#1116 #1117 Add command usage hints and remove unused message keys

- Add usage message on argument mismatch where available
- Remove unused message keys
- Create tool task to search for a message key's usages and to find unused keys

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

@@ -19,7 +19,7 @@ public interface ExecutableCommand {
     void executeCommand(CommandSender sender, List<String> arguments);
 
     /**
-     * Returns the message to show to the user if the command is used with the wrong commands.
+     * Returns the message to show to the user if the command is used with the wrong arguments.
      * If null is returned, the standard help (/<i>command</i> help) output is shown.
      *
      * @return the message explaining the command's usage, or {@code null} for default behavior

src/main/java/fr/xephi/authme/command/executable/changepassword/ChangePasswordCommand.java

@@ -54,4 +54,9 @@ public class ChangePasswordCommand extends PlayerCommand {
     protected String getAlternativeCommand() {
         return "/authme password <playername> <password>";
     }
+
+    @Override
+    public MessageKey getArgumentsMismatchMessage() {
+        return MessageKey.USAGE_CHANGE_PASSWORD;
+    }
 }

src/main/java/fr/xephi/authme/command/executable/email/AddEmailCommand.java

@@ -32,4 +32,9 @@ public class AddEmailCommand extends PlayerCommand {
             commonService.send(player, MessageKey.CONFIRM_EMAIL_MESSAGE);
         }
     }
+
+    @Override
+    public MessageKey getArgumentsMismatchMessage() {
+        return MessageKey.USAGE_ADD_EMAIL;
+    }
 }

src/main/java/fr/xephi/authme/command/executable/email/ChangeEmailCommand.java

@@ -1,6 +1,7 @@
 package fr.xephi.authme.command.executable.email;
 
 import fr.xephi.authme.command.PlayerCommand;
+import fr.xephi.authme.message.MessageKey;
 import fr.xephi.authme.process.Management;
 import org.bukkit.entity.Player;
 
@@ -22,4 +23,9 @@ public class ChangeEmailCommand extends PlayerCommand {
 
         management.performChangeEmail(player, playerMailOld, playerMailNew);
     }
+
+    @Override
+    public MessageKey getArgumentsMismatchMessage() {
+        return MessageKey.USAGE_CHANGE_EMAIL;
+    }
 }

src/main/java/fr/xephi/authme/command/executable/email/RecoverEmailCommand.java

@@ -53,7 +53,7 @@ public class RecoverEmailCommand extends PlayerCommand {
             return;
         }
 
-        PlayerAuth auth = dataSource.getAuth(playerName); // TODO: Create method to get email only
+        PlayerAuth auth = dataSource.getAuth(playerName); // TODO #1127: Create method to get email only
         if (auth == null) {
             commonService.send(player, MessageKey.USAGE_REGISTER);
             return;
@@ -73,4 +73,9 @@ public class RecoverEmailCommand extends PlayerCommand {
             recoveryService.generateAndSendNewPassword(player, email);
         }
     }
+
+    @Override
+    public MessageKey getArgumentsMismatchMessage() {
+        return MessageKey.USAGE_RECOVER_EMAIL;
+    }
 }

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

@@ -38,4 +38,14 @@ public class UnregisterCommand extends PlayerCommand {
         // Unregister the player
         management.performUnregister(player, playerPass);
     }
+
+    @Override
+    public MessageKey getArgumentsMismatchMessage() {
+        return MessageKey.USAGE_UNREGISTER;
+    }
+
+    @Override
+    protected String getAlternativeCommand() {
+        return "/authme unregister <player>";
+    }
 }