nmode's Git Repositories - signal-cli/blob - lib/src/main/java/org/asamk/signal/manager/storage/messageCache/MessageCache.java

   1 package org.asamk.signal.manager.storage.messageCache;
   2
   3 import org.asamk.signal.manager.util.IOUtils;
   4 import org.asamk.signal.manager.util.MessageCacheUtils;
   5 import org.slf4j.Logger;
   6 import org.slf4j.LoggerFactory;
   7 import org.whispersystems.signalservice.api.messages.SignalServiceEnvelope;
   8
   9 import java.io.File;
  10 import java.io.IOException;
  11 import java.nio.file.Files;
  12 import java.util.Arrays;
  13 import java.util.Collections;
  14 import java.util.Date;
  15 import java.util.Objects;
  16 import java.util.stream.Collectors;
  17 import java.util.stream.Stream;
  18
  19 public class MessageCache {
  20
  21     private final static Logger logger = LoggerFactory.getLogger(MessageCache.class);
  22
  23     private final File messageCachePath;
  24
  25     public MessageCache(final File messageCachePath) {
  26         this.messageCachePath = messageCachePath;
  27     }
  28
  29     public Iterable<CachedMessage> getCachedMessages() {
  30         if (!messageCachePath.exists()) {
  31             return Collections.emptyList();
  32         }
  33
  34         return Arrays.stream(Objects.requireNonNull(messageCachePath.listFiles())).flatMap(dir -> {
  35             if (dir.isFile()) {
  36                 return Stream.of(dir);
  37             }
  38
  39             final File[] files = Objects.requireNonNull(dir.listFiles());
  40             if (files.length == 0) {
  41                 try {
  42                     Files.delete(dir.toPath());
  43                 } catch (IOException e) {
  44                     logger.warn("Failed to delete cache dir “{}”, ignoring: {}", dir, e.getMessage());
  45                 }
  46                 return Stream.empty();
  47             }
  48             return Arrays.stream(files).filter(File::isFile);
  49         }).map(CachedMessage::new).collect(Collectors.toList());
  50     }
  51
  52     public CachedMessage cacheMessage(SignalServiceEnvelope envelope) {
  53         final long now = new Date().getTime();
  54         final String source = envelope.hasSource() ? envelope.getSourceAddress().getLegacyIdentifier() : "";
  55
  56         try {
  57             File cacheFile = getMessageCacheFile(source, now, envelope.getTimestamp());
  58             MessageCacheUtils.storeEnvelope(envelope, cacheFile);
  59             return new CachedMessage(cacheFile);
  60         } catch (IOException e) {
  61             logger.warn("Failed to store encrypted message in disk cache, ignoring: {}", e.getMessage());
  62             return null;
  63         }
  64     }
  65
  66     private File getMessageCachePath(String sender) {
  67         if (sender == null || sender.isEmpty()) {
  68             return messageCachePath;
  69         }
  70
  71         return new File(messageCachePath, sender.replace("/", "_"));
  72     }
  73
  74     private File getMessageCacheFile(String sender, long now, long timestamp) throws IOException {
  75         File cachePath = getMessageCachePath(sender);
  76         IOUtils.createPrivateDirectories(cachePath);
  77         return new File(cachePath, now + "_" + timestamp);
  78     }
  79 }