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annotate src/tools/misc.py @ 668:7bb50096d225

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plugin XEP_0071: first draft a new "xhtml" key is added in bridge newMessage's extra data when rich text is found.
author Goffi <goffi@goffi.org>
date Tue, 05 Nov 2013 22:41:45 +0100
parents 84a6e83157c2
children 00318e60a06a
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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: a jabber client
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5 # Copyright (C) 2009, 2010, 2011, 2012, 2013 Jérôme Poisson (goffi@goffi.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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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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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 """Misc usefull classes"""
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23 class TriggerException(Exception):
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24 pass
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27 class SkipOtherTriggers(Exception):
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28 """ Exception to raise if normal behaviour must be followed instead of
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29 followind triggers list """
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30 pass
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33 class TriggerManager(object):
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34 """This class manage triggers: code which interact to change de behaviour
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35 of SàT"""
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37 def __init__(self):
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38 self.__triggers = {}
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40 def add(self, point_name, callback, priority=0):
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41 """Add a trigger to a point
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42 @param point_name: name of the point when the trigger should be run
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43 @param callback: method to call at the trigger point
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44 @param priority: callback will be called in priority order, biggest
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45 first
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46 """
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47 if point_name not in self.__triggers:
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48 self.__triggers[point_name] = []
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49 self.__triggers[point_name].append((priority, callback))
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50 self.__triggers[point_name].sort(key=lambda trigger_tuple:
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51 trigger_tuple[0], reverse=True)
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53 def remove(self, point_name, callback):
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54 """Remove a trigger from a point
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55 @param point_name: name of the point when the trigger should be run
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56 @param callback: method to remove, must exists in the trigger point"""
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57 for trigger_tuple in self.__triggers[point_name]:
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58 if trigger_tuple[1] == callback:
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59 self.__triggers[point_name].remove(trigger_tuple)
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60 return
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61 raise TriggerException("Trying to remove an unexisting trigger")
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63 def point(self, point_name, *args, **kwargs):
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64 """This put a trigger point
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65 All the trigger for that point will be run
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66 @param point_name: name of the trigger point
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67 @return: True if the action must be continued, False else"""
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68 if point_name not in self.__triggers:
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69 return True
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71 for priority,trigger in self.__triggers[point_name]:
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72 try:
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73 if not trigger(*args, **kwargs):
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74 return False
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75 except SkipOtherTriggers:
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76 break
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77 return True