447 lines
16 KiB
Python
447 lines
16 KiB
Python
"""
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Views for the notifications API.
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"""
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from datetime import datetime, timedelta
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from django.conf import settings
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from django.db.models import Count
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from django.shortcuts import get_object_or_404
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from django.utils.translation import gettext as _
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from opaque_keys.edx.keys import CourseKey
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from pytz import UTC
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from rest_framework import generics, status
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from rest_framework.decorators import api_view
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from rest_framework.generics import UpdateAPIView
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from rest_framework.response import Response
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from rest_framework.views import APIView
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from common.djangoapps.student.models import CourseEnrollment
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from openedx.core.djangoapps.notifications.email.utils import update_user_preferences_from_patch
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from openedx.core.djangoapps.notifications.models import (
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CourseNotificationPreference,
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get_course_notification_preference_config_version
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)
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from openedx.core.djangoapps.notifications.permissions import allow_any_authenticated_user
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from .base_notification import COURSE_NOTIFICATION_APPS
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from .config.waffle import ENABLE_NOTIFICATIONS
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from .events import (
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notification_preference_update_event,
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notification_preferences_viewed_event,
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notification_read_event,
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notification_tray_opened_event,
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notifications_app_all_read_event
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)
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from .models import Notification
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from .serializers import (
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NotificationCourseEnrollmentSerializer,
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NotificationSerializer,
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UserCourseNotificationPreferenceSerializer,
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UserNotificationPreferenceUpdateSerializer,
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)
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from .utils import get_show_notifications_tray, get_is_new_notification_view_enabled
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@allow_any_authenticated_user()
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class CourseEnrollmentListView(generics.ListAPIView):
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"""
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API endpoint to get active CourseEnrollments for requester.
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**Permissions**: User must be authenticated.
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**Response Format** (paginated):
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{
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"next": (str) url_to_next_page_of_courses,
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"previous": (str) url_to_previous_page_of_courses,
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"count": (int) total_number_of_courses,
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"num_pages": (int) total_number_of_pages,
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"current_page": (int) current_page_number,
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"start": (int) index_of_first_course_on_page,
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"results" : [
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{
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"course": {
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"id": (int) course_id,
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"display_name": (str) course_display_name
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},
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},
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...
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],
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}
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Response Error Codes:
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- 403: The requester cannot access resource.
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"""
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serializer_class = NotificationCourseEnrollmentSerializer
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def get_paginated_response(self, data):
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"""
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Return a response given serialized page data with show_preferences flag.
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"""
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response = super().get_paginated_response(data)
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response.data["show_preferences"] = get_show_notifications_tray(self.request.user)
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return response
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def get_queryset(self):
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user = self.request.user
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return CourseEnrollment.objects.filter(user=user, is_active=True)
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def list(self, request, *args, **kwargs):
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"""
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Returns the list of active course enrollments for which ENABLE_NOTIFICATIONS
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Waffle flag is enabled
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"""
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queryset = self.filter_queryset(self.get_queryset())
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course_ids = queryset.values_list('course_id', flat=True)
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for course_id in course_ids:
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if not ENABLE_NOTIFICATIONS.is_enabled(course_id):
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queryset = queryset.exclude(course_id=course_id)
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queryset = queryset.select_related('course').order_by('-id')
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page = self.paginate_queryset(queryset)
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if page is not None:
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serializer = self.get_serializer(page, many=True)
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return self.get_paginated_response(serializer.data)
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return Response({
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"show_preferences": get_show_notifications_tray(request.user),
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"results": self.get_serializer(queryset, many=True).data
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})
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@allow_any_authenticated_user()
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class UserNotificationPreferenceView(APIView):
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"""
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Supports retrieving and patching the UserNotificationPreference
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model.
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**Example Requests**
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GET /api/notifications/configurations/{course_id}
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PATCH /api/notifications/configurations/{course_id}
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**Example Response**:
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{
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'id': 1,
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'course_name': 'testcourse',
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'course_id': 'course-v1:testorg+testcourse+testrun',
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'notification_preference_config': {
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'discussion': {
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'enabled': False,
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'core': {
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'info': '',
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'web': False,
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'push': False,
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'email': False,
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},
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'notification_types': {
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'new_post': {
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'info': '',
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'web': False,
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'push': False,
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'email': False,
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},
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},
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'not_editable': {},
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},
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}
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}
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"""
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def get(self, request, course_key_string):
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"""
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Returns notification preference for user for a course.
