source: main/waeup.kofa/trunk/src/waeup/kofa/students/browser.py @ 10090

## $Id: browser.py 10080 2013-04-14 15:33:09Z 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
##
"""UI components for students and related components.
"""
import sys
import grok
from urllib import urlencode
from datetime import datetime
from zope.event import notify
from zope.i18n import translate
from zope.catalog.interfaces import ICatalog
from zope.component import queryUtility, getUtility, createObject
from zope.schema.interfaces import ConstraintNotSatisfied, RequiredMissing
from zope.formlib.textwidgets import BytesDisplayWidget
from zope.security import checkPermission
from hurry.workflow.interfaces import IWorkflowInfo, IWorkflowState
from waeup.kofa.accesscodes import (
    invalidate_accesscode, get_access_code)
from waeup.kofa.accesscodes.workflow import USED
from waeup.kofa.browser.layout import (
    KofaPage, KofaEditFormPage, KofaAddFormPage, KofaDisplayFormPage,
    KofaForm, NullValidator)
from waeup.kofa.browser.breadcrumbs import Breadcrumb
from waeup.kofa.browser.pages import ContactAdminForm, ExportCSVView, doll_up
from waeup.kofa.browser.resources import (
    datepicker, datatable, tabs, warning, toggleall)
from waeup.kofa.browser.layout import jsaction, action, UtilityView
from waeup.kofa.browser.interfaces import ICaptchaManager
from waeup.kofa.hostels.hostel import NOT_OCCUPIED
from waeup.kofa.interfaces import (
    IKofaObject, IUserAccount, IExtFileStore, IPasswordValidator, IContactForm,
    IKofaUtils, IUniversity, IObjectHistory, academic_sessions, ICSVExporter,
    academic_sessions_vocab, IJobManager, IDataCenter)
from waeup.kofa.interfaces import MessageFactory as _
from waeup.kofa.widgets.datewidget import (
    FriendlyDateWidget, FriendlyDateDisplayWidget,
    FriendlyDatetimeDisplayWidget)
from waeup.kofa.mandates.mandate import PasswordMandate
from waeup.kofa.university.interfaces import (
    IDepartment, ICertificate, ICourse)
from waeup.kofa.university.department import (
    VirtualDepartmentExportJobContainer,)
from waeup.kofa.university.certificate import (
    VirtualCertificateExportJobContainer,)
from waeup.kofa.university.course import (
    VirtualCourseExportJobContainer,)
from waeup.kofa.university.vocabularies import course_levels
from waeup.kofa.utils.batching import VirtualExportJobContainer
from waeup.kofa.utils.helpers import get_current_principal, to_timezone
from waeup.kofa.widgets.restwidget import ReSTDisplayWidget
from waeup.kofa.students.interfaces import (
    IStudentsContainer, IStudent,
    IUGStudentClearance,IPGStudentClearance,
    IStudentPersonal, IStudentPersonalEdit, IStudentBase, IStudentStudyCourse,
    IStudentStudyCourseTransfer,
    IStudentAccommodation, IStudentStudyLevel,
    ICourseTicket, ICourseTicketAdd, IStudentPaymentsContainer,
    IStudentOnlinePayment, IStudentPreviousPayment, IStudentBalancePayment,
    IBedTicket, IStudentsUtils, IStudentRequestPW
    )
from waeup.kofa.students.catalog import search, StudentQueryResultItem
from waeup.kofa.students.export import EXPORTER_NAMES
from waeup.kofa.students.studylevel import StudentStudyLevel, CourseTicket
from waeup.kofa.students.vocabularies import StudyLevelSource
from waeup.kofa.students.workflow import (CREATED, ADMITTED, PAID,
    CLEARANCE, REQUESTED, RETURNING, CLEARED, REGISTERED, VALIDATED,
    FORBIDDEN_POSTGRAD_TRANS)


grok.context(IKofaObject) # Make IKofaObject the default context

# Save function used for save methods in pages
def msave(view, **data):
    changed_fields = view.applyData(view.context, **data)
    # Turn list of lists into single list
    if changed_fields:
        changed_fields = reduce(lambda x,y: x+y, changed_fields.values())
    # Inform catalog if certificate has changed
    # (applyData does this only for the context)
    if 'certificate' in changed_fields:
        notify(grok.ObjectModifiedEvent(view.context.student))
    fields_string = ' + '.join(changed_fields)
    view.flash(_('Form has been saved.'))
    if fields_string:
        view.context.writeLogMessage(view, 'saved: %s' % fields_string)
    return

def emit_lock_message(view):
    """Flash a lock message.
    """
    view.flash(_('The requested form is locked (read-only).'))
    view.redirect(view.url(view.context))
    return

def translated_values(view):
    """Translate course ticket attribute values to be displayed on
    studylevel pages.
    """
    lang = view.request.cookies.get('kofa.language')
    for value in view.context.values():
        # We have to unghostify (according to Tres Seaver) the __dict__
        # by activating the object, otherwise value_dict will be empty
        # when calling the first time.
        value._p_activate()
        value_dict = dict([i for i in value.__dict__.items()])
        value_dict['removable_by_student'] = value.removable_by_student
        value_dict['mandatory'] = translate(str(value.mandatory), 'zope',
            target_language=lang)
        value_dict['carry_over'] = translate(str(value.carry_over), 'zope',
            target_language=lang)
        value_dict['automatic'] = translate(str(value.automatic), 'zope',
            target_language=lang)
        value_dict['grade'] = value.grade
        value_dict['weight'] = value.weight
        yield value_dict

def clearance_disabled_message(student):
    try:
        session_config = grok.getSite()[
            'configuration'][str(student.current_session)]
    except KeyError:
        return _('Session configuration object is not available.')
    if not session_config.clearance_enabled:
        return _('Clearance is disabled for this session.')
    return None


def addCourseTicket(view, course=None):
    students_utils = getUtility(IStudentsUtils)
    ticket = createObject(u'waeup.CourseTicket')
    ticket.automatic = False
    ticket.carry_over = False
    max_credits = students_utils.maxCreditsExceeded(view.context, course)
    if max_credits:
        view.flash(_(
            'Total credits exceed ${a}.',
            mapping = {'a': max_credits}))
        return False
    try:
        view.context.addCourseTicket(ticket, course)
    except KeyError:
        view.flash(_('The ticket exists.'))
        return False
    view.flash(_('Successfully added ${a}.',
        mapping = {'a':ticket.code}))
    view.context.writeLogMessage(
        view,'added: %s|%s|%s' % (
        ticket.code, ticket.level, ticket.level_session))
    return True

class StudentsBreadcrumb(Breadcrumb):
    """A breadcrumb for the students container.
    """
    grok.context(IStudentsContainer)
    title = _('Students')

    @property
    def target(self):
        user = get_current_principal()
        if getattr(user, 'user_type', None) == 'student':
            return None
        return self.viewname

class StudentBreadcrumb(Breadcrumb):
    """A breadcrumb for the student container.
    """
    grok.context(IStudent)

    def title(self):
        return self.context.display_fullname

class SudyCourseBreadcrumb(Breadcrumb):
    """A breadcrumb for the student study course.
    """
    grok.context(IStudentStudyCourse)

    def title(self):
        if self.context.is_current:
            return _('Study Course')
        else:
            return _('Previous Study Course')

class PaymentsBreadcrumb(Breadcrumb):
    """A breadcrumb for the student payments folder.
    """
    grok.context(IStudentPaymentsContainer)
    title = _('Payments')

class OnlinePaymentBreadcrumb(Breadcrumb):
    """A breadcrumb for payments.
    """
    grok.context(IStudentOnlinePayment)

    @property
    def title(self):
        return self.context.p_id

class AccommodationBreadcrumb(Breadcrumb):
    """A breadcrumb for the student accommodation folder.
    """
    grok.context(IStudentAccommodation)
    title = _('Accommodation')

class BedTicketBreadcrumb(Breadcrumb):
    """A breadcrumb for bed tickets.
    """
    grok.context(IBedTicket)

    @property
    def title(self):
        return _('Bed Ticket ${a}',
            mapping = {'a':self.context.getSessionString()})

class StudyLevelBreadcrumb(Breadcrumb):
    """A breadcrumb for course lists.
    """
    grok.context(IStudentStudyLevel)

    @property
    def title(self):
        return self.context.level_title

class StudentsContainerPage(KofaPage):
    """The standard view for student containers.
    """
    grok.context(IStudentsContainer)
    grok.name('index')
    grok.require('waeup.viewStudentsContainer')
    grok.template('containerpage')
    label = _('Student Section')
    search_button = _('Search')
    pnav = 4

    def update(self, *args, **kw):
        datatable.need()
        form = self.request.form
        self.hitlist = []
        if form.get('searchtype', None) == 'suspended':
            self.searchtype = form['searchtype']
            self.searchterm = None
        elif 'searchterm' in form and form['searchterm']:
            self.searchterm = form['searchterm']
            self.searchtype = form['searchtype']
        elif 'old_searchterm' in form:
            self.searchterm = form['old_searchterm']
            self.searchtype = form['old_searchtype']
        else:
            if 'search' in form:
                self.flash(_('Empty search string'))
            return
        if self.searchtype == 'current_session':
            try:
                self.searchterm = int(self.searchterm)
            except ValueError:
                self.flash(_('Only year dates allowed (e.g. 2011).'))
                return
        self.hitlist = search(query=self.searchterm,
            searchtype=self.searchtype, view=self)
        if not self.hitlist:
            self.flash(_('No student found.'))
        return

class StudentsContainerManagePage(KofaPage):
    """The manage page for student containers.
    """
    grok.context(IStudentsContainer)
    grok.name('manage')
    grok.require('waeup.manageStudent')
    grok.template('containermanagepage')
    pnav = 4
    label = _('Manage student section')
    search_button = _('Search')
    remove_button = _('Remove selected')

    def update(self, *args, **kw):
        datatable.need()
        toggleall.need()
        warning.need()
        form = self.request.form
        self.hitlist = []
        if form.get('searchtype', None) == 'suspended':
            self.searchtype = form['searchtype']
            self.searchterm = None
        elif 'searchterm' in form and form['searchterm']:
            self.searchterm = form['searchterm']
            self.searchtype = form['searchtype']
        elif 'old_searchterm' in form:
            self.searchterm = form['old_searchterm']
            self.searchtype = form['old_searchtype']
        else:
            if 'search' in form:
                self.flash(_('Empty search string'))
            return
        if self.searchtype == 'current_session':
            try:
                self.searchterm = int(self.searchterm)
            except ValueError:
                self.flash('Only year dates allowed (e.g. 2011).')
                return
        if not 'entries' in form:
            self.hitlist = search(query=self.searchterm,
                searchtype=self.searchtype, view=self)
            if not self.hitlist:
                self.flash(_('No student found.'))
            if 'remove' in form:
                self.flash(_('No item selected.'))
            return
        entries = form['entries']
        if isinstance(entries, basestring):
            entries = [entries]
        deleted = []
        for entry in entries:
            if 'remove' in form:
                del self.context[entry]
                deleted.append(entry)
        self.hitlist = search(query=self.searchterm,
            searchtype=self.searchtype, view=self)
        if len(deleted):
            self.flash(_('Successfully removed: ${a}',
                mapping = {'a':', '.join(deleted)}))
        return

class StudentAddFormPage(KofaAddFormPage):
    """Add-form to add a student.
    """
    grok.context(IStudentsContainer)
    grok.require('waeup.manageStudent')
    grok.name('addstudent')
    form_fields = grok.AutoFields(IStudent).select(
        'firstname', 'middlename', 'lastname', 'reg_number')
    label = _('Add student')
    pnav = 4

    @action(_('Create student record'), style='primary')
    def addStudent(self, **data):
        student = createObject(u'waeup.Student')
        self.applyData(student, **data)
        self.context.addStudent(student)
        self.flash(_('Student record created.'))
        self.redirect(self.url(self.context[student.student_id], 'index'))
        return

class LoginAsStudentStep1(KofaEditFormPage):
    """ View to temporarily set a student password.
    """
    grok.context(IStudent)
    grok.name('loginasstep1')
    grok.require('waeup.loginAsStudent')
    grok.template('loginasstep1')
    pnav = 4

    def label(self):
        return _(u'Set temporary password for ${a}',
            mapping = {'a':self.context.display_fullname})

