Paper/patches/server/0879-Fix-cmd-permission-levels-for-command-blocks.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Jake Potrebic <jake.m.potrebic@gmail.com>
Date: Mon, 24 Jan 2022 15:32:02 -0800
Subject: [PATCH] Fix cmd permission levels for command blocks


diff --git a/src/main/java/net/minecraft/commands/CommandSourceStack.java b/src/main/java/net/minecraft/commands/CommandSourceStack.java
index 907bc9d84dbc98427384cf529bfde4b09d8ce8ca..faa375f2722793a86265248a4be4fa14736d9818 100644
--- a/src/main/java/net/minecraft/commands/CommandSourceStack.java
+++ b/src/main/java/net/minecraft/commands/CommandSourceStack.java
@@ -204,10 +204,29 @@ public class CommandSourceStack implements ExecutionCommandSource<CommandSourceS
         return this.permissionLevel >= level;
     }
 
+    // Paper start - Fix permission levels for command blocks
+    private boolean forceRespectPermissionLevel() {
+        return this.source == CommandSource.NULL || (this.source instanceof final net.minecraft.world.level.BaseCommandBlock commandBlock && commandBlock.getLevel().paperConfig().commandBlocks.forceFollowPermLevel);
+    }
+    // Paper end - Fix permission levels for command blocks
+
     // CraftBukkit start
     public boolean hasPermission(int i, String bukkitPermission) {
-        // World is null when loading functions
-        return ((this.getLevel() == null || !this.getLevel().getCraftServer().ignoreVanillaPermissions) && this.permissionLevel >= i) || this.getBukkitSender().hasPermission(bukkitPermission);
+        // Paper start - Fix permission levels for command blocks
+        final java.util.function.BooleanSupplier hasBukkitPerm = () -> this.source == CommandSource.NULL /*treat NULL as having all bukkit perms*/ || this.getBukkitSender().hasPermission(bukkitPermission); // lazily check bukkit perms to the benefit of custom permission setups
+        // if the server is null, we must check the vanilla perm level system
+        // if ignoreVanillaPermissions is true, we can skip vanilla perms and just run the bukkit perm check
+        //noinspection ConstantValue
+        if (this.getServer() == null || !this.getServer().server.ignoreVanillaPermissions) { // server & level are null for command function loading
+            final boolean hasPermLevel = this.permissionLevel >= i;
+            if (this.forceRespectPermissionLevel()) { // NULL CommandSource and command blocks (if setting is enabled) should always pass the vanilla perm check
+                return hasPermLevel && hasBukkitPerm.getAsBoolean();
+            } else { // otherwise check vanilla perm first then bukkit perm, matching upstream behavior
+                return hasPermLevel || hasBukkitPerm.getAsBoolean();
+            }
+        }
+        return hasBukkitPerm.getAsBoolean();
+        // Paper end - Fix permission levels for command blocks
     }
     // CraftBukkit end
 
diff --git a/src/main/java/net/minecraft/commands/Commands.java b/src/main/java/net/minecraft/commands/Commands.java
index dd7c1ac97505ce7a846aa8ee91bb654d060acc1a..df06c28c778255cb2d8d5e14960bd38a2af9ad22 100644
--- a/src/main/java/net/minecraft/commands/Commands.java
+++ b/src/main/java/net/minecraft/commands/Commands.java
@@ -296,16 +296,7 @@ public class Commands {
         String[] args = command.split(" ");
         if (args.length == 0) return; // Paper - empty commands shall not be dispatched
 
-        String cmd = args[0];
-        if (cmd.startsWith("minecraft:")) cmd = cmd.substring("minecraft:".length());
-        if (cmd.startsWith("bukkit:")) cmd = cmd.substring("bukkit:".length());
-
-        // Block disallowed commands
-        if (cmd.equalsIgnoreCase("stop") || cmd.equalsIgnoreCase("kick") || cmd.equalsIgnoreCase("op")
-                || cmd.equalsIgnoreCase("deop") || cmd.equalsIgnoreCase("ban") || cmd.equalsIgnoreCase("ban-ip")
-                || cmd.equalsIgnoreCase("pardon") || cmd.equalsIgnoreCase("pardon-ip") || cmd.equalsIgnoreCase("reload")) {
-            return;
-        }
+        // Paper - Fix permission levels for command blocks
 
         // Handle vanilla commands;
         if (sender.getLevel().getCraftServer().getCommandBlockOverride(args[0])) {
diff --git a/src/main/java/net/minecraft/world/entity/vehicle/MinecartCommandBlock.java b/src/main/java/net/minecraft/world/entity/vehicle/MinecartCommandBlock.java
index 48b4fe75a7f881e7713885d79d4ef5ec7b574a2d..88b00556322f078b8a9d28fb7c759bb8c84bfcf0 100644
--- a/src/main/java/net/minecraft/world/entity/vehicle/MinecartCommandBlock.java
+++ b/src/main/java/net/minecraft/world/entity/vehicle/MinecartCommandBlock.java
@@ -136,7 +136,7 @@ public class MinecartCommandBlock extends AbstractMinecart {
 
         @Override
         public CommandSourceStack createCommandSourceStack() {
-            return new CommandSourceStack(this, MinecartCommandBlock.this.position(), MinecartCommandBlock.this.getRotationVector(), this.getLevel(), 2, this.getName().getString(), MinecartCommandBlock.this.getDisplayName(), this.getLevel().getServer(), MinecartCommandBlock.this);
+            return new CommandSourceStack(this, MinecartCommandBlock.this.position(), MinecartCommandBlock.this.getRotationVector(), this.getLevel(), this.getLevel().paperConfig().commandBlocks.permissionsLevel, this.getName().getString(), MinecartCommandBlock.this.getDisplayName(), this.getLevel().getServer(), MinecartCommandBlock.this); // Paper - configurable command block perm level
         }
 
         @Override
diff --git a/src/main/java/net/minecraft/world/level/block/entity/CommandBlockEntity.java b/src/main/java/net/minecraft/world/level/block/entity/CommandBlockEntity.java
index 167f334eec90417eba05fcecec21435415771df7..f08c77e20462bada221b5ed395ceb2f7d39ee7c0 100644
--- a/src/main/java/net/minecraft/world/level/block/entity/CommandBlockEntity.java
+++ b/src/main/java/net/minecraft/world/level/block/entity/CommandBlockEntity.java
@@ -54,7 +54,7 @@ public class CommandBlockEntity extends BlockEntity {
         public CommandSourceStack createCommandSourceStack() {
             Direction enumdirection = (Direction) CommandBlockEntity.this.getBlockState().getValue(CommandBlock.FACING);
 
-            return new CommandSourceStack(this, Vec3.atCenterOf(CommandBlockEntity.this.worldPosition), new Vec2(0.0F, enumdirection.toYRot()), this.getLevel(), 2, this.getName().getString(), this.getName(), this.getLevel().getServer(), (Entity) null);
+            return new CommandSourceStack(this, Vec3.atCenterOf(CommandBlockEntity.this.worldPosition), new Vec2(0.0F, enumdirection.toYRot()), this.getLevel(), this.getLevel().paperConfig().commandBlocks.permissionsLevel, this.getName().getString(), this.getName(), this.getLevel().getServer(), (Entity) null); // Paper - configurable command block perm level
         }
 
         @Override