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from collections import Counter
from django.conf import settings
from django.shortcuts import get_object_or_404, redirect
from django_filters.rest_framework import DjangoFilterBackend
from django.db.models import Count, F
from libcloud.base import DriverType, get_driver
from libcloud.storage.types import ContainerDoesNotExistError, ObjectDoesNotExistError
from rest_framework import generics, filters, status
from rest_framework.exceptions import ParseError, ValidationError
from rest_framework.permissions import IsAuthenticated, IsAdminUser
from rest_framework.response import Response
from rest_framework.views import APIView
from rest_framework.parsers import MultiPartParser
from rest_framework_csv.renderers import CSVRenderer
from .filters import DocumentFilter
from .models import Project, Label, Document
from .permissions import IsAdminUserAndWriteOnly, IsProjectUser, IsOwnAnnotation
from .serializers import ProjectSerializer, LabelSerializer, DocumentSerializer, UserSerializer
from .serializers import ProjectPolymorphicSerializer
from .utils import CSVParser, JSONParser, PlainTextParser, CoNLLParser, iterable_to_io
from .utils import JSONLRenderer
from .utils import JSONPainter, CSVPainter
class Me(APIView):
permission_classes = (IsAuthenticated,)
def get(self, request, *args, **kwargs):
serializer = UserSerializer(request.user, context={'request': request})
return Response(serializer.data)
class Features(APIView):
permission_classes = (IsAuthenticated,)
def get(self, request, *args, **kwargs):
return Response({
'cloud_upload': bool(settings.CLOUD_BROWSER_APACHE_LIBCLOUD_PROVIDER),
})
class ProjectList(generics.ListCreateAPIView):
serializer_class = ProjectPolymorphicSerializer
pagination_class = None
permission_classes = (IsAuthenticated, IsAdminUserAndWriteOnly)
def get_queryset(self):
return self.request.user.projects
def perform_create(self, serializer):
serializer.save(users=[self.request.user])
class ProjectDetail(generics.RetrieveUpdateDestroyAPIView):
queryset = Project.objects.all()
serializer_class = ProjectSerializer
lookup_url_kwarg = 'project_id'
permission_classes = (IsAuthenticated, IsProjectUser, IsAdminUserAndWriteOnly)
class StatisticsAPI(APIView):
pagination_class = None
permission_classes = (IsAuthenticated, IsProjectUser, IsAdminUserAndWriteOnly)
def get(self, request, *args, **kwargs):
p = get_object_or_404(Project, pk=self.kwargs['project_id'])
label_count, user_count = self.label_per_data(p)
progress = self.progress(project=p)
response = dict()
response['label'] = label_count
response['user'] = user_count
response.update(progress)
return Response(response)
def progress(self, project):
docs = project.documents
annotation_class = project.get_annotation_class()
total = docs.count()
done = annotation_class.objects.filter(document_id__in=docs.all(),
user_id=self.request.user).\
aggregate(Count('document', distinct=True))['document__count']
remaining = total - done
return {'total': total, 'remaining': remaining}
def label_per_data(self, project):
label_count = Counter()
user_count = Counter()
annotation_class = project.get_annotation_class()
docs = project.documents.all()
annotations = annotation_class.objects.filter(document_id__in=docs.all())
for d in annotations.values('label__text', 'user__username').annotate(Count('label'), Count('user')):
label_count[d['label__text']] += d['label__count']
user_count[d['user__username']] += d['user__count']
return label_count, user_count
class ApproveLabelsAPI(APIView):
permission_classes = (IsAuthenticated, IsProjectUser, IsAdminUser)
def post(self, request, *args, **kwargs):
approved = self.request.data.get('approved', True)
document = get_object_or_404(Document, pk=self.kwargs['doc_id'])
document.annotations_approved_by = self.request.user if approved else None
document.save()
return Response(DocumentSerializer(document).data)
class LabelList(generics.ListCreateAPIView):
serializer_class = LabelSerializer
pagination_class = None
permission_classes = (IsAuthenticated, IsProjectUser, IsAdminUserAndWriteOnly)
def get_queryset(self):
project = get_object_or_404(Project, pk=self.kwargs['project_id'])
return project.labels
def perform_create(self, serializer):
project = get_object_or_404(Project, pk=self.kwargs['project_id'])
serializer.save(project=project)
class LabelDetail(generics.RetrieveUpdateDestroyAPIView):
queryset = Label.objects.all()
serializer_class = LabelSerializer
lookup_url_kwarg = 'label_id'
permission_classes = (IsAuthenticated, IsProjectUser, IsAdminUserAndWriteOnly)
class DocumentList(generics.ListCreateAPIView):
serializer_class = DocumentSerializer
filter_backends = (DjangoFilterBackend, filters.SearchFilter, filters.OrderingFilter)
search_fields = ('text', )
ordering_fields = ('created_at', 'updated_at', 'doc_annotations__updated_at',
'seq_annotations__updated_at', 'seq2seq_annotations__updated_at')
filter_class = DocumentFilter
permission_classes = (IsAuthenticated, IsProjectUser, IsAdminUserAndWriteOnly)
def get_queryset(self):
project = get_object_or_404(Project, pk=self.kwargs['project_id'])
queryset = project.documents
if project.randomize_document_order:
queryset = queryset.annotate(sort_id=F('id') % self.request.user.id).order_by('sort_id')
return queryset
