This commit allows us to type # in the UI and present autocomplete
results immediately with the following logic for the topic composer,
and reversed for the chat composer:
* Categories the user can access and has not muted sorted by `topic_count`
* Tags the user can access and has not muted sorted by `topic_count`
* Chat channels the user is a member of sorted by `messages_count`
So in effect, we allow searching for hashtags without a search term.
To do this we add a new `search_without_term` to each data source so
each one can define how it wants to handle this logic.
When looking up hashtags which were conflicting (e.g.
management::tag and management) where the user did
not have permission for one of them, we ended up returning
the one they did have permission to (e.g. the tag) twice
because of the way the lookup fallback code worked. This
fixes the issue, and another related one where the
::type was not added to the found item's .ref, and
so the hashtag replacement on the client was not working
correctly.
* FIX: Save only visible fields from the sidebar page
* FIX: Do not reset seen popups when set to false
If the option was unchecked, but it was not changed at all by the user
it was still sent to the server as a 'false' value which reset all seen
popups. This removes that behavior and resetting the list of seen popups
must be done using the "skip new user tips" button.
The centralization helps in reducing code duplication in our code base
and more importantly, centralizing logic for guardian checks into a
single spot.
This commit introduce a new API for registering callbacks, which we'll execute when a user gets destroyed, and the `delete_posts` opt is true. The chat plugin registers one callback and queues a job to destroy every message from that user in batches.
When searching for categories it is possible for
a child category to have a slug that matches the term
exactly, but will not be found by .lookup since we
don't return these categories unless the ref matches
parent:child.
Introduces a search_sort method to each hashtag data
source so they can provide their custom sort logic of
results, in category's case putting all matching slugs
to the top regardless of parent/child relationship
then sorting by text.
This changes the hashtag search to first do a lookup to find
results where the slug exactly matches the
search term. Now when we search for hashtags, the
exact matches will be found first and put at the top of
the results.
`ChatChannelFetcher` has also been modified here to allow
for more options for performance -- we do not need to
query DM channels for secured IDs when looking up or searching
channels for hashtags, since they should never show in
results there (they have no slugs). Nor do we need to include
the channel archive records.
Also changes the limit of hashtag results to 20 by default
with a hidden site setting, and makes it so the scroll for the
results is overflowed.
Adds the description as a title="" attribute on the hashtag
autocomplete search items for tags, categories, and channels.
These descriptions can be seen by the user since they are
able to see the results that are returned by the search via
Guardian checks.
The user attributes are not updated between clients and that is a
problem with user tips because the same user tip will be displayed
multiple times, once for every client.
The tag ordering was inconsistent, because we were not
passing the correct order option to DiscourseTagging.filter_allowed_tags.
The order would change based on the limit provided. Now,
we can have a consistent order which is term exact match -> topic count ->
name.
This commit fleshes out and adds functionality for the new `#hashtag` search and
lookup system, still hidden behind the `enable_experimental_hashtag_autocomplete`
feature flag.
**Serverside**
We have two plugin API registration methods that are used to define data sources
(`register_hashtag_data_source`) and hashtag result type priorities depending on
the context (`register_hashtag_type_in_context`). Reading the comments in plugin.rb
should make it clear what these are doing. Reading the `HashtagAutocompleteService`
in full will likely help a lot as well.
Each data source is responsible for providing its own **lookup** and **search**
method that returns hashtag results based on the arguments provided. For example,
the category hashtag data source has to take into account parent categories and
how they relate, and each data source has to define their own icon to use for the
hashtag, and so on.
The `Site` serializer has two new attributes that source data from `HashtagAutocompleteService`.
There is `hashtag_icons` that is just a simple array of all the different icons that
can be used for allowlisting in our markdown pipeline, and there is `hashtag_context_configurations`
that is used to store the type priority orders for each registered context.
When sending emails, we cannot render the SVG icons for hashtags, so
we need to change the HTML hashtags to the normal `#hashtag` text.
**Markdown**
The `hashtag-autocomplete.js` file is where I have added the new `hashtag-autocomplete`
markdown rule, and like all of our rules this is used to cook the raw text on both the clientside
and on the serverside using MiniRacer. Only on the server side do we actually reach out to
the database with the `hashtagLookup` function, on the clientside we just render a plainer
version of the hashtag HTML. Only in the composer preview do we do further lookups based
on this.
