Remove commands from autocomplete/help list that cannot be run (#2602)

* only tabcomplete for commands the sender has permission for

* set permission defaults for spigot

* Make velocity autocomplete on arg length 0 and 1

* fix advancements perm in spigot plugin.yml and add settings perm

(whoops)

* don't show bedrock commands to java players

* modify spigot perm defaults

* censor help menu, abstract tab complete code

* Bedrock players don't get cmd argument suggestions

* update spigot plugin.yml

bootstrap/bungeecord/src/main/java/org/geysermc/platform/bungeecord/command/BungeeCommandSender.java

@@ -63,4 +63,9 @@ public class BungeeCommandSender implements CommandSender {
         }
         return LanguageUtils.getDefaultLocale();
     }
+
+    @Override
+    public boolean hasPermission(String permission) {
+        return handle.hasPermission(permission);
+    }
 }

bootstrap/bungeecord/src/main/java/org/geysermc/platform/bungeecord/command/GeyserBungeeCommandExecutor.java

@@ -35,8 +35,8 @@ import org.geysermc.connector.command.GeyserCommand;
 import org.geysermc.connector.network.session.GeyserSession;
 import org.geysermc.connector.utils.LanguageUtils;
 
-import java.util.ArrayList;
 import java.util.Arrays;
+import java.util.Collections;
 
 public class GeyserBungeeCommandExecutor extends Command implements TabExecutor {
 
@@ -82,8 +82,9 @@ public class GeyserBungeeCommandExecutor extends Command implements TabExecutor
     @Override
     public Iterable<String> onTabComplete(CommandSender sender, String[] args) {
         if (args.length == 1) {
-            return connector.getCommandManager().getCommandNames();
+            return commandExecutor.tabComplete(new BungeeCommandSender(sender));
+        } else {
+            return Collections.emptyList();
         }
-        return new ArrayList<>();
     }
 }

bootstrap/spigot/src/main/java/org/geysermc/platform/spigot/command/GeyserSpigotCommandExecutor.java

@@ -35,8 +35,8 @@ import org.geysermc.connector.command.GeyserCommand;
 import org.geysermc.connector.network.session.GeyserSession;
 import org.geysermc.connector.utils.LanguageUtils;
 
-import java.util.ArrayList;
 import java.util.Arrays;
+import java.util.Collections;
 import java.util.List;
 
 public class GeyserSpigotCommandExecutor extends CommandExecutor implements TabExecutor {
@@ -78,8 +78,8 @@ public class GeyserSpigotCommandExecutor extends CommandExecutor implements TabE
     @Override
     public List<String> onTabComplete(CommandSender sender, Command command, String label, String[] args) {
         if (args.length == 1) {
-            return connector.getCommandManager().getCommandNames();
+            return tabComplete(new SpigotCommandSender(sender));
         }
-        return new ArrayList<>();
+        return Collections.emptyList();
     }
 }

bootstrap/spigot/src/main/java/org/geysermc/platform/spigot/command/SpigotCommandSender.java

@@ -73,6 +73,11 @@ public class SpigotCommandSender implements CommandSender {
         return locale;
     }
 
+    @Override
+    public boolean hasPermission(String permission) {
+        return handle.hasPermission(permission);
+    }
+
     /**
      * Set if we are on pre-1.12, and therefore {@code player.getLocale()} doesn't exist and we have to get
      * {@code player.spigot().getLocale()}.

bootstrap/spigot/src/main/resources/plugin.yml

@@ -8,21 +8,32 @@ api-version: 1.13
 commands:
   geyser:
     description: The main command for Geyser.
-    usage: /geyser help
+    usage: /geyser <subcommand>
 permissions:
   geyser.command.help:
     description: Shows help for all registered commands.
-  geyser.command.advancement:
-    description: Shows the advancements of the player on the server.
-  geyser.command.dump:
-    description: Dumps Geyser debug information for bug reports.
-  geyser.command.list:
-    description: List all players connected through Geyser.
+    default: true
   geyser.command.offhand:
     description: Puts an items in your offhand.
-  geyser.command.reload:
-    description: Reloads the Geyser configurations. Kicks all players when used!
+    default: true
+  geyser.command.advancements:
+    description: Shows the advancements of the player on the server.
+    default: true
   geyser.command.statistics:
     description: Shows the statistics of the player on the server.
+    default: true
+  geyser.command.settings:
+    description: Modify user settings
+    default: true
+  geyser.command.list:
+    description: List all players connected through Geyser.
+    default: op
+  geyser.command.dump:
+    description: Dumps Geyser debug information for bug reports.
+    default: op
+  geyser.command.reload:
+    description: Reloads the Geyser configurations. Kicks all players when used!
+    default: false
   geyser.command.version:
-    description: Shows the current Geyser version and checks for updates.
+    description: Shows the current Geyser version and checks for updates.
+    default: op

bootstrap/sponge/src/main/java/org/geysermc/platform/sponge/command/GeyserSpongeCommandExecutor.java

