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annotate src/browser/sat_browser/plugin_xep_0085.py @ 995:f88325b56a6a

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server: dynamic pages first draft: /!\ new dependency: autobahn This patch introduce server part of dynamic pages. Dynamic pages use websockets to establish constant connection with a Libervia page, allowing to receive real time data or update it. The feature is activated by specifying "dynamic = true" in the page. Once activated, page can implement "on_data" method which will be called when data are sent by the page. To send data the other way, the page can use request.sendData. The new "registerSignal" method allows to use an "on_signal" method to be called each time given signal is received, with automatic (and optional) filtering on profile. New renderPartial and renderAndUpdate method allow to append new HTML elements to the dynamic page.
author Goffi <goffi@goffi.org>
date Wed, 03 Jan 2018 01:10:12 +0100 (2018-01-03)
parents f8a7a046ff9c
children
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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) 2013-2016 Adrien Cossa (souliane@mailoo.org)
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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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20 from pyjamas.Timer import Timer
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23 # Copy of the map from sat/src/plugins/plugin_xep_0085
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24 TRANSITIONS = {"active": {"next_state": "inactive", "delay": 120},
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25 "inactive": {"next_state": "gone", "delay": 480},
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26 "gone": {"next_state": "", "delay": 0},
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27 "composing": {"next_state": "paused", "delay": 30},
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28 "paused": {"next_state": "inactive", "delay": 450}
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29 }
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32 class ChatStateMachine:
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33 """This is an adapted version of the ChatStateMachine from sat/src/plugins/plugin_xep_0085
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34 which manage a timer on the web browser and keep it synchronized with the timer that runs
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35 on the backend. This is only needed to avoid calling the bridge method chatStateComposing
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36 too often ; accuracy is not needed so we can ignore the delay of the communication between
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37 the web browser and the backend (the timer on the web browser always starts a bit before).
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38 /!\ Keep this file up to date if you modify the one in the sat plugins directory.
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39 """
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40 def __init__(self, host, target_s):
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41
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42 self.host = host
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43 self.target_s = target_s
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44 self.started = False
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45 self.state = None
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46 self.timer = None
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47
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48 def _onEvent(self, state):
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49 # Pyjamas callback takes no extra argument so we need this trick
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51 # Here we should check the value of the parameter "Send chat state notifications"
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52 # but this costs two messages. It's even better to call chatStateComposing
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53 # with a doubt, it will be checked by the back-end anyway before sending
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54 # the actual notifications to the other client.
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55 if state == "composing" and not self.started:
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56 return
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57 self.started = True
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58 self.next_state = state
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59 self.__onEvent(None)
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61 def __onEvent(self, timer):
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62 state = self.next_state
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64 assert(state in TRANSITIONS)
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65 transition = TRANSITIONS[state]
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66 assert("next_state" in transition and "delay" in transition)
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68 if state != self.state and state == "composing":
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69 self.host.bridge.call('chatStateComposing', None, self.target_s)
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71 self.state = state
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72 if self.timer is not None:
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73 self.timer.cancel()
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74
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75 if transition["next_state"] and transition["delay"] > 0:
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76 self.next_state = transition["next_state"]
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77 self.timer = Timer(transition["delay"] * 1000, self.__onEvent) # pyjamas timer is in milliseconds