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annotate src/plugins/plugin_exp_pubsub_schema.py @ 2386:2e05921df16a

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plugin schema, core(xmlui): deep copy base form when reused to avoid accidental modification
author Goffi <goffi@goffi.org>
date Fri, 20 Oct 2017 08:39:05 +0200
parents 72c30e73a9a5
children 4c883d1c3e81
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1 #!/usr/bin/env python2
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2 # -*- coding: utf-8 -*-
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3
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4 # SAT plugin for Pubsub Schemas
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5 # Copyright (C) 2009-2017 Jérôme Poisson (goffi@goffi.org)
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6
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7 # This program is free software: you can redistribute it and/or modify
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8 # it under the terms of the GNU Affero General Public License as published by
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9 # the Free Software Foundation, either version 3 of the License, or
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10 # (at your option) any later version.
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11
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12 # This program is distributed in the hope that it will be useful,
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13 # but WITHOUT ANY WARRANTY; without even the implied warranty of
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14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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15 # GNU Affero General Public License for more details.
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16
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17 # You should have received a copy of the GNU Affero General Public License
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18 # along with this program. If not, see <http://www.gnu.org/licenses/>.
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19
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20 from sat.core.i18n import _
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21 from sat.core import exceptions
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22 from sat.core.constants import Const as C
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23 from sat.tools import xml_tools
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24 from twisted.words.protocols.jabber import jid
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25 from twisted.words.protocols.jabber.xmlstream import XMPPHandler
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26 from twisted.internet import defer
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27 from sat.core.log import getLogger
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28 log = getLogger(__name__)
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29 from wokkel import disco, iwokkel
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30 from wokkel import data_form
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31 from wokkel import generic
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32 from zope.interface import implements
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33 from collections import Iterable
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34 import copy
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35
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36 NS_SCHEMA = 'https://salut-a-toi/protocol/schema:0'
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37 NS_SCHEMA_FORM = 'https://salut-a-toi/protocol/schema#schema:0'
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38
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39 PLUGIN_INFO = {
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40 C.PI_NAME: "PubSub Schema",
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41 C.PI_IMPORT_NAME: "PUBSUB_SCHEMA",
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42 C.PI_TYPE: "EXP",
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43 C.PI_PROTOCOLS: [],
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44 C.PI_DEPENDENCIES: ["XEP-0060"],
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45 C.PI_MAIN: "PubsubSchema",
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46 C.PI_HANDLER: "yes",
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47 C.PI_DESCRIPTION: _("""Handle Pubsub data schemas""")
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48 }
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49
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51 class PubsubSchema(object):
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52
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53 def __init__(self, host):
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54 log.info(_(u"PubSub Schema initialization"))
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55 self.host = host
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56 self._p = self.host.plugins["XEP-0060"]
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57 host.bridge.addMethod("psSchemaGet", ".plugin",
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58 in_sign='sss', out_sign='s',
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59 method=self._getSchema,
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60 async=True
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61 )
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62 host.bridge.addMethod("psSchemaSet", ".plugin",
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63 in_sign='ssss', out_sign='',
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64 method=self._setSchema,
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65 async=True
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66 )
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67 host.bridge.addMethod("psSchemaUIGet", ".plugin",
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68 in_sign='sss', out_sign='s',
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69 method=self._getUISchema,
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70 async=True
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71 )
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72 host.bridge.addMethod("psItemsFormGet", ".plugin",
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73 in_sign='ssssiassa{ss}s', out_sign='(asa{ss})',
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74 method=self._getDataFormItems,
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75 async=True)
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76 host.bridge.addMethod("psItemFormSend", ".plugin",
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77 in_sign='ssa{sas}ssa{ss}s', out_sign='s',
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78 method=self._sendDataFormItem,
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79 async=True)
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80
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81 def getHandler(self, client):
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82 return SchemaHandler()
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83
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84 def _getSchemaBridgeCb(self, schema_elt):
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85 if schema_elt is None:
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86 return u''
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87 return schema_elt.toXml()
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88
