src/main/java/net/pterodactylus/fcp/quelaton/ModifyPeerNoteCommandImpl.java

   1 package net.pterodactylus.fcp.quelaton;
   2
   3 import java.io.IOException;
   4 import java.nio.charset.StandardCharsets;
   5 import java.util.concurrent.ExecutionException;
   6 import java.util.concurrent.ExecutorService;
   7 import java.util.concurrent.atomic.AtomicBoolean;
   8 import java.util.concurrent.atomic.AtomicReference;
   9
  10 import net.pterodactylus.fcp.FreenetBase64;
  11 import net.pterodactylus.fcp.ModifyPeerNote;
  12 import net.pterodactylus.fcp.PeerNote;
  13 import net.pterodactylus.fcp.PeerNoteType;
  14 import net.pterodactylus.fcp.UnknownNodeIdentifier;
  15
  16 import com.google.common.util.concurrent.Futures;
  17 import com.google.common.util.concurrent.ListenableFuture;
  18 import com.google.common.util.concurrent.ListeningExecutorService;
  19 import com.google.common.util.concurrent.MoreExecutors;
  20
  21 /**
  22  * Default {@link ModifyPeerNoteCommand} implementation based on {@link FcpDialog}.
  23  *
  24  * @author <a href="mailto:bombe@freenetproject.org">David ‘Bombe’ Roden</a>
  25  */
  26 public class ModifyPeerNoteCommandImpl implements ModifyPeerNoteCommand {
  27
  28         private static final FreenetBase64 BASE_64 = new FreenetBase64();
  29         private static final RandomIdentifierGenerator RANDOM_IDENTIFIER_GENERATOR = new RandomIdentifierGenerator();
  30         private final ListeningExecutorService threadPool;
  31         private final ConnectionSupplier connectionSupplier;
  32         private final AtomicReference<String> nodeIdentifier = new AtomicReference<>();
  33         private final AtomicReference<String> darknetComment = new AtomicReference<>();
  34
  35         public ModifyPeerNoteCommandImpl(ExecutorService threadPool, ConnectionSupplier connectionSupplier) {
  36                 this.threadPool = MoreExecutors.listeningDecorator(threadPool);
  37                 this.connectionSupplier = connectionSupplier;
  38         }
  39
  40         @Override
  41         public ModifyPeerNoteCommand darknetComment(String text) {
  42                 darknetComment.set(text);
  43                 return this;
  44         }
  45
  46         @Override
  47         public Executable<Boolean> byName(String name) {
  48                 nodeIdentifier.set(name);
  49                 return this::execute;
  50         }
  51
  52         private ListenableFuture<Boolean> execute() {
  53                 if (darknetComment.get() == null) {
  54                         return Futures.immediateFuture(false);
  55                 }
  56                 return threadPool.submit(this::executeDialog);
  57         }
  58
  59         private Boolean executeDialog() throws IOException, ExecutionException, InterruptedException {
  60                 ModifyPeerNote modifyPeerNote =
  61                         new ModifyPeerNote(RANDOM_IDENTIFIER_GENERATOR.generate(), nodeIdentifier.get());
  62                 modifyPeerNote.setPeerNoteType(PeerNoteType.PRIVATE_DARKNET_COMMENT);
  63                 modifyPeerNote.setNoteText(BASE_64.encode(darknetComment.get().getBytes(StandardCharsets.UTF_8)));
  64                 try (ModifyPeerNoteDialog modifyPeerNoteDialog = new ModifyPeerNoteDialog()) {
  65                         return modifyPeerNoteDialog.send(modifyPeerNote).get();
  66                 }
  67         }
  68
  69         private class ModifyPeerNoteDialog extends FcpDialog<Boolean> {
  70
  71                 private final AtomicBoolean finished = new AtomicBoolean();
  72                 private final AtomicBoolean successful = new AtomicBoolean();
  73
  74                 public ModifyPeerNoteDialog() throws IOException {
  75                         super(threadPool, connectionSupplier.get());
  76                 }
  77
  78                 @Override
  79                 protected boolean isFinished() {
  80                         return finished.get();
  81                 }
  82
  83                 @Override
  84                 protected Boolean getResult() {
  85                         return successful.get();
  86                 }
  87
  88                 @Override
  89                 protected void consumePeerNote(PeerNote peerNote) {
  90                         successful.set(true);
  91                         finished.set(true);
  92                 }
  93
  94                 @Override
  95                 protected void consumeUnknownNodeIdentifier(UnknownNodeIdentifier unknownNodeIdentifier) {
  96                         finished.set(true);
  97                 }
  98
  99         }
 100
 101 }