    @action('Set password now', style='primary')
    def setPassword(self, *args, **data):
        kofa_utils = getUtility(IKofaUtils)
        password = kofa_utils.genPassword()
        self.context.setTempPassword(self.request.principal.id, password)
        self.context.writeLogMessage(
            self, 'temp_password generated: %s' % password)
        args = {'password':password}
        self.redirect(self.url(self.context) +
            '/loginasstep2?%s' % urlencode(args))
        return

class LoginAsStudentStep2(KofaPage):
    """ View to temporarily login as student with a temporary password.
    """
    grok.context(IStudent)
    grok.name('loginasstep2')
    grok.require('waeup.Public')
    grok.template('loginasstep2')
    login_button = _('Login now')
    pnav = 4

    def label(self):
        return _(u'Login as ${a}',
            mapping = {'a':self.context.student_id})

    def update(self, SUBMIT=None, password=None):
        self.password = password
        if SUBMIT is not None:
            self.flash(_('You successfully logged in as student.'))
            self.redirect(self.url(self.context))
        return

class StudentBaseDisplayFormPage(KofaDisplayFormPage):
    """ Page to display student base data
    """
    grok.context(IStudent)
    grok.name('index')
    grok.require('waeup.viewStudent')
    grok.template('basepage')
    form_fields = grok.AutoFields(IStudentBase).omit(
        'password', 'suspended', 'suspended_comment')
    pnav = 4

    @property
    def label(self):
        if self.context.suspended:
            return _('${a}: Base Data (account deactivated)',
                mapping = {'a':self.context.display_fullname})
        return  _('${a}: Base Data',
            mapping = {'a':self.context.display_fullname})

    @property
    def hasPassword(self):
        if self.context.password:
            return _('set')
        return _('unset')

class StudentBasePDFFormPage(KofaDisplayFormPage):
    """ Page to display student base data in pdf files.
    """

    def __init__(self, context, request, omit_fields):
        self.omit_fields = omit_fields
        super(StudentBasePDFFormPage, self).__init__(context, request)

    @property
    def form_fields(self):
        form_fields = grok.AutoFields(IStudentBase)
        for field in self.omit_fields:
            form_fields = form_fields.omit(field)
        return form_fields

class ContactStudentForm(ContactAdminForm):
    grok.context(IStudent)
    grok.name('contactstudent')
    grok.require('waeup.viewStudent')
    pnav = 4
    form_fields = grok.AutoFields(IContactForm).select('subject', 'body')

    def update(self, subject=u'', body=u''):
        super(ContactStudentForm, self).update()
        self.form_fields.get('subject').field.default = subject
        self.form_fields.get('body').field.default = body
        return

    def label(self):
        return _(u'Send message to ${a}',
            mapping = {'a':self.context.display_fullname})

    @action('Send message now', style='primary')
    def send(self, *args, **data):
        try:
            email = self.request.principal.email
        except AttributeError:
            email = self.config.email_admin
        usertype = getattr(self.request.principal,
                           'user_type', 'system').title()
        kofa_utils = getUtility(IKofaUtils)
        success = kofa_utils.sendContactForm(
                self.request.principal.title,email,
                self.context.display_fullname,self.context.email,
                self.request.principal.id,usertype,
                self.config.name,
                data['body'],data['subject'])
        if success:
            self.flash(_('Your message has been sent.'))
        else:
            self.flash(_('An smtp server error occurred.'))
        return

class ExportPDFAdmissionSlipPage(UtilityView, grok.View):
    """Deliver a PDF Admission slip.
    """
    grok.context(IStudent)
    grok.name('admission_slip.pdf')
    grok.require('waeup.viewStudent')
    prefix = 'form'

    form_fields = grok.AutoFields(IStudentBase).select('student_id', 'reg_number')

    @property
    def label(self):
        portal_language = getUtility(IKofaUtils).PORTAL_LANGUAGE
        return translate(_('Admission Letter of'),
            'waeup.kofa', target_language=portal_language) \
            + ' %s' % self.context.display_fullname

    def render(self):
        students_utils = getUtility(IStudentsUtils)
        return students_utils.renderPDFAdmissionLetter(self,
            self.context.student)

class StudentBaseManageFormPage(KofaEditFormPage):
    """ View to manage student base data
    """
    grok.context(IStudent)
    grok.name('manage_base')
    grok.require('waeup.manageStudent')
    form_fields = grok.AutoFields(IStudentBase).omit(
        'student_id', 'adm_code', 'suspended')
    grok.template('basemanagepage')
    label = _('Manage base data')
    pnav = 4

    def update(self):
        datepicker.need() # Enable jQuery datepicker in date fields.
        tabs.need()
        self.tab1 = self.tab2 = ''
        qs = self.request.get('QUERY_STRING', '')
        if not qs:
            qs = 'tab1'
        setattr(self, qs, 'active')
        super(StudentBaseManageFormPage, self).update()
        self.wf_info = IWorkflowInfo(self.context)
        return

    @action(_('Save'), style='primary')
    def save(self, **data):
        form = self.request.form
        password = form.get('password', None)
        password_ctl = form.get('control_password', None)
        if password:
            validator = getUtility(IPasswordValidator)
            errors = validator.validate_password(password, password_ctl)
            if errors:
                self.flash( ' '.join(errors))
                return
        changed_fields = self.applyData(self.context, **data)
        # Turn list of lists into single list
        if changed_fields:
            changed_fields = reduce(lambda x,y: x+y, changed_fields.values())
        else:
            changed_fields = []
        if password:
            # Now we know that the form has no errors and can set password
            IUserAccount(self.context).setPassword(password)
            changed_fields.append('password')
        fields_string = ' + '.join(changed_fields)
        self.flash(_('Form has been saved.'))
        if fields_string:
            self.context.writeLogMessage(self, 'saved: % s' % fields_string)
        return

class StudentTriggerTransitionFormPage(KofaEditFormPage):
    """ View to manage student base data
    """
    grok.context(IStudent)
    grok.name('trigtrans')
    grok.require('waeup.triggerTransition')
    grok.template('trigtrans')
    label = _('Trigger registration transition')
    pnav = 4

    def getTransitions(self):
        """Return a list of dicts of allowed transition ids and titles.

        Each list entry provides keys ``name`` and ``title`` for
        internal name and (human readable) title of a single
        transition.
        """
        wf_info = IWorkflowInfo(self.context)
        allowed_transitions = [t for t in wf_info.getManualTransitions()
            if not t[0].startswith('pay')]
        if self.context.is_postgrad:
            allowed_transitions = [t for t in allowed_transitions
                if not t[0] in FORBIDDEN_POSTGRAD_TRANS]
        return [dict(name='', title=_('No transition'))] +[
            dict(name=x, title=y) for x, y in allowed_transitions]

    @action(_('Save'), style='primary')
    def save(self, **data):
        form = self.request.form
        if 'transition' in form and form['transition']:
            transition_id = form['transition']
            wf_info = IWorkflowInfo(self.context)
            wf_info.fireTransition(transition_id)
        return

class StudentActivatePage(UtilityView, grok.View):
    """ Activate student account
    """
    grok.context(IStudent)
    grok.name('activate')
    grok.require('waeup.manageStudent')

    def update(self):
        self.context.suspended = False
        self.context.writeLogMessage(self, 'account activated')
        history = IObjectHistory(self.context)
        history.addMessage('Student account activated')
        self.flash(_('Student account has been activated.'))
        self.redirect(self.url(self.context))
        return

    def render(self):
        return

class StudentDeactivatePage(UtilityView, grok.View):
    """ Deactivate student account
    """
    grok.context(IStudent)
    grok.name('deactivate')
    grok.require('waeup.manageStudent')

    def update(self):
        self.context.suspended = True
        self.context.writeLogMessage(self, 'account deactivated')
        history = IObjectHistory(self.context)
        history.addMessage('Student account deactivated')
        self.flash(_('Student account has been deactivated.'))
        self.redirect(self.url(self.context))
        return

    def render(self):
        return

class StudentClearanceDisplayFormPage(KofaDisplayFormPage):
    """ Page to display student clearance data
    """
    grok.context(IStudent)
    grok.name('view_clearance')
    grok.require('waeup.viewStudent')
    pnav = 4

    @property
    def separators(self):
        return getUtility(IStudentsUtils).SEPARATORS_DICT

    @property
    def form_fields(self):
        if self.context.is_postgrad:
            form_fields = grok.AutoFields(
                IPGStudentClearance).omit('clearance_locked')
        else:
            form_fields = grok.AutoFields(
                IUGStudentClearance).omit('clearance_locked')
        if not getattr(self.context, 'officer_comment'):
            form_fields = form_fields.omit('officer_comment')
        else:
            form_fields['officer_comment'].custom_widget = BytesDisplayWidget
        return form_fields

    @property
    def label(self):
        return _('${a}: Clearance Data',
            mapping = {'a':self.context.display_fullname})

class ExportPDFClearanceSlipPage(grok.View):
    """Deliver a PDF slip of the context.
    """
    grok.context(IStudent)
    grok.name('clearance_slip.pdf')
    grok.require('waeup.viewStudent')
    prefix = 'form'
    omit_fields = (
        'password', 'suspended', 'phone',
        'adm_code', 'suspended_comment')

    @property
    def form_fields(self):
        if self.context.is_postgrad:
            form_fields = grok.AutoFields(
                IPGStudentClearance).omit('clearance_locked')
        else:
            form_fields = grok.AutoFields(
                IUGStudentClearance).omit('clearance_locked')
        if not getattr(self.context, 'officer_comment'):
            form_fields = form_fields.omit('officer_comment')
        return form_fields

    @property
    def title(self):
        portal_language = getUtility(IKofaUtils).PORTAL_LANGUAGE
        return translate(_('Clearance Data'), 'waeup.kofa',
            target_language=portal_language)

    @property
    def label(self):
        portal_language = getUtility(IKofaUtils).PORTAL_LANGUAGE
        return translate(_('Clearance Slip of'),
            'waeup.kofa', target_language=portal_language) \
            + ' %s' % self.context.display_fullname

    # XXX: not used in waeup.kofa and thus not tested
    def _signatures(self):
        isStudent = getattr(
            self.request.principal, 'user_type', None) == 'student'
        if not isStudent and self.context.state in (CLEARED, ):
            return ([_('Student Signature')],
                    [_('Clearance Officer Signature')])
        return

    def _sigsInFooter(self):
        isStudent = getattr(
            self.request.principal, 'user_type', None) == 'student'
        if not isStudent and self.context.state in (CLEARED, ):
            return (_('Date, Student Signature'),
                    _('Date, Clearance Officer Signature'),
                    )
        return ()

    def render(self):
        studentview = StudentBasePDFFormPage(self.context.student,
            self.request, self.omit_fields)
        students_utils = getUtility(IStudentsUtils)
        return students_utils.renderPDF(
            self, 'clearance_slip.pdf',
            self.context.student, studentview, signatures=self._signatures(),
            sigs_in_footer=self._sigsInFooter())

class StudentClearanceManageFormPage(KofaEditFormPage):
    """ Page to manage student clearance data
    """
    grok.context(IStudent)
    grok.name('manage_clearance')
    grok.require('waeup.manageStudent')
    grok.template('clearanceeditpage')
    label = _('Manage clearance data')
    pnav = 4

    @property
    def separators(self):
        return getUtility(IStudentsUtils).SEPARATORS_DICT

    @property
    def form_fields(self):
        if self.context.is_postgrad:
            form_fields = grok.AutoFields(IPGStudentClearance).omit('clr_code')
        else:
            form_fields = grok.AutoFields(IUGStudentClearance).omit('clr_code')
        return form_fields

    def update(self):
        datepicker.need() # Enable jQuery datepicker in date fields.
        tabs.need()
        self.tab1 = self.tab2 = ''
        qs = self.request.get('QUERY_STRING', '')
        if not qs:
            qs = 'tab1'
        setattr(self, qs, 'active')
        return super(StudentClearanceManageFormPage, self).update()

    @action(_('Save'), style='primary')
    def save(self, **data):
        msave(self, **data)
        return

class StudentClearPage(UtilityView, grok.View):
    """ Clear student by clearance officer
    """
    grok.context(IStudent)
    grok.name('clear')
    grok.require('waeup.clearStudent')

    def update(self):
        if clearance_disabled_message(self.context):
            self.flash(clearance_disabled_message(self.context))
            self.redirect(self.url(self.context,'view_clearance'))
            return
        if self.context.state == REQUESTED:
            IWorkflowInfo(self.context).fireTransition('clear')
            self.flash(_('Student has been cleared.'))
        else:
            self.flash(_('Student is in wrong state.'))
        self.redirect(self.url(self.context,'view_clearance'))
        return

    def render(self):
        return

class StudentRejectClearancePage(KofaEditFormPage):
    """ Reject clearance by clearance officers
    """
    grok.context(IStudent)
    grok.name('reject_clearance')
    label = _('Reject clearance')
    grok.require('waeup.clearStudent')
    form_fields = grok.AutoFields(
        IUGStudentClearance).select('officer_comment')

    def update(self):
        if clearance_disabled_message(self.context):
            self.flash(clearance_disabled_message(self.context))
            self.redirect(self.url(self.context,'view_clearance'))
            return
        return super(StudentRejectClearancePage, self).update()

    @action(_('Save comment and reject clearance now'), style='primary')
    def reject(self, **data):
        if self.context.state == CLEARED:
            IWorkflowInfo(self.context).fireTransition('reset4')
            message = _('Clearance has been annulled.')
            self.flash(message)
        elif self.context.state == REQUESTED:
            IWorkflowInfo(self.context).fireTransition('reset3')
            message = _('Clearance request has been rejected.')
            self.flash(message)
        else:
            self.flash(_('Student is in wrong state.'))
            self.redirect(self.url(self.context,'view_clearance'))
            return
        self.applyData(self.context, **data)
        comment = data['officer_comment']
        if comment:
            self.context.writeLogMessage(
                self, 'comment: %s' % comment.replace('\n', '<br>'))
            args = {'subject':message, 'body':comment}
        else:
            args = {'subject':message,}
        self.redirect(self.url(self.context) +
            '/contactstudent?%s' % urlencode(args))
        return


class StudentPersonalDisplayFormPage(KofaDisplayFormPage):
    """ Page to display student personal data
    """
    grok.context(IStudent)
    grok.name('view_personal')
    grok.require('waeup.viewStudent')
    form_fields = grok.AutoFields(IStudentPersonal)
    form_fields['perm_address'].custom_widget = BytesDisplayWidget
    form_fields[
        'personal_updated'].custom_widget = FriendlyDatetimeDisplayWidget('le')
    pnav = 4

    @property
    def label(self):
        return _('${a}: Personal Data',
            mapping = {'a':self.context.display_fullname})

class StudentPersonalManageFormPage(KofaEditFormPage):
    """ Page to manage personal data
    """
    grok.context(IStudent)
    grok.name('manage_personal')
    grok.require('waeup.manageStudent')
    form_fields = grok.AutoFields(IStudentPersonal)
    form_fields['personal_updated'].for_display = True
    form_fields[
        'personal_updated'].custom_widget = FriendlyDatetimeDisplayWidget('le')
    label = _('Manage personal data')
    pnav = 4

    @action(_('Save'), style='primary')
    def save(self, **data):
        msave(self, **data)
        return

class StudentPersonalEditFormPage(KofaEditFormPage):
    """ Page to edit personal data
    """
    grok.context(IStudent)
    grok.name('edit_personal')
    grok.require('waeup.handleStudent')
    form_fields = grok.AutoFields(IStudentPersonalEdit).omit('personal_updated')
    label = _('Edit personal data')
    pnav = 4

    @action(_('Save/Confirm'), style='primary')
    def save(self, **data):
        msave(self, **data)
        self.context.personal_updated = datetime.utcnow()
        return

class StudyCourseDisplayFormPage(KofaDisplayFormPage):
    """ Page to display the student study course data
    """
    grok.context(IStudentStudyCourse)
    grok.name('index')
    grok.require('waeup.viewStudent')
    grok.template('studycoursepage')
    pnav = 4

    @property
    def form_fields(self):
        if self.context.is_postgrad:
            form_fields = grok.AutoFields(IStudentStudyCourse).omit(
                'previous_verdict')
        else:
            form_fields = grok.AutoFields(IStudentStudyCourse)
        return form_fields

    @property
    def label(self):
        if self.context.is_current:
            return _('${a}: Study Course',
                mapping = {'a':self.context.__parent__.display_fullname})
        else:
            return _('${a}: Previous Study Course',
                mapping = {'a':self.context.__parent__.display_fullname})

    @property
    def current_mode(self):
        if self.context.certificate is not None:
            studymodes_dict = getUtility(IKofaUtils).STUDY_MODES_DICT
            return studymodes_dict[self.context.certificate.study_mode]
        return

    @property
    def department(self):
        if self.context.certificate is not None:
            return self.context.certificate.__parent__.__parent__
        return

    @property
    def faculty(self):
        if self.context.certificate is not None:
            return self.context.certificate.__parent__.__parent__.__parent__
        return

    @property
    def prev_studycourses(self):
        if self.context.is_current:
            if self.context.__parent__.get('studycourse_2', None) is not None:
                return (
                        {'href':self.url(self.context.student) + '/studycourse_1',
                        'title':_('First Study Course, ')},
                        {'href':self.url(self.context.student) + '/studycourse_2',
                        'title':_('Second Study Course')}
                        )
            if self.context.__parent__.get('studycourse_1', None) is not None:
                return (
                        {'href':self.url(self.context.student) + '/studycourse_1',
                        'title':_('First Study Course')},
                        )
        return

class StudyCourseManageFormPage(KofaEditFormPage):
    """ Page to edit the student study course data
    """
    grok.context(IStudentStudyCourse)
    grok.name('manage')
    grok.require('waeup.manageStudent')
    grok.template('studycoursemanagepage')
    label = _('Manage study course')
    pnav = 4
    taboneactions = [_('Save'),_('Cancel')]
    tabtwoactions = [_('Remove selected levels'),_('Cancel')]
    tabthreeactions = [_('Add study level')]

    @property
    def form_fields(self):
        if self.context.is_postgrad:
            form_fields = grok.AutoFields(IStudentStudyCourse).omit(
                'previous_verdict')
        else:
            form_fields = grok.AutoFields(IStudentStudyCourse)
        return form_fields

    def update(self):
        if not self.context.is_current:
            emit_lock_message(self)
            return
        super(StudyCourseManageFormPage, self).update()
        tabs.need()
        self.tab1 = self.tab2 = ''
        qs = self.request.get('QUERY_STRING', '')
        if not qs:
            qs = 'tab1'
        setattr(self, qs, 'active')
        warning.need()
        datatable.need()
        return

    @action(_('Save'), style='primary')
    def save(self, **data):
        try:
            msave(self, **data)
        except ConstraintNotSatisfied:
            # The selected level might not exist in certificate
            self.flash(_('Current level not available for certificate.'))
            return
        notify(grok.ObjectModifiedEvent(self.context.__parent__))
        return

    @property
    def level_dict(self):
        studylevelsource = StudyLevelSource().factory
        for code in studylevelsource.getValues(self.context):
            title = studylevelsource.getTitle(self.context, code)
            yield(dict(code=code, title=title))

    @property
    def session_dict(self):
        yield(dict(code='', title='--'))
        for item in academic_sessions():
            code = item[1]
            title = item[0]
            yield(dict(code=code, title=title))

    @action(_('Add study level'))
    def addStudyLevel(self, **data):
        level_code = self.request.form.get('addlevel', None)
        level_session = self.request.form.get('level_session', None)
        if not level_session:
            self.flash(_('You must select a session for the level.'))
            self.redirect(self.url(self.context, u'@@manage')+'?tab2')
            return
        studylevel = createObject(u'waeup.StudentStudyLevel')
        studylevel.level = int(level_code)
        studylevel.level_session = int(level_session)
        try:
            self.context.addStudentStudyLevel(
                self.context.certificate,studylevel)
            self.flash(_('Study level has been added.'))
        except KeyError:
            self.flash(_('This level exists.'))
        self.redirect(self.url(self.context, u'@@manage')+'?tab2')
        return

    @jsaction(_('Remove selected levels'))
    def delStudyLevels(self, **data):
        form = self.request.form
        if 'val_id' in form:
            child_id = form['val_id']
        else:
            self.flash(_('No study level selected.'))
            self.redirect(self.url(self.context, '@@manage')+'?tab2')
            return
        if not isinstance(child_id, list):
            child_id = [child_id]
        deleted = []
        for id in child_id:
            del self.context[id]
            deleted.append(id)
        if len(deleted):
            self.flash(_('Successfully removed: ${a}',
                mapping = {'a':', '.join(deleted)}))
            self.context.writeLogMessage(
                self,'removed: %s' % ', '.join(deleted))
        self.redirect(self.url(self.context, u'@@manage')+'?tab2')
        return

class StudentTransferFormPage(KofaAddFormPage):
    """Page to transfer the student.
    """
    grok.context(IStudent)
    grok.name('transfer')
    grok.require('waeup.manageStudent')
    label = _('Transfer student')
    form_fields = grok.AutoFields(IStudentStudyCourseTransfer).omit(
        'entry_mode', 'entry_session')
    pnav = 4

    def update(self):
        super(StudentTransferFormPage, self).update()
        warning.need()
        return

    @jsaction(_('Transfer'))
    def transferStudent(self, **data):
        error = self.context.transfer(**data)
        if error == -1:
            self.flash(_('Current level does not match certificate levels.'))
        elif error == -2:
            self.flash(_('Former study course record incomplete.'))
        elif error == -3:
            self.flash(_('Maximum number of transfers exceeded.'))
        else:
            self.flash(_('Successfully transferred.'))
        return

class RevertTransferFormPage(KofaEditFormPage):
    """View that reverts the previous transfer.
    """
    grok.context(IStudent)
    grok.name('revert_transfer')
    grok.require('waeup.manageStudent')
    grok.template('reverttransfer')
    label = _('Revert previous transfer')

    def update(self):
        warning.need()
        if not self.context.has_key('studycourse_1'):
            self.flash(_('No previous transfer.'))
            self.redirect(self.url(self.context))
            return
        return

    @jsaction(_('Revert now'))
    def transferStudent(self, **data):
        self.context.revert_transfer()
        self.flash(_('Previous transfer reverted.'))
        self.redirect(self.url(self.context, 'studycourse'))
        return

class StudyLevelDisplayFormPage(KofaDisplayFormPage):
    """ Page to display student study levels
    """
    grok.context(IStudentStudyLevel)
    grok.name('index')
    grok.require('waeup.viewStudent')
    form_fields = grok.AutoFields(IStudentStudyLevel)
    form_fields[
        'validation_date'].custom_widget = FriendlyDatetimeDisplayWidget('le')
    grok.template('studylevelpage')
    pnav = 4

    def update(self):
        super(StudyLevelDisplayFormPage, self).update()
        datatable.need()
        return

    @property
    def translated_values(self):
        return translated_values(self)

    @property
    def label(self):
        # Here we know that the cookie has been set
        lang = self.request.cookies.get('kofa.language')
        level_title = translate(self.context.level_title, 'waeup.kofa',
            target_language=lang)
        return _('${a}: Study Level ${b}', mapping = {
            'a':self.context.student.display_fullname,
            'b':level_title})

class ExportPDFCourseRegistrationSlipPage(UtilityView, grok.View):
    """Deliver a PDF slip of the context.
    """
    grok.context(IStudentStudyLevel)
    grok.name('course_registration_slip.pdf')
    grok.require('waeup.viewStudent')
    form_fields = grok.AutoFields(IStudentStudyLevel)
    form_fields[
        'validation_date'].custom_widget = FriendlyDatetimeDisplayWidget('le')
    prefix = 'form'
    omit_fields = (
        'password', 'suspended', 'phone',
        'adm_code', 'sex', 'suspended_comment')

