Mercurial > libervia-backend
annotate libervia/backend/plugins/plugin_xep_0424.py @ 4294:a0ed5c976bf8 default tip @
component conferences, plugin XEP-0167, XEP-0298: add stream user metadata:
A/V conference now adds user metadata about the stream it is forwarding through XEP-0298.
This is parsed and added to metadata during confirmation on client side.
rel 448
author | Goffi <goffi@goffi.org> |
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date | Tue, 06 Aug 2024 23:43:11 +0200 |
parents | 7eda7cb8a15c |
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1 #!/usr/bin/env python3 |
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2 |
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3 # Copyright (C) 2009-2022 Jérôme Poisson (goffi@goffi.org) |
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4 |
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5 # This program is free software: you can redistribute it and/or modify |
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6 # it under the terms of the GNU Affero General Public License as published by |
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7 # the Free Software Foundation, either version 3 of the License, or |
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8 # (at your option) any later version. |
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9 |
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10 # This program is distributed in the hope that it will be useful, |
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11 # but WITHOUT ANY WARRANTY; without even the implied warranty of |
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12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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13 # GNU Affero General Public License for more details. |
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14 |
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15 # You should have received a copy of the GNU Affero General Public License |
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16 # along with this program. If not, see <http://www.gnu.org/licenses/>. |
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17 |
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18 import time |
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19 from typing import Any, Dict |
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20 |
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21 from sqlalchemy.orm.attributes import flag_modified |
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22 from twisted.internet import defer |
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23 from twisted.words.protocols.jabber import jid, xmlstream |
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24 from twisted.words.xish import domish |
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25 from wokkel import disco |
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26 from zope.interface import implementer |
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27 |
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28 from libervia.backend.core import exceptions |
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29 from libervia.backend.core.constants import Const as C |
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30 from libervia.backend.core.core_types import MessageData, SatXMPPEntity |
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31 from libervia.backend.core.i18n import D_, _ |
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32 from libervia.backend.core.log import getLogger |
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33 from libervia.backend.memory.sqla_mapping import History |
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34 from libervia.backend.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 |
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39 PLUGIN_INFO = { |
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40 C.PI_NAME: "Message Retraction", |
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41 C.PI_IMPORT_NAME: "XEP-0424", |
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42 C.PI_TYPE: "XEP", |
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43 C.PI_MODES: C.PLUG_MODE_BOTH, |
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44 C.PI_PROTOCOLS: ["XEP-0424"], |
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45 C.PI_DEPENDENCIES: ["XEP-0334", "XEP-0428"], |
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46 C.PI_RECOMMENDATIONS: ["XEP-0045"], |
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47 C.PI_MAIN: "XEP_0424", |
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48 C.PI_HANDLER: "yes", |
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49 C.PI_DESCRIPTION: _("""Implementation Message Retraction"""), |
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50 } |
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51 |
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52 NS_MESSAGE_RETRACT = "urn:xmpp:message-retract:1" |
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53 |
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54 CATEGORY = "Privacy" |
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55 NAME = "retract_history" |
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56 LABEL = D_("Keep History of Retracted Messages") |
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57 PARAMS = """ |
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58 <params> |
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59 <individual> |
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60 <category name="{category_name}"> |
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61 <param name="{name}" label="{label}" type="bool" value="false" /> |
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62 </category> |
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63 </individual> |
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64 </params> |
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65 """.format( |
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66 category_name=CATEGORY, name=NAME, label=_(LABEL) |
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67 ) |
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68 |
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69 |
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70 class XEP_0424: |
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71 def __init__(self, host): |
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72 log.info(f"plugin {PLUGIN_INFO[C.PI_NAME]!r} initialization") |
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73 self.host = host |
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74 host.memory.update_params(PARAMS) |
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75 self._h = host.plugins["XEP-0334"] |
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76 self._m = host.plugins.get("XEP-0045") |
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77 host.register_namespace("message-retract", NS_MESSAGE_RETRACT) |
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78 host.trigger.add("message_received", self._message_received_trigger, 100) |
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79 host.bridge.add_method( |
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80 "message_retract", |
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81 ".plugin", |
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82 in_sign="ss", |
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83 out_sign="", |
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84 method=self._retract, |
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85 async_=True, |
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86 ) |
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87 |
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88 def get_handler(self, __): |
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89 return XEP_0424_handler() |
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90 |
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91 def _retract(self, message_id: str, profile: str) -> None: |
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92 client = self.host.get_client(profile) |
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93 return defer.ensureDeferred(self.retract(client, message_id)) |
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94 |
