nmode's Git Repositories - signal-cli/blob - lib/src/main/java/org/asamk/signal/manager/api/StickerPackUrl.java

   1 package org.asamk.signal.manager.api;
   2
   3 import org.asamk.signal.manager.util.Utils;
   4 import org.whispersystems.signalservice.internal.util.Hex;
   5
   6 import java.io.IOException;
   7 import java.net.URI;
   8 import java.net.URISyntaxException;
   9 import java.net.URLEncoder;
  10 import java.nio.charset.StandardCharsets;
  11
  12 import static org.whispersystems.signalservice.internal.util.Util.isEmpty;
  13
  14 public record StickerPackUrl(StickerPackId packId, byte[] packKey) {
  15
  16     /**
  17      * @throws InvalidStickerPackLinkException If url cannot be parsed.
  18      */
  19     public static StickerPackUrl fromUri(URI uri) throws InvalidStickerPackLinkException {
  20         final var rawQuery = uri.getRawFragment();
  21         if (isEmpty(rawQuery)) {
  22             throw new InvalidStickerPackLinkException("Invalid sticker pack uri");
  23         }
  24
  25         var query = Utils.getQueryMap(rawQuery);
  26         var packIdString = query.get("pack_id");
  27         var packKeyString = query.get("pack_key");
  28
  29         if (isEmpty(packIdString) || isEmpty(packKeyString)) {
  30             throw new InvalidStickerPackLinkException("Incomplete sticker pack uri");
  31         }
  32
  33         StickerPackId packId;
  34         try {
  35             packId = StickerPackId.deserialize(Hex.fromStringCondensed(packIdString));
  36         } catch (IOException e) {
  37             throw new InvalidStickerPackLinkException("Invalid sticker pack", e);
  38         }
  39         final byte[] packKey;
  40         try {
  41             packKey = Hex.fromStringCondensed(packKeyString);
  42         } catch (IOException e) {
  43             throw new InvalidStickerPackLinkException("Invalid sticker pack uri", e);
  44         }
  45         return new StickerPackUrl(packId, packKey);
  46     }
  47
  48     public URI getUrl() {
  49         try {
  50             return new URI("https",
  51                     "signal.art",
  52                     "/addstickers/",
  53                     "pack_id="
  54                             + URLEncoder.encode(Hex.toStringCondensed(packId.serialize()), StandardCharsets.UTF_8)
  55                             + "&pack_key="
  56                             + URLEncoder.encode(Hex.toStringCondensed(packKey), StandardCharsets.UTF_8));
  57         } catch (URISyntaxException e) {
  58             throw new AssertionError(e);
  59         }
  60     }
  61
  62     public static final class InvalidStickerPackLinkException extends Exception {
  63
  64         public InvalidStickerPackLinkException(String message) {
  65             super(message);
  66         }
  67
  68         public InvalidStickerPackLinkException(final String message, final Throwable cause) {
  69             super(message, cause);
  70         }
  71     }
  72 }