Some command framework cleanup

Most notably, remove the synchronization on the commands map, which is unnecessary since it is not modified after startup.

core/src/main/java/org/geysermc/geyser/command/CommandExecutor.java

@@ -80,8 +80,8 @@ public class CommandExecutor {
         Map<String, GeyserCommand> commands = geyser.getCommandManager().getCommands();
 
         // Only show commands they have permission to use
-        for (String name : commands.keySet()) {
+        for (Map.Entry<String, GeyserCommand> entry : commands.entrySet()) {
-            GeyserCommand geyserCommand = commands.get(name);
+            GeyserCommand geyserCommand = entry.getValue();
             if (sender.hasPermission(geyserCommand.getPermission())) {
 
                 if (geyserCommand.isBedrockOnly()) {
@@ -89,7 +89,7 @@ public class CommandExecutor {
                     continue;
                 }
 
-                availableCommands.add(name);
+                availableCommands.add(entry.getKey());
             }
         }
 

core/src/main/java/org/geysermc/geyser/command/CommandManager.java

@@ -38,7 +38,7 @@ import java.util.*;
 public abstract class CommandManager {
 
     @Getter
-    private final Map<String, GeyserCommand> commands = Collections.synchronizedMap(new HashMap<>());
+    private final Map<String, GeyserCommand> commands = new HashMap<>();
 
     private final GeyserImpl geyser;
 

core/src/main/java/org/geysermc/geyser/command/defaults/HelpCommand.java

@@ -25,6 +25,7 @@
 
 package org.geysermc.geyser.command.defaults;
 
+import org.geysermc.common.PlatformType;
 import org.geysermc.geyser.GeyserImpl;
 import org.geysermc.geyser.command.CommandSender;
 import org.geysermc.geyser.command.GeyserCommand;
@@ -60,16 +61,17 @@ public class HelpCommand extends GeyserCommand {
         sender.sendMessage(header);
 
         Map<String, GeyserCommand> cmds = geyser.getCommandManager().getCommands();
-        for (String cmdName : cmds.keySet()) {
+        for (Map.Entry<String, GeyserCommand> entry : cmds.entrySet()) {
-            GeyserCommand cmd = cmds.get(cmdName);
+            GeyserCommand cmd = entry.getValue();
 
-            if (sender.hasPermission(cmd.getPermission())) {
+            // Standalone hack-in since it doesn't have a concept of permissions
+            if (geyser.getPlatformType() == PlatformType.STANDALONE || 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 + ": " +
+                sender.sendMessage(ChatColor.YELLOW + "/geyser " + entry.getKey() + ChatColor.WHITE + ": " +
                         GeyserLocale.getPlayerLocaleString(cmd.getDescription(), sender.getLocale()));
             }
         }

core/src/main/java/org/geysermc/geyser/level/GeyserWorldManager.java

@@ -37,6 +37,8 @@ import org.geysermc.geyser.session.cache.ChunkCache;
 import org.geysermc.geyser.translator.inventory.LecternInventoryTranslator;
 import org.geysermc.geyser.level.block.BlockStateValues;
 
+import java.util.Locale;
+
 public class GeyserWorldManager extends WorldManager {
 
     private static final Object2ObjectMap<String, String> gameruleCache = new Object2ObjectOpenHashMap<>();
@@ -107,12 +109,12 @@ public class GeyserWorldManager extends WorldManager {
 
     @Override
     public void setPlayerGameMode(GeyserSession session, GameMode gameMode) {
-        session.sendDownstreamPacket(new ServerboundChatPacket("/gamemode " + gameMode.name().toLowerCase()));
+        session.sendDownstreamPacket(new ServerboundChatPacket("/gamemode " + gameMode.name().toLowerCase(Locale.ROOT)));
     }
 
     @Override
     public void setDifficulty(GeyserSession session, Difficulty difficulty) {
-        session.sendDownstreamPacket(new ServerboundChatPacket("/difficulty " + difficulty.name().toLowerCase()));
+        session.sendDownstreamPacket(new ServerboundChatPacket("/difficulty " + difficulty.name().toLowerCase(Locale.ROOT)));
     }
 
     @Override