* Add a spam check
* Use Nilsimsa to generate locality-sensitive hashes and compare using Levenshtein distance
* Add more tests
* Add exemption when the message is a reply to something that mentions the sender
* Use Nilsimsa Compare Value instead of Levenshtein distance
* Use MD5 for messages shorter than 10 characters
* Add message to automated report, do not add non-public statuses to
automated report, add trust level to accounts and make unsilencing
raise the trust level to prevent repeated spam checks on that account
* Expire spam check data after 3 months
* Add support for local statuses, reduce expiration to 1 week, always create a report
* Add content warnings to the spam check and exempt empty statuses
* Change Nilsimsa threshold to 95 and make sure removed statuses are removed from the spam check
* Add all matched statuses into automatic report
* Record account suspend/silence time and keep track of domain blocks
* Also unblock users who were suspended/silenced before dates were recorded
* Add tests
* Keep track of suspending date for users suspended through the CLI
* Show accurate number of accounts that would be affected by unsuspending an instance
* Change migration to set silenced_at and suspended_at
* Revert "Also unblock users who were suspended/silenced before dates were recorded"
This reverts commit a015c65d2d.
* Switch from using suspended and silenced to suspended_at and silenced_at
* Add post-deployment migration script to remove `suspended` and `silenced` columns
* Use Account#silence! and Account#suspend! instead of updating the underlying property
* Add silenced_at and suspended_at migration to post-migration
* Change account fabricator to translate suspended and silenced attributes
* Minor fixes
* Make unblocking domains always retroactive
Conflicts:
- app/controllers/statuses_controller.rb
minor conflict because of glitch-soc's theming system
- app/controllers/stream_entries_controller.rb
minor conflict because of glitch-soc's theming system
* Add blurhash
* Use fallback color for spoiler when blurhash missing
* Federate the blurhash and accept it as long as it's at most 5x5
* Display unknown media attachments as blurhash placeholders
* Improve style of embed actions and spoiler button
* Change blurhash resolution from 3x3 to 4x4
* Improve dependency definitions
* Fix code style issues
Conflicts:
- app/views/admin/pending_accounts/index.html.haml
No real conflict, upstream changes too close to glitch-specific
theming system changes.
- config/navigation.rb
Upstream redesigned the settings navigation, took those changes
and re-inserted the flavours menu.
* Add "why do you want to join" field to invite requests
Fix#10512
* Remove unused translations
* Fix broken registrations when no invite request text is submitted
Conflicts:
- config/locales/en.yml
Conflict caused by the glitch-soc-specific “flavour” string being too close
to the newly introduced “identity_proofs” string. Just included both.
* create account_identity_proofs table
* add endpoint for keybase to check local proofs
* add async task to update validity and liveness of proofs from keybase
* first pass keybase proof CRUD
* second pass keybase proof creation
* clean up proof list and add badges
* add avatar url to keybase api
* Always highlight the “Identity Proofs” navigation item when interacting with proofs.
* Update translations.
* Add profile URL.
* Reorder proofs.
* Add proofs to bio.
* Update settings/identity_proofs front-end.
* Use `link_to`.
* Only encode query params if they exist.
URLs without params had a trailing `?`.
* Only show live proofs.
* change valid to active in proof list and update liveness before displaying
* minor fixes
* add keybase config at well-known path
* extremely naive feature flagging off the identity proof UI
* fixes for rubocop
* make identity proofs page resilient to potential keybase issues
* normalize i18n
* tweaks for brakeman
* remove two unused translations
* cleanup and add more localizations
* make keybase_contacts an admin setting
* fix ExternalProofService my_domain
* use Addressable::URI in identity proofs
* use active model serializer for keybase proof config
* more cleanup of keybase proof config
* rename proof is_valid and is_live to proof_valid and proof_live
* cleanup
* assorted tweaks for more robust communication with keybase
* Clean up
* Small fixes
* Display verified identity identically to verified links
* Clean up unused CSS
* Add caching for Keybase avatar URLs
* Remove keybase_contacts setting
Conflicts:
- app/controllers/accounts_controller.rb
- app/controllers/follower_accounts_controller.rb
- app/controllers/statuses_controller.rb
All conflicts caused by the additional `use_pack` used for glitch-soc's theming
system.
