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.AtomicReference;
   8 import java.util.function.Supplier;
   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 final ListeningExecutorService threadPool;
  30         private final ConnectionSupplier connectionSupplier;
  31         private final Supplier<String> identifierGenerator;
  32         private final AtomicReference<String> nodeIdentifier = new AtomicReference<>();
  33         private final AtomicReference<String> darknetComment = new AtomicReference<>();
  34
  35         public ModifyPeerNoteCommandImpl(ExecutorService threadPool, ConnectionSupplier connectionSupplier, Supplier<String> identifierGenerator) {
  36                 this.threadPool = MoreExecutors.listeningDecorator(threadPool);
  37                 this.connectionSupplier = connectionSupplier;
  38                 this.identifierGenerator = identifierGenerator;
  39         }
  40
  41         @Override
  42         public ModifyPeerNoteCommand darknetComment(String text) {
  43                 darknetComment.set(text);
  44                 return this;
  45         }
  46
  47         @Override
  48         public Executable<Boolean> byName(String name) {
  49                 nodeIdentifier.set(name);
  50                 return this::execute;
  51         }
  52
  53         @Override
  54         public Executable<Boolean> byIdentifier(String identifier) {
  55                 nodeIdentifier.set(identifier);
  56                 return this::execute;
  57         }
  58
  59         @Override
  60         public Executable<Boolean> byHostAndPort(String host, int port) {
  61                 nodeIdentifier.set(String.format("%s:%d", host, port));
  62                 return this::execute;
  63         }
  64
  65         private ListenableFuture<Boolean> execute() {
  66                 if (darknetComment.get() == null) {
  67                         return Futures.immediateFuture(false);
  68                 }
  69                 return threadPool.submit(this::executeDialog);
  70         }
  71
  72         private Boolean executeDialog() throws IOException, ExecutionException, InterruptedException {
  73                 ModifyPeerNote modifyPeerNote =
  74                         new ModifyPeerNote(identifierGenerator.get(), nodeIdentifier.get());
  75                 modifyPeerNote.setPeerNoteType(PeerNoteType.PRIVATE_DARKNET_COMMENT);
  76                 modifyPeerNote.setNoteText(BASE_64.encode(darknetComment.get().getBytes(StandardCharsets.UTF_8)));
  77                 try (ModifyPeerNoteDialog modifyPeerNoteDialog = new ModifyPeerNoteDialog()) {
  78                         return modifyPeerNoteDialog.send(modifyPeerNote).get();
  79                 }
  80         }
  81
  82         private class ModifyPeerNoteDialog extends FcpDialog<Boolean> {
  83
  84                 public ModifyPeerNoteDialog() throws IOException {
  85                         super(threadPool, connectionSupplier.get(), false);
  86                 }
  87
  88                 @Override
  89                 protected void consumePeerNote(PeerNote peerNote) {
  90                         setResult(true);
  91                 }
  92
  93                 @Override
  94                 protected void consumeUnknownNodeIdentifier(UnknownNodeIdentifier unknownNodeIdentifier) {
  95                         finish();
  96                 }
  97
  98         }
  99
 100 }