Implement tab complete and permissions check on commands

src/main/java/me/feusalamander/vmessage/ReloadCommand.java

@@ -5,33 +5,43 @@ import com.velocitypowered.api.command.SimpleCommand;
 import net.kyori.adventure.text.Component;
 import net.kyori.adventure.text.format.NamedTextColor;
 
-import java.nio.file.Path;
+import java.util.List;
 
 public final class ReloadCommand implements SimpleCommand {
-    final Path dataDirectory;
+    private final Configuration config;
-    final Configuration config;
 
-    ReloadCommand(Path dataDirectory, Configuration config) {
+    ReloadCommand(Configuration config) {
-        this.dataDirectory = dataDirectory;
         this.config = config;
     }
 
     @Override
     public void execute(final Invocation invocation) {
-        CommandSource source = invocation.source();
+        final CommandSource source = invocation.source();
-        String[] args = invocation.arguments();
+        final String[] args = invocation.arguments();
         if (args.length == 0) {
             source.sendMessage(Component.text("Usage: /vmessage reload", NamedTextColor.RED));
             return;
         }
-        String s = args[0];
+        final String s = args[0];
         if (s.equalsIgnoreCase("reload")) {
-            if (!source.hasPermission("*")) {
-                source.sendMessage(Component.text("You don't have the permission to do that", NamedTextColor.RED));
-                return;
-            }
             config.reload();
             source.sendMessage(Component.text("The Vmessage's config has been succefully reloaded"));
         }
     }
+
+    @Override
+    public boolean hasPermission(final Invocation invocation) {
+        return invocation.source().hasPermission("vmessage.command");
+    }
+
+    private static final List<String> suggestion = List.of("reload");
+
+    @Override
+    public List<String> suggest(final Invocation invocation) {
+        final String[] args = invocation.arguments();
+        if (args.length == 0 || (args.length == 1 && "reload".startsWith(args[0]))) {
+            return suggestion;
+        }
+        return List.of();
+    }
 }

src/main/java/me/feusalamander/vmessage/SendCommand.java

@@ -7,7 +7,7 @@ import net.kyori.adventure.text.Component;
 import net.kyori.adventure.text.format.NamedTextColor;
 
 public final class SendCommand implements SimpleCommand {
-    VMessage main;
+    private final VMessage main;
 
     SendCommand(VMessage main) {
         this.main = main;
@@ -15,17 +15,19 @@ public final class SendCommand implements SimpleCommand {
 
     @Override
     public void execute(final Invocation invocation) {
-        CommandSource source = invocation.source();
+        final CommandSource source = invocation.source();
-        String[] args = invocation.arguments();
+        final String[] args = invocation.arguments();
-        if (!(source instanceof Player)) {
-            return;
-        }
         if (args.length == 0) {
             source.sendMessage(Component.text("Usage: /sendall *your message*", NamedTextColor.RED));
             return;
         }
-        Player p = (Player) source;
+        final Player p = (Player) source;
-        String s = args[0];
+        final String s = args[0];
         main.listeners.message(p, s);
     }
+
+    @Override
+    public boolean hasPermission(final Invocation invocation) {
+        return invocation.source() instanceof Player;
+    }
 }

src/main/java/me/feusalamander/vmessage/VMessage.java

@@ -50,7 +50,7 @@ public class VMessage {
         CommandMeta commandMeta = commandManager.metaBuilder("Vmessage")
                 .plugin(this)
                 .build();
-        SimpleCommand command = new ReloadCommand(dataDirectory, configuration);
+        SimpleCommand command = new ReloadCommand(configuration);
         commandManager.register(commandMeta, command);
         CommandMeta sendmeta = commandManager.metaBuilder("sendall")
                 .plugin(this)