534 lines
21 KiB
Python
534 lines
21 KiB
Python
import base64
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from django.contrib.staticfiles import finders
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from django.db import IntegrityError, transaction
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from django.http import Http404
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from django.utils.translation import ugettext as _
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from django.utils.translation import ugettext_noop
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from rest_framework import status
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from ..core.config import config
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from ..utils.autoupdate import inform_changed_data
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from ..utils.rest_api import (
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DestroyModelMixin,
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GenericViewSet,
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ModelViewSet,
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Response,
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UpdateModelMixin,
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ValidationError,
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detail_route,
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)
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from ..utils.views import APIView
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from .access_permissions import (
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CategoryAccessPermissions,
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MotionAccessPermissions,
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MotionBlockAccessPermissions,
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MotionChangeRecommendationAccessPermissions,
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WorkflowAccessPermissions,
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)
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from .exceptions import WorkflowError
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from .models import (
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Category,
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Motion,
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MotionBlock,
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MotionChangeRecommendation,
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MotionPoll,
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MotionVersion,
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State,
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Workflow,
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)
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from .serializers import MotionPollSerializer
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# Viewsets for the REST API
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class MotionViewSet(ModelViewSet):
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"""
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API endpoint for motions.
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There are the following views: metadata, list, retrieve, create,
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partial_update, update, destroy, manage_version, support, set_state and
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create_poll.
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"""
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access_permissions = MotionAccessPermissions()
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queryset = Motion.objects.all()
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def check_view_permissions(self):
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"""
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Returns True if the user has required permissions.
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"""
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if self.action in ('list', 'retrieve'):
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result = self.get_access_permissions().check_permissions(self.request.user)
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elif self.action in ('metadata', 'partial_update', 'update'):
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result = self.request.user.has_perm('motions.can_see')
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# For partial_update and update requests the rest of the check is
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# done in the update method. See below.
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elif self.action == 'create':
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result = (self.request.user.has_perm('motions.can_see') and
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self.request.user.has_perm('motions.can_create') and
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(not config['motions_stop_submitting'] or
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self.request.user.has_perm('motions.can_manage')))
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elif self.action in ('destroy', 'manage_version', 'set_state', 'set_recommendation', 'create_poll'):
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result = (self.request.user.has_perm('motions.can_see') and
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self.request.user.has_perm('motions.can_manage'))
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elif self.action == 'support':
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result = (self.request.user.has_perm('motions.can_see') and
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self.request.user.has_perm('motions.can_support'))
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else:
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result = False
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return result
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def create(self, request, *args, **kwargs):
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"""
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Customized view endpoint to create a new motion.
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"""
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# Check permission to send submitter and supporter data.
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if (not request.user.has_perm('motions.can_manage') and
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(request.data.get('submitters_id') or request.data.get('supporters_id'))):
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# Non-staff users are not allowed to send submitter or supporter data.
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self.permission_denied(request)
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# TODO: Should non staff users be allowed to set motions to blocks or send categories, ...? #2506
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# Check permission to send comment data.
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if not request.user.has_perm('motions.can_see_and_manage_comments'):
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try:
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# Ignore comments data if user is not allowed to send comments.
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del request.data['comments']
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except KeyError:
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# No comments here. Just do nothing.
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pass
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# Validate data and create motion.
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serializer = self.get_serializer(data=request.data)
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serializer.is_valid(raise_exception=True)
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motion = serializer.save(request_user=request.user)
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# Write the log message and initiate response.
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motion.write_log([ugettext_noop('Motion created')], request.user)
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headers = self.get_success_headers(serializer.data)
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return Response(serializer.data, status=status.HTTP_201_CREATED, headers=headers)
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def update(self, request, *args, **kwargs):
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"""
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Customized view endpoint to update a motion.
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Checks also whether the requesting user can update the motion. He
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needs at least the permissions 'motions.can_see' (see
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self.check_view_permissions()). Also the instance method
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get_allowed_actions() is evaluated.
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"""
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# Get motion.
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motion = self.get_object()
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# Check permissions.
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if not motion.get_allowed_actions(request.user)['update']:
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self.permission_denied(request)
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# Check permission to send only some data.
