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annotate libervia/backend/plugins/plugin_xep_0428.py @ 4270:0d7bb4df2343

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Reformatted code base using black.
author Goffi <goffi@goffi.org>
date Wed, 19 Jun 2024 18:44:57 +0200
parents a1f7040b5a15
children
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2033fa3c5b85 plugin XEP-0428: Fallback Indication implementation:
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1 #!/usr/bin/env python3
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2
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3 # Copyright (C) 2009-2022 Jérôme Poisson (goffi@goffi.org)
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4
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5 # This program is free software: you can redistribute it and/or modify
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6 # it under the terms of the GNU Affero General Public License as published by
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7 # the Free Software Foundation, either version 3 of the License, or
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8 # (at your option) any later version.
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9
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10 # This program is distributed in the hope that it will be useful,
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11 # but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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13 # GNU Affero General Public License for more details.
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14
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15 # You should have received a copy of the GNU Affero General Public License
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16 # along with this program. If not, see <http://www.gnu.org/licenses/>.
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17
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18 from typing import Optional
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19
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20 from twisted.words.protocols.jabber import xmlstream
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21 from twisted.words.xish import domish
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22 from wokkel import disco
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23 from zope.interface import implementer
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24
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25 from libervia.backend.core.constants import Const as C
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26 from libervia.backend.core.i18n import _
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27 from libervia.backend.core.log import getLogger
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28
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29 log = getLogger(__name__)
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30
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31
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32 PLUGIN_INFO = {
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33 C.PI_NAME: "Fallback Indication",
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34 C.PI_IMPORT_NAME: "XEP-0428",
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35 C.PI_TYPE: "XEP",
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36 C.PI_MODES: C.PLUG_MODE_BOTH,
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37 C.PI_PROTOCOLS: ["XEP-0428"],
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38 C.PI_MAIN: "XEP_0428",
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39 C.PI_HANDLER: "yes",
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40 C.PI_DESCRIPTION: _("""Implementation of XEP-0428 (Fallback Indication)"""),
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41 }
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42
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43 NS_FALLBACK = "urn:xmpp:fallback:0"
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44
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45
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46 class XEP_0428(object):
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47
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48 def __init__(self, host):
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49 log.info(_("XEP-0428 (Fallback Indication) plugin initialization"))
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50 host.register_namespace("fallback", NS_FALLBACK)
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51
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52 def add_fallback_elt(
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53 self, message_elt: domish.Element, msg: Optional[str] = None
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54 ) -> None:
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55 """Add the fallback indication element
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56
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57 @param message_elt: <message> element where the indication must be
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58 set
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59 @param msg: message to show as fallback
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60 Will be added as <body>
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61 """
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62 message_elt.addElement((NS_FALLBACK, "fallback"))
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63 if msg is not None:
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64 message_elt.addElement("body", content=msg)
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65
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66 def has_fallback(self, message_elt: domish.Element) -> bool:
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67 """Tell if a message has a fallback indication"""
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68 try:
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69 next(message_elt.elements(NS_FALLBACK, "fallback"))
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70 except StopIteration:
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71 return False
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72 else:
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73 return True
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74
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75 def get_handler(self, __):
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76 return XEP_0428_handler()
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77
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78
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79 @implementer(disco.IDisco)
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80 class XEP_0428_handler(xmlstream.XMPPHandler):
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81
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82 def getDiscoInfo(self, __, target, nodeIdentifier=""):
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83 return [disco.DiscoFeature(NS_FALLBACK)]
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84
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85 def getDiscoItems(self, requestor, target, nodeIdentifier=""):
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86 return []