Use the parser's new whois command.

src/com/dmdirc/Server.java

@@ -1076,6 +1076,11 @@ public class Server extends FrameContainer implements Connection {
         return parser.map(Parser::getLocalClient).map(ClientInfo::getNickname);
     }
 
+    @Override
+    public void requestUserInfo(final User user) {
+        parser.ifPresent(p -> p.sendWhois(user.getNickname()));
+    }
+
     /**
      * Utility method to get a result from the parser while holding the {@link #parserLock}
      * read lock.

src/com/dmdirc/commandparser/commands/CommandModule.java

@@ -64,6 +64,7 @@ import com.dmdirc.commandparser.commands.server.Raw;
 import com.dmdirc.commandparser.commands.server.RawServerCommand;
 import com.dmdirc.commandparser.commands.server.Reconnect;
 import com.dmdirc.commandparser.commands.server.Umode;
+import com.dmdirc.commandparser.commands.server.Whois;
 import com.dmdirc.interfaces.CommandController;
 import com.dmdirc.interfaces.CommandController.CommandDetails;
 
@@ -379,6 +380,18 @@ public class CommandModule {
         return new SimpleCommandDetails(command, Umode.INFO);
     }
 
+    /**
+     * Provides the /whois command.
+     * 
+     * @param command The instantiated command.
+     *
+     * @return The command's details
+     */
+    @Provides(type = Provides.Type.SET)
+    public CommandDetails getCommand(final Whois command) {
+        return new SimpleCommandDetails(command, Whois.INFO);
+    }
+
     /**
      * Provides a set of raw commands.
      *
@@ -389,7 +402,7 @@ public class CommandModule {
     @Provides(type = Provides.Type.SET_VALUES)
     public Set<CommandDetails> getRawCommands(final CommandController controller) {
         final Set<CommandDetails> results = new HashSet<>();
-        for (String name : new String[]{"lusers", "map", "motd", "oper", "whois", "who"}) {
+        for (String name : new String[]{"lusers", "map", "motd", "oper", "who"}) {
             final RawServerCommand rawCommand = new RawServerCommand(controller, name);
             results.add(new SimpleCommandDetails(rawCommand, rawCommand));
         }

src/com/dmdirc/commandparser/commands/server/Whois.java

@@ -0,0 +1,72 @@
+/*
+ * Copyright (c) 2006-2015 DMDirc Developers
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+package com.dmdirc.commandparser.commands.server;
+
+import com.dmdirc.ServerState;
+import com.dmdirc.commandparser.BaseCommandInfo;
+import com.dmdirc.commandparser.CommandArguments;
+import com.dmdirc.commandparser.CommandInfo;
+import com.dmdirc.commandparser.CommandType;
+import com.dmdirc.commandparser.commands.Command;
+import com.dmdirc.commandparser.commands.CommandOptions;
+import com.dmdirc.commandparser.commands.context.CommandContext;
+import com.dmdirc.commandparser.commands.context.ServerCommandContext;
+import com.dmdirc.interfaces.CommandController;
+import com.dmdirc.interfaces.Connection;
+import com.dmdirc.interfaces.WindowModel;
+
+import javax.annotation.Nonnull;
+import javax.inject.Inject;
+
+/**
+ *
+ */
+@CommandOptions(allowOffline = false)
+public class Whois extends Command {
+
+    /** A command info object for this command. */
+    public static final CommandInfo INFO = new BaseCommandInfo("whois",
+            "whois [nickname] - sends a whois request", CommandType.TYPE_SERVER);
+
+    /**
+     * Creates a new instance of this command.
+     *
+     * @param controller The controller to use for command information.
+     */
+    @Inject
+    public Whois(final CommandController controller) {
+        super(controller);
+    }
+
+    @Override
+    public void execute(@Nonnull final WindowModel origin,
+            final CommandArguments args, final CommandContext context) {
+        final Connection connection = ((ServerCommandContext) context).getConnection();
+        if (connection.getState() != ServerState.CONNECTED) {
+            sendLine(origin, args.isSilent(), FORMAT_ERROR, "Not connected");
+            return;
+        }
+
+        connection.getParser().get().sendWhois(args.getArgumentsAsString());
+    }
+}

src/com/dmdirc/interfaces/Connection.java

@@ -416,4 +416,6 @@ public interface Connection {
      */
     Optional<String> getNickname();
 
+    void requestUserInfo(User user);
+
 }