# UI base class
# Copyright (C) 2002 John Goerzen
# <jgoerzen@complete.org>
#
#    This program is free software; you can redistribute it and/or modify
#    it under the terms of the GNU General Public License as published by
#    the Free Software Foundation; either version 2 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 General Public License for more details.
#
#    You should have received a copy of the GNU General Public License
#    along with this program; if not, write to the Free Software
#    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

from offlineimap.ui import *
import sys

def findUI(config):
    uistrlist = ['Tk.TKUI', 'TTY.TTYUI']
    if config.has_option("general", "ui"):
        uistrlist = config.get("general", "ui").replace(" ", "").split(",")
    for uistr in uistrlist:
        uimod = getUImod(uistr)
        if uimod and uimod.isusable():
            return uimod
    sys.stderr.write("ERROR: No UIs were found usable!\n")
    sys.exit(200)
    
def getUImod(uistr):
    try:
        uimod = eval(uistr)
    except AttributeError, NameError:
        return None
    return uimod