OpenSlides/openslides/motions/views.py

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from django.db import transaction
from django.http import Http404
from django.utils.text import slugify
from django.utils.translation import ugettext as _
from django.utils.translation import ugettext_noop
from reportlab.platypus import SimpleDocTemplate
from rest_framework import status
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from openslides.core.config import config
from openslides.utils.rest_api import (
DestroyModelMixin,
GenericViewSet,
ModelViewSet,
Response,
UpdateModelMixin,
ValidationError,
detail_route,
)
from openslides.utils.views import PDFView, SingleObjectMixin
from .access_permissions import (
CategoryAccessPermissions,
MotionAccessPermissions,
WorkflowAccessPermissions,
)
from .exceptions import WorkflowError
from .models import Category, Motion, MotionPoll, MotionVersion, Workflow
from .pdf import motion_poll_to_pdf, motion_to_pdf, motions_to_pdf
from .serializers import MotionPollSerializer
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# Viewsets for the REST API
class MotionViewSet(ModelViewSet):
"""
API endpoint for motions.
There are the following views: metadata, list, retrieve, create,
partial_update, update, destroy, manage_version, support, set_state and
create_poll.
"""
access_permissions = MotionAccessPermissions()
queryset = Motion.objects.all()
def check_view_permissions(self):
"""
Returns True if the user has required permissions.
"""
if self.action == 'retrieve':
result = self.get_access_permissions().can_retrieve(self.request.user)
elif self.action in ('metadata', 'list', 'partial_update', 'update'):
result = self.request.user.has_perm('motions.can_see')
# For partial_update and update requests the rest of the check is
# done in the update method. See below.
elif self.action == 'create':
result = (self.request.user.has_perm('motions.can_see') and
self.request.user.has_perm('motions.can_create') and
(not config['motions_stop_submitting'] or
self.request.user.has_perm('motions.can_manage')))
elif self.action in ('destroy', 'manage_version', 'set_state', 'create_poll'):
result = (self.request.user.has_perm('motions.can_see') and
self.request.user.has_perm('motions.can_manage'))
elif self.action == 'support':
result = (self.request.user.has_perm('motions.can_see') and
self.request.user.has_perm('motions.can_support'))
else:
result = False
return result
def create(self, request, *args, **kwargs):
"""
Customized view endpoint to create a new motion.
"""
# Check permission to send submitter and supporter data.
if (not request.user.has_perm('motions.can_manage') and
(request.data.get('submitters_id') or request.data.get('supporters_id'))):
# Non-staff users are not allowed to send submitter or supporter data.
self.permission_denied(request)
# Validate data and create motion.
serializer = self.get_serializer(data=request.data)
serializer.is_valid(raise_exception=True)
motion = serializer.save(request_user=request.user)
# Write the log message and initiate response.
motion.write_log([ugettext_noop('Motion created')], request.user)
headers = self.get_success_headers(serializer.data)
return Response(serializer.data, status=status.HTTP_201_CREATED, headers=headers)
def update(self, request, *args, **kwargs):
"""
Customized view endpoint to update a motion.
Checks also whether the requesting user can update the motion. He
needs at least the permissions 'motions.can_see' (see
self.check_view_permissions()). Also the instance method
get_allowed_actions() is evaluated.
"""
# Get motion.
motion = self.get_object()
# Check permissions.
if not motion.get_allowed_actions(request.user)['update']:
self.permission_denied(request)
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# Check permission to send only some data.
if not request.user.has_perm('motions.can_manage'):
whitelist = (
'title',
'text',
'reason',)
keys = list(request.data.keys())
for key in keys:
if key not in whitelist:
# Non-staff users are allowed to send only some data. Ignore other data.
del request.data[key]
# Validate data and update motion.
serializer = self.get_serializer(
motion,
data=request.data,
partial=kwargs.get('partial', False))
serializer.is_valid(raise_exception=True)
updated_motion = serializer.save(disable_versioning=request.data.get('disable_versioning'))
# Write the log message, check removal of supporters and initiate response.
# TODO: Log if a version was updated.
updated_motion.write_log([ugettext_noop('Motion updated')], request.user)
if (config['motions_remove_supporters'] and updated_motion.state.allow_support and
not request.user.has_perm('motions.can_manage')):
updated_motion.supporters.clear()
updated_motion.write_log([ugettext_noop('All supporters removed')], request.user)
return Response(serializer.data)
@detail_route(methods=['put', 'delete'])
def manage_version(self, request, pk=None):
"""
Special view endpoint to permit and delete a version of a motion.
