# Copyright (C) 2002-2018 by the Free Software Foundation, Inc.
#
# 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
# USA.

"""
    confirm <confirmation-string>
        Confirm an action.  The confirmation-string is required and should be
        supplied by a mailback confirmation notice.
"""

from Mailman import mm_cfg
from Mailman import Errors
from Mailman import Pending
from Mailman.i18n import _

STOP = 1



def gethelp(mlist):
    return _(__doc__)



def process(res, args):
    mlist = res.mlist
    if len(args) <> 1:
        res.results.append(_('Usage:'))
        res.results.append(gethelp(mlist))
        return STOP
    cookie = args[0]
    try:
        results = mlist.ProcessConfirmation(cookie, res.msg)
    except Errors.MMBadConfirmation, e:
        # Express in approximate days
        days = int(mm_cfg.PENDING_REQUEST_LIFE / mm_cfg.days(1) + 0.5)
        res.results.append(_("""\
Invalid confirmation string.  Note that confirmation strings expire
approximately %(days)s days after the initial request.  They also expire if
the request has already been handled in some way.  If your confirmation has
expired, please try to re-submit your original request or message."""))
    except Errors.MMNeedApproval:
        res.results.append(_("""\
Your request has been forwarded to the list moderator for approval."""))
    except Errors.MMAlreadyAMember:
        # Some other subscription request for this address has
        # already succeeded.
        res.results.append(_('You are already subscribed.'))
    except Errors.NotAMemberError:
        # They've already been unsubscribed
        res.results.append(_("""\
You are not currently a member.  Have you already unsubscribed or changed
your email address?"""))
    except Errors.MembershipIsBanned:
        owneraddr = mlist.GetOwnerEmail()
        res.results.append(_("""\
You are currently banned from subscribing to this list.  If you think this
restriction is erroneous, please contact the list owners at
%(owneraddr)s."""))
    except Errors.HostileSubscriptionError:
        res.results.append(_("""\
You were not invited to this mailing list.  The invitation has been discarded,
and both list administrators have been alerted."""))
    except Errors.MMBadPasswordError:
        res.results.append(_("""\
Bad approval password given.  Held message is still being held."""))
    else:
        if ((results[0] == Pending.SUBSCRIPTION and mlist.send_welcome_msg)
            or
            (results[0] == Pending.UNSUBSCRIPTION and mlist.send_goodbye_msg)):
            # We don't also need to send a confirmation succeeded message
            res.respond = 0
        else:
            if results[0] == Pending.HELD_MESSAGE:
                if results[1] == mm_cfg.APPROVE:
                    res.results.append(_('Confirmation succeeded') + 
                               ' (' + _('Approve') + ')')
                else:
                    res.results.append(_('Confirmation succeeded') + 
                               ' (' + _('Discard') + ')')
            else:
                res.results.append(_('Confirmation succeeded'))
            # Consume any other confirmation strings with the same cookie so
            # the user doesn't get a misleading "unprocessed" message.
            # Also consume any Approve(d): line as it was processed.
            match = 'confirm ' + cookie
            unprocessed = []
            for line in res.commands:
                try:
                    if (line.lstrip() == match or
                            line.lstrip().lower().startswith('approved:') or
                            line.lstrip().lower().startswith('approve:')):
                        continue
                except UnicodeError:
                    pass
                unprocessed.append(line)
            res.commands = unprocessed
    # Process just one confirmation string per message
    return STOP