Split setting for timeline_preview into timeline_preview_local and timeline_preview_remote

app/models/form/admin_settings.rb

@@ -14,7 +14,8 @@ class Form::AdminSettings
     site_terms
     registrations_mode
     closed_registrations_message
-    timeline_preview
+    timeline_preview_local
+    timeline_preview_remote
     bootstrap_timeline_accounts
     theme
     activity_api_enabled
@@ -48,7 +49,8 @@ class Form::AdminSettings
   ).freeze
 
   BOOLEAN_KEYS = %i(
-    timeline_preview
+    timeline_preview_local
+    timeline_preview_remote
     activity_api_enabled
     peers_api_enabled
     preview_sensitive_media

config/settings.yml

@@ -12,7 +12,8 @@ defaults: &defaults
   registrations_mode: 'none'
   profile_directory: true
   closed_registrations_message: ''
-  timeline_preview: true
+  timeline_preview_local: true
+  timeline_preview_remote: false
   show_staff_badge: true
   preview_sensitive_media: false
   noindex: false

db/migrate/20240817155611_split_public_timelines_setting.rb

@@ -0,0 +1,25 @@
+# frozen_string_literal: true
+
+class SplitPublicTimelinesSetting < ActiveRecord::Migration[7.1]
+  def up
+    previous_setting = Setting.find_by(var: 'timeline_preview')
+
+    unless previous_setting.nil?
+      Setting['timeline_preview_local'] = previous_setting.value
+      Setting['timeline_preview_remote'] = previous_setting.value
+      previous_setting.delete
+    end
+  end
+
+  def down
+    preview_local = Setting['timeline_preview_local']
+    preview_remote = Setting['timeline_preview_remote']
+
+    unless preview_local.nil? && preview_remote.nil?
+      preview_timelines = (!preview_local.nil? && preview_local) && (!preview_remote.nil? && preview_remote)
+      Setting['timeline_preview'] = preview_timelines
+    end
+
+    Setting.where(var: ['timeline_preview_local', 'timeline_preview_remote']).delete_all
+  end
+end