Add initial brigadier support (implements #77) (#153)

Co-authored-by: Aikar <aikar@aikar.co>

example/pom.xml

@@ -111,7 +111,7 @@
         <dependency>
             <groupId>com.destroystokyo.paper</groupId>
             <artifactId>paper-api</artifactId>
-            <version>1.13.2-R0.1-SNAPSHOT</version>
+            <version>1.15.2-R0.1-SNAPSHOT</version>
             <scope>provided</scope>
         </dependency>
         <dependency>

example/src/main/java/co/aikar/acfexample/ACFExample.java

@@ -23,10 +23,11 @@
 
 package co.aikar.acfexample;
 
-import co.aikar.commands.PaperCommandManager;
 import co.aikar.commands.ConditionFailedException;
 import co.aikar.commands.MessageKeys;
 import co.aikar.commands.MessageType;
+import co.aikar.commands.PaperBrigadierManager;
+import co.aikar.commands.PaperCommandManager;
 import org.bukkit.plugin.java.JavaPlugin;
 
 import java.util.Arrays;
@@ -46,6 +47,9 @@ public final class ACFExample extends JavaPlugin {
         // 1: Create Command Manager for your respective platform
         commandManager = new PaperCommandManager(this);
 
+        // enable brigadier integration for paper servers
+        commandManager.enableUnstableAPI("brigadier");
+
         // optional: enable unstable api to use help
         commandManager.enableUnstableAPI("help");
 
@@ -109,6 +113,12 @@ public final class ACFExample extends JavaPlugin {
             getLogger().warning("Error occurred while executing command " + command.getName());
             return false; // mark as unhandeled, sender will see default message
         });
+
+        // test command for brigadier
+        commandManager.getCommandCompletions().registerAsyncCompletion("someobject", c ->
+                Arrays.asList("1", "2", "3", "4", "5")
+        );
+        commandManager.registerCommand(new BrigadierTest());
     }
 
     // Typical Bukkit Plugin Scaffolding

example/src/main/java/co/aikar/acfexample/BrigadierTest.java

@@ -0,0 +1,92 @@
+package co.aikar.acfexample;
+
+import co.aikar.commands.BaseCommand;
+import co.aikar.commands.CommandHelp;
+import co.aikar.commands.annotation.CommandAlias;
+import co.aikar.commands.annotation.CommandCompletion;
+import co.aikar.commands.annotation.CommandPermission;
+import co.aikar.commands.annotation.Default;
+import co.aikar.commands.annotation.Description;
+import co.aikar.commands.annotation.Flags;
+import co.aikar.commands.annotation.HelpCommand;
+import co.aikar.commands.annotation.Optional;
+import co.aikar.commands.annotation.Single;
+import co.aikar.commands.annotation.Subcommand;
+import co.aikar.commands.annotation.Syntax;
+import org.bukkit.command.CommandSender;
+import org.bukkit.entity.Player;
+
+@CommandAlias("brigadiertest")
+public class BrigadierTest extends BaseCommand {
+
+    @Subcommand("hello")
+    @Syntax("<player>")
+    @CommandCompletion("@players")
+    @Description("Says hello to a player")
+    public static void onHello(Player player, @Flags("other") Player arg) {
+        player.sendMessage("You said hello to " + arg.getDisplayName());
+    }
+
+    @Default
+    @HelpCommand
+    public static void onHelp(CommandSender sender, CommandHelp help) {
+        help.showHelp();
+    }
+
+    @Subcommand("test|test2")
+    @Description("Says hello to a player")
+    @CommandCompletion("true|false @range:20 @range:1-5 @range:20-30 test|test2|foo|bar true|false")
+    public static void onTest(CommandSender sender, boolean booleanParam, float floatParam, double doubleParam, int integerParam, String stringParam, @Optional Boolean test2) {
+        sender.sendMessage("You said: " + booleanParam + " - " + floatParam + " - " + doubleParam + " - " + integerParam + " - " + stringParam + " - " + test2 + "!");
+    }
+
+    @Subcommand("custom")
+    @Description("Try custom completions")
+    @Syntax("<syntaxTest>")
+    @CommandCompletion("@someobject")
+    public static void onCustom(Player player, SomeObject object) {
+        player.sendMessage("You said: " + object);
+    }
+
+    @Subcommand("dummy admin")
+    @CommandPermission("dummy")
+    public static void onPerm(Player player) {
+        player.sendMessage("You shall pass");
+    }
+
+    @Subcommand("sub3")
+    public static void sub3(Player player, String wooo) {
+        player.sendMessage("Wooo " + wooo);
+    }
+
+    @Subcommand("sub sub")
+    public static void onSubSub(Player player, String wooo) {
+        player.sendMessage("Wooo " + wooo);
+    }
+
+    @Subcommand("sub2")
+    public static void onSub2(Player player) {
+        player.sendMessage("Sub2");
+    }
+
+    @Subcommand("sub2 sub")
+    public static void onSub2Sub(Player player, String test) {
+        player.sendMessage("Sub2 sub " + test);
+    }
+
+    @Subcommand("find|where")
+    @CommandPermission("hyperverse.find")
+    @CommandAlias("hvf|hvfind")
+    @CommandCompletion("@players")
+    public void findPlayer(final CommandSender sender, final String player) { /* stub */ }
+
+    @Subcommand("greedy")
+    public void onGreedy(Player player, String greedyString) {
+        player.sendMessage(greedyString);
+    }
+
+    @Subcommand("notgreedy")
+    public void notGreedy(Player player, @Single String notGreedy) {
+        player.sendMessage(notGreedy);
+    }
+}