* Add polls
Fix#1629
* Add tests
* Fixes
* Change API for creating polls
* Use name instead of content for votes
* Remove poll validation for remote polls
* Add polls to public pages
* When updating the poll, update options just in case they were changed
* Fix public pages showing both poll and other media
Conflicts:
- app/controllers/oauth/authorized_applications_controller.rb
Two changes too close to each other
- app/controllers/settings/sessions_controller.rb
- app/lib/user_settings_decorator.rb
Two changes too close to each other
- app/models/media_attachment.rb
New changes too close to glitch-soc only changes.
- app/models/user.rb
Two changes too close to each other.
- app/services/remove_status_service.rb
Kept direct timeline code which had been removed upstream.
- app/views/settings/preferences/show.html.haml
Two changes too close to each other.
- config/locales/en.yml
Introduction of a new string too close to glitch-soc-only's “flavour”
- config/locales/ja.yml
Introduction of a new string too close to glitch-soc-only's “flavour”
- config/locales/pl.yml
Introduction of a new string too close to glitch-soc-only's “flavour”
- config/locales/simple_form.en.yml
Introduction of a new string too close to glitch-soc-only's “skin”
- config/locales/simple_form.pl.yml
Introduction of a new string too close to glitch-soc-only's “skin”
- config/settings.yml
Reverted upstream's decision of enabling posting application by default.
* Add hashtag filter to profiles
GET /@:username/tagged/:hashtag
GET /api/v1/accounts/:id/statuses?tagged=:hashtag
* Display featured hashtags on public profile
* Use separate model for featured tags
* Update featured hashtag counters on-write
* Limit featured tags to 10
* Add Tombstone model to remember object deletion
* Do not recreate a status if it has been deleted
* Record Tombstone for remote deleted items
Also, only record deleted items from same-host actors
* Clear an user's tombstones when their key change
Conflicts:
- .eslintrc.yml
Removed, as upstream removed it.
- app/controllers/admin/statuses_controller.rb
Minor code cleanup when porting one of our features.
- app/models/account.rb
Note length validation has changed upstream.
We now use upstream's validation (dropped legacy glitch-soc
account metadata stuff) but with configurable limit.
- app/services/post_status_service.rb
Upstream has added support for scheduled toots, refactoring
the code a bit. Adapted our changes to this refactoring.
- app/views/stream_entries/_detailed_status.html.haml
Not a real conflict, changes too close.
- app/views/stream_entries/_simple_status.html.haml
Not a real conflict, changes too close.
* Add REST API for creating an account
The method is available to apps with a token obtained via the client
credentials grant. It creates a user and account records, as well as
an access token for the app that initiated the request. The user is
unconfirmed, and an e-mail is sent as usual.
The method returns the access token, which the app should save for
later. The REST API is not available to users with unconfirmed
accounts, so the app must be smart to wait for the user to click a
link in their e-mail inbox.
The method is rate-limited by IP to 5 requests per 30 minutes.
* Redirect users back to app from confirmation if they were created with an app
* Add tests
* Return 403 on the method if registrations are not open
* Require agreement param to be true in the API when creating an account
* Add moderation warnings
Replace individual routes for disabling, silencing, and suspending
a user, as well as the report update route, with a unified account
action controller that allows you to select an action (none,
disable, silence, suspend) as well as whether it should generate an
e-mail notification with optional custom text. That notification,
with the optional custom text, is saved as a warning.
Additionally, there are warning presets you can configure to save
time when performing the above.
* Use Account#local_username_and_domain
* Make custom emoji domains case sensitive #9351
* Fixup style in downcase_domain to comply with codeclimate.
* switch if! to unless
* Don't use transactions, operate in batches.
Also revert spurious schema change.
* fix: change Identity's id column to a bigint
This appears to be the last model created using a 5.0 migration,
where column types defaulted to `integer` rather than `bigint`.
This migration changes the column type to match that of all of the
other ID columns.
* Change user_id column in identities to bigint and fix down-migration
* Add locality check to ActivityPub::FetchRemoteAccountService
Fix#8643
Because there are a few places where it is called, it is difficult
to confirm if they all previously checked it for locality. It's better
to make sure within the service.
