Expose CommandMeta in CommandManager and add a ref to the plugin instance (#544)

api/src/main/java/com/velocitypowered/api/command/CommandManager.java

@@ -10,6 +10,7 @@ package com.velocitypowered.api.command;
 import com.velocitypowered.api.event.command.CommandExecuteEvent;
 import java.util.Collection;
 import java.util.concurrent.CompletableFuture;
+import org.checkerframework.checker.nullness.qual.Nullable;
 
 /**
  * Handles the registration and execution of commands.
@@ -74,6 +75,13 @@ public interface CommandManager {
    */
   void unregister(String alias);
 
+  /**
+   * Retrieves the {@link CommandMeta} from the specified command alias, if registered.
+   * @param alias the command alias to lookup
+   * @return an {@link CommandMeta} of the alias
+   */
+  @Nullable CommandMeta getCommandMeta(String alias);
+
   /**
    * Attempts to asynchronously execute a command from the given {@code cmdLine}.
    *

api/src/main/java/com/velocitypowered/api/command/CommandMeta.java

@@ -9,6 +9,7 @@ package com.velocitypowered.api.command;
 
 import com.mojang.brigadier.tree.CommandNode;
 import java.util.Collection;
+import org.checkerframework.checker.nullness.qual.Nullable;
 
 /**
  * Contains metadata for a {@link Command}.
@@ -32,6 +33,14 @@ public interface CommandMeta {
    */
   Collection<CommandNode<CommandSource>> getHints();
 
+  /**
+   * Returns the plugin who registered the command.
+   * Note some {@link Command} registrations may not provide this information.
+   *
+   * @return the registering plugin
+   */
+  @Nullable Object getPlugin();
+
   /**
    * Provides a fluent interface to create {@link CommandMeta}s.
    */
@@ -56,6 +65,14 @@ public interface CommandMeta {
      */
     Builder hint(CommandNode<CommandSource> node);
 
+    /**
+     * Specifies the plugin who registers the {@link Command}.
+     *
+     * @param plugin the registering plugin
+     * @return this builder, for chaining
+     */
+    Builder plugin(Object plugin);
+
     /**
      * Returns a newly-created {@link CommandMeta} based on the specified parameters.
      *