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if not request.user.has_perm('motions.can_manage'):
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whitelist = (
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'title',
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'text',
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'reason',)
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keys = list(request.data.keys())
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for key in keys:
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if key not in whitelist:
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# Non-staff users are allowed to send only some data. Ignore other data.
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del request.data[key]
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if not request.user.has_perm('motions.can_see_and_manage_comments'):
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try:
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del request.data['comments']
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except KeyError:
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# No comments here. Just do nothing.
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pass
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# Validate data and update motion.
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serializer = self.get_serializer(
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motion,
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data=request.data,
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partial=kwargs.get('partial', False))
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serializer.is_valid(raise_exception=True)
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updated_motion = serializer.save(disable_versioning=request.data.get('disable_versioning'))
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# Write the log message, check removal of supporters and initiate response.
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# TODO: Log if a version was updated.
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updated_motion.write_log([ugettext_noop('Motion updated')], request.user)
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if (config['motions_remove_supporters'] and updated_motion.state.allow_support and
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not request.user.has_perm('motions.can_manage')):
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updated_motion.supporters.clear()
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updated_motion.write_log([ugettext_noop('All supporters removed')], request.user)
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return Response(serializer.data)
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@detail_route(methods=['put', 'delete'])
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def manage_version(self, request, pk=None):
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"""
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Special view endpoint to permit and delete a version of a motion.
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Send PUT {'version_number': <number>} to permit and DELETE
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{'version_number': <number>} to delete a version. Deleting the
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active version is not allowed. Only managers can use this view.
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"""
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# Retrieve motion and version.
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motion = self.get_object()
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version_number = request.data.get('version_number')
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try:
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version = motion.versions.get(version_number=version_number)
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except MotionVersion.DoesNotExist:
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raise Http404('Version %s not found.' % version_number)
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# Permit or delete version.
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if request.method == 'PUT':
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# Permit version.
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motion.active_version = version
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motion.save(update_fields=['active_version'])
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motion.write_log(
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message_list=[ugettext_noop('Version'),
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' %d ' % version.version_number,
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ugettext_noop('permitted')],
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person=self.request.user)
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message = _('Version %d permitted successfully.') % version.version_number
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else:
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# Delete version.
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# request.method == 'DELETE'
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if version == motion.active_version:
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raise ValidationError({'detail': _('You can not delete the active version of a motion.')})
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version.delete()
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motion.write_log(
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message_list=[ugettext_noop('Version'),
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' %d ' % version.version_number,
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ugettext_noop('deleted')],
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person=self.request.user)
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message = _('Version %d deleted successfully.') % version.version_number
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# Initiate response.
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return Response({'detail': message})
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@detail_route(methods=['post', 'delete'])
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def support(self, request, pk=None):
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"""
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Special view endpoint to support a motion or withdraw support
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(unsupport).
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Send POST to support and DELETE to unsupport.
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"""
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# Retrieve motion and allowed actions.
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motion = self.get_object()
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allowed_actions = motion.get_allowed_actions(request.user)
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# Support or unsupport motion.
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if request.method == 'POST':
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# Support motion.
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if not allowed_actions['support']:
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raise ValidationError({'detail': _('You can not support this motion.')})
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motion.supporters.add(request.user)
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motion.write_log([ugettext_noop('Motion supported')], request.user)
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message = _('You have supported this motion successfully.')
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else:
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# Unsupport motion.
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# request.method == 'DELETE'
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if not allowed_actions['unsupport']:
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raise ValidationError({'detail': _('You can not unsupport this motion.')})
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motion.supporters.remove(request.user)
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motion.write_log([ugettext_noop('Motion unsupported')], request.user)
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message = _('You have unsupported this motion successfully.')
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# Initiate response.
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return Response({'detail': message})
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@detail_route(methods=['put'])
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def set_state(self, request, pk=None):
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"""
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Special view endpoint to set and reset a state of a motion.
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Send PUT {'state': <state_id>} to set and just PUT {} to reset the
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state. Only managers can use this view.
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"""
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# Retrieve motion and state.
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motion = self.get_object()
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state = request.data.get('state')
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# Set or reset state.
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if state is not None:
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# Check data and set state.
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try:
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state_id = int(state)
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except ValueError:
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raise ValidationError({'detail': _('Invalid data. State must be an integer.')})
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if state_id not in [item.id for item in motion.state.next_states.all()]:
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raise ValidationError(
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{'detail': _('You can not set the state to %(state_id)d.') % {'state_id': state_id}})
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motion.set_state(state_id)
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else:
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# Reset state.
