Mercurial > libervia-backend
annotate src/plugins/plugin_xep_0085.py @ 719:56aa0e98c92e
frontends tools: moved src/tools/frontends to frontends/src/tools
author | souliane <souliane@mailoo.org> |
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date | Thu, 21 Nov 2013 18:57:10 +0100 |
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plugin XEP-0085: Chat State Notifications
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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 Chat State Notifications Protocol (xep-0085) |
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5 # Copyright (C) 2009, 2010, 2011, 2012, 2013 Adrien Cossa (souliane@mailoo.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 import exceptions |
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21 from logging import info |
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22 from wokkel import disco, iwokkel |
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23 from zope.interface import implements |
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24 from twisted.words.protocols.jabber.jid import JID |
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25 try: |
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26 from twisted.words.protocols.xmlstream import XMPPHandler |
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27 except ImportError: |
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28 from wokkel.subprotocols import XMPPHandler |
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29 from threading import Timer |
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30 from twisted.words.xish import domish |
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31 |
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32 NS_XMPP_CLIENT = "jabber:client" |
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33 NS_CHAT_STATES = "http://jabber.org/protocol/chatstates" |
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34 CHAT_STATES = ["active", "inactive", "gone", "composing", "paused"] |
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35 MESSAGE_TYPES = ["chat", "groupchat"] |
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36 PARAM_KEY = "Notifications" |
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37 PARAM_NAME = "Enable chat state notifications" |
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38 ENTITY_KEY = PARAM_KEY + "_" + PARAM_NAME |
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39 |
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40 PLUGIN_INFO = { |
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41 "name": "Chat State Notifications Protocol Plugin", |
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42 "import_name": "XEP-0085", |
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43 "type": "XEP", |
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44 "protocols": ["XEP-0085"], |
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45 "dependencies": [], |
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46 "main": "XEP_0085", |
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47 "handler": "yes", |
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48 "description": _("""Implementation of Chat State Notifications Protocol""") |
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49 } |
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50 |
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51 |
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52 # Describe the internal transitions that are triggered |
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53 # by a timer. Beside that, external transitions can be |
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54 # runned to target the states "active" or "composing". |
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55 # Delay is specified here in seconds. |
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56 TRANSITIONS = { |
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57 "active": {"next_state": "inactive", "delay": 120}, |
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58 "inactive": {"next_state": "gone", "delay": 480}, |
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59 "gone": {"next_state": "", "delay": 0}, |
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60 "composing": {"next_state": "paused", "delay": 30}, |
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61 "paused": {"next_state": "inactive", "delay": 450} |
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62 } |
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63 |
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64 |
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65 class UnknownChatStateException(Exception): |
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66 """ |
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67 This error is raised when an unknown chat state is used. |
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68 """ |
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69 pass |
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70 |
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71 |
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72 class XEP_0085(object): |
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73 """ |
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74 Implementation for XEP 0085 |
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75 """ |
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76 params = """ |
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77 <params> |
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78 <individual> |
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79 <category name="%(category_name)s" label="%(category_label)s"> |
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80 <param name="%(param_name)s" label="%(param_label)s" value="true" type="bool" security="0"/> |
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81 </category> |
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82 </individual> |
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83 </params> |
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84 """ % { |
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85 'category_name': PARAM_KEY, |
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86 'category_label': _(PARAM_KEY), |
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87 'param_name': PARAM_NAME, |
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88 'param_label': _('Enable chat state notifications') |
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89 } |
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90 |
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91 def __init__(self, host): |
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92 info(_("Chat State Notifications plugin initialization")) |
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93 self.host = host |
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94 |
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95 # parameter value is retrieved before each use |
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96 host.memory.updateParams(self.params) |
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97 |
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98 # triggers from core |
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99 host.trigger.add("MessageReceived", self.messageReceivedTrigger) |
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100 host.trigger.add("sendMessage", self.sendMessageTrigger) |
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101 host.trigger.add("paramUpdateTrigger", self.paramUpdateTrigger) |
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102 # TODO: handle profile disconnection (free memory in entity data) |
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103 |
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104 # args: to_s (jid as string), profile |
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105 host.bridge.addMethod("chatStateComposing", ".plugin", in_sign='ss', |
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106 out_sign='', method=self.chatStateComposing) |
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107 |
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108 # args: from (jid as string), state in CHAT_STATES, profile |
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109 host.bridge.addSignal("chatStateReceived", ".plugin", signature='sss') |
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110 |
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111 def getHandler(self, profile): |
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112 return XEP_0085_handler(self, profile) |
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113 |
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114 def updateEntityData(self, entity_jid, value, profile): |
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115 """ |
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116 Update the entity data of the given profile for one or all contacts. |
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117 Reset the chat state(s) display if the notification has been disabled. |
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118 @param entity_jid: contact's JID, or '@ALL@' to update all contacts. |
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119 @param value: True, False or '@NONE@' to delete the entity data |
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120 @param profile: current profile |
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121 """ |
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122 self.host.memory.updateEntityData(entity_jid, ENTITY_KEY, value, profile) |
