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 import java.util.function.Supplier;
  10
  11 import net.pterodactylus.fcp.FreenetBase64;
  12 import net.pterodactylus.fcp.ModifyPeerNote;
  13 import net.pterodactylus.fcp.PeerNote;
  14 import net.pterodactylus.fcp.PeerNoteType;
  15 import net.pterodactylus.fcp.UnknownNodeIdentifier;
  16
  17 import com.google.common.util.concurrent.Futures;
  18 import com.google.common.util.concurrent.ListenableFuture;
  19 import com.google.common.util.concurrent.ListeningExecutorService;
  20 import com.google.common.util.concurrent.MoreExecutors;
  21
  22 /**
  23  * Default {@link ModifyPeerNoteCommand} implementation based on {@link FcpDialog}.
  24  *
  25  * @author <a href="mailto:bombe@freenetproject.org">David ‘Bombe’ Roden</a>
  26  */
  27 public class ModifyPeerNoteCommandImpl implements ModifyPeerNoteCommand {
  28
  29         private static final FreenetBase64 BASE_64 = new FreenetBase64();
  30         private final ListeningExecutorService threadPool;
  31         private final ConnectionSupplier connectionSupplier;
  32         private final Supplier<String> identifierGenerator;
  33         private final AtomicReference<String> nodeIdentifier = new AtomicReference<>();
  34         private final AtomicReference<String> darknetComment = new AtomicReference<>();
  35
  36         public ModifyPeerNoteCommandImpl(ExecutorService threadPool, ConnectionSupplier connectionSupplier, Supplier<String> identifierGenerator) {
  37                 this.threadPool = MoreExecutors.listeningDecorator(threadPool);
  38                 this.connectionSupplier = connectionSupplier;
  39                 this.identifierGenerator = identifierGenerator;
  40         }
  41
  42         @Override
  43         public ModifyPeerNoteCommand darknetComment(String text) {
  44                 darknetComment.set(text);
  45                 return this;
  46         }
  47
  48         @Override
  49         public Executable<Boolean> byName(String name) {
  50                 nodeIdentifier.set(name);
  51                 return this::execute;
  52         }
  53
  54         @Override
  55         public Executable<Boolean> byIdentifier(String identifier) {
  56                 nodeIdentifier.set(identifier);
  57                 return this::execute;
  58         }
  59
  60         @Override
  61         public Executable<Boolean> byHostAndPort(String host, int port) {
  62                 nodeIdentifier.set(String.format("%s:%d", host, port));
  63                 return this::execute;
  64         }
  65
  66         private ListenableFuture<Boolean> execute() {
  67                 if (darknetComment.get() == null) {
  68                         return Futures.immediateFuture(false);
  69                 }
  70                 return threadPool.submit(this::executeDialog);
  71         }
  72
  73         private Boolean executeDialog() throws IOException, ExecutionException, InterruptedException {
  74                 ModifyPeerNote modifyPeerNote =
  75                         new ModifyPeerNote(identifierGenerator.get(), nodeIdentifier.get());
  76                 modifyPeerNote.setPeerNoteType(PeerNoteType.PRIVATE_DARKNET_COMMENT);
  77                 modifyPeerNote.setNoteText(BASE_64.encode(darknetComment.get().getBytes(StandardCharsets.UTF_8)));
  78                 try (ModifyPeerNoteDialog modifyPeerNoteDialog = new ModifyPeerNoteDialog()) {
  79                         return modifyPeerNoteDialog.send(modifyPeerNote).get();
  80                 }
  81         }
  82
  83         private class ModifyPeerNoteDialog extends FcpDialog<Boolean> {
  84
  85                 private final AtomicBoolean finished = new AtomicBoolean();
  86                 private final AtomicBoolean successful = new AtomicBoolean();
  87
  88                 public ModifyPeerNoteDialog() throws IOException {
  89                         super(threadPool, connectionSupplier.get());
  90                 }
  91
  92                 @Override
  93                 protected boolean isFinished() {
  94                         return finished.get();
  95                 }
  96
  97                 @Override
  98                 protected Boolean getResult() {
  99                         return successful.get();
 100                 }
 101
 102                 @Override
 103                 protected void consumePeerNote(PeerNote peerNote) {
 104                         successful.set(true);
 105                         finished.set(true);
 106                 }
 107
 108                 @Override
 109                 protected void consumeUnknownNodeIdentifier(UnknownNodeIdentifier unknownNodeIdentifier) {
 110                         finished.set(true);
 111                 }
 112
 113         }
 114
 115 }