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motion.reset_state()
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# Save motion.
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motion.save(update_fields=['state', 'identifier'])
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message = _('The state of the motion was set to %s.') % motion.state.name
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# Write the log message and initiate response.
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motion.write_log(
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message_list=[ugettext_noop('State set to'), ' ', motion.state.name],
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person=request.user)
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return Response({'detail': message})
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@detail_route(methods=['put'])
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def set_recommendation(self, request, pk=None):
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"""
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Special view endpoint to set a recommendation of a motion.
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Send PUT {'recommendation': <state_id>} to set and just PUT {} to
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reset the recommendation. Only managers can use this view.
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"""
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# Retrieve motion and recommendation state.
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motion = self.get_object()
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recommendation_state = request.data.get('recommendation')
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# Set or reset recommendation.
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if recommendation_state is not None:
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# Check data and set recommendation.
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try:
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recommendation_state_id = int(recommendation_state)
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except ValueError:
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raise ValidationError({'detail': _('Invalid data. Recommendation must be an integer.')})
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recommendable_states = State.objects.filter(workflow=motion.workflow, recommendation_label__isnull=False)
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if recommendation_state_id not in [item.id for item in recommendable_states]:
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raise ValidationError(
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{'detail': _('You can not set the recommendation to {recommendation_state_id}.').format(
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recommendation_state_id=recommendation_state_id)})
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motion.set_recommendation(recommendation_state_id)
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else:
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# Reset recommendation.
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motion.recommendation = None
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# Save motion.
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motion.save(update_fields=['recommendation'])
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label = motion.recommendation.recommendation_label if motion.recommendation else 'None'
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message = _('The recommendation of the motion was set to %s.') % label
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# Write the log message and initiate response.
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motion.write_log(
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message_list=[ugettext_noop('Recommendation set to'), ' ', label],
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person=request.user)
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return Response({'detail': message})
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@detail_route(methods=['post'])
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def create_poll(self, request, pk=None):
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"""
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View to create a poll. It is a POST request without any data.
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"""
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motion = self.get_object()
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try:
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with transaction.atomic():
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motion.create_poll()
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except WorkflowError as e:
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raise ValidationError({'detail': e})
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return Response({'detail': _('Vote created successfully.')})
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class MotionPollViewSet(UpdateModelMixin, DestroyModelMixin, GenericViewSet):
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"""
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API endpoint for motion polls.
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There are the following views: update and destroy.
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"""
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queryset = MotionPoll.objects.all()
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serializer_class = MotionPollSerializer
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def check_view_permissions(self):
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"""
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Returns True if the user has required permissions.
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"""
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return (self.request.user.has_perm('motions.can_see') and
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self.request.user.has_perm('motions.can_manage'))
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class MotionChangeRecommendationViewSet(ModelViewSet):
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"""
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API endpoint for motion change recommendations.
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There are the following views: metadata, list, retrieve, create,
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partial_update, update and destroy.
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"""
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access_permissions = MotionChangeRecommendationAccessPermissions()
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queryset = MotionChangeRecommendation.objects.all()
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def check_view_permissions(self):
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"""
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Returns True if the user has required permissions.
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"""
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if self.action in ('list', 'retrieve'):
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result = self.get_access_permissions().check_permissions(self.request.user)
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elif self.action == 'metadata':
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result = self.request.user.has_perm('motions.can_see')
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elif self.action in ('create', 'destroy', 'partial_update', 'update'):
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result = self.request.user.has_perm('motions.can_manage')
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else:
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result = False
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return result
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class CategoryViewSet(ModelViewSet):
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"""
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API endpoint for categories.
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There are the following views: metadata, list, retrieve, create,
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partial_update, update, destroy and numbering.
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"""
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access_permissions = CategoryAccessPermissions()
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queryset = Category.objects.all()
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def check_view_permissions(self):
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"""
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Returns True if the user has required permissions.
