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annotate sat/tools/common/regex.py @ 3118:02492db1ce39

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quick frontend (app): call `getReady` once connected to bridge: namespaces and encryption plugins are only retrieved once backend is ready, else they may not yet be available (can happen notably when the backend is start at the same time as the frontend, e.g. on Android).
author Goffi <goffi@goffi.org>
date Sat, 25 Jan 2020 21:08:26 +0100
parents ab2696e34d29
children 9d0df638c8b4
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1 #!/usr/bin/env python3
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2 # -*- coding: utf-8 -*-
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3
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4 # Salut à Toi: an XMPP client
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5 # Copyright (C) 2009-2019 Jérôme Poisson (goffi@goffi.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
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20 """ regex tools common to backend and frontends """
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21
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22 import re
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23
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24 path_escape = {"%": "%25", "/": "%2F", "\\": "%5c"}
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25 path_escape_rev = {re.escape(v): k for k, v in path_escape.items()}
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26 path_escape = {re.escape(k): v for k, v in path_escape.items()}
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27 #  thanks to Martijn Pieters (https://stackoverflow.com/a/14693789)
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28 RE_ANSI_REMOVE = re.compile(r"\x1b[^m]*m")
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31 def reJoin(exps):
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32 """Join (OR) various regexes"""
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33 return re.compile("|".join(exps))
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36 def reSubDict(pattern, repl_dict, string):
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37 """Replace key, value found in dict according to pattern
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38
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39 @param pattern(basestr): pattern using keys found in repl_dict
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40 @repl_dict(dict): keys found in this dict will be replaced by
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41 corresponding values
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42 @param string(basestr): string to use for the replacement
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43 """
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44 return pattern.sub(lambda m: repl_dict[re.escape(m.group(0))], string)
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46
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47 path_escape_re = reJoin(list(path_escape.keys()))
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48 path_escape_rev_re = reJoin(list(path_escape_rev.keys()))
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51 def pathEscape(string):
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52 """Escape string so it can be use in a file path
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53
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54 @param string(basestr): string to escape
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55 @return (str, unicode): escaped string, usable in a file path
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56 """
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57 return reSubDict(path_escape_re, path_escape, string)
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60 def pathUnescape(string):
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61 """Unescape string from value found in file path
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63 @param string(basestr): string found in file path
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64 @return (str, unicode): unescaped string
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65 """
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66 return reSubDict(path_escape_rev_re, path_escape_rev, string)
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68
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69 def ansiRemove(string):
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70 """Remove ANSI escape codes from string
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72 @param string(basestr): string to filter
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73 @return (str, unicode): string without ANSI escape codes
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74 """
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75 return RE_ANSI_REMOVE.sub("", string)