urls: Simplify URL patterns for presence.

Extracting a section for presence endpoints and using path() rather
than re_path() results in a much cleaner implementation of this
concept.

This eliminates the last case where test_openapi couldn't correctly
match an endpoint documentation with the OpenAPI definitions for it.

zerver/tests/test_openapi.py

@@ -290,10 +290,6 @@ class OpenAPIArgumentsTest(ZulipTestCase):
         '/fetch_google_client_id',
         # API for video calls we're planning to remove/replace.
         '/calls/zoom/create',
-
-        #### Documented endpoints not properly detected by tooling.
-        # Regex with an unnamed capturing group.
-        '/users/(?!me/)(?P<email>[^/]*)/presence',
     }
 
     # Endpoints where the documentation is currently failing our

zproject/urls.py

@@ -138,19 +138,11 @@ v1_api_and_json_patterns = [
          {'GET': 'zerver.views.presence.get_statuses_for_realm'}),
 
     # users -> zerver.views.users
-    #
-    # Since some of these endpoints do something different if used on
-    # yourself with `/me` as the email, we need to make sure that we
-    # don't accidentally trigger these.  The cleanest way to do that
-    # is to add a regular expression assertion that it isn't `/me/`
-    # (or ends with `/me`, in the case of hitting the root URL).
     path('users', rest_dispatch,
          {'GET': 'zerver.views.users.get_members_backend',
           'POST': 'zerver.views.users.create_user_backend'}),
     path('users/<int:user_id>/reactivate', rest_dispatch,
          {'POST': 'zerver.views.users.reactivate_user_backend'}),
-    re_path(r'^users/(?!me/)(?P<email>[^/]*)/presence$', rest_dispatch,
-            {'GET': 'zerver.views.presence.get_presence_backend'}),
     path('users/<int:user_id>', rest_dispatch,
          {'GET': 'zerver.views.users.get_members_backend',
           'PATCH': 'zerver.views.users.update_user_backend',
@@ -273,8 +265,6 @@ v1_api_and_json_patterns = [
     path('users/me', rest_dispatch,
          {'GET': 'zerver.views.users.get_profile_backend',
           'DELETE': 'zerver.views.users.deactivate_user_own_backend'}),
-    path('users/me/presence', rest_dispatch,
-         {'POST': 'zerver.views.presence.update_active_status_backend'}),
     path('users/me/status', rest_dispatch,
          {'POST': 'zerver.views.presence.update_user_status_backend'}),
     # Endpoint used by mobile devices to register their push
@@ -286,6 +276,15 @@ v1_api_and_json_patterns = [
          {'POST': 'zerver.views.push_notifications.add_android_reg_id',
           'DELETE': 'zerver.views.push_notifications.remove_android_reg_id'}),
 
+    # users/*/presnece => zerver.views.presence.
+    path('users/me/presence', rest_dispatch,
+         {'POST': 'zerver.views.presence.update_active_status_backend'}),
+    # It's important that this sit after users/me/presence so that
+    # Django's URL resolution order doesn't break the
+    # /users/me/presence endpoint.
+    path(r'users/<str:email>/presence', rest_dispatch,
+         {'GET': 'zerver.views.presence.get_presence_backend'}),
+
     # user_groups -> zerver.views.user_groups
     path('user_groups', rest_dispatch,
          {'GET': 'zerver.views.user_groups.get_user_group'}),