"""API endpoints""" import re import uuid from urllib.parse import urlparse from django.conf import settings from django.contrib.postgres.aggregates import ArrayAgg from django.contrib.postgres.search import TrigramSimilarity from django.core.exceptions import ValidationError from django.core.files.storage import default_storage from django.db.models import ( Exists, Min, OuterRef, Q, Subquery, Value, ) from django.http import Http404 from botocore.exceptions import ClientError from rest_framework import ( decorators, exceptions, filters, metadata, mixins, pagination, status, views, viewsets, ) from rest_framework import ( response as drf_response, ) from rest_framework.permissions import AllowAny from core import enums, models from core.services.ai_services import AIService from . import permissions, serializers, utils ATTACHMENTS_FOLDER = "attachments" UUID_REGEX = ( r"[a-fA-F0-9]{8}-[a-fA-F0-9]{4}-[a-fA-F0-9]{4}-[a-fA-F0-9]{4}-[a-fA-F0-9]{12}" ) FILE_EXT_REGEX = r"\.[a-zA-Z]{3,4}" MEDIA_URL_PATTERN = re.compile( f"{settings.MEDIA_URL:s}({UUID_REGEX:s})/" f"({ATTACHMENTS_FOLDER:s}/{UUID_REGEX:s}{FILE_EXT_REGEX:s})$" ) # pylint: disable=too-many-ancestors ATTACHMENTS_FOLDER = "attachments" class NestedGenericViewSet(viewsets.GenericViewSet): """ A generic Viewset aims to be used in a nested route context. e.g: `/api/v1.0/resource_1//resource_2//` It allows to define all url kwargs and lookup fields to perform the lookup. """ lookup_fields: list[str] = ["pk"] lookup_url_kwargs: list[str] = [] def __getattribute__(self, item): """ This method is overridden to allow to get the last lookup field or lookup url kwarg when accessing the `lookup_field` or `lookup_url_kwarg` attribute. This is useful to keep compatibility with all methods used by the parent class `GenericViewSet`. """ if item in ["lookup_field", "lookup_url_kwarg"]: return getattr(self, item + "s", [None])[-1] return super().__getattribute__(item) def get_queryset(self): """ Get the list of items for this view. `lookup_fields` attribute is enumerated here to perform the nested lookup. """ queryset = super().get_queryset() # The last lookup field is removed to perform the nested lookup as it corresponds # to the object pk, it is used within get_object method. lookup_url_kwargs = ( self.lookup_url_kwargs[:-1] if self.lookup_url_kwargs else self.lookup_fields[:-1] ) filter_kwargs = {} for index, lookup_url_kwarg in enumerate(lookup_url_kwargs): if lookup_url_kwarg not in self.kwargs: raise KeyError( f"Expected view {self.__class__.__name__} to be called with a URL " f'keyword argument named "{lookup_url_kwarg}". Fix your URL conf, or ' "set the `.lookup_fields` attribute on the view correctly." ) filter_kwargs.update( {self.lookup_fields[index]: self.kwargs[lookup_url_kwarg]} ) return queryset.filter(**filter_kwargs) class SerializerPerActionMixin: """ A mixin to allow to define serializer classes for each action. This mixin is useful to avoid to define a serializer class for each action in the `get_serializer_class` method. """ serializer_classes: dict[str, type] = {} default_serializer_class: type = None def get_serializer_class(self): """ Return the serializer class to use depending on the action. """ return self.serializer_classes.get(self.action, self.default_serializer_class) class Pagination(pagination.PageNumberPagination): """Pagination to display no more than 100 objects per page sorted by creation date.""" ordering = "-created_on" max_page_size = 100 page_size_query_param = "page_size" class UserViewSet( mixins.UpdateModelMixin, viewsets.GenericViewSet, mixins.ListModelMixin ): """User ViewSet""" permission_classes = [permissions.IsSelf] queryset = models.User.objects.all() serializer_class = serializers.UserSerializer def get_queryset(self): """ Limit listed users by querying the email field with a trigram similarity search if a query is provided. Limit listed users by excluding users already in the document if a document_id is provided. """ queryset = self.queryset if self.action == "list": # Exclude all users already in the given document if document_id := self.request.GET.get("document_id", ""): queryset = queryset.exclude(documentaccess__document_id=document_id) # Filter users by email similarity if query := self.request.GET.get("q", ""): # For performance reasons we filter first by similarity, which relies on an index, # then only calculate precise similarity scores for sorting purposes queryset = queryset.filter(email__trigram_word_similar=query) queryset = queryset.annotate( similarity=TrigramSimilarity("email", query) ) # When the query only is on the name part, we should try to make many proposals # But when the query looks like an email we should only propose serious matches threshold = 0.6 if "@" in query else 0.1 