Send PUT {'version_number': <number>} to permit and DELETE
{'version_number': <number>} to delete a version. Deleting the
active version is not allowed. Only managers can use this view.
"""
# Retrieve motion and version.
motion = self.get_object()
version_number = request.data.get('version_number')
try:
version = motion.versions.get(version_number=version_number)
except MotionVersion.DoesNotExist:
raise Http404('Version %s not found.' % version_number)
# Permit or delete version.
if request.method == 'PUT':
# Permit version.
motion.active_version = version
motion.save(update_fields=['active_version'])
motion.write_log(
message_list=[ugettext_noop('Version'),
' %d ' % version.version_number,
ugettext_noop('permitted')],
person=self.request.user)
message = _('Version %d permitted successfully.') % version.version_number
else:
# Delete version.
# request.method == 'DELETE'
if version == motion.active_version:
raise ValidationError({'detail': _('You can not delete the active version of a motion.')})
version.delete()
motion.write_log(
message_list=[ugettext_noop('Version'),
' %d ' % version.version_number,
ugettext_noop('deleted')],
person=self.request.user)
message = _('Version %d deleted successfully.') % version.version_number
# Initiate response.
return Response({'detail': message})
@detail_route(methods=['post', 'delete'])
def support(self, request, pk=None):
"""
Special view endpoint to support a motion or withdraw support
(unsupport).
Send POST to support and DELETE to unsupport.
"""
# Retrieve motion and allowed actions.
motion = self.get_object()
allowed_actions = motion.get_allowed_actions(request.user)
# Support or unsupport motion.
if request.method == 'POST':
# Support motion.
if not allowed_actions['support']:
raise ValidationError({'detail': _('You can not support this motion.')})
motion.supporters.add(request.user)
motion.write_log([ugettext_noop('Motion supported')], request.user)
message = _('You have supported this motion successfully.')
else:
# Unsupport motion.
# request.method == 'DELETE'
if not allowed_actions['unsupport']:
raise ValidationError({'detail': _('You can not unsupport this motion.')})
motion.supporters.remove(request.user)
motion.write_log([ugettext_noop('Motion unsupported')], request.user)
message = _('You have unsupported this motion successfully.')
# Initiate response.
return Response({'detail': message})
@detail_route(methods=['put'])
def set_state(self, request, pk=None):
"""
Special view endpoint to set and reset a state of a motion.
Send PUT {'state': <state_id>} to set and just PUT {} to reset the
state. Only managers can use this view.
"""
# Retrieve motion and state.
motion = self.get_object()
state = request.data.get('state')
# Set or reset state.
if state is not None:
# Check data and set state.
try:
state_id = int(state)
except ValueError:
raise ValidationError({'detail': _('Invalid data. State must be an integer.')})
if state_id not in [item.id for item in motion.state.next_states.all()]:
raise ValidationError(
{'detail': _('You can not set the state to %(state_id)d.') % {'state_id': state_id}})
motion.set_state(state_id)
else:
# Reset state.
motion.reset_state()
# Save motion.
motion.save(update_fields=['state', 'identifier'])
message = _('The state of the motion was set to %s.') % motion.state.name
# Write the log message and initiate response.
motion.write_log(
message_list=[ugettext_noop('State set to'), ' ', motion.state.name],
person=request.user)
return Response({'detail': message})
@detail_route(methods=['post'])
def create_poll(self, request, pk=None):
"""
View to create a poll. It is a POST request without any data.
"""
motion = self.get_object()
try:
with transaction.atomic():
motion.create_poll()
except WorkflowError as e:
raise ValidationError({'detail': e})
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return Response({'detail': _('Vote created successfully.')})
class MotionPollViewSet(UpdateModelMixin, DestroyModelMixin, GenericViewSet):
"""
API endpoint for motion polls.
There are the following views: update and destroy.
"""
queryset = MotionPoll.objects.all()
serializer_class = MotionPollSerializer
def check_view_permissions(self):
"""
Returns True if the user has required permissions.
"""
return (self.request.user.has_perm('motions.can_see') and
self.request.user.has_perm('motions.can_manage'))
class CategoryViewSet(ModelViewSet):
"""
API endpoint for categories.