This rule is the first one (that I can find) that uses the `currentUser` based on a passed
in `user_id` for guardian checks in markdown rendering code. This is the `last_editor_id`
for both the post and chat message. In some cases we need to cook without a user present,
so the `Discourse.system_user` is used in this case.
**Chat Channels**
This also contains the changes required for chat so that chat channels can be used
as a data source for hashtag searches and lookups. This data source will only be
used when `enable_experimental_hashtag_autocomplete` is `true`, so we don't have
to worry about channel results suddenly turning up.
------
**Known Rough Edges**
- Onebox excerpts will not render the icon svg/use tags, I plan to address that in a follow up PR
- Selecting a hashtag + pressing the Quote button will result in weird behaviour, I plan to address that in a follow up PR
- Mixed hashtag contexts for hashtags without a type suffix will not work correctly, e.g. #ux which is both a category and a channel slug will resolve to a category when used inside a post or within a [chat] transcript in that post. Users can get around this manually by adding the correct suffix, for example ::channel. We may get to this at some point in future
- Icons will not show for the hashtags in emails since SVG support is so terrible in email (this is not likely to be resolved, but still noting for posterity)
- Additional refinements and review fixes wil
* FEATURE: API to update user's discourse connect external id
This adds a special handling of updates to DiscourseConnect external_id
in the general user update API endpoint.
Admins can create, update or delete a user SingleSignOn record using
PUT /u/:username.json
{
"external_ids": {
"discourse_connect": "new-external-id"
}
}
The problem was reported as a problem with changing theme in user preferences, after saving a new theme the previously set user status was disappearing (https://meta.discourse.org/t/user-status/240335/42). Turned out though that the problem was more wide, changing pretty much any setting in user preferences apart from user status itself led to clearing the status.
The previous sidebar default tags and categories implementation did not
allow for a user to configure their sidebar to have no categories or
tags. This commit changes how the defaults are applied. When a user is being created,
we create the SidebarSectionLink records based on the `default_sidebar_categories` and
`default_sidebar_tags` site settings. SidebarSectionLink records are
only created for categories and tags which the user has visibility on at
the point of user creation.
With this change, we're also adding the ability for admins to apply
changes to the `default_sidebar_categories` and `default_sidebar_tags`
site settings historically when changing their site setting. When a new
category/tag has been added to the default, the new category/tag will be
added to the sidebar for all users if the admin elects to apply the changes historically.
Like wise when a tag/category is removed, the tag/category will be
removed from the sidebar for all users if the admin elects to apply the
changes historically.
Internal Ref: /t/73500
Related to aeee7ed.
Before the change in aeee7ed, notifications for direct replies to your posts and notifications for replies in watched topics looked the same in the notifications menu -- they both used the arrow icon.
We decided in aeee7ed to distinguish them by changing "watched topics" notifications to use the bell icon because it was confusing for users who watch topics to see the same icon for direct replies and "watched topics". However, that change also means that non-power/new users who receive replies to topics _they create_ will get notifications with the bell icon because technically they're watching the topic, but the arrow icon is more appropriate for this case because we use it throughout the app to indicate "replies".
This commit adds a special-case so that if a user is watching a topic AND the topic is created by them, they receive notifications with the arrow icon (type `replied`) instead of the bell icon (type `posted`) for new posts in the topic.
Internal topic: t/79051.
Adds sorting for the HashtagAutocompleteService to
sort the results by case-insensitive text _within_
the type sort order specified by the params. This
should fix some flaky specs as well.
This commit adds a new `/hashtag/search` endpoint and both
relevant JS and ruby plugin APIs to handle plugins adding their
own data sources and priority orders for types of things to search
when `#` is pressed.
A `context` param is added to `setupHashtagAutocomplete` which
a corresponding chat PR https://github.com/discourse/discourse-chat/pull/1302
will now use.
The UI calls `registerHashtagSearchParam` for each context that will
require a `#` search (e.g. the topic composer), for each type of record that
the context needs to search for, as well as a priority order for that type. Core
uses this call to add the `category` and `tag` data sources to the topic composer.
The `register_hashtag_data_source` ruby plugin API call is for plugins to
add a new data source for the hashtag searching endpoint, e.g. discourse-chat
may add a `channel` data source.
