view sat_frontends/tools/misc.py @ 3513:753d151da886

XEP-0277: new preview/mbPreview method: This method does more or less the same thing as sending, but without actually sending the item, and parse the generated element just after. This way, the triggers are run, and a preview of the item can be made for the resulting microblog data.
author Goffi <goffi@goffi.org>
date Thu, 29 Apr 2021 15:49:59 +0200
parents 559a625a236b
children 80815f2f12cf
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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/>.


class InputHistory(object):
    def _updateInputHistory(self, text=None, step=None, callback=None, mode=""):
        """Update the lists of previously sent messages. Several lists can be
        handled as they are stored in a dictionary, the argument "mode" being
        used as the entry key. There's also a temporary list to allow you play
        with previous entries before sending a new message. Parameters values
        can be combined: text is None and step is None to initialize a main
        list and the temporary one, step is None to update a list and
        reinitialize the temporary one, step is not None to update
        the temporary list between two messages.
        @param text: text to be saved.
        @param step: step to move the temporary index.
        @param callback: method to display temporary entries.
        @param mode: the dictionary key for main lists.
        """
        if not hasattr(self, "input_histories"):
            self.input_histories = {}
        history = self.input_histories.setdefault(mode, [])
        if step is None and text is not None:
            # update the main list
            if text in history:
                history.remove(text)
            history.append(text)
        length = len(history)
        if step is None or length == 0:
            # prepare the temporary list and index
            self.input_history_tmp = history[:]
            self.input_history_tmp.append("")
            self.input_history_index = length
        if step is None:
            return
        # update the temporary list
        if text is not None:
            # save the current entry
            self.input_history_tmp[self.input_history_index] = text
        # move to another entry if possible
        index_tmp = self.input_history_index + step
        if index_tmp >= 0 and index_tmp < len(self.input_history_tmp):
            if callback is not None:
                callback(self.input_history_tmp[index_tmp])
            self.input_history_index = index_tmp


class FlagsHandler(object):
    """Small class to handle easily option flags

    the instance is initialized with an iterable
    then attribute return True if flag is set, False else.
    """

    def __init__(self, flags):
        self.flags = set(flags or [])
        self._used_flags = set()

    def __getattr__(self, flag):
        self._used_flags.add(flag)
        return flag in self.flags

    def __len__(self):
        return len(self.flags)

    def __iter__(self):
        return self.flags.__iter__()

    @property
    def all_used(self):
        """Return True if all flags have been used"""
        return self._used_flags.issuperset(self.flags)

    @property
    def unused(self):
        """Return flags which has not been used yet"""
        return self.flags.difference(self._used_flags)