OpenSlides/openslides/motion/views.py

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

    Views for the motion app.

    :copyright: 2011, 2012 by the OpenSlides team, see AUTHORS.
    :license: GNU GPL, see LICENSE for more details.
"""
from reportlab.platypus import Paragraph

from django.core.urlresolvers import reverse
from django.contrib import messages
from django.db import transaction
from django.db.models import Model
from django.utils.translation import ugettext as _, ugettext_lazy
from django.views.generic.detail import SingleObjectMixin
from django.http import Http404

from openslides.utils.pdf import stylesheet
from openslides.utils.views import (
    TemplateView, RedirectView, UpdateView, CreateView, DeleteView, PDFView,
    DetailView, ListView, FormView, QuestionMixin, SingleObjectMixin)
from openslides.utils.template import Tab
from openslides.utils.utils import html_strong
from openslides.poll.views import PollFormView
from openslides.projector.api import get_active_slide
from openslides.projector.projector import Widget, SLIDE
from openslides.config.models import config
from .models import Motion, MotionSubmitter, MotionSupporter, MotionPoll
from .forms import (BaseMotionForm, MotionSubmitterMixin, MotionSupporterMixin,
                    MotionCreateNewVersionMixin, ConfigForm)
from .workflow import WorkflowError

class MotionListView(ListView):
    """
    List all motion.
    """
    permission_required = 'motion.can_see_motion'
    model = Motion

motion_list = MotionListView.as_view()


class MotionDetailView(DetailView):
    """
    Show the details of one motion.
    """
    permission_required = 'motion.can_see_motion'
    model = Motion
    template_name = 'motion/motion_detail.html'

    def get_object(self):
        object = super(MotionDetailView, self).get_object()
        version_id = self.kwargs.get('version_id', None)
        if version_id is not None:
            try:
                object.version = int(version_id) -1
            except IndexError:
                raise Http404
        return object

motion_detail = MotionDetailView.as_view()


class MotionMixin(object):
    """
    Mixin to add save the version-data to the motion-object
    """
    def manipulate_object(self, form):
        super(MotionMixin, self).manipulate_object(form)
        for attr in ['title', 'text', 'reason']:
            setattr(self.object, attr, form.cleaned_data[attr])

        try:
            if form.cleaned_data['new_version']:
                self.object.new_version
        except KeyError:
            pass

    def post_save(self, form):
        super(MotionMixin, self).post_save(form)
        # TODO: only delete and save neccessary submitters and supporter
        if 'submitter' in form.cleaned_data:
            self.object.submitter.all().delete()
            MotionSubmitter.objects.bulk_create(
                [MotionSubmitter(motion=self.object, person=person)
                 for person in form.cleaned_data['submitter']])
        if 'supporter' in form.cleaned_data:
            self.object.supporter.all().delete()
            MotionSupporter.objects.bulk_create(
                [MotionSupporter(motion=self.object, person=person)
                 for person in form.cleaned_data['supporter']])

    def get_form_class(self):
        form_classes = [BaseMotionForm]
        if self.request.user.has_perm('motion.can_manage_motion'):
            form_classes.append(MotionSubmitterMixin)
            if config['motion_min_supporters'] > 0:
                form_classes.append(MotionSupporterMixin)
        if config['motion_create_new_version'] == 'ASK_USER':
            form_classes.append(MotionCreateNewVersionMixin)
        return type('MotionForm', tuple(form_classes), {})


class MotionCreateView(MotionMixin, CreateView):
    """
    Create a motion.
    """
    permission_required = 'motion.can_create_motion'
    model = Motion

motion_create = MotionCreateView.as_view()


class MotionUpdateView(MotionMixin, UpdateView):
    """
    Update a motion.
    """
    # TODO: set permissions
    model = Motion

motion_edit = MotionUpdateView.as_view()


class SupportView(SingleObjectMixin, QuestionMixin, RedirectView):
    """
    Classed based view to support or unsupport a motion. Use
    support=True or support=False in urls.py
    """
    permission_required = 'motion.can_support_motion'
    model = Motion
    support = True

    def get(self, request, *args, **kwargs):
        self.object = self.get_object()
        return super(SupportView, self).get(request, *args, **kwargs)

    def check_allowed_actions(self, request):
        """
        Checks whether request.user can support or unsupport the motion.
        Returns True or False.
        """
        return True #TODO
        allowed_actions = self.object.get_allowed_actions(request.user)
        if self.support and not 'support' in allowed_actions:
            messages.error(request, _('You can not support this motion.'))
            return False
        elif not self.support and not 'unsupport' in allowed_actions:
            messages.error(request, _('You can not unsupport this motion.'))
            return False
        else:
            return True

    def pre_redirect(self, request, *args, **kwargs):
        if self.check_allowed_actions(request):
            super(SupportView, self).pre_redirect(request, *args, **kwargs)

    def get_question(self):
        if self.support:
            return _('Do you really want to support this motion?')
        else:
            return _('Do you really want to unsupport this motion?')

