The upload option will no longer be limited to strictly S3 uploads. This
commit serves as a preliminary step for supporting LOCAL_UPLOADS_DIR as
part of the public only export feature.
We've been seeing nondeterministic failures in this test suite in CI
that we can't reproduce locally; these print statements should help
track them down.
This is the only function in TestEmailMirrorLibrary, so we rename this
class to more appropriate TestGetMissedMessageToken, clean it up a bit
and add some extra checks to finally get email_mirror.py to 100% test
coverage.
log_and_report and its helper functions were mostly old code no longer
well adapted to how email mirror works currently, as well as having no
test coverage. We rewrite this part of the email to report errors in a
similar manner, and add tests for it. We're able to get rid of the
clunky and now useless debug_info dictionary in process message, as
log_and_report only needs the recipient email in its third argument.
The only place in which process_stream_message used debug_info was to
set the 'stream' key, which would only be used if ZulipEmailForwardError
was raised after this line in the code - which is impossible, because after
that line only send_zulip (which doesnt raise this exception) and
logger.info get called, then process_stream_message successfully returns
and then process_message succesfully returns as well. So this debug_info
code wasn't doing anything. We remove it.
Mostly rewritten by Tim Abbott to ensure it correctly implements the
desired security model.
Administrators should have access to users' real email address so that
they can contact users out-of-band.
Clients won't have access to user email addresses, and thus won't be
able to compute gravatars.
The tests for this are a bit messy, in large part because our tests
for get_events call subsections of it, rather than the main function.
This provides a clean warning and 40x error, rather than a 500, for
this corner case which is very likely user error.
The test here is awkward because we have to work around
https://github.com/zulip/zulip/issues/12362.
The `LocalUploadBackend` returns a relative URL, while the `S3UploadBackend`
returns an absolute URL. This commit switches to using `urljoin` to obtain the
absolute URL, instead of simply joining strings.
This commit also adds a small functionality change where the results of
each webhook fixture message sent is now displayed to the user.
With a small tweak by tabbott to fix a styling bug.
Fixes#12122.
Note: If you're going to send fixtures which are not JSON or of the
text/plain content type, make sure you set the correct content type
in the custom headers.
E.g. For the wordpress fixtures the "Content-Type" should be set to
"application/x-www-form-urlencoded".
This is a very old commit for #106, which has been on hiatus for a few
years. It was significantly modified by tabbott to:
* Improve coding style and variable names
* Update mypy annotations style
* Clean up the testing logic
* Update for API changes elsewhere in our system
But the actual runtime code is essentially unmodified from the
original work by Kirill.
It contains basic support for archiving Messages, UserMessages, and
Attachments with a nice test suite. It's still not usable in
production (e.g. it will probably break Reactions, SubMessages, etc.),
but upcoming commits will address that.
This is handy for code that needs to do something with the sent
message. We need it for a retention policy code path, but it seems
likely we'll use it a lot down the line.
This commit introduces a simple field where the user can now specify custom
HTTP headers. This commit does not introduce an improved system for storing
HTTP headers as fixtures - such a change would modify both the existing unit
tests as well as this devtool.
This commit adds a new developer tool: The "integrations dev panel"
which will serve as a replacement for the send_webhook_fixture_message
management command as a way to test integrations with much greater ease.
This lets us handle directly in our tooling the user experience that
we document for exporting a realm with member consent (before, it
required unpleasant manual work).
Added a new button at the bottom of the stream list which redirects
users to '/#streams/all' where they can create new streams or subscribe
to new streams.
The button is not visible to guests.
Fixes#11642.
We may be successfully able to get the page once, to get the content type, but
the server or network may go down and cause problems when fetching the page for
parsing its meta tags.
Currently, we only show previews for URLs which are HTML pages, which could
contain other media. We don't show previews for links to non-HTML pages, like
pdf documents or audio/video files. To verify that the URL posted is an HTML
page, we verify the content-type of the page, either using server headers or by
sniffing the content.
Closes#8358
We had some excessively tight rules about what characters were
allowed, which in particular prevented using `?foo=bar&baz=quux`
structures in the realm filters URLs.
Fixes#12239.
We had a report in the thread around
https://chat.zulip.org/#narrow/stream/31-production-help/topic/Apache-based.20SSO/near/741013
that confirmation links were taking the user to the /register form on
the Apache server, which of course doesn't work because the Apache
server architecture we have is intended to only serve a single
endpoint, /accounts/login/sso, and not any static assets (etc.).