    @property
    def title(self):
        portal_language = getUtility(IKofaUtils).PORTAL_LANGUAGE
        return translate(_('Level Data'), 'waeup.kofa',
            target_language=portal_language)

    @property
    def content_title_1(self):
        portal_language = getUtility(IKofaUtils).PORTAL_LANGUAGE
        return translate(_('1st Semester Courses'), 'waeup.kofa',
            target_language=portal_language)

    @property
    def content_title_2(self):
        portal_language = getUtility(IKofaUtils).PORTAL_LANGUAGE
        return translate(_('2nd Semester Courses'), 'waeup.kofa',
            target_language=portal_language)

    @property
    def content_title_3(self):
        portal_language = getUtility(IKofaUtils).PORTAL_LANGUAGE
        return translate(_('Level Courses'), 'waeup.kofa',
            target_language=portal_language)

    @property
    def label(self):
        portal_language = getUtility(IKofaUtils).PORTAL_LANGUAGE
        lang = self.request.cookies.get('kofa.language', portal_language)
        level_title = translate(self.context.level_title, 'waeup.kofa',
            target_language=lang)
        return translate(_('Course Registration Slip'),
            'waeup.kofa', target_language=portal_language) \
            + ' %s' % level_title

    def render(self):
        portal_language = getUtility(IKofaUtils).PORTAL_LANGUAGE
        Sem = translate(_('Sem.'), 'waeup.kofa', target_language=portal_language)
        Code = translate(_('Code'), 'waeup.kofa', target_language=portal_language)
        Title = translate(_('Title'), 'waeup.kofa', target_language=portal_language)
        Dept = translate(_('Dept.'), 'waeup.kofa', target_language=portal_language)
        Faculty = translate(_('Faculty'), 'waeup.kofa', target_language=portal_language)
        Cred = translate(_('Cred.'), 'waeup.kofa', target_language=portal_language)
        #Mand = translate(_('Requ.'), 'waeup.kofa', target_language=portal_language)
        Score = translate(_('Score'), 'waeup.kofa', target_language=portal_language)
        Grade = translate(_('Grade'), 'waeup.kofa', target_language=portal_language)
        studentview = StudentBasePDFFormPage(self.context.student,
            self.request, self.omit_fields)
        students_utils = getUtility(IStudentsUtils)
        tabledata_1 = sorted(
            [value for value in self.context.values() if value.semester == 1],
            key=lambda value: str(value.semester) + value.code)
        tabledata_2 = sorted(
            [value for value in self.context.values() if value.semester == 2],
            key=lambda value: str(value.semester) + value.code)
        tabledata_3 = sorted(
            [value for value in self.context.values() if value.semester == 3],
            key=lambda value: str(value.semester) + value.code)
        tableheader = [(Code,'code', 2.5),
                         (Title,'title', 5),
                         (Dept,'dcode', 1.5), (Faculty,'fcode', 1.5),
                         (Cred, 'credits', 1.5),
                         #(Mand, 'mandatory', 1.5),
                         (Score, 'score', 1.5),
                         (Grade, 'grade', 1.5),
                         #('Auto', 'automatic', 1.5)
                         ]
        return students_utils.renderPDF(
            self, 'course_registration_slip.pdf',
            self.context.student, studentview,
            tableheader_1=tableheader,
            tabledata_1=tabledata_1,
            tableheader_2=tableheader,
            tabledata_2=tabledata_2,
            tableheader_3=tableheader,
            tabledata_3=tabledata_3
            )

class StudyLevelManageFormPage(KofaEditFormPage):
    """ Page to edit the student study level data
    """
    grok.context(IStudentStudyLevel)
    grok.name('manage')
    grok.require('waeup.manageStudent')
    grok.template('studylevelmanagepage')
    form_fields = grok.AutoFields(IStudentStudyLevel).omit(
        'validation_date', 'validated_by', 'total_credits', 'gpa')
    pnav = 4
    taboneactions = [_('Save'),_('Cancel')]
    tabtwoactions = [_('Add course ticket'),
        _('Remove selected tickets'),_('Cancel')]

    def update(self, ADD=None, course=None):
        if not self.context.__parent__.is_current:
            emit_lock_message(self)
            return
        super(StudyLevelManageFormPage, self).update()
        tabs.need()
        self.tab1 = self.tab2 = ''
        qs = self.request.get('QUERY_STRING', '')
        if not qs:
            qs = 'tab1'
        setattr(self, qs, 'active')
        warning.need()
        datatable.need()
        if ADD is not None:
            if not course:
                self.flash(_('No valid course code entered.'))
                self.redirect(self.url(self.context, u'@@manage')+'?tab2')
                return
            cat = queryUtility(ICatalog, name='courses_catalog')
            result = cat.searchResults(code=(course, course))
            if len(result) != 1:
                self.flash(_('Course not found.'))
            else:
                course = list(result)[0]
                addCourseTicket(self, course)
            self.redirect(self.url(self.context, u'@@manage')+'?tab2')
        return

    @property
    def translated_values(self):
        return translated_values(self)

    @property
    def label(self):
        # Here we know that the cookie has been set
        lang = self.request.cookies.get('kofa.language')
        level_title = translate(self.context.level_title, 'waeup.kofa',
            target_language=lang)
        return _('Manage study level ${a}',
            mapping = {'a':level_title})

    @action(_('Save'), style='primary')
    def save(self, **data):
        msave(self, **data)
        return

    @jsaction(_('Remove selected tickets'))
    def delCourseTicket(self, **data):
        form = self.request.form
        if 'val_id' in form:
            child_id = form['val_id']
        else:
            self.flash(_('No ticket selected.'))
            self.redirect(self.url(self.context, '@@manage')+'?tab2')
            return
        if not isinstance(child_id, list):
            child_id = [child_id]
        deleted = []
        for id in child_id:
            del self.context[id]
            deleted.append(id)
        if len(deleted):
            self.flash(_('Successfully removed: ${a}',
                mapping = {'a':', '.join(deleted)}))
            self.context.writeLogMessage(
                self,'removed: %s at %s' %
                (', '.join(deleted), self.context.level))
        self.redirect(self.url(self.context, u'@@manage')+'?tab2')
        return

class ValidateCoursesPage(UtilityView, grok.View):
    """ Validate course list by course adviser
    """
    grok.context(IStudentStudyLevel)
    grok.name('validate_courses')
    grok.require('waeup.validateStudent')

    def update(self):
        if not self.context.__parent__.is_current:
            emit_lock_message(self)
            return
        if str(self.context.__parent__.current_level) != self.context.__name__:
            self.flash(_('This level does not correspond current level.'))
        elif self.context.student.state == REGISTERED:
            IWorkflowInfo(self.context.student).fireTransition(
                'validate_courses')
            self.flash(_('Course list has been validated.'))
        else:
            self.flash(_('Student is in the wrong state.'))
        self.redirect(self.url(self.context))
        return

    def render(self):
        return

class RejectCoursesPage(UtilityView, grok.View):
    """ Reject course list by course adviser
    """
    grok.context(IStudentStudyLevel)
    grok.name('reject_courses')
    grok.require('waeup.validateStudent')

    def update(self):
        if not self.context.__parent__.is_current:
            emit_lock_message(self)
            return
        if str(self.context.__parent__.current_level) != self.context.__name__:
            self.flash(_('This level does not correspond current level.'))
            self.redirect(self.url(self.context))
            return
        elif self.context.student.state == VALIDATED:
            IWorkflowInfo(self.context.student).fireTransition('reset8')
            message = _('Course list request has been annulled.')
            self.flash(message)
        elif self.context.student.state == REGISTERED:
            IWorkflowInfo(self.context.student).fireTransition('reset7')
            message = _('Course list request has been rejected:')
            self.flash(message)
        else:
            self.flash(_('Student is in the wrong state.'))
            self.redirect(self.url(self.context))
            return
        args = {'subject':message}
        self.redirect(self.url(self.context.student) +
            '/contactstudent?%s' % urlencode(args))
        return

    def render(self):
        return

class CourseTicketAddFormPage(KofaAddFormPage):
    """Add a course ticket.
    """
    grok.context(IStudentStudyLevel)
    grok.name('add')
    grok.require('waeup.manageStudent')
    label = _('Add course ticket')
    form_fields = grok.AutoFields(ICourseTicketAdd)
    pnav = 4

    def update(self):
        if not self.context.__parent__.is_current:
            emit_lock_message(self)
            return
        super(CourseTicketAddFormPage, self).update()
        return

    @action(_('Add course ticket'))
    def addCourseTicket(self, **data):
        course = data['course']
        success = addCourseTicket(self, course)
        if success:
            self.redirect(self.url(self.context, u'@@manage')+'?tab2')
        return

    @action(_('Cancel'), validator=NullValidator)
    def cancel(self, **data):
        self.redirect(self.url(self.context))

class CourseTicketDisplayFormPage(KofaDisplayFormPage):
    """ Page to display course tickets
    """
    grok.context(ICourseTicket)
    grok.name('index')
    grok.require('waeup.viewStudent')
    form_fields = grok.AutoFields(ICourseTicket)
    grok.template('courseticketpage')
    pnav = 4

    @property
    def label(self):
        return _('${a}: Course Ticket ${b}', mapping = {
            'a':self.context.student.display_fullname,
            'b':self.context.code})

class CourseTicketManageFormPage(KofaEditFormPage):
    """ Page to manage course tickets
    """
    grok.context(ICourseTicket)
    grok.name('manage')
    grok.require('waeup.manageStudent')
    form_fields = grok.AutoFields(ICourseTicket)
    form_fields['title'].for_display = True
    form_fields['fcode'].for_display = True
    form_fields['dcode'].for_display = True
    form_fields['semester'].for_display = True
    form_fields['passmark'].for_display = True
    form_fields['credits'].for_display = True
    form_fields['mandatory'].for_display = False
    form_fields['automatic'].for_display = True
    form_fields['carry_over'].for_display = True
    pnav = 4
    grok.template('courseticketmanagepage')

    @property
    def label(self):
        return _('Manage course ticket ${a}', mapping = {'a':self.context.code})

    @action('Save', style='primary')
    def save(self, **data):
        msave(self, **data)
        return

class PaymentsManageFormPage(KofaEditFormPage):
    """ Page to manage the student payments

    This manage form page is for both students and students officers.
    """
    grok.context(IStudentPaymentsContainer)
    grok.name('index')
    grok.require('waeup.viewStudent')
    form_fields = grok.AutoFields(IStudentPaymentsContainer)
    grok.template('paymentsmanagepage')
    pnav = 4

    @property
    def manage_payments_allowed(self):
        return checkPermission('waeup.payStudent', self.context)

    def unremovable(self, ticket):
        usertype = getattr(self.request.principal, 'user_type', None)
        if not usertype:
            return False
        if not self.manage_payments_allowed:
            return True
        return (self.request.principal.user_type == 'student' and ticket.r_code)

    @property
    def label(self):
        return _('${a}: Payments',
            mapping = {'a':self.context.__parent__.display_fullname})

    def update(self):
        super(PaymentsManageFormPage, self).update()
        datatable.need()
        warning.need()
        return

    @jsaction(_('Remove selected tickets'))
    def delPaymentTicket(self, **data):
        form = self.request.form
        if 'val_id' in form:
            child_id = form['val_id']
        else:
            self.flash(_('No payment selected.'))
            self.redirect(self.url(self.context))
            return
        if not isinstance(child_id, list):
            child_id = [child_id]
        deleted = []
        for id in child_id:
            # Students are not allowed to remove used payment tickets
            ticket = self.context.get(id, None)
            if ticket is not None and not self.unremovable(ticket):
                del self.context[id]
                deleted.append(id)
        if len(deleted):
            self.flash(_('Successfully removed: ${a}',
                mapping = {'a': ', '.join(deleted)}))
            self.context.writeLogMessage(
                self,'removed: %s' % ', '.join(deleted))
        self.redirect(self.url(self.context))
        return

