OpenSlides/openslides/application/views.py

#!/usr/bin/env python
# -*- coding: utf-8 -*-
"""
    openslides.application.views
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~

    Views for the application app.

    :copyright: 2011, 2012 by OpenSlides team, see AUTHORS.
    :license: GNU GPL, see LICENSE for more details.
"""

# for python 2.5 support
from __future__ import with_statement

import csv
import os

try:
    from urlparse import parse_qs
except ImportError: # python <= 2.5
    from cgi import parse_qs

from reportlab.lib import colors
from reportlab.lib.units import cm
from reportlab.platypus import (SimpleDocTemplate, PageBreak, Paragraph, Spacer,
    Table, TableStyle)

from django.conf import settings
from django.contrib import messages
from django.contrib.auth.decorators import login_required
from django.contrib.auth.models import User, Group
from django.core.context_processors import csrf
from django.core.urlresolvers import reverse
from django.db import transaction
from django.shortcuts import redirect
from django.utils.translation import ugettext_lazy as _, ungettext

from openslides.utils import csv_ext
from openslides.utils.pdf import stylesheet
from openslides.utils.template import Tab
from openslides.utils.utils import (template, permission_required,
    del_confirm_form, gen_confirm_form)
from openslides.utils.views import PDFView, RedirectView, DeleteView, FormView

from openslides.config.models import config

from openslides.projector.projector import Widget

from openslides.poll.views import PollFormView

from openslides.participant.api import gen_username, gen_password
from openslides.participant.models import Profile

from openslides.agenda.models import Item

from openslides.application.models import Application, AVersion, ApplicationPoll
from openslides.application.forms import (ApplicationForm,
    ApplicationFormTrivialChanges, ApplicationManagerForm,
    ApplicationManagerFormSupporter, ApplicationImportForm, ConfigForm)


@permission_required('application.can_see_application')
@template('application/overview.html')
def overview(request):
    """
    View all applications
    """
    try:
        sortfilter = parse_qs(request.COOKIES['votecollector_sortfilter'])
        for value in sortfilter:
            sortfilter[value] = sortfilter[value][0]
    except KeyError:
        sortfilter = {}

    for value in [u'sort', u'reverse', u'number', u'status', u'needsup', u'statusvalue']:
        if value in request.REQUEST:
            if request.REQUEST[value] == '0':
                try:
                    del sortfilter[value]
                except KeyError:
                    pass
            else:
                sortfilter[value] = request.REQUEST[value]

    query = Application.objects.all()
    if 'number' in sortfilter:
        query = query.filter(number=None)
    if 'status' in sortfilter:
        if 'statusvalue' in sortfilter and 'on' in sortfilter['status']:
            query = query.filter(status__iexact=sortfilter['statusvalue'])

    if 'sort' in sortfilter:
        if sortfilter['sort'] == 'title':
            sort = 'aversion__title'
        elif sortfilter['sort'] == 'time':
            sort = 'aversion__time'
        else:
            sort = sortfilter['sort']
        query = query.order_by(sort)

        if sort.startswith('aversion_'):
            # limit result to last version of an application
            query = query.filter(aversion__id__in=[x.last_version.id for x in Application.objects.all()])

    if 'reverse' in sortfilter:
        query = query.reverse()

    # todo: rewrite this with a .filter()
    if 'needsup' in sortfilter:
        applications = []
        for application in query.all():
            if not application.enough_supporters:
                applications.append(application)
    else:
        applications = query

    if type(applications) is not list:
        applications = list(query.all())

    # not the most efficient way to do this but 'get_allowed_actions'
    # is not callable from within djangos templates..
    for (i, application) in enumerate(applications):
        try:
            applications[i] = {
                'actions'     : application.get_allowed_actions(request.user),
                'application' : application
            }
        except:
            # todo: except what?
            applications[i] = {
                'actions'     : [],
                'application' : application
            }

    return {
        'applications': applications,
        'min_supporters': int(config['application_min_supporters']),
    }