@@ -40,8 +40,8 @@ import org.spongepowered.api.world.Location;
 import org.spongepowered.api.world.World;
 
 import javax.annotation.Nullable;
-import java.util.ArrayList;
 import java.util.Arrays;
+import java.util.Collections;
 import java.util.List;
 import java.util.Optional;
 
@@ -82,9 +82,9 @@ public class GeyserSpongeCommandExecutor extends CommandExecutor implements Comm
     @Override
     public List<String> getSuggestions(CommandSource source, String arguments, @Nullable Location<World> targetPosition) {
         if (arguments.split(" ").length == 1) {
-            return connector.getCommandManager().getCommandNames();
+            return tabComplete(new SpongeCommandSender(source));
         }
-        return new ArrayList<>();
+        return Collections.emptyList();
     }
 
     @Override

bootstrap/sponge/src/main/java/org/geysermc/platform/sponge/command/SpongeCommandSender.java

@@ -51,4 +51,9 @@ public class SpongeCommandSender implements CommandSender {
     public boolean isConsole() {
         return handle instanceof ConsoleSource;
     }
+
+    @Override
+    public boolean hasPermission(String permission) {
+        return handle.hasPermission(permission);
+    }
 }

bootstrap/standalone/src/main/java/org/geysermc/platform/standalone/GeyserStandaloneLogger.java

@@ -110,4 +110,9 @@ public class GeyserStandaloneLogger extends SimpleTerminalConsole implements Gey
     public boolean isConsole() {
         return true;
     }
+
+    @Override
+    public boolean hasPermission(String permission) {
+        return true;
+    }
 }

bootstrap/velocity/src/main/java/org/geysermc/platform/velocity/command/GeyserVelocityCommandExecutor.java

@@ -34,8 +34,8 @@ import org.geysermc.connector.common.ChatColor;
 import org.geysermc.connector.network.session.GeyserSession;
 import org.geysermc.connector.utils.LanguageUtils;
 
-import java.util.ArrayList;
 import java.util.Arrays;
+import java.util.Collections;
 import java.util.List;
 
 public class GeyserVelocityCommandExecutor extends CommandExecutor implements SimpleCommand {
@@ -71,9 +71,10 @@ public class GeyserVelocityCommandExecutor extends CommandExecutor implements Si
 
     @Override
     public List<String> suggest(Invocation invocation) {
-        if (invocation.arguments().length == 0) {
-            return connector.getCommandManager().getCommandNames();
+        // Velocity seems to do the splitting a bit differently. This results in the same behaviour in bungeecord/spigot.
+        if (invocation.arguments().length == 0 || invocation.arguments().length == 1) {
+            return tabComplete(new VelocityCommandSender(invocation.source()));
         }
-        return new ArrayList<>();
+        return Collections.emptyList();
     }
 }

bootstrap/velocity/src/main/java/org/geysermc/platform/velocity/command/VelocityCommandSender.java

@@ -72,4 +72,9 @@ public class VelocityCommandSender implements CommandSender {
         }
         return LanguageUtils.getDefaultLocale();
     }
+
+    @Override
+    public boolean hasPermission(String permission) {
+        return handle.hasPermission(permission);
+    }
 }

connector/src/main/java/org/geysermc/connector/command/CommandExecutor.java

@@ -29,6 +29,11 @@ import lombok.AllArgsConstructor;
 import org.geysermc.connector.GeyserConnector;
 import org.geysermc.connector.network.session.GeyserSession;
 
