implement forums endpoint for searching users

lms/djangoapps/django_comment_client/base/tests.py

 import logging
 import json
 
-from django.test.utils import override_settings
 from django.test.client import Client, RequestFactory
+from django.test.utils import override_settings
 from django.contrib.auth.models import User
-from student.tests.factories import CourseEnrollmentFactory, UserFactory
-from xmodule.modulestore.tests.factories import CourseFactory
-from xmodule.modulestore.tests.django_utils import ModuleStoreTestCase
-from django.core.urlresolvers import reverse
 from django.core.management import call_command
-from util.testing import UrlResetMixin
-from django_comment_common.models import Role
-from django_comment_common.utils import seed_permissions_roles
-from django_comment_client.base import views
-from django_comment_client.tests.unicode import UnicodeTestMixin
+from django.core.urlresolvers import reverse
+from mock import patch, ANY
+from nose.tools import assert_true, assert_equal  # pylint: disable=E0611
+from opaque_keys.edx.locations import SlashSeparatedCourseKey
 
 from courseware.tests.modulestore_config import TEST_DATA_MIXED_MODULESTORE
-from nose.tools import assert_true, assert_equal  # pylint: disable=E0611
-from mock import patch, ANY
+from django_comment_client.base import views
+from django_comment_client.tests.unicode import UnicodeTestMixin
+from django_comment_common.models import Role, FORUM_ROLE_STUDENT
+from django_comment_common.utils import seed_permissions_roles
+from student.tests.factories import CourseEnrollmentFactory, UserFactory
+from util.testing import UrlResetMixin
+from xmodule.modulestore.tests.factories import CourseFactory
+from xmodule.modulestore.tests.django_utils import ModuleStoreTestCase
 
 log = logging.getLogger(__name__)
 
@@ -732,3 +733,85 @@ class CreateSubCommentUnicodeTestCase(ModuleStoreTestCase, UnicodeTestMixin, Moc
         self.assertEqual(response.status_code, 200)
         self.assertTrue(mock_request.called)
         self.assertEqual(mock_request.call_args[1]["data"]["body"], text)
+
+
+@override_settings(MODULESTORE=TEST_DATA_MIXED_MODULESTORE)
+class UsersEndpointTestCase(ModuleStoreTestCase, MockRequestSetupMixin):
+
+    def set_post_counts(self, mock_request, threads_count=1, comments_count=1):
+        """
+        sets up a mock response from the comments service for getting post counts for our other_user
+        """
+        self._set_mock_request_data(mock_request, {
+            "threads_count": threads_count,
+            "comments_count": comments_count,
+        })
+
+    def setUp(self):
+        self.course = CourseFactory.create()
+        seed_permissions_roles(self.course.id)
+        self.student = UserFactory.create()
+        self.enrollment = CourseEnrollmentFactory(user=self.student, course_id=self.course.id)
+        self.other_user = UserFactory.create(username="other")
+        CourseEnrollmentFactory(user=self.other_user, course_id=self.course.id)
+
+    def make_request(self, method='get', course_id=None, **kwargs):
+        course_id = course_id or self.course.id
+        request = getattr(RequestFactory(), method)("dummy_url", kwargs)
+        request.user = self.student
+        request.view_name = "users"
+        return views.users(request, course_id=course_id.to_deprecated_string())
+
+    @patch('lms.lib.comment_client.utils.requests.request')
+    def test_finds_exact_match(self, mock_request):
+        self.set_post_counts(mock_request)
+        response = self.make_request(username="other")
+        self.assertEqual(response.status_code, 200)
+        self.assertEqual(
+            json.loads(response.content)["users"],
+            [{"id": self.other_user.id, "username": self.other_user.username}]
+        )
+
+    @patch('lms.lib.comment_client.utils.requests.request')
+    def test_finds_no_match(self, mock_request):
+        self.set_post_counts(mock_request)
+        response = self.make_request(username="othor")
+        self.assertEqual(response.status_code, 200)
+        self.assertEqual(json.loads(response.content)["users"], [])
+
+    def test_requires_GET(self):
+        response = self.make_request(method='post', username="other")
+        self.assertEqual(response.status_code, 405)
+
+    def test_requires_username_param(self):
+        response = self.make_request()
+        self.assertEqual(response.status_code, 400)
+        content = json.loads(response.content)
+        self.assertIn("errors", content)
+        self.assertNotIn("users", content)
+
+    def test_course_does_not_exist(self):
+        course_id = SlashSeparatedCourseKey.from_deprecated_string("does/not/exist")
+        response = self.make_request(course_id=course_id, username="other")
+
+        self.assertEqual(response.status_code, 404)
+        content = json.loads(response.content)
+        self.assertIn("errors", content)
+        self.assertNotIn("users", content)
+
+    def test_requires_requestor_enrolled_in_course(self):
+        # unenroll self.student from the course.
+        self.enrollment.delete()
+
+        response = self.make_request(username="other")
+        self.assertEqual(response.status_code, 404)
+        content = json.loads(response.content)
+        self.assertTrue(content.has_key("errors"))
+        self.assertFalse(content.has_key("users"))
+
+    @patch('lms.lib.comment_client.utils.requests.request')
+    def test_requires_matched_user_has_forum_content(self, mock_request):
+        self.set_post_counts(mock_request, 0, 0)
+        response = self.make_request(username="other")
+        self.assertEqual(response.status_code, 200)
+        self.assertEqual(json.loads(response.content)["users"], [])

