Keyword/phrase filtering (#7905)

* 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

1 files changed, 11 insertions, 0 deletions

diff --git a/app/javascript/mastodon/reducers/filters.js b/app/javascript/mastodon/reducers/filters.js
new file mode 100644
index 000000000..33f0c6732
--- /dev/null
+++ b/app/javascript/mastodon/reducers/filters.js
@@ -0,0 +1,11 @@
+import { FILTERS_FETCH_SUCCESS } from '../actions/filters';
+import { List as ImmutableList, fromJS } from 'immutable';
+
+export default function filters(state = ImmutableList(), action) {
+  switch(action.type) {
+  case FILTERS_FETCH_SUCCESS:
+    return fromJS(action.filters);
+  default:
+    return state;
+  }
+};