, and other details. |
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|
212 |
|
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|
213 |
This is the gd Event kind. See: |
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|
214 |
http://code.google.com/apis/gdata/common-elements.html#gdEventKind |
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|
215 |
|
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|
216 |
These properties are meaningful. They are all optional. |
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|
217 |
|
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|
218 |
property name property type meaning |
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|
219 |
------------------------------------- |
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|
220 |
title string event name |
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|
221 |
content string event description |
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|
222 |
author string the organizer's name |
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|
223 |
where string* human-readable location (not a GeoPt) |
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|
224 |
startTime timestamp start time |
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|
225 |
endTime timestamp end time |
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|
226 |
eventStatus string one of the Event.Status values |
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|
227 |
link Link* page with more information |
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228 |
category Category* tag or label associated with this event |
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229 |
attendee Contact* attendees and other related people |
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230 |
|
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231 |
* means this property may be repeated. |
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232 |
|
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233 |
The Contact properties should be Keys of Contact entities. They are |
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234 |
represented in the XML encoding as linked <gd:who> elements. |
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235 |
""" |
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236 |
KIND_PROPERTIES = ['title', 'content', 'author', 'where', 'startTime', |
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237 |
'endTime', 'eventStatus', 'link', 'category'] |
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238 |
CONTACT_PROPERTIES = ['attendee'] |
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239 |
|
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240 |
class Status: |
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241 |
CONFIRMED = 'confirmed' |
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242 |
TENTATIVE = 'tentative' |
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243 |
CANCELED = 'canceled' |
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244 |
|
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245 |
def __init__(self, title, kind='Event'): |
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GdKind.__init__(self, kind, title, Event.KIND_PROPERTIES, |
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247 |
Event.CONTACT_PROPERTIES) |
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248 |
|
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249 |
def ToXml(self): |
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""" Override GdKind.ToXml() to special-case author, gd:where, gd:when, and |
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251 |
gd:eventStatus. |
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252 |
""" |
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xml = GdKind.HEADER % self.kind().lower() |
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254 |
|
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255 |
self._kind_properties = set(Contact.KIND_PROPERTIES) |
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256 |
xml += self._KindPropertiesToXml() |
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257 |
|
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258 |
if 'author' in self: |
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259 |
xml += """ |
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<author><name>%s</name></author>""" % self['author'] |
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|
261 |
|
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|
262 |
if 'eventStatus' in self: |
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|
263 |
xml += """ |
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|
264 |
<gd:eventStatus value="http://schemas.google.com/g/2005#event.%s" />""" % ( |
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|
265 |
self['eventStatus']) |
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|
266 |
|
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267 |
if 'where' in self: |
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|
268 |
lines = ['<gd:where valueString="%s" />' % val |
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|
269 |
for val in self._XmlEscapeValues('where')] |
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270 |
xml += '\n ' + '\n '.join(lines) |
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271 |
|
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|
272 |
iso_format = '%Y-%m-%dT%H:%M:%S' |
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|
273 |
xml += '\n <gd:when' |
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|
274 |
for key in ['startTime', 'endTime']: |
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275 |
if key in self: |
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|
276 |
xml += ' %s="%s"' % (key, self[key].isoformat()) |
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|
277 |
xml += ' />' |
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|
278 |
|
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|
279 |
self._kind_properties.update(['author', 'where', 'startTime', 'endTime', |
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|
280 |
'eventStatus']) |
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|
281 |
xml += self._ContactPropertiesToXml() |
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|
282 |
xml += self._LeftoverPropertiesToXml() |
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|
283 |
xml += GdKind.FOOTER |
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|
284 |
return xml |
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|
285 |
|
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|
286 |
|
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|
287 |
class Contact(GdKind): |
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|
288 |
"""A contact: a person, a venue such as a club or a restaurant, or an |
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|
289 |
organization. |
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|
290 |
|
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|
291 |
This is the gd Contact kind. See: |
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|
292 |
http://code.google.com/apis/gdata/common-elements.html#gdContactKind |
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|
293 |
|
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|
294 |
Most of the information about the contact is in the <gd:contactSection> |
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|
295 |
element; see the reference section for that element for details. |
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|
296 |
|
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|
297 |
These properties are meaningful. They are all optional. |
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|
298 |
|
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|
299 |
property name property type meaning |
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|
300 |
------------------------------------- |
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|
301 |
title string contact's name |
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|
302 |
content string notes |
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|
303 |
email Email* email address |
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|
304 |
geoPt GeoPt* geographic location |
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|
305 |
im IM* IM address |
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|
306 |
phoneNumber Phonenumber* phone number |
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|
307 |
postalAddress PostalAddress* mailing address |
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|
308 |
link Link* link to more information |
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|
309 |
category Category* tag or label associated with this contact |
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|
310 |
|
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|
311 |
* means this property may be repeated. |
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|
312 |
""" |
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|
313 |
CONTACT_SECTION_HEADER = """ |
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|
314 |
<gd:contactSection>""" |
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|
315 |
CONTACT_SECTION_FOOTER = """ |
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|
316 |
</gd:contactSection>""" |
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|
317 |
|
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|
318 |
KIND_PROPERTIES = ['title', 'content', 'link', 'category'] |
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|
319 |
|
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|
320 |
CONTACT_SECTION_PROPERTIES = ['email', 'geoPt', 'im', 'phoneNumber', |
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|
321 |
'postalAddress'] |
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|
322 |
|
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|
323 |
def __init__(self, title, kind='Contact'): |
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|
324 |
GdKind.__init__(self, kind, title, Contact.KIND_PROPERTIES) |
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|
325 |
|
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|
326 |
def ToXml(self): |
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|
327 |
""" Override GdKind.ToXml() to put some properties inside a |
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|
328 |
gd:contactSection. |
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|
329 |
""" |
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|
330 |
xml = GdKind.HEADER % self.kind().lower() |
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|
331 |
|
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|
332 |
self._kind_properties = set(Contact.KIND_PROPERTIES) |
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parents:
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|
333 |
xml += self._KindPropertiesToXml() |
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|
334 |
|
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|
335 |
xml += Contact.CONTACT_SECTION_HEADER |
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|
336 |
self._kind_properties = set(Contact.CONTACT_SECTION_PROPERTIES) |
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|
337 |
xml += self._KindPropertiesToXml() |
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parents:
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|
338 |
xml += Contact.CONTACT_SECTION_FOOTER |
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|
339 |
|
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|
340 |
self._kind_properties.update(Contact.KIND_PROPERTIES) |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
341 |
xml += self._LeftoverPropertiesToXml() |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
342 |
xml += GdKind.FOOTER |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
343 |
return xml |