* Remove faux-remote duplicates of local accounts
Conflicts:
- app/controllers/admin/base_controller.rb
- app/controllers/filters_controller.rb
- app/controllers/invites_controller.rb
- app/controllers/settings/deletes_controller.rb
- app/controllers/settings/exports_controller.rb
- app/controllers/settings/follower_domains_controller.rb
- app/controllers/settings/migrations_controller.rb
- app/controllers/settings/notifications_controller.rb
- app/controllers/settings/preferences_controller.rb
- app/controllers/settings/two_factor_authentication/recovery_codes_controller.rb
- app/javascript/packs/public.js
- app/views/settings/profiles/show.html.haml
Conflicts were mostly due to the addition of body classes to the settings page,
this was caused by rejecting upstream changes for most of those files and
modifying Settings::BaseController instead.
Another cause of conflicts was the deletion of client-side checking of
display name / bio length, this was modified in app/javascript/core/settings.js
instead.
Conflicts:
- .github/ISSUE_TEMPLATE/bug_report.md
Took our version.
- CONTRIBUTING.md
Updated the embedded copy of upstream's version.
- README.md
Took our version.
- app/policies/status_policy.rb
Not a real conflict, took code from both.
- app/views/layouts/embedded.html.haml
Added upstream's changes (dns-prefetch) and fixed
`%body.embed`
- app/views/settings/preferences/show.html.haml
Reverted some of upstream changes, as we have a
page dedicated for flavours and skins.
- config/initializers/content_security_policy.rb
Kept our version of the CSP.
- config/initializers/doorkeeper.rb
Not a real conflict, took code from both.
* Add silent column to mentions
* Save silent mentions in ActivityPub Create handler and optimize it
Move networking calls out of the database transaction
* Add "limited" visibility level masked as "private" in the API
Unlike DMs, limited statuses are pushed into home feeds. The access
control rules between direct and limited statuses is almost the same,
except for counter and conversation logic
* Ensure silent column is non-null, add spec
* Ensure filters don't check silent mentions for blocks/mutes
As those are "this person is also allowed to see" rather than "this
person is involved", therefore does not warrant filtering
* Clean up code
* Use Status#active_mentions to limit returned mentions
* Fix code style issues
* Use Status#active_mentions in Notification
And remove stream_entry eager-loading from Notification
* Add conversations API
* Add web UI for conversations
* Add test for conversations API
* Add tests for ConversationAccount
* Improve web UI
* Rename ConversationAccount to AccountConversation
* Remove conversations on block and mute
* Change last_status_id to be a denormalization of status_ids
* Add optimistic locking
Conflicts:
db/migrate/20170716191202_add_hide_notifications_to_mute.rb
spec/controllers/application_controller_spec.rb
Took our version, upstream changes were only minor style linting.
Conflicts:
.circleci/config.yml
app/controllers/authorize_follows_controller.rb
app/javascript/packs/public.js
Moved new stuff from packs/public.js to core/public.js.
Added appropriate use_pack in new controllers.
Conflicts:
app/models/status.rb
db/migrate/20180528141303_fix_accounts_unique_index.rb
db/schema.rb
Resolved by taking upstream changes (no real conflicts, just glitch-soc
specific code too close to actual changes).
There were some concerns with the custom filter migration script dropping a table,
thus making it unsafe to run in a zero-downtime setting. Upstream introduced
a way to run migrations after deployment, so revisit the old migration script to
make use of this.
Include a dummy Account class in the migration script containing only the
attributes relevant to the migration in order to not rely as much on the
codebase being in sync with the database schema.
Include a dummy Account class in the migration script containing only the
attributes relevant to the migration in order to not rely as much on the
codebase being in sync with the database schema.
Conflicts:
app/controllers/accounts_controller.rb
app/javascript/mastodon/locales/pl.json
app/views/about/more.html.haml
Conflicts in `accounts_controller.rb` resolved by taking upstream's
version + our `use_pack`.
Conflicts in `pl.json` resolved by taking upstream's changes.
Conflicts in `aboute/more.html.haml` resolved by taking upstream's changes.
Conflicts:
Dockerfile
app/javascript/packs/common.js
config/webpack/loaders/sass.js
config/webpack/shared.js
db/schema.rb
package.json
yarn.lock
A lot of the conflicts come from updating webpack.
Even though upstream deleted app/javascript/packs/common.js, I kept
glitch-soc's version as it unifies JS/CSS packs behavior across flavours.
Ported glitch changes to webpack 4.x
Completely remove glitch-soc's Keyword Mutes, migrate
existing database records to CustomFilters.
Handling of client-side filters is still not implemented
in the glitch-soc front-end.
Conflicts:
README.md
app/controllers/statuses_controller.rb
app/lib/feed_manager.rb
config/navigation.rb
spec/lib/feed_manager_spec.rb
Conflicts were resolved by taking both versions for each change.