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+import java.util.Map;
+
 /**
  * Represents helper functions for listening to {@code /geyser} commands.
  */
@@ -53,4 +58,39 @@ public class CommandExecutor {
         }
         return null;
     }
+
+    /**
+     * Determine which subcommands to suggest in the tab complete for the main /geyser command by a given command sender.
+     *
+     * @param sender The command sender to receive the tab complete suggestions.
+     *               If the command sender is a bedrock player, an empty list will be returned as bedrock players do not get command argument suggestions.
+     *               If the command sender is not a bedrock player, bedrock commands will not be shown.
+     *               If the command sender does not have the permission for a given command, the command will not be shown.
+     * @return A list of command names to include in the tab complete
+     */
+    public List<String> tabComplete(CommandSender sender) {
+        if (getGeyserSession(sender) != null) {
+            // Bedrock doesn't get tab completions or argument suggestions
+            return Collections.emptyList();
+        }
+
+        List<String> availableCommands = new ArrayList<>();
+        Map<String, GeyserCommand> commands = connector.getCommandManager().getCommands();
+
+        // Only show commands they have permission to use
+        for (String name : commands.keySet()) {
+            GeyserCommand geyserCommand = commands.get(name);
+            if (sender.hasPermission(geyserCommand.getPermission())) {
+
+                if (geyserCommand.isBedrockOnly()) {
+                    // Don't show commands the JE player can't run
+                    continue;
+                }
+
+                availableCommands.add(name);
+            }
+        }
+
+        return availableCommands;
+    }
 }

connector/src/main/java/org/geysermc/connector/command/CommandSender.java

@@ -56,4 +56,12 @@ public interface CommandSender {
     default String getLocale() {
         return LanguageUtils.getDefaultLocale();
     }
+
+    /**
+     * Checks if the CommandSender has a permission
+     *
+     * @param permission The permission node to check
+     * @return true if the CommandSender has the requested permission, false if not
+     */
+    boolean hasPermission(String permission);
 }

connector/src/main/java/org/geysermc/connector/command/defaults/HelpCommand.java

@@ -33,9 +33,7 @@ import org.geysermc.connector.network.session.GeyserSession;
 import org.geysermc.connector.utils.LanguageUtils;
 
 import java.util.Collections;
-import java.util.List;
 import java.util.Map;
-import java.util.stream.Collectors;
 
 public class HelpCommand extends GeyserCommand {
     private final GeyserConnector connector;
@@ -47,16 +45,33 @@ public class HelpCommand extends GeyserCommand {
         this.setAliases(Collections.singletonList("?"));
     }
 
+    /**
+     * Sends the help menu to a command sender. Will not show certain commands depending on the command sender and session.
+     *
+     * @param session The Geyser session of the command sender, if it is a bedrock player. If null, bedrock-only commands will be hidden.
+     * @param sender The CommandSender to send the help message to.
+     * @param args Not used.
+     */
     @Override
     public void execute(GeyserSession session, CommandSender sender, String[] args) {
         int page = 1;
         int maxPage = 1;
         String header = LanguageUtils.getPlayerLocaleString("geyser.commands.help.header", sender.getLocale(), page, maxPage);
-
         sender.sendMessage(header);
+
         Map<String, GeyserCommand> cmds = connector.getCommandManager().getCommands();
-        List<String> commands = connector.getCommandManager().getCommands().keySet().stream().sorted().collect(Collectors.toList());
-        commands.forEach(cmd -> sender.sendMessage(ChatColor.YELLOW + "/geyser " + cmd + ChatColor.WHITE + ": " +
-                LanguageUtils.getPlayerLocaleString(cmds.get(cmd).getDescription(), sender.getLocale())));
+        for (String cmdName : cmds.keySet()) {
+            GeyserCommand cmd = cmds.get(cmdName);
+
+            if (sender.hasPermission(cmd.getPermission())) {
+                // Only list commands the player can actually run
+                if (cmd.isBedrockOnly() && session == null) {
+                    continue;
+                }
+
+                sender.sendMessage(ChatColor.YELLOW + "/geyser " + cmdName + ChatColor.WHITE + ": " +
+                        LanguageUtils.getPlayerLocaleString(cmd.getDescription(), sender.getLocale()));
+            }
+        }
     }
 }

connector/src/main/java/org/geysermc/connector/network/session/GeyserSession.java

@@ -1381,7 +1381,8 @@ public class GeyserSession implements CommandSender {
      * @param permission The permission node to check
      * @return true if the player has the requested permission, false if not
      */
-    public Boolean hasPermission(String permission) {
+    @Override
+    public boolean hasPermission(String permission) {
         return connector.getWorldManager().hasPermission(this, permission);
     }