This manifested as users getting a broke page with a bunch of JS
errors about missing static assets when trying to sign up for an
account. The right fix is to ensure that we serve these confirmation
links (and maybe in the future, redirects) to the nginx server.
`youtube.com/playlist?list=<list-id>` incorrectly matches the regex since the
change in 8afda1c1bb. The regex was modified to
match URLs of the form `youtu.be/<id>` and this playlist URL incorrectly matches
with the `<id>` set to `playlist`.
This commit avoids this match by verifying that the ID is not playlist.
This renames Subscription.in_home_view field to is_muted, for greater
clarity as to what it does just from seeing the setting name, without
having to look it up.
Also disabled an obsolete test_migrations test.
Fixes#10042.
These tests have some code and comments that only used to apply when
these empty body scenarios used to raise the regular
ZulipEmailForwardError - now they raise ZulipEmailForwardUserError.
We adapt the tests to this fact and test by mocking logging.warning and
making sure it gets called with the intended warning message. This is
also needed to cover the ZulipEmailForwardUserError case with tests to
get to 100% coverage of email_mirror.py.
We add a test for the case "if not all(val is not None for val in result):"
on result returned by redis_client.hmget in send_to_missed_message_address.
A couple of tests asserted that the number of queries were within a range,
because they ran one additional query when they were run individually, as
compared to running all the tests in `TestDigestEmailMessages`. We now trigger
these additional queries within the tests, to make the tests deterministic and
assert that the number of queries is a number, instead of a range.
Digest emails were disabled for soft deactivated users, since UserMessage
objects are created for such users lazily when they return.
We now compute the message list for gathering hot conversations by looking at
all the messages sent to the streams where the user is subscribed, while they
were subscribed.
Fixes#6297
If the text part of an email message didn't specify the charset in the
Content-Type header, the text content wouldn't be found. We fix this, by
assuming us-ascii charset in those cases, as specified by RFC6657:
https://tools.ietf.org/html/rfc6657
This commit migrates the Subscription's notification fields from a
BooleanField to a NullBooleanField where a value of None means to
inherit the value from user's profile.
Also includes a migrations to set the corresponding settings to None
if they match the user profile's values. This migration helps us in
getting rid of the weird "Apply to all" widget that we offered on
subscription settings page.
The mobile apps can't handle None appearing as the stream-level
notification settings, so for backwards-compatibility we arrange to
only send True/False to the mobile apps by applying those defaults
server-side. We introduce a notification_settings_null value within a
client_capabilities structure that newer versions of the mobile apps
can use to request the new model.
This mobile compatibility code is pretty effectively tested by the
existing test_events tests for the subscriptions subsystem.
If MAX_FILE_UPLOAD_SIZE is set to 0, then UI elements like the upload
icon in the compose and message edit UI and "Attachments" menu in
"/#settings" are not displayed.
A different error message is also displayed if a user tries to drag and
drop or paste a file into the compose message box.
Fixes#12152.
Currently there's no way to tell the difference between "a server admin
deactivated a realm due to it being spammy" vs "a realm admin deactivated
the realm".
Due to my misreading the code and a sloppy search, I thought in
8218bf101c that
all_stream_subscription_logs didn't filter for streams.
While changing this, we'll switch to using `.modified_stream_id` for
potentially better performance.
Fixes#12273.
When running the test_query_email_attr test in reverse, the test failed
because self._LDAPUser.attrs was being modified and it was being shared
with other tests.
This commit also removes the conditional for when a build status
does not have a corresponding emoji. In such a case, it is better
to have no emoji than displaying some boilerplate text about no
appropriate emoji being available.
This makes the implementation of `get_realm` consistent with its
declared return type of `Realm` rather than `Optional[Realm]`.
Fixes#12263.
Signed-off-by: Anders Kaseorg <anders@zulipchat.com>
This commit replaces the `create_stream_by_admins_only` setting with a
new `create_stream_policy` setting, which mirroring the structure of
the existing `invite_to_stream_policy`.
This is important preparation for migrating the waiting period feature
to be its own independent setting.
Fixes#12236.
Running the backend tests with a high number of processes can cause
unexpected errors with language changes. When certain tests that change
the default language, (without explicitly overriding the teardown method
to reset the default language), interleave with other tests that are
expecting the language to be in English, discrepancies arise.
