Add tab completer, alpha-version, add tests

Author: MrApik

build.gradle

@@ -33,6 +33,11 @@ subprojects {
         useJUnitPlatform()
     }
 
+    dependencies {
+        testImplementation 'org.junit.jupiter:junit-jupiter-api:5.10.3'
+        testRuntimeOnly 'org.junit.jupiter:junit-jupiter-engine:5.10.3'
+    }
+
     if (!(project.name in ['shared'])) {
         apply plugin: 'com.github.johnrengelman.shadow'
 

paper/src/main/java/cz/foresttech/commandapi/paper/CommandAPI.java

@@ -4,14 +4,15 @@
 import cz.foresttech.commandapi.paper.argument.PlayerArgumentProcessor;
 import cz.foresttech.commandapi.shared.AbstractCommandAPI;
 import org.bukkit.OfflinePlayer;
-import org.bukkit.command.Command;
-import org.bukkit.command.CommandExecutor;
-import org.bukkit.command.CommandSender;
+import org.bukkit.command.*;
 import org.bukkit.entity.Player;
 import org.bukkit.plugin.java.JavaPlugin;
 import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
 
-public class CommandAPI extends AbstractCommandAPI<CommandSenderWrapper> implements CommandExecutor {
+import java.util.List;
+
+public class CommandAPI extends AbstractCommandAPI<CommandSenderWrapper> implements CommandExecutor, TabCompleter {
 
     private final JavaPlugin javaPlugin;
 
@@ -20,9 +21,15 @@ public CommandAPI(JavaPlugin javaPlugin) {
     }
 
     @Override
-    public boolean onCommand(@NotNull CommandSender commandSender, @NotNull Command command, @NotNull String s, @NotNull String[] strings) {
+    public boolean onCommand(@NotNull CommandSender commandSender, @NotNull Command command, @NotNull String s, @NotNull String[] args) {
+        CommandSenderWrapper senderWrapper = new CommandSenderWrapper(commandSender);
+        return onCommand(senderWrapper, command.getName(), args);
+    }
+
+    @Override
+    public @Nullable List<String> onTabComplete(@NotNull CommandSender commandSender, @NotNull Command command, @NotNull String label, @NotNull String[] args) {
         CommandSenderWrapper senderWrapper = new CommandSenderWrapper(commandSender);
-        return onCommand(senderWrapper, command.getName(), strings);
+        return tabComplete(senderWrapper, command.getName(), args);
     }
 
     @Override
@@ -32,9 +39,14 @@ protected void setup() {
     }
 
     @Override
-    protected void register() {
-        javaPlugin.getServer().getCommandMap().getKnownCommands().values().forEach(command -> {
-            javaPlugin.getCommand(command.getName()).setExecutor(this);
-        });
+    protected boolean registerToPlatform(String cmdName) {
+        PluginCommand pluginCommand = javaPlugin.getCommand(cmdName);
+        if (pluginCommand == null) {
+            return false;
+        }
+
+        pluginCommand.setExecutor(this);
+        pluginCommand.setTabCompleter(this);
+        return true;
     }
 }

paper/src/main/java/cz/foresttech/commandapi/paper/argument/OfflinePlayerArgumentProcessor.java

@@ -5,6 +5,7 @@
 import org.bukkit.OfflinePlayer;
 import org.bukkit.entity.Player;
 
+import java.util.List;
 import java.util.UUID;
 
 public class OfflinePlayerArgumentProcessor implements ArgumentTypeProcessor<OfflinePlayer> {
@@ -33,4 +34,10 @@ public OfflinePlayer get(String argument) {
         return Bukkit.getOfflinePlayer(argument);
     }
 
+    @Override
+    public List<String> tabComplete(String argument) {
+        //TODO?
+        return null;
+    }
+
 }

paper/src/main/java/cz/foresttech/commandapi/paper/argument/PlayerArgumentProcessor.java

@@ -4,6 +4,7 @@
 import org.bukkit.Bukkit;
 import org.bukkit.entity.Player;
 
+import java.util.List;
 import java.util.UUID;
 
 public class PlayerArgumentProcessor implements ArgumentTypeProcessor<Player> {
@@ -21,4 +22,10 @@ public Player get(String argument) {
         return player;
     }
 
+    @Override
+    public List<String> tabComplete(String argument) {
+        //TODO?
+        return null;
+    }
+
 }