599 lines
20 KiB
Python
599 lines
20 KiB
Python
import datetime
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import os
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from collections import defaultdict
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from typing import Any, Dict
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from django.conf import settings
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from django.contrib.staticfiles import finders
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from django.contrib.staticfiles.views import serve
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from django.db.models import F
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from django.http import Http404, HttpResponse
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from django.utils.timezone import now
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from django.views import static
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from django.views.generic.base import View
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from openslides.utils.utils import split_element_id
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from .. import __license__ as license, __url__ as url, __version__ as version
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from ..users.models import User
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from ..utils import views as utils_views
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from ..utils.arguments import arguments
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from ..utils.auth import GROUP_ADMIN_PK, anonymous_is_enabled, has_perm, in_some_groups
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from ..utils.autoupdate import inform_changed_data
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from ..utils.plugins import (
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get_plugin_description,
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get_plugin_license,
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get_plugin_url,
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get_plugin_verbose_name,
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get_plugin_version,
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)
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from ..utils.rest_api import (
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GenericViewSet,
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ListModelMixin,
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ModelViewSet,
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Response,
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RetrieveModelMixin,
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ValidationError,
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detail_route,
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)
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from .access_permissions import (
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ConfigAccessPermissions,
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CountdownAccessPermissions,
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ProjectionDefaultAccessPermissions,
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ProjectorAccessPermissions,
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ProjectorMessageAccessPermissions,
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TagAccessPermissions,
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)
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from .config import config
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from .exceptions import ConfigError, ConfigNotFound
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from .models import (
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ConfigStore,
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Countdown,
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History,
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HistoryData,
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ProjectionDefault,
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Projector,
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ProjectorMessage,
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Tag,
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)
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from .serializers import elements_array_validator, elements_validator
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# Special Django views
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class IndexView(View):
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"""
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The primary view for the OpenSlides client. Serves static files. If a file
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does not exist or a directory is requested, the index.html is delivered instead.
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"""
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cache: Dict[str, str] = {}
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"""
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Saves the path to the index.html.
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May be extended later to cache every template.
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"""
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def __init__(self, *args: Any, **kwargs: Any) -> None:
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super().__init__(*args, **kwargs)
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no_caching = arguments.get("no_template_caching", False)
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if "index" not in self.cache or no_caching:
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self.cache["index"] = finders.find("index.html")
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self.index_document_root, self.index_path = os.path.split(self.cache["index"])
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def get(self, request, path, **kwargs) -> HttpResponse:
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"""
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Tries to serve the requested file. If it is not found or a directory is
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requested, the index.html is delivered.
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"""
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try:
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response = serve(request, path, insecure=True, **kwargs)
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except Http404:
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response = static.serve(
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request,
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self.index_path,
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document_root=self.index_document_root,
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**kwargs,
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)
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return response
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# Viewsets for the REST API
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class ProjectorViewSet(ModelViewSet):
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"""
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API endpoint for the projector slide info.
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There are the following views: See strings in check_view_permissions().
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"""
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access_permissions = ProjectorAccessPermissions()
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queryset = Projector.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 = has_perm(self.request.user, "core.can_see_projector")
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elif self.action in (
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"create",
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"update",
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"partial_update",
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"destroy",
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"control_view",
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"set_scroll",
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"set_projectiondefault",
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"project",
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):
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result = has_perm(self.request.user, "core.can_see_projector") and has_perm(
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self.request.user, "core.can_manage_projector"
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)
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else:
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result = False
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return result
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def perform_create(self, serializer):
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projector = serializer.save()
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projector.elements = [{"name": "core/clock", "stable": True}]
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projector.save()
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def destroy(self, *args, **kwargs):
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"""
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REST API operation for DELETE requests.
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Assigns all ProjectionDefault objects from this projector to the
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first projector found.
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"""
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if len(Projector.objects.all()) <= 1:
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raise ValidationError({"detail": "You can't delete the last projector."})
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projector_instance = self.get_object()
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new_projector_id = (
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Projector.objects.exclude(pk=projector_instance.pk).first().pk
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)
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for projection_default in ProjectionDefault.objects.all():
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if projection_default.projector.id == projector_instance.id:
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projection_default.projector_id = new_projector_id
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projection_default.save()
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return super(ProjectorViewSet, self).destroy(*args, **kwargs)
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@detail_route(methods=["post"])
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def project(self, request, pk):
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"""
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Sets the `elements` and `elements_preview` and adds one item to the
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`elements_history`.
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`request.data` can have three arguments: `append_to_history`, `elements`
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and `preview`. Non of them is required.
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`append_to_history` adds one element to the end of the history_elements.
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`elements` and `preview` preplaces the coresponding fields in the
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database.
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If `delete_last_history_element` is True, the last element is deleted.
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Note: You cannot give `append_to_history` and `delete_last_history_element`
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at the same time.