lms/djangoapps/django_comment_client/base/urls.py

@@ -27,4 +27,5 @@ urlpatterns = patterns('django_comment_client.base.views',  # nopep8
     url(r'^(?P<commentable_id>[\w\-.]+)/threads/create$', 'create_thread', name='create_thread'),
     url(r'^(?P<commentable_id>[\w\-.]+)/follow$', 'follow_commentable', name='follow_commentable'),
     url(r'^(?P<commentable_id>[\w\-.]+)/unfollow$', 'unfollow_commentable', name='unfollow_commentable'),
+    url(r'users$', 'users', name='users'),
 )

lms/djangoapps/django_comment_client/base/views.py

-import time
-import random
-import os.path
+import functools
 import logging
+import os.path
+import random
+import time
 import urlparse
-import functools
 
-import lms.lib.comment_client as cc
-import django_comment_client.utils as utils
-import django_comment_client.settings as cc_settings
-
-
-from django.core import exceptions
 from django.contrib.auth.decorators import login_required
-from django.views.decorators.http import require_POST
-from django.views.decorators import csrf
+from django.contrib.auth.models import User
+from django.core import exceptions
 from django.core.files.storage import get_storage_class
+from django.http import Http404
 from django.utils.translation import ugettext as _
+from django.views.decorators import csrf
+from django.views.decorators.http import require_GET, require_POST
+from opaque_keys.edx.keys import CourseKey
+from opaque_keys.edx.locations import SlashSeparatedCourseKey
 
+from courseware.access import has_access
 from courseware.courses import get_course_with_access, get_course_by_id
 from course_groups.cohorts import get_cohort_id, is_commentable_cohorted
-
-from django_comment_client.utils import JsonResponse, JsonError, extract, add_courseware_context
-
+import django_comment_client.settings as cc_settings
+from django_comment_client.utils import (
+    add_courseware_context,
+    get_annotated_content_info,
+    get_ability,
+    JsonError,
+    JsonResponse,
+    safe_content
+)
 from django_comment_client.permissions import check_permissions_by_view, cached_has_permission
-from courseware.access import has_access
-from opaque_keys.edx.locations import SlashSeparatedCourseKey
-from opaque_keys.edx.keys import CourseKey
+import lms.lib.comment_client as cc
 
 log = logging.getLogger(__name__)
 
@@ -51,9 +55,9 @@ def permitted(fn):
 
 def ajax_content_response(request, course_id, content):
     user_info = cc.User.from_django_user(request.user).to_dict()
-    annotated_content_info = utils.get_annotated_content_info(course_id, content, request.user, user_info)
+    annotated_content_info = get_annotated_content_info(course_id, content, request.user, user_info)
     return JsonResponse({
-        'content': utils.safe_content(content),
+        'content': safe_content(content),
         'annotated_content_info': annotated_content_info,
     })
 
@@ -133,7 +137,7 @@ def create_thread(request, course_id, commentable_id):
     if request.is_ajax():
         return ajax_content_response(request, course_id, data)
     else:
-        return JsonResponse(utils.safe_content(data))
+        return JsonResponse(safe_content(data))
 
