Fix suspended users being able to access APIs that don't require a user (#18524)

app/controllers/activitypub/base_controller.rb

@@ -2,6 +2,7 @@
 
 class ActivityPub::BaseController < Api::BaseController
   skip_before_action :require_authenticated_user!
+  skip_before_action :require_not_suspended!
   skip_around_action :set_locale
 
   private

app/controllers/api/base_controller.rb

@@ -11,6 +11,7 @@ class Api::BaseController < ApplicationController
   skip_before_action :require_functional!, unless: :whitelist_mode?
 
   before_action :require_authenticated_user!, if: :disallow_unauthenticated_api_access?
+  before_action :require_not_suspended!
   before_action :set_cache_headers
 
   protect_from_forgery with: :null_session
@@ -97,6 +98,10 @@ class Api::BaseController < ApplicationController
     render json: { error: 'This method requires an authenticated user' }, status: 401 unless current_user
   end
 
+  def require_not_suspended!
+    render json: { error: 'Your login is currently disabled' }, status: 403 if current_user&.account&.suspended?
+  end
+
   def require_user!
     if !current_user
       render json: { error: 'This method requires an authenticated user' }, status: 422