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annotate sat/plugins/plugin_xep_0465.py @ 4037:524856bd7b19

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massive refactoring to switch from camelCase to snake_case: historically, Libervia (SàT before) was using camelCase as allowed by PEP8 when using a pre-PEP8 code, to use the same coding style as in Twisted. However, snake_case is more readable and it's better to follow PEP8 best practices, so it has been decided to move on full snake_case. Because Libervia has a huge codebase, this ended with a ugly mix of camelCase and snake_case. To fix that, this patch does a big refactoring by renaming every function and method (including bridge) that are not coming from Twisted or Wokkel, to use fully snake_case. This is a massive change, and may result in some bugs.
author Goffi <goffi@goffi.org>
date Sat, 08 Apr 2023 13:54:42 +0200
parents 56e5b18f4d06
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 #!/usr/bin/env python3
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2
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3 # Libervia plugin for XEP-0465
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4 # Copyright (C) 2009-2021 Jérôme Poisson (goffi@goffi.org)
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5
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6 # This program is free software: you can redistribute it and/or modify
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7 # it under the terms of the GNU Affero General Public License as published by
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8 # the Free Software Foundation, either version 3 of the License, or
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9 # (at your option) any later version.
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10
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11 # This program is distributed in the hope that it will be useful,
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12 # but WITHOUT ANY WARRANTY; without even the implied warranty of
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13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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14 # GNU Affero General Public License for more details.
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15
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16 # You should have received a copy of the GNU Affero General Public License
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17 # along with this program. If not, see <http://www.gnu.org/licenses/>.
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19 from typing import Optional, List, Dict, Union
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21 from twisted.words.protocols.jabber.xmlstream import XMPPHandler
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22 from twisted.words.protocols.jabber import jid
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23 from twisted.words.protocols.jabber import error
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24 from twisted.words.xish import domish
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25 from zope.interface import implementer
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26 from wokkel import disco, iwokkel
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27
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28 from sat.core.constants import Const as C
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29 from sat.core.i18n import _
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30 from sat.core.log import getLogger
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31 from sat.core import exceptions
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32 from sat.core.core_types import SatXMPPEntity
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33 from sat.tools import utils
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34 from sat.tools.common import data_format
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35
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36 log = getLogger(__name__)
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37
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38 PLUGIN_INFO = {
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39 C.PI_NAME: "Pubsub Public Subscriptions",
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40 C.PI_IMPORT_NAME: "XEP-0465",
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41 C.PI_TYPE: C.PLUG_TYPE_XEP,
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42 C.PI_MODES: C.PLUG_MODE_BOTH,
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43 C.PI_PROTOCOLS: ["XEP-0465"],
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44 C.PI_DEPENDENCIES: ["XEP-0060", "XEP-0376"],
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45 C.PI_MAIN: "XEP_0465",
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46 C.PI_HANDLER: "yes",
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47 C.PI_DESCRIPTION: _("""Pubsub Public Subscriptions implementation"""),
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48 }
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49
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50 NS_PPS = "urn:xmpp:pps:0"
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51 NS_PPS_SUBSCRIPTIONS = "urn:xmpp:pps:subscriptions:0"
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52 NS_PPS_SUBSCRIBERS = "urn:xmpp:pps:subscribers:0"
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53 SUBSCRIBERS_NODE_PREFIX = f"{NS_PPS_SUBSCRIBERS}/"
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54 NOT_IMPLEMENTED_MSG = (
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55 "The service at {service!s} doesn't seem to support Pubsub Public Subscriptions "
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56 "(XEP-0465), please request support from your service administrator."
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57 )
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58
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59
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60 class XEP_0465:
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61
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62 def __init__(self, host):
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63 log.info(_("Pubsub Public Subscriptions initialization"))
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64 host.register_namespace("pps", NS_PPS)
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65 self.host = host
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66 host.bridge.add_method(
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67 "ps_public_subscriptions_get",
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68 ".plugin",
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69 in_sign="sss",
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70 out_sign="s",
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71 method=self._subscriptions,
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72 async_=True,
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73 )
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74 host.bridge.add_method(
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75 "ps_public_subscriptions_get",
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76 ".plugin",
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77 in_sign="sss",
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78 out_sign="s",
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79 method=self._subscriptions,
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80 async_=True,
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81 )
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82 host.bridge.add_method(
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83 "ps_public_node_subscriptions_get",
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84 ".plugin",
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85 in_sign="sss",
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86 out_sign="a{ss}",
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87 method=self._get_public_node_subscriptions,
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88 async_=True,
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89 )
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90
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91 def get_handler(self, client):
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92 return XEP_0465_Handler()
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93
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94 @property
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95 def subscriptions_node(self) -> str:
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96 return NS_PPS_SUBSCRIPTIONS
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97
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98 @property
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99 def subscribers_node_prefix(self) -> str:
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100 return SUBSCRIBERS_NODE_PREFIX
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101
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102 def build_subscription_elt(self, node: str, service: jid.JID) -> domish.Element:
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103 """Generate a <subscriptions> element
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104
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105 This is the element that a service returns on public subscriptions request
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106 """
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107 subscription_elt = domish.Element((NS_PPS, "subscription"))
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108 subscription_elt["node"] = node
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109 subscription_elt["service"] = service.full()
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110 return subscription_elt
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111
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112 def build_subscriber_elt(self, subscriber: jid.JID) -> domish.Element:
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113 """Generate a <subscriber> element
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114
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115 This is the element that a service returns on node public subscriptions request
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116 """
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117 subscriber_elt = domish.Element((NS_PPS, "subscriber"))
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118 subscriber_elt["jid"] = subscriber.full()
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119 return subscriber_elt
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120
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121 @utils.ensure_deferred
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122 async def _subscriptions(
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123 self,
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124 service="",
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125 nodeIdentifier="",
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126 profile_key=C.PROF_KEY_NONE
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127 ) -> str:
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128 client = self.host.get_client(profile_key)
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129 service = None if not service else jid.JID(service)