    #@action(_('Add online payment ticket'))
    #def addPaymentTicket(self, **data):
    #    self.redirect(self.url(self.context, '@@addop'))

class OnlinePaymentAddFormPage(KofaAddFormPage):
    """ Page to add an online payment ticket
    """
    grok.context(IStudentPaymentsContainer)
    grok.name('addop')
    grok.template('onlinepaymentaddform')
    grok.require('waeup.payStudent')
    form_fields = grok.AutoFields(IStudentOnlinePayment).select(
        'p_category')
    label = _('Add online payment')
    pnav = 4

    @property
    def selectable_categories(self):
        categories = getUtility(IKofaUtils).SELECTABLE_PAYMENT_CATEGORIES
        return sorted(categories.items())

    @action(_('Create ticket'), style='primary')
    def createTicket(self, **data):
        p_category = data['p_category']
        previous_session = data.get('p_session', None)
        previous_level = data.get('p_level', None)
        student = self.context.__parent__
        if p_category == 'bed_allocation' and student[
            'studycourse'].current_session != grok.getSite()[
            'hostels'].accommodation_session:
                self.flash(
                    _('Your current session does not match ' + \
                    'accommodation session.'))
                return
        if 'maintenance' in p_category:
            current_session = str(student['studycourse'].current_session)
            if not current_session in student['accommodation']:
                self.flash(_('You have not yet booked accommodation.'))
                return
        students_utils = getUtility(IStudentsUtils)
        error, payment = students_utils.setPaymentDetails(
            p_category, student, previous_session, previous_level)
        if error is not None:
            self.flash(error)
            return
        self.context[payment.p_id] = payment
        self.flash(_('Payment ticket created.'))
        self.redirect(self.url(self.context))
        return

    @action(_('Cancel'), validator=NullValidator)
    def cancel(self, **data):
        self.redirect(self.url(self.context))

class PreviousPaymentAddFormPage(KofaAddFormPage):
    """ Page to add an online payment ticket for previous sessions
    """
    grok.context(IStudentPaymentsContainer)
    grok.name('addpp')
    grok.require('waeup.payStudent')
    form_fields = grok.AutoFields(IStudentPreviousPayment)
    label = _('Add previous session online payment')
    pnav = 4

    def update(self):
        if self.context.student.before_payment:
            self.flash(_("No previous payment to be made."))
            self.redirect(self.url(self.context))
        super(PreviousPaymentAddFormPage, self).update()
        return

    @action(_('Create ticket'), style='primary')
    def createTicket(self, **data):
        p_category = data['p_category']
        previous_session = data.get('p_session', None)
        previous_level = data.get('p_level', None)
        student = self.context.__parent__
        students_utils = getUtility(IStudentsUtils)
        error, payment = students_utils.setPaymentDetails(
            p_category, student, previous_session, previous_level)
        if error is not None:
            self.flash(error)
            return
        self.context[payment.p_id] = payment
        self.flash(_('Payment ticket created.'))
        self.redirect(self.url(self.context))
        return

    @action(_('Cancel'), validator=NullValidator)
    def cancel(self, **data):
        self.redirect(self.url(self.context))

class BalancePaymentAddFormPage(KofaAddFormPage):
    """ Page to add an online payment ticket for balance sessions
    """
    grok.context(IStudentPaymentsContainer)
    grok.name('addbp')
    grok.require('waeup.manageStudent')
    form_fields = grok.AutoFields(IStudentBalancePayment)
    label = _('Add balance')
    pnav = 4

    @action(_('Create ticket'), style='primary')
    def createTicket(self, **data):
        p_category = data['p_category']
        balance_session = data.get('balance_session', None)
        balance_level = data.get('balance_level', None)
        balance_amount = data.get('balance_amount', None)
        student = self.context.__parent__
        students_utils = getUtility(IStudentsUtils)
        error, payment = students_utils.setBalanceDetails(
            p_category, student, balance_session,
            balance_level, balance_amount)
        if error is not None:
            self.flash(error)
            return
        self.context[payment.p_id] = payment
        self.flash(_('Payment ticket created.'))
        self.redirect(self.url(self.context))
        return

    @action(_('Cancel'), validator=NullValidator)
    def cancel(self, **data):
        self.redirect(self.url(self.context))

class OnlinePaymentDisplayFormPage(KofaDisplayFormPage):
    """ Page to view an online payment ticket
    """
    grok.context(IStudentOnlinePayment)
    grok.name('index')
    grok.require('waeup.viewStudent')
    form_fields = grok.AutoFields(IStudentOnlinePayment).omit('p_item')
    form_fields[
        'creation_date'].custom_widget = FriendlyDatetimeDisplayWidget('le')
    form_fields[
        'payment_date'].custom_widget = FriendlyDatetimeDisplayWidget('le')
    pnav = 4

    @property
    def label(self):
        return _('${a}: Online Payment Ticket ${b}', mapping = {
            'a':self.context.student.display_fullname,
            'b':self.context.p_id})

class OnlinePaymentApprovePage(UtilityView, grok.View):
    """ Callback view
    """
    grok.context(IStudentOnlinePayment)
    grok.name('approve')
    grok.require('waeup.managePortal')

    def update(self):
        success, msg, log = self.context.approveStudentPayment()
        if log is not None:
            # Add log message to students.log
            self.context.writeLogMessage(self,log)
            # Add log message to payments.log
            self.context.logger.info(
                '%s,%s,%s,%s,%s,,,,,,' % (
                self.context.student.student_id,
                self.context.p_id, self.context.p_category,
                self.context.amount_auth, self.context.r_code))
        self.flash(msg)
        return

    def render(self):
        self.redirect(self.url(self.context, '@@index'))
        return

class OnlinePaymentFakeApprovePage(OnlinePaymentApprovePage):
    """ Approval view for students.

    This view is used for browser tests only and
    must be neutralized in custom pages!
    """

    grok.name('fake_approve')
    grok.require('waeup.payStudent')

class ExportPDFPaymentSlipPage(UtilityView, grok.View):
    """Deliver a PDF slip of the context.
    """
    grok.context(IStudentOnlinePayment)
    grok.name('payment_slip.pdf')
    grok.require('waeup.viewStudent')
    form_fields = grok.AutoFields(IStudentOnlinePayment).omit('p_item')
    form_fields['creation_date'].custom_widget = FriendlyDatetimeDisplayWidget('le')
    form_fields['payment_date'].custom_widget = FriendlyDatetimeDisplayWidget('le')
    prefix = 'form'
    note = None
    omit_fields = (
        'password', 'suspended', 'phone',
        'adm_code', 'sex', 'suspended_comment')

    @property
    def title(self):
        portal_language = getUtility(IKofaUtils).PORTAL_LANGUAGE
        return translate(_('Payment Data'), 'waeup.kofa',
            target_language=portal_language)

    @property
    def label(self):
        portal_language = getUtility(IKofaUtils).PORTAL_LANGUAGE
        return translate(_('Online Payment Slip'),
            'waeup.kofa', target_language=portal_language) \
            + ' %s' % self.context.p_id

    def render(self):
        #if self.context.p_state != 'paid':
        #    self.flash('Ticket not yet paid.')
        #    self.redirect(self.url(self.context))
        #    return
        studentview = StudentBasePDFFormPage(self.context.student,
            self.request, self.omit_fields)
        students_utils = getUtility(IStudentsUtils)
        return students_utils.renderPDF(self, 'payment_slip.pdf',
            self.context.student, studentview, note=self.note)


class AccommodationManageFormPage(KofaEditFormPage):
    """ Page to manage bed tickets.

    This manage form page is for both students and students officers.
    """
    grok.context(IStudentAccommodation)
    grok.name('index')
    grok.require('waeup.handleAccommodation')
    form_fields = grok.AutoFields(IStudentAccommodation)
    grok.template('accommodationmanagepage')
    pnav = 4
    officers_only_actions = [_('Remove selected')]

    @property
    def label(self):
        return _('${a}: Accommodation',
            mapping = {'a':self.context.__parent__.display_fullname})

    def update(self):
        super(AccommodationManageFormPage, self).update()
        datatable.need()
        warning.need()
        return

    @jsaction(_('Remove selected'))
    def delBedTickets(self, **data):
        if getattr(self.request.principal, 'user_type', None) == 'student':
            self.flash(_('You are not allowed to remove bed tickets.'))
            self.redirect(self.url(self.context))
            return
        form = self.request.form
        if 'val_id' in form:
            child_id = form['val_id']
        else:
            self.flash(_('No bed ticket selected.'))
            self.redirect(self.url(self.context))
            return
        if not isinstance(child_id, list):
            child_id = [child_id]
        deleted = []
        for id in child_id:
            del self.context[id]
            deleted.append(id)
        if len(deleted):
            self.flash(_('Successfully removed: ${a}',
                mapping = {'a':', '.join(deleted)}))
            self.context.writeLogMessage(
                self,'removed: % s' % ', '.join(deleted))
        self.redirect(self.url(self.context))
        return

    @property
    def selected_actions(self):
        if getattr(self.request.principal, 'user_type', None) == 'student':
            return [action for action in self.actions
                    if not action.label in self.officers_only_actions]
        return self.actions

class BedTicketAddPage(KofaPage):
    """ Page to add an online payment ticket
    """
    grok.context(IStudentAccommodation)
    grok.name('add')
    grok.require('waeup.handleAccommodation')
    grok.template('enterpin')
    ac_prefix = 'HOS'
    label = _('Add bed ticket')
    pnav = 4
    buttonname = _('Create bed ticket')
    notice = ''
    with_ac = True

    def update(self, SUBMIT=None):
        student = self.context.student
        students_utils = getUtility(IStudentsUtils)
        acc_details  = students_utils.getAccommodationDetails(student)
        if acc_details.get('expired', False):
            startdate = acc_details.get('startdate')
            enddate = acc_details.get('enddate')
            if startdate and enddate:
                tz = getUtility(IKofaUtils).tzinfo
                startdate = to_timezone(
                    startdate, tz).strftime("%d/%m/%Y %H:%M:%S")
                enddate = to_timezone(
                    enddate, tz).strftime("%d/%m/%Y %H:%M:%S")
                self.flash(_("Outside booking period: ${a} - ${b}",
                    mapping = {'a': startdate, 'b': enddate}))
            else:
                self.flash(_("Outside booking period."))
            self.redirect(self.url(self.context))
            return
        if not acc_details:
            self.flash(_("Your data are incomplete."))
            self.redirect(self.url(self.context))
            return
        if not student.state in acc_details['allowed_states']:
            self.flash(_("You are in the wrong registration state."))
            self.redirect(self.url(self.context))
            return
        if student['studycourse'].current_session != acc_details[
            'booking_session']:
            self.flash(
                _('Your current session does not match accommodation session.'))
            self.redirect(self.url(self.context))
            return
        if str(acc_details['booking_session']) in self.context.keys():
            self.flash(
                _('You already booked a bed space in current ' \
                    + 'accommodation session.'))
            self.redirect(self.url(self.context))
            return
        if self.with_ac:
            self.ac_series = self.request.form.get('ac_series', None)
            self.ac_number = self.request.form.get('ac_number', None)
        if SUBMIT is None:
            return
        if self.with_ac:
            pin = '%s-%s-%s' % (self.ac_prefix, self.ac_series, self.ac_number)
            code = get_access_code(pin)
            if not code:
                self.flash(_('Activation code is invalid.'))
                return
        # Search and book bed
        cat = queryUtility(ICatalog, name='beds_catalog', default=None)
        entries = cat.searchResults(
            owner=(student.student_id,student.student_id))
        if len(entries):
            # If bed space has been manually allocated use this bed
            bed = [entry for entry in entries][0]
            # Safety belt for paranoids: Does this bed really exist on portal?
            # XXX: Can be remove if nobody complains.
            if bed.__parent__.__parent__ is None:
                self.flash(_('System error: Please contact the adminsitrator.'))
                self.context.writeLogMessage(self, 'fatal error: %s' % bed.bed_id)
                return
        else:
            # else search for other available beds
            entries = cat.searchResults(
                bed_type=(acc_details['bt'],acc_details['bt']))
            available_beds = [
                entry for entry in entries if entry.owner == NOT_OCCUPIED]
            if available_beds:
                students_utils = getUtility(IStudentsUtils)
                bed = students_utils.selectBed(available_beds)
                # Safety belt for paranoids: Does this bed really exist in portal?
                # XXX: Can be remove if nobody complains.
                if bed.__parent__.__parent__ is None:
                    self.flash(_('System error: Please contact the adminsitrator.'))
                    self.context.writeLogMessage(self, 'fatal error: %s' % bed.bed_id)
                    return
                bed.bookBed(student.student_id)
            else:
                self.flash(_('There is no free bed in your category ${a}.',
                    mapping = {'a':acc_details['bt']}))
                return
        if self.with_ac:
            # Mark pin as used (this also fires a pin related transition)
            if code.state == USED:
                self.flash(_('Activation code has already been used.'))
                return
            else:
                comment = _(u'invalidated')
                # Here we know that the ac is in state initialized so we do not
                # expect an exception, but the owner might be different
                if not invalidate_accesscode(
                    pin,comment,self.context.student.student_id):
                    self.flash(_('You are not the owner of this access code.'))
                    return
        # Create bed ticket
        bedticket = createObject(u'waeup.BedTicket')
        if self.with_ac:
            bedticket.booking_code = pin
        bedticket.booking_session = acc_details['booking_session']
        bedticket.bed_type = acc_details['bt']
        bedticket.bed = bed
        hall_title = bed.__parent__.hostel_name
        coordinates = bed.coordinates[1:]
        block, room_nr, bed_nr = coordinates
        bc = _('${a}, Block ${b}, Room ${c}, Bed ${d} (${e})', mapping = {
            'a':hall_title, 'b':block,
            'c':room_nr, 'd':bed_nr,
            'e':bed.bed_type})
        portal_language = getUtility(IKofaUtils).PORTAL_LANGUAGE
        bedticket.bed_coordinates = translate(
            bc, 'waeup.kofa',target_language=portal_language)
        self.context.addBedTicket(bedticket)
        self.context.writeLogMessage(self, 'booked: %s' % bed.bed_id)
        self.flash(_('Bed ticket created and bed booked: ${a}',
            mapping = {'a':bedticket.display_coordinates}))
        self.redirect(self.url(self.context))
        return