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95 def send_retract( |
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96 self, client: SatXMPPEntity, peer_jid: jid.JID, retract_id: str, history: History |
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97 ) -> None: |
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98 """Send a message retraction using origin-id |
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99 |
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100 [retract] should be prefered: internal ID should be used as it is independant of |
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101 XEPs changes. However, in some case messages may not be stored in database |
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102 (notably for some components), and then this method can be used |
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103 |
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104 @param retract_id: ID (origin or stanza according to XEP-0359) of message to |
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105 retract |
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106 @param history: history instance of the message to retract |
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107 """ |
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108 message_elt = domish.Element((None, "message")) |
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109 message_elt["from"] = client.jid.full() |
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110 message_elt["to"] = peer_jid.full() |
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111 message_elt["type"] = history.type |
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112 retract_elt = message_elt.addElement((NS_MESSAGE_RETRACT, "retract")) |
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113 retract_elt["id"] = retract_id |
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114 self.host.plugins["XEP-0428"].add_fallback_elt( |
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115 message_elt, |
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116 "[A message retraction has been requested, but your client doesn't support " |
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117 "it]", |
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118 ) |
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119 self._h.add_hint_elements(message_elt, [self._h.HINT_STORE]) |
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120 client.send(message_elt) |
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121 |
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122 async def retract_by_history(self, client: SatXMPPEntity, history: History) -> None: |
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123 """Send a message retraction using History instance |
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124 |
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125 This method is to use instead of [retract] when the history instance is already |
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126 retrieved. Note that the instance must have messages and subjets loaded |
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127 @param history: history instance of the message to retract |
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128 """ |
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129 if history.type == C.MESS_TYPE_GROUPCHAT: |
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130 is_group_chat = True |
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131 peer_jid = jid.JID(history.source) |
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132 retract_id = history.stanza_id |
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133 else: |
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134 is_group_chat = False |
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135 peer_jid = jid.JID(history.dest) |
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136 if self._m is not None and self._m.is_joined_room(client, peer_jid): |
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137 # it's actually a private MUC message, we need the full JID. |
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138 peer_jid = history.dest_jid |
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139 retract_id = history.origin_id |
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140 |
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141 if not retract_id: |
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142 raise exceptions.FeatureNotFound( |
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143 "Message to retract doesn't have the necessary ID, the sending client is " |
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144 "probably not supporting message retraction." |
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145 ) |
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146 |
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147 self.send_retract(client, peer_jid, retract_id, history) |
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148 if not is_group_chat: |
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149 # retraction will happen when <retract> message will be received in the |
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150 # chat. |
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151 await self.retract_db_history(client, history) |
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152 |
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153 async def retract( |
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154 self, |
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155 client: SatXMPPEntity, |
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156 message_id: str, |
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157 ) -> None: |
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158 """Send a message retraction request |
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159 |
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160 @param message_id: ID of the message |
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161 This ID is the Libervia internal ID of the message. It will be retrieve from |
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162 database to find the ID used by XMPP (i.e. XEP-0359's "origin ID"). If the |
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163 message is not found in database, an exception will be raised |
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164 """ |
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165 if not message_id: |
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166 raise ValueError("message_id can't be empty") |
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167 history = await self.host.memory.storage.get( |
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168 client, |
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169 History, |
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170 History.uid, |
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171 message_id, |
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172 joined_loads=[History.messages, History.subjects, History.thread], |
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173 ) |
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174 if history is None: |
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175 raise exceptions.NotFound( |
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176 f"message to retract not found in database ({message_id})" |
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177 ) |
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178 await self.retract_by_history(client, history) |
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179 |
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180 async def retract_db_history(self, client, history: History) -> None: |
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181 """Mark an history instance in database as retracted |
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182 |
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183 @param history: history instance |
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184 "messages" and "subjects" must be loaded too |
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185 """ |