@permission_required('application.can_see_application')
@template('application/view.html')
def view(request, application_id, newest=False):
    """
    View one application.
    """
    application = Application.objects.get(pk=application_id)
    if newest:
        version = application.last_version
    else:
        version = application.public_version
    revisions = application.versions
    actions = application.get_allowed_actions(user=request.user)

    return {
        'application': application,
        'revisions': revisions,
        'actions': actions,
        'min_supporters': int(config['application_min_supporters']),
        'version': version,
        #'results': application.results
    }


@login_required
@template('application/edit.html')
def edit(request, application_id=None):
    """
    View a form to edit or create a application.
    """
    if request.user.has_perm('application.can_manage_application'):
        is_manager = True
    else:
        is_manager = False

    if not is_manager \
    and not request.user.has_perm('application.can_create_application'):
        messages.error(request, _("You have not the necessary rights to create or edit applications."))
        return redirect(reverse('application_overview'))
    if application_id is not None:
        application = Application.objects.get(id=application_id)
        if not request.user == application.submitter and not is_manager:
            messages.error(request, _("You can not edit this application. You are not the submitter."))
            return redirect(reverse('application_view', args=[application.id]))
        actions = application.get_allowed_actions(user=request.user)
    else:
        application = None
        actions = None

    formclass = ApplicationFormTrivialChanges \
        if config['application_allow_trivial_change'] and application_id \
        else ApplicationForm

    managerformclass = ApplicationManagerFormSupporter \
                       if config['application_min_supporters'] \
                       else ApplicationManagerForm

    if request.method == 'POST':
        dataform = formclass(request.POST, prefix="data")
        valid = dataform.is_valid()

        if is_manager:
            managerform = managerformclass(request.POST,
                            instance=application,
                            prefix="manager")
            valid = valid and managerform.is_valid()
        else:
            managerform = None

        if valid:
            del_supporters = True
            original_supporters = []
            if is_manager:
                if application: # Edit application
                    for s in application.supporter.all():
                        original_supporters.append(s)
                application = managerform.save(commit=False)
            elif application_id is None:
                application = Application(submitter=request.user)
            application.title = dataform.cleaned_data['title']
            application.text = dataform.cleaned_data['text']
            application.reason = dataform.cleaned_data['reason']

            try:
                trivial_change = config['application_allow_trivial_change'] \
                    and dataform.cleaned_data['trivial_change']
            except KeyError:
                trivial_change = False
            application.save(request.user, trivial_change=trivial_change)
            if is_manager:
                # log added supporters
                supporters_added = []
                for s in application.supporter.all():
                    if s not in original_supporters:
                        try:
                            supporters_added.append(unicode(s.profile))
                        except Profile.DoesNotExist:
                            pass
                if len(supporters_added) > 0:
                    log_added = ", ".join(supporters_added)
                    application.writelog(_("Supporter: +%s") % log_added, request.user)
                # log removed supporters
                supporters_removed = []
                for s in original_supporters:
                    if s not in application.supporter.all():
                        try:
                            supporters_removed.append(unicode(s.profile))
                        except Profile.DoesNotExist:
                            pass
                if len(supporters_removed) > 0:
                    log_removed = ", ".join(supporters_removed)
                    application.writelog(_("Supporter: -%s") % log_removed, request.user)
            if application_id is None:
                messages.success(request, _('New application was successfully created.'))
            else:
                messages.success(request, _('Application was successfully modified.'))

            if not 'apply' in request.POST:
                return redirect(reverse('application_view', args=[application.id]))
            if application_id is None:
                return redirect(reverse('application_edit', args=[application.id]))
        else:
            messages.error(request, _('Please check the form for errors.'))
    else:
        if application_id is None:
            initial = {'text': config['application_preamble']}
        else:
            if application.status == "pub" and application.supporter.exists():
                if request.user.has_perm('application.can_manage_application'):
                    messages.warning(request, _("Attention: Do you really want to edit this application? The supporters will <b>not</b> be removed automatically because you can manage applications. Please check if the supports are valid after your changing!"))
                else:
                    messages.warning(request, _("Attention: Do you really want to edit this application? All <b>%s</b> supporters will be removed! Try to convince the supporters again.") % application.supporter.count() )
            initial = {'title': application.title,
                       'text': application.text,
                       'reason': application.reason}

        dataform = formclass(initial=initial, prefix="data")
        if is_manager:
            if application_id is None:
                initial = {'submitter': str(request.user.id)}
            else:
                initial = {}
            managerform = managerformclass(initial=initial, \
                                                 instance=application, \
                                                 prefix="manager")
        else:
            managerform = None
    return {
        'form': dataform,
        'managerform': managerform,
        'application': application,
        'actions': actions,
    }


