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   1 /**
   2  * Copyright (c) 2010-2023 Contributors to the openHAB project
   3  *
   4  * See the NOTICE file(s) distributed with this work for additional
   5  * information.
   6  *
   7  * This program and the accompanying materials are made available under the
   8  * terms of the Eclipse Public License 2.0 which is available at
   9  * http://www.eclipse.org/legal/epl-2.0
  10  *
  11  * SPDX-License-Identifier: EPL-2.0
  12  */
  13 package org.openhab.binding.mikrotik.internal.util;
  14
  15 import java.time.LocalDateTime;
  16 import java.time.format.DateTimeFormatter;
  17 import java.time.temporal.ChronoField;
  18 import java.util.Locale;
  19 import java.util.regex.Matcher;
  20 import java.util.regex.Pattern;
  21
  22 import org.eclipse.jdt.annotation.NonNullByDefault;
  23 import org.eclipse.jdt.annotation.Nullable;
  24
  25 /**
  26  * The {@link Converter} is a utility class having functions to convert RouterOS-specific data representation strings
  27  * to regular Java types.
  28  *
  29  * @author Oleg Vivtash - Initial contribution
  30  */
  31 @NonNullByDefault
  32 public class Converter {
  33     private static final DateTimeFormatter ROUTEROS_FORMAT = DateTimeFormatter.ofPattern("MMM/dd/yyyy kk:mm:ss",
  34             Locale.ENGLISH);
  35
  36     private static final Pattern PERIOD_PATTERN = Pattern.compile("(\\d+)([a-z]+){1,3}");
  37
  38     public @Nullable static LocalDateTime fromRouterosTime(@Nullable String dateTimeString) {
  39         if (dateTimeString == null) {
  40             return null;
  41         }
  42         String fixedTs = dateTimeString.substring(0, 1).toUpperCase() + dateTimeString.substring(1);
  43         return LocalDateTime.parse(fixedTs, ROUTEROS_FORMAT);
  44     }
  45
  46     public @Nullable static LocalDateTime routerosPeriodBack(@Nullable String durationString) {
  47         return routerosPeriodBack(durationString, LocalDateTime.now());
  48     }
  49
  50     public @Nullable static LocalDateTime routerosPeriodBack(@Nullable String durationString,
  51             LocalDateTime fromDateTime) {
  52         if (durationString == null) {
  53             return null;
  54         }
  55
  56         Matcher m = PERIOD_PATTERN.matcher(durationString);
  57         LocalDateTime ts = fromDateTime;
  58         while (m.find()) {
  59             int amount = Integer.parseInt(m.group(1));
  60             String periodKey = m.group(2);
  61             switch (periodKey) {
  62                 case "y":
  63                     ts = ts.minusYears(amount);
  64                     break;
  65                 case "w":
  66                     ts = ts.minusWeeks(amount);
  67                     break;
  68                 case "d":
  69                     ts = ts.minusDays(amount);
  70                     break;
  71                 case "h":
  72                     ts = ts.minusHours(amount);
  73                     break;
  74                 case "m":
  75                     ts = ts.minusMinutes(amount);
  76                     break;
  77                 case "s":
  78                     ts = ts.minusSeconds(amount);
  79                     break;
  80                 case "ms":
  81                     ts = ts.plus(amount, ChronoField.MILLI_OF_SECOND.getBaseUnit());
  82                     break;
  83                 default:
  84                     throw new IllegalArgumentException(
  85                             String.format("Unable to parse duration %s - %s is unknown", durationString, periodKey));
  86             }
  87         }
  88         return ts;
  89     }
  90 }