Added MissingSubcommandException, plus some more internal changes

src/main/java/fr/zcraft/quartzlib/components/commands/CommandGroup.java

@@ -1,15 +1,17 @@
 package fr.zcraft.quartzlib.components.commands;
 
 import fr.zcraft.quartzlib.components.commands.exceptions.CommandException;
+import fr.zcraft.quartzlib.components.commands.exceptions.MissingSubcommandException;
 import java.lang.reflect.Field;
 import java.util.Arrays;
+import java.util.Collection;
 import java.util.HashMap;
 import java.util.Map;
 import java.util.function.Supplier;
 import org.bukkit.command.CommandSender;
 import org.jetbrains.annotations.Nullable;
 
-class CommandGroup extends CommandNode {
+public class CommandGroup extends CommandNode {
     private final Class<?> commandGroupClass;
 
     @Nullable
@@ -52,7 +54,7 @@ private CommandGroup(
         DiscoveryUtils.getSubCommands(this, typeCollection).forEach(this::addSubCommand);
     }
 
-    public Iterable<CommandNode> getSubCommands() {
+    public Collection<CommandNode> getSubCommands() {
         return this.subCommands.values();
     }
 
@@ -91,6 +93,10 @@ void run(Object parentInstance, CommandSender sender, String[] args) throws Comm
     }
 
     private void runSelf(Object instance, CommandSender sender, String[] args) throws CommandException {
+        if (args.length == 0) {
+            throw new MissingSubcommandException(this);
+        }
+
         String commandName = args[0];
         CommandNode subCommand = subCommands.get(commandName);
         // TODO: handle null

src/main/java/fr/zcraft/quartzlib/components/commands/CommandMethod.java

@@ -29,7 +29,7 @@ class CommandMethod {
             if (parameter.isAnnotationPresent(Sender.class)) { // TODO: check for multiple sender arguments
                 senderArgument = new CommandMethodSenderArgument(parameter, i, typeCollection);
             } else {
-                arguments.add(new CommandMethodArgument(parameter, i, typeCollection));
+                arguments.add(new CommandMethodArgument(this, parameter, i, typeCollection));
             }
         }
 
@@ -69,4 +69,8 @@ private Object[] parseArguments(CommandSender sender, String[] args)
     public CommandMethodArgument[] getArguments() {
         return arguments;
     }
+
+    public Method getMethod() {
+        return method;
+    }
 }

src/main/java/fr/zcraft/quartzlib/components/commands/CommandMethodArgument.java

@@ -1,17 +1,24 @@
 package fr.zcraft.quartzlib.components.commands;
 
 import fr.zcraft.quartzlib.components.commands.exceptions.ArgumentParseException;
+import fr.zcraft.quartzlib.components.commands.exceptions.UnknownArgumentTypeException;
 import java.lang.reflect.Parameter;
 
 public class CommandMethodArgument {
     private final Parameter parameter;
     private final int position;
     private final ArgumentTypeWrapper<?> typeHandler;
 
-    public CommandMethodArgument(Parameter parameter, int position, TypeCollection typeCollection) {
+    public CommandMethodArgument(
+            CommandMethod parent,
+            Parameter parameter,
+            int position,
+            TypeCollection typeCollection
+    ) {
         this.parameter = parameter;
         this.position = position;
-        this.typeHandler = typeCollection.findArgumentType(parameter.getType()).get(); // FIXME: handle unknown types
+        this.typeHandler = typeCollection.findArgumentType(parameter.getType())
+            .orElseThrow(() -> new UnknownArgumentTypeException(parent.getMethod(), parameter.getType()));
     }
 
     public Object parse(String raw) throws ArgumentParseException {

src/main/java/fr/zcraft/quartzlib/components/commands/CommandNode.java

@@ -4,7 +4,7 @@
 import org.bukkit.command.CommandSender;
 import org.jetbrains.annotations.Nullable;
 