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89 def _getSchema(self, service, nodeIdentifier, profile_key=C.PROF_KEY_NONE):
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90 client = self.host.getClient(profile_key)
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91 service = None if not service else jid.JID(service)
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92 d = self.getSchema(client, service, nodeIdentifier)
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93 d.addCallback(self._getSchemaBridgeCb)
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94 return d
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95
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96 def _getSchemaCb(self, iq_elt):
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97 try:
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98 schema_elt = next(iq_elt.elements(NS_SCHEMA, 'schema'))
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99 except StopIteration:
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100 raise exceptions.DataError('missing <schema> element')
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101 schema_form = data_form.findForm(schema_elt, NS_SCHEMA_FORM)
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102 if schema_form is None:
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103 # there is not schema on this node
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104 return None
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105 # we get again the form because we need all elements/namespaces
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106 # while schema_form.toElement while only keep XEP-0004 elements
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107 x_elt = next(schema_elt.elements(data_form.NS_X_DATA, 'x'))
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108 return x_elt
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109
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110 def getSchema(self, client, service, nodeIdentifier):
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111 """retrieve PubSub node schema
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112
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113 @param service(jid.JID, None): jid of PubSub service
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114 None to use our PEP
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115 @param nodeIdentifier(unicode): node to get schema from
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116 @return (domish.Element, None): schema (<x> element)
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117 None if not schema has been set on this node
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118 """
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119 iq_elt = client.IQ(u'get')
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120 if service is not None:
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121 iq_elt['to'] = service.full()
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122 pubsub_elt = iq_elt.addElement((NS_SCHEMA, 'pubsub'))
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123 schema_elt = pubsub_elt.addElement((NS_SCHEMA, 'schema'))
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124 schema_elt['node'] = nodeIdentifier
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125 d = iq_elt.send()
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126 d.addCallback(self._getSchemaCb)
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127 return d
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128
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129 @defer.inlineCallbacks
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130 def getSchemaForm(self, client, service, nodeIdentifier, schema=None, form_type='form', copy_form=True):
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131 """get data form from node's schema
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132
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133 @param service(None, jid.JID): PubSub service
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134 @param nodeIdentifier(unicode): node
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135 @param schema(domish.Element, data_form.Form, None): node schema
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136 if domish.Element, will be converted to data form
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137 if data_form.Form it will be returned without modification
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138 if None, it will be retrieved from node (imply one additional XMPP request)
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139 @param form_type(unicode): type of the form
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140 @param copy_form(bool): if True and if schema is already a data_form.Form, will deep copy it before returning
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141 needed when the form is reused and it will be modified (e.g. in sendDataFormItem)
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142 @return(data_form.Form): data form
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143 the form should not be modified if copy_form is not set
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144 """
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145 if schema is None:
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146 log.debug(_(u"unspecified schema, we need to request it"))
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147 schema = yield self.getSchema(client, service, nodeIdentifier)
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148 if schema is None:
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149 raise exceptions.DataError(_(u"no schema specified, and this node has no schema either, we can't construct the data form"))
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150 elif isinstance(schema, data_form.Form):
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151 if copy_form:
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152 schema = copy.deepcopy(schema)
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153 defer.returnValue(schema)
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154
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155 try:
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156 form = data_form.Form.fromElement(schema)
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157 except data_form.Error as e:
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158 raise exceptions.DataError(_(u"Invalid Schema: {msg}").format(
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159 msg = e))
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160 form.formType = form_type
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161 defer.returnValue(form)
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162
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163 def schema2XMLUI(self, schema_elt):
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164 form = data_form.Form.fromElement(schema_elt)
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165 xmlui = xml_tools.dataForm2XMLUI(form, '')
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166 return xmlui
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167
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168 def _getUISchema(self, service, nodeIdentifier, profile_key=C.PROF_KEY_NONE):
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169 client = self.host.getClient(profile_key)
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170 service = None if not service else jid.JID(service)
