Add Text#fromCSV and Text#toCSV

Signed-off-by: Tomas Slusny <slusnucky@gmail.com>

runelite-client/src/main/java/net/runelite/client/util/Text.java

@@ -26,6 +26,10 @@
 package net.runelite.client.util;
 
 import com.google.common.base.CharMatcher;
+import com.google.common.base.Joiner;
+import com.google.common.base.Splitter;
+import java.util.Collection;
+import java.util.List;
 import java.util.regex.Pattern;
 
 /**
@@ -34,6 +38,34 @@ import java.util.regex.Pattern;
 public class Text
 {
 	private static final Pattern TAG_REGEXP = Pattern.compile("<[^>]*>");
+	private static final Splitter COMMA_SPLITTER = Splitter
+		.on(",")
+		.omitEmptyStrings()
+		.trimResults();
+
+	private static final Joiner COMMA_JOINER = Joiner.on(",").skipNulls();
+
+	/**
+	 * Splits comma separated values to list of strings
+	 *
+	 * @param input input
+	 * @return list of values
+	 */
+	public static List<String> fromCSV(final String input)
+	{
+		return COMMA_SPLITTER.splitToList(input);
+	}
+
+	/**
+	 * Joins collection of strings as comma separated values
+	 *
+	 * @param input collection
+	 * @return comma separated value string
+	 */
+	public static String toCSV(final Collection<String> input)
+	{
+		return COMMA_JOINER.join(input);
+	}
 
 	/**
 	 * Removes all tags from the given string.