class BedTicketDisplayFormPage(KofaDisplayFormPage):
    """ Page to display bed tickets
    """
    grok.context(IBedTicket)
    grok.name('index')
    grok.require('waeup.handleAccommodation')
    form_fields = grok.AutoFields(IBedTicket).omit('bed_coordinates')
    form_fields['booking_date'].custom_widget = FriendlyDatetimeDisplayWidget('le')
    pnav = 4

    @property
    def label(self):
        return _('Bed Ticket for Session ${a}',
            mapping = {'a':self.context.getSessionString()})

class ExportPDFBedTicketSlipPage(UtilityView, grok.View):
    """Deliver a PDF slip of the context.
    """
    grok.context(IBedTicket)
    grok.name('bed_allocation_slip.pdf')
    grok.require('waeup.handleAccommodation')
    form_fields = grok.AutoFields(IBedTicket).omit('bed_coordinates')
    form_fields['booking_date'].custom_widget = FriendlyDatetimeDisplayWidget('le')
    prefix = 'form'
    omit_fields = (
        'password', 'suspended', 'phone', 'adm_code', 'suspended_comment')

    @property
    def title(self):
        portal_language = getUtility(IKofaUtils).PORTAL_LANGUAGE
        return translate(_('Bed Allocation Data'), 'waeup.kofa',
            target_language=portal_language)

    @property
    def label(self):
        portal_language = getUtility(IKofaUtils).PORTAL_LANGUAGE
        #return translate(_('Bed Allocation: '),
        #    'waeup.kofa', target_language=portal_language) \
        #    + ' %s' % self.context.bed_coordinates
        return translate(_('Bed Allocation Slip'),
            'waeup.kofa', target_language=portal_language) \
            + ' %s' % self.context.getSessionString()

    def render(self):
        studentview = StudentBasePDFFormPage(self.context.student,
            self.request, self.omit_fields)
        students_utils = getUtility(IStudentsUtils)
        return students_utils.renderPDF(
            self, 'bed_allocation_slip.pdf',
            self.context.student, studentview)

class BedTicketRelocationPage(UtilityView, grok.View):
    """ Callback view
    """
    grok.context(IBedTicket)
    grok.name('relocate')
    grok.require('waeup.manageHostels')

    # Relocate student if student parameters have changed or the bed_type
    # of the bed has changed
    def update(self):
        student = self.context.student
        students_utils = getUtility(IStudentsUtils)
        acc_details  = students_utils.getAccommodationDetails(student)
        if self.context.bed != None and \
              'reserved' in self.context.bed.bed_type:
            self.flash(_("Students in reserved beds can't be relocated."))
            self.redirect(self.url(self.context))
            return
        if acc_details['bt'] == self.context.bed_type and \
                self.context.bed != None and \
                self.context.bed.bed_type == self.context.bed_type:
            self.flash(_("Student can't be relocated."))
            self.redirect(self.url(self.context))
            return
        # Search a bed
        cat = queryUtility(ICatalog, name='beds_catalog', default=None)
        entries = cat.searchResults(
            owner=(student.student_id,student.student_id))
        if len(entries) and self.context.bed == None:
            # If booking has been cancelled but other bed space has been
            # manually allocated after cancellation use this bed
            new_bed = [entry for entry in entries][0]
        else:
            # Search for other available beds
            entries = cat.searchResults(
                bed_type=(acc_details['bt'],acc_details['bt']))
            available_beds = [
                entry for entry in entries if entry.owner == NOT_OCCUPIED]
            if available_beds:
                students_utils = getUtility(IStudentsUtils)
                new_bed = students_utils.selectBed(available_beds)
                new_bed.bookBed(student.student_id)
            else:
                self.flash(_('There is no free bed in your category ${a}.',
                    mapping = {'a':acc_details['bt']}))
                self.redirect(self.url(self.context))
                return
        # Release old bed if exists
        if self.context.bed != None:
            self.context.bed.owner = NOT_OCCUPIED
            notify(grok.ObjectModifiedEvent(self.context.bed))
        # Alocate new bed
        self.context.bed_type = acc_details['bt']
        self.context.bed = new_bed
        hall_title = new_bed.__parent__.hostel_name
        coordinates = new_bed.coordinates[1:]
        block, room_nr, bed_nr = coordinates
        bc = _('${a}, Block ${b}, Room ${c}, Bed ${d} (${e})', mapping = {
            'a':hall_title, 'b':block,
            'c':room_nr, 'd':bed_nr,
            'e':new_bed.bed_type})
        portal_language = getUtility(IKofaUtils).PORTAL_LANGUAGE
        self.context.bed_coordinates = translate(
            bc, 'waeup.kofa',target_language=portal_language)
        self.context.writeLogMessage(self, 'relocated: %s' % new_bed.bed_id)
        self.flash(_('Student relocated: ${a}',
            mapping = {'a':self.context.display_coordinates}))
        self.redirect(self.url(self.context))
        return

    def render(self):
        return

class StudentHistoryPage(KofaPage):
    """ Page to display student clearance data
    """
    grok.context(IStudent)
    grok.name('history')
    grok.require('waeup.viewStudent')
    grok.template('studenthistory')
    pnav = 4

    @property
    def label(self):
        return _('${a}: History', mapping = {'a':self.context.display_fullname})

# Pages for students only

class StudentBaseEditFormPage(KofaEditFormPage):
    """ View to edit student base data
    """
    grok.context(IStudent)
    grok.name('edit_base')
    grok.require('waeup.handleStudent')
    form_fields = grok.AutoFields(IStudentBase).select(
        'email', 'phone')
    label = _('Edit base data')
    pnav = 4

    @action(_('Save'), style='primary')
    def save(self, **data):
        msave(self, **data)
        return

class StudentChangePasswordPage(KofaEditFormPage):
    """ View to manage student base data
    """
    grok.context(IStudent)
    grok.name('change_password')
    grok.require('waeup.handleStudent')
    grok.template('change_password')
    label = _('Change password')
    pnav = 4

    @action(_('Save'), style='primary')
    def save(self, **data):
        form = self.request.form
        password = form.get('change_password', None)
        password_ctl = form.get('change_password_repeat', None)
        if password:
            validator = getUtility(IPasswordValidator)
            errors = validator.validate_password(password, password_ctl)
            if not errors:
                IUserAccount(self.context).setPassword(password)
                self.context.writeLogMessage(self, 'saved: password')
                self.flash(_('Password changed.'))
            else:
                self.flash( ' '.join(errors))
        return

class StudentFilesUploadPage(KofaPage):
    """ View to upload files by student
    """
    grok.context(IStudent)
    grok.name('change_portrait')
    grok.require('waeup.uploadStudentFile')
    grok.template('filesuploadpage')
    label = _('Upload portrait')
    pnav = 4

    def update(self):
        if self.context.student.state != ADMITTED:
            emit_lock_message(self)
            return
        super(StudentFilesUploadPage, self).update()
        return

class StartClearancePage(KofaPage):
    grok.context(IStudent)
    grok.name('start_clearance')
    grok.require('waeup.handleStudent')
    grok.template('enterpin')
    label = _('Start clearance')
    ac_prefix = 'CLR'
    notice = ''
    pnav = 4
    buttonname = _('Start clearance now')
    with_ac = True

    @property
    def all_required_fields_filled(self):
        if self.context.email and self.context.phone:
            return True
        return False

    @property
    def portrait_uploaded(self):
        store = getUtility(IExtFileStore)
        if store.getFileByContext(self.context, attr=u'passport.jpg'):
            return True
        return False

    def update(self, SUBMIT=None):
        if not self.context.state == ADMITTED:
            self.flash(_("Wrong state"))
            self.redirect(self.url(self.context))
            return
        if not self.portrait_uploaded:
            self.flash(_("No portrait uploaded."))
            self.redirect(self.url(self.context, 'change_portrait'))
            return
        if not self.all_required_fields_filled:
            self.flash(_("Not all required fields filled."))
            self.redirect(self.url(self.context, 'edit_base'))
            return
        if self.with_ac:
            self.ac_series = self.request.form.get('ac_series', None)
            self.ac_number = self.request.form.get('ac_number', None)
        if SUBMIT is None:
            return
        if self.with_ac:
            pin = '%s-%s-%s' % (self.ac_prefix, self.ac_series, self.ac_number)
            code = get_access_code(pin)
            if not code:
                self.flash(_('Activation code is invalid.'))
                return
            if code.state == USED:
                self.flash(_('Activation code has already been used.'))
                return
            # Mark pin as used (this also fires a pin related transition)
            # and fire transition start_clearance
            comment = _(u"invalidated")
            # Here we know that the ac is in state initialized so we do not
            # expect an exception, but the owner might be different
            if not invalidate_accesscode(pin, comment, self.context.student_id):
                self.flash(_('You are not the owner of this access code.'))
                return
            self.context.clr_code = pin
        IWorkflowInfo(self.context).fireTransition('start_clearance')
        self.flash(_('Clearance process has been started.'))
        self.redirect(self.url(self.context,'cedit'))
        return

class StudentClearanceEditFormPage(StudentClearanceManageFormPage):
    """ View to edit student clearance data by student
    """
    grok.context(IStudent)
    grok.name('cedit')
    grok.require('waeup.handleStudent')
    label = _('Edit clearance data')

    @property
    def form_fields(self):
        if self.context.is_postgrad:
            form_fields = grok.AutoFields(IPGStudentClearance).omit(
                'clearance_locked', 'clr_code', 'officer_comment')
        else:
            form_fields = grok.AutoFields(IUGStudentClearance).omit(
                'clearance_locked', 'clr_code', 'officer_comment')
        return form_fields

    def update(self):
        if self.context.clearance_locked:
            emit_lock_message(self)
            return
        return super(StudentClearanceEditFormPage, self).update()

    @action(_('Save'), style='primary')
    def save(self, **data):
        self.applyData(self.context, **data)
        self.flash(_('Clearance form has been saved.'))
        return

    def dataNotComplete(self):
        """To be implemented in the customization package.
        """
        return False