This fixes a common nondeterministic test failure with high levels of
parallelization.
If a soft deactivated user had a subscription double-toggled without
any new messages being sent in between, add_missing_messages might
incorrectly process those two subscription changes in the wrong order.
Fortunately, the failure mode was usually to throw this exception:
django.db.utils.IntegrityError: duplicate key value violates unique
constraint "zerver_usermessage_user_profile_id_message_id_4936d0df_uniq"
DETAIL: Key (user_profile_id, message_id)=(4, 57) already exists.
Our unit tests actually had this precise setup some fraction of the
time, because a bit of the test setup code subscribed+unsubscribed the
target user without sending any messages in between, resulting in a
test failure something like 50% of the time.
The original exception was hard to reproduce reliably originally
(resulting in an extremely annoying nondetermnistic test failure), but
is easily reproducible by changing the "id" to "-id" in this change to
always mis-order the processing of those RealmAuditLog events.
Previously, our soft-deactivation logic incorrectly did not filter the
set of stream subscription changes to look at to only include the
target stream.
This could result in unspecified buggy behavior.
Break will do the same thing as continue here, as each iteration will
have the same result, and it's also worth explaining why this isn't
one layer up in the loop setup.
Using sys.exit in a management command makes it impossible
to unit test the code in question. The correct approach to do the same
thing in Django management commands is to raise CommandError.
Followup of b570c0dafa
We should definitely be starting each test case with an empty copy of
the per-request caches, since their intended duration is even shorter
than a request.
This was masked by the fact that these caches are automatically
flushed when one makes an actual request to the Zulip API; so the
problems were only manifesting in tests like test_events, where we
call lower-level functions that access a per-request cache without
using the Zulip API.
The make_import_output_dir helper function used a path determined
primarily by the filename of the fixture being used, and expected to
have complete control over that path for the duration of the test.
This resulted in nondeterministic errors if our two test classes that
ran Mattermost import code ran at the same time.
Fixes#12251.
Previously when disabling name changes in server settings, instead
of realm settings, the name edit button did not get disabled.
Changing name resulted in a message stating `no changes made`.
Fixes#12132.
Realm setting to disable avatar changes is already present.
The `AVATAR_CHANGES_DISABLED` setting now follows the same
2-setting model as `NAME_CHANGES_DISABLED`.
This is useful when syncing avatars from an integrated LDAP/active
directory.
The upload avatar and delete avatar buttons are hidden if avatar
changes are disabled and the user is a non-admin.
If the user has a gravatar set, then the user will not be able to
upload an image as their avatar if avatar changes are disabled.
Part of #12132.
This module is used to render the HTML of pages like our user documentation
into text for use in open graph previews of those articles. It provided somewhat
confusing output in the case that there were paragraph breaks in the original message,
because text with multiple paragraphs and list items does't read very well. This commit
adds `|` as a delimiter between paragraphs, and prefixes list items with a `*`.
Closes#12228
When an emoji is nested inside another inline tag - like em or strong -
it was getting double processed because of the way the inlinePattern
TreeProcessor runs (it runs recursively). With this fix, we set the
inner text of the emoji span as an AtomicString, preventing us from
double processing the emoji's text.
Fixes#11621
Test Plan:
* Add test case for **😄**, verify it passes.
* Go into local dev server and send "**😄**" to self and verify the DOM
does not have double <span> tags for the emoji.
* Run zerver.tests.test_push_notifications and verify the markdown test case matches
the text_content field properly
comment_created payloads may not contain the required issue data
to format a useful notification, therefore, it is better to handle
issue comments through issue_updated events (which we already do).
Fixes: #11995.
We create rate_limit_entity as a general rate-limiting function for
RateLimitedObjects, from code that was possible to abstract away from
rate_limit_user and that will be used for other kinds of rate limiting.
We make rate_limit_user use this new general framework from now.
This enables the function to either return a valid UserProfile or raise
InvalidMirrorInput, which is clearer and more pythonic than the previous
approach of a tuple of a bool and Optional[UserProfile].
In making the type clearer, this improves checking with mypy.
Tests updated.
This commit creates a new organization setting that determines whether
a user can invite other users to streams. Previously this was linked
to the waiting period threshold, but this was both not documented and
overly limiting.
