Add debug command.

src/main/java/com/onarandombox/MultiverseCore/commands/DebugCommand.java

@@ -0,0 +1,56 @@
+package com.onarandombox.MultiverseCore.commands;
+
+import co.aikar.commands.annotation.CommandAlias;
+import co.aikar.commands.annotation.CommandCompletion;
+import co.aikar.commands.annotation.CommandPermission;
+import co.aikar.commands.annotation.Conditions;
+import co.aikar.commands.annotation.Description;
+import co.aikar.commands.annotation.Subcommand;
+import co.aikar.commands.annotation.Syntax;
+import com.dumptruckman.minecraft.util.Logging;
+import com.onarandombox.MultiverseCore.MultiverseCore;
+import org.bukkit.ChatColor;
+import org.bukkit.command.CommandSender;
+import org.jetbrains.annotations.NotNull;
+
+@CommandAlias("mv")
+public class DebugCommand extends MultiverseCoreCommand {
+
+    public DebugCommand(MultiverseCore plugin) {
+        super(plugin);
+    }
+
+    @Subcommand("debug")
+    @CommandPermission("multiverse.core.debug")
+    @Description("Show the current debug level.")
+    public void onShowDebugCommand(@NotNull CommandSender sender) {
+        this.displayDebugMode(sender);
+    }
+
+    @Subcommand("debug")
+    @CommandPermission("multiverse.core.debug")
+    @Syntax("<level>")
+    @CommandCompletion("@toggles|@range:3")
+    @Description("Change debug level.")
+    public void onChangeDebugCommand(@NotNull CommandSender sender,
+
+                                     @Conditions("debuglevel")
+                                     @Syntax("<level>")
+                                     @Description("Debug level to set to.")
+                                     int level) {
+
+        this.plugin.getMVConfig().setGlobalDebug(level);
+        this.saveMVConfigs(sender);
+        this.displayDebugMode(sender);
+    }
+
+    private void displayDebugMode(@NotNull CommandSender sender) {
+        final int debugLevel = this.plugin.getMVConfig().getGlobalDebug();
+        if (debugLevel == 0) {
+            sender.sendMessage("Multiverse Debug mode is " + ChatColor.RED + "OFF");
+            return;
+        }
+        sender.sendMessage("Multiverse Debug mode is at level " + ChatColor.GREEN + debugLevel);
+        Logging.fine("Multiverse Debug ENABLED");
+    }
+}

src/main/java/com/onarandombox/MultiverseCore/commands/MultiverseCoreCommand.java

@@ -2,6 +2,8 @@ package com.onarandombox.MultiverseCore.commands;
 
 import com.onarandombox.MultiverseCore.MultiverseCore;
 import com.onarandombox.MultiverseCore.commandtools.MultiverseCommand;
+import org.bukkit.ChatColor;
+import org.bukkit.command.CommandSender;
 
 /**
  * Generic multiverse core command with handy reference to the plugin instance.
@@ -13,4 +15,13 @@ public abstract class MultiverseCoreCommand extends MultiverseCommand {
     protected MultiverseCoreCommand(MultiverseCore plugin) {
         this.plugin = plugin;
     }
+
+    protected boolean saveMVConfigs(CommandSender sender) {
+        if (this.plugin.saveMVConfigs()) {
+            return true;
+        }
+        sender.sendMessage(ChatColor.RED + "An error occurred while trying to save Multiverse-Core config.yml. " +
+                "You changes will be temporary!");
+        return false;
+    }
 }

src/main/java/com/onarandombox/MultiverseCore/commandtools/MVCommandManager.java

@@ -7,14 +7,21 @@ import co.aikar.commands.CommandCompletions;
 import co.aikar.commands.CommandContexts;
 import co.aikar.commands.PaperCommandManager;
 import com.onarandombox.MultiverseCore.MultiverseCore;
+import com.onarandombox.MultiverseCore.commands.DebugCommand;
 