 
 @require_POST
@@ -154,7 +158,7 @@ def update_thread(request, course_id, thread_id):
     if request.is_ajax():
         return ajax_content_response(request, SlashSeparatedCourseKey.from_deprecated_string(course_id), thread.to_dict())
     else:
-        return JsonResponse(utils.safe_content(thread.to_dict()))
+        return JsonResponse(safe_content(thread.to_dict()))
 
 
 def _create_comment(request, course_key, thread_id=None, parent_id=None):
@@ -195,7 +199,7 @@ def _create_comment(request, course_key, thread_id=None, parent_id=None):
     if request.is_ajax():
         return ajax_content_response(request, course_key, comment.to_dict())
     else:
-        return JsonResponse(utils.safe_content(comment.to_dict()))
+        return JsonResponse(safe_content(comment.to_dict()))
 
 
 @require_POST
@@ -222,7 +226,7 @@ def delete_thread(request, course_id, thread_id):
     """
     thread = cc.Thread.find(thread_id)
     thread.delete()
-    return JsonResponse(utils.safe_content(thread.to_dict()))
+    return JsonResponse(safe_content(thread.to_dict()))
 
 
 @require_POST
@@ -241,7 +245,7 @@ def update_comment(request, course_id, comment_id):
     if request.is_ajax():
         return ajax_content_response(request, SlashSeparatedCourseKey.from_deprecated_string(course_id), comment.to_dict())
     else:
-        return JsonResponse(utils.safe_content(comment.to_dict()))
+        return JsonResponse(safe_content(comment.to_dict()))
 
 
 @require_POST
@@ -255,7 +259,7 @@ def endorse_comment(request, course_id, comment_id):
     comment = cc.Comment.find(comment_id)
     comment.endorsed = request.POST.get('endorsed', 'false').lower() == 'true'
     comment.save()
-    return JsonResponse(utils.safe_content(comment.to_dict()))
+    return JsonResponse(safe_content(comment.to_dict()))
 
 
 @require_POST
@@ -271,8 +275,8 @@ def openclose_thread(request, course_id, thread_id):
     thread.save()
     thread = thread.to_dict()
     return JsonResponse({
-        'content': utils.safe_content(thread),
-        'ability': utils.get_ability(SlashSeparatedCourseKey.from_deprecated_string(course_id), thread, request.user),
+        'content': safe_content(thread),
+        'ability': get_ability(SlashSeparatedCourseKey.from_deprecated_string(course_id), thread, request.user),
     })
 
 
@@ -300,7 +304,7 @@ def delete_comment(request, course_id, comment_id):
     """
     comment = cc.Comment.find(comment_id)
     comment.delete()
-    return JsonResponse(utils.safe_content(comment.to_dict()))
+    return JsonResponse(safe_content(comment.to_dict()))
 
 
 @require_POST
@@ -313,7 +317,7 @@ def vote_for_comment(request, course_id, comment_id, value):
     user = cc.User.from_django_user(request.user)
     comment = cc.Comment.find(comment_id)
     user.vote(comment, value)
-    return JsonResponse(utils.safe_content(comment.to_dict()))
+    return JsonResponse(safe_content(comment.to_dict()))
 
 
 @require_POST
@@ -327,7 +331,7 @@ def undo_vote_for_comment(request, course_id, comment_id):
     user = cc.User.from_django_user(request.user)
     comment = cc.Comment.find(comment_id)
     user.unvote(comment)
-    return JsonResponse(utils.safe_content(comment.to_dict()))
+    return JsonResponse(safe_content(comment.to_dict()))
 
 
 @require_POST
@@ -341,7 +345,7 @@ def vote_for_thread(request, course_id, thread_id, value):
     user = cc.User.from_django_user(request.user)
     thread = cc.Thread.find(thread_id)
     user.vote(thread, value)
-    return JsonResponse(utils.safe_content(thread.to_dict()))
+    return JsonResponse(safe_content(thread.to_dict()))
 
 
 @require_POST
@@ -355,7 +359,7 @@ def flag_abuse_for_thread(request, course_id, thread_id):
     user = cc.User.from_django_user(request.user)
     thread = cc.Thread.find(thread_id)
     thread.flagAbuse(user, thread)
-    return JsonResponse(utils.safe_content(thread.to_dict()))
+    return JsonResponse(safe_content(thread.to_dict()))
 