With significant tweaks by tabbott to change the database model to not
involve two threshhold fields, edit the tests, etc.
This requires follow-up work to make the create stream policy setting
work how this code implies it should.
Fixes#12042.
Allow realms to specify the day of the week when the digest should be sent out.
When enqueue-ing digests, pick only the realms that chose the current weekday as
the day to send out digests.
The github-services model for how GitHub would send requests to this
legacy integration is no longer available since earlier in 2019.
Removing this integration also allows us to finally remove
authenticated_api_view, the legacy authentication model from 2013 that
had been used for this integration (and other features long since
upgraded).
A few functions that were used by the Beanstalk webhook are moved into
that webhook's implementation directly.
An endpoint was created in zerver/views. Basic rate-limiting was
implemented using RealmAuditLog. The idea here is to simply log each
export event as a realm_exported event. The number of events
occurring in the time delta is checked to ensure that the weekly
limit is not exceeded.
The event is published to the 'deferred_work' queue processor to
prevent the export process from being killed after 60s.
Upon completion of the export the realm admin(s) are notified.
This slows down the tests by about 5-10% -- the tests go from 0.6s to 0.630s or
so. But, this seems like a change worth making to prevent open-graph metadata
breaking HTML.
The entire idea of doing this operation with unchecked string
replacement in a middleware class is in my opinion extremely
ill-conceived, but this fixes the most pressing problem with it
generating invalid HTML.
Signed-off-by: Anders Kaseorg <anders@zulipchat.com>
The initial goal was to improve message formatting and punctuation
but after a closer look, I realized that a larger refactor was
worth it for clarity and redability.
This reverts commit fd9dd51d16 (#1815).
The issue described does not exist in Python 3, where urllib.parse now
_only_ accepts (Unicode) str and does the right thing with it. The
workaround was not being triggered and would have failed if it were.
Signed-off-by: Anders Kaseorg <anders@zulipchat.com>
This contains email of the user to whom notification is being
send. This has not been used in any past mobile releases, so it is
safe to remove it.
As user_id will be stable for the user, but not email. So it's better to
start consuming `user_id` instead of email on mobile.
Calls to `render_markdown_path` weren't getting cached since the context
argument is unhashable, and the `ignore_unhashable_lru_cache` decorator ignores
such calls. This commit adds a couple of more decorators - one which converts
dict arguments to the function to a dict items tuple, and another which converts
dict items tuple arguments back to dicts. These two decorators used along with
the `ignore_unhashable_lru_cache` decorator ensure that the calls to
`render_markdown_path` with the context dict argument are also cached.
The time to run zerver.tests.test_urls.PublicURLTest.test_public_urls drops by
about 50% from 8.4s to 4.1s with this commit. The time to run
zerver.tests.test_docs.DocPageTest.test_doc_endpoints drops by about 20% from
3.2s to 2.5s.
This fixes an issue where the hanging unordered list was not
rendering in blockquote; the problem was that we were not
adding an empty line(to satisfy the markdown) for hanging
unordered list if it is in blockquote. Both blockquote
and code block is fenced but we want to avoid rendering
the list if it's in the code block but not in blockquote.
Fixes: #11916.
This commit serves as the first step in supporting "public export" as a
webapp feature. The refactoring was done as a means to allow calling
the export logic from elsewhere in the codebase.
This is important because upcoming features will include slightly more
complex logic in post_process_state that we'd ideally like to be
included in what this suite tests.
This requires a few related changes:
* A small change to post_process_state to sort the realm_users objects
by user_id to ensure those data structures are stable.
* Improvements to the logic for checking if the initial state has
changed to use match_states for better output.
Extend the list of users that have to be notified when a message is
changed, so that in addition to users who have a UserMessage row, any
users who subscribed later to a stream with history public to
subscribers will also get the update.
Fixes: #8750.
This adds experimental support in /register for sending key
statistical data on the last 1000 private messages that the user is a
participant in. Because it's experimental, we require developers to
request it explicitly in production (we don't use these data yet in
the webapp, and it likely carries some perf cost).
We expect this to be extremely helpful in initializing the mobile app
user experience for showing recent private message conversations.
See the code comments, but this has been heavily optimized to be very
efficient and do all the filtering work at the database layer so that
we minimize network transit with the database.
Fixes#11944.
