Implemented the unregister command

src/main/java/fr/xephi/authme/AuthMe.java

@@ -351,7 +351,7 @@ public class AuthMe extends JavaPlugin {
         //getCommand("login").setExecutor(new LoginCommand(this));
         //getCommand("changepassword").setExecutor(new ChangePasswordCommand(this));
         //getCommand("logout").setExecutor(new LogoutCommand(this));
-        getCommand("unregister").setExecutor(new UnregisterCommand(this));
+        //getCommand("unregister").setExecutor(new UnregisterCommand(this));
         getCommand("email").setExecutor(new EmailCommand(this));
         getCommand("captcha").setExecutor(new CaptchaCommand(this));
         getCommand("converter").setExecutor(new ConverterCommand(this));

src/main/java/fr/xephi/authme/command/CommandManager.java

@@ -413,6 +413,35 @@ public class CommandManager {
         registerHelpCommand.addArgument(new CommandArgumentDescription("query", "The command or query to view help for.", true));
         registerHelpCommand.setMaximumArguments(false);
 
+        // Register the base unregister command
+        CommandDescription unregisterBaseCommand = new CommandDescription(
+                new RegisterCommand(),
+                new ArrayList<String>() {{
+                    add("unregister");
+                    add("unreg");
+                }},
+                "Unregistration command",
+                "Command to unregister using AuthMeReloaded.", null);
+        unregisterBaseCommand.setCommandPermissions("authme.unregister", CommandPermissions.DefaultPermission.ALLOWED);
+        unregisterBaseCommand.addArgument(new CommandArgumentDescription("password", "Password", false));
+        unregisterBaseCommand.setMaximumArguments(false);
+
+        // Register the help command
+        CommandDescription unregisterHelpCommand = new CommandDescription(
+                new HelpCommand(),
+                new ArrayList<String>() {{
+                    add("help");
+                    add("hlp");
+                    add("h");
+                    add("sos");
+                    add("?");
+                }},
+                "View help",
+                "View detailed help pages about AuthMeReloaded register commands.",
+                unregisterBaseCommand);
+        unregisterHelpCommand.addArgument(new CommandArgumentDescription("query", "The command or query to view help for.", true));
+        unregisterHelpCommand.setMaximumArguments(false);
+
         // Register the base changepassword command
         CommandDescription changePasswordBaseCommand = new CommandDescription(
                 new ChangePasswordCommand(),
@@ -448,6 +477,7 @@ public class CommandManager {
         this.commandDescriptions.add(loginBaseCommand);
         this.commandDescriptions.add(logoutBaseCommand);
         this.commandDescriptions.add(registerBaseCommand);
+        this.commandDescriptions.add(unregisterBaseCommand);
         this.commandDescriptions.add(changePasswordBaseCommand);
     }
 

src/main/java/fr/xephi/authme/command/executable/unregister/UnregisterCommand.java

@@ -0,0 +1,52 @@
+package fr.xephi.authme.command.executable.unregister;
+
+import fr.xephi.authme.AuthMe;
+import fr.xephi.authme.cache.auth.PlayerCache;
+import fr.xephi.authme.command.CommandParts;
+import fr.xephi.authme.command.ExecutableCommand;
+import fr.xephi.authme.settings.Messages;
+import org.bukkit.command.CommandSender;
+import org.bukkit.entity.Player;
+
+public class UnregisterCommand extends ExecutableCommand {
+
+    /**
+     * Execute the command.
+     *
+     * @param sender The command sender.
+     * @param commandReference The command reference.
+     * @param commandArguments The command arguments.
+     *
+     * @return True if the command was executed successfully, false otherwise.
+     */
+    @Override
+    public boolean executeCommand(CommandSender sender, CommandParts commandReference, CommandParts commandArguments) {
+        // AuthMe plugin instance
+        final AuthMe plugin = AuthMe.getInstance();
+
+        // Messages instance
+        final Messages m = Messages.getInstance();
+
+        // Make sure the current command executor is a player
+        if(!(sender instanceof Player)) {
+            return true;
+        }
+
+        // Get the password
+        String playerPass = commandArguments.get(0);
+
+        // Get the player instance and name
+        final Player player = (Player) sender;
+        final String playerNameLowerCase = player.getName().toLowerCase();
+
+        // Make sure the player is authenticated
+        if (!PlayerCache.getInstance().isAuthenticated(playerNameLowerCase)) {
+            m.send(player, "not_logged_in");
+            return true;
+        }
+
+        // Unregister the player
+        plugin.management.performUnregister(player, playerPass, false);
+        return true;
+    }
+}