X-Git-Url: https://git.argeo.org/?a=blobdiff_plain;f=org.argeo.util%2Fsrc%2Forg%2Fargeo%2Futil%2FLangUtils.java;h=b791f490d10dbf1146450d3b17a7eeac08927bdc;hb=b45e59192a4bb34a6b38a9bfa416b3dc3f6b7892;hp=fae6312343d0b99c267298bbecdf8567c6228fc8;hpb=44728c14306ddf25bb5225496de5f44345fab85d;p=lgpl%2Fargeo-commons.git

diff --git a/org.argeo.util/src/org/argeo/util/LangUtils.java b/org.argeo.util/src/org/argeo/util/LangUtils.java
index fae631234..b791f490d 100644
--- a/org.argeo.util/src/org/argeo/util/LangUtils.java
+++ b/org.argeo.util/src/org/argeo/util/LangUtils.java
@@ -7,6 +7,9 @@ import java.io.Writer;
 import java.nio.file.Files;
 import java.nio.file.Path;
 import java.nio.file.StandardOpenOption;
+import java.time.ZonedDateTime;
+import java.time.temporal.ChronoUnit;
+import java.time.temporal.Temporal;
 import java.util.Dictionary;
 import java.util.Enumeration;
 import java.util.Hashtable;
@@ -157,6 +160,30 @@ public class LangUtils {
 			chainCauseMessage(buf, t.getCause());
 	}
 
+	/*
+	 * TIME
+	 */
+	/** Formats time elapsed since start. */
+	public static String since(ZonedDateTime start) {
+		ZonedDateTime now = ZonedDateTime.now();
+		return duration(start, now);
+	}
+
+	/** Formats a duration. */
+	public static String duration(Temporal start, Temporal end) {
+		long count = ChronoUnit.DAYS.between(start, end);
+		if (count != 0)
+			return count > 1 ? count + " days" : count + " day";
+		count = ChronoUnit.HOURS.between(start, end);
+		if (count != 0)
+			return count > 1 ? count + " hours" : count + " hours";
+		count = ChronoUnit.MINUTES.between(start, end);
+		if (count != 0)
+			return count > 1 ? count + " minutes" : count + " minute";
+		count = ChronoUnit.SECONDS.between(start, end);
+		return count > 1 ? count + " seconds" : count + " second";
+	}
+
 	/** Singleton constructor. */
 	private LangUtils() {