From f50bd3d6d93f0a81853275feb1c6de79adb0d2fc Mon Sep 17 00:00:00 2001
From: David Roetzel <david@roetzel.de>
Date: Tue, 25 Feb 2025 11:01:26 +0100
Subject: [PATCH] Put FASP support behind a feature flag

---
 app/models/account.rb   |  2 +-
 app/models/favourite.rb |  2 +-
 app/models/status.rb    |  2 +-
 config/application.rb   |  1 +
 config/navigation.rb    |  2 +-
 config/routes.rb        |  2 +-
 lib/mastodon/feature.rb | 11 +++++++++++
 7 files changed, 17 insertions(+), 5 deletions(-)
 create mode 100644 lib/mastodon/feature.rb

diff --git a/app/models/account.rb b/app/models/account.rb
index e46b9e9e6f..f9feeebcd5 100644
--- a/app/models/account.rb
+++ b/app/models/account.rb
@@ -85,7 +85,7 @@ class Account < ApplicationRecord
   include Account::Associations
   include Account::Avatar
   include Account::Counters
-  include Account::FaspConcern
+  include Account::FaspConcern if Mastodon::Feature.fasp_enabled?
   include Account::FinderConcern
   include Account::Header
   include Account::Interactions
diff --git a/app/models/favourite.rb b/app/models/favourite.rb
index 7bf793e2a1..1731ac0d03 100644
--- a/app/models/favourite.rb
+++ b/app/models/favourite.rb
@@ -13,7 +13,7 @@
 
 class Favourite < ApplicationRecord
   include Paginable
-  include Favourite::FaspConcern
+  include Favourite::FaspConcern if Mastodon::Feature.fasp_enabled?
 
   update_index('statuses', :status)
 
diff --git a/app/models/status.rb b/app/models/status.rb
index 8fe07a4a66..2d19dde04b 100644
--- a/app/models/status.rb
+++ b/app/models/status.rb
@@ -34,7 +34,7 @@ class Status < ApplicationRecord
   include Discard::Model
   include Paginable
   include RateLimitable
-  include Status::FaspConcern
+  include Status::FaspConcern if Mastodon::Feature.fasp_enabled?
   include Status::SafeReblogInsert
   include Status::SearchConcern
   include Status::SnapshotConcern
diff --git a/config/application.rb b/config/application.rb
index 92976e87ab..93e4e77e42 100644
--- a/config/application.rb
+++ b/config/application.rb
@@ -34,6 +34,7 @@ require_relative '../lib/paperclip/transcoder'
 require_relative '../lib/paperclip/type_corrector'
 require_relative '../lib/paperclip/response_with_limit_adapter'
 require_relative '../lib/terrapin/multi_pipe_extensions'
+require_relative '../lib/mastodon/feature'
 require_relative '../lib/mastodon/snowflake'
 require_relative '../lib/mastodon/version'
 require_relative '../lib/mastodon/rack_middleware'
diff --git a/config/navigation.rb b/config/navigation.rb
index 942f037dce..d60f8cbc5b 100644
--- a/config/navigation.rb
+++ b/config/navigation.rb
@@ -73,7 +73,7 @@ SimpleNavigation::Configuration.run do |navigation|
       s.item :announcements, safe_join([material_symbol('campaign'), t('admin.announcements.title')]), admin_announcements_path, highlights_on: %r{/admin/announcements}, if: -> { current_user.can?(:manage_announcements) }
       s.item :custom_emojis, safe_join([material_symbol('mood'), t('admin.custom_emojis.title')]), admin_custom_emojis_path, highlights_on: %r{/admin/custom_emojis}, if: -> { current_user.can?(:manage_custom_emojis) }
       s.item :webhooks, safe_join([material_symbol('inbox'), t('admin.webhooks.title')]), admin_webhooks_path, highlights_on: %r{/admin/webhooks}, if: -> { current_user.can?(:manage_webhooks) }
-      s.item :fasp, safe_join([material_symbol('extension'), t('admin.fasp.title')]), admin_fasp_providers_path, highlights_on: %r{/admin/fasp}, if: -> { current_user.can?(:manage_federation) }
+      s.item :fasp, safe_join([material_symbol('extension'), t('admin.fasp.title')]), admin_fasp_providers_path, highlights_on: %r{/admin/fasp}, if: -> { current_user.can?(:manage_federation) } if Mastodon::Feature.fasp_enabled?
       s.item :relays, safe_join([material_symbol('captive_portal'), t('admin.relays.title')]), admin_relays_path, highlights_on: %r{/admin/relays}, if: -> { !limited_federation_mode? && current_user.can?(:manage_federation) }
     end
 
diff --git a/config/routes.rb b/config/routes.rb
index ff321858bb..f06be5f7df 100644
--- a/config/routes.rb
+++ b/config/routes.rb
@@ -196,7 +196,7 @@ Rails.application.routes.draw do
 
   draw(:api)
 
-  draw(:fasp)
+  draw(:fasp) if Mastodon::Feature.fasp_enabled?
 
   draw(:web_app)
 
diff --git a/lib/mastodon/feature.rb b/lib/mastodon/feature.rb
new file mode 100644
index 0000000000..c0e6c00db1
--- /dev/null
+++ b/lib/mastodon/feature.rb
@@ -0,0 +1,11 @@
+# frozen_string_literal: true
+
+module Mastodon
+  module Feature
+    FASP_ENABLED = ENV['EXPERIMENTAL_FASP'] == 'true'
+
+    def self.fasp_enabled?
+      FASP_ENABLED
+    end
+  end
+end