queryset = queryset.filter(similarity__gt=threshold).order_by( "-similarity" ) return queryset @decorators.action( detail=False, methods=["get"], url_name="me", url_path="me", permission_classes=[permissions.IsAuthenticated], ) def get_me(self, request): """ Return information on currently logged user """ context = {"request": request} return drf_response.Response( self.serializer_class(request.user, context=context).data ) class ResourceAccessViewsetMixin: """Mixin with methods common to all access viewsets.""" def get_permissions(self): """User only needs to be authenticated to list resource accesses""" if self.action == "list": permission_classes = [permissions.IsAuthenticated] else: return super().get_permissions() return [permission() for permission in permission_classes] def get_serializer_context(self): """Extra context provided to the serializer class.""" context = super().get_serializer_context() context["resource_id"] = self.kwargs["resource_id"] return context def get_queryset(self): """Return the queryset according to the action.""" queryset = super().get_queryset() queryset = queryset.filter( **{self.resource_field_name: self.kwargs["resource_id"]} ) if self.action == "list": user = self.request.user teams = user.teams user_roles_query = ( queryset.filter( Q(user=user) | Q(team__in=teams), **{self.resource_field_name: self.kwargs["resource_id"]}, ) .values(self.resource_field_name) .annotate(roles_array=ArrayAgg("role")) .values("roles_array") ) # Limit to resource access instances related to a resource THAT also has # a resource access # instance for the logged-in user (we don't want to list only the resource # access instances pointing to the logged-in user) queryset = ( queryset.filter( Q(**{f"{self.resource_field_name}__accesses__user": user}) | Q(**{f"{self.resource_field_name}__accesses__team__in": teams}), **{self.resource_field_name: self.kwargs["resource_id"]}, ) .annotate(user_roles=Subquery(user_roles_query)) .distinct() ) return queryset def destroy(self, request, *args, **kwargs): """Forbid deleting the last owner access""" instance = self.get_object() resource = getattr(instance, self.resource_field_name) # Check if the access being deleted is the last owner access for the resource if ( instance.role == "owner" and resource.accesses.filter(role="owner").count() == 1 ): return drf_response.Response( {"detail": "Cannot delete the last owner access for the resource."}, status=status.HTTP_403_FORBIDDEN, ) return super().destroy(request, *args, **kwargs) def perform_update(self, serializer): """Check that we don't change the role if it leads to losing the last owner.""" instance = serializer.instance # Check if the role is being updated and the new role is not "owner" if ( "role" in self.request.data and self.request.data["role"] != models.RoleChoices.OWNER ): resource = getattr(instance, self.resource_field_name) # Check if the access being updated is the last owner access for the resource if ( instance.role == models.RoleChoices.OWNER and resource.accesses.filter(role=models.RoleChoices.OWNER).count() == 1 ): message = "Cannot change the role to a non-owner role for the last owner access." raise exceptions.PermissionDenied({"detail": message}) serializer.save() class DocumentMetadata(metadata.SimpleMetadata): """Custom metadata class to add information""" def determine_metadata(self, request, view): """Add language choices only for the list endpoint.""" simple_metadata = super().determine_metadata(request, view) if request.path.endswith("/documents/"): simple_metadata["actions"]["POST"]["language"] = { "choices": [ {"value": code, "display_name": name} for code, name in enums.ALL_LANGUAGES.items() ] } return simple_metadata class DocumentViewSet( mixins.CreateModelMixin, mixins.DestroyModelMixin, mixins.UpdateModelMixin, viewsets.GenericViewSet, ): """Document ViewSet""" filter_backends = [filters.OrderingFilter] metadata_class = DocumentMetadata ordering = ["-updated_at"] ordering_fields = ["created_at", "is_favorite", "updated_at", "title"] permission_classes = [ permissions.AccessPermission, ] queryset = models.Document.objects.all() serializer_class = serializers.DocumentSerializer def get_serializer_class(self): """ Use ListDocumentSerializer for list actions, otherwise use DocumentSerializer. """ if self.action == "list": return serializers.ListDocumentSerializer return self.serializer_class def get_queryset(self): """Optimize queryset to include favorite status for the current user.""" queryset = super().get_queryset() user = self.request.user if not user.is_authenticated: # If the user is not authenticated, annotate `is_favorite` as False return queryset.annotate(is_favorite=Value(False)) # Annotate the queryset to indicate if the document is favorited by the