Revamp post filtering system (#18058)

* 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.

1 files changed, 17 insertions, 0 deletions

diff --git a/app/javascript/mastodon/components/status_action_bar.js b/app/javascript/mastodon/components/status_action_bar.js
index 1d8fe23da..ab8755be0 100644
--- a/app/javascript/mastodon/components/status_action_bar.js
+++ b/app/javascript/mastodon/components/status_action_bar.js
@@ -38,6 +38,7 @@ const messages = defineMessages({
   admin_account: { id: 'status.admin_account', defaultMessage: 'Open moderation interface for @{name}' },
   admin_status: { id: 'status.admin_status', defaultMessage: 'Open this status in the moderation interface' },
   copy: { id: 'status.copy', defaultMessage: 'Copy link to status' },
+  hide: { id: 'status.hide', defaultMessage: 'Hide toot' },
   blockDomain: { id: 'account.block_domain', defaultMessage: 'Block domain {domain}' },
   unblockDomain: { id: 'account.unblock_domain', defaultMessage: 'Unblock domain {domain}' },
   unmute: { id: 'account.unmute', defaultMessage: 'Unmute @{name}' },
@@ -76,6 +77,7 @@ class StatusActionBar extends ImmutablePureComponent {
     onMuteConversation: PropTypes.func,
     onPin: PropTypes.func,
     onBookmark: PropTypes.func,
+    onFilter: PropTypes.func,
     withDismiss: PropTypes.bool,
     withCounters: PropTypes.bool,
     scrollKey: PropTypes.string,
@@ -207,6 +209,10 @@ class StatusActionBar extends ImmutablePureComponent {
     this.props.onMuteConversation(this.props.status);
   }
 
+  handleFilter = () => {
+    this.props.onFilter();
+  }
+
   handleCopy = () => {
     const url      = this.props.status.get('url');
     const textarea = document.createElement('textarea');
@@ -226,6 +232,11 @@ class StatusActionBar extends ImmutablePureComponent {
     }
   }
 
+
+  handleFilterClick = () => {
+    this.props.onFilter();
+  }
+
   render () {
     const { status, relationship, intl, withDismiss, withCounters, scrollKey } = this.props;
 
@@ -329,6 +340,10 @@ class StatusActionBar extends ImmutablePureComponent {
       <IconButton className='status__action-bar-button' title={intl.formatMessage(messages.share)} icon='share-alt' onClick={this.handleShareClick} />
     );
 
+    const filterButton = this.props.onFilter && (
+      <IconButton className='status__action-bar-button' title={intl.formatMessage(messages.hide)} icon='eye' onClick={this.handleFilterClick} />
+    );
+
     return (
       <div className='status__action-bar'>
         <IconButton className='status__action-bar-button' title={replyTitle} icon={status.get('in_reply_to_account_id') === status.getIn(['account', 'id']) ? 'reply' : replyIcon} onClick={this.handleReplyClick} counter={status.get('replies_count')} obfuscateCount />
@@ -337,6 +352,8 @@ class StatusActionBar extends ImmutablePureComponent {
 
         {shareButton}
 
+        {filterButton}
+
         <div className='status__action-bar-dropdown'>
           <DropdownMenuContainer
             scrollKey={scrollKey}