view frontends/src/quick_frontend/quick_utils.py @ 853:c2f6ada7858f

core (sqlite): automatic database update: - new Updater class check database consistency (by calculating a hash on the .schema), and updates base if necessary - database now has a version (1 for current, 0 will be for 0.3's database), for each change this version will be increased - creation statements and update statements are in the form of dict of dict with tuples. There is a help text at the top of the module to explain how it works - if we are on a development version, the updater try to update the database automaticaly (without deleting table or columns). The Updater.generateUpdateData method can be used to ease the creation of update data (i.e. the dictionary at the top, see the one for the key 1 for an example). - if there is an inconsistency, an exception is raised, and a message indicate the SQL statements that should fix the situation. - well... this is rather complicated, a KISS method would maybe have been better. The future will say if we need to simplify it :-/ - new DatabaseError exception
author Goffi <goffi@goffi.org>
date Sun, 23 Feb 2014 23:30:32 +0100
parents 1fe00f0c9a91
children 75025461141f
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#!/usr/bin/python
# -*- coding: utf-8 -*-

# Primitivus: a SAT frontend
# Copyright (C) 2009, 2010, 2011, 2012, 2013, 2014 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/>.

from sat.tools.jid  import JID
from os.path import exists, splitext
from sat_frontends.quick_frontend.constants import Const

def escapePrivate(ori_jid):
    """Escape a private jid"""
    return JID(Const.PRIVATE_PREFIX + ori_jid.bare + '@' + ori_jid.resource)

def unescapePrivate(escaped_jid):
    if not escaped_jid.startswith(Const.PRIVATE_PREFIX):
        return escaped_jid
    escaped_split = tuple(escaped_jid[len(Const.PRIVATE_PREFIX):].split('@'))
    assert(len(escaped_split) == 3)
    return JID("%s@%s/%s" % escaped_split)

def getNewPath(path):
    """ Check if path exists, and find a non existant path if needed """
    idx = 2
    if not exists(path):
        return path
    root, ext = splitext(path)
    while True:
        new_path = "%s_%d%s" % (root, idx, ext)
        if not exists(new_path):
            return new_path
        idx+=1