+ return strings.get(0) + strings.stream()
+ .skip(1)
+ .filter(s -> s.length() > 0)
+ .map(s -> Character.toUpperCase(s.charAt(0)) + s.substring(1).toLowerCase(Locale.ROOT))
+ .collect(Collectors.joining());
+ }
+
+ public static String formatSafetyNumber(String digits) {
+ final var partCount = 12;
+ var partSize = digits.length() / partCount;
+ var f = new StringBuilder(digits.length() + partCount);
+ for (var 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);
+ }
+
+ public static String getLegacyIdentifier(final SignalServiceAddress address) {
+ return address.getNumber().or(() -> address.getUuid().get().toString());