X-Git-Url: https://git.nmode.ca/signal-cli/blobdiff_plain/4ab904b88e0b445c5e886fe91add69fb215dd455..0624d6a808b8b2a247aadd96450319bc94e3729f:/src/main/java/org/asamk/signal/util/Util.java

diff --git a/src/main/java/org/asamk/signal/util/Util.java b/src/main/java/org/asamk/signal/util/Util.java
index c0efd271..92bfae7b 100644
--- a/src/main/java/org/asamk/signal/util/Util.java
+++ b/src/main/java/org/asamk/signal/util/Util.java
@@ -1,10 +1,24 @@
 package org.asamk.signal.util;
 
-import java.io.File;
-import java.io.IOException;
+import org.asamk.signal.manager.groups.GroupId;
+import org.asamk.signal.manager.groups.GroupIdFormatException;
 
 public class Util {
-    public static File createTempFile() throws IOException {
-        return File.createTempFile("signal_tmp_", ".tmp");
+
+    private Util() {
+    }
+
+    public static String formatSafetyNumber(String digits) {
+        final int partCount = 12;
+        int partSize = digits.length() / partCount;
+        StringBuilder f = new StringBuilder(digits.length() + partCount);
+        for (int i = 0; i < partCount; i++) {
+            f.append(digits, i * partSize, (i * partSize) + partSize).append(" ");
+        }
+        return f.toString();
+    }
+
+    public static GroupId decodeGroupId(String groupId) throws GroupIdFormatException {
+        return GroupId.fromBase64(groupId);
     }
 }