From 83ba8f02ea105fff93266cb9fd62cd7d7937e61c Mon Sep 17 00:00:00 2001
From: Simon Rettberg
Date: Wed, 9 Oct 2019 17:40:49 +0200
Subject: Util: isEmpty: Use regex; add parseInt

---
 src/main/java/org/openslx/satserver/util/Util.java | 29 ++++++++++++++++++++--
 1 file changed, 27 insertions(+), 2 deletions(-)

diff --git a/src/main/java/org/openslx/satserver/util/Util.java b/src/main/java/org/openslx/satserver/util/Util.java
index 5979603..55dc76b 100644
--- a/src/main/java/org/openslx/satserver/util/Util.java
+++ b/src/main/java/org/openslx/satserver/util/Util.java
@@ -6,6 +6,7 @@ import java.io.IOException;
 import java.io.InputStream;
 import java.io.OutputStream;
 import java.nio.charset.StandardCharsets;
+import java.util.regex.Pattern;
 
 import org.apache.commons.io.FileUtils;
 
@@ -86,10 +87,34 @@ public class Util
 	{
 		return startsWith( dir, DEFAULT_ALLOWED_DIRS );
 	}
+	
+	private static Pattern nonSpaceExp = Pattern.compile( "[^\\p{C}\\p{Z}]" );
 
-	public static boolean isEmpty( String s )
+	/**
+	 * Whether given string is null, empty, or only matches space-like
+	 * characters.
+	 */
+	public static boolean isEmpty( String string )
+	{
+		return string == null || !nonSpaceExp.matcher( string ).find();
+	}
+	
+	/**
+	 * Parse the given String as a base10 integer.
+	 * If the string does not represent a valid integer, return the given
+	 * default value.
+	 * 
+	 * @param value string representation to parse to an int
+	 * @param defaultValue fallback value if given string can't be parsed
+	 * @return
+	 */
+	public static int parseInt( String value, int defaultValue )
 	{
-		return s == null || s.isEmpty();
+		try {
+			return Integer.parseInt( value );
+		} catch ( Exception e ) {
+			return defaultValue;
+		}
 	}
 
 }
-- 
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