Add more opt-in commands

Author: Earthcomputer

docs/server_installation.md

@@ -5,13 +5,16 @@ These commands are:
     - We may consider re-allowing this command if a line-of-sight test is implemented before the result is printed to the user. If you are interested in contributing this feature, please join the Discord and discuss the implementation with us. We could then add an `--x-ray` flag to enable current behaviour with the opt-in.
 - `/careastats` doesn't tell you where the blocks are but it does tell you the existence of blocks in an area, which could for example be used to effectively widen your branch mine tunnel.
 - `/csignsearch` can search for signs hidden behind other blocks.
-- `/cfind` can search for entities hidden behind other blocks.
+- `/cfind` can search for entities hidden behind blocks.
+- `/cglow entities` can search for entities hidden behind blocks.
+- `/cgetdata entity` can search for and get data (including coordinates) from entities hidden behind blocks.
 - `/cghostblock` has the side effect of enabling flight by walking on the created ghost blocks.
 
 Other commands considered but not included in the list requiring the opt-in are:
 - `/cfinditem` only searches containers near the player by clicking on them, unless the player is opped.
     - In the near future we may implement a more powerful mode if clientcommands is installed on the server.
 - `/csnap` is a teleport but restricted to a maximum of one block distance, reflecting its intention of being used for precise alignment ("snapping") rather than longer-distance teleportation, speed hacks, or flying. It needs to be used with a script or macro to be at all an effective method to do these things, which is functionality that clientcommands doesn't provide.
+- `/cgetdata block` requires you to already know the coordinates of the block you want to get data from, making it an ineffective method to X-ray.
 
 If you want to continue using these commands, ask your server admin to install Fabric Loader and place clientcommands and Fabric API in the mods folder. If there is enough demand for it, we may also implement a Paper plugin and a NeoForge mod which implements the same opt-in functionality.
 

src/main/java/net/earthcomputer/clientcommands/command/GetDataCommand.java

@@ -9,6 +9,7 @@
 import com.mojang.brigadier.exceptions.CommandSyntaxException;
 import com.mojang.brigadier.exceptions.DynamicCommandExceptionType;
 import com.mojang.brigadier.exceptions.SimpleCommandExceptionType;
+import net.earthcomputer.clientcommands.server.ClientCommandsServer;
 import net.fabricmc.fabric.api.client.command.v2.FabricClientCommandSource;
 import net.minecraft.client.Minecraft;
 import net.minecraft.core.BlockPos;
@@ -43,6 +44,7 @@ public class GetDataCommand {
     private static final Function<String, AccessorType> CLIENT_ENTITY_DATA_ACCESSOR = argName -> new AccessorType() {
         @Override
         public DataAccessor getAccessor(CommandContext<FabricClientCommandSource> ctx) throws CommandSyntaxException {
+            ClientCommandsServer.requirePrivileges();
             return new EntityDataAccessor(getEntity(ctx, argName));
         }
 

src/main/java/net/earthcomputer/clientcommands/command/GlowCommand.java

@@ -7,6 +7,7 @@
 import dev.xpple.clientarguments.arguments.CEntitySelector;
 import net.earthcomputer.clientcommands.interfaces.IEntity_Glowable;
 import net.earthcomputer.clientcommands.render.RenderQueue;
+import net.earthcomputer.clientcommands.server.ClientCommandsServer;
 import net.earthcomputer.clientcommands.task.SimpleTask;
 import net.earthcomputer.clientcommands.task.TaskManager;
 import net.earthcomputer.clientcommands.util.CComponentUtil;
@@ -74,6 +75,7 @@ public static void register(CommandDispatcher<FabricClientCommandSource> dispatc
     }
 
     private static int glowEntities(FabricClientCommandSource source, CEntitySelector entitySelector, int seconds, int color) throws CommandSyntaxException {
+        ClientCommandsServer.requirePrivileges();
         boolean keepSearching = getFlag(source, FLAG_KEEP_SEARCHING);
         if (keepSearching) {
             String taskName = TaskManager.addTask("cglow", new SimpleTask() {