Add edit history to web UI (#17390)

* Add edit history to web UI

* Change history reducer to store items per status

* Fix missing loading prop

app/javascript/mastodon/reducers/history.js

@@ -0,0 +1,28 @@
+import { HISTORY_FETCH_REQUEST, HISTORY_FETCH_SUCCESS, HISTORY_FETCH_FAIL } from 'mastodon/actions/history';
+import { Map as ImmutableMap, List as ImmutableList, fromJS } from 'immutable';
+
+const initialHistory = ImmutableMap({
+  loading: false,
+  items: ImmutableList(),
+});
+
+const initialState = ImmutableMap();
+
+export default function history(state = initialState, action) {
+  switch(action.type) {
+  case HISTORY_FETCH_REQUEST:
+    return state.update(action.statusId, initialHistory, history => history.withMutations(map => {
+      map.set('loading', true);
+      map.set('items', ImmutableList());
+    }));
+  case HISTORY_FETCH_SUCCESS:
+    return state.update(action.statusId, initialHistory, history => history.withMutations(map => {
+      map.set('loading', false);
+      map.set('items', fromJS(action.history.map((x, i) => ({ ...x, account: x.account.id, original: i === 0 })).reverse()));
+    }));
+  case HISTORY_FETCH_FAIL:
+    return state.update(action.statusId, initialHistory, history => history.set('loading', false));
+  default:
+    return state;
+  }
+}

app/javascript/mastodon/reducers/index.js

@@ -38,6 +38,7 @@ import announcements from './announcements';
 import markers from './markers';
 import picture_in_picture from './picture_in_picture';
 import accounts_map from './accounts_map';
+import history from './history';
 
 const reducers = {
   announcements,
@@ -79,6 +80,7 @@ const reducers = {
   missed_updates,
   markers,
   picture_in_picture,
+  history,
 };
 
 export default combineReducers(reducers);