This means the two filter systems (glitch-soc's keyword mutes and tootsuite's
custom filters) are in place, which will be changed in a follow-up commit.
* Add keyword filtering
GET|POST /api/v1/filters
GET|PUT|DELETE /api/v1/filters/:id
- Irreversible filters can drop toots from home or notifications
- Other filters can hide toots through the client app
- Filters use a phrase valid in particular contexts, expiration
* Make sure expired filters don't get applied client-side
* Add missing API methods
* Remove "regex filter" from column settings
* Add tests
* Add test for FeedManager
* Add CustomFilter test
* Add UI for managing filters
* Add streaming API event to allow syncing filters
* Fix tests
Conflicts:
app/javascript/mastodon/initial_state.js
db/schema.rb
Upstream added a new field to initial_state.
Not too sure about what happened with db/schema.rb though…
Also add an apply_to_mentions attribute on Glitch::KeywordMute, which is
used to calculate scope. Next up: additions to the test suite to
demonstrate how scoping works.
Conflicts:
app/javascript/mastodon/locales/en.json
app/javascript/mastodon/locales/ja.json
app/javascript/mastodon/locales/pl.json
The above conflicts appear to be a text conflict introduced by
glitch-soc's additional level of columns (i.e. moving a bunch of columns
under the Misc option). They were resolved via accept-ours.
* Wrong exception class: ActiveRecord::RecordNotUnique, not PG::UniqueViolation
It's completely not obvious but PG::UniqueViolation is just a string inside the exception message, not the actual class of the exception
* Favourite does not have target_account_id
* Improve account index migration
- Display more progress in stdout
- Catch PG::UniqueViolation when re-attributing favourites
- Skip callbacks and validations when re-attributing other relationships
* Use in_batches to reduce table lock-up during account merge
* Use #say_with_time to benchmark each deduplication
Queries with the combination of account_id, id, and visibility can be
categorized in three types:
1. Querying for public and unlisted to enumerate statuses visible to
anyone.
2. Querying for public, unlisted, and private to enumerate statuses
visible to follower.
3. Querying for direct to enumerate own direct statuses.
1 and 2 is covered by the index with condition 'visibility IN (0, 1, 2)'.
It would bring better performance in case that there are many direct
statuses.
The index with condition 'visibility = 3' is just for 3. It would be much
faster to query direct statuses thanks to this query.
The total size of those two indexes are expected to be smaller than the
deleted one because they are partial and does not have to cover all the
table.
- POST /api/v1/push/subscription
- PUT /api/v1/push/subscription
- DELETE /api/v1/push/subscription
- New OAuth scope: "push" (required for the above methods)
Same URI passed between follow request and follow, since they are
the same thing in ActivityPub. Local URIs are generated during
creation using UUIDs and are passed to serializers.
* Add bio fields
- Fix#3211
- Fix#232
- Fix#121
* Display bio fields in web UI
* Fix output of links and missing fields
* Federate bio fields over ActivityPub as PropertyValue
* Improve how the fields are stored, add to Edit profile form
* Add rel=me to links in fields
Fix#121
* Implement Assignment of Reports (#6967)
* Change translation of admin.report.comment.label to "Report Comment" for clarity
As we'll soon add the ability for reports to have comments on them, this clarification makes sense.
* Implement notes for Reports
This enables moderators to leave comments about a report whilst they work on it
* Fix display of report moderation notes
* Allow reports to be reopened / marked as unresolved
* Redirect to reports listing upon resolution of report
* Implement "resolve with note" functionality
* Add inverse relationship for report notes
* Remove additional database querying when loading report notes
* Fix tests for reports
* Fix localisations for report notes / reports
* Fix#201: Account archive download
* Export actor and private key in the archive
* Optimize BackupService
- Add conversation to cached associations of status, because
somehow it was forgotten and is source of N+1 queries
- Explicitly call GC between batches of records being fetched
(Model class allocations are the worst offender)
- Stream media files into the tar in 1MB chunks
(Do not allocate media file (up to 8MB) as string into memory)
- Use #bytesize instead of #size to calculate file size for JSON
(Fix FileOverflow error)
- Segment media into subfolders by status ID because apparently
GIF-to-MP4 media are all named "media.mp4" for some reason
* Keep uniquely generated filename in Paperclip::GifTranscoder
* Ensure dumped files do not overwrite each other by maintaing directory partitions
* Give tar archives a good name
* Add scheduler to remove week-old backups
* Fix code style issue
Migration is wrapped by transaction, so manual `commit_db_transaction` without transaction restarting causes "there is no transaction in progress" warnings. We should use `disable_ddl_transaction!` instead, if we can omit transaction completely.