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171 d = self.getUISchema(client, service, nodeIdentifier)
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172 d.addCallback(lambda xmlui: xmlui.toXml())
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173 return d
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174
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175 def getUISchema(self, client, service, nodeIdentifier):
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176 d = self.getSchema(client, service, nodeIdentifier)
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177 d.addCallback(self.schema2XMLUI)
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178 return d
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179
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180 def _setSchema(self, service, nodeIdentifier, schema, profile_key=C.PROF_KEY_NONE):
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181 client = self.host.getClient(profile_key)
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182 service = None if not service else jid.JID(service)
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183 schema = generic.parseXml(schema.encode('utf-8'))
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184 return self.setSchema(client, service, nodeIdentifier, schema)
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185
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186 def setSchema(self, client, service, nodeIdentifier, schema):
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187 """set or replace PubSub node schema
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188
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189 @param schema(domish.Element, None): schema to set
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190 None if schema need to be removed
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191 """
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parents:
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192 iq_elt = client.IQ()
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193 if service is not None:
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194 iq_elt['to'] = service.full()
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195 pubsub_elt = iq_elt.addElement((NS_SCHEMA, 'pubsub'))
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196 schema_elt = pubsub_elt.addElement((NS_SCHEMA, 'schema'))
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197 schema_elt['node'] = nodeIdentifier
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198 if schema is not None:
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199 schema_elt.addChild(schema)
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200 return iq_elt.send()
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201
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202 def _getDataFormItems(self, form_ns='', service='', node='', schema='', max_items=10, item_ids=None, sub_id=None, extra_dict=None, profile_key=C.PROF_KEY_NONE):
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203 client = self.host.getClient(profile_key)
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204 service = jid.JID(service) if service else None
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205 if schema:
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206 schema = generic.parseXml(schema.encode('utf-8'))
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207 else:
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208 schema = None
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209 max_items = None if max_items == C.NO_LIMIT else max_items
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210 extra = self._p.parseExtra(extra_dict)
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211 d = self.getDataFormItems(client, form_ns or None, service, node or None, schema, max_items or None, item_ids, sub_id or None, extra.rsm_request, extra.extra)
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212 d.addCallback(self._p.serItemsData)
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213 return d
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214
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215 @defer.inlineCallbacks
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216 def getDataFormItems(self, client, form_ns, service, nodeIdentifier, schema=None, max_items=None, item_ids=None, sub_id=None, rsm_request=None, extra=None):
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217 """Get items known as being data forms, and convert them to XMLUI
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218
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219 @param form_ns (unicode, None): namespace of the form
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220 None to accept everything, even if form has no namespace
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221 @param schema(domish.Element, data_form.Form, None): schema of the node if known
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222 if None, it will be retrieved from node
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223 other parameters as the same as for [getItems]
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224 @return (list[unicode]): XMLUI of the forms
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225 if an item is invalid (not corresponding to form_ns or not a data_form)
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226 it will be skipped
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227 """
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228 # we need the initial form to get options of fields when suitable
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229 schema_form = yield self.getSchemaForm(client, service, nodeIdentifier, schema, form_type='result', copy_form=False)
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diff changeset
230 items_data = yield self._p.getItems(client, service, nodeIdentifier, max_items, item_ids, sub_id, rsm_request, extra)
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diff changeset
231 items, metadata = items_data
41c7717b52cd plugin PubSub Schema: schema helper methods:
Goffi <goffi@goffi.org>
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diff changeset
232 items_xmlui = []
41c7717b52cd plugin PubSub Schema: schema helper methods:
Goffi <goffi@goffi.org>
parents: 2350
diff changeset
233 for item_elt in items:
41c7717b52cd plugin PubSub Schema: schema helper methods:
Goffi <goffi@goffi.org>
parents: 2350
diff changeset
234 for x_elt in item_elt.elements((data_form.NS_X_DATA, u'x')):
41c7717b52cd plugin PubSub Schema: schema helper methods:
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diff changeset
235 form = data_form.Form.fromElement(x_elt)
41c7717b52cd plugin PubSub Schema: schema helper methods:
Goffi <goffi@goffi.org>
parents: 2350
diff changeset
236 if form_ns and form.formNamespace != form_ns:
41c7717b52cd plugin PubSub Schema: schema helper methods:
Goffi <goffi@goffi.org>
parents: 2350
diff changeset
237 continue
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72c30e73a9a5 plugin schema: use new "prepend" argument to put "id" widget first.
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diff changeset
238 xmlui = xml_tools.dataFormResult2XMLUI(
72c30e73a9a5 plugin schema: use new "prepend" argument to put "id" widget first.
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parents: 2378
diff changeset
239 form,
72c30e73a9a5 plugin schema: use new "prepend" argument to put "id" widget first.
Goffi <goffi@goffi.org>
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diff changeset
240 schema_form,
72c30e73a9a5 plugin schema: use new "prepend" argument to put "id" widget first.