Certain payloads for account updates do not include the
previous_attributes that allow us to figure out what was actually
updated. So, we just ignore just payloads.
This is in response to a support ticket where the user had a closed left
sidebar, had added an organization, and then couldn't figure out how to
switch organizations. They had googled and found "The desktop app makes it
easy to switch between different organizations" in our help docs, which was
not sufficiently helpful.
Previously, we had some expensive-to-calculate keys in
zulip_default_context, especially around enabled authentication
backends, which in total were a significant contributor to the
performance of various logged-out pages. Now, these keys are only
computed for the login/registration pages where they are needed.
This is a moderate performance optimization for the loading time of
many logged-out pages.
Closes#11929.
Previously, we could 500 if an organization administrator scanned
possible PreregistrationUser IDs looking for a valid invitation they
can interact with.
They couldn't do anything, so no security issue, but this fixes that
case to just be a 400 error as it should be.
With the previous commit, fixes#1836.
As specified in the issue above, we make
get_email_gateway_message_string_from_address raise an exception if
it doesn't recognise the email gateway address pattern. Then, we make
appropriate adjustments in the codepaths which call this function.
These functions don't really belong in actions.py, so we move them out,
into email_mirror_helpers.py. They can't go directly into
email_mirror.py or we'd get circular imports resulting in ImportError.
The hope is that by having a shorter list of initial streams, it'll
avoid some potential confusion confusion about the value of topics.
At the very least, having 5 streams each with 1 topic was not a good
way to introduce Zulip.
This commit minimizes changes to the message content in
`send_initial_realm_messages` to keep the diff readable. Future commits will
reshape the content.
There were several problems with the old format:
* The sender was not necessarily the sender; it was the person who did
the deletion (which could be an organization administrator)
* It didn't include the ID of the sender, just the email address.
* It didn't include the recipient ID, instead having a semi-malformed
recipient_type_id under the weird name recipient_user_ids.
Since nothing was relying on the old behavior, we can just fix the
event structure.
We change the send_to_email_mirror management command, to send messages
to the email mirror through the mirror_email_message function instead of
process_message - this makes the message follow a similar codepath as
emails sent into the mirror with the postfix configuration, which means
going through the MirrorWorker queue. The reason for this is to make
this command useful for testing the new email mirror rate limiter.
Closes#2420
We add rate limiting (max X emails withing Y seconds per realm) to the
email mirror. By creating RateLimitedRealmMirror class, inheriting from
RateLimitedObject, and rate_limit_mirror_by_realm function, following a
mechanism used by rate_limit_user, we're able to have this
implementation mostly rely on the already existing, and proven over
time, rate_limiter.py code. The rules are configurable in settings.py in
RATE_LIMITING_MIRROR_REALM_RULES, analogically to RATE_LIMITING_RULES.
Rate limit verification happens in the MirrorWorker in
queue_processors.py. We don't rate limit missed message emails, as due
to using one time addresses, they're not a spam threat.
test_mirror_worker is adapted to the altered MirrorWorker code and a new
test - test_mirror_worker_rate_limiting is added in test_queue_worker.py
to provide coverage for these changes.
We clean up test_mirror_worker for more readability, as well as make it
verify that mirror_email gets called the correct amount of times and use
a correct rcpt_to address, so that the test doesn't fail when some
verification of the address is added in the following commits
implementing rate limiting in the email mirror.
Fixes#9840.
Old addresses caused bugs in some cases with non-latin characters in
stream names (see issue number above). We switch to using django's
slugify helper function to convert stream names to full ascii, while
also getting rid of problematic non-alphanumeric characters, in a
reasonable way. See Django's documentation for slugify to see more about
how this function works.
Tests extended by tabbott to cover cases where we do end up with ascii.
To prepare for changing how the stream name gets encoded into mirror
email addresses while making sure old addresses keep working, we ignore
the stream_name part when receiving emails into the mirror and we only
look at the email_token to identify into which stream to mirror the
email.
I'm surprised that this wasn't a mypy error; we were passing a Realm
object as an integer, and predictably, this resulted in us
constructing a cache key that looked like this:
stream_by_realm_and_name:<Realm: zulip 1>:dd5...
Previously, these cache keys looked like:
:1:9c26164d3a393e316e0f8210efe270e08710d45astream_by_realm_and_name:...