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Parameters:
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request (Request): The request object.
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course_key_string (int): The ID of the course to retrieve notification preference.
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Returns:
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{
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'id': 1,
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'course_name': 'testcourse',
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'course_id': 'course-v1:testorg+testcourse+testrun',
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'notification_preference_config': {
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'discussion': {
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'enabled': False,
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'core': {
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'info': '',
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'web': False,
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'push': False,
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'email': False,
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},
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'notification_types': {
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'new_post': {
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'info': '',
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'web': False,
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'push': False,
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'email': False,
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},
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},
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'not_editable': {},
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},
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}
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}
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"""
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course_id = CourseKey.from_string(course_key_string)
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user_preference = CourseNotificationPreference.get_updated_user_course_preferences(request.user, course_id)
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serializer_context = {
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'course_id': course_id,
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'user': request.user
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}
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serializer = UserCourseNotificationPreferenceSerializer(user_preference, context=serializer_context)
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notification_preferences_viewed_event(request, course_id)
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return Response(serializer.data)
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def patch(self, request, course_key_string):
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"""
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Update an existing user notification preference with the data in the request body.
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Parameters:
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request (Request): The request object
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course_key_string (int): The ID of the course of the notification preference to be updated.
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Returns:
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200: The updated preference, serialized using the UserNotificationPreferenceSerializer
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404: If the preference does not exist
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403: If the user does not have permission to update the preference
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400: Validation error
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"""
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course_id = CourseKey.from_string(course_key_string)
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user_course_notification_preference = CourseNotificationPreference.objects.get(
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user=request.user,
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course_id=course_id,
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is_active=True,
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)
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if user_course_notification_preference.config_version != get_course_notification_preference_config_version():
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return Response(
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{'error': _('The notification preference config version is not up to date.')},
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status=status.HTTP_409_CONFLICT,
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)
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if request.data.get('notification_channel', '') == 'email_cadence':
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request.data['email_cadence'] = request.data['value']
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del request.data['value']
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preference_update = UserNotificationPreferenceUpdateSerializer(
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user_course_notification_preference, data=request.data, partial=True
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)
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preference_update.is_valid(raise_exception=True)
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updated_notification_preferences = preference_update.save()
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notification_preference_update_event(request.user, course_id, preference_update.validated_data)
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serializer_context = {
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'course_id': course_id,
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'user': request.user
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}
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serializer = UserCourseNotificationPreferenceSerializer(updated_notification_preferences,
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context=serializer_context)
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return Response(serializer.data, status=status.HTTP_200_OK)
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@allow_any_authenticated_user()
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class NotificationListAPIView(generics.ListAPIView):
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"""
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API view for listing notifications for a user.
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**Permissions**: User must be authenticated.
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**Response Format** (paginated):
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{
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"results" : [
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{
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"id": (int) notification_id,
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"app_name": (str) app_name,
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"notification_type": (str) notification_type,
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"content": (str) content,
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"content_context": (dict) content_context,
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"content_url": (str) content_url,
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"last_read": (datetime) last_read,
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"last_seen": (datetime) last_seen
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},
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...
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],
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"count": (int) total_number_of_notifications,
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"next": (str) url_to_next_page_of_notifications,
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"previous": (str) url_to_previous_page_of_notifications,
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"page_size": (int) number_of_notifications_per_page,
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}
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Response Error Codes:
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- 403: The requester cannot access resource.
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"""
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serializer_class = NotificationSerializer
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def get_queryset(self):
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"""
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Override the get_queryset method to filter the queryset by app name, request.user and created
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"""
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expiry_date = datetime.now(UTC) - timedelta(days=settings.NOTIFICATIONS_EXPIRY)
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app_name = self.request.query_params.get('app_name')
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if self.request.query_params.get('tray_opened'):
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unseen_count = Notification.objects.filter(user_id=self.request.user, last_seen__isnull=True).count()
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notification_tray_opened_event(self.request.user, unseen_count)
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params = {
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'user': self.request.user,
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'created__gte': expiry_date,
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'web': True
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}
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if app_name:
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params['app_name'] = app_name
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return Notification.objects.filter(**params).order_by('-created')
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@allow_any_authenticated_user()
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class NotificationCountView(APIView):
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"""
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API view for getting the unseen notifications count and show_notification_tray flag for a user.
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"""
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def get(self, request):
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"""
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Get the unseen notifications count and show_notification_tray flag for a user.
