Mercurial > libervia-backend
annotate src/plugins/plugin_xep_0085.py @ 917:a9401694d2dc
bridge, frontends: display presence with the highest priority + reset your own presence when you (dis)connect
author | souliane <souliane@mailoo.org> |
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date | Thu, 20 Mar 2014 21:18:18 +0100 |
parents | 1a759096ccbd |
children | c897c8d321b3 |
rev | line source |
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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) |
811 | 5 # Copyright (C) 2009, 2010, 2011, 2012, 2013, 2014 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 |
771 | 20 from sat.core.i18n import _ |
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21 from sat.core.constants import Const as C |
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22 from sat.core import exceptions |
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23 from logging import info |
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24 from wokkel import disco, iwokkel |
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25 from zope.interface import implements |
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26 from twisted.words.protocols.jabber.jid import JID |
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27 try: |
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28 from twisted.words.protocols.xmlstream import XMPPHandler |
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29 except ImportError: |
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30 from wokkel.subprotocols import XMPPHandler |
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31 from threading import Timer |
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32 from twisted.words.xish import domish |
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33 |
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34 NS_XMPP_CLIENT = "jabber:client" |
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35 NS_CHAT_STATES = "http://jabber.org/protocol/chatstates" |
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36 CHAT_STATES = ["active", "inactive", "gone", "composing", "paused"] |
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37 MESSAGE_TYPES = ["chat", "groupchat"] |
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38 PARAM_KEY = "Notifications" |
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39 PARAM_NAME = "Enable chat state notifications" |
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40 ENTITY_KEY = PARAM_KEY + "_" + PARAM_NAME |
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41 |
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42 PLUGIN_INFO = { |
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43 "name": "Chat State Notifications Protocol Plugin", |
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44 "import_name": "XEP-0085", |
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45 "type": "XEP", |
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46 "protocols": ["XEP-0085"], |
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47 "dependencies": [], |
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48 "main": "XEP_0085", |
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49 "handler": "yes", |
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50 "description": _("""Implementation of Chat State Notifications Protocol""") |
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51 } |
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52 |
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53 |
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54 # Describe the internal transitions that are triggered |
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55 # by a timer. Beside that, external transitions can be |
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56 # runned to target the states "active" or "composing". |
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57 # Delay is specified here in seconds. |
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58 TRANSITIONS = { |
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59 "active": {"next_state": "inactive", "delay": 120}, |
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60 "inactive": {"next_state": "gone", "delay": 480}, |
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61 "gone": {"next_state": "", "delay": 0}, |
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62 "composing": {"next_state": "paused", "delay": 30}, |
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63 "paused": {"next_state": "inactive", "delay": 450} |
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64 } |
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65 |
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66 |
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67 class UnknownChatStateException(Exception): |
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68 """ |
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69 This error is raised when an unknown chat state is used. |
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70 """ |
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71 pass |
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72 |
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73 |
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74 class XEP_0085(object): |
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75 """ |
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76 Implementation for XEP 0085 |
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77 """ |
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78 params = """ |
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79 <params> |
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80 <individual> |
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81 <category name="%(category_name)s" label="%(category_label)s"> |
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82 <param name="%(param_name)s" label="%(param_label)s" value="true" type="bool" security="0"/> |
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83 </category> |
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84 </individual> |
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85 </params> |
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86 """ % { |
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87 'category_name': PARAM_KEY, |
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88 'category_label': _(PARAM_KEY), |
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89 'param_name': PARAM_NAME, |
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90 'param_label': _('Enable chat state notifications') |
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91 } |
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92 |
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93 def __init__(self, host): |
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94 info(_("Chat State Notifications plugin initialization")) |
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95 self.host = host |
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96 |
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97 # parameter value is retrieved before each use |
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98 host.memory.updateParams(self.params) |
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99 |
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100 # triggers from core |
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101 host.trigger.add("MessageReceived", self.messageReceivedTrigger) |
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102 host.trigger.add("sendMessage", self.sendMessageTrigger) |
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103 host.trigger.add("paramUpdateTrigger", self.paramUpdateTrigger) |
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104 # TODO: handle profile disconnection (free memory in entity data) |
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105 |
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106 # args: to_s (jid as string), profile |
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107 host.bridge.addMethod("chatStateComposing", ".plugin", in_sign='ss', |
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108 out_sign='', method=self.chatStateComposing) |
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109 |
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110 # args: from (jid as string), state in CHAT_STATES, profile |
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111 host.bridge.addSignal("chatStateReceived", ".plugin", signature='sss') |
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112 |
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113 def getHandler(self, profile): |
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114 return XEP_0085_handler(self, profile) |
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115 |
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116 def updateEntityData(self, entity_jid, value, profile): |
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117 """ |
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118 Update the entity data of the given profile for one or all contacts. |
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119 Reset the chat state(s) display if the notification has been disabled. |
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120 @param entity_jid: contact's JID, or '@ALL@' to update all contacts. |
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121 @param value: True, False or C.PROF_KEY_NONE to delete the entity data |
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122 @param profile: current profile |
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123 """ |
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124 self.host.memory.updateEntityData(entity_jid, ENTITY_KEY, value, profile) |
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125 if not value or value == C.PROF_KEY_NONE: |
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126 # disable chat state for this or these contact(s) |
