view libervia/frontends/tools/strings.py @ 4094:c3b68fdc2de7

component AP gateway: fix handling of XMPP comments authors: the gateway was supposing that comments where emitted from PEP of author. While this is the case for most blog posts, it's not for comments. Instead the component is now using `author_jid` which is retrieved by XEP-0277 plugin, and reject the item if the auhor is not verified (i.e. if `publisher` attribute is not set by XMPP service).
author Goffi <goffi@goffi.org>
date Mon, 12 Jun 2023 14:50:43 +0200
parents 26b7ed2817da
children 0d7bb4df2343
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#!/usr/bin/env python3


# SAT helpers methods for plugins
# Copyright (C) 2013-2016 Adrien Cossa (souliane@mailoo.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/>.

import re

# Regexp from http://daringfireball.net/2010/07/improved_regex_for_matching_urls
RE_URL = re.compile(
    r"""(?i)\b((?:[a-z]{3,}://|(www|ftp)\d{0,3}[.]|[a-z0-9.\-]+[.][a-z]{2,4}/|mailto:|xmpp:|geo:)(?:[^\s()<>]+|\(([^\s()<>]+|(\([^\s()<>]+\)))*\))+(?:\(([^\s()<>]+|(\([^\s()<>]+\)))*\)|[^\s`!()\[\]{};:'".,<>?]))"""
)


# TODO: merge this class with an other module or at least rename it (strings is not a good name)


def get_url_params(url):
    """This comes from pyjamas.Location.makeUrlDict with a small change
    to also parse full URLs, and parameters with no value specified
    (in that case the default value "" is used).
    @param url: any URL with or without parameters
    @return: a dictionary of the parameters, if any was given, or {}
    """
    dict_ = {}
    if "/" in url:
        # keep the part after the last "/"
        url = url[url.rindex("/") + 1 :]
    if url.startswith("?"):
        # remove the first "?"
        url = url[1:]
    pairs = url.split("&")
    for pair in pairs:
        if len(pair) < 3:
            continue
        kv = pair.split("=", 1)
        dict_[kv[0]] = kv[1] if len(kv) > 1 else ""
    return dict_


def add_url_to_text(string, new_target=True):
    """Check a text for what looks like an URL and make it clickable.

    @param string (unicode): text to process
    @param new_target (bool): if True, make the link open in a new window
    """
    # XXX: report any change to libervia.browser.strings.add_url_to_text
    def repl(match):
        url = match.group(0)
        if not re.match(r"""[a-z]{3,}://|mailto:|xmpp:""", url):
            url = "http://" + url
        target = ' target="_blank"' if new_target else ""
        return '<a href="%s"%s class="url">%s</a>' % (url, target, match.group(0))

    return RE_URL.sub(repl, string)


def add_url_to_image(string):
    """Check a XHTML text for what looks like an imageURL and make it clickable.

    @param string (unicode): text to process
    """
    # XXX: report any change to libervia.browser.strings.add_url_to_image
    def repl(match):
        url = match.group(1)
        return '<a href="%s" target="_blank">%s</a>' % (url, match.group(0))

    pattern = r"""<img[^>]* src="([^"]+)"[^>]*>"""
    return re.sub(pattern, repl, string)


def fix_xhtml_links(xhtml):
    """Add http:// if the scheme is missing and force opening in a new window.

    @param string (unicode): XHTML Content
    """
    subs = []
    for match in re.finditer(r'<a( \w+="[^"]*")* ?/?>', xhtml):
        tag = match.group(0)
        url = re.search(r'href="([^"]*)"', tag)
        if url and not url.group(1).startswith("#"):  # skip internal anchor
            if not re.search(r'target="([^"]*)"', tag):  # no target
                subs.append((tag, '<a target="_blank"%s' % tag[2:]))
            if not re.match(r"^\w+://", url.group(1)):  # no scheme
                subs.append((url.group(0), 'href="http://%s"' % url.group(1)))

    for url, new_url in subs:
        xhtml = xhtml.replace(url, new_url)
    return xhtml