Add option to make the landing page be /about even when trends are enabled (#20808)

* Add option to make the landing page be /about even when trends are enabled

* Restablish /explore as landing page by default

7 files changed, 13 insertions, 2 deletions

diff --git a/app/javascript/mastodon/features/ui/index.js b/app/javascript/mastodon/features/ui/index.js
index b05956606..3fbe03fdf 100644
--- a/app/javascript/mastodon/features/ui/index.js
+++ b/app/javascript/mastodon/features/ui/index.js
@@ -54,7 +54,7 @@ import {
   About,
   PrivacyPolicy,
 } from './util/async-components';
-import initialState, { me, owner, singleUserMode, showTrends } from '../../initial_state';
+import initialState, { me, owner, singleUserMode, showTrends, trendsAsLanding } from '../../initial_state';
 import { closeOnboarding, INTRODUCTION_VERSION } from 'mastodon/actions/onboarding';
 import Header from './components/header';
 
@@ -163,7 +163,7 @@ class SwitchingColumnsArea extends React.PureComponent {
       }
     } else if (singleUserMode && owner && initialState?.accounts[owner]) {
       redirect = <Redirect from='/' to={`/@${initialState.accounts[owner].username}`} exact />;
-    } else if (showTrends) {
+    } else if (showTrends && trendsAsLanding) {
       redirect = <Redirect from='/' to='/explore' exact />;
     } else {
       redirect = <Redirect from='/' to='/about' exact />;
diff --git a/app/javascript/mastodon/initial_state.js b/app/javascript/mastodon/initial_state.js
index 62fd4ac72..5bb8546eb 100644
--- a/app/javascript/mastodon/initial_state.js
+++ b/app/javascript/mastodon/initial_state.js
@@ -75,6 +75,7 @@
  * @property {boolean} timeline_preview
  * @property {string} title
  * @property {boolean} trends
+ * @property {boolean} trends_as_landing_page
  * @property {boolean} unfollow_modal
  * @property {boolean} use_blurhash
  * @property {boolean=} use_pending_items
@@ -126,6 +127,7 @@ export const singleUserMode = getMeta('single_user_mode');
 export const source_url = getMeta('source_url');
 export const timelinePreview = getMeta('timeline_preview');
 export const title = getMeta('title');
+export const trendsAsLanding = getMeta('trends_as_landing_page');
 export const unfollowModal = getMeta('unfollow_modal');
 export const useBlurhash = getMeta('use_blurhash');
 export const usePendingItems = getMeta('use_pending_items');
diff --git a/app/models/form/admin_settings.rb b/app/models/form/admin_settings.rb
index dc6cc5ed3..132b57b04 100644
--- a/app/models/form/admin_settings.rb
+++ b/app/models/form/admin_settings.rb
@@ -23,6 +23,7 @@ class Form::AdminSettings
     thumbnail
     mascot
     trends
+    trends_as_landing_page
     trendable_by_default
     show_domain_blocks
     show_domain_blocks_rationale
@@ -46,6 +47,7 @@ class Form::AdminSettings
     preview_sensitive_media
     profile_directory
     trends
+    trends_as_landing_page
     trendable_by_default
     noindex
     require_invite_text
diff --git a/app/serializers/initial_state_serializer.rb b/app/serializers/initial_state_serializer.rb
index 70f40088d..1bd62c26f 100644
--- a/app/serializers/initial_state_serializer.rb
+++ b/app/serializers/initial_state_serializer.rb
@@ -32,6 +32,7 @@ class InitialStateSerializer < ActiveModel::Serializer
       activity_api_enabled: Setting.activity_api_enabled,
       single_user_mode: Rails.configuration.x.single_user_mode,
       translation_enabled: TranslationService.configured?,
+      trends_as_landing_page: Setting.trends_as_landing_page,
     }
 
     if object.current_account
diff --git a/app/views/admin/settings/discovery/show.html.haml b/app/views/admin/settings/discovery/show.html.haml
index 59188833b..759bbdceb 100644
--- a/app/views/admin/settings/discovery/show.html.haml
+++ b/app/views/admin/settings/discovery/show.html.haml
@@ -19,6 +19,9 @@
     = f.input :trends, as: :boolean, wrapper: :with_label
 
   .fields-group
+    = f.input :trends_as_landing_page, as: :boolean, wrapper: :with_label
+
+  .fields-group
     = f.input :trendable_by_default, as: :boolean, wrapper: :with_label, recommended: :not_recommended
 
   %h4= t('admin.settings.discovery.public_timelines')
diff --git a/config/locales/simple_form.en.yml b/config/locales/simple_form.en.yml
index f66e12c4c..d01f0ae75 100644
--- a/config/locales/simple_form.en.yml
+++ b/config/locales/simple_form.en.yml
@@ -96,6 +96,7 @@ en:
         timeline_preview: Logged out visitors will be able to browse the most recent public posts available on the server.
         trendable_by_default: Skip manual review of trending content. Individual items can still be removed from trends after the fact.
         trends: Trends show which posts, hashtags and news stories are gaining traction on your server.
+        trends_as_landing_page: Show trending content to logged-out users and visitors instead of a description of this server. Requires trends to be enabled.
       form_challenge:
         current_password: You are entering a secure area
       imports:
@@ -256,6 +257,7 @@ en:
         timeline_preview: Allow unauthenticated access to public timelines
         trendable_by_default: Allow trends without prior review
         trends: Enable trends
+        trends_as_landing_page: Use trends as the landing page
       interactions:
         must_be_follower: Block notifications from non-followers
         must_be_following: Block notifications from people you don't follow
diff --git a/config/settings.yml b/config/settings.yml
index ec8fead0f..f0b09dd5c 100644
--- a/config/settings.yml
+++ b/config/settings.yml
@@ -35,6 +35,7 @@ defaults: &defaults
   use_blurhash: true
   use_pending_items: false
   trends: true
+  trends_as_landing_page: true
   trendable_by_default: false
   crop_images: true
   notification_emails: