Add command permissions system

bootstrap/fabric/src/main/java/org/geysermc/platform/fabric/GeyserFabricDumpInfo.java

@@ -31,7 +31,6 @@ import net.fabricmc.loader.api.ModContainer;
 import net.minecraft.server.MinecraftServer;
 import org.geysermc.connector.common.serializer.AsteriskSerializer;
 import org.geysermc.connector.dump.BootstrapDumpInfo;
-import org.geysermc.platform.fabric.command.ModInfo;
 
 import java.util.ArrayList;
 import java.util.List;

bootstrap/fabric/src/main/java/org/geysermc/platform/fabric/GeyserFabricMod.java

@@ -50,16 +50,19 @@ import org.geysermc.platform.fabric.command.GeyserFabricCommandExecutor;
 import org.geysermc.platform.fabric.command.GeyserFabricCommandManager;
 
 import java.io.File;
+import java.io.FileOutputStream;
 import java.io.IOException;
+import java.io.InputStream;
 import java.nio.file.Path;
-import java.util.Map;
-import java.util.UUID;
+import java.util.*;
+import java.util.function.Function;
 
 @Environment(EnvType.SERVER)
 public class GeyserFabricMod implements DedicatedServerModInitializer, GeyserBootstrap {
 
     private GeyserConnector connector;
     private Path dataFolder;
+    private List<String> playerCommands;
     private MinecraftServer server;
 
     private GeyserFabricCommandManager geyserCommandManager;
@@ -83,6 +86,8 @@ public class GeyserFabricMod implements DedicatedServerModInitializer, GeyserBoo
             File configFile = FileUtils.fileOrCopiedFromResource(dataFolder.resolve("config.yml").toFile(), "config.yml",
                     (x) -> x.replaceAll("generateduuid", UUID.randomUUID().toString()));
             this.geyserConfig = FileUtils.loadConfig(configFile, GeyserFabricConfiguration.class);
+            File permissionsFile = fileOrCopiedFromResource(dataFolder.resolve("permissions.yml").toFile(), "permissions.yml");
+            this.playerCommands = Arrays.asList(FileUtils.loadConfig(permissionsFile, GeyserFabricPermissions.class).getCommands());
         } catch (IOException ex) {
             LogManager.getLogger("geyser-fabric").error(LanguageUtils.getLocaleStringLog("geyser.config.failed"), ex);
             ex.printStackTrace();
@@ -118,11 +123,12 @@ public class GeyserFabricMod implements DedicatedServerModInitializer, GeyserBoo
             // Start command building
             // Set just "geyser" as the help command
             LiteralArgumentBuilder<ServerCommandSource> builder = net.minecraft.server.command.CommandManager.literal("geyser")
-                    .executes(new GeyserFabricCommandExecutor(connector, "help"));
+                    .executes(new GeyserFabricCommandExecutor(connector, "help", !playerCommands.contains("help")));
             for (Map.Entry<String, GeyserCommand> command : connector.getCommandManager().getCommands().entrySet()) {
                 // Register all subcommands as valid
                 builder.then(net.minecraft.server.command.CommandManager.literal(
-                        command.getKey()).executes(new GeyserFabricCommandExecutor(connector, command.getKey())));
+                        command.getKey()).executes(new GeyserFabricCommandExecutor(connector, command.getKey(),
+                        !playerCommands.contains(command.getKey()))));
             }
             server.getCommandManager().getDispatcher().register(builder);
         });
@@ -167,4 +173,28 @@ public class GeyserFabricMod implements DedicatedServerModInitializer, GeyserBoo
     public BootstrapDumpInfo getDumpInfo() {
         return new GeyserFabricDumpInfo(server);
     }
+
+    private File fileOrCopiedFromResource(File file, String name) throws IOException {
+        if (!file.exists()) {
+            //noinspection ResultOfMethodCallIgnored
+            file.createNewFile();
+            FileOutputStream fos = new FileOutputStream(file);
+            InputStream input = GeyserFabricMod.class.getResourceAsStream("/" + name); // resources need leading "/" prefix
+
+            byte[] bytes = new byte[input.available()];
+
+            //noinspection ResultOfMethodCallIgnored
+            input.read(bytes);
+
+            for(char c : new String(bytes).toCharArray()) {
+                fos.write(c);
+            }
+
+            fos.flush();
+            input.close();
+            fos.close();
+        }
+
+        return file;
+    }
 }

bootstrap/fabric/src/main/java/org/geysermc/platform/fabric/GeyserFabricPermissions.java