* Allow hiding of reblogs from followed users
This adds a new entry to the account menu to allow users to hide
future reblogs from a user (and then if they've done that, to show
future reblogs instead).
This does not remove or add historical reblogs from/to the user's
timeline; it only affects new statuses.
The API for this operates by sending a "reblogs" key to the follow
endpoint. If this is sent when starting a new follow, it will be
respected from the beginning of the follow relationship (even if
the follow request must be approved by the followee). If this is
sent when a follow relationship already exists, it will simply
update the existing follow relationship. As with the notification
muting, this will now return an object ({reblogs: [true|false]}) or
false for each follow relationship when requesting relationship
information for an account. This should cause few issues due to an
object being truthy in many languages, but some modifications may
need to be made in pickier languages.
Database changes: adds a show_reblogs column (default true,
non-nullable) to the follows and follow_requests tables. Because
these are non-nullable, we use the existing MigrationHelpers to
perform this change without locking those tables, although the
tables are likely to be small anyway.
Tests included.
See also <https://github.com/glitch-soc/mastodon/pull/212>.
* Rubocop fixes
* Code review changes
* Test fixes
This patchset closes#648 and resolves#3271.
* Rubocop fix
* Revert reblogs defaulting in argument, fix tests
It turns out we needed this for the same reason we needed it in muting:
if nil gets passed in somehow (most usually by an API client not passing
any value), we need to detect and handle it.
We could specify a default in the parameter and then also catch nil, but
there's no great reason to duplicate the default value.
We added an index for `[account_id, reblog_of_id]`, but we already have a similar index for `reblog_of_id`. Those index will be bigger according to statuses count. For example, `reblog_of_id` index uses 800MB for 10GB statuses table.
So this patch swaps indexed columns like `[reblog_of_id, account_id]`, then it will covers both usage with single index.
Since those index creation may take a while, I've also disabled previous index creation.
* Add consumable invites
* Add UI for generating invite codes
* Add tests
* Display max uses and expiration in invites table, delete invite
* Remove unused column and redundant validator
- Default follows not used, probably bad idea
- InviteCodeValidator is redundant because RegistrationsController
checks invite code validity
* Add admin setting to disable invites
* Add admin UI for invites, configurable role for invite creation
- Admin UI that lists everyone's invites, always available
- Admin setting min_invite_role to control who can invite people
- Non-admin invite UI only visible if users are allowed to
* Do not remove invites from database, expire them instantly
* Serialize moved accounts into REST and ActivityPub APIs
* Parse federated moved accounts from ActivityPub
* Add note about moved accounts to public profiles
* Add moved account message to web UI
* Fix code style issues
* Add structure for lists
* Add list timeline streaming API
* Add list APIs, bind list-account relation to follow relation
* Add API for adding/removing accounts from lists
* Add pagination to lists API
* Add pagination to list accounts API
* Adjust scopes for new APIs
- Creating and modifying lists merely requires "write" scope
- Fetching information about lists merely requires "read" scope
* Add test for wrong user context on list timeline
* Clean up tests
* Add a hide_notifications column to mutes
* Add muting_notifications? and a notifications argument to mute!
* block notifications in notify_service from hard muted accounts
* Add specs for how mute! interacts with muting_notifications?
* specs testing that hide_notifications in mutes actually hides notifications
* Add support for muting notifications in MuteService
* API support for muting notifications (and specs)
* Less gross passing of notifications flag
* Break out a separate mute modal with a hide-notifications checkbox.
* Convert profile header mute to use mute modal
* Satisfy eslint.
* specs for MuteService notifications params
* add trailing newlines to files for Pork :)
* Put the label for the hide notifications checkbox in a label element.
* Add a /api/v1/mutes/details route that just returns the array of mutes.
* Define a serializer for /api/v1/mutes/details
* Add more specs for the /api/v1/mutes/details endpoint
* Expose whether a mute hides notifications in the api/v1/relationships endpoint
* Show whether muted users' notifications are muted in account lists
* Allow modifying the hide_notifications of a mute with the /api/v1/accounts/:id/mute endpoint
* make the hide/unhide notifications buttons work
* satisfy eslint
* In probably dead code, replace a dispatch of muteAccount that was skipping the modal with launching the mute modal.