This functionality is hidden behind the `enable_experimental_hashtag_autocomplete`
flag, except for the change to `setupHashtagAutocomplete` since only core and
discourse-chat are using that function. Note this PR does **not** include required
changes for hashtag lookup or new styling.
This commit introduces a new framework for building user tutorials as
popups using the Tippy JS library. Currently, the new framework is used
to replace the old notification spotlight and tips and show a new one
related to the topic timeline.
All popups follow the same structure and have a title, a description and
two buttons for either dismissing just the current tip or all of them
at once.
The state of all seen popups is stored in a user option. Updating
skip_new_user_tips will automatically update the list of seen popups
accordingly.
`delete_previous!` deletes existing topics even when we cannot send a new one due to the `limit_once_per` option. The dashboard problems PM gets deleted the next time the job runs (30 minutes), so the inbox could be empty when
admins click on the summary notification.
A user could receive more than a notification for the same post if they
watched both the categories and tags at different levels. This commit
makes sure that only the watching notification is created.
* Add DiscourseEvent before post notifications are created
If a user was granted a trust level, joined a group that granted a trust
level and left the group, the trust level was reset. This commit tries
to restore the last known trust level before joining the group by
looking into staff logs.
This commit also migrates old :change_trust_level user history records
to use previous_value and new_value fields.
The logic to determine what post excerpt to show for
a topic-level bookmark based on the last unread post
was complex and slow, so we decided to remove it and
always just use the first post excerpt.
This commit also fixes an issue where a couple of
instances of for_topic were missed when doing the
Bookmarkable refactors, so:
1. Clicking the topic bookmark link was not taking
the user to the last unread post
2. When replying to a topic where there was a topic
level bookmark with the auto delete preference
of "on owner reply", we were not removing the
bookmark from the UI correctly.
A test has been added for the former, the latter would
be quite time-consuming to test and not really worth
it considering it's quite an edge case UI bug.
Previously, for every bookmarked topic, all topic_user records were being preloaded. Only the current user's record is actually required.
This commit introduces a new `perform_custom_preload!` API which bookmarkables can use to add custom preloading logic. We use this in topic_bookmarkable to load just the topic_user data we need (in the same way as `topic_list.rb`).
Co-authored-by: Blake Erickson <o.blakeerickson@gmail.com>
862007fb18 introduced a change to the format that watched words are cached in Redis. Newly-deployed versions of the app were attempting to load the old-format data from Redis, leading to a server error. This commit introduces a CACHE_VERSION constant which we can easily bump when making changes to the cache schema.
* FEATURE: Add case-sensitivity flag to watched_words
Currently, all watched words are matched case-insensitively. This flag
allows a watched word to be flagged for case-sensitive matching.
To allow allow for backwards compatibility the flag is set to false by
default.
* FEATURE: Support case-sensitive creation of Watched Words via API
Extend admin creation and upload of Watched Words to support case
sensitive flag. This lays the ground work for supporting
case-insensitive matching of Watched Words.
Support for an extra column has also been introduced for the Watched
Words upload CSV file. The new column structure is as follows:
word,replacement,case_sentive
* FEATURE: Enable case-sensitive matching of Watched Words
WordWatcher's word_matcher_regexp now returns a list of regular
expressions instead of one case-insensitive regular expression.
With the ability to flag a Watched Word as case-sensitive, an action
can have words of both sensitivities.This makes the use of the global
Regexp::IGNORECASE flag added to all words problematic.
To get around platform limitations around the use of subexpression level
switches/flags, a list of regular expressions is returned instead, one for each
case sensitivity.
Word matching has also been updated to use this list of regular expressions
instead of one.
* FEATURE: Use case-sensitive regular expressions for Watched Words
Update Watched Words regular expressions matching and processing to handle
the extra metadata which comes along with the introduction of
case-sensitive Watched Words.
This allows case-sensitive Watched Words to matched as such.
* DEV: Simplify type casting of case-sensitive flag from uploads
Use builtin semantics instead of a custom method for converting
string case flags in uploaded Watched Words to boolean.
* UX: Add case-sensitivity details to Admin Watched Words UI
Update Watched Word form to include a toggle for case-sensitivity.
This also adds support for, case-sensitive testing and matching of Watched Word
in the admin UI.
* DEV: Code improvements from review feedback
- Extract watched word regex creation out to a utility function
- Make JS array presence check more explicit and readable
* DEV: Extract Watched Word regex creation to utility function
Clean-up work from review feedback. Reduce code duplication.