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127 self.host.bridge.chatStateReceived(unicode(entity_jid), "", profile) |
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128 |
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129 def paramUpdateTrigger(self, name, value, category, type, profile): |
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130 """ |
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131 Reset all the existing chat state entity data associated with this profile after a parameter modification. |
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132 @param name: parameter name |
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133 @param value: "true" to activate the notifications, or any other value to delete it |
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134 @param category: parameter category |
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135 """ |
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136 if (category, name) == (PARAM_KEY, PARAM_NAME): |
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137 self.updateEntityData("@ALL@", True if value == "true" else C.PROF_KEY_NONE, profile) |
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138 return False |
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139 return True |
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140 |
663 | 141 def messageReceivedTrigger(self, message, post_treat, profile): |
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142 """ |
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143 Update the entity cache when we receive a message with body. |
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144 Check for a chat state in the message and signal frontends. |
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145 """ |
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146 if not self.host.memory.getParamA(PARAM_NAME, PARAM_KEY, profile_key=profile): |
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147 return True |
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148 |
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149 from_jid = JID(message.getAttribute("from")) |
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150 try: |
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151 domish.generateElementsNamed(message.elements(), name="body").next() |
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152 try: |
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153 domish.generateElementsNamed(message.elements(), name="active").next() |
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154 # contact enabled Chat State Notifications |
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155 self.updateEntityData(from_jid, True, profile) |
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156 except StopIteration: |
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157 if message.getAttribute('type') == 'chat': |
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158 # contact didn't enable Chat State Notifications |
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159 self.updateEntityData(from_jid, False, profile) |
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160 return True |
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161 except StopIteration: |
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162 pass |
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163 |
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164 # send our next "composing" states to any MUC and to the contacts who enabled the feature |
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165 self.__chatStateInit(from_jid, message.getAttribute("type"), profile) |
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166 |
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167 state_list = [child.name for child in message.elements() if |
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168 message.getAttribute("type") in MESSAGE_TYPES |
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169 and child.name in CHAT_STATES |
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170 and child.defaultUri == NS_CHAT_STATES] |
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171 for state in state_list: |
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172 # there must be only one state according to the XEP |
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173 if state != 'gone' or message.getAttribute('type') != 'groupchat': |
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174 self.host.bridge.chatStateReceived(message.getAttribute("from"), state, profile) |
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175 break |
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176 return True |
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177 |
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178 def sendMessageTrigger(self, mess_data, treatments, profile): |
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179 """ |
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180 Eventually add the chat state to the message and initiate |
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181 the state machine when sending an "active" state. |
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182 """ |
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183 def treatment(mess_data): |
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184 message = mess_data['xml'] |
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185 to_jid = JID(message.getAttribute("to")) |
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186 if not self.__checkActivation(to_jid, forceEntityData=True, profile=profile): |
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187 return mess_data |
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188 try: |
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189 # message with a body always mean active state |
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190 domish.generateElementsNamed(message.elements(), name="body").next() |
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191 message.addElement('active', NS_CHAT_STATES) |
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192 # launch the chat state machine (init the timer) |
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193 self.__chatStateActive(to_jid, mess_data["type"], profile) |
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194 except StopIteration: |
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195 if "chat_state" in mess_data["extra"]: |
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196 state = mess_data["extra"].pop("chat_state") |
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197 assert(state in CHAT_STATES) |
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198 message.addElement(state, NS_CHAT_STATES) |
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199 return mess_data |
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200 |
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201 treatments.addCallback(treatment) |
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202 return True |
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203 |
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204 def __checkActivation(self, to_jid, forceEntityData, profile): |
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205 """ |
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206 @param to_joid: the contact's JID |
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207 @param forceEntityData: if set to True, a non-existing |
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208 entity data will be considered to be True (and initialized) |
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209 @param: current profile |
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210 @return: True if the notifications should be sent to this JID. |
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211 """ |
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212 # check if the parameter is active |
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213 if not self.host.memory.getParamA(PARAM_NAME, PARAM_KEY, profile_key=profile): |
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214 return False |
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215 # check if notifications should be sent to this contact |
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216 try: |
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217 type_ = self.host.memory.getEntityData(to_jid, ['type'], profile)['type'] |
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218 if type_ == 'groupchat': # always send to groupchat |
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219 return True |
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220 except (exceptions.UnknownEntityError, KeyError): |
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221 pass # private chat |
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222 try: |
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223 return self.host.memory.getEntityData(to_jid, [ENTITY_KEY], profile)[ENTITY_KEY] |
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224 except (exceptions.UnknownEntityError, KeyError): |
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225 if forceEntityData: |
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226 # enable it for the first time |
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227 self.updateEntityData(to_jid, True, profile) |
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228 return True |
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229 # wait for the first message before sending states |
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230 return False |
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231 |
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232 def __chatStateInit(self, to_jid, mess_type, profile): |
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233 """ |
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234 Data initialization for the chat state machine. |
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235 """ |