current user favorite_exists = models.DocumentFavorite.objects.filter( document_id=OuterRef("pk"), user=user ) queryset = queryset.annotate(is_favorite=Exists(favorite_exists)) # Annotate the queryset with the logged-in user roles user_roles_query = ( models.DocumentAccess.objects.filter( Q(user=user) | Q(team__in=user.teams), document_id=OuterRef("pk"), ) .values("document") .annotate(roles_array=ArrayAgg("role")) .values("roles_array") ) return queryset.annotate(user_roles=Subquery(user_roles_query)).distinct() def list(self, request, *args, **kwargs): """Restrict resources returned by the list endpoint""" queryset = self.filter_queryset(self.get_queryset()) user = self.request.user if user.is_authenticated: queryset = queryset.filter( Q(accesses__user=user) | Q(accesses__team__in=user.teams) | ( Q(link_traces__user=user) & ~Q(link_reach=models.LinkReachChoices.RESTRICTED) ) ) else: queryset = queryset.none() page = self.paginate_queryset(queryset) if page is not None: serializer = self.get_serializer(page, many=True) return self.get_paginated_response(serializer.data) serializer = self.get_serializer(queryset, many=True) return drf_response.Response(serializer.data) def retrieve(self, request, *args, **kwargs): """ Add a trace that the document was accessed by a user. This is used to list documents on a user's list view even though the user has no specific role in the document (link access when the link reach configuration of the document allows it). """ instance = self.get_object() serializer = self.get_serializer(instance) if self.request.user.is_authenticated: try: # Add a trace that the user visited the document (this is needed to include # the document in the user's list view) models.LinkTrace.objects.create( document=instance, user=self.request.user, ) except ValidationError: # The trace already exists, so we just pass without doing anything pass return drf_response.Response(serializer.data) def perform_create(self, serializer): """Set the current user as owner of the newly created object.""" obj = serializer.save() models.DocumentAccess.objects.create( document=obj, user=self.request.user, role=models.RoleChoices.OWNER, ) @decorators.action(detail=True, methods=["get"], url_path="versions") def versions_list(self, request, *args, **kwargs): """ Return the document's versions but only those created after the user got access to the document """ user = request.user if not user.is_authenticated: raise exceptions.PermissionDenied("Authentication required.") # Validate query parameters using dedicated serializer serializer = serializers.VersionFilterSerializer(data=request.query_params) serializer.is_valid(raise_exception=True) document = self.get_object() # Users should not see version history dating from before they gained access to the # document. Filter to get the minimum access date for the logged-in user access_queryset = document.accesses.filter( Q(user=user) | Q(team__in=user.teams) ).aggregate(min_date=Min("created_at")) # Handle the case where the user has no accesses min_datetime = access_queryset["min_date"] if not min_datetime: return exceptions.PermissionDenied( "Only users with specific access can see version history" ) versions_data = document.get_versions_slice( from_version_id=serializer.validated_data.get("version_id"), min_datetime=min_datetime, page_size=serializer.validated_data.get("page_size"), ) return drf_response.Response(versions_data) @decorators.action( detail=True, methods=["get", "delete"], url_path="versions/(?P[0-9a-f-]{36})", ) # pylint: disable=unused-argument def versions_detail(self, request, pk, version_id, *args, **kwargs): """Custom action to retrieve a specific version of a document""" document = self.get_object() try: response = document.get_content_response(version_id=version_id) except (FileNotFoundError, ClientError) as err: raise Http404 from err # Don't let users access versions that were created before they were given access # to the document user = request.user min_datetime = min( access.created_at for access in document.accesses.filter( Q(user=user) | Q(team__in=user.teams), ) ) if response["LastModified"] < min_datetime: raise Http404 if request.method == "DELETE": response = document.delete_version(version_id) return drf_response.Response( status=response["ResponseMetadata"]["HTTPStatusCode"] ) return drf_response.Response( { "content": response["Body"].read().decode("utf-8"), "last_modified": response["LastModified"], "id": version_id, } ) @decorators.action(detail=True, methods=["put"], url_path="link-configuration") def link_configuration(self, request, *args, **kwargs): """Update link configuration with specific rights (cf get_abilities).""" # Check permissions first document = self.get_object() # Deserialize and validate the data