There are the following views: metadata, list, retrieve, create,
partial_update, update and destroy.
"""
access_permissions = CategoryAccessPermissions()
queryset = Category.objects.all()
def check_view_permissions(self):
"""
Returns True if the user has required permissions.
"""
if self.action == 'retrieve':
result = self.get_access_permissions().can_retrieve(self.request.user)
elif self.action in ('metadata', 'list'):
result = self.request.user.has_perm('motions.can_see')
elif self.action in ('create', 'partial_update', 'update', 'destroy', 'numbering'):
result = (self.request.user.has_perm('motions.can_see') and
self.request.user.has_perm('motions.can_manage'))
else:
result = False
return result
@detail_route(methods=['post'])
def numbering(self, request, pk=None):
"""
Special view endpoint to number all motions in this category.
Only managers can use this view.
"""
category = self.get_object()
number = 0
if not category.prefix:
prefix = ''
else:
prefix = '%s ' % category.prefix
with transaction.atomic():
for motion in category.motion_set.all():
motion.identifier = None
motion.save()
for motion in category.motion_set.all():
if motion.is_amendment():
parent_identifier = motion.parent.identifier or ''
prefix = '%s %s ' % (parent_identifier, config['motions_amendments_prefix'])
number += 1
identifier = '%s%d' % (prefix, number)
motion.identifier = identifier
motion.identifier_number = number
motion.save()
message = _('All motions in category {category} numbered '
'successfully.').format(category=category)
return Response({'detail': message})
class WorkflowViewSet(ModelViewSet):
"""
API endpoint for workflows.
There are the following views: metadata, list, retrieve, create,
partial_update, update and destroy.
"""
access_permissions = WorkflowAccessPermissions()
queryset = Workflow.objects.all()
def check_view_permissions(self):
"""
Returns True if the user has required permissions.
"""
if self.action == 'retrieve':
result = self.get_access_permissions().can_retrieve(self.request.user)
elif self.action in ('metadata', 'list'):
result = self.request.user.has_perm('motions.can_see')
elif self.action in ('create', 'partial_update', 'update', 'destroy'):
result = (self.request.user.has_perm('motions.can_see') and
self.request.user.has_perm('motions.can_manage'))
else:
result = False
return result
# Views to generate PDFs
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class MotionPollPDF(PDFView):
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"""
Generates a ballotpaper.
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"""
required_permission = 'motions.can_manage'
top_space = 0
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def get(self, request, *args, **kwargs):
self.poll = MotionPoll.objects.get(pk=self.kwargs['poll_pk'])
return super().get(request, *args, **kwargs)
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def get_filename(self):
"""
Return the filename for the PDF.
"""
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return u'%s_%s' % (_("Motion"), _("Vote"))
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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)
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def append_to_pdf(self, pdf):
"""
Append PDF objects.
"""
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motion_poll_to_pdf(pdf, self.poll)
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class MotionPDFView(SingleObjectMixin, PDFView):
"""
Create the PDF for one or for all motions.
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If self.print_all_motions is True, the view returns a PDF with all motions.
If self.print_all_motions is False, the view returns a PDF with only one
motion.
"""
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model = Motion
top_space = 0
print_all_motions = False
def check_permission(self, request, *args, **kwargs):
"""
Checks if the requesting user has the permission to see the motion as
PDF.
"""
if self.print_all_motions:
is_allowed = request.user.has_perm('motions.can_see')
else:
is_allowed = self.get_object().get_allowed_actions(request.user)['see']
return is_allowed
def get_object(self, *args, **kwargs):
if self.print_all_motions:
obj = None
else:
obj = super().get_object(*args, **kwargs)
return obj
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def get_filename(self):
"""
Return the filename for the PDF.
"""
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if self.print_all_motions:
return _("Motions")
else:
if self.get_object().identifier:
suffix = self.get_object().identifier.replace(' ', '')
else:
suffix = self.get_object().title.replace(' ', '_')
suffix = slugify(suffix)
return '%s-%s' % (_("Motion"), suffix)
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def append_to_pdf(self, pdf):
"""
Append PDF objects.
"""
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if self.print_all_motions:
motions = []
for motion in Motion.objects.all():
if (not motion.state.required_permission_to_see or
self.request.user.has_perm(motion.state.required_permission_to_see)):
motions.append(motion)
motions_to_pdf(pdf, motions)
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else:
motion_to_pdf(pdf, self.get_object())