#
#  Copyright (c) 2009 Helmut Merz helmutm@cy55.de
#
#  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
#

"""
Definition of view classes and other browser related stuff for job management.

$Id$
"""

from logging import getLogger
from zope import component
from zope.cachedescriptors.property import Lazy

from cybertools.meta.interfaces import IOptions
from cybertools.organize.interfaces import IJobManager


class Executor(object):
    """ A view whose processJobs method should be called via cron + wget
        in order to execute all jobs that are found.
    """

    def __init__(self, context, request):
        self.context = context
        self.request = request

    @Lazy
    def options(self):
        return IOptions(self.context)

    @Lazy
    def logger(self):
        return getLogger('loops.organize.job')

    def processJobs(self):
        output = []
        names = [n for n in self.request.get('job_managers', '').split(',') if n]
        if not names:
            names = self.options('organize.job.managers', [])
        for name in names:
            manager = component.queryAdapter(self.context, IJobManager, name=name)
            if manager is None:
                msg = "Job manager '%s' not found." % name
                self.logger.warn(msg)
                output.append(msg)
            else:
                output.append(manager.process())
        if not output:
            return 'No job managers available.'
        return '\n'.join(m for m in output if m)