@@ -0,0 +1,42 @@
+/*
+ * Copyright (c) 2020 GeyserMC. http://geysermc.org
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ *
+ * @author GeyserMC
+ * @link https://github.com/GeyserMC/Geyser
+ */
+
+package org.geysermc.platform.fabric;
+
+import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import lombok.Getter;
+
+/**
+ * A class outline of the permissions.yml file
+ */
+@JsonIgnoreProperties(ignoreUnknown = true)
+public class GeyserFabricPermissions {
+
+    @Getter
+    @JsonProperty("commands")
+    private String[] commands;
+
+}

bootstrap/fabric/src/main/java/org/geysermc/platform/fabric/ModInfo.java

@@ -23,7 +23,7 @@
  * @link https://github.com/GeyserMC/Geyser
  */
 
-package org.geysermc.platform.fabric.command;
+package org.geysermc.platform.fabric;
 
 import lombok.Getter;
 import net.fabricmc.loader.api.ModContainer;

bootstrap/fabric/src/main/java/org/geysermc/platform/fabric/command/GeyserFabricCommandExecutor.java

@@ -30,21 +30,32 @@ import com.mojang.brigadier.context.CommandContext;
 import net.minecraft.server.command.ServerCommandSource;
 import org.geysermc.connector.GeyserConnector;
 import org.geysermc.connector.command.GeyserCommand;
+import org.geysermc.connector.utils.LanguageUtils;
 
 public class GeyserFabricCommandExecutor implements Command<ServerCommandSource> {
 
     private final String commandName;
     private final GeyserConnector connector;
+    /**
+     * Whether the command requires an OP permission level of 2 or greater
+     */
+    private final boolean requiresPermission;
 
-    public GeyserFabricCommandExecutor(GeyserConnector connector, String commandName) {
+    public GeyserFabricCommandExecutor(GeyserConnector connector, String commandName, boolean requiresPermission) {
         this.commandName = commandName;
         this.connector = connector;
+        this.requiresPermission = requiresPermission;
     }
 
     @Override
     public int run(CommandContext context) {
         ServerCommandSource source = (ServerCommandSource) context.getSource();
-        getCommand(commandName).execute(new FabricCommandSender(source), new String[0]);
+        FabricCommandSender sender = new FabricCommandSender(source);
+        if (requiresPermission && !source.hasPermissionLevel(2)) {
+            sender.sendMessage(LanguageUtils.getLocaleStringLog("geyser.bootstrap.command.permission_fail"));
+            return 0;
+        }
+        getCommand(commandName).execute(sender, new String[0]);
         return 0;
     }
 

bootstrap/fabric/src/main/resources/fabric.mixins.json

@@ -1,13 +0,0 @@
-{
-  "required": true,
-  "minVersion": "0.8",
-  "package": "org.geysermc.platform.fabric.mixin",
-  "compatibilityLevel": "JAVA_8",
-  "mixins": [
-  ],
-  "client": [
-  ],
-  "injectors": {
-    "defaultRequire": 1
-  }
-}

bootstrap/fabric/src/main/resources/fabric.mod.json

@@ -19,9 +19,6 @@
       "org.geysermc.platform.fabric.GeyserFabricMod"
     ]
   },
-  "mixins": [
-    "fabric.mixins.json"
-  ],
   "depends": {
     "fabricloader": ">=0.10.1+build.209",
     "fabric": "*",

bootstrap/fabric/src/main/resources/permissions.yml

@@ -0,0 +1,10 @@
+# Uncomment any commands that you wish to be run by clients
+# Commented commands require an OP permission of 2 or greater
+commands:
+#  - dump
+  - help
+  - offhand
+#  - list
+#  - reload
+#  - shutdown
+#  - version