Added ValidatingCommand and made /me implement it

Initial work for issue 907

git-svn-id: http://svn.dmdirc.com/trunk@3487 00569f92-eb28-0410-84fd-f71c24880f

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

@@ -0,0 +1,46 @@
+/*
+ * Copyright (c) 2006-2008 Chris Smith, Shane Mc Cormack, Gregory Holmes
+ *
+ * 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;
+
+import com.dmdirc.config.prefs.validator.ValidationResponse;
+import com.dmdirc.ui.interfaces.InputWindow;
+
+import java.util.List;
+
+/**
+ * Validating commands are capable of validating their arguments to determine
+ * whether the input would be valid or not.
+ * 
+ * @author chris
+ */
+public interface ValidatingCommand {
+    
+    /**
+     * Validates the specified arguments.
+     * 
+     * @param origin The window the command is being executed in
+     * @param arguments The arguments that the user has entered (so far)
+     * @return A validation response indicating the validity of the arguments
+     */
+    ValidationResponse validateArguments(InputWindow origin, List<String> arguments);
+
+}

src/com/dmdirc/commandparser/commands/chat/Me.java

@@ -26,13 +26,17 @@ import com.dmdirc.MessageTarget;
 import com.dmdirc.Server;
 import com.dmdirc.commandparser.commands.ChatCommand;
 import com.dmdirc.commandparser.CommandManager;
+import com.dmdirc.commandparser.commands.ValidatingCommand;
+import com.dmdirc.config.prefs.validator.ValidationResponse;
 import com.dmdirc.ui.interfaces.InputWindow;
 
+import java.util.List;
+
 /**
  * The me command sends a CTCP action to the current channel.
  * @author chris
  */
-public final class Me extends ChatCommand {
+public final class Me extends ChatCommand implements ValidatingCommand {
     
     /** Creates a new instance of Me. */
     public Me() {
@@ -69,5 +73,19 @@ public final class Me extends ChatCommand {
     public String getHelp() {
         return "me <action> - sends the specified action";
     }
+
+    /** {@inheritDoc} */
+    @Override
+    public ValidationResponse validateArguments(final InputWindow origin, 
+            final List<String> arguments) {
+        final int length = implodeArgs(arguments.toArray(new String[0])).length();
+        
+        if (origin.getContainer().getServer().getParser().getMaxLength("PRIVMSG",
+                origin.getContainer().toString()) <= length) {
+            return new ValidationResponse("Too long");
+        } else {
+            return new ValidationResponse();
+        }
+    }
     
 }