Add set-tasks endpoint

isic/core/views.py

@@ -1,4 +1,3 @@
-from collections import defaultdict
 import json
 
 from django.conf import settings
@@ -27,13 +26,6 @@
 from isic.studies.models import Annotation, Study, StudyTask
 
 
-def key_by(sequence, f):
-    r = defaultdict(list)
-    for item in sequence:
-        r[f(item)].append(item)
-    return dict(r)
-
-
 @needs_object_permission('auth.view_staff')
 def staff_list(request):
     users = User.objects.filter(is_staff=True).order_by('email')

isic/studies/api.py

@@ -1,29 +1,99 @@
+from django.contrib.auth.models import User
+from django.db import transaction
+from django.db.models.query_utils import Q
+from django.http.response import JsonResponse
 from rest_framework import viewsets
+from rest_framework.decorators import action
+from rest_framework.exceptions import PermissionDenied
 from rest_framework.permissions import IsAdminUser
 
+from isic.core.api import Conflict
+from isic.core.permissions import IsicObjectPermissionsFilter, get_visible_objects
 from isic.studies.models import Annotation, Study, StudyTask
-from isic.studies.serializers import AnnotationSerializer, StudySerializer, StudyTaskSerializer
+from isic.studies.serializers import (
+    AnnotationSerializer,
+    StudySerializer,
+    StudyTaskAssignmentSerializer,
+    StudyTaskSerializer,
+)
 
 
 class StudyTaskViewSet(viewsets.ReadOnlyModelViewSet):
     serializer_class = StudyTaskSerializer
     queryset = StudyTask.objects.all()
     permission_classes = [IsAdminUser]
+    filter_backends = [IsicObjectPermissionsFilter]
 
     swagger_schema = None
 
 
 class StudyViewSet(viewsets.ReadOnlyModelViewSet):
     serializer_class = StudySerializer
-    queryset = Study.objects.all()
-    permission_classes = [IsAdminUser]
+    queryset = Study.objects.distinct()
+    filter_backends = [IsicObjectPermissionsFilter]
 
     swagger_schema = None
 
+    @action(detail=True, methods=['post'], pagination_class=None, url_path='set-tasks')
+    def set_tasks(self, request, *args, **kwargs):
+        study: Study = self.get_object()
+        if not request.user.has_perm('studies.modify_study', study):
+            raise PermissionDenied
+        elif study.tasks.filter(annotation__isnull=False).exists():
+            raise Conflict('Study has answered questions, tasks cannot be overwritten.')
+
+        serializer = StudyTaskAssignmentSerializer(data=request.data, many=True, max_length=100)
+        serializer.is_valid(raise_exception=True)
+
+        isic_ids = [x['isic_id'] for x in serializer.validated_data]
+        identifier_filter = Q()
+        for data in serializer.validated_data:
+            identifier_filter |= Q(profile__hash_id__iexact=data['user_hash_id_or_email'])
+            identifier_filter |= Q(email__iexact=data['user_hash_id_or_email'])
+
+        requested_users = (
+            User.objects.select_related('profile').filter(is_active=True).filter(identifier_filter)
+        )
+        # create a lookup dictionary that keys users by their hash id and email
+        requested_users_lookup = {}
+        for user in requested_users:
+            requested_users_lookup[user.profile.hash_id] = user
+            requested_users_lookup[user.email] = user
+
+        requested_images = study.collection.images.filter(isic_id__in=isic_ids)
+        visible_images = get_visible_objects(
+            request.user, 'core.view_image', requested_images
+        ).in_bulk(field_name='isic_id')
+
+        summary = {
+            'image_no_perms_or_does_not_exist': [],
+            'user_does_not_exist': [],
+            'succeeded': [],
+        }
+
+        with transaction.atomic():
+            for task_assignment in serializer.validated_data:
+                if task_assignment['user_hash_id_or_email'] not in requested_users_lookup:
+                    summary['user_does_not_exist'].append(task_assignment['user_hash_id_or_email'])
+                elif task_assignment['isic_id'] not in visible_images:
+                    summary['image_no_perms_or_does_not_exist'].append(task_assignment['isic_id'])
+                else:
+                    StudyTask.objects.create(
+                        study=study,
+                        annotator=requested_users_lookup[task_assignment['user_hash_id_or_email']],
+                        image=visible_images[task_assignment['isic_id']],
+                    )
+                    summary['succeeded'].append(
+                        f'{task_assignment["isic_id"]}/{task_assignment["user_hash_id_or_email"]}'
+                    )
+
+        return JsonResponse(summary)
+
 
 class AnnotationViewSet(viewsets.ReadOnlyModelViewSet):
     serializer_class = AnnotationSerializer
     queryset = Annotation.objects.all()
     permission_classes = [IsAdminUser]
+    filter_backends = [IsicObjectPermissionsFilter]
 
     swagger_schema = None

isic/studies/models.py

@@ -193,8 +193,27 @@ class Meta:
 
 class StudyPermissions:
     model = Study
-    perms = ['view_study', 'view_study_results']
-    filters = {'view_study': 'view_study_list', 'view_study_results': 'view_study_results_list'}
+    perms = ['view_study', 'view_study_results', 'modify_study']
+    filters = {
+        'view_study': 'view_study_list',
+        'view_study_results': 'view_study_results_list',
+        'modify_study': 'modify_study_list',
+    }
+
+    @staticmethod
+    def modify_study_list(user_obj: User, qs: QuerySet[Study] | None = None) -> QuerySet[Study]:
+        qs: QuerySet[Study] = qs if qs is not None else Study._default_manager.all()
+
+        if user_obj.is_staff:
+            return qs
+        elif user_obj.is_authenticated:
+            return qs.filter(creator=user_obj)
+        else:
+            return qs.none()
+
+    @staticmethod
+    def modify_study(user_obj, obj):
+        return StudyPermissions.modify_study_list(user_obj).contains(obj)
 