serializer = serializers.LinkDocumentSerializer( document, data=request.data, partial=True ) serializer.is_valid(raise_exception=True) serializer.save() return drf_response.Response(serializer.data, status=status.HTTP_200_OK) @decorators.action(detail=True, methods=["post", "delete"], url_path="favorite") def favorite(self, request, *args, **kwargs): """ Mark or unmark the document as a favorite for the logged-in user based on the HTTP method. """ # Check permissions first document = self.get_object() user = request.user if request.method == "POST": # Try to mark as favorite try: models.DocumentFavorite.objects.create(document=document, user=user) except ValidationError: return drf_response.Response( {"detail": "Document already marked as favorite"}, status=status.HTTP_200_OK, ) return drf_response.Response( {"detail": "Document marked as favorite"}, status=status.HTTP_201_CREATED, ) # Handle DELETE method to unmark as favorite deleted, _ = models.DocumentFavorite.objects.filter( document=document, user=user ).delete() if deleted: return drf_response.Response( {"detail": "Document unmarked as favorite"}, status=status.HTTP_204_NO_CONTENT, ) return drf_response.Response( {"detail": "Document was already not marked as favorite"}, status=status.HTTP_200_OK, ) @decorators.action(detail=True, methods=["post"], url_path="attachment-upload") def attachment_upload(self, request, *args, **kwargs): """Upload a file related to a given document""" # Check permissions first document = self.get_object() # Validate metadata in payload serializer = serializers.FileUploadSerializer(data=request.data) serializer.is_valid(raise_exception=True) # Generate a generic yet unique filename to store the image in object storage file_id = uuid.uuid4() extension = serializer.validated_data["expected_extension"] key = f"{document.key_base}/{ATTACHMENTS_FOLDER:s}/{file_id!s}.{extension:s}" # Prepare metadata for storage extra_args = {"Metadata": {"owner": str(request.user.id)}} if serializer.validated_data["is_unsafe"]: extra_args["Metadata"]["is_unsafe"] = "true" file = serializer.validated_data["file"] default_storage.connection.meta.client.upload_fileobj( file, default_storage.bucket_name, key, ExtraArgs=extra_args ) return drf_response.Response( {"file": f"{settings.MEDIA_URL:s}{key:s}"}, status=status.HTTP_201_CREATED ) @decorators.action(detail=False, methods=["get"], url_path="retrieve-auth") def retrieve_auth(self, request, *args, **kwargs): """ This view is used by an Nginx subrequest to control access to a document's attachment file. The original url is passed by nginx in the "HTTP_X_ORIGINAL_URL" header. See corresponding ingress configuration in Helm chart and read about the nginx.ingress.kubernetes.io/auth-url annotation to understand how the Nginx ingress is configured to do this. Based on the original url and the logged in user, we must decide if we authorize Nginx to let this request go through (by returning a 200 code) or if we block it (by returning a 403 error). Note that we return 403 errors without any further details for security reasons. When we let the request go through, we compute authorization headers that will be added to the request going through thanks to the nginx.ingress.kubernetes.io/auth-response-headers annotation. The request will then be proxied to the object storage backend who will respond with the file after checking the signature included in headers. """ original_url = urlparse(request.META.get("HTTP_X_ORIGINAL_URL")) match = MEDIA_URL_PATTERN.search(original_url.path) try: pk, attachment_key = match.groups() except AttributeError as excpt: raise exceptions.PermissionDenied() from excpt # Check permission try: document = models.Document.objects.get(pk=pk) except models.Document.DoesNotExist as excpt: raise exceptions.PermissionDenied() from excpt if not document.get_abilities(request.user).get("retrieve", False): raise exceptions.PermissionDenied() # Generate authorization headers and return an authorization to proceed with the request request = utils.generate_s3_authorization_headers(f"{pk:s}/{attachment_key:s}") return drf_response.Response("authorized", headers=request.headers, status=200) @decorators.action( detail=True, methods=["post"], name="Apply a transformation action on a piece of text with AI", url_path="ai-transform", throttle_classes=[utils.AIDocumentRateThrottle, utils.AIUserRateThrottle], ) def ai_transform(self, request, *args, **kwargs): """ POST /api/v1.0/documents//ai-transform with expected data: - text: str - action: str [prompt, correct, rephrase, summarize] Return JSON response with the processed text. """ # Check permissions first self.get_object() serializer = serializers.AITransformSerializer(data=request.data) serializer.is_valid(raise_exception=True) text = serializer.validated_data["text"] action = serializer.validated_data["action"] response = AIService().transform(text, action) return drf_response.Response(response, status=status.HTTP_200_OK) @decorators.action( detail=True, methods=["post"], name="Translate a piece of text with AI", serializer_class=serializers.AITranslateSerializer, url_path="ai-translate", throttle_classes=[utils.AIDocumentRateThrottle, utils.AIUserRateThrottle], ) def ai_translate(self, request, *args, **kwargs): """ POST /api/v1.0/documents//ai-translate with expected data: - text: str - language: str [settings.LANGUAGES] Return JSON response with the translated text. """ # Check permissions first self.get_object() serializer = self.get_serializer(data=request.data) serializer.is_valid(raise_exception=True) text = serializer.validated_data["text"] language = serializer.validated_data["language"] response = AIService().translate(text, language) return drf_response.Response(response, status=status.HTTP_200_OK) class DocumentAccessViewSet( ResourceAccessViewsetMixin, mixins.CreateModelMixin, mixins.DestroyModelMixin, mixins.ListModelMixin, mixins.RetrieveModelMixin, mixins.UpdateModelMixin, viewsets.GenericViewSet, ): """ API ViewSet for all interactions with document accesses. GET /api/v1.0/documents//accesses/: Return list of all document accesses related to the logged-in user or one document access if an id is provided. POST /api/v1.0/documents//accesses/ with expected data: - user: str - role: str [administrator|editor|reader] Return newly created document access PUT /api/v1.0/documents//accesses// with expected data: - role: str [owner|admin|editor|reader] Return updated document access PATCH /api/v1.0/documents//accesses// with expected data: - role: str [owner|admin|editor|reader] Return partially updated document access DELETE /api/v1.0/documents//accesses// Delete targeted document access """ lookup_field = "pk" pagination_class = Pagination permission_classes = [permissions.IsAuthenticated, permissions.AccessPermission] queryset = models.DocumentAccess.objects.select_related("user").all() resource_field_name = "document" serializer_class = serializers.DocumentAccessSerializer def perform_create(self, serializer): """Add a new access to the document and send an email to the new added user.""" access = serializer.save() language = self.request.headers.get("Content-Language", "en-us") access.document.email_invitation( language, access.user.email, access.role, self.request.user, ) class TemplateViewSet( mixins.CreateModelMixin, mixins.DestroyModelMixin, mixins.RetrieveModelMixin, mixins.UpdateModelMixin, viewsets.GenericViewSet, ): """Template ViewSet""" filter_backends = [filters.OrderingFilter] permission_classes = [ permissions.IsAuthenticatedOrSafe, permissions.AccessPermission, ] ordering = ["-created_at"] ordering_fields = ["created_at", "updated_at", "title"] serializer_class = serializers.TemplateSerializer queryset = models.Template.objects.all() def get_queryset(self): """Custom queryset to get user related templates.""" queryset = super().get_queryset() user = self.request.user if not user.is_authenticated: return queryset user_roles_query = ( models.TemplateAccess.objects.filter( Q(user=user) | Q(team__in=user.teams), template_id=OuterRef("pk"), ) .values("template") .annotate(roles_array=ArrayAgg("role")) .values("roles_array") ) return queryset.annotate(user_roles=Subquery(user_roles_query)).distinct() def list(self, request, *args, **kwargs): """Restrict templates returned by the list endpoint""" queryset = self.filter_queryset(self.get_queryset()) user = self.request.user if user.is_authenticated: queryset = queryset.filter( Q(accesses__user=user) | Q(accesses__team__in=user.teams) | Q(is_public=True) ) else: queryset = queryset.filter(is_public=True) page = self.paginate_queryset(queryset) if page is not None: serializer = self.get_serializer(page, many=True) return self.get_paginated_response(serializer.data) serializer = self.get_serializer(queryset, many=True) return drf_response.Response(serializer.data) def perform_create(self, serializer): """Set the current user as owner of the newly created object.""" obj = serializer.save() models.TemplateAccess.objects.create( template=obj, user=self.request.user, role=models.RoleChoices.OWNER, ) @decorators.action( detail=True, methods=["post"], url_path="generate-document", permission_classes=[permissions.AccessPermission], ) # pylint: disable=unused-argument def generate_document(self, request, pk=None): """ Generate and return a document for this template around the body passed as argument. 