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236 # TODO: use also the resource in map key (not for groupchat) |
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237 to_jid = to_jid.userhostJID() |
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238 if mess_type is None: |
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239 return |
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240 if not hasattr(self, "map"): |
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241 self.map = {} |
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242 profile_map = self.map.setdefault(profile, {}) |
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243 if not to_jid in profile_map: |
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244 machine = ChatStateMachine(self.host, to_jid, |
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245 mess_type, profile) |
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246 self.map[profile][to_jid] = machine |
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247 |
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248 def __chatStateActive(self, to_jid, mess_type, profile_key): |
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249 """ |
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250 Launch the chat state machine on "active" state. |
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251 """ |
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252 # TODO: use also the JID resource in the map key (not for groupchat) |
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253 to_jid = to_jid.userhostJID() |
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254 profile = self.host.memory.getProfileName(profile_key) |
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255 if profile is None: |
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256 raise exceptions.ProfileUnknownError |
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257 return |
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258 self.__chatStateInit(to_jid, mess_type, profile) |
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259 self.map[profile][to_jid]._onEvent("active") |
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260 |
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261 def chatStateComposing(self, to_jid_s, profile_key): |
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262 """ |
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263 Move to the "composing" state. Since this method is called |
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264 from the front-end, it needs to check the values of the |
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265 parameter "Send chat state notifications" and the entity |
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266 data associated to the target JID. |
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267 TODO: try to optimize this method which is called often |
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268 """ |
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269 # TODO: use also the JID resource in the map key (not for groupchat) |
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270 to_jid = JID(to_jid_s).userhostJID() |
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271 profile = self.host.memory.getProfileName(profile_key) |
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272 if profile is None: |
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273 raise exceptions.ProfileUnknownError |
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274 return |
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275 if not self.__checkActivation(to_jid, forceEntityData=False, profile=profile): |
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276 return |
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277 try: |
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278 self.map[profile][to_jid]._onEvent("composing") |
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279 except (KeyError, AttributeError): |
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280 # no message has been sent/received since the notifications |
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281 # have been enabled, it's better to wait for a first one |
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282 pass |
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283 |
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284 |
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285 class ChatStateMachine: |
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286 """ |
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287 This class represents a chat state, between one profile and |
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288 one target contact. A timer is used to move from one state |
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289 to the other. The initialization is done through the "active" |
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290 state which is internally set when a message is sent. The state |
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291 "composing" can be set externally (through the bridge by a |
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292 frontend). Other states are automatically set with the timer. |
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293 """ |
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294 |
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295 def __init__(self, host, to_jid, mess_type, profile): |
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296 """ |
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297 Initialization need to store the target, message type |
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298 and a profile for sending later messages. |
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299 """ |
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300 self.host = host |
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301 self.to_jid = to_jid |
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302 self.mess_type = mess_type |
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303 self.profile = profile |
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304 self.state = None |
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305 self.timer = None |
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306 |
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307 def _onEvent(self, state): |
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308 """ |
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309 Move to the specified state, eventually send the |
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310 notification to the contact (the "active" state is |
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311 automatically sent with each message) and set the timer. |
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312 """ |
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313 if state != self.state and state != "active": |
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314 if state != 'gone' or self.mess_type != 'groupchat': |
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315 # send a new message without body |
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316 self.host.sendMessage(self.to_jid, '', '', self.mess_type, |
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317 extra={"chat_state": state}, |
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318 profile_key=self.profile) |
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319 self.state = state |
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320 if not self.timer is None: |
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321 self.timer.cancel() |
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322 |
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323 if not state in TRANSITIONS: |
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324 return |
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325 if not "next_state" in TRANSITIONS[state]: |
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326 return |
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327 if not "delay" in TRANSITIONS[state]: |
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328 return |
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329 next_state = TRANSITIONS[state]["next_state"] |
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330 delay = TRANSITIONS[state]["delay"] |
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331 if next_state == "" or delay < 0: |
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332 return |
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333 self.timer = Timer(delay, self._onEvent, [next_state]) |
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334 self.timer.start() |
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335 |
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336 |
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337 class XEP_0085_handler(XMPPHandler): |
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338 implements(iwokkel.IDisco) |
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339 |
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340 def __init__(self, plugin_parent, profile): |
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341 self.plugin_parent = plugin_parent |
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342 self.host = plugin_parent.host |
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343 self.profile = profile |
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344 |
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345 def getDiscoInfo(self, requestor, target, nodeIdentifier=''): |
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346 return [disco.DiscoFeature(NS_CHAT_STATES)] |
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347 |
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348 def getDiscoItems(self, requestor, target, nodeIdentifier=''): |
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349 return [] |