Revamp notification policy options (#31343)

db/migrate/20240808114841_add_new_notification_policies.rb

@@ -0,0 +1,11 @@
+# frozen_string_literal: true
+
+class AddNewNotificationPolicies < ActiveRecord::Migration[7.1]
+  def change
+    add_column :notification_policies, :for_not_following, :integer, default: 0, null: false
+    add_column :notification_policies, :for_not_followers, :integer, default: 0, null: false
+    add_column :notification_policies, :for_new_accounts, :integer, default: 0, null: false
+    add_column :notification_policies, :for_private_mentions, :integer, default: 1, null: false
+    add_column :notification_policies, :for_limited_accounts, :integer, default: 1, null: false
+  end
+end

db/migrate/20240808124338_migrate_notifications_policy_v2.rb

@@ -0,0 +1,26 @@
+# frozen_string_literal: true
+
+class MigrateNotificationsPolicyV2 < ActiveRecord::Migration[7.1]
+  disable_ddl_transaction!
+
+  # Dummy classes, to make migration possible across version changes
+  class NotificationPolicy < ApplicationRecord; end
+
+  def up
+    NotificationPolicy.in_batches.update_all(<<~SQL.squish)
+      for_not_following = CASE filter_not_following WHEN true THEN 1 ELSE 0 END,
+      for_not_followers = CASE filter_not_following WHEN true THEN 1 ELSE 0 END,
+      for_new_accounts = CASE filter_new_accounts WHEN true THEN 1 ELSE 0 END,
+      for_private_mentions = CASE filter_private_mentions WHEN true THEN 1 ELSE 0 END
+    SQL
+  end
+
+  def down
+    NotificationPolicy.in_batches.update_all(<<~SQL.squish)
+      filter_not_following = CASE for_not_following WHEN 0 THEN false ELSE true END,
+      filter_not_following = CASE for_not_followers WHEN 0 THEN false ELSE true END,
+      filter_new_accounts = CASE for_new_accounts WHEN 0 THEN false ELSE true END,
+      filter_private_mentions = CASE for_private_mentions WHEN 0 THEN false ELSE true END
+    SQL
+  end
+end