@permission_required('application.can_manage_application')
@template('application/view.html')
def set_number(request, application_id):
    """
    set a number for an application.
    """
    try:
        Application.objects.get(pk=application_id).set_number(user=request.user)
        messages.success(request, _("Application number was successfully set."))
    except Application.DoesNotExist:
        pass
    except NameError:
        pass
    return redirect(reverse('application_view', args=[application_id]))


@permission_required('application.can_manage_application')
@template('application/view.html')
def permit(request, application_id):
    """
    permit an application.
    """
    try:
        Application.objects.get(pk=application_id).permit(user=request.user)
        messages.success(request, _("Application was successfully permitted."))
    except Application.DoesNotExist:
        pass
    return redirect(reverse('application_view', args=[application_id]))

@permission_required('application.can_manage_application')
@template('application/view.html')
def notpermit(request, application_id):
    """
    reject (not permit) an application.
    """
    try:
        Application.objects.get(pk=application_id).notpermit(user=request.user)
        messages.success(request, _("Application was successfully rejected."))
    except Application.DoesNotExist:
        pass
    return redirect(reverse('application_view', args=[application_id]))

@template('application/view.html')
def set_status(request, application_id=None, status=None):
    """
    set a status of an application.
    """
    try:
        if status is not None:
            application = Application.objects.get(pk=application_id)
            application.set_status(user=request.user, status=status)
            messages.success(request, _("Application status was set to: <b>%s</b>.") % application.get_status_display())
    except Application.DoesNotExist:
        pass
    return redirect(reverse('application_view', args=[application_id]))


@permission_required('application.can_manage_application')
@template('application/view.html')
def reset(request, application_id):
    """
    reset an application.
    """
    try:
        Application.objects.get(pk=application_id).reset(user=request.user)
        messages.success(request, _("Application status was reset.") )
    except Application.DoesNotExist:
        pass
    return redirect(reverse('application_view', args=[application_id]))


@permission_required('application.can_support_application')
@template('application/view.html')
def support(request, application_id):
    """
    support an application.
    """
    try:
        Application.objects.get(pk=application_id).support(user=request.user)
        messages.success(request, _("You have support the application successfully.") )
    except Application.DoesNotExist:
        pass
    return redirect(reverse('application_view', args=[application_id]))


@permission_required('application.can_support_application')
@template('application/view.html')
def unsupport(request, application_id):
    """
    unsupport an application.
    """
    try:
        Application.objects.get(pk=application_id).unsupport(user=request.user)
        messages.success(request, _("You have unsupport the application successfully.") )
    except Application.DoesNotExist:
        pass
    return redirect(reverse('application_view', args=[application_id]))


@permission_required('application.can_manage_application')
@template('application/view.html')
def gen_poll(request, application_id):
    """
    gen a poll for this application.
    """
    try:
        poll = Application.objects.get(pk=application_id).gen_poll(user=request.user)
        messages.success(request, _("New vote was successfully created.") )
    except Application.DoesNotExist:
        pass # TODO: do not call poll after this excaption
    return redirect(reverse('application_poll_view', args=[poll.id]))


