Add support for local quote stamps (#35626)

app/controllers/activitypub/quote_authorizations_controller.rb

@@ -0,0 +1,28 @@
+# frozen_string_literal: true
+
+class ActivityPub::QuoteAuthorizationsController < ActivityPub::BaseController
+  include Authorization
+
+  vary_by -> { 'Signature' if authorized_fetch_mode? }
+
+  before_action :require_account_signature!, if: :authorized_fetch_mode?
+  before_action :set_quote_authorization
+
+  def show
+    expires_in 0, public: @quote.status.distributable? && public_fetch_mode?
+    render json: @quote, serializer: ActivityPub::QuoteAuthorizationSerializer, adapter: ActivityPub::Adapter, content_type: 'application/activity+json'
+  end
+
+  private
+
+  def pundit_user
+    signed_request_account
+  end
+
+  def set_quote_authorization
+    @quote = Quote.accepted.where(quoted_account: @account).find(params[:id])
+    authorize @quote.status, :show?
+  rescue Mastodon::NotPermittedError
+    not_found
+  end
+end