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zheng framework module: job support by quartz
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package com.github.zhengframework.job;

/*-
 * #%L
 * zheng-job
 * %%
 * Copyright (C) 2020 Zheng MingHai
 * %%
 * 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.
 * #L%
 */

import java.util.regex.Matcher;
import java.util.regex.Pattern;

/*
 * This code is ripped of the playframework, see original here
 * https://github.com/playframework/play/blob/master/framework/src/play/libs/Time.java
 */
public class TimeParserUtil {

  private static Pattern days = Pattern.compile("^([0-9]+)d$");
  private static Pattern hours = Pattern.compile("^([0-9]+)h$");
  private static Pattern minutes = Pattern.compile("^([0-9]+)mi?n$");
  private static Pattern seconds = Pattern.compile("^([0-9]+)s$");
  private static Pattern milliseconds = Pattern.compile("^([0-9]+)ms$");

  /**
   * Parse a duration
   *
   * @param duration 1d, 3h, 2mn, 7s, 50ms
   * @return The number of milliseconds
   */
  public static long parseDuration(String duration) {
    if (duration == null || duration.isEmpty()) {
      throw new IllegalArgumentException("duration may not be null");
    }
    long toAdd = -1;
    if (days.matcher(duration).matches()) {
      Matcher matcher = days.matcher(duration);
      matcher.matches();
      toAdd = Long.parseLong(matcher.group(1)) * 60 * 60 * 24 * 1000;
    } else if (hours.matcher(duration).matches()) {
      Matcher matcher = hours.matcher(duration);
      matcher.matches();
      toAdd = Long.parseLong(matcher.group(1)) * 60 * 60 * 1000;
    } else if (minutes.matcher(duration).matches()) {
      Matcher matcher = minutes.matcher(duration);
      matcher.matches();
      toAdd = Long.parseLong(matcher.group(1)) * 60 * 1000;
    } else if (seconds.matcher(duration).matches()) {
      Matcher matcher = seconds.matcher(duration);
      matcher.matches();
      toAdd = Long.parseLong(matcher.group(1)) * 1000;
    } else if (milliseconds.matcher(duration).matches()) {
      Matcher matcher = milliseconds.matcher(duration);
      matcher.matches();
      toAdd = Long.parseLong(matcher.group(1));
    }
    if (toAdd == -1) {
      throw new IllegalArgumentException("Invalid duration pattern : " + duration);
    }
    return toAdd;
  }
}