@permission_required('application.can_manage_application')
def delete_poll(request, poll_id):
    """
    delete a poll from this application
    """
    poll = ApplicationPoll.objects.get(pk=poll_id)
    application = poll.application
    count = application.polls.filter(id__lte=poll_id).count()
    if request.method == 'POST':
        poll.delete()
        application.writelog(_("Poll deleted"), request.user)
        messages.success(request, _('Poll was successfully deleted.'))
    else:
        del_confirm_form(request, poll, name=_("the %s. poll") % count, delete_link=reverse('application_poll_delete', args=[poll_id]))
    return redirect(reverse('application_view', args=[application.id]))


class ApplicationDelete(DeleteView):
    """
    Delete one or more Applications.
    """
    permission_required = 'application.can_manage_application'
    model = Application
    url = 'application_overview'

    def get_object(self):
        self.applications = []

        if self.kwargs.get('application_id', None):
            try:
                return Application.objects.get(id=int(self.kwargs['application_id']))
            except Application.DoesNotExist:
                return None

        if self.kwargs.get('application_ids', []):
            for appid in self.kwargs['application_ids']:
                try:
                    self.applications.append(Application.objects.get(id=int(appid)))
                except Application.DoesNotExist:
                    pass

            if self.applications:
                return self.applications[0]
        return None

    def pre_post_redirect(self, request, *args, **kwargs):
        self.object = self.get_object()

        if len(self.applications):
            for application in self.applications:
                if not 'delete' in application.get_allowed_actions(user=request.user):
                    messages.error(request, _("You can not delete application <b>%s</b>.") % application)
                    continue

                title = application.title
                application.delete(force=True)
                messages.success(request, _("Application <b>%s</b> was successfully deleted.") % title)

        elif self.object:
                if not 'delete' in self.object.get_allowed_actions(user=request.user):
                    messages.error(request, _("You can not delete application <b>%s</b>.") % self.object)
                else:
                    title = self.object.title
                    self.object.delete(force=True)
                    messages.success(request, _("Application <b>%s</b> was successfully deleted.") % title)
        else:
            messages.error(request, _("Invalid request"))

    def gen_confirm_form(self, request, message, url):
        formbase = '%s<form action="%s" method="post"><input type="hidden" value="%s" name="csrfmiddlewaretoken">' % (message, url, csrf(request)['csrf_token'])

        if len(self.applications):
            for application in self.applications:
                formbase += '<input type="hidden" name="application_ids" value="%s">' % application.id
        elif self.object:
            formbase += '<input type="hidden" name="application_id" value="%s">' % self.object.id

        formbase +='<input type="submit" value="%s" /> <input type="button" value="%s"></form>' %  (_("Yes"), _("No"))
        messages.warning(request, formbase)


    def confirm_form(self, request, object, item=None):
        self.object = self.get_object()

        if len(self.applications):
            self.gen_confirm_form(request, _('Do you really want to delete multiple applications?') % self.object.get_absolute_url('delete'))
        else:
            self.gen_confirm_form(request, _('Do you really want to delete <b>%s</b>?') % self.object, self.object.get_absolute_url('delete'))

class ViewPoll(PollFormView):
    permission_required = 'application.can_manage_application'
    poll_class = ApplicationPoll
    template_name = 'application/poll_view.html'

    def get_context_data(self, **kwargs):
        context = super(ViewPoll, self).get_context_data(**kwargs)
        self.application = self.poll.get_application()
        context['application'] = self.application
        context['ballot'] = self.poll.get_ballot()
        context['actions'] = self.application.get_allowed_actions(user=self.request.user)
        return context

    def get_modelform_class(self):
        cls = super(ViewPoll, self).get_modelform_class()
        user = self.request.user

        class ViewPollFormClass(cls):
            def save(self, commit = True):
                instance = super(ViewPollFormClass, self).save(commit)
                application = instance.application
                application.writelog(_("Poll was updated"), user)
                return instance

        return ViewPollFormClass

    def get_success_url(self):
        if not 'apply' in self.request.POST:
            return reverse('application_view', args=[self.poll.application.id])
        return ''


@permission_required('application.can_manage_application')
def permit_version(request, aversion_id):
    aversion = AVersion.objects.get(pk=aversion_id)
    application = aversion.application
    if request.method == 'POST':
        application.accept_version(aversion, user = request.user)
        messages.success(request, _("Version <b>%s</b> accepted.") % (aversion.aid))
    else:
        gen_confirm_form(request, _('Do you really want to permit version <b>%s</b>?') % aversion.aid, reverse('application_version_permit', args=[aversion.id]))
    return redirect(reverse('application_view', args=[application.id]))


