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 final class StickerPackUrl {
  15
  16     private final StickerPackId packId;
  17     private final byte[] packKey;
  18
  19     /**
  20      * @throws InvalidStickerPackLinkException If url cannot be parsed.
  21      */
  22     public static StickerPackUrl fromUri(URI uri) throws InvalidStickerPackLinkException {
  23         final var rawQuery = uri.getRawFragment();
  24         if (isEmpty(rawQuery)) {
  25             throw new InvalidStickerPackLinkException("Invalid sticker pack uri");
  26         }
  27
  28         var query = Utils.getQueryMap(rawQuery);
  29         var packIdString = query.get("pack_id");
  30         var packKeyString = query.get("pack_key");
  31
  32         if (isEmpty(packIdString) || isEmpty(packKeyString)) {
  33             throw new InvalidStickerPackLinkException("Incomplete sticker pack uri");
  34         }
  35
  36         StickerPackId packId;
  37         try {
  38             packId = StickerPackId.deserialize(Hex.fromStringCondensed(packIdString));
  39         } catch (IOException e) {
  40             throw new InvalidStickerPackLinkException("Invalid sticker pack", e);
  41         }
  42         final byte[] packKey;
  43         try {
  44             packKey = Hex.fromStringCondensed(packKeyString);
  45         } catch (IOException e) {
  46             throw new InvalidStickerPackLinkException("Invalid sticker pack uri", e);
  47         }
  48         return new StickerPackUrl(packId, packKey);
  49     }
  50
  51     public StickerPackUrl(final StickerPackId packId, final byte[] packKey) {
  52         this.packId = packId;
  53         this.packKey = packKey;
  54     }
  55
  56     public URI getUrl() {
  57         try {
  58             return new URI("https",
  59                     "signal.art",
  60                     "/addstickers/",
  61                     "pack_id="
  62                             + URLEncoder.encode(Hex.toStringCondensed(packId.serialize()), StandardCharsets.UTF_8)
  63                             + "&pack_key="
  64                             + URLEncoder.encode(Hex.toStringCondensed(packKey), StandardCharsets.UTF_8));
  65         } catch (URISyntaxException e) {
  66             throw new AssertionError(e);
  67         }
  68     }
  69
  70     public StickerPackId getPackId() {
  71         return packId;
  72     }
  73
  74     public byte[] getPackKey() {
  75         return packKey;
  76     }
  77
  78     public final static class InvalidStickerPackLinkException extends Exception {
  79
  80         public InvalidStickerPackLinkException(String message) {
  81             super(message);
  82         }
  83
  84         public InvalidStickerPackLinkException(final String message, final Throwable cause) {
  85             super(message, cause);
  86         }
  87     }
  88 }