     @staticmethod
     def view_study_results_list(

isic/studies/serializers.py

@@ -1,5 +1,6 @@
 from rest_framework import serializers
 
+from isic.core.constants import ISIC_ID_REGEX
 from isic.studies.models import Annotation, Feature, Question, QuestionChoice, Study, StudyTask
 
 
@@ -32,7 +33,7 @@ class QuestionSerializer(serializers.ModelSerializer):
 
     class Meta:
         model = Question
-        fields = ['id', 'required', 'type', 'prompt', 'official', 'choices']
+        fields = ['id', 'type', 'prompt', 'official', 'choices']
 
 
 class StudySerializer(serializers.ModelSerializer):
@@ -41,4 +42,18 @@ class StudySerializer(serializers.ModelSerializer):
 
     class Meta:
         model = Study
-        fields = ['id', 'created', 'creator', 'name', 'description', 'features', 'questions']
+        fields = [
+            'id',
+            'created',
+            'creator',
+            'name',
+            'description',
+            'public',
+            'features',
+            'questions',
+        ]
+
+
+class StudyTaskAssignmentSerializer(serializers.Serializer):
+    isic_id = serializers.RegexField(ISIC_ID_REGEX)
+    user_hash_id_or_email = serializers.CharField()

isic/studies/tests/conftest.py

@@ -0,0 +1,60 @@
+import pytest
+
+
+@pytest.fixture
+def public_study(study_factory, user_factory):
+    creator = user_factory()
+    owners = [creator] + [user_factory() for _ in range(2)]
+    return study_factory(public=True, creator=creator, owners=owners)
+
+
+@pytest.fixture
+def private_study(study_factory, user_factory):
+    creator = user_factory()
+    owners = [creator] + [user_factory() for _ in range(2)]
+    return study_factory(public=False, creator=creator, owners=owners)
+
+
+@pytest.fixture
+def private_study_and_guest(private_study, user_factory):
+    return private_study, user_factory()
+
+
+@pytest.fixture
+def private_study_and_annotator(private_study, user_factory, study_task_factory):
+    u = user_factory()
+    study_task_factory(annotator=u, study=private_study)
+    return private_study, u
+
+
+@pytest.fixture
+def private_study_and_owner(private_study):
+    return private_study, private_study.owners.first()
+
+
+@pytest.fixture
+def private_study_with_responses(study_factory, user_factory, response_factory):
+    # create a scenario for testing that a user can only see their responses and
+    # not another annotators.
+    study = study_factory(public=False)
+    u1, u2 = user_factory(), user_factory()
+    response_factory(
+        annotation__annotator=u1,
+        annotation__study=study,
+        annotation__task__annotator=u1,
+        annotation__task__study=study,
+    )
+    response_factory(
+        annotation__annotator=u2,
+        annotation__study=study,
+        annotation__task__annotator=u2,
+        annotation__task__study=study,
+    )
+    return study, u1, u2
+
+
+@pytest.fixture
+def study_task_with_user(study_task_factory, user_factory):
+    u = user_factory()
+    study_task = study_task_factory(annotator=u)
+    return study_task

isic/studies/tests/test_api.py

@@ -0,0 +1,44 @@
+from unittest import TestCase
+
+import pytest
+
+from isic.studies.models import StudyTask
+
+
+@pytest.fixture
+def study_with_images(user_factory, image_factory, collection_factory, study_factory):
+    user = user_factory()
+    collection = collection_factory(creator=user, public=True)
+    images = [image_factory(public=True) for _ in range(2)]
+    collection.images.add(*images)
+    study = study_factory(creator=user, collection=collection)
+    return study, images
+
+
+@pytest.mark.django_db
+def test_set_tasks(api_client, study_with_images, user_factory):
+    users = [user_factory() for _ in range(2)]
+    study, images = study_with_images
+    api_client.force_login(study.creator)
+
+    r = api_client.post(
+        f'/api/v2/studies/{study.pk}/set-tasks/',
+        [
+            {'isic_id': images[0].isic_id, 'user_hash_id_or_email': users[0].profile.hash_id},
+            {'isic_id': images[1].isic_id, 'user_hash_id_or_email': users[1].email},
+            # bad image
+            {'isic_id': 'ISIC_9999999', 'user_hash_id_or_email': users[1].email},
+            # bad user
+            {'isic_id': images[1].isic_id, 'user_hash_id_or_email': 'FAKEUSER'},
+        ],
+    )
+    assert r.status_code == 200, r.json()
+    assert StudyTask.objects.count() == 2
+
+    tasks_actual = list(StudyTask.objects.all().values('study', 'annotator', 'image'))
+    tasks_expected = [
+        {'study': study.pk, 'annotator': users[0].pk, 'image': images[0].pk},
+        {'study': study.pk, 'annotator': users[1].pk, 'image': images[1].pk},
+    ]
+    for task_actual, task_expected in zip(tasks_actual, tasks_expected):
+        TestCase().assertDictEqual(task_actual, task_expected)