* DEV: Rename word_matcher_regexp to word_matcher_regexp_list
Since a list is returned now instead of a single regular expression,
change `word_matcher_regexp` to `word_matcher_regexp_list` to better communicate
this change.
* DEV: Incorporate WordWatcher updates from upstream
Resolve conflicts and ensure apply_to_text does not remove non-word characters in matches
that aren't at the beginning of the line.
This commit removes the ability to enable/disable the Sidebar on a per
user basis and introduces a site wide setting. For testing purposes, sidebar can be enabled/disabled via the `enable_sidebar=1` or `enable_sidebar=0` query param.
The previous method for reused the PrettyText logic which applied the
watched word logic, but had the unwanted effect of cooking the text too.
This meant that regular text values were converted to HTML.
Follow up to commit 5a4c35f627.
This is so we can join the Notification table onto the
Bookmark table. A slight refactor was needed to ensure
that the required values are always included and the
consumer does not need to think about this.
The discourse-chat and discourse-data-explorer plugins
will be updated to take advantage of this commit.
It makes more sense to use user_ids for the UserCommScreener
introduced in fa5f3e228c since
in most cases the ID will be available, not the username. This
was discovered while starting work on a plugin that will
use this. In the cases where only usernames are available
the extra query is negligble.
The idea behind this refactor is to centralise all of the user ignoring / muting / disallow PM checks in a single place, so they can be used consistently in core as well as for plugins like chat, while improving the main bulk of the checks to run in a single fast non-AR query.
Also fixed up the invite error when someone is muting/ignoring the user that is trying to invite them to the topic.
Mutating the `raw` variable like this would cause issues upstream, meaning that the modification is not persisted. Instead, we should allocate a new string like the other replacement methods.
If an image is oneboxed directly, then we should replace the onebox URL with a markdown image tag. This ensures that the wrapper link points to the downloaded version rather than the original.
This regressed in bf6f8299
Fixes a flaky spec:
```
1) WordWatcher.word_matcher_regexp format of the result regexp is correct when watched_words_regular_expressions = true
Failure/Error: expect(regexp.inspect).to eq("/(#{word1})|(#{word2})/i")
expected: "/(word35)|(word36)/i"
got: "/(word36)|(word35)/i"
(compared using ==)
# ./spec/services/word_watcher_spec.rb:19:in `block (4 levels) in <main>'
```
We have a `cleanup!` class method on bookmarks that deletes
bookmarks X days after their related record (post/topic) are
deleted. This commit changes this method to use the
registered_bookmarkables for this instead, and each bookmarkable
type can delete related bookmarks in their own way.
Due to some changes we started notifying via push notifications on other
families of notifications. There are a total of about 30 or so possible
notification you could get, some can be pushed.
This fallback means that if for any reason we are unable to find an icon
for a push notification we just fallback to the Discourse logo.
Also go with a simple reply icon for watching first post.
Note, that in production `image_url` can return an exception if an image is
missing. This is not the case in test / development.
Censored watched words were not censored inside the title of an inline
oneboxes. Malicious users could exploit this behaviour to insert bad
words. The same issue has been fixed for regular Oneboxes in commit
d184fe59ca.
Previously, with the default `editing_grace_period`, hotlinked images were pulled 5 minutes after a post is created. This delay was added to reduce the chance of automated edits clashing with user edits.
This commit refactors things so that we can pull hotlinked images immediately. URLs are immediately updated in the post's `cooked` HTML. The post's raw markdown is updated later, after the `editing_grace_period`.
This involves a number of behind-the-scenes changes including:
- Schedule Jobs::PullHotlinkedImages immediately after Jobs::ProcessPost. Move scheduling to after the `update_column` call to avoid race conditions
- Move raw changes into a separate job, which is delayed until after the ninja-edit window
- Move disable_if_low_on_disk_space logic into the `pull_hotlinked_images` job
- Move raw-parsing/replacing logic into `InlineUpload` so it can be easily be shared between `UpdateHotlinkedRaw` and `PullUserProfileHotlinkedImages`
This makes it easier to find PMs involving a particular user, for
example by searching for `in:messages thisUser` (previously, that query
would only return results in posts where `thisUser` was in the post body).