* fix a missing import
* add an explanatory comment to AccountInteractions
* Refactor handling of default params for muting to make code cleaner
* minor code style fixes oops
* Fixed a typo that was breaking the account mute API endpoint
* Apply white-space: nowrap to account relationships icons
* Fix code style issues
* Remove superfluous blank line
* Rename /api/v1/mutes/details -> /api/v2/mutes
* Don't serialize "account" in MuteSerializer
Doing so is somewhat unnecessary since it's always the current user's account.
* Fix wrong variable name in api/v2/mutes
* Use Toggle in place of checkbox in the mute modal.
* Make the Toggle in the mute modal look better
* Code style changes in specs and removed an extra space
* Code review suggestions from akihikodaki
Also fixed a syntax error in tests for AccountInteractions.
* Make AddHideNotificationsToMute Concurrent
It's not clear how much this will benefit instances in practice, as the
number of mutes tends to be pretty small, but this should prevent any
blocking migrations nonetheless.
* Fix up migration things
* Remove /api/v2/mutes
* Add moderator role and add pundit policies for admin actions
* Add rake task for turning user into mod and revoking it again
* Fix handling of unauthorized exception
* Deliver new report e-mails to staff, not just admins
* Add promote/demote to admin UI, hide some actions conditionally
* Fix unused i18n
Note that this will only hide/show *future* reblogs by a user, and does
nothing to remove/add reblogs that are already in the timeline. I don't
think that's a particularly confusing behavior, and it's a lot easier
to implement (similar to mutes, I believe).
We have changed how we store reblogs in the redis for bigint IDs. This process is done by 1) scan all entries in users feed, and 2) re-store reblogs by 3 write commands.
However, this operation is really slow for large instances. e.g. 1hrs on friends.nico (w/ 50k users). So I have tried below tweaks.
* It checked non-reblogs by `entry[0] == entry[1]`, but this condition won't work because `entry[0]` is String while `entry[1]` is Float. Changing `entry[0].to_i == entry[1]` seems work.
-> about 4-20x faster (feed with less reblogs will be faster)
* Write operations can be batched by pipeline
-> about 6x faster
* Wrap operation by Lua script and execute by EVALSHA command. This really reduces packets between Ruby and Redis.
-> about 3x faster
I've taken Lua script way, though doing other optimizations may be enough.
There are two motivations for this:
1. It looks like we're going to add other features that require
server-side storage (e.g. user notes).
2. Namespacing glitchsoc modifications is a good idea anyway: even if we
do not end up doing (1), if upstream introduces a keyword-mute feature
that also uses a "KeywordMute" model, we can avoid some merge
conflicts this way and work on the more interesting task of
choosing which implementation to use.
Word-boundary matching only works as intended in English and languages
that use similar word-breaking characters; it doesn't work so well in
(say) Japanese, Chinese, or Thai. It's unacceptable to have a feature
that doesn't work as intended for some languages. (Moreso especially
considering that it's likely that the largest contingent on the Mastodon
bit of the fediverse speaks Japanese.)
There are rules specified in Unicode TR29[1] for word-breaking across
all languages supported by Unicode, but the rules deliberately do not
cover all cases. In fact, TR29 states
For example, reliable detection of word boundaries in languages such
as Thai, Lao, Chinese, or Japanese requires the use of dictionary
lookup, analogous to English hyphenation.
So we aren't going to be able to make word detection work with regexes
within Mastodon (or glitchsoc). However, for a first pass (even if it's
kind of punting) we can allow the user to choose whether they want word
or substring detection and warn about the limitations of this
implementation in, say, docs.
[1]: https://unicode.org/reports/tr29/https://web.archive.org/web/20171001005125/https://unicode.org/reports/tr29/
Gist of the proposed keyword mute implementation:
Keyword mutes are represented server-side as one keyword per record.
For each account, there exists a keyword regex that is generated as one
big alternation of all keywords. This regex is cached (in Redis, I
guess) so we can quickly get it when filtering in FeedManager.
* Add foreign key constraint to column `account` in `account_moderation_notes`
* Change account_id and target_account_id to non-nullable in account_moderation_notes
* Add dependent: :destroy to account and target_account in account_moderation_notes
