nmode's Git Repositories - signal-cli/blob - src/main/java/org/asamk/signal/util/Util.java

   1 package org.asamk.signal.util;
   2
   3 import com.fasterxml.jackson.databind.JsonNode;
   4 import org.asamk.signal.GroupIdFormatException;
   5 import org.whispersystems.signalservice.internal.util.Base64;
   6
   7 import java.io.IOException;
   8 import java.io.InvalidObjectException;
   9
  10 public class Util {
  11
  12     private Util() {
  13     }
  14
  15     public static String formatSafetyNumber(String digits) {
  16         final int partCount = 12;
  17         int partSize = digits.length() / partCount;
  18         StringBuilder f = new StringBuilder(digits.length() + partCount);
  19         for (int i = 0; i < partCount; i++) {
  20             f.append(digits, i * partSize, (i * partSize) + partSize).append(" ");
  21         }
  22         return f.toString();
  23     }
  24
  25     public static String join(CharSequence separator, Iterable<? extends CharSequence> list) {
  26         StringBuilder buf = new StringBuilder();
  27         for (CharSequence str : list) {
  28             if (buf.length() > 0) {
  29                 buf.append(separator);
  30             }
  31             buf.append(str);
  32         }
  33
  34         return buf.toString();
  35     }
  36
  37     public static JsonNode getNotNullNode(JsonNode parent, String name) throws InvalidObjectException {
  38         JsonNode node = parent.get(name);
  39         if (node == null) {
  40             throw new InvalidObjectException(String.format("Incorrect file format: expected parameter %s not found ", name));
  41         }
  42
  43         return node;
  44     }
  45
  46     public static byte[] decodeGroupId(String groupId) throws GroupIdFormatException {
  47         try {
  48             return Base64.decode(groupId);
  49         } catch (IOException e) {
  50             throw new GroupIdFormatException(groupId, e);
  51         }
  52     }
  53 }