-abstract class CommandNode {
+public abstract class CommandNode {
     private final String name;
     @Nullable private final CommandGroup parent;
 

src/main/java/fr/zcraft/quartzlib/components/commands/ExecutionContext.java

@@ -0,0 +1,13 @@
+package fr.zcraft.quartzlib.components.commands;
+
+import org.bukkit.command.CommandSender;
+
+public class ExecutionContext {
+    private final CommandSender sender;
+    private final String[] fullArgs;
+
+    public ExecutionContext(CommandSender sender, String[] fullArgs) {
+        this.sender = sender;
+        this.fullArgs = fullArgs;
+    }
+}

src/main/java/fr/zcraft/quartzlib/components/commands/QuartzCommandExecutor.java

@@ -1,6 +1,7 @@
 package fr.zcraft.quartzlib.components.commands;
 
 import fr.zcraft.quartzlib.components.commands.exceptions.CommandException;
+import fr.zcraft.quartzlib.tools.text.RawMessage;
 import org.bukkit.command.Command;
 import org.bukkit.command.CommandExecutor;
 import org.bukkit.command.CommandSender;
@@ -19,7 +20,7 @@ public boolean onCommand(@NotNull CommandSender sender, @NotNull Command command
         try {
             group.run(sender, args);
         } catch (CommandException e) {
-            throw new RuntimeException(e); // TODO
+            RawMessage.send(sender, e.display(sender).build());
         }
         return true;
     }

src/main/java/fr/zcraft/quartzlib/components/commands/TypeCollection.java

@@ -62,6 +62,8 @@ private void registerNativeTypes() {
         register(new ArgumentTypeWrapper<>(Integer.class, new IntegerArgumentType()));
         register(new ArgumentTypeWrapper<>(String.class, s -> s));
 
+        register(new ArgumentTypeWrapper<>(int.class, new IntegerArgumentType()));
+
         // Generic types
         register(new EnumArgumentType());
 

src/main/java/fr/zcraft/quartzlib/components/commands/exceptions/ArgumentParseException.java

@@ -1,4 +1,11 @@
 package fr.zcraft.quartzlib.components.commands.exceptions;
 
+import fr.zcraft.quartzlib.components.rawtext.RawText;
+import org.bukkit.command.CommandSender;
+
 public class ArgumentParseException extends CommandException {
+    @Override
+    public RawText display(CommandSender sender) {
+        return null;
+    }
 }

src/main/java/fr/zcraft/quartzlib/components/commands/exceptions/CommandException.java

@@ -1,4 +1,8 @@
 package fr.zcraft.quartzlib.components.commands.exceptions;
 
+import fr.zcraft.quartzlib.components.rawtext.RawText;
+import org.bukkit.command.CommandSender;
+
 public abstract class CommandException extends Exception {
+    public abstract RawText display(CommandSender sender);
 }

src/main/java/fr/zcraft/quartzlib/components/commands/exceptions/InvalidSenderException.java

@@ -1,4 +1,11 @@
 package fr.zcraft.quartzlib.components.commands.exceptions;
 
+import fr.zcraft.quartzlib.components.rawtext.RawText;
+import org.bukkit.command.CommandSender;
+
 public class InvalidSenderException extends CommandException {
+    @Override
+    public RawText display(CommandSender sender) {
+        return null;
+    }
 }

src/main/java/fr/zcraft/quartzlib/components/commands/exceptions/MissingSubcommandException.java

@@ -0,0 +1,63 @@
+package fr.zcraft.quartzlib.components.commands.exceptions;
+
+import fr.zcraft.quartzlib.components.commands.CommandGroup;
+import fr.zcraft.quartzlib.components.commands.CommandNode;
+import fr.zcraft.quartzlib.components.i18n.I;
+import fr.zcraft.quartzlib.components.rawtext.RawText;
+import fr.zcraft.quartzlib.components.rawtext.RawTextPart;
+import org.bukkit.ChatColor;
+import org.bukkit.command.CommandSender;
+
+public class MissingSubcommandException extends CommandException {
+    private final CommandGroup commandGroup;
+
+    public MissingSubcommandException(CommandGroup commandGroup) {
+        this.commandGroup = commandGroup;
+    }
+
+    @Override
+    public RawText display(CommandSender sender) {
+        RawTextPart<?> text = new RawText(I.t("Missing subcommand: "))
+                .color(ChatColor.RED)
+                .then("/").color(ChatColor.WHITE)
+                .then(getParents()).color(ChatColor.AQUA)
+                .then(" <").style(ChatColor.GRAY)
+                .then(I.t("sub-command"))
+                    .style(ChatColor.GRAY, ChatColor.UNDERLINE)
+                    .hover(appendSubCommandList(new RawText()))
+                .then(">").style(ChatColor.GRAY);
+
+        return text.build();
+    }
+
+    private String getParents() {
+        StringBuilder builder = new StringBuilder();
+
+        CommandGroup group = commandGroup;
+
+        do {
+            if (builder.length() > 0) {
+                builder.append(' ');
+            }
+            builder.append(group.getName());
+            group = group.getParent();
+        } while (group != null);
+
+        return builder.toString();
+    }
+
+    private RawTextPart<?> appendSubCommandList(RawTextPart<?> text) {
+        boolean first = true;
+        text = text.then(I.t("One of the following:\n  "));
+        for (CommandNode subCommand : commandGroup.getSubCommands()) {
+            if (!first) {
+                text = text.then(", ").color(ChatColor.GRAY);
+            }
+            first = false;
+
+            text = text.then(subCommand.getName()).color(ChatColor.AQUA);
+        }
+
+        return text;
+    }
+}