def perform_create(self, serializer):
project = get_object_or_404(Project, pk=self.kwargs['project_id'])
serializer.save(project=project)
class DocumentDetail(generics.RetrieveUpdateDestroyAPIView):
queryset = Document.objects.all()
serializer_class = DocumentSerializer
lookup_url_kwarg = 'doc_id'
permission_classes = (IsAuthenticated, IsProjectUser, IsAdminUserAndWriteOnly)
class AnnotationList(generics.ListCreateAPIView):
pagination_class = None
permission_classes = (IsAuthenticated, IsProjectUser)
def get_serializer_class(self):
project = get_object_or_404(Project, pk=self.kwargs['project_id'])
self.serializer_class = project.get_annotation_serializer()
return self.serializer_class
def get_queryset(self):
project = get_object_or_404(Project, pk=self.kwargs['project_id'])
model = project.get_annotation_class()
self.queryset = model.objects.filter(document=self.kwargs['doc_id'],
user=self.request.user)
return self.queryset
def create(self, request, *args, **kwargs):
request.data['document'] = self.kwargs['doc_id']
return super().create(request, args, kwargs)
def perform_create(self, serializer):
doc = get_object_or_404(Document, pk=self.kwargs['doc_id'])
serializer.save(document=doc, user=self.request.user)
class AnnotationDetail(generics.RetrieveUpdateDestroyAPIView):
lookup_url_kwarg = 'annotation_id'
permission_classes = (IsAuthenticated, IsProjectUser, IsOwnAnnotation)
def get_serializer_class(self):
project = get_object_or_404(Project, pk=self.kwargs['project_id'])
self.serializer_class = project.get_annotation_serializer()
return self.serializer_class
def get_queryset(self):
project = get_object_or_404(Project, pk=self.kwargs['project_id'])
model = project.get_annotation_class()
self.queryset = model.objects.all()
return self.queryset
class TextUploadAPI(APIView):
parser_classes = (MultiPartParser,)
permission_classes = (IsAuthenticated, IsProjectUser, IsAdminUser)
def post(self, request, *args, **kwargs):
if 'file' not in request.data:
raise ParseError('Empty content')
self.save_file(
user=request.user,
file=request.data['file'],
file_format=request.data['format'],
project_id=kwargs['project_id'],
)
return Response(status=status.HTTP_201_CREATED)
@classmethod
def save_file(cls, user, file, file_format, project_id):
project = get_object_or_404(Project, pk=project_id)
parser = cls.select_parser(file_format)
data = parser.parse(file)
storage = project.get_storage(data)
storage.save(user)
@classmethod
def select_parser(cls, file_format):
if file_format == 'plain':
return PlainTextParser()
elif file_format == 'csv':
return CSVParser()
elif file_format == 'json':
return JSONParser()
elif file_format == 'conll':
return CoNLLParser()
else:
raise ValidationError('format {} is invalid.'.format(file_format))
class CloudUploadAPI(APIView):
permission_classes = TextUploadAPI.permission_classes
def get(self, request, *args, **kwargs):
try:
project_id = request.query_params['project_id']
file_format = request.query_params['upload_format']
cloud_container = request.query_params['container']
cloud_object = request.query_params['object']
except KeyError as ex:
raise ValidationError('query parameter {} is missing'.format(ex))
try:
cloud_file = self.get_cloud_object_as_io(cloud_container, cloud_object)
except ContainerDoesNotExistError:
raise ValidationError('cloud container {} does not exist'.format(cloud_container))
except ObjectDoesNotExistError:
raise ValidationError('cloud object {} does not exist'.format(cloud_object))
TextUploadAPI.save_file(
user=request.user,
file=cloud_file,
file_format=file_format,
project_id=project_id,
)
next_url = request.query_params.get('next')
if next_url == 'about:blank':
return Response(data='', content_type='text/plain', status=status.HTTP_201_CREATED)
if next_url:
return redirect(next_url)
return Response(status=status.HTTP_201_CREATED)
@classmethod
def get_cloud_object_as_io(cls, container_name, object_name):
provider = settings.CLOUD_BROWSER_APACHE_LIBCLOUD_PROVIDER.lower()
account = settings.CLOUD_BROWSER_APACHE_LIBCLOUD_ACCOUNT
key = settings.CLOUD_BROWSER_APACHE_LIBCLOUD_SECRET_KEY
driver = get_driver(DriverType.STORAGE, provider)
client = driver(account, key)
cloud_container = client.get_container(container_name)
cloud_object = cloud_container.get_object(object_name)
return iterable_to_io(cloud_object.as_stream())
class TextDownloadAPI(APIView):
permission_classes = (IsAuthenticated, IsProjectUser, IsAdminUser)
renderer_classes = (CSVRenderer, JSONLRenderer)
def get(self, request, *args, **kwargs):
format = request.query_params.get('q')
project = get_object_or_404(Project, pk=self.kwargs['project_id'])
documents = project.documents.all()
painter = self.select_painter(format)
# json1 format prints text labels while json format prints annotations with label ids
# json1 format - "labels": [[0, 15, "PERSON"], ..]
# json format - "annotations": [{"label": 5, "start_offset": 0, "end_offset": 2, "user": 1},..]
if format == "json1":
labels = project.labels.all()
data = JSONPainter.paint_labels(documents, labels)
else:
data = painter.paint(documents)
return Response(data)
def select_painter(self, format):
if format == 'csv':
return CSVPainter()
elif format == 'json' or format == "json1":
return JSONPainter()
else:
raise ValidationError('format {} is invalid.'.format(format))