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"""
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projector = self.get_object()
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elements = request.data.get("elements")
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preview = request.data.get("preview")
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history_element = request.data.get("append_to_history")
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delete_last_history_element = request.data.get(
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"delete_last_history_element", False
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)
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if elements is not None:
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elements_validator(elements)
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projector.elements = elements
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if preview is not None:
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elements_validator(preview)
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projector.elements_preview = preview
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elements_history = None
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if history_element is not None and delete_last_history_element is False:
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elements_history = projector.elements_history + [history_element]
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if history_element is None and delete_last_history_element is True:
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elements_history = projector.elements_history[:-1]
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if elements_history is not None:
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elements_array_validator(elements_history)
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projector.elements_history = elements_history
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projector.save()
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return Response()
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@detail_route(methods=["post"])
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def control_view(self, request, pk):
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"""
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REST API operation to control the projector view, i. e. scale and
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scroll the projector.
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It expects a POST request to
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/rest/core/projector/<pk>/control_view/ with a dictionary with an
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action ('scale' or 'scroll') and a direction ('up', 'down' or
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'reset'). An optional 'step' can be given to control the amount
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of scrolling and scaling. The default is 1.
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Example:
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{
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"action": "scale",
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"direction": "up"
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}
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"""
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if not isinstance(request.data, dict):
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raise ValidationError({"detail": "Data must be a dictionary."})
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if request.data.get("action") not in ("scale", "scroll") or request.data.get(
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"direction"
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) not in ("up", "down", "reset"):
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raise ValidationError(
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{
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"detail": "Data must be a dictionary with an action ('scale' or 'scroll') "
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"and a direction ('up', 'down' or 'reset')."
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}
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)
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projector_instance = self.get_object()
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step = request.data.get("step", 1)
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if step < 1:
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step = 1
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if request.data["action"] == "scale":
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if request.data["direction"] == "up":
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projector_instance.scale = F("scale") + step
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elif request.data["direction"] == "down":
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projector_instance.scale = F("scale") - step
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else:
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# request.data['direction'] == 'reset'
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projector_instance.scale = 0
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else:
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# request.data['action'] == 'scroll'
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if request.data["direction"] == "up":
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projector_instance.scroll = F("scroll") + step
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elif request.data["direction"] == "down":
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projector_instance.scroll = F("scroll") - step
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else:
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# request.data['direction'] == 'reset'
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projector_instance.scroll = 0
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projector_instance.save(skip_autoupdate=True)
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projector_instance.refresh_from_db()
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inform_changed_data(projector_instance)
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return Response()
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@detail_route(methods=["post"])
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def set_scroll(self, request, pk):
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"""
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REST API operation to scroll the projector.
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It expects a POST request to
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/rest/core/projector/<pk>/set_scroll/ with a new value for scroll.
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"""
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if not isinstance(request.data, int):
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raise ValidationError({"detail": "Data must be an int."})
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projector_instance = self.get_object()
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projector_instance.scroll = request.data
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projector_instance.save()
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message = f"Setting scroll to {request.data} was successful."
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return Response({"detail": message})
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class ProjectionDefaultViewSet(ListModelMixin, RetrieveModelMixin, GenericViewSet):
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"""
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API endpoint for projection defaults.
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There are the following views: list, and retrieve. Assigning projection defaults
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to projectors can be done by updating the projector.
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"""
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access_permissions = ProjectionDefaultAccessPermissions()
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queryset = ProjectionDefault.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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else:
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result = False
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return result
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class TagViewSet(ModelViewSet):
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"""
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API endpoint for tags.
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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 = TagAccessPermissions()
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queryset = Tag.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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# Every authenticated user can see the metadata.
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# Anonymous users can do so if they are enabled.
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result = self.request.user.is_authenticated or anonymous_is_enabled()
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elif self.action in ("create", "partial_update", "update", "destroy"):
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result = has_perm(self.request.user, "core.can_manage_tags")
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else:
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result = False
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return result
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class ConfigViewSet(ModelViewSet):
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"""
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API endpoint for the config.
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There are the following views: metadata, list, retrieve, update and
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partial_update.
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"""
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access_permissions = ConfigAccessPermissions()
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queryset = ConfigStore.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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# Every authenticated user can see the metadata and list or
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# retrieve the config. Anonymous users can do so if they are
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# enabled.
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result = self.request.user.is_authenticated or anonymous_is_enabled()
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elif self.action in ("partial_update", "update"):
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# The user needs 'core.can_manage_logos_and_fonts' for all config values
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# starting with 'logo' and 'font'. For all other config values th euser needs
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# the default permissions 'core.can_manage_config'.
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pk = self.kwargs["pk"]
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if pk.startswith("logo") or pk.startswith("font"):
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result = has_perm(self.request.user, "core.can_manage_logos_and_fonts")
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else:
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result = has_perm(self.request.user, "core.can_manage_config")
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else:
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result = False
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return result
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def update(self, request, *args, **kwargs):
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"""
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Updates a config variable. Only managers can do this.
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Example: {"value": 42}
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"""
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key = kwargs["pk"]
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value = request.data.get("value")
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if value is None:
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raise ValidationError({"detail": "Invalid input. Config value is missing."})
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# Validate and change value.
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try:
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config[key] = value
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except ConfigNotFound:
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raise Http404
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except ConfigError as err:
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raise ValidationError({"detail": str(err)})
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# Return response.