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diff changeset
241 prepend = (('label', 'id'),('text', item_elt['id'], u'id'))
72c30e73a9a5 plugin schema: use new "prepend" argument to put "id" widget first.
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parents: 2378
diff changeset
242 )
2363
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diff changeset
243 items_xmlui.append(xmlui)
41c7717b52cd plugin PubSub Schema: schema helper methods:
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diff changeset
244 break
41c7717b52cd plugin PubSub Schema: schema helper methods:
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parents: 2350
diff changeset
245 defer.returnValue((items_xmlui, metadata))
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246
41c7717b52cd plugin PubSub Schema: schema helper methods:
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diff changeset
247
41c7717b52cd plugin PubSub Schema: schema helper methods:
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diff changeset
248 def _sendDataFormItem(self, service, nodeIdentifier, values, schema=None, item_id=None, extra=None, profile_key=C.PROF_KEY_NONE):
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249 client = self.host.getClient(profile_key)
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250 service = None if not service else jid.JID(service)
41c7717b52cd plugin PubSub Schema: schema helper methods:
Goffi <goffi@goffi.org>
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diff changeset
251 if schema:
41c7717b52cd plugin PubSub Schema: schema helper methods:
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252 schema = generic.parseXml(schema.encode('utf-8'))
41c7717b52cd plugin PubSub Schema: schema helper methods:
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diff changeset
253 else:
41c7717b52cd plugin PubSub Schema: schema helper methods:
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diff changeset
254 schema = None
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diff changeset
255 d = self.sendDataFormItem(client, service, nodeIdentifier, values, schema, item_id or None, extra, deserialise=True)
2363
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diff changeset
256 d.addCallback(lambda ret: ret or u'')
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diff changeset
257 return d
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258
41c7717b52cd plugin PubSub Schema: schema helper methods:
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diff changeset
259 @defer.inlineCallbacks
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diff changeset
260 def sendDataFormItem(self, client, service, nodeIdentifier, values, schema=None, item_id=None, extra=None, deserialise=False):
2363
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diff changeset
261 """Publish an item as a dataform when we know that there is a schema
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diff changeset
262
2371
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diff changeset
263 @param values(dict[[iterable[object], object]): values set for the form
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diff changeset
264 if not iterable, will be put in a list
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diff changeset
265 @param schema(domish.Element, data_form.Form, None): data schema
2363
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266 None to retrieve data schema from node (need to do a additional XMPP call)
2371
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diff changeset
267 Schema is needed to construct data form to publish
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diff changeset
268 @param deserialise(bool): if True, data are list of unicode and must be deserialized according to expected type
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parents: 2363
diff changeset
269 This is done in this method and not directly in _sendDataFormItem because we need to know the data type
2268df8c99bf plugin pubsub schema: values handling:
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parents: 2363
diff changeset
270 which is in the form, not availablable in _sendDataFormItem
2363
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parents: 2350
diff changeset
271 other parameters as the same as for [self._p.sendItem]
41c7717b52cd plugin PubSub Schema: schema helper methods:
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272 """
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273 form = yield self.getSchemaForm(client, service, nodeIdentifier, schema, form_type='submit')
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274
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275 for name, values_list in values.iteritems():
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276 try:
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277 field = form.fields[name]
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278 except KeyError:
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279 log.warning(_(u"field {name} doesn't exist, ignoring it").format(name=name))
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280 continue
2371
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281 if isinstance(values_list, basestring) or not isinstance(values_list, Iterable):
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282 values_list = [values_list]
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283 if deserialise:
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284 if field.fieldType == 'boolean':
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285 values_list = [C.bool(v) for v in values_list]
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286 elif 'jid' in field.fieldType:
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287 values_list = [jid.JID(v) for v in values_list]
2363
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288 field.values = values_list
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289
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290 yield self._p.sendItem(client, service, nodeIdentifier, form.toElement(), item_id, extra)
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291
2350
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292
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293 class SchemaHandler(XMPPHandler):
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294 implements(iwokkel.IDisco)
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295
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296 def getDiscoInfo(self, requestor, service, nodeIdentifier=''):
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297 return [disco.DiscoFeature(NS_SCHEMA)]
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298
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299 def getDiscoItems(self, requestor, service, nodeIdentifier=''):
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300 return []