## $Id: workflow.py 7192 2011-11-25 07:15:50Z henrik $
##
## Copyright (C) 2011 Uli Fouquet & Henrik Bettermann
## 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
##
"""Workflow for applicants.
"""
import grok
from hurry.workflow.workflow import Transition, WorkflowState, NullCondition
from hurry.workflow.interfaces import IWorkflowState, IWorkflowTransitionEvent
from waeup.sirp.applicants.interfaces import IApplicantBaseData
from waeup.sirp.interfaces import IObjectHistory, IWAeUPWorkflowInfo
from waeup.sirp.workflow import WAeUPWorkflow, WAeUPWorkflowInfo
from waeup.sirp.utils.helpers import get_current_principal

INITIALIZED = 'initialized'
STARTED = 'started'
SUBMITTED = 'submitted'
ADMITTED = 'admitted'
NOT_ADMITTED = 'not admitted'
CREATED = 'created'

APPLICATION_TRANSITIONS = (
    Transition(
        transition_id = 'init',
        title = 'Initialize application',
        source = None,
        condition = NullCondition,
        msg = 'Application initialized',
        destination = INITIALIZED),

    Transition(
        transition_id = 'start',
        title = 'Start application',
        msg = 'Application started',
        source = INITIALIZED,
        destination = STARTED),

    Transition(
        transition_id = 'submit',
        title = 'Submit application',
        msg = 'Application submitted',
        source = STARTED,
        destination = SUBMITTED),

    Transition(
        transition_id = 'admit',
        title = 'Admit applicant',
        msg = 'Applicant admitted',
        source = SUBMITTED,
        destination = ADMITTED),

    Transition(
        transition_id = 'refuse1',
        title = 'Refuse application',
        msg = 'Application refused',
        source = SUBMITTED,
        destination = NOT_ADMITTED),

    Transition(
        transition_id = 'refuse2',
        title = 'Refuse application',
        msg = 'Application refused',
        source = ADMITTED,
        destination = NOT_ADMITTED),

    Transition(
        transition_id = 'create',
        title = 'Create student record',
        msg = 'Student record created',
        source = ADMITTED,
        destination = CREATED),

    Transition(
        transition_id = 'reset1',
        title = 'Reset application',
        msg = 'Application reset',
        source = SUBMITTED,
        destination = STARTED),

    Transition(
        transition_id = 'reset2',
        title = 'Reset application',
        msg = 'Application reset',
        source = ADMITTED,
        destination = STARTED),

    Transition(
        transition_id = 'reset3',
        title = 'Reset application',
        msg = 'Application reset',
        source = NOT_ADMITTED,
        destination = STARTED),

    Transition(
        transition_id = 'reset4',
        title = 'Reset application',
        msg = 'Application reset',
        source = CREATED,
        destination = STARTED),
    )

application_workflow = WAeUPWorkflow(APPLICATION_TRANSITIONS)

class ApplicationWorkflowState(WorkflowState, grok.Adapter):
    """An adapter to adapt Applicant objects to workflow states.
    """
    grok.context(IApplicantBaseData)
    grok.provides(IWorkflowState)

    state_key = 'wf.application.state'
    state_id = 'wf.application.id'

class ApplicationWorkflowInfo(WAeUPWorkflowInfo, grok.Adapter):
    """Adapter to adapt Applicant objects to workflow info objects.
    """
    grok.context(IApplicantBaseData)
    grok.provides(IWAeUPWorkflowInfo)

    def __init__(self, context):
        self.context = context
        self.wf = application_workflow

@grok.subscribe(IApplicantBaseData, IWorkflowTransitionEvent)
def handle_applicant_transition_event(obj, event):
    """Append message to applicant history when transition happened.
    """
    msg = '%s' % event.transition.user_data['msg']
    history = IObjectHistory(obj)
    history.addMessage(msg)
    # In some tests we don't have a an applicants root or a user
    try:
        user = get_current_principal()
        applicants_root = grok.getSite()['applicants']
        applicants_root.logger.info('%s - %s - %s' % (user.id,obj.access_code,msg))
    except (TypeError, AttributeError):
        pass
    return