* Add model for custom filter keywords

* Use CustomFilterKeyword internally

Does not change the API

* Fix /filters/edit and /filters/new

* Add migration tests

* Remove whole_word column from custom_filters (covered by custom_filter_keywords)

* Redesign /filters

Instead of a list, present a card that displays more information and handles
multiple keywords per filter.

* Redesign /filters/new and /filters/edit to add and remove keywords

This adds a new gem dependency: cocoon, as well as a npm dependency:
cocoon-js-vanilla. Those are used to easily populate and remove form fields
from the user interface when manipulating multiple keyword filters at once.

* Add /api/v2/filters to edit filter with multiple keywords

Entities:
- `Filter`: `id`, `title`, `filter_action` (either `hide` or `warn`), `context`
  `keywords`
- `FilterKeyword`: `id`, `keyword`, `whole_word`

API endpoits:
- `GET /api/v2/filters` to list filters (including keywords)
- `POST /api/v2/filters` to create a new filter
  `keywords_attributes` can also be passed to create keywords in one request
- `GET /api/v2/filters/:id` to read a particular filter
- `PUT /api/v2/filters/:id` to update a new filter
  `keywords_attributes` can also be passed to edit, delete or add keywords in
   one request
- `DELETE /api/v2/filters/:id` to delete a particular filter
- `GET /api/v2/filters/:id/keywords` to list keywords for a filter
- `POST /api/v2/filters/:filter_id/keywords/:id` to add a new keyword to a
   filter
- `GET /api/v2/filter_keywords/:id` to read a particular keyword
- `PUT /api/v2/filter_keywords/:id` to edit a particular keyword
- `DELETE /api/v2/filter_keywords/:id` to delete a particular keyword

* Change from `irreversible` boolean to `action` enum

* Remove irrelevent `irreversible_must_be_within_context` check

* Fix /filters/new and /filters/edit with update for filter_action

* Fix Rubocop/Codeclimate complaining about task names

* Refactor FeedManager#phrase_filtered?

This moves regexp building and filter caching to the `CustomFilter` class.

This does not change the functional behavior yet, but this changes how the
cache is built, doing per-custom_filter regexps so that filters can be matched
independently, while still offering caching.

* Perform server-side filtering and output result in REST API

* Fix numerous filters_changed events being sent when editing multiple keywords at once

* Add some tests

* Use the new API in the WebUI

- use client-side logic for filters we have fetched rules for.
  This is so that filter changes can be retroactively applied without
  reloading the UI.
- use server-side logic for filters we haven't fetched rules for yet
  (e.g. network error, or initial timeline loading)

* Minor optimizations and refactoring

* Perform server-side filtering on the streaming server

* Change the wording of filter action labels

* Fix issues pointed out by linter

* Change design of “Show anyway” link in accordence to review comments

* Drop “irreversible” filtering behavior

* Move /api/v2/filter_keywords to /api/v1/filters/keywords

* Rename `filter_results` attribute to `filtered`

* Rename REST::LegacyFilterSerializer to REST::V1::FilterSerializer

* Fix systemChannelId value in streaming server

* Simplify code by removing client-side filtering code

The simplifcation comes at a cost though: filters aren't retroactively
applied anymore.

* Remove obsolete RSS::Serializer test

Since #17828, RSS::Serializer no longer has specific code for deleted statuses,
but it is never called on deleted statuses anyway.

* Rename erroneously-named test files

* Fix failing test

* Fix test deprecation warnings

* Update CircleCI Ruby orb

1.4.0 has a bug that does not match all the test files due to incorrect
globbing

* Add migration tests for hide_network settings migration

* Add tests about suspended/suspended_at

* Add more tests regarding the results of migrations

* Fix migration test regarding stale conflicting remote account

* Add migration tests about AccountConversation

* spelling: account

Signed-off-by: Josh Soref <jsoref@users.noreply.github.com>

* spelling: affiliated

Signed-off-by: Josh Soref <jsoref@users.noreply.github.com>

* spelling: appearance

Signed-off-by: Josh Soref <jsoref@users.noreply.github.com>

* spelling: autosuggest

Signed-off-by: Josh Soref <jsoref@users.noreply.github.com>

* spelling: cacheable

Signed-off-by: Josh Soref <jsoref@users.noreply.github.com>

* spelling: component

Signed-off-by: Josh Soref <jsoref@users.noreply.github.com>

* spelling: conversations

Signed-off-by: Josh Soref <jsoref@users.noreply.github.com>

* spelling: domain.example

Clarify what's distinct and use RFC friendly domain space.