Now, they look like this:
:1:9c26164d3a393e316e0f8210efe270e08710d45a:stream_by_realm_and_name:...
This avoids a bunch of duplicated calls to auth_enabled_helper for our
social auth backends, which added up because auth_enabled_helper can
take 100us to run.
See the comment, but this is a significant performance optimization
for all of our pages using common_context, because this code path is
called more than a dozen times (recursively) by common_context.
We have a few code paths that call get_realm_from_request multiple
times on the same request (e.g. the login page), once inside the view
function and once inside the common context processor code. This
change saves a useless duplicate database query in those code paths.
This block of code with 2 database queries is solely for the /devlogin
endpoint. Removing that block from the /login code path makes it
easier to test /login perf in development.
We never intended to render them for this use case as the result would
not look good, and now we have a convenient bugdown option for
controlling this behavior.
Since we're not storing the markdown rendering anywhere, there's
conveniently no data migration required.
Fixes#11889.
This renames references to user avatars, bot avatars, or organization
icons to profile pictures. The string in the UI are updated,
in addition to the help files, comments, and documentation. Actual
variable/function names, changelog entries, routes, and s3 buckets are
left as-is in order to avoid introducing bugs.
Fixes#11824.
Follow up on 92dc363. This modifies the ScheduledEmail model
and send_future_email to properly support multiple recipients.
Tweaked by tabbott to add some useful explanatory comments and fix
issues with the migration.
Apparently, our invalid realm error page had HTTP status 200, which
could be confusing and in particular broken our mobile app's error
handling for this case.
When soft deactivation is run for in "auto" mode (no emails are
specified and all users inactive for specified number of days are
deactivated), catch-up is also run in the "auto" mode if
AUTO_CATCH_UP_SOFT_DEACTIVATED_USERS is True.
Automatically catching up soft-deactivated users periodically would
ensure a good user experience for returning users, but on some servers
we may want to turn off this option to save on some disk space.
Fixes#8858, at least for the default configuration, by eliminating
the situation where there are a very large number of messages to recover.
A user who has been soft deactivated for a long time might have 10Ks of message
history that was "soft deactivated". It might take a minute or more to add
UserMessage rows for all of these messages, causing timeouts. So, we paginate
the creation of these UserMessage rows.
This logic for passing through whether the user was logged in never
worked, because we were trying to read the client.
Fix this, and add tests to ensure it never breaks again.
Restructured by tabbott to have completely different code with the
same intent.
Fixes#11802.
Previously, the LDAP authentication model ignored the realm-level
settings for who can join a realm. This was sort of reasonable at the
time, because the original LDAP auth was an SSO solution that didn't
allow multiple realms, and so one could fully configure authentication
settings on the LDAP side. But now that we allow multiple realms with
the LDAP backend, one could easily imagine wanting different
restrictions on them, and so it makes sense to add this enforcement.
This field is primarily intended to support avoiding displaying the
"more topics" feature in new organizations and streams, where we might
know that all messages in the stream are already available in the
browser.
Based on original work by Roman Godov, and significantly modified by
tabbott.
The second migration involved here could be expensive on Zulip Cloud,
but is unlikely to be an issue on other servers.
The actual bug in #11791 was caused by code reverted in
3ed85f4cd7, so technically #11791 is
already fixed. However, it makes sense to add tests to ensure that it
doesn't regress in the future as part of closing out the issue.
Fixes#11791.
Apparently, our new validator for stream color having a valid format
incorrectly handled colors that had duplicate characters in them.
(This is caused in part by the spectrum.js logic automatically
converting #ffff00 to #ff0, which our validator rejected). Given that
we had old stream colors in the #ff0 format in our database anyway for
legacy, there's no benefit to banning these colors.
In the future, we could imagine standardizing the format, but doing so
will require also changing the frontend to submit colors only in the
6-character format.
Fixes an issue reported in
https://github.com/zulip/zulip/issues/11845#issuecomment-471417073
According to GitHub's webhook docs, the scope of a membership
event can only be limited to 'teams', which holds true when a
new member is added to a team. However, we just found a payload
in our logs that indicates that when a user is removed from a
team, the scope of the membership is erroneously set to
'organization', not 'team'. This is most likely a bug on
GitHub's end because such behaviour is a direct violation of
their webhook API event specifications. We account for this
by restricting membership events to teams explicitly, at least
till GitHub's docs suggest otherwise.