Prevent messaging vanished players (#12)

Author: zefir-git

src/main/java/pro/cloudnode/smp/cloudnodemsg/CloudnodeMSG.java

@@ -1,5 +1,7 @@
 package pro.cloudnode.smp.cloudnodemsg;
 
+import org.bukkit.entity.Player;
+import org.bukkit.metadata.MetadataValue;
 import org.bukkit.plugin.java.JavaPlugin;
 import org.jetbrains.annotations.NotNull;
 import pro.cloudnode.smp.cloudnodemsg.command.MainCommand;
@@ -33,6 +35,12 @@ public void onDisable() {
         // Plugin shutdown logic
     }
 
+    public static boolean isVanished(final @NotNull Player player) {
+        for (final @NotNull MetadataValue meta : player.getMetadata("vanished"))
+            if (meta.asBoolean()) return true;
+        return false;
+    }
+
     private final @NotNull PluginConfig config = new PluginConfig(getConfig());
 
     public @NotNull PluginConfig config() {

src/main/java/pro/cloudnode/smp/cloudnodemsg/Permission.java

@@ -12,4 +12,9 @@ public final class Permission {
      * Allows reloading the plugin
      */
     public final static @NotNull String RELOAD = "cloudnodemsg.reload";
+
+    /**
+     * Allows sending messages to vanished players
+     */
+    public final static @NotNull String SEND_VANISHED = "cloudnodemsg.send.vanished";
 }

src/main/java/pro/cloudnode/smp/cloudnodemsg/command/MessageCommand.java

@@ -28,7 +28,7 @@ public boolean onCommand(final @NotNull CommandSender sender, final @NotNull org
 
         final @NotNull Optional<@NotNull Player> recipient = Optional.ofNullable(CloudnodeMSG.getInstance().getServer()
                 .getPlayer(args[0]));
-        if (recipient.isEmpty()) return new PlayerNotFoundError(args[0]).send(sender);
+        if (recipient.isEmpty() || (CloudnodeMSG.isVanished(recipient.get()) && !sender.hasPermission(Permission.SEND_VANISHED))) return new PlayerNotFoundError(args[0]).send(sender);
         if (sender instanceof final @NotNull Player player && recipient.get().getUniqueId().equals(player.getUniqueId()))
             return new MessageYourselfError().send(sender);
 

src/main/java/pro/cloudnode/smp/cloudnodemsg/command/ReplyCommand.java

@@ -13,6 +13,7 @@
 
 import java.util.ArrayList;
 import java.util.List;
+import java.util.Objects;
 import java.util.Optional;
 
 public final class ReplyCommand extends Command {
@@ -25,7 +26,14 @@ public boolean onCommand(final @NotNull CommandSender sender, final @NotNull org
 
         final @NotNull Optional<@NotNull OfflinePlayer> recipient = Message.getReplyTo(Message.offlinePlayer(sender));
         if (recipient.isEmpty()) return new NobodyReplyError().send(sender);
-        if (!recipient.get().getUniqueId().equals(Message.console.getUniqueId()) && !recipient.get().isOnline()) return new ReplyOfflineError(Optional.ofNullable(recipient.get().getName()).orElse("Unknown Player")).send(sender);
+        if (
+            !recipient.get().getUniqueId().equals(Message.console.getUniqueId())
+            && (
+                    !recipient.get().isOnline()
+                    || (CloudnodeMSG.isVanished(Objects.requireNonNull(recipient.get().getPlayer())) && !sender.hasPermission(Permission.SEND_VANISHED))
+            )
+        )
+            return new ReplyOfflineError(Optional.ofNullable(recipient.get().getName()).orElse("Unknown Player")).send(sender);
 
         try {
             new Message(Message.offlinePlayer(sender), recipient.get(), String.join(" ", args)).send();