 /**
  * Main class to manage permissions.
  */
 public class MVCommandManager extends PaperCommandManager {
 
+    private final MultiverseCore plugin;
+
     public MVCommandManager(MultiverseCore plugin) {
         super(plugin);
+        this.plugin = plugin;
+
+        // Register commands
+        this.registerCommand(new DebugCommand(plugin));
     }
 
     /**

src/main/java/com/onarandombox/MultiverseCore/commandtools/MVCommandParser.java

@@ -1,6 +1,12 @@
 package com.onarandombox.MultiverseCore.commandtools;
 
+import co.aikar.commands.BukkitCommandExecutionContext;
+import co.aikar.commands.BukkitCommandIssuer;
+import co.aikar.commands.ConditionContext;
+import co.aikar.commands.ConditionFailedException;
 import co.aikar.commands.PaperCommandContexts;
+import org.bukkit.ChatColor;
+import org.jetbrains.annotations.NotNull;
 
 /**
  * Class to parse command arguments into its object and validate them.
@@ -9,5 +15,20 @@ public class MVCommandParser extends PaperCommandContexts {
 
     public MVCommandParser(MVCommandManager manager) {
         super(manager);
+
+        // Contexts
+
+        // Conditions
+        manager.getCommandConditions().addCondition(int.class, "debuglevel", this::checkDebugLevel);
+    }
+
+    private void checkDebugLevel(@NotNull ConditionContext<BukkitCommandIssuer> context,
+                                 @NotNull BukkitCommandExecutionContext executionContext,
+                                 int level) {
+
+        if (level < 0 || level > 3) {
+            throw new ConditionFailedException("Invalid debug mode level. Please use a number 0-3 "
+                + ChatColor.AQUA + "(3 being many many messages!)");
+        }
     }
 }

src/test/java/com/onarandombox/MultiverseCore/TestDebugMode.java

@@ -11,14 +11,12 @@ import com.onarandombox.MultiverseCore.api.Core;
 import com.onarandombox.MultiverseCore.utils.TestInstanceCreator;
 import junit.framework.Assert;
 import org.bukkit.Server;
-import org.bukkit.command.Command;
 import org.bukkit.command.CommandSender;
 import org.bukkit.plugin.Plugin;
 import org.bukkit.plugin.PluginDescriptionFile;
 import org.bukkit.plugin.java.JavaPluginLoader;
 import org.junit.After;
 import org.junit.Before;
-import org.junit.Ignore;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 import org.powermock.core.classloader.annotations.PowerMockIgnore;
@@ -29,13 +27,10 @@ import java.io.File;
 
 import static org.junit.Assert.assertNotNull;
 import static org.junit.Assert.assertTrue;
-import static org.mockito.Mockito.mock;
-import static org.mockito.Mockito.when;
 
 @RunWith(PowerMockRunner.class)
 @PrepareForTest({ MultiverseCore.class, PluginDescriptionFile.class, JavaPluginLoader.class})
 @PowerMockIgnore("javax.script.*")
-@Ignore
 public class TestDebugMode {
     TestInstanceCreator creator;
     Server mockServer;
@@ -70,16 +65,11 @@ public class TestDebugMode {
         File serverDirectory = new File(creator.getCore().getServerFolder(), "world");
         serverDirectory.mkdirs();
 
-        // Initialize a fake command
-        Command mockCommand = mock(Command.class);
-        when(mockCommand.getName()).thenReturn("mv");
-
         // Assert debug mode is off
         Assert.assertEquals(0, core.getMVConfig().getGlobalDebug());
 
         // Send the debug command.
-        String[] debugArgs = new String[] { "debug", "3" };
+        this.creator.dispatch(mockCommandSender, "mv debug 3");
-        plugin.onCommand(mockCommandSender, mockCommand, "", debugArgs);
 
         Assert.assertEquals(3, core.getMVConfig().getGlobalDebug());
     }