Add web of trust interface.

diff --git a/src/main/java/de/todesbaum/jsite/application/WebOfTrustInterface.java b/src/main/java/de/todesbaum/jsite/application/WebOfTrustInterface.java
new file mode 100644 (file)
index 0000000..d1fd31d
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+++ b/src/main/java/de/todesbaum/jsite/application/WebOfTrustInterface.java
@@ -0,0 +1,217 @@
+/*
+ * jSite - WebOfTrustInterface.java - Copyright © 2012 David Roden
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+package de.todesbaum.jsite.application;
+
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.concurrent.atomic.AtomicLong;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+
+import net.pterodactylus.util.logging.Logging;
+import de.todesbaum.util.freenet.fcp2.Client;
+import de.todesbaum.util.freenet.fcp2.Connection;
+import de.todesbaum.util.freenet.fcp2.FcpPluginMessage;
+import de.todesbaum.util.freenet.fcp2.Message;
+import de.todesbaum.util.freenet.fcp2.wot.DefaultOwnIdentity;
+import de.todesbaum.util.freenet.fcp2.wot.OwnIdentity;
+
+/**
+ * FCP interface to the node’s web of trust.
+ *
+ * @author David ‘Bombe’ Roden <bombe@freenetproject.org>
+ */
+public class WebOfTrustInterface implements Runnable {
+
+       /** The logger. */
+       private static final Logger logger = Logging.getLogger(WebOfTrustInterface.class);
+
+       /** Unique ID for the command identifier. */
+       private static final AtomicLong commandCounter = new AtomicLong(System.nanoTime());
+
+       /** Object used for synchronization. */
+       private final Object syncObject = new Object();
+
+       /** The freenet interface. */
+       private final Freenet7Interface freenetInterface;
+
+       /** Whether the interface should stop. */
+       private boolean shouldStop;
+
+       /** The own identities. */
+       private final List<OwnIdentity> ownIdentities = new ArrayList<OwnIdentity>();
+
+       /**
+        * Creates a new web of trust interface.
+        *
+        * @param freenetInterface
+        *            The freenet interface
+        */
+       public WebOfTrustInterface(Freenet7Interface freenetInterface) {
+               this.freenetInterface = freenetInterface;
+       }
+
+       //
+       // ACCESSORS
+       //
+
+       /**
+        * Returns a list of own identities. If the identities have not yet been
+        * retrieved, an empty list is returned.
+        *
+        * @return The list of own identities
+        */
+       public List<OwnIdentity> getOwnIdentities() {
+               synchronized (ownIdentities) {
+                       return new ArrayList<OwnIdentity>(ownIdentities);
+               }
+       }
+
+       //
+       // ACTIONS
+       //
+
+       /**
+        * Starts the web of trust interface.
+        */
+       public void start() {
+               Thread webOfTrustThread = new Thread(this, "WebOfTrust Interface");
+               webOfTrustThread.start();
+       }
+
+       /**
+        * Stops the web of trust interface
+        */
+       public void stop() {
+               synchronized (syncObject) {
+                       shouldStop = true;
+                       syncObject.notifyAll();
+               }
+       }
+
+       //
+       // PRIVATE METHODS
+       //
+
+       /**
+        * Returns whether the web of trust interface should stop.
+        *
+        * @return {@code true} if the web of trust interface should stop,
+        *         {@code false} otherwise
+        */
+       private boolean shouldStop() {
+               synchronized (syncObject) {
+                       return shouldStop;
+               }
+       }
+
+       //
+       // RUNNABLE METHODS
+       //
+
+       /**
+        * {@inheritDoc}
+        */
+       @Override
+       public void run() {
+               boolean waitBeforeReconnect = false;
+               while (!shouldStop()) {
+
+                       /* wait a minute before reconnecting for another try. */
+                       if (waitBeforeReconnect) {
+                               logger.log(Level.FINE, "Waiting 60 seconds before reconnecting.");
+                               synchronized (syncObject) {
+                                       try {
+                                               syncObject.wait(60 * 1000);
+                                       } catch (InterruptedException ie1) {
+                                               /* ignore. */
+                                       }
+                               }
+                               if (shouldStop()) {
+                                       continue;
+                               }
+                       } else {
+                               waitBeforeReconnect = true;
+                       }
+
+                       try {
+
+                               /* connect. */
+                               Connection connection = freenetInterface.getConnection("jSite-WoT-Connector");
+                               logger.log(Level.INFO, String.format("Trying to connect to node at %s...", freenetInterface.getNode()));
+                               if (!connection.connect()) {
+                                       logger.log(Level.WARNING, "Connection failed.");
+                                       continue;
+                               }
+                               Client client = new Client(connection);
+
+                               /* send FCP command to WebOfTrust plugin. */
+                               String messageIdentifier = "jSite-WoT-Command-" + commandCounter.getAndIncrement();
+                               FcpPluginMessage pluginMessage = new FcpPluginMessage(messageIdentifier);
+                               pluginMessage.setPluginName("plugins.WebOfTrust.WebOfTrust");
+                               pluginMessage.setParameter("Message", "GetOwnIdentities");
+                               client.execute(pluginMessage);
+
+                               /* read a message. */
+                               Message message = null;
+                               while (!client.isDisconnected() && !shouldStop() && (message == null)) {
+                                       message = client.readMessage(1000);
+                               }
+                               if (message == null) {
+                                       continue;
+                               }
+
+                               /* evaluate message. */
+                               if (message.getName().equals("FCPPluginReply")) {
+                                       logger.log(Level.FINE, "Got matching Reply from WebOfTrust.");
+                                       /* parse identities. */
+                                       List<OwnIdentity> ownIdentities = new ArrayList<OwnIdentity>();
+                                       int identityCounter = -1;
+                                       while (message.get("Replies.Identity" + ++identityCounter) != null) {
+                                               String id = message.get("Replies.Identity" + identityCounter);
+                                               String nickname = message.get("Replies.Nickname " + identityCounter);
+                                               String requestUri = message.get("Replies.RequestURI" + identityCounter);
+                                               String insertUri = message.get("Replies.InsertURI" + identityCounter);
+                                               DefaultOwnIdentity ownIdentity = new DefaultOwnIdentity(id, nickname, requestUri, insertUri);
+                                               logger.log(Level.FINE, String.format("Parsed Own Identity %s.", ownIdentity));
+                                               ownIdentities.add(ownIdentity);
+                                       }
+                                       logger.log(Level.INFO, String.format("Parsed %d Own Identities.", ownIdentities.size()));
+
+                                       synchronized (this.ownIdentities) {
+                                               this.ownIdentities.clear();
+                                               this.ownIdentities.addAll(ownIdentities);
+                                       }
+                               } else if ("ProtocolError".equals(message.getName())) {
+                                       logger.log(Level.WARNING, "WebOfTrust Plugin not found!");
+                               }
+
+                               /* disconnect. */
+                               logger.log(Level.INFO, "Disconnecting from Node.");
+                               connection.disconnect();
+
+                       } catch (IOException ioe1) {
+                               logger.log(Level.WARNING, String.format("Communication with node at %s failed.", freenetInterface.getNode()), ioe1);
+                       }
+
+               }
+       }
+
+}