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123 if not value or value == "@NONE@": |
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124 # disable chat state for this or these contact(s) |
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125 self.host.bridge.chatStateReceived(unicode(entity_jid), "", profile) |
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126 |
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127 def paramUpdateTrigger(self, name, value, category, type, profile): |
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128 """ |
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129 Reset all the existing chat state entity data associated with this profile after a parameter modification. |
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130 @param name: parameter name |
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131 @param value: "true" to activate the notifications, or any other value to delete it |
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132 @param category: parameter category |
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133 """ |
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134 if (category, name) == (PARAM_KEY, PARAM_NAME): |
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135 self.updateEntityData("@ALL@", True if value == "true" else "@NONE@", profile) |
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136 |
663 | 137 def messageReceivedTrigger(self, message, post_treat, profile): |
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138 """ |
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139 Update the entity cache when we receive a message with body. |
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140 Check for a check state in the incoming message and broadcast signal. |
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141 """ |
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142 if not self.host.memory.getParamA(PARAM_NAME, PARAM_KEY, profile_key=profile): |
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143 return True |
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144 |
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145 try: |
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146 domish.generateElementsNamed(message.elements(), name="body").next() |
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147 from_jid = JID(message.getAttribute("from")) |
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148 try: |
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149 domish.generateElementsNamed(message.elements(), name="active").next() |
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150 # contact enabled Chat State Notifications |
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151 self.updateEntityData(from_jid, True, profile) |
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152 # init to send following "composing" state |
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153 self.__chatStateInit(from_jid, message.getAttribute("type"), profile) |
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154 except StopIteration: |
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155 # contact didn't enable Chat State Notifications |
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156 self.updateEntityData(from_jid, False, profile) |
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157 return True |
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158 except StopIteration: |
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159 pass |
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160 |
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161 state_list = [child.name for child in message.elements() if |
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162 message.getAttribute("type") in MESSAGE_TYPES |
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163 and child.name in CHAT_STATES |
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164 and child.defaultUri == NS_CHAT_STATES] |
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165 for state in state_list: |
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166 # there must be only one state according to the XEP |
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167 self.host.bridge.chatStateReceived(message.getAttribute("from"), state, profile) |
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168 break |
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169 return True |
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170 |
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171 def sendMessageTrigger(self, mess_data, treatments, profile): |
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172 """ |
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173 Eventually add the chat state to the message and initiate |
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174 the state machine when sending an "active" state. |
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175 """ |
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176 def treatment(mess_data): |
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177 message = mess_data['xml'] |
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178 to_jid = JID(message.getAttribute("to")) |
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179 if not self.__checkActivation(to_jid, forceEntityData=True, profile=profile): |
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180 return True |
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181 try: |
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182 # message with a body always mean active state |
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183 domish.generateElementsNamed(message.elements(), name="body").next() |
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184 message.addElement('active', NS_CHAT_STATES) |
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185 # launch the chat state machine (init the timer) |
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186 self.__chatStateActive(to_jid, mess_data["type"], profile) |
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187 except StopIteration: |
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188 if "chat_state" in mess_data["extra"]: |
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189 state = mess_data["extra"].pop("chat_state") |
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190 assert(state in CHAT_STATES) |
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191 message.addElement(state, NS_CHAT_STATES) |
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192 return mess_data |
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193 |
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194 treatments.addCallback(treatment) |
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195 return True |
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196 |
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197 def __checkActivation(self, to_jid, forceEntityData, profile): |
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198 """ |
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199 @param to_joid: the contact's JID |
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200 @param forceEntityData: if set to True, a non-existing |
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201 entity data will be considered to be True (and initialized) |
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202 @param: current profile |
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203 @return: True if the notifications should be sent to this JID. |
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204 """ |
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205 # check if the parameter is active |
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206 if not self.host.memory.getParamA(PARAM_NAME, PARAM_KEY, profile_key=profile): |
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207 return False |
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208 # check if notifications should be sent to this contact |
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209 try: |
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210 return self.host.memory.getEntityData(to_jid, [ENTITY_KEY], profile)[ENTITY_KEY] |
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211 except (exceptions.UnknownEntityError, KeyError): |
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212 if forceEntityData: |
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213 # enable it for the first time |
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214 self.updateEntityData(to_jid, True, profile) |
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215 return True |
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216 # wait for the first message before sending states |
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217 return False |
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218 |
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219 def __chatStateInit(self, to_jid, mess_type, profile): |
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220 """ |
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221 Data initialization for the chat state machine. |
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222 """ |
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223 # TODO: use also the resource in map key |
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224 to_jid = to_jid.userhostJID() |
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225 if mess_type is None: |
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226 return |