    def case_yes(self):
        if self.check_allowed_actions(self.request):
            if self.support:
                self.object.support(person=self.request.user)
            else:
                self.object.unsupport(person=self.request.user)

    def get_success_message(self):
        if self.support:
            return _("You have supported this motion successfully.")
        else:
            return _("You have unsupported this motion successfully.")

    def get_redirect_url(self, **kwargs):
        return self.object.get_absolute_url()

motion_support = SupportView.as_view(support=True)
motion_unsupport = SupportView.as_view(support=False)


class PollCreateView(SingleObjectMixin, RedirectView):
    permission_required = 'motion.can_manage_motion'
    model = Motion

    def get(self, request, *args, **kwargs):
        self.object = self.get_object()
        return super(PollCreateView, self).get(request, *args, **kwargs)

    def pre_redirect(self, request, *args, **kwargs):
        self.poll = self.object.create_poll()
        messages.success(request, _("New vote was successfully created."))

    def get_redirect_url(self, **kwargs):
        return reverse('motion_poll_edit', args=[self.object.pk, self.poll.poll_number])

poll_create = PollCreateView.as_view()


class PollMixin(object):
    permission_required = 'motion.can_manage_motion'
    success_url_name = 'motion_detail'

    def get_object(self):
        return MotionPoll.objects.filter(
            motion=self.kwargs['pk'],
            poll_number=self.kwargs['poll_number']).get()

    def get_url_name_args(self):
        return [self.object.motion.pk]


class PollUpdateView(PollMixin, PollFormView):
    poll_class = MotionPoll
    template_name = 'motion/poll_form.html'

    def get_context_data(self, **kwargs):
        context = super(PollUpdateView, self).get_context_data(**kwargs)
        context.update({
            'motion': self.poll.motion})
        return context

poll_edit = PollUpdateView.as_view()


class PollDeleteView(PollMixin, DeleteView):
    model = MotionPoll

poll_delete = PollDeleteView.as_view()


class MotionSetStateView(SingleObjectMixin, RedirectView):
    permission_required = 'motion.can_manage_motion'
    url_name = 'motion_detail'
    model = Motion
    reset = False

    def pre_redirect(self, request, *args, **kwargs):
        self.object = self.get_object()
        try:
            if self.reset:
                self.object.reset_state()
            else:
                self.object.state = kwargs['state']
        except WorkflowError:
            messages.error(request, _('Can not set the state to: %s.')
                                      % html_strong(kwargs['state']))
        else:
            self.object.save()
            messages.success(request, _('Motion status was set to: %s.'
                                        % html_strong(self.object.state)))

    def get_url_name_args(self):
        return [self.object.pk]

set_state = MotionSetStateView.as_view()
reset_state = MotionSetStateView.as_view(reset=True)


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

    def get_initial(self):
        return {
            'motion_min_supporters': config['motion_min_supporters'],
            'motion_preamble': config['motion_preamble'],
            'motion_pdf_ballot_papers_selection': config['motion_pdf_ballot_papers_selection'],
            'motion_pdf_ballot_papers_number': config['motion_pdf_ballot_papers_number'],
            'motion_pdf_title': config['motion_pdf_title'],
            'motion_pdf_preamble': config['motion_pdf_preamble'],
            'motion_create_new_version': config['motion_create_new_version'],
            'motion_workflow': config['motion_workflow'],
        }

    def form_valid(self, form):
        config['motion_min_supporters'] = form.cleaned_data['motion_min_supporters']
        config['motion_preamble'] = form.cleaned_data['motion_preamble']
        config['motion_pdf_ballot_papers_selection'] = form.cleaned_data['motion_pdf_ballot_papers_selection']
        config['motion_pdf_ballot_papers_number'] = form.cleaned_data['motion_pdf_ballot_papers_number']
        config['motion_pdf_title'] = form.cleaned_data['motion_pdf_title']
        config['motion_pdf_preamble'] = form.cleaned_data['motion_pdf_preamble']
        config['motion_create_new_version'] = form.cleaned_data['motion_create_new_version']
        config['motion_workflow'] = form.cleaned_data['motion_workflow']
        messages.success(self.request, _('Motion settings successfully saved.'))
        return super(Config, self).form_valid(form)


def register_tab(request):
    """
    Register the projector tab.
    """
    selected = request.path.startswith('/motion/')
    return Tab(
        title=_('Motions'),
        url=reverse('motion_list'),
        permission=request.user.has_perm('motion.can_see_motion'),
        selected=selected,
    )