@permission_required('application.can_manage_application')
def reject_version(request, aversion_id):
    aversion = AVersion.objects.get(pk=aversion_id)
    application = aversion.application
    if request.method == 'POST':
        if application.reject_version(aversion, user = request.user):
            messages.success(request, _("Version <b>%s</b> rejected.") % (aversion.aid))
        else:
            messages.error(request, _("ERROR by rejecting the version.") )
    else:
        gen_confirm_form(request, _('Do you really want to reject version <b>%s</b>?') % aversion.aid, reverse('application_version_reject', args=[aversion.id]))
    return redirect(reverse('application_view', args=[application.id]))


@permission_required('application.can_manage_application')
@template('application/import.html')
def application_import(request):
    try:
        request.user.profile
        messages.error(request, _('The import function is available for the superuser (without user profile) only.'))
        return redirect(reverse('application_overview'))
    except Profile.DoesNotExist:
        pass
    except AttributeError:
        # AnonymousUser
        pass

    if request.method == 'POST':
        form = ApplicationImportForm(request.POST, request.FILES)
        if form.is_valid():
            import_permitted = form.cleaned_data['import_permitted']
            try:
                # check for valid encoding (will raise UnicodeDecodeError if not)
                request.FILES['csvfile'].read().decode('utf-8')
                request.FILES['csvfile'].seek(0)

                users_generated = 0
                applications_generated = 0
                applications_modified = 0
                with transaction.commit_on_success():
                    dialect = csv.Sniffer().sniff(request.FILES['csvfile'].readline())
                    dialect = utils.csv_ext.patchup(dialect)
                    request.FILES['csvfile'].seek(0)
                    for (lno, line) in enumerate(csv.reader(request.FILES['csvfile'], dialect=dialect)):
                        # basic input verification
                        if lno < 1:
                            continue
                        try:
                            (number, title, text, reason, first_name, last_name) = line[:6]
                        except ValueError:
                            messages.error(request, _('Ignoring malformed line %d in import file.') % (lno + 1))
                            continue
                        form = ApplicationForm({'title': title, 'text': text, 'reason': reason})
                        if not form.is_valid():
                            messages.error(request, _('Ignoring malformed line %d in import file.') % (lno + 1))
                            continue
                        if number:
                            try:
                                number = abs(long(number))
                                if number < 1:
                                    messages.error(request, _('Ignoring malformed line %d in import file.') % (lno + 1))
                                    continue
                            except ValueError:
                                messages.error(request, _('Ignoring malformed line %d in import file.') % (lno + 1))
                                continue
                        # fetch existing users or create new users as needed
                        try:
                            user = User.objects.get(first_name=first_name, last_name=last_name)
                        except User.DoesNotExist:
                            user = None
                        if user is None:
                            user = User()
                            user.last_name = last_name
                            user.first_name = first_name
                            user.username = gen_username(first_name, last_name)
                            user.save()
                            profile = Profile()
                            profile.user = user
                            profile.group = ''
                            profile.committee = ''
                            profile.gender = 'none'
                            profile.type = 'guest'
                            profile.firstpassword = gen_password()
                            profile.user.set_password(profile.firstpassword)
                            profile.save()
                            users_generated += 1
                        # create / modify the application
                        application = None
                        if number:
                            try:
                                application = Application.objects.get(number=number)
                                applications_modified += 1
                            except Application.DoesNotExist:
                                application = None
                        if application is None:
                            application = Application(submitter=user)
                            if number:
                                application.number = number
                            applications_generated += 1

                        application.title = form.cleaned_data['title']
                        application.text = form.cleaned_data['text']
                        application.reason = form.cleaned_data['reason']
                        if import_permitted:
                            application.status = 'per'