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227 if not hasattr(self, "map"): |
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228 self.map = {} |
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229 profile_map = self.map.setdefault(profile, {}) |
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230 if not to_jid in profile_map: |
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231 machine = ChatStateMachine(self.host, to_jid, |
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232 mess_type, profile) |
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233 self.map[profile][to_jid] = machine |
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234 |
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235 def __chatStateActive(self, to_jid, mess_type, profile_key): |
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236 """ |
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237 Launch the chat state machine on "active" state. |
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238 """ |
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239 # TODO: use also the JID resource in the map key |
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240 to_jid = to_jid.userhostJID() |
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241 profile = self.host.memory.getProfileName(profile_key) |
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242 if profile is None: |
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243 raise exceptions.ProfileUnknownError |
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244 return |
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245 self.__chatStateInit(to_jid, mess_type, profile) |
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246 self.map[profile][to_jid]._onEvent("active") |
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247 |
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248 def chatStateComposing(self, to_jid_s, profile_key): |
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249 """ |
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250 Move to the "composing" state. Since this method is called |
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251 from the front-end, it needs to check the values of the |
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252 parameter "Send chat state notifications" and the entity |
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253 data associated to the target JID. |
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254 TODO: try to optimize this method which is called often |
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255 """ |
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256 # TODO: use also the JID resource in the map key |
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257 to_jid = JID(to_jid_s).userhostJID() |
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258 profile = self.host.memory.getProfileName(profile_key) |
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259 if profile is None: |
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260 raise exceptions.ProfileUnknownError |
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261 return |
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262 if not self.__checkActivation(to_jid, forceEntityData=False, profile=profile): |
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263 return |
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264 try: |
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265 self.map[profile][to_jid]._onEvent("composing") |
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266 except AttributeError: |
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267 # no message has been sent/received since the notifications |
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268 # have been enabled, it's better to wait for a first one |
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269 pass |
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270 |
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271 |
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272 class ChatStateMachine: |
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273 """ |
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274 This class represents a chat state, between one profile and |
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275 one target contact. A timer is used to move from one state |
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276 to the other. The initialization is done through the "active" |
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277 state which is internally set when a message is sent. The state |
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278 "composing" can be set externally (through the bridge by a |
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279 frontend). Other states are automatically set with the timer. |
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280 """ |
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281 |
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282 def __init__(self, host, to_jid, mess_type, profile): |
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283 """ |
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284 Initialization need to store the target, message type |
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285 and a profile for sending later messages. |
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286 """ |
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287 self.host = host |
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288 self.to_jid = to_jid |
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289 self.mess_type = mess_type |
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290 self.profile = profile |
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291 self.state = None |
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292 self.timer = None |
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293 |
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294 def _onEvent(self, state): |
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295 """ |
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296 Move to the specified state, eventually send the |
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297 notification to the contact (the "active" state is |
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298 automatically sent with each message) and set the timer. |
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299 """ |
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300 if state != self.state and state != "active": |
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301 # send a new message without body |
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302 self.host.sendMessage(self.to_jid, |
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303 '', |
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304 '', |
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305 self.mess_type, |
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306 extra={"chat_state": state}, |
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307 profile_key=self.profile) |
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308 self.state = state |
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309 if not self.timer is None: |
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310 self.timer.cancel() |
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311 |
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312 if not state in TRANSITIONS: |
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313 return |
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314 if not "next_state" in TRANSITIONS[state]: |
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315 return |
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316 if not "delay" in TRANSITIONS[state]: |
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317 return |
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318 next_state = TRANSITIONS[state]["next_state"] |
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319 delay = TRANSITIONS[state]["delay"] |
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320 if next_state == "" or delay < 0: |
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321 return |
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322 self.timer = Timer(delay, self._onEvent, [next_state]) |
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323 self.timer.start() |
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324 |
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325 |
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326 class XEP_0085_handler(XMPPHandler): |
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327 implements(iwokkel.IDisco) |
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328 |
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329 def __init__(self, plugin_parent, profile): |
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330 self.plugin_parent = plugin_parent |
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331 self.host = plugin_parent.host |
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332 self.profile = profile |
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333 |
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334 def getDiscoInfo(self, requestor, target, nodeIdentifier=''): |
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335 return [disco.DiscoFeature(NS_CHAT_STATES)] |
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336 |
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337 def getDiscoItems(self, requestor, target, nodeIdentifier=''): |
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338 return [] |