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186 # FIXME: should we keep history? This is useful to check why a message has been |
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187 # retracted, but if may be bad if the user think it's really deleted |
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188 flag_modified(history, "extra") |
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189 keep_history = await self.host.memory.param_get_a_async( |
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190 NAME, CATEGORY, profile_key=client.profile |
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191 ) |
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192 old_version: Dict[str, Any] = {"timestamp": time.time()} |
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193 if keep_history: |
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194 old_version.update( |
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195 { |
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196 "messages": [m.serialise() for m in history.messages], |
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197 "subjects": [s.serialise() for s in history.subjects], |
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198 } |
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199 ) |
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200 |
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201 history.extra.setdefault("old_versions", []).append(old_version) |
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202 |
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203 history.messages.clear() |
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204 history.subjects.clear() |
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205 history.extra["retracted"] = True |
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206 # we remove editions history to keep no trace of old messages |
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207 if "editions" in history.extra: |
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208 del history.extra["editions"] |
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209 if "attachments" in history.extra: |
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210 del history.extra["attachments"] |
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211 await self.host.memory.storage.add(history) |
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212 |
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213 retract_data = MessageData(history.serialise()) |
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214 self.host.bridge.message_update( |
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215 history.uid, |
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216 C.MESS_UPDATE_RETRACT, |
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217 data_format.serialise(retract_data), |
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218 client.profile, |
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219 ) |
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220 |
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221 async def _message_received_trigger( |
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222 self, |
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223 client: SatXMPPEntity, |
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224 message_elt: domish.Element, |
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225 post_treat: defer.Deferred, |
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226 ) -> bool: |
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227 retract_elt = next(message_elt.elements(NS_MESSAGE_RETRACT, "retract"), None) |
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228 if not retract_elt: |
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229 return True |
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230 try: |
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231 if message_elt.getAttribute("type") == C.MESS_TYPE_GROUPCHAT: |
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232 col_id = History.stanza_id |
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233 else: |
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234 col_id = History.origin_id |
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235 history = await self.host.memory.storage.get( |
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236 client, |
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237 History, |
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238 col_id, |
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239 retract_elt["id"], |
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240 joined_loads=[History.messages, History.subjects, History.thread], |
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241 ) |
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242 except KeyError: |
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243 log.warning(f"invalid retract element, missing id: {retract_elt.toXml()}") |
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244 return False |
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245 from_jid = jid.JID(message_elt["from"]) |
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246 |
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247 if history is not None and ( |
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248 (history.type == C.MESS_TYPE_GROUPCHAT and history.source_jid != from_jid) |
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249 or ( |
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250 history.type != C.MESS_TYPE_GROUPCHAT |
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251 and history.source_jid.userhostJID() != from_jid.userhostJID() |
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252 ) |
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253 ): |
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254 log.warning( |
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255 f"Received message retraction from {from_jid.full()}, but the message to " |
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256 f"retract is from {history.source_jid.full()}. This maybe a hack " |
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257 f"attempt.\n{message_elt.toXml()}" |
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258 ) |
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259 return False |
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260 |
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261 if not await self.host.trigger.async_point( |
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262 "XEP-0424_retract_received", client, message_elt, retract_elt, history |
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263 ): |
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264 return False |
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265 |
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266 if history is None: |
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267 # we check history after the trigger because we may be in a component which |
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268 # doesn't store messages in database. |
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269 log.warning(f"No message found with given id: {message_elt.toXml()}") |
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270 return False |
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271 log.info(f"[{client.profile}] retracting message {history.uid!r}") |
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272 await self.retract_db_history(client, history) |
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273 return False |
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274 |
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275 |
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276 @implementer(disco.IDisco) |
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277 class XEP_0424_handler(xmlstream.XMPPHandler): |
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278 def getDiscoInfo(self, __, target, nodeIdentifier=""): |
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279 return [disco.DiscoFeature(NS_MESSAGE_RETRACT)] |
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280 |
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281 def getDiscoItems(self, requestor, target, nodeIdentifier=""): |
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282 return [] |