view src/tools/common/regex.py @ 2287:ea869f30f204

plugin events: added eventInvite command as a helper for the complex invitation workflow: when this command is used: - an email invitation is sent with the event node set - invitee's jid is affiliated to event - invitee's jid is affiliated to invitee's node as a publisher - invitee's jid is affiliated to blog's node as a member - invitee's jid is affiliated to every blog's item's comments node as a publisher last affiliation complex operation is currently needed because of the way blogs and comments are handled, but this need to be changed in the future with XEP proposal.
author Goffi <goffi@goffi.org>
date Thu, 29 Jun 2017 20:57:12 +0200
parents 2daf7b4c6756
children ad2a8e8b52da
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#!/usr/bin/env python2
# -*- coding: utf-8 -*-

# Salut à Toi: an XMPP client
# Copyright (C) 2009-2016 Jérôme Poisson (goffi@goffi.org)

# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.

# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU Affero General Public License for more details.

# You should have received a copy of the GNU Affero General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

""" regex tools common to backend and frontends """

import re
path_escape = {'%': '%25', '/': '%2F', '\\': '%5c'}
path_escape_rev = {re.escape(v):k for k, v in path_escape.iteritems()}
path_escape = {re.escape(k):v for k, v in path_escape.iteritems()}


def reJoin(exps):
    """Join (OR) various regexes"""
    return re.compile('|'.join(exps))


def reSubDict(pattern, repl_dict, string):
    """Replace key, value found in dict according to pattern

    @param pattern(basestr): pattern using keys found in repl_dict
    @repl_dict(dict): keys found in this dict will be replaced by
        corresponding values
    @param string(basestr): string to use for the replacement
    """
    return pattern.sub(lambda m: repl_dict[re.escape(m.group(0))], string)

path_escape_re = reJoin(path_escape.keys())
path_escape_rev_re = reJoin(path_escape_rev.keys())


def pathEscape(string):
    """Escape string so it can be use in a file path

    @param string(basestr): string to escape
    @return (str, unicode): escaped string, usable in a file path
    """
    return reSubDict(path_escape_re, path_escape, string)


def pathUnescape(string):
    """Unescape string from value found in file path

    @param string(basestr): string found in file path
    @return (str, unicode): unescaped string
    """
    return reSubDict(path_escape_rev_re, path_escape_rev, string)