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**Permissions**: User must be authenticated.
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**Response Format**:
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```json
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{
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"show_notifications_tray": (bool) show_notifications_tray,
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"count": (int) total_number_of_unseen_notifications,
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"count_by_app_name": {
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(str) app_name: (int) number_of_unseen_notifications,
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...
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},
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"notification_expiry_days": 60
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}
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```
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**Response Error Codes**:
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- 403: The requester cannot access resource.
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"""
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# Get the unseen notifications count for each app name.
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count_by_app_name = (
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Notification.objects
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.filter(user_id=request.user, last_seen__isnull=True)
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.values('app_name')
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.annotate(count=Count('*'))
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)
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count_total = 0
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show_notifications_tray = get_show_notifications_tray(self.request.user)
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is_new_notification_view_enabled = get_is_new_notification_view_enabled()
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count_by_app_name_dict = {
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app_name: 0
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for app_name in COURSE_NOTIFICATION_APPS
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}
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for item in count_by_app_name:
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app_name = item['app_name']
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count = item['count']
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count_total += count
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count_by_app_name_dict[app_name] = count
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return Response({
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"show_notifications_tray": show_notifications_tray,
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"count": count_total,
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"count_by_app_name": count_by_app_name_dict,
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"notification_expiry_days": settings.NOTIFICATIONS_EXPIRY,
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"is_new_notification_view_enabled": is_new_notification_view_enabled
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})
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@allow_any_authenticated_user()
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class MarkNotificationsSeenAPIView(UpdateAPIView):
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"""
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API view for marking user's all notifications seen for a provided app_name.
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"""
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def update(self, request, *args, **kwargs):
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"""
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Marks all notifications for the given app name seen for the authenticated user.
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**Args:**
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app_name: The name of the app to mark notifications seen for.
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**Response Format:**
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A `Response` object with a 200 OK status code if the notifications were successfully marked seen.
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**Response Error Codes**:
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- 400: Bad Request status code if the app name is invalid.
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"""
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app_name = self.kwargs.get('app_name')
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if not app_name:
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return Response({'error': _('Invalid app name.')}, status=400)
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notifications = Notification.objects.filter(
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user=request.user,
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app_name=app_name,
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last_seen__isnull=True,
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)
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notifications.update(last_seen=datetime.now())
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return Response({'message': _('Notifications marked as seen.')}, status=200)
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@allow_any_authenticated_user()
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class NotificationReadAPIView(APIView):
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"""
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API view for marking user notifications as read, either all notifications or a single notification
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"""
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def patch(self, request, *args, **kwargs):
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"""
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Marks all notifications or single notification read for the given
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app name or notification id for the authenticated user.
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Requests:
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PATCH /api/notifications/read/
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Parameters:
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request (Request): The request object containing the app name or notification id.
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{
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"app_name": (str) app_name,
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"notification_id": (int) notification_id
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}
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Returns:
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- 200: OK status code if the notification or notifications were successfully marked read.
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- 400: Bad Request status code if the app name is invalid.
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- 403: Forbidden status code if the user is not authenticated.
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- 404: Not Found status code if the notification was not found.
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"""
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notification_id = request.data.get('notification_id', None)
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read_at = datetime.now(UTC)
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if notification_id:
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notification = get_object_or_404(Notification, pk=notification_id, user=request.user)
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first_time_read = notification.last_read is None
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notification.last_read = read_at
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notification.save()
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notification_read_event(request.user, notification, first_time_read)
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return Response({'message': _('Notification marked read.')}, status=status.HTTP_200_OK)
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app_name = request.data.get('app_name', '')
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if app_name in COURSE_NOTIFICATION_APPS:
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notifications = Notification.objects.filter(
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user=request.user,
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app_name=app_name,
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last_read__isnull=True,
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)
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notifications.update(last_read=read_at)
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notifications_app_all_read_event(request.user, app_name)
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return Response({'message': _('Notifications marked read.')}, status=status.HTTP_200_OK)
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return Response({'error': _('Invalid app_name or notification_id.')}, status=status.HTTP_400_BAD_REQUEST)
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@api_view(['GET', 'POST'])
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def preference_update_from_encrypted_username_view(request, username, patch):
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"""
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View to update user preferences from encrypted username and patch.
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username and patch must be string
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"""
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update_user_preferences_from_patch(username, patch)
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return Response({"result": "success"}, status=status.HTTP_200_OK)
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