    @action(_('Save and request clearance'), style='primary')
    def requestClearance(self, **data):
        self.applyData(self.context, **data)
        if self.dataNotComplete():
            self.flash(self.dataNotComplete())
            return
        self.flash(_('Clearance form has been saved.'))
        if self.context.clr_code:
            self.redirect(self.url(self.context, 'request_clearance'))
        else:
            # We bypass the request_clearance page if student
            # has been imported in state 'clearance started' and
            # no clr_code was entered before.
            state = IWorkflowState(self.context).getState()
            if state != CLEARANCE:
                # This shouldn't happen, but the application officer
                # might have forgotten to lock the form after changing the state
                self.flash(_('This form cannot be submitted. Wrong state!'))
                return
            IWorkflowInfo(self.context).fireTransition('request_clearance')
            self.flash(_('Clearance has been requested.'))
            self.redirect(self.url(self.context))
        return

class RequestClearancePage(KofaPage):
    grok.context(IStudent)
    grok.name('request_clearance')
    grok.require('waeup.handleStudent')
    grok.template('enterpin')
    label = _('Request clearance')
    notice = _('Enter the CLR access code used for starting clearance.')
    ac_prefix = 'CLR'
    pnav = 4
    buttonname = _('Request clearance now')
    with_ac = True

    def update(self, SUBMIT=None):
        if self.with_ac:
            self.ac_series = self.request.form.get('ac_series', None)
            self.ac_number = self.request.form.get('ac_number', None)
        if SUBMIT is None:
            return
        if self.with_ac:
            pin = '%s-%s-%s' % (self.ac_prefix, self.ac_series, self.ac_number)
            if self.context.clr_code and self.context.clr_code != pin:
                self.flash(_("This isn't your CLR access code."))
                return
        state = IWorkflowState(self.context).getState()
        if state != CLEARANCE:
            # This shouldn't happen, but the application officer
            # might have forgotten to lock the form after changing the state
            self.flash(_('This form cannot be submitted. Wrong state!'))
            return
        IWorkflowInfo(self.context).fireTransition('request_clearance')
        self.flash(_('Clearance has been requested.'))
        self.redirect(self.url(self.context))
        return

class StartSessionPage(KofaPage):
    grok.context(IStudentStudyCourse)
    grok.name('start_session')
    grok.require('waeup.handleStudent')
    grok.template('enterpin')
    label = _('Start session')
    ac_prefix = 'SFE'
    notice = ''
    pnav = 4
    buttonname = _('Start now')
    with_ac = True

    def update(self, SUBMIT=None):
        if not self.context.is_current:
            emit_lock_message(self)
            return
        super(StartSessionPage, self).update()
        if not self.context.next_session_allowed:
            self.flash(_("You are not entitled to start session."))
            self.redirect(self.url(self.context))
            return
        if self.with_ac:
            self.ac_series = self.request.form.get('ac_series', None)
            self.ac_number = self.request.form.get('ac_number', None)
        if SUBMIT is None:
            return
        if self.with_ac:
            pin = '%s-%s-%s' % (self.ac_prefix, self.ac_series, self.ac_number)
            code = get_access_code(pin)
            if not code:
                self.flash(_('Activation code is invalid.'))
                return
            # Mark pin as used (this also fires a pin related transition)
            if code.state == USED:
                self.flash(_('Activation code has already been used.'))
                return
            else:
                comment = _(u"invalidated")
                # Here we know that the ac is in state initialized so we do not
                # expect an error, but the owner might be different
                if not invalidate_accesscode(
                    pin,comment,self.context.student.student_id):
                    self.flash(_('You are not the owner of this access code.'))
                    return
        try:
            if self.context.student.state == CLEARED:
                IWorkflowInfo(self.context.student).fireTransition(
                    'pay_first_school_fee')
            elif self.context.student.state == RETURNING:
                IWorkflowInfo(self.context.student).fireTransition(
                    'pay_school_fee')
            elif self.context.student.state == PAID:
                IWorkflowInfo(self.context.student).fireTransition(
                    'pay_pg_fee')
        except ConstraintNotSatisfied:
            self.flash(_('An error occurred, please contact the system administrator.'))
            return
        self.flash(_('Session started.'))
        self.redirect(self.url(self.context))
        return

class AddStudyLevelFormPage(KofaEditFormPage):
    """ Page for students to add current study levels
    """
    grok.context(IStudentStudyCourse)
    grok.name('add')
    grok.require('waeup.handleStudent')
    grok.template('studyleveladdpage')
    form_fields = grok.AutoFields(IStudentStudyCourse)
    pnav = 4

    @property
    def label(self):
        studylevelsource = StudyLevelSource().factory
        code = self.context.current_level
        title = studylevelsource.getTitle(self.context, code)
        return _('Add current level ${a}', mapping = {'a':title})

    def update(self):
        if not self.context.is_current:
            emit_lock_message(self)
            return
        if self.context.student.state != PAID:
            emit_lock_message(self)
            return
        super(AddStudyLevelFormPage, self).update()
        return

    @action(_('Create course list now'), style='primary')
    def addStudyLevel(self, **data):
        studylevel = createObject(u'waeup.StudentStudyLevel')
        studylevel.level = self.context.current_level
        studylevel.level_session = self.context.current_session
        try:
            self.context.addStudentStudyLevel(
                self.context.certificate,studylevel)
        except KeyError:
            self.flash(_('This level exists.'))
        except RequiredMissing:
            self.flash(_('Your data are incomplete'))
        self.redirect(self.url(self.context))
        return

class StudyLevelEditFormPage(KofaEditFormPage):
    """ Page to edit the student study level data by students
    """
    grok.context(IStudentStudyLevel)
    grok.name('edit')
    grok.require('waeup.editStudyLevel')
    grok.template('studyleveleditpage')
    form_fields = grok.AutoFields(IStudentStudyLevel).omit(
        'level_session', 'level_verdict')
    pnav = 4

    def update(self, ADD=None, course=None):
        if not self.context.__parent__.is_current:
            emit_lock_message(self)
            return
        if self.context.student.state != PAID or \
            not self.context.is_current_level:
            emit_lock_message(self)
            return
        super(StudyLevelEditFormPage, self).update()
        datatable.need()
        warning.need()
        if ADD is not None:
            if not course:
                self.flash(_('No valid course code entered.'))
                return
            cat = queryUtility(ICatalog, name='courses_catalog')
            result = cat.searchResults(code=(course, course))
            if len(result) != 1:
                self.flash(_('Course not found.'))
                return
            course = list(result)[0]
            addCourseTicket(self, course)
        return

    @property
    def label(self):
        # Here we know that the cookie has been set
        lang = self.request.cookies.get('kofa.language')
        level_title = translate(self.context.level_title, 'waeup.kofa',
            target_language=lang)
        return _('Edit course list of ${a}',
            mapping = {'a':level_title})

    @property
    def translated_values(self):
        return translated_values(self)

    def _delCourseTicket(self, **data):
        form = self.request.form
        if 'val_id' in form:
            child_id = form['val_id']
        else:
            self.flash(_('No ticket selected.'))
            self.redirect(self.url(self.context, '@@edit'))
            return
        if not isinstance(child_id, list):
            child_id = [child_id]
        deleted = []
        for id in child_id:
            # Students are not allowed to remove core tickets
            if id in self.context and \
                self.context[id].removable_by_student:
                del self.context[id]
                deleted.append(id)
        if len(deleted):
            self.flash(_('Successfully removed: ${a}',
                mapping = {'a':', '.join(deleted)}))
            self.context.writeLogMessage(
                self,'removed: %s at %s' %
                (', '.join(deleted), self.context.level))
        self.redirect(self.url(self.context, u'@@edit'))
        return

    @jsaction(_('Remove selected tickets'))
    def delCourseTicket(self, **data):
        self._delCourseTicket(**data)
        return

    def _registerCourses(self, **data):
        if self.context.student.is_postgrad:
            self.flash(_(
                "You are a postgraduate student, "
                "your course list can't bee registered."))
            self.redirect(self.url(self.context))
            return
        students_utils = getUtility(IStudentsUtils)
        max_credits = students_utils.maxCredits(self.context)
        if self.context.total_credits > max_credits:
            self.flash(_('Maximum credits of ${a} exceeded.',
                mapping = {'a':max_credits}))
            return
        IWorkflowInfo(self.context.student).fireTransition(
            'register_courses')
        self.flash(_('Course list has been registered.'))
        self.redirect(self.url(self.context))
        return

    @action(_('Register course list'))
    def registerCourses(self, **data):
        self._registerCourses(**data)
        return

class CourseTicketAddFormPage2(CourseTicketAddFormPage):
    """Add a course ticket by student.
    """
    grok.name('ctadd')
    grok.require('waeup.handleStudent')
    form_fields = grok.AutoFields(ICourseTicketAdd)

    def update(self):
        if self.context.student.state != PAID or \
            not self.context.is_current_level:
            emit_lock_message(self)
            return
        super(CourseTicketAddFormPage2, self).update()
        return

    @action(_('Add course ticket'))
    def addCourseTicket(self, **data):
        # Safety belt
        if self.context.student.state != PAID:
            return
        course = data['course']
        success = addCourseTicket(self, course)
        if success:
            self.redirect(self.url(self.context, u'@@edit'))
        return

class SetPasswordPage(KofaPage):
    grok.context(IKofaObject)
    grok.name('setpassword')
    grok.require('waeup.Anonymous')
    grok.template('setpassword')
    label = _('Set password for first-time login')
    ac_prefix = 'PWD'
    pnav = 0
    set_button = _('Set')

    def update(self, SUBMIT=None):
        self.reg_number = self.request.form.get('reg_number', None)
        self.ac_series = self.request.form.get('ac_series', None)
        self.ac_number = self.request.form.get('ac_number', None)

        if SUBMIT is None:
            return
        hitlist = search(query=self.reg_number,
            searchtype='reg_number', view=self)
        if not hitlist:
            self.flash(_('No student found.'))
            return
        if len(hitlist) != 1:   # Cannot happen but anyway
            self.flash(_('More than one student found.'))
            return
        student = hitlist[0].context
        self.student_id = student.student_id
        student_pw = student.password
        pin = '%s-%s-%s' % (self.ac_prefix, self.ac_series, self.ac_number)
        code = get_access_code(pin)
        if not code:
            self.flash(_('Access code is invalid.'))
            return
        if student_pw and pin == student.adm_code:
            self.flash(_(
                'Password has already been set. Your Student Id is ${a}',
                mapping = {'a':self.student_id}))
            return
        elif student_pw:
            self.flash(
                _('Password has already been set. You are using the ' +
                'wrong Access Code.'))
            return
        # Mark pin as used (this also fires a pin related transition)
        # and set student password
        if code.state == USED:
            self.flash(_('Access code has already been used.'))
            return
        else:
            comment = _(u"invalidated")
            # Here we know that the ac is in state initialized so we do not
            # expect an exception
            invalidate_accesscode(pin,comment)
            IUserAccount(student).setPassword(self.ac_number)
            student.adm_code = pin
        self.flash(_('Password has been set. Your Student Id is ${a}',
            mapping = {'a':self.student_id}))
        return

class StudentRequestPasswordPage(KofaAddFormPage):
    """Captcha'd registration page for applicants.
    """
    grok.name('requestpw')
    grok.require('waeup.Anonymous')
    grok.template('requestpw')
    form_fields = grok.AutoFields(IStudentRequestPW).select(
        'firstname','number','email')
    label = _('Request password for first-time login')

    def update(self):
        # Handle captcha
        self.captcha = getUtility(ICaptchaManager).getCaptcha()
        self.captcha_result = self.captcha.verify(self.request)
        self.captcha_code = self.captcha.display(self.captcha_result.error_code)
        return

    def _redirect(self, email, password, student_id):
        # Forward only email to landing page in base package.
        self.redirect(self.url(self.context, 'requestpw_complete',
            data = dict(email=email)))
        return

    def _pw_used(self):
        # XXX: False if password has not been used. We need an extra
        #      attribute which remembers if student logged in.
        return True