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"""
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if self.action in ('list', 'retrieve'):
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result = self.get_access_permissions().check_permissions(self.request.user)
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elif self.action == 'metadata':
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result = self.request.user.has_perm('motions.can_see')
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elif self.action in ('create', 'partial_update', 'update', 'destroy', 'numbering'):
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result = (self.request.user.has_perm('motions.can_see') and
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self.request.user.has_perm('motions.can_manage'))
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else:
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result = False
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return result
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@detail_route(methods=['post'])
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def numbering(self, request, pk=None):
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"""
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Special view endpoint to number all motions in this category.
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Only managers can use this view.
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Send POST {'motions': [<list of motion ids>]} to sort the given
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motions in a special order. Ids of motions which do not belong to
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the category are just ignored. Send just POST {} to sort all
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motions in the category by id.
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"""
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category = self.get_object()
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number = 0
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if not category.prefix:
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prefix = ''
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else:
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prefix = '%s ' % category.prefix
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motions = category.motion_set.all()
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motion_list = request.data.get('motions')
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if motion_list:
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motion_dict = {}
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for motion in motions.filter(id__in=motion_list):
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motion_dict[motion.pk] = motion
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motions = [motion_dict[pk] for pk in motion_list]
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try:
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with transaction.atomic():
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for motion in motions:
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motion.identifier = None
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motion.save()
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for motion in motions:
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if motion.is_amendment():
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parent_identifier = motion.parent.identifier or ''
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prefix = '%s %s ' % (parent_identifier, config['motions_amendments_prefix'])
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number += 1
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identifier = '%s%d' % (prefix, number)
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motion.identifier = identifier
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motion.identifier_number = number
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motion.save()
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except IntegrityError:
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message = _('Error: At least one identifier of this category does '
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'already exist in another category.')
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response = Response({'detail': message}, status_code=400)
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else:
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message = _('All motions in category {category} numbered '
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'successfully.').format(category=category)
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response = Response({'detail': message})
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return response
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class MotionBlockViewSet(ModelViewSet):
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"""
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API endpoint for motion blocks.
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There are the following views: metadata, list, retrieve, create,
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partial_update, update and destroy.
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"""
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access_permissions = MotionBlockAccessPermissions()
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queryset = MotionBlock.objects.all()
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def check_view_permissions(self):
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"""
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Returns True if the user has required permissions.
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"""
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if self.action in ('list', 'retrieve'):
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result = self.get_access_permissions().check_permissions(self.request.user)
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elif self.action == 'metadata':
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result = self.request.user.has_perm('motions.can_see')
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elif self.action in ('create', 'partial_update', 'update', 'destroy', 'follow_recommendations'):
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result = (self.request.user.has_perm('motions.can_see') and
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self.request.user.has_perm('motions.can_manage'))
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else:
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result = False
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return result
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@detail_route(methods=['post'])
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def follow_recommendations(self, request, pk=None):
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"""
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View to set the states of all motions of this motion block each to
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its recommendation. It is a POST request without any data.
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"""
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motion_block = self.get_object()
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instances = []
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with transaction.atomic():
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for motion in motion_block.motion_set.all():
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# Follow recommendation.
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motion.follow_recommendation()
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motion.save(skip_autoupdate=True)
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# Write the log message.
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motion.write_log(
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message_list=[ugettext_noop('State set to'), ' ', motion.state.name],
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person=request.user,
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skip_autoupdate=True)
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instances.append(motion)
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inform_changed_data(instances)
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return Response({'detail': _('Followed recommendations successfully.')})
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class WorkflowViewSet(ModelViewSet):
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"""
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API endpoint for workflows.
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There are the following views: metadata, list, retrieve, create,
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partial_update, update and destroy.
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"""
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access_permissions = WorkflowAccessPermissions()
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queryset = Workflow.objects.all()
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def check_view_permissions(self):
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"""
|
|
Returns True if the user has required permissions.
|
|
"""
|
|
if self.action in ('list', 'retrieve'):
|
|
result = self.get_access_permissions().check_permissions(self.request.user)
|
|
elif self.action == 'metadata':
|
|
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
|
|
|
|
|
|
class MotionDocxTemplateView(APIView):
|
|
"""
|
|
Returns the template for motions docx export
|
|
"""
|
|
http_method_names = ['get']
|
|
|
|
def get_context_data(self, **context):
|
|
with open(finders.find('templates/docx/motions.docx'), "rb") as file:
|
|
response = base64.b64encode(file.read())
|
|
return response
|