The cache was causing state to leak between tests since the `WatchedWord` record in the DB would have been rolled back but `WordWatcher` still had the word in the cache.
7a284164 previously switched the UserDestroyer to use find_each when iterating over UserHistory records. Unfortunately, since this logic is wrapped in a transaction, this didn't actually solve the memory usage problem. ActiveRecord maintains references to all modified models within a transaction.
This commit updates the logic to use a single SQL query, rather than updating models one-by-one
These validate/after_create/after_destroy methods were added
back in b8828d4a2d before
the RegisteredBookmarkable API and pattern was nailed down.
This commit updates BookmarkManager to call out to the
relevant bookmarkable for these and bookmark_metadata for
consistency.
We have not used anything related to bookmarks for PostAction
or UserAction records since 2020, bookmarks are their own thing
now. Deleting all this is just cleaning up old cruft.
Latest redis interoduces a block form of multi / pipelined, this was incorrectly
passed through and not namespaced.
Fix also updates logster, we held off on upgrading it due to missing functions
A bit of a mixed bag, this addresses several edge areas of bookmarks and makes them compatible with polymorphic bookmarks (hidden behind the `use_polymorphic_bookmarks` site setting). The main ones are:
* ExportUserArchive compatibility
* SyncTopicUserBookmarked job compatibility
* Sending different notifications for the bookmark reminders based on the bookmarkable type
* Import scripts compatibility
* BookmarkReminderNotificationHandler compatibility
This PR also refactors the `register_bookmarkable` API so it accepts a class descended from a `BaseBookmarkable` class instead. This was done because we kept having to add more and more lambdas/properties inline and it was very messy, so a factory pattern is cleaner. The classes can be tested independently as well.
Some later PRs will address some other areas like the discourse narrative bot, advanced search, reports, and the .ics endpoint for bookmarks.
This bug was causing double events to be fired as :user_badge_granted is already called when a `user_badge` is created. More over the signature of the block in the UserBadge code is `badge_id, user_id` not `badge, user_id`.
* hidden siteSetting to enable experimental sidebar
* user preference to enable experimental sidebar
* `experimental_sidebar_enabled` attribute for current user
* Empty glimmer component for Sidebar
This pull request follows on from https://github.com/discourse/discourse/pull/16308. This one does the following:
* Changes `BookmarkQuery` to allow for querying more than just Post and Topic bookmarkables
* Introduces a `Bookmark.register_bookmarkable` method which requires a model, serializer, fields and preload includes for searching. These registered `Bookmarkable` types are then used when validating new bookmarks, and also when determining which serializer to use for the bookmark list. The `Post` and `Topic` bookmarkables are registered by default.
* Adds new specific types for Post and Topic bookmark serializers along with preloading of associations in `UserBookmarkList`
* Changes to the user bookmark list template to allow for more generic bookmarkable types alongside the Post and Topic ones which need to display in a particular way
All of these changes are gated behind the `use_polymorphic_bookmarks` site setting, apart from the .hbs changes where I have updated the original `UserBookmarkSerializer` with some stub methods.
Following this PR will be several plugin PRs (for assign, chat, encrypt) that will register their own bookmarkable types or otherwise alter the bookmark serializers in their own way, also gated behind `use_polymorphic_bookmarks`.
This commit also removes `BookmarkQuery.preloaded_custom_fields` and the functionality surrounding it. It was added in 0cd502a558 but only used by one plugin (discourse-assign) where it has since been removed, and is now used by no plugins. We don't need it anymore.
`Scoped order is ignored, it's forced to be batch order.`
`find_each` ignores the `order` scope and triggers a warning in
production which is noisy.
Follow-up to 7a284164ce
This commit improves the logic for rolling up IPv4 screened IP
addresses and extending it for IPv6. IPv4 addresses will roll up only
up to /24. IPv6 can rollup to /48 at most. The log message that is
generated contains the list of original IPs and new subnet.
All users are members of the EVERYONE group, but this group is special and
is omitted from the group_users table. When checking permission we need to
make sure we also add a bypass.
This also fixes a very buggy test in post_alerter, it was confirming the
broken behavior due to fabricator flow.
When it defined the tag group the everyone group automatically had full access
then the additional permission fabricated just added one more group. After
fix was made to code the test started failing. Fabricators can be risky.