    @action(_('Send login credentials to email address'), style='primary')
    def get_credentials(self, **data):
        if not self.captcha_result.is_valid:
            # Captcha will display error messages automatically.
            # No need to flash something.
            return
        number = data.get('number','')
        firstname = data.get('firstname','')
        cat = getUtility(ICatalog, name='students_catalog')
        results = list(
            cat.searchResults(reg_number=(number, number)))
        if not results:
            results = list(
                cat.searchResults(matric_number=(number, number)))
        if results:
            student = results[0]
            if getattr(student,'firstname',None) is None:
                self.flash(_('An error occurred.'))
                return
            elif student.firstname.lower() != firstname.lower():
                # Don't tell the truth here. Anonymous must not
                # know that a record was found and only the firstname
                # verification failed.
                self.flash(_('No student record found.'))
                return
            elif student.password is not None and self._pw_used:
                self.flash(_('Your password has already been set and used. '
                             'Please proceed to the login page.'))
                return
            # Store email address but nothing else.
            student.email = data['email']
            notify(grok.ObjectModifiedEvent(student))
        else:
            # No record found, this is the truth.
            self.flash(_('No student record found.'))
            return

        kofa_utils = getUtility(IKofaUtils)
        password = kofa_utils.genPassword()
        mandate = PasswordMandate()
        mandate.params['password'] = password
        mandate.params['user'] = student
        site = grok.getSite()
        site['mandates'].addMandate(mandate)
        # Send email with credentials
        args = {'mandate_id':mandate.mandate_id}
        mandate_url = self.url(site) + '/mandate?%s' % urlencode(args)
        url_info = u'Confirmation link: %s' % mandate_url
        msg = _('You have successfully requested a password for the')
        if kofa_utils.sendCredentials(IUserAccount(student),
            password, url_info, msg):
            email_sent = student.email
        else:
            email_sent = None
        self._redirect(email=email_sent, password=password,
            student_id=student.student_id)
        ob_class = self.__implemented__.__name__.replace('waeup.kofa.','')
        self.context.logger.info(
            '%s - %s (%s) - %s' % (ob_class, number, student.student_id, email_sent))
        return

class StudentRequestPasswordEmailSent(KofaPage):
    """Landing page after successful password request.

    """
    grok.name('requestpw_complete')
    grok.require('waeup.Public')
    grok.template('requestpwmailsent')
    label = _('Your password request was successful.')

    def update(self, email=None, student_id=None, password=None):
        self.email = email
        self.password = password
        self.student_id = student_id
        return

class FilterStudentsInDepartmentPage(KofaPage):
    """Page that filters and lists students.
    """
    grok.context(IDepartment)
    grok.require('waeup.showStudents')
    grok.name('students')
    grok.template('filterstudentspage')
    pnav = 1
    session_label = _('Current Session')
    level_label = _('Current Level')

    def label(self):
        return 'Students in %s' % self.context.longtitle()

    def _set_session_values(self):
        vocab_terms = academic_sessions_vocab.by_value.values()
        self.sessions = sorted(
            [(x.title, x.token) for x in vocab_terms], reverse=True)
        self.sessions += [('All Sessions', 'all')]
        return

    def _set_level_values(self):
        vocab_terms = course_levels.by_value.values()
        self.levels = sorted(
            [(x.title, x.token) for x in vocab_terms])
        self.levels += [('All Levels', 'all')]
        return

    def _searchCatalog(self, session, level):
        if level not in (10, 999, None):
            start_level = 100 * (level // 100)
            end_level = start_level + 90
        else:
            start_level = end_level = level
        cat = queryUtility(ICatalog, name='students_catalog')
        students = cat.searchResults(
            current_session=(session, session),
            current_level=(start_level, end_level),
            depcode=(self.context.code, self.context.code)
            )
        hitlist = []
        for student in students:
            hitlist.append(StudentQueryResultItem(student, view=self))
        return hitlist

    def update(self, SHOW=None, session=None, level=None):
        datatable.need()
        self.parent_url = self.url(self.context.__parent__)
        self._set_session_values()
        self._set_level_values()
        self.hitlist = []
        self.session_default = session
        self.level_default = level
        if SHOW is not None:
            if session != 'all':
                self.session = int(session)
                self.session_string = '%s %s/%s' % (
                    self.session_label, self.session, self.session+1)
            else:
                self.session = None
                self.session_string = _('in any session')
            if level != 'all':
                self.level = int(level)
                self.level_string = '%s %s' % (self.level_label, self.level)
            else:
                self.level = None
                self.level_string = _('at any level')
            self.hitlist = self._searchCatalog(self.session, self.level)
            if not self.hitlist:
                self.flash(_('No student found.'))
        return

class FilterStudentsInCertificatePage(FilterStudentsInDepartmentPage):
    """Page that filters and lists students.
    """
    grok.context(ICertificate)

    def label(self):
        return 'Students studying %s' % self.context.longtitle()

    def _searchCatalog(self, session, level):
        if level not in (10, 999, None):
            start_level = 100 * (level // 100)
            end_level = start_level + 90
        else:
            start_level = end_level = level
        cat = queryUtility(ICatalog, name='students_catalog')
        students = cat.searchResults(
            current_session=(session, session),
            current_level=(start_level, end_level),
            certcode=(self.context.code, self.context.code)
            )
        hitlist = []
        for student in students:
            hitlist.append(StudentQueryResultItem(student, view=self))
        return hitlist

class FilterStudentsInCoursePage(FilterStudentsInDepartmentPage):
    """Page that filters and lists students.
    """
    grok.context(ICourse)

    session_label = _('Session')
    level_label = _('Level')

    def label(self):
        return 'Students registered for %s' % self.context.longtitle()

    def _searchCatalog(self, session, level):
        if level not in (10, 999, None):
            start_level = 100 * (level // 100)
            end_level = start_level + 90
        else:
            start_level = end_level = level
        cat = queryUtility(ICatalog, name='coursetickets_catalog')
        coursetickets = cat.searchResults(
            session=(session, session),
            level=(start_level, end_level),
            code=(self.context.code, self.context.code)
            )
        hitlist = []
        for ticket in coursetickets:
            hitlist.append(StudentQueryResultItem(ticket.student, view=self))
        return list(set(hitlist))

class ExportJobContainerOverview(KofaPage):
    """Page that lists active student data export jobs and provides links
    to discard or download CSV files.

    """
    grok.context(VirtualExportJobContainer)
    grok.require('waeup.showStudents')
    grok.name('index.html')
    grok.template('exportjobsindex')
    label = _('Student Data Exports')
    pnav = 1

    def update(self, CREATE=None, DISCARD=None, job_id=None):
        if CREATE:
            self.redirect(self.url('@@exportconfig'))
            return
        if DISCARD and job_id:
            entry = self.context.entry_from_job_id(job_id)
            self.context.delete_export_entry(entry)
            ob_class = self.__implemented__.__name__.replace('waeup.kofa.','')
            self.context.logger.info(
                '%s - discarded: job_id=%s' % (ob_class, job_id))
            self.flash(_('Discarded export') + ' %s' % job_id)
        self.entries = doll_up(self, user=self.request.principal.id)
        return

class ExportJobContainerJobConfig(KofaPage):
    """Page that configures a students export job.

    This is a baseclass.
    """
    grok.baseclass()
    grok.name('exportconfig')
    grok.require('waeup.showStudents')
    grok.template('exportconfig')
    label = _('Configure student data export')
    pnav = 1
    redirect_target = ''

    def _set_session_values(self):
        vocab_terms = academic_sessions_vocab.by_value.values()
        self.sessions = sorted(
            [(x.title, x.token) for x in vocab_terms], reverse=True)
        self.sessions += [(_('All Sessions'), 'all')]
        return

    def _set_level_values(self):
        vocab_terms = course_levels.by_value.values()
        self.levels = sorted(
            [(x.title, x.token) for x in vocab_terms])
        self.levels += [(_('All Levels'), 'all')]
        return

    def _set_mode_values(self):
        utils = getUtility(IKofaUtils)
        self.modes = sorted([(value, key) for key, value in
                      utils.STUDY_MODES_DICT.items()])
        self.modes +=[(_('All Modes'), 'all')]
        return

    def _set_exporter_values(self):
        # We provide all student exporters, nothing else, yet.
        exporters = []
        for name in EXPORTER_NAMES:
            util = getUtility(ICSVExporter, name=name)
            exporters.append((util.title, name),)
        self.exporters = exporters

    @property
    def depcode(self):
        return None

    @property
    def certcode(self):
        return None

    def update(self, START=None, session=None, level=None, mode=None,
               exporter=None):
        self._set_session_values()
        self._set_level_values()
        self._set_mode_values()
        self._set_exporter_values()
        if START is None:
            return
        if session == 'all':
            session=None
        if level == 'all':
            level = None
        if mode == 'all':
            mode = None
        if (mode, level, session,
            self.depcode, self.certcode) == (None, None, None, None, None):
            # Export all students including those without certificate
            job_id = self.context.start_export_job(exporter,
                                          self.request.principal.id)
        else:
            job_id = self.context.start_export_job(exporter,
                                          self.request.principal.id,
                                          current_session=session,
                                          current_level=level,
                                          current_mode=mode,
                                          depcode=self.depcode,
                                          certcode=self.certcode)
        ob_class = self.__implemented__.__name__.replace('waeup.kofa.','')
        self.context.logger.info(
            '%s - exported: %s (%s, %s, %s, %s, %s), job_id=%s'
            % (ob_class, exporter, session, level, mode, self.depcode,
            self.certcode, job_id))
        self.flash(_('Export started for students with') +
                   ' current_session=%s, current_level=%s, study_mode=%s' % (
                   session, level, mode))
        self.redirect(self.url(self.redirect_target))
        return

class ExportJobContainerDownload(ExportCSVView):
    """Page that downloads a students export csv file.

    """
    grok.context(VirtualExportJobContainer)
    grok.require('waeup.showStudents')

class DatacenterExportJobContainerJobConfig(ExportJobContainerJobConfig):
    """Page that configures a students export job in datacenter.

    """
    grok.context(IDataCenter)
    redirect_target = '@@export'

class DepartmentExportJobContainerJobConfig(ExportJobContainerJobConfig):
    """Page that configures a students export job in departments.

    """
    grok.context(VirtualDepartmentExportJobContainer)

    @property
    def depcode(self):
        return self.context.__parent__.code

class CertificateExportJobContainerJobConfig(ExportJobContainerJobConfig):
    """Page that configures a students export job for certificates.

    """
    grok.context(VirtualCertificateExportJobContainer)
    grok.template('exportconfig_certificate')

    @property
    def certcode(self):
        return self.context.__parent__.code

class CourseExportJobContainerJobConfig(ExportJobContainerJobConfig):
    """Page that configures a students export job for courses.

    In contrast to department or certificate student data exports the
    coursetickets_catalog is searched here. Therefore the update
    method from the base class is customized.
    """
    grok.context(VirtualCourseExportJobContainer)
    grok.template('exportconfig_course')

    def _set_exporter_values(self):
        # We provide only two exporters.
        exporters = []
        for name in ('students', 'coursetickets'):
            util = getUtility(ICSVExporter, name=name)
            exporters.append((util.title, name),)
        self.exporters = exporters

    def update(self, START=None, session=None, level=None, mode=None,
               exporter=None):
        self._set_session_values()
        self._set_level_values()
        self._set_mode_values()
        self._set_exporter_values()
        if START is None:
            return
        if session == 'all':
            session = None
        if level == 'all':
            level = None
        job_id = self.context.start_export_job(exporter,
                                      self.request.principal.id,
                                      # Use a different catalog and
                                      # pass different keywords than
                                      # for the (default) students_catalog
                                      catalog='coursetickets',
                                      session=session,
                                      level=level,
                                      code=self.context.__parent__.code)
        ob_class = self.__implemented__.__name__.replace('waeup.kofa.','')
        self.context.logger.info(
            '%s - exported: %s (%s, %s, %s), job_id=%s'
            % (ob_class, exporter, session, level,
            self.context.__parent__.code, job_id))
        self.flash(_('Export started for course tickets with') +
                   ' level_session=%s, level=%s' % (
                   session, level))
        self.redirect(self.url(self.redirect_target))
        return