import { extend } from 'flarum/extend';
import LinkButton from 'flarum/components/LinkButton';
import IndexPage from 'flarum/components/IndexPage';
import DiscussionListState from 'flarum/states/DiscussionListState';

export default function addSubscriptionFilter() {
  extend(IndexPage.prototype, 'navItems', function(items) {
    if (app.session.user) {
      const params = app.search.stickyParams();

      params.filter = 'following';

      items.add('following', LinkButton.component({
        href: app.route('index.filter', params),
        children: app.translator.trans('flarum-subscriptions.forum.index.following_link'),
        icon: 'fas fa-star'
      }), 50);
    }
  });

  extend(IndexPage.prototype, 'config', function () {
    if (m.route() == "/following") {
      app.setTitle(app.translator.trans('flarum-subscriptions.forum.following.meta_title_text'));
    }
  });

  extend(DiscussionListState.prototype, 'requestParams', function(params) {
    if (this.params.filter === 'following') {
      params.filter.q = (params.filter.q || '') + ' is:following';
    }
  });
}

import { extend } from 'flarum/extend';
import LinkButton from 'flarum/components/LinkButton';
import IndexPage from 'flarum/components/IndexPage';
import DiscussionListState from 'flarum/states/DiscussionListState';

export default function addSubscriptionFilter() {
  extend(IndexPage.prototype, 'navItems', function(items) {
    if (app.session.user) {
      const params = this.stickyParams();

      params.filter = 'following';

      items.add('following', LinkButton.component({
        href: app.route('index.filter', params),
        children: app.translator.trans('flarum-subscriptions.forum.index.following_link'),
        icon: 'fas fa-star'
      }), 50);
    }
  });

  extend(IndexPage.prototype, 'config', function () {
    if (m.route() == "/following") {
      app.setTitle(app.translator.trans('flarum-subscriptions.forum.following.meta_title_text'));
    }
  });

  extend(DiscussionListState.prototype, 'requestParams', function(params) {
    if (this.params.filter === 'following') {
      params.filter.q = (params.filter.q || '') + ' is:following';
    }
  });
}

--- 
+++ 
@@ -6,7 +6,7 @@
 export default function addSubscriptionFilter() {
   extend(IndexPage.prototype, 'navItems', function(items) {
     if (app.session.user) {
-      const params = this.stickyParams();
+      const params = app.search.stickyParams();
 
       params.filter = 'following';
 
Fix extension to work with latest state changes

Refs flarum/core#2151.
