Add notification policies and notification requests (#29366)

app/controllers/api/v1/notifications/policies_controller.rb

@@ -0,0 +1,37 @@
+# frozen_string_literal: true
+
+class Api::V1::Notifications::PoliciesController < Api::BaseController
+  before_action -> { doorkeeper_authorize! :read, :'read:notifications' }, only: :show
+  before_action -> { doorkeeper_authorize! :write, :'write:notifications' }, only: :update
+
+  before_action :require_user!
+  before_action :set_policy
+
+  def show
+    render json: @policy, serializer: REST::NotificationPolicySerializer
+  end
+
+  def update
+    @policy.update!(resource_params)
+    render json: @policy, serializer: REST::NotificationPolicySerializer
+  end
+
+  private
+
+  def set_policy
+    @policy = NotificationPolicy.find_or_initialize_by(account: current_account)
+
+    with_read_replica do
+      @policy.summarize!
+    end
+  end
+
+  def resource_params
+    params.permit(
+      :filter_not_following,
+      :filter_not_followers,
+      :filter_new_accounts,
+      :filter_private_mentions
+    )
+  end
+end