                        application.save(user, trivial_change=True)

                if applications_generated:
                    messages.success(request, ungettext('%d application was successfully imported.',
                                                '%d applications were successfully imported.', applications_generated) % applications_generated)
                if applications_modified:
                    messages.success(request, ungettext('%d application was successfully modified.',
                                                '%d applications were successfully modified.', applications_modified) % applications_modified)
                if users_generated:
                    messages.success(request, ungettext('%d new user was added.', '%d new users were added.', users_generated) % users_generated)
                return redirect(reverse('application_overview'))

            except csv.Error:
                message.error(request, _('Import aborted because of severe errors in the input file.'))
            except UnicodeDecodeError:
                messages.error(request, _('Import file has wrong character encoding, only UTF-8 is supported!'))
        else:
            messages.error(request, _('Please check the form for errors.'))
    else:
        messages.warning(request, _("Attention: Existing applications will be modified if you import new applications with the same number."))
        messages.warning(request, _("Attention: Importing an application without a number multiple times will create duplicates."))
        form = ApplicationImportForm()
    return {
        'form': form,
    }


class CreateAgendaItem(RedirectView):
    permission_required = 'agenda.can_manage_agenda'

    def pre_redirect(self, request, *args, **kwargs):
        self.application = Application.objects.get(pk=kwargs['application_id'])
        self.item = Item(related_sid=self.application.sid)
        self.item.save()

    def get_redirect_url(self, **kwargs):
        return reverse('item_overview')


class ApplicationPDF(PDFView):
    permission_required = 'application.can_see_application'
    top_space = 0

    def get_filename(self):
        application_id = self.kwargs['application_id']
        if application_id is None:
            filename = _("Applications")
        else:
            application = Application.objects.get(id=application_id)
            if application.number:
                number = application.number
            else:
                number = ""
            filename = u'%s%s' % (_("Application"), str(number))
        return filename

    def append_to_pdf(self, story):
        application_id = self.kwargs['application_id']
        if application_id is None:  #print all applications
            title = config["application_pdf_title"]
            story.append(Paragraph(title, stylesheet['Heading1']))
            preamble = config["application_pdf_preamble"]
            if preamble:
                story.append(Paragraph("%s" % preamble.replace('\r\n','<br/>'), stylesheet['Paragraph']))
            story.append(Spacer(0,0.75*cm))
            applications = Application.objects.order_by('number')
            if not applications: # No applications existing
                story.append(Paragraph(_("No applications available."), stylesheet['Heading3']))
            else: # Print all Applications
                # List of applications
                for application in applications:
                    if application.number:
                        story.append(Paragraph(_("Application No.")+" %s: %s" % (application.number, application.title), stylesheet['Heading3']))
                    else:
                        story.append(Paragraph(_("Application No.")+"&nbsp;&nbsp;&nbsp;: %s" % (application.title), stylesheet['Heading3']))
                # Applications details (each application on single page)
                for application in applications:
                    story.append(PageBreak())
                    story = self.get_application(application, story)
        else:  # print selected application
            application = Application.objects.get(id=application_id)
            story = self.get_application(application, story)

    def get_application(self, application, story):
        # application number
        if application.number:
            story.append(Paragraph(_("Application No.")+" %s" % application.number, stylesheet['Heading1']))
        else:
            story.append(Paragraph(_("Application No."), stylesheet['Heading1']))

        # submitter
        cell1a = []
        cell1a.append(Spacer(0,0.2*cm))
        cell1a.append(Paragraph("<font name='Ubuntu-Bold'>%s:</font>" % _("Submitter"), stylesheet['Heading4']))
        cell1b = []
        cell1b.append(Spacer(0,0.2*cm))
        if application.status == "pub":
            cell1b.append(Paragraph("__________________________________________",stylesheet['Signaturefield']))
            cell1b.append(Spacer(0,0.1*cm))
            cell1b.append(Paragraph("&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;"+unicode(application.submitter.profile), stylesheet['Small']))
            cell1b.append(Spacer(0,0.2*cm))
        else:
            cell1b.append(Paragraph(unicode(application.submitter.profile), stylesheet['Normal']))

