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deep_linking_util.rb
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# frozen_string_literal: true # # Copyright (C) 2021 - present Instructure, Inc. # # This file is part of Canvas. # # Canvas is free software: you can redistribute it and/or modify it under # the terms of the GNU Affero General Public License as published by the Free # Software Foundation, version 3 of the License. # # Canvas is distributed in the hope that it will be useful, but WITHOUT ANY # WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR # A PARTICULAR PURPOSE. See the GNU Affero General Public License for more # details. # # You should have received a copy of the GNU Affero General Public License along # with this program. If not, see <http://www.gnu.org/licenses/>. # # Shared utilities for deep linking responses. module Lti module DeepLinkingUtil module_function def validate_custom_params(custom) custom = JSON.parse(custom) if custom.is_a?(String) return nil unless custom.is_a?(Hash) custom .select { |k, _v| k.is_a?(String) || k.is_a?(Symbol) } .select { |_k, v| valid_custom_params_value?(v) } .stringify_keys rescue JSON::ParserError nil end def valid_custom_params?(custom) custom = JSON.parse(custom) if custom.is_a?(String) custom.is_a?(Hash) && custom.all? { |_, value| valid_custom_params_value?(value) } rescue JSON::ParserError false end def valid_custom_params_value?(val) case val when String, Numeric, true, false, nil true else false end end end end