/* Copyright 2021 Mozilla Foundation
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

function getInteger({ data, defaultValue, validate }) {
  if (!data) {
    return defaultValue;
  }
  data = data.trim();
  const n = parseInt(data, 10);
  if (!isNaN(n) && validate(n)) {
    return n;
  }
  return defaultValue;
}

function getKeyword({ data, defaultValue, validate }) {
  if (!data) {
    return defaultValue;
  }
  data = data.trim();
  if (validate(data)) {
    return data;
  }
  return defaultValue;
}

function getStringOption(data, options) {
  return getKeyword({
    data,
    defaultValue: options[0],
    validate: k => options.includes(k),
  });
}

export { getInteger, getKeyword, getStringOption };