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annotate src/tools/misc.py @ 1031:e90125d07072

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plugins misc_account, misc_smtp: update the plugins that deal with passwords
author souliane <souliane@mailoo.org>
date Mon, 12 May 2014 17:51:38 +0200
parents 301b342c697a
children ba41a81d14c2
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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, 2014 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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21
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22 from sat.core.i18n import _
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23 import sys
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24 from sat.core.log import getLogger
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25 log = getLogger(__name__)
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28 class TriggerException(Exception):
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29 pass
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32 class SkipOtherTriggers(Exception):
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33 """ Exception to raise if normal behaviour must be followed instead of
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34 following triggers list """
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35 pass
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38 class TriggerManager(object):
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39 """This class manage triggers: code which interact to change the behaviour
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40 of SàT"""
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42 MIN_PRIORITY = float('-inf')
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43 MAX_PRIORITY = float('+inf')
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45 def __init__(self):
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46 self.__triggers = {}
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48 def add(self, point_name, callback, priority=0):
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49 """Add a trigger to a point
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50 @param point_name: name of the point when the trigger should be run
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51 @param callback: method to call at the trigger point
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52 @param priority: callback will be called in priority order, biggest
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53 first
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54 """
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55 if point_name not in self.__triggers:
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56 self.__triggers[point_name] = []
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57 if priority != 0 and priority in [trigger_tuple[0] for trigger_tuple in self.__triggers[point_name]]:
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58 if priority in (self.MIN_PRIORITY, self.MAX_PRIORITY):
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59 log.warning(_("There is already a bound priority [%s]") % point_name)
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60 else:
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61 log.debug(_("There is already a trigger with the same priority [%s]") % point_name)
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62 self.__triggers[point_name].append((priority, callback))
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63 self.__triggers[point_name].sort(key=lambda trigger_tuple:
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64 trigger_tuple[0], reverse=True)
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66 def remove(self, point_name, callback):
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67 """Remove a trigger from a point
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68 @param point_name: name of the point when the trigger should be run
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69 @param callback: method to remove, must exists in the trigger point"""
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70 for trigger_tuple in self.__triggers[point_name]:
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71 if trigger_tuple[1] == callback:
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72 self.__triggers[point_name].remove(trigger_tuple)
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73 return
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74 raise TriggerException("Trying to remove an unexisting trigger")
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76 def point(self, point_name, *args, **kwargs):
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77 """This put a trigger point
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78 All the trigger for that point will be run
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79 @param point_name: name of the trigger point
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80 @return: True if the action must be continued, False else"""
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81 if point_name not in self.__triggers:
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82 return True
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83
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84 for priority,trigger in self.__triggers[point_name]:
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85 try:
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86 if not trigger(*args, **kwargs):
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87 return False
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88 except SkipOtherTriggers:
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89 break
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90 return True