src/main/java/fr/zcraft/quartzlib/components/commands/exceptions/UnknownArgumentTypeException.java

@@ -0,0 +1,15 @@
+package fr.zcraft.quartzlib.components.commands.exceptions;
+
+import java.lang.reflect.Method;
+
+public class UnknownArgumentTypeException extends RuntimeException {
+    public UnknownArgumentTypeException(Method method, Class<?> foundType) {
+        super(getErrorMessage(method, foundType));
+    }
+
+    private static String getErrorMessage(Method method, Class<?> foundType) {
+        return "Found unknown command argument type: '" + foundType
+                + "' (found in '" + method.toString() + "'). "
+                + "Did you forget to register it to the CommandManager?";
+    }
+}

src/main/java/fr/zcraft/quartzlib/tools/text/RawMessage.java

@@ -41,7 +41,7 @@
  * Utility to send JSON messages.
  *
  * <p>This tool uses the /tellraw command to send the messages. If the JSON is not correctly
- * formatted, the message will not be sent and a Runtime exception containing the exception throw by
+ * formatted, the message will not be sent and a Runtime exception containing the exception thrown by
  * the vanilla /tellraw command will be thrown.</p>
  */
 public final class RawMessage {

src/test/java/fr/zcraft/quartzlib/components/commands/CommandRegistrationTests.java → src/test/java/fr/zcraft/quartzlib/components/commands/CommandExecutionTests.java

@@ -6,7 +6,7 @@
 import org.junit.Before;
 import org.junit.Test;
 
-public class CommandRegistrationTests extends MockedToasterTest {
+public class CommandExecutionTests extends MockedToasterTest {
     private CommandManager commands;
 
     @Before

ztoaster/src/main/java/fr/zcraft/ztoaster/Toaster.java

@@ -30,6 +30,7 @@
 
 package fr.zcraft.ztoaster;
 
+import fr.zcraft.quartzlib.components.commands.CommandManager;
 import fr.zcraft.quartzlib.components.gui.Gui;
 import fr.zcraft.quartzlib.components.i18n.I18n;
 import fr.zcraft.quartzlib.components.scoreboard.Sidebar;
@@ -64,14 +65,16 @@ public class Toaster extends QuartzPlugin implements Listener {
      */
     private Sidebar toasterSidebar;
 
-    public Toaster () {}
+    public Toaster() {
+    }
 
     protected Toaster(JavaPluginLoader loader, PluginDescriptionFile description, File dataFolder, File file) {
         super(loader, description, dataFolder, file);
     }
 
     /**
      * .
+     *
      * @return The id for a new toast.
      */
     public static int newToastId() {
@@ -80,6 +83,7 @@ public static int newToastId() {
 
     /**
      * .
+     *
      * @return an array of all the toasts ever created (until toaster restart).
      */
     public static Toast[] getToasts() {
@@ -106,7 +110,8 @@ public void onEnable() {
 
         loadComponents(Gui.class, ToasterWorker.class, SidebarScoreboard.class, I18n.class);
 
-        // Commands.register("toaster", AddCommand.class, OpenCommand.class, ListCommand.class);
+        new CommandManager()
+                .registerCommand("toaster", ToastCommands.class, ToastCommands::new);
 
         I18n.useDefaultPrimaryLocale();
         I18n.setFallbackLocale(Locale.US);