2 types of body are accepted: - HTML: body_type = "html" - Markdown: body_type = "markdown" 2 types of documents can be generated: - PDF: format = "pdf" - Docx: format = "docx" """ serializer = serializers.DocumentGenerationSerializer(data=request.data) if not serializer.is_valid(): return drf_response.Response( serializer.errors, status=status.HTTP_400_BAD_REQUEST ) body = serializer.validated_data["body"] body_type = serializer.validated_data["body_type"] export_format = serializer.validated_data["format"] template = self.get_object() return template.generate_document(body, body_type, export_format) class TemplateAccessViewSet( ResourceAccessViewsetMixin, mixins.CreateModelMixin, mixins.DestroyModelMixin, mixins.ListModelMixin, mixins.RetrieveModelMixin, mixins.UpdateModelMixin, viewsets.GenericViewSet, ): """ API ViewSet for all interactions with template accesses. GET /api/v1.0/templates//accesses/: Return list of all template accesses related to the logged-in user or one template access if an id is provided. POST /api/v1.0/templates//accesses/ with expected data: - user: str - role: str [administrator|editor|reader] Return newly created template access PUT /api/v1.0/templates//accesses// with expected data: - role: str [owner|admin|editor|reader] Return updated template access PATCH /api/v1.0/templates//accesses// with expected data: - role: str [owner|admin|editor|reader] Return partially updated template access DELETE /api/v1.0/templates//accesses// Delete targeted template access """ lookup_field = "pk" pagination_class = Pagination permission_classes = [permissions.IsAuthenticated, permissions.AccessPermission] queryset = models.TemplateAccess.objects.select_related("user").all() resource_field_name = "template" serializer_class = serializers.TemplateAccessSerializer class InvitationViewset( mixins.CreateModelMixin, mixins.ListModelMixin, mixins.RetrieveModelMixin, mixins.DestroyModelMixin, mixins.UpdateModelMixin, viewsets.GenericViewSet, ): """API ViewSet for user invitations to document. GET /api/v1.0/documents//invitations/:/ Return list of invitations related to that document or one document access if an id is provided. POST /api/v1.0/documents//invitations/ with expected data: - email: str - role: str [administrator|editor|reader] Return newly created invitation (issuer and document are automatically set) PATCH /api/v1.0/documents//invitations/:/ with expected data: - role: str [owner|admin|editor|reader] Return partially updated document invitation DELETE /api/v1.0/documents//invitations// Delete targeted invitation """ lookup_field = "id" pagination_class = Pagination permission_classes = [ permissions.CanCreateInvitationPermission, permissions.AccessPermission, ] queryset = ( models.Invitation.objects.all() .select_related("document") .order_by("-created_at") ) serializer_class = serializers.InvitationSerializer def get_serializer_context(self): """Extra context provided to the serializer class.""" context = super().get_serializer_context() context["resource_id"] = self.kwargs["resource_id"] return context def get_queryset(self): """Return the queryset according to the action.""" queryset = super().get_queryset() queryset = queryset.filter(document=self.kwargs["resource_id"]) if self.action == "list": user = self.request.user teams = user.teams # Determine which role the logged-in user has in the document user_roles_query = ( models.DocumentAccess.objects.filter( Q(user=user) | Q(team__in=teams), document=self.kwargs["resource_id"], ) .values("document") .annotate(roles_array=ArrayAgg("role")) .values("roles_array") ) queryset = ( # The logged-in user should be administrator or owner to see its accesses queryset.filter( Q( document__accesses__user=user, document__accesses__role__in=models.PRIVILEGED_ROLES, ) | Q( document__accesses__team__in=teams, document__accesses__role__in=models.PRIVILEGED_ROLES, ), ) # Abilities are computed based on logged-in user's role and # the user role on each document access .annotate(user_roles=Subquery(user_roles_query)) .distinct() ) return queryset def perform_create(self, serializer): """Save invitation to a document then send an email to the invited user.""" invitation = serializer.save() language = self.request.headers.get("Content-Language", "en-us") invitation.document.email_invitation( language, invitation.email, invitation.role, self.request.user ) class ConfigView(views.APIView): """API ViewSet for sharing some public settings.""" permission_classes = [AllowAny] def get(self, request): """ GET /api/v1.0/config/ Return a dictionary of public settings. """ array_settings = [ "COLLABORATION_SERVER_URL", "CRISP_WEBSITE_ID", "ENVIRONMENT", "FRONTEND_THEME", "MEDIA_BASE_URL", "LANGUAGES", "LANGUAGE_CODE", "SENTRY_DSN", ] dict_settings = {} for setting in array_settings: if hasattr(settings, setting): dict_settings[setting] = getattr(settings, setting) return drf_response.Response(dict_settings)