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
   5 import org.asamk.signal.GroupIdFormatException;
   6 import org.whispersystems.signalservice.internal.util.Base64;
   7
   8 import java.io.IOException;
   9 import java.io.InvalidObjectException;
  10
  11 public class Util {
  12
  13     private Util() {
  14     }
  15
  16     public static String formatSafetyNumber(String digits) {
  17         final int partCount = 12;
  18         int partSize = digits.length() / partCount;
  19         StringBuilder f = new StringBuilder(digits.length() + partCount);
  20         for (int i = 0; i < partCount; i++) {
  21             f.append(digits, i * partSize, (i * partSize) + partSize).append(" ");
  22         }
  23         return f.toString();
  24     }
  25
  26     public static String join(CharSequence separator, Iterable<? extends CharSequence> list) {
  27         StringBuilder buf = new StringBuilder();
  28         for (CharSequence str : list) {
  29             if (buf.length() > 0) {
  30                 buf.append(separator);
  31             }
  32             buf.append(str);
  33         }
  34
  35         return buf.toString();
  36     }
  37
  38     public static JsonNode getNotNullNode(JsonNode parent, String name) throws InvalidObjectException {
  39         JsonNode node = parent.get(name);
  40         if (node == null) {
  41             throw new InvalidObjectException(String.format("Incorrect file format: expected parameter %s not found ", name));
  42         }
  43
  44         return node;
  45     }
  46
  47     public static byte[] decodeGroupId(String groupId) throws GroupIdFormatException {
  48         try {
  49             return Base64.decode(groupId);
  50         } catch (IOException e) {
  51             throw new GroupIdFormatException(groupId, e);
  52         }
  53     }
  54 }