When emailing a group inbox and including other support-type
emails (or even just regular ones with autoresponders) in the
CC field, each automated reply to the group inbox triggered
more emails to be sent out to all CC addresses to notify them
of the new reply, which in turn caused more automated emails
to be sent to the group inbox.
This commit fixes the issue by preventing any emails being sent
by the PostAlerter when the new post has an incoming email record
which is_auto_generated, which we detect in Email::Receiver.
Fixes the issue where making a user x as owner of a post doesn't
cause the concerned topic to be listed in new owner's `My Posts`
top menu filter
per https://meta.discourse.org/t/199369
Under some conditions, replacing an `<img` with `![]()` can break rendering, and make the image disappear.
Context at https://meta.discourse.org/t/152801
The search_ignore_accents site setting can be used to make the search
indexer remove the accents before indexing the content. The unaccent
function from PostgreSQL is better than Ruby's unicode_normalize(:nfkd).
Discourse users and associated accounts are created or updated when a
user logins or connects the account using their account preferences.
This new API can be used to create associated accounts and users too,
if necessary.
This allows text editors to use correct syntax coloring for the heredoc sections.
Heredoc tag names we use:
languages: SQL, JS, RUBY, LUA, HTML, CSS, SCSS, SH, HBS, XML, YAML/YML, MF, ICS
other: MD, TEXT/TXT, RAW, EMAIL
We added this constraint in 5bd55acf83
but it is causing problems in hosted sites and is catching the
issue too far down the line. This commit removes the constraint
for now, and also fixes an issue found with PostDestroyer
which wasn't using the UserStatCountUpdater when updating post_count
and thus was causing negative numbers to occur.
Breakdown of fixes in this commit:
* `UserStat#topic_count` was not updated when visibility of
the topic changed.
* `UserStat#post_count` was not updated when post was hidden or
unhidden.
* `TopicConverter` was only incrementing or decrementing the counts by 1
even if a user has multiple posts in the topic.
* The commit turns off the verbose logging by default as it is just
noise to normal users who are not debugging this problem.
In ab5361d69a, we rescue from the PG error
but the transaction is already aborted causing any DB query after to
fail. As such, we avoid triggering the error in the first place by
checking that we would not be insertin a negative number into the
counter cache.
Follow-up to ab5361d69a
There are still spots in the code base which results in us trying to turn the post and topic count negative. However,
we have a job that runs on a daily basis which will correct the count. Therefore, avoid raising an error for now
and log the exception instead.
Random strings can result into much longer tsvectors. For example
parsing a Base64 string of ~600kb can result in a tsvector of over 1MB,
which is the maximum size of a tsvector.
Follow-up-to: 823c3f09d4
Ensures that `UserStat#post_count` and `UserStat#topic_count` does not
go below 0. When it does like it did now, we tend to have bugs in our
code since we're usually coding with the assumption that the count isn't
negative.
In order to support the constraints, our post and topic fabricators in
tests will now automatically increment the count for the respective
user's `UserStat` as well. We have to do this because our fabricators
bypasss `PostCreator` which holds the responsibility of updating `UserStat#post_count` and
`UserStat#topic_count`.
This commit fixes a bug where we our `HTMLScrubber` was only searching
for emoji img tags which contains only the "emoji" class. However, our emoji image tags
may contain more than just the "emoji" class like "only-emoji" when an
emoji exists by itself on a single line.
Also:
* Remove an unused method (#fill_email)
* Replace a method that was used just once (#generate_username) with `SecureRandom.alphanumeric`
* Remove an obsolete dev puma `tmp/restart` file logic
* File.exists? is deprecated and removed in Ruby 3.2 in favor of
File.exist?
* Dir.exists? is deprecated and removed in Ruby 3.2 in favor of
Dir.exist?
You can add callbacks that get called before updating an already consolidated notification or creating a consolidated one.
Instances of this rule can add callbacks to access the old notifications about to be destroyed or the consolidated one and add additional data inside the data hash versus having to execute extra queries when adding this logic inside the `set_mutations` block.
I plan to use this in an upcoming discourse-reactions PR, where I want to like a post without notifying the user, so I can instead create a reaction notification.
Additionally, we decouple the a11y attributes from the icon itself, which will let us extend the widget's icon without losing them.
This PR moves the behavior from the PostAlerter. We delete an existing liked notification and set the `username2` attribute to the previous `display_username`. We repeat this process unless the last one is old enough or it's not in the most recent ones.