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130 subs = await self.subscriptions(client, service, nodeIdentifier or None)
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131 return data_format.serialise(subs)
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132
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133 async def subscriptions(
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134 self,
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135 client: SatXMPPEntity,
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136 service: Optional[jid.JID] = None,
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137 node: Optional[str] = None
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138 ) -> List[Dict[str, Union[str, bool]]]:
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139 """Retrieve public subscriptions from a service
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140
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141 @param service(jid.JID): PubSub service
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142 @param nodeIdentifier(unicode, None): node to filter
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143 None to get all subscriptions
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144 """
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145 if service is None:
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146 service = client.jid.userhostJID()
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147 try:
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148 items, __ = await self.host.plugins["XEP-0060"].get_items(
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149 client, service, NS_PPS_SUBSCRIPTIONS
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150 )
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151 except error.StanzaError as e:
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152 if e.condition == "forbidden":
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153 log.warning(NOT_IMPLEMENTED_MSG.format(service=service))
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154 return []
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155 else:
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156 raise e
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157 ret = []
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158 for item in items:
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159 try:
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160 subscription_elt = next(item.elements(NS_PPS, "subscription"))
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161 except StopIteration:
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162 log.warning(f"no <subscription> element found: {item.toXml()}")
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163 continue
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164
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165 try:
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166 sub_dict = {
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167 "service": subscription_elt["service"],
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168 "node": subscription_elt["node"],
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169 "subscriber": service.full(),
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170 "state": subscription_elt.getAttribute("subscription", "subscribed"),
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171 }
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172 except KeyError:
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173 log.warning(
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174 f"invalid <subscription> element: {subscription_elt.toXml()}"
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175 )
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176 continue
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177 if node is not None and sub_dict["node"] != node:
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178 # if not is specified, we filter out any other node
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179 # FIXME: should node filtering be done by server?
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180 continue
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181 ret.append(sub_dict)
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182 return ret
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183
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184 @utils.ensure_deferred
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185 async def _get_public_node_subscriptions(
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186 self,
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187 service: str,
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188 node: str,
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189 profile_key: str
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190 ) -> Dict[str, str]:
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191 client = self.host.get_client(profile_key)
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192 subs = await self.get_public_node_subscriptions(
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193 client, jid.JID(service) if service else None, node
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194 )
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195 return {j.full(): a for j, a in subs.items()}
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196
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197 def get_public_subscribers_node(self, node: str) -> str:
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198 """Return prefixed node to retrieve public subscribers"""
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199 return f"{NS_PPS_SUBSCRIBERS}/{node}"
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200
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201 async def get_public_node_subscriptions(
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202 self,
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203 client: SatXMPPEntity,
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204 service: Optional[jid.JID],
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205 nodeIdentifier: str
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206 ) -> Dict[jid.JID, str]:
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207 """Retrieve public subscriptions to a node
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208
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209 @param nodeIdentifier(unicode): node to get subscriptions from
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210 """
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211 if not nodeIdentifier:
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212 raise exceptions.DataError("node identifier can't be empty")
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213
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214 if service is None:
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diff changeset
215 service = client.jid.userhostJID()
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216
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217 subscribers_node = self.get_public_subscribers_node(nodeIdentifier)
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218
4008
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219 try:
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220 items, __ = await self.host.plugins["XEP-0060"].get_items(
4008
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parents: 3758
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221 client, service, subscribers_node
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222 )
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223 except error.StanzaError as e:
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224 if e.condition == "forbidden":
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225 log.warning(NOT_IMPLEMENTED_MSG.format(service=service))
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226 return {}
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227 else:
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228 raise e
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229 ret = {}
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230 for item in items:
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231 try:
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232 subscriber_elt = next(item.elements(NS_PPS, "subscriber"))
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233 except StopIteration:
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234 log.warning(f"no <subscriber> element found: {item.toXml()}")
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235 continue
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236
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237 try:
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238 ret[jid.JID(subscriber_elt["jid"])] = "subscribed"
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239 except (KeyError, RuntimeError):
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240 log.warning(
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241 f"invalid <subscriber> element: {subscriber_elt.toXml()}"
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242 )
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Goffi <goffi@goffi.org>
parents:
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243 continue
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244 return ret
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245
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246 def set_public_opt(self, options: Optional[dict] = None) -> dict:
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247 """Set option to make a subscription public
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248
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249 @param options: dict where the option must be set
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250 if None, a new dict will be created
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251
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252 @return: the options dict
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253 """
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254 if options is None:
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255 options = {}
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256 options[f'{{{NS_PPS}}}public'] = True
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257 return options
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258
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259
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parents:
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260 @implementer(iwokkel.IDisco)
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parents:
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261 class XEP_0465_Handler(XMPPHandler):
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262
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parents:
diff changeset
263 def getDiscoInfo(self, requestor, service, nodeIdentifier=""):
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parents:
diff changeset
264 return [disco.DiscoFeature(NS_PPS)]
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265
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parents:
diff changeset
266 def getDiscoItems(self, requestor, service, nodeIdentifier=""):
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diff changeset
267 return []