 
 @require_POST
@@ -372,7 +376,7 @@ def un_flag_abuse_for_thread(request, course_id, thread_id):
     thread = cc.Thread.find(thread_id)
     remove_all = cached_has_permission(request.user, 'openclose_thread', course_id) or has_access(request.user, 'staff', course)
     thread.unFlagAbuse(user, thread, remove_all)
-    return JsonResponse(utils.safe_content(thread.to_dict()))
+    return JsonResponse(safe_content(thread.to_dict()))
 
 
 @require_POST
@@ -386,7 +390,7 @@ def flag_abuse_for_comment(request, course_id, comment_id):
     user = cc.User.from_django_user(request.user)
     comment = cc.Comment.find(comment_id)
     comment.flagAbuse(user, comment)
-    return JsonResponse(utils.safe_content(comment.to_dict()))
+    return JsonResponse(safe_content(comment.to_dict()))
 
 
 @require_POST
@@ -403,7 +407,7 @@ def un_flag_abuse_for_comment(request, course_id, comment_id):
     remove_all = cached_has_permission(request.user, 'openclose_thread', course_key) or has_access(request.user, 'staff', course)
     comment = cc.Comment.find(comment_id)
     comment.unFlagAbuse(user, comment, remove_all)
-    return JsonResponse(utils.safe_content(comment.to_dict()))
+    return JsonResponse(safe_content(comment.to_dict()))
 
 
 @require_POST
@@ -417,7 +421,7 @@ def undo_vote_for_thread(request, course_id, thread_id):
     user = cc.User.from_django_user(request.user)
     thread = cc.Thread.find(thread_id)
     user.unvote(thread)
-    return JsonResponse(utils.safe_content(thread.to_dict()))
+    return JsonResponse(safe_content(thread.to_dict()))
 
 
 @require_POST
@@ -431,7 +435,7 @@ def pin_thread(request, course_id, thread_id):
     user = cc.User.from_django_user(request.user)
     thread = cc.Thread.find(thread_id)
     thread.pin(user, thread_id)
-    return JsonResponse(utils.safe_content(thread.to_dict()))
+    return JsonResponse(safe_content(thread.to_dict()))
 
 
 @require_POST
@@ -445,7 +449,7 @@ def un_pin_thread(request, course_id, thread_id):
     user = cc.User.from_django_user(request.user)
     thread = cc.Thread.find(thread_id)
     thread.un_pin(user, thread_id)
-    return JsonResponse(utils.safe_content(thread.to_dict()))
+    return JsonResponse(safe_content(thread.to_dict()))
 
 
 @require_POST
@@ -598,3 +602,40 @@ def upload(request, course_id):  # ajax upload file to a question or answer
             'file_url': file_url,
         }
     })
+
+@require_GET
+@login_required
+def users(request, course_id):
+    """
+    Given a `username` query parameter, find matches for users in the forum for this course.
+
+    Only exact matches are supported here, so the length of the result set will either be 0 or 1.
+    """
+
+    course_key = SlashSeparatedCourseKey.from_deprecated_string(course_id)
+    try:
+        course = get_course_with_access(request.user, 'load_forum', course_key)
+    except Http404:
+        # course didn't exist, or requesting user does not have access to it.
+        return JsonError(status=404)
+
+    try:
+        username = request.GET['username']
+    except KeyError:
+        # 400 is default status for JsonError
+        return JsonError(["username parameter is required"])
+
+    user_objs = []
+    try:
+        matched_user = User.objects.get(username=username)
+        cc_user = cc.User.from_django_user(matched_user)
+        cc_user.course_id=course_key
+        cc_user.retrieve(complete=False)
+        if (cc_user['threads_count'] + cc_user['comments_count']) > 0:
+            user_objs.append({
+                'id': matched_user.id,
+                'username': matched_user.username,
+            })
+    except User.DoesNotExist:
+        pass
+    return JsonResponse({"users": user_objs})

lms/lib/comment_client/user.py

@@ -117,6 +117,7 @@ class User(models.Model):
     def _retrieve(self, *args, **kwargs):
         url = self.url(action='get', params=self.attributes)
         retrieve_params = self.default_retrieve_params
+        retrieve_params.update(kwargs)
         if self.attributes.get('course_id'):
             retrieve_params['course_id'] = self.course_id.to_deprecated_string()
         try: