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         @Override
  53         public Executable<Boolean> byIdentifier(String identifier) {
  54                 nodeIdentifier.set(identifier);
  55                 return this::execute;
  56         }
  57
  58         @Override
  59         public Executable<Boolean> byHostAndPort(String host, int port) {
  60                 nodeIdentifier.set(String.format("%s:%d", host, port));
  61                 return this::execute;
  62         }
  63
  64         private ListenableFuture<Boolean> execute() {
  65                 if (darknetComment.get() == null) {
  66                         return Futures.immediateFuture(false);
  67                 }
  68                 return threadPool.submit(this::executeDialog);
  69         }
  70
  71         private Boolean executeDialog() throws IOException, ExecutionException, InterruptedException {
  72                 ModifyPeerNote modifyPeerNote =
  73                         new ModifyPeerNote(RANDOM_IDENTIFIER_GENERATOR.generate(), nodeIdentifier.get());
  74                 modifyPeerNote.setPeerNoteType(PeerNoteType.PRIVATE_DARKNET_COMMENT);
  75                 modifyPeerNote.setNoteText(BASE_64.encode(darknetComment.get().getBytes(StandardCharsets.UTF_8)));
  76                 try (ModifyPeerNoteDialog modifyPeerNoteDialog = new ModifyPeerNoteDialog()) {
  77                         return modifyPeerNoteDialog.send(modifyPeerNote).get();
  78                 }
  79         }
  80
  81         private class ModifyPeerNoteDialog extends FcpDialog<Boolean> {
  82
  83                 private final AtomicBoolean finished = new AtomicBoolean();
  84                 private final AtomicBoolean successful = new AtomicBoolean();
  85
  86                 public ModifyPeerNoteDialog() throws IOException {
  87                         super(threadPool, connectionSupplier.get());
  88                 }
  89
  90                 @Override
  91                 protected boolean isFinished() {
  92                         return finished.get();
  93                 }
  94
  95                 @Override
  96                 protected Boolean getResult() {
  97                         return successful.get();
  98                 }
  99
 100                 @Override
 101                 protected void consumePeerNote(PeerNote peerNote) {
 102                         successful.set(true);
 103                         finished.set(true);
 104                 }
 105
 106                 @Override
 107                 protected void consumeUnknownNodeIdentifier(UnknownNodeIdentifier unknownNodeIdentifier) {
 108                         finished.set(true);
 109                 }
 110
 111         }
 112
 113 }