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return Response({"key": key, "value": value})
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class ProjectorMessageViewSet(ModelViewSet):
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"""
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API endpoint for messages.
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There are the following views: list, retrieve, create, update,
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partial_update and destroy.
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"""
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access_permissions = ProjectorMessageAccessPermissions()
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queryset = ProjectorMessage.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 ("create", "partial_update", "update", "destroy"):
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result = has_perm(self.request.user, "core.can_manage_projector")
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else:
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result = False
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return result
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class CountdownViewSet(ModelViewSet):
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"""
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API endpoint for Countdown.
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There are the following views: list, retrieve, create, update,
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partial_update and destroy.
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"""
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access_permissions = CountdownAccessPermissions()
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queryset = Countdown.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 ("create", "partial_update", "update", "destroy"):
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result = has_perm(self.request.user, "core.can_manage_projector")
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else:
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result = False
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return result
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# Special API views
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class ServerTime(utils_views.APIView):
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"""
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Returns the server time as UNIX timestamp.
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"""
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http_method_names = ["get"]
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def get_context_data(self, **context):
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return now().timestamp()
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class VersionView(utils_views.APIView):
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"""
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Returns a dictionary with the OpenSlides version and the version of all
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plugins.
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"""
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http_method_names = ["get"]
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def get_context_data(self, **context):
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result: Dict[str, Any] = {
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"openslides_version": version,
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"openslides_license": license,
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"openslides_url": url,
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"plugins": [],
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"no_name_yet_users": User.objects.filter(last_login__isnull=False).count(),
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}
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# Versions of plugins.
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for plugin in settings.INSTALLED_PLUGINS:
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result["plugins"].append(
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{
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"verbose_name": get_plugin_verbose_name(plugin),
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"description": get_plugin_description(plugin),
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"version": get_plugin_version(plugin),
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"license": get_plugin_license(plugin),
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"url": get_plugin_url(plugin),
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}
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)
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return result
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class HistoryInformationView(utils_views.APIView):
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"""
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View to retrieve information about OpenSlides history.
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Use GET to search history information. The query parameter 'type' determines
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the type of your search:
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Examples:
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/?type=element&value=motions%2Fmotion%3A42 if your search for motion 42
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Use DELETE to clear the history.
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"""
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http_method_names = ["get", "delete"]
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def get_context_data(self, **context):
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"""
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Checks permission and parses query parameters.
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"""
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if not has_perm(self.request.user, "core.can_see_history"):
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self.permission_denied(self.request)
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type = self.request.query_params.get("type")
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value = self.request.query_params.get("value")
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if type not in ("element"):
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raise ValidationError(
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{"detail": "Invalid input. Type should be 'element' or 'text'."}
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)
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# We currently just support searching by element id.
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data = self.get_data_element_search(value)
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return data
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def get_data_element_search(self, value):
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"""
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Retrieves history information for element search.
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"""
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data = []
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for instance in History.objects.filter(element_id=value).order_by("-now"):
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if instance.information:
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data.append(
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{
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"element_id": instance.element_id,
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"timestamp": instance.now.timestamp(),
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"information": instance.information,
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"user_id": instance.user.pk if instance.user else None,
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}
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)
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return data
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def delete(self, request, *args, **kwargs):
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"""
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Deletes and rebuilds the history.
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"""
|
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# Check permission
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if not in_some_groups(request.user.pk or 0, [GROUP_ADMIN_PK]):
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self.permission_denied(request)
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# Delete history data and history (via CASCADE)
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HistoryData.objects.all().delete()
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# Rebuild history.
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History.objects.build_history()
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return Response({"detail": "History was deleted and rebuild successfully."})
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class HistoryDataView(utils_views.APIView):
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"""
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View to retrieve the history data of OpenSlides.
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Use query paramter timestamp (UNIX timestamp) to get all elements from begin
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until (including) this timestamp.
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"""
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http_method_names = ["get"]
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def get_context_data(self, **context):
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"""
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Checks if user is in admin group. If yes, all history data until
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(including) timestamp are collected to build a valid dataset for the client.
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"""
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if not in_some_groups(self.request.user.pk or 0, [GROUP_ADMIN_PK]):
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self.permission_denied(self.request)
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try:
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timestamp = int(self.request.query_params.get("timestamp", 0))
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except ValueError:
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raise ValidationError(
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{"detail": "Invalid input. Timestamp should be an integer."}
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)
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queryset = History.objects.select_related("full_data")
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if timestamp:
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queryset = queryset.filter(
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now__lte=datetime.datetime.fromtimestamp(timestamp)
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)
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# collection <--> id <--> full_data
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dataset: Dict[str, Dict[int, Any]] = defaultdict(dict)
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for instance in queryset:
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collection, id = split_element_id(instance.element_id)
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full_data = instance.full_data.full_data
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if full_data:
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dataset[collection][id] = full_data
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else:
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del dataset[collection][id]
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|
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return {
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collection: list(dataset[collection].values())
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|
for collection in dataset.keys()
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|
}
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