        # supporters
        cell2a = []
        cell2b = []
        if config['application_min_supporters']:

            cell2a.append(Paragraph("<font name='Ubuntu-Bold'>%s:</font><seqreset id='counter'>" % _("Supporters"), stylesheet['Heading4']))

            for s in application.supporter.all():
                cell2b.append(Paragraph("<seq id='counter'/>.&nbsp; %s" % unicode(s.profile), stylesheet['Signaturefield']))
            if application.status == "pub":
                for x in range(0,application.missing_supporters):
                    cell2b.append(Paragraph("<seq id='counter'/>.&nbsp; __________________________________________",stylesheet['Signaturefield']))
            cell2b.append(Spacer(0,0.2*cm))

        # status
        note = ""
        for n in application.notes:
            note += "%s " % unicode(n)
        cell3a = []
        cell3a.append(Paragraph("<font name='Ubuntu-Bold'>%s:</font>" % _("Status"), stylesheet['Heading4']))
        cell3b = []
        if note != "":
            if application.status == "pub":
                cell3b.append(Paragraph(note, stylesheet['Normal']))
            else:
                cell3b.append(Paragraph("%s | %s" % (application.get_status_display(), note), stylesheet['Normal']))
        else:
            cell3b.append(Paragraph("%s" % application.get_status_display(), stylesheet['Normal']))

        # table
        data = []
        data.append([cell1a,cell1b])
        data.append([cell2a,cell2b])
        data.append([cell3a,cell3b])

        # Version number (aid)
        if application.public_version.aid > 1:
            cell4a = []
            cell4a.append(Paragraph("<font name='Ubuntu-Bold'>%s:</font>" % _("Version"), stylesheet['Heading4']))
            cell4b = []
            cell4b.append(Paragraph("%s" % application.public_version.aid, stylesheet['Normal']))
            data.append([cell4a,cell4b])

        poll_results = application.get_poll_results()

        # voting results
        if poll_results:
            cell5a = []
            cell5a.append(Paragraph("<font name='Ubuntu-Bold'>%s:</font>" % _("Vote results"), stylesheet['Heading4']))
            cell5b = []
            ballotcounter = 0
            for result in poll_results:
                ballotcounter += 1
                if len(poll_results) > 1:
                    cell5b.append(Paragraph("%s. %s" % (ballotcounter, _("Vote")), stylesheet['Bold']))
                cell5b.append(Paragraph("%s: %s <br/> %s: %s <br/> %s: %s <br/> %s: %s <br/> %s: %s" % (_("Yes"), result[0], _("No"), result[1], _("Abstention"), result[2], _("Invalid"), result[3], _("Votes cast"), result[4]), stylesheet['Normal']))
                cell5b.append(Spacer(0,0.2*cm))
            data.append([cell5a,cell5b])

        t=Table(data)
        t._argW[0]=4.5*cm
        t._argW[1]=11*cm
        t.setStyle(TableStyle([ ('BOX', (0,0), (-1,-1), 1, colors.black),
                                ('VALIGN', (0,0), (-1,-1), 'TOP'),
                              ]))
        story.append(t)
        story.append(Spacer(0,1*cm))

        # title
        story.append(Paragraph(application.public_version.title, stylesheet['Heading3']))
        # text
        story.append(Paragraph("%s" % application.public_version.text.replace('\r\n','<br/>'), stylesheet['Paragraph']))
        # reason
        if application.public_version.reason:
            story.append(Paragraph(_("Reason")+":", stylesheet['Heading3']))
            story.append(Paragraph("%s" % application.public_version.reason.replace('\r\n','<br/>'), stylesheet['Paragraph']))
        return story


class ApplicationPollPDF(PDFView):
    permission_required = 'application.can_manage_application'
    top_space = 0

    def get(self, request, *args, **kwargs):
        self.poll = ApplicationPoll.objects.get(id=self.kwargs['poll_id'])
        return super(ApplicationPollPDF, self).get(request, *args, **kwargs)

    def get_filename(self):
        filename = u'%s%s_%s' % (_("Application"), str(self.poll.application.number), _("Poll"))
        return filename

    def get_template(self, buffer):
        return SimpleDocTemplate(buffer, topMargin=-6, bottomMargin=-6, leftMargin=0, rightMargin=0, showBoundary=False)