Signed-off-by: Josh Soref <jsoref@users.noreply.github.com>

* spelling: environment

Signed-off-by: Josh Soref <jsoref@users.noreply.github.com>

* spelling: exceeds

Signed-off-by: Josh Soref <jsoref@users.noreply.github.com>

* spelling: functional

Signed-off-by: Josh Soref <jsoref@users.noreply.github.com>

* spelling: inefficiency

Signed-off-by: Josh Soref <jsoref@users.noreply.github.com>

* spelling: not

Signed-off-by: Josh Soref <jsoref@users.noreply.github.com>

* spelling: notifications

Signed-off-by: Josh Soref <jsoref@users.noreply.github.com>

* spelling: occurring

Signed-off-by: Josh Soref <jsoref@users.noreply.github.com>

* spelling: position

Signed-off-by: Josh Soref <jsoref@users.noreply.github.com>

* spelling: progress

Signed-off-by: Josh Soref <jsoref@users.noreply.github.com>

* spelling: promotable

Signed-off-by: Josh Soref <jsoref@users.noreply.github.com>

* spelling: reblogging

Signed-off-by: Josh Soref <jsoref@users.noreply.github.com>

* spelling: repetitive

Signed-off-by: Josh Soref <jsoref@users.noreply.github.com>

* spelling: resolve

Signed-off-by: Josh Soref <jsoref@users.noreply.github.com>

* spelling: saturated

Signed-off-by: Josh Soref <jsoref@users.noreply.github.com>

* spelling: similar

Signed-off-by: Josh Soref <jsoref@users.noreply.github.com>

* spelling: strategies

Signed-off-by: Josh Soref <jsoref@users.noreply.github.com>

* spelling: success

Signed-off-by: Josh Soref <jsoref@users.noreply.github.com>

* spelling: targeting

Signed-off-by: Josh Soref <jsoref@users.noreply.github.com>

* spelling: thumbnails

Signed-off-by: Josh Soref <jsoref@users.noreply.github.com>

* spelling: unauthorized

Signed-off-by: Josh Soref <jsoref@users.noreply.github.com>

* spelling: unsensitizes

Signed-off-by: Josh Soref <jsoref@users.noreply.github.com>

* spelling: validations

Signed-off-by: Josh Soref <jsoref@users.noreply.github.com>

* spelling: various

Signed-off-by: Josh Soref <jsoref@users.noreply.github.com>

Co-authored-by: Josh Soref <jsoref@users.noreply.github.com>

- populate the database with some data when testing migrations
- try both one-step and two-step migrations (`SKIP_POST_DEPLOYMENT_MIGRATIONS`)

* Update .ruby-version

* Update Gemfile

* Update Gemfile.lock

* Update Dockerfile

* Update check-i18n.yml

* Update config.yml

* Update config.yml

* Update config.yml

* Update config.yml

* Improve CircleCI config

* Enable PAM only when needed

* Remove Ruby 2.6

* Update config.yml

* Update Dockerfile

* Update .nvmrc

* Update Dockerfile

* NodeJS 10 is EOL.

* Update package.json

* Update README.md

* Update Vagrantfile

* Update Dockerfile

* Update Dockerfile

* Fix issues with POSIX::Spawn, Terrapin and Ruby 3.0

Also improve the Terrapin monkey-patch for the stderr/stdout issue.

* Fix keyword argument handling throughout the codebase

* Monkey-patch Paperclip to fix keyword arguments handling in validators

* Change validation_extensions to please CodeClimate

* Bump microformats from 4.2.1 to 4.3.1

* Allow Ruby 3.0

* Add Ruby 3.0 test target to CircleCI

* Add test for admin dashboard warnings

* Fix admin dashboard warnings on Ruby 3.0

* Update config.yml

* Update config.yml

* Update config.yml

* Update config.yml

* Update config.yml

* Update config.yml

* Update config.yml

* Update .circleci/config.yml

Co-authored-by: Sandro <sandro.jaeckel@gmail.com>

* Update config.yml

Co-authored-by: Sandro <sandro.jaeckel@gmail.com>
Co-authored-by: Eugen Rochko <eugen@zeonfederated.com>

* Use bundle install in deployment mode for Continuous Integration to catch Gemfile.lock issues

* Fix deprecation warnings

* Fix Gemfile.lock

* More changes to catch Gemfile.lock issues

* Update config.yml

* Update Gemfile

* Update README.md

* Update Gemfile

* Update Gemfile

* Update Gemfile

* Update README.md

* Update README.md

* Update config.yml

* Update Gemfile

* Update config.yml

* Update Gemfile.lock

* Add missing locale file for ga and add rake task to check for it

* Update lib/tasks/repo.rake

Co-Authored-By: Yamagishi Kazutoshi <ykzts@desire.sh>

* Fix check-i18n build

* Fix check-i18n builds

* Remove check for missing plural forms

* Update config.yml

* Update Gemfile

* dropping ruby 2.3

2.3 EOL date: scheduled for 2019-03-31

* Updating docker containers

* Update Gemfile

* Update i18n-tasks and CircleCI command

* Fix #9088

* Update i18n-tasks

* Fix ast

* Add consistent interpolations check to CircleCI

* Fix locale strings using wrong variables

* Update i18n-tasks to feature-missing-plural-keys

* Fix pluralizations with missing keys in Arabic

Fix #8554

* Add i18n-tasks missing-plural-keys to CircleCI

and use 'if' option of context block

* Add “bundle clean” suggestion from CircleCI doc

Cf. https://circleci.com/docs/2.0/caching/#bundler-ruby

* Use workspaces instead of caches for ruby gems

Cache are not guaranteed to be available, while the test jobs *require* their
depencies to run. Workspaces are thus more suitable.

One downside is that the order of workspace layer additions need to be
deterministic, which is why install-ruby{2.3,2.4} now depend on
install-ruby2.5.

Tests cannot run without built assets, and we want
exactly the matching assets. This is not a cache.

This replace calls of String#match? with rails Regex#match?
This follows the same idea used to keep Rails 5.2 compatible with Ruby
2.2.2 in https://github.com/rails/rails/pull/32973

* Disable simplecov on CircleCI

* Remove --format progress

* Port travis_retry for CI

* Add license