Mercurial > libervia-backend

annotate src/plugins/plugin_xep_0020.py @ 1316:8adcdf2cdfe1 frontends_multi_profiles

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core: added a "profileConnecting" method check: if a plugin has a profileConnecting method, it will be called when the profile is being connected but before the client stream is started. That can be usefull if things need to be done before the communication is started: e.g. putting triggers, loading PersistentDict, etc.
author Goffi <goffi@goffi.org>
date Mon, 09 Feb 2015 21:39:51 +0100
parents 301b342c697a
children 069ad98b360d
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1 #!/usr/bin/python
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2 # -*- coding: utf-8 -*-
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3
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4 # SAT plugin for managing xep-0020
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5 # Copyright (C) 2009, 2010, 2011, 2012, 2013, 2014 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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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.log import getLogger
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22 log = getLogger(__name__)
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23 from twisted.words.protocols.jabber import client, jid
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24 from twisted.words.xish import domish
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25
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26 from zope.interface import implements
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27
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28 try:
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29 from twisted.words.protocols.xmlstream import XMPPHandler
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30 except ImportError:
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31 from wokkel.subprotocols import XMPPHandler
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32
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33 from wokkel import disco, iwokkel, data_form
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34
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35 NS_FEATURE_NEG = 'http://jabber.org/protocol/feature-neg'
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36
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37 PLUGIN_INFO = {
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38 "name": "XEP 0020 Plugin",
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39 "import_name": "XEP-0020",
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40 "type": "XEP",
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41 "protocols": ["XEP-0020"],
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42 "main": "XEP_0020",
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43 "handler": "yes",
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44 "description": _("""Implementation of Feature Negotiation""")
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45 }
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47
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48 class XEP_0020(object):
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49
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50 def __init__(self, host):
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51 log.info(_("Plugin XEP_0020 initialization"))
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52
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53 def getHandler(self, profile):
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54 return XEP_0020_handler()
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55
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56 def getFeatureElt(self, elt):
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57 """Check element's children to find feature elements
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58 @param elt: domish.Element
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59 @return: feature elements"""
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60 return [child for child in elt.elements() if child.name == 'feature']
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61
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62 def getChoosedOptions(self, elt):
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63 """Return choosed feature for feature element
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64 @param elt: feature domish element
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65 @return: dict with feature name as key, and choosed option as value"""
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66 form = data_form.Form.fromElement(elt.firstChildElement())
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67 result = {}
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68 for field in form.fields:
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69 values = form.fields[field].values
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70 result[field] = values[0] if values else None
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71 if len(values) > 1:
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72 log.warning(_("More than one value choosed for %s, keeping the first one") % field)
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73 return result
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74
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75 def negociate(self, feature_elt, form_type, negociable_values):
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76 """Negociate the feature options
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77 @param feature_elt: feature domish element
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78 @param form_type: the option to negociate
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79 @param negociable_values: acceptable values for this negociation"""
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80 form = data_form.Form.fromElement(feature_elt.firstChildElement())
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81 options = [option.value for option in form.fields[form_type].options]
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82 for value in negociable_values:
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83 if value in options:
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84 return value
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85 return None
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86
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87 def chooseOption(self, options_dict):
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88 """Build a feature element with choosed options
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89 @param options_dict: dict with feature as key and choosed option as value"""
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90 feature_elt = domish.Element((NS_FEATURE_NEG, 'feature'))
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91 x_form = data_form.Form('submit')
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92 x_form.makeFields(options_dict)
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93 feature_elt.addChild(x_form.toElement())
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94 return feature_elt
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95
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96 def proposeFeatures(self, options_dict, namespace=None):
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97 """Build a feature element with options to propose
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98 @param options_dict: dict with feature as key and list of acceptable options as value
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99 @param namespace: feature namespace"""
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100 feature_elt = domish.Element((NS_FEATURE_NEG, 'feature'))
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101 x_form = data_form.Form('form', formNamespace=namespace)
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102 for field in options_dict:
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103 x_form.addField(data_form.Field('list-single', field,
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104 options=[data_form.Option(_option) for _option in options_dict[field]]))
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105 feature_elt.addChild(x_form.toElement())
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106 return feature_elt
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107
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108
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109 class XEP_0020_handler(XMPPHandler):
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110 implements(iwokkel.IDisco)
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111
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112 def getDiscoInfo(self, requestor, target, nodeIdentifier=''):
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113 return [disco.DiscoFeature(NS_FEATURE_NEG)]
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114
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115 def getDiscoItems(self, requestor, target, nodeIdentifier=''):
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116 return []