    def build_document(self, pdf_document, story):
        pdf_document.build(story)

    def append_to_pdf(self, story):
        imgpath = os.path.join(settings.SITE_ROOT, 'static/images/circle.png')
        circle = "<img src='%s' width='15' height='15'/>&nbsp;&nbsp;" % imgpath
        cell = []
        cell.append(Spacer(0,0.8*cm))
        cell.append(Paragraph(_("Application No.")+" "+str(self.poll.application.number), stylesheet['Ballot_title']))
        cell.append(Paragraph(self.poll.application.title, stylesheet['Ballot_subtitle']))
        cell.append(Paragraph(str(self.poll.get_ballot())+". "+_("Vote"), stylesheet['Ballot_description']))
        cell.append(Spacer(0,0.5*cm))
        cell.append(Paragraph(circle+_("Yes"), stylesheet['Ballot_option']))
        cell.append(Paragraph(circle+_("No"), stylesheet['Ballot_option']))
        cell.append(Paragraph(circle+_("Abstention"), stylesheet['Ballot_option']))
        data= []
        # get ballot papers config values
        ballot_papers_selection = config["application_pdf_ballot_papers_selection"]
        ballot_papers_number = config["application_pdf_ballot_papers_number"]

        # set number of ballot papers
        if ballot_papers_selection == "NUMBER_OF_DELEGATES":
            number = User.objects.filter(profile__type__iexact="delegate").count()
        elif ballot_papers_selection == "NUMBER_OF_ALL_PARTICIPANTS":
            number = int(Profile.objects.count())
        else: # ballot_papers_selection == "CUSTOM_NUMBER"
            number = int(ballot_papers_number)
        number = max(1, number)

        # print ballot papers
        if number > 0:
            for user in xrange(number/2):
                data.append([cell,cell])
            rest = number % 2
            if rest:
                data.append([cell,''])
            t=Table(data, 10.5*cm, 7.42*cm)
            t.setStyle(TableStyle([ ('GRID', (0,0), (-1,-1), 0.25, colors.grey),
                                ('VALIGN', (0,0), (-1,-1), 'TOP'),
                              ]))
            story.append(t)


class Config(FormView):
    permission_required = 'config.can_manage_config'
    form_class = ConfigForm
    template_name = 'application/config.html'

    def get_initial(self):
        return {
            'application_min_supporters': config['application_min_supporters'],
            'application_preamble': config['application_preamble'],
            'application_pdf_ballot_papers_selection': config['application_pdf_ballot_papers_selection'],
            'application_pdf_ballot_papers_number': config['application_pdf_ballot_papers_number'],
            'application_pdf_title': config['application_pdf_title'],
            'application_pdf_preamble': config['application_pdf_preamble'],
            'application_allow_trivial_change': config['application_allow_trivial_change'],
        }

    def form_valid(self, form):
        config['application_min_supporters'] = form.cleaned_data['application_min_supporters']
        config['application_preamble'] = form.cleaned_data['application_preamble']
        config['application_pdf_ballot_papers_selection'] = form.cleaned_data['application_pdf_ballot_papers_selection']
        config['application_pdf_ballot_papers_number'] = form.cleaned_data['application_pdf_ballot_papers_number']
        config['application_pdf_title'] = form.cleaned_data['application_pdf_title']
        config['application_pdf_preamble'] = form.cleaned_data['application_pdf_preamble']
        config['application_allow_trivial_change'] = form.cleaned_data['application_allow_trivial_change']
        messages.success(self.request, _('Application settings successfully saved.'))
        return super(Config, self).form_valid(form)


def register_tab(request):
    selected = True if request.path.startswith('/application/') else False
    return Tab(
        title=_('Applications'),
        url=reverse('application_overview'),
        permission=request.user.has_perm('application.can_see_application') or request.user.has_perm('application.can_support_application') or request.user.has_perm('application.can_support_application') or request.user.has_perm('application.can_manage_application'),
        selected=selected,
    )


def get_widgets(request):
    return [
        Widget(name='applications', template='application/widget.html',
               context={'applications': Application.objects.all()})
    ]