Delete all notes for user

https://openedx.atlassian.net/browse/EDUCATOR-2657

.gitignore

@@ -11,3 +11,7 @@ coverage/
 
 #vim
 *.swp
+
+venv/
+
+.idea/

notesapi/v1/tests/test_views.py

 # -*- coding: utf-8 -*-
-import urlparse
-import jwt
-import unittest
-import ddt
 from calendar import timegm
 from datetime import datetime, timedelta
-from mock import patch
+import ddt
+import jwt
+import unittest
+import urlparse
 
+from django.conf import settings
 from django.core.management import call_command
 from django.core.urlresolvers import reverse
-from django.conf import settings
 from django.test.utils import override_settings
-
+from mock import patch
 from rest_framework import status
 from rest_framework.test import APITestCase
 
@@ -508,6 +507,42 @@ class AnnotationListViewTests(BaseAnnotationViewTests):
             start=start
         )
 
+    def test_delete_all_user_annotations(self, user_id=TEST_USER):
+        """
+        Verify that deleting all user annotations works
+        """
+        self._create_annotation(text=u'Comment with foo', tags=[u'bar'])
+        self._create_annotation(text=u'Another comment', tags=[u'foo'])
+        self._create_annotation(text=u'A longer comment with bar', tags=[u'foo'])
+        response = self._get_search_results()
+        self.assertEqual(response["total"], 3)
+
+        url = reverse('api:v1:annotations')
+        self.payload["user_id"] = user_id
+        # Delete all notes for User 1
+        response = self.client.delete(url, headers=self.headers, data=self.payload)
+        self.assertEqual(response.status_code, status.HTTP_200_OK)
+
+        # Verify notes are deleted for User 1
+        response = self._get_search_results()
+        self.assertEqual(response["total"], 0)
+
+        # Reattempt delete for User 1
+        response = self.client.delete(url, headers=self.headers, data=self.payload)
+        self.assertEqual(response.status_code, status.HTTP_200_OK)
+
+    def test_delete_all_user_annotations_no_user(self):
+        # Delete for No User
+        url = reverse('api:v1:annotations')
+        response = self.client.delete(url, headers=self.headers, data=self.payload)
+        self.assertEqual(response.status_code, status.HTTP_400_BAD_REQUEST)
+
+    def test_delete_all_user_annotations_other_user(self):
+        url = reverse('api:v1:annotations')
+        self.payload["user_id"] = TEST_OTHER_USER
+        response = self.client.delete(url, headers=self.headers, data=self.payload)
+        self.assertEqual(response.status_code, status.HTTP_200_OK)
+
 
 @ddt.ddt
 class AnnotationDetailViewTests(BaseAnnotationViewTests):

notesapi/v1/views.py

-import logging
 import json
-import newrelic.agent
+import logging
 
+import newrelic.agent
 from django.conf import settings
-from django.core.urlresolvers import reverse
 from django.core.exceptions import ValidationError
+from django.core.urlresolvers import reverse
 from django.db.models import Q
 from django.utils.translation import ugettext as _
-
 from rest_framework import status
 from rest_framework.generics import GenericAPIView
 from rest_framework.response import Response
 from rest_framework.views import APIView
 
 from haystack.query import SQ
-
 from notesapi.v1.models import Note
-from notesapi.v1.serializers import NoteSerializer, NotesElasticSearchSerializer
+from notesapi.v1.serializers import (NotesElasticSearchSerializer,
+                                     NoteSerializer)
 
 if not settings.ES_DISABLED:
     from notesserver.highlight import SearchQuerySet
@@ -349,6 +348,18 @@ class AnnotationListView(GenericAPIView):
         serializer = NoteSerializer(note)
         return Response(serializer.data, status=status.HTTP_201_CREATED, headers={'Location': location})
 
+    def delete(self, *args, **kwargs):  # pylint: disable=unused-argument
+        """
+        Delete all annotations for user_id
+
+        """
+        params = self.request.data
+        if 'user_id' not in params:
+            return Response(status=status.HTTP_400_BAD_REQUEST)
+
+        Note.objects.filter(user_id=params['user_id']).delete()
+        return Response(status=status.HTTP_200_OK)
+
 
 class AnnotationDetailView(APIView):
     """