Add relative punishment times

src/de/steamwar/bungeecore/commands/PunishmentCommand.java

@@ -30,7 +30,10 @@ import java.sql.Timestamp;
 import java.text.ParseException;
 import java.text.SimpleDateFormat;
 import java.time.Instant;
+import java.time.temporal.ChronoUnit;
 import java.util.Date;
+import java.util.regex.MatchResult;
+import java.util.regex.Pattern;
 
 public class PunishmentCommand {
 
@@ -96,10 +99,39 @@ public class PunishmentCommand {
         return target;
     }
 
+    private static Pattern RELATIVE_PATTERN = Pattern.compile("([1-9]\\d*[hdwmy])+");
+
     public static Timestamp parseTime(CommandSender sender, String arg) {
         if (arg.equalsIgnoreCase("perma")) {
             return Punishment.PERMA_TIME;
         } else {
+            MatchResult matchResult = RELATIVE_PATTERN.matcher(arg).toMatchResult();
+            if (matchResult.groupCount() > 0) {
+                Instant instant = Instant.now();
+                for (int i = 1; i < matchResult.groupCount(); i++) {
+                    String group = matchResult.group(i);
+                    int amount = Integer.parseInt(group.substring(0, group.length() - 1));
+                    char unit = Character.toLowerCase(group.charAt(group.length() - 1));
+                    switch (unit) {
+                        case 'h':
+                            instant = instant.plus(amount, ChronoUnit.HOURS);
+                            break;
+                        case 'd':
+                            instant = instant.plus(amount, ChronoUnit.DAYS);
+                            break;
+                        case 'w':
+                            instant = instant.plus(amount, ChronoUnit.WEEKS);
+                            break;
+                        case 'm':
+                            instant = instant.plus(amount, ChronoUnit.MONTHS);
+                            break;
+                        case 'y':
+                            instant = instant.plus(amount, ChronoUnit.YEARS);
+                            break;
+                    }
+                }
+                return Timestamp.from(instant);
+            }
             SimpleDateFormat dateFormat = new SimpleDateFormat("dd.MM.yyyy_HH:mm");
             try {
                 Date parsedDate = dateFormat.parse(arg);