From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: William Blake Galbreath <Blake.Galbreath@GMail.com>
Date: Fri, 30 Apr 2021 13:39:39 -0500
Subject: [PATCH] Gamemode extra permissions


diff --git a/src/main/java/net/minecraft/commands/CommandSourceStack.java b/src/main/java/net/minecraft/commands/CommandSourceStack.java
index 2f7ed5b38e8930b3a615f160cdf4c5b0ec932a8d..08e783882d0b2ef3ebf88e664f1a3d8bf65f49f2 100644
--- a/src/main/java/net/minecraft/commands/CommandSourceStack.java
+++ b/src/main/java/net/minecraft/commands/CommandSourceStack.java
@@ -209,6 +209,19 @@ public class CommandSourceStack implements ExecutionCommandSource<CommandSourceS
     }
     // CraftBukkit end
 
+    // Purpur start
+    public boolean testPermission(int i, String bukkitPermission) {
+        if (hasPermission(i, bukkitPermission)) {
+            return true;
+        }
+        net.kyori.adventure.text.Component permissionMessage = getLevel().getServer().server.permissionMessage();
+        if (!permissionMessage.equals(net.kyori.adventure.text.Component.empty())) {
+            sendFailure(io.papermc.paper.adventure.PaperAdventure.asVanilla(permissionMessage.replaceText(net.kyori.adventure.text.TextReplacementConfig.builder().matchLiteral("<permission>").replacement(bukkitPermission).build())));
+        }
+        return false;
+    }
+    // Purpur end
+
     public Vec3 getPosition() {
         return this.worldPosition;
     }
diff --git a/src/main/java/net/minecraft/server/commands/GameModeCommand.java b/src/main/java/net/minecraft/server/commands/GameModeCommand.java
index d1da3600dc07107309b20ebe6e7c0c4da0e8de76..244b4719c689f153fa36381a60acc280bb0bd9b3 100644
--- a/src/main/java/net/minecraft/server/commands/GameModeCommand.java
+++ b/src/main/java/net/minecraft/server/commands/GameModeCommand.java
@@ -57,6 +57,18 @@ public class GameModeCommand {
     }
 
     private static int setMode(CommandContext<CommandSourceStack> context, Collection<ServerPlayer> targets, GameType gameMode) {
+        // Purpur start
+        if (org.purpurmc.purpur.PurpurConfig.commandGamemodeRequiresPermission) {
+            String gamemode = gameMode.getName();
+            CommandSourceStack sender = context.getSource();
+            if (!sender.testPermission(2, "minecraft.command.gamemode." + gamemode)) {
+                return 0;
+            }
+            if (sender.getEntity() instanceof ServerPlayer player && (targets.size() > 1 || !targets.contains(player)) && !sender.testPermission(2, "minecraft.command.gamemode." + gamemode + ".other")) {
+                return 0;
+            }
+        }
+        // Purpur end
         int i = 0;
 
         for (ServerPlayer serverPlayer : targets) {
diff --git a/src/main/java/org/bukkit/craftbukkit/util/permissions/CommandPermissions.java b/src/main/java/org/bukkit/craftbukkit/util/permissions/CommandPermissions.java
index 52649f82351ab4f675c3cc3cd6640956b0f76b91..eb51c88c7a0658190d3a8bfd5d18dca79d85fba0 100644
--- a/src/main/java/org/bukkit/craftbukkit/util/permissions/CommandPermissions.java
+++ b/src/main/java/org/bukkit/craftbukkit/util/permissions/CommandPermissions.java
@@ -23,7 +23,15 @@ public final class CommandPermissions {
         DefaultPermissions.registerPermission(CommandPermissions.PREFIX + "kick", "Allows the user to kick players", PermissionDefault.OP, commands);
         DefaultPermissions.registerPermission(CommandPermissions.PREFIX + "stop", "Allows the user to stop the server", PermissionDefault.OP, commands);
         DefaultPermissions.registerPermission(CommandPermissions.PREFIX + "list", "Allows the user to list all online players", PermissionDefault.OP, commands);
-        DefaultPermissions.registerPermission(CommandPermissions.PREFIX + "gamemode", "Allows the user to change the gamemode of another player", PermissionDefault.OP, commands);
+        // Purpur start
+        Permission gamemodeVanilla = DefaultPermissions.registerPermission(PREFIX + "gamemode", "Allows the user to change the gamemode", PermissionDefault.OP, commands);
+        for (net.minecraft.world.level.GameType gametype : net.minecraft.world.level.GameType.values()) {
+            Permission gamemodeSelf = DefaultPermissions.registerPermission(PREFIX + "gamemode." + gametype.getName(), "Allows the user to set " + gametype.getName() + " gamemode for self", PermissionDefault.OP);
+            Permission gamemodeOther = DefaultPermissions.registerPermission(PREFIX + "gamemode." + gametype.getName() + ".other", "Allows the user to set " + gametype.getName() + " gamemode for other players", PermissionDefault.OP);
+            gamemodeSelf.addParent(gamemodeOther, true);
+            gamemodeVanilla.addParent(gamemodeSelf, true);
+        }
+        // Purpur end
         DefaultPermissions.registerPermission(CommandPermissions.PREFIX + "experience", "Allows the user to give themselves or others arbitrary values of experience", PermissionDefault.OP, commands); // Paper - wrong permission; redirects are de-redirected and the root literal name is used, so xp -> experience
         DefaultPermissions.registerPermission(CommandPermissions.PREFIX + "defaultgamemode", "Allows the user to change the default gamemode of the server", PermissionDefault.OP, commands);
         DefaultPermissions.registerPermission(CommandPermissions.PREFIX + "seed", "Allows the user to view the seed of the world", PermissionDefault.OP, commands);
diff --git a/src/main/java/org/purpurmc/purpur/PurpurConfig.java b/src/main/java/org/purpurmc/purpur/PurpurConfig.java
index 499c04781546e8e0bf6d6251e0670cfcff049246..40f1a5aeea97c192488bedb00b7e565f6a32c9f1 100644
--- a/src/main/java/org/purpurmc/purpur/PurpurConfig.java
+++ b/src/main/java/org/purpurmc/purpur/PurpurConfig.java
@@ -235,6 +235,7 @@ public class PurpurConfig {
     public static String commandTPSBarTextColorMedium = "<gradient:#ffff55:#ffaa00><text></gradient>";
     public static String commandTPSBarTextColorLow = "<gradient:#ff5555:#aa0000><text></gradient>";
     public static int commandTPSBarTickInterval = 20;
+    public static boolean commandGamemodeRequiresPermission = false;
     private static void commandSettings() {
         commandTPSBarTitle = getString("settings.command.tpsbar.title", commandTPSBarTitle);
         commandTPSBarProgressOverlay = BossBar.Overlay.valueOf(getString("settings.command.tpsbar.overlay", commandTPSBarProgressOverlay.name()));
@@ -246,6 +247,7 @@ public class PurpurConfig {
         commandTPSBarTextColorMedium = getString("settings.command.tpsbar.text-color.medium", commandTPSBarTextColorMedium);
         commandTPSBarTextColorLow = getString("settings.command.tpsbar.text-color.low", commandTPSBarTextColorLow);
         commandTPSBarTickInterval = getInt("settings.command.tpsbar.tick-interval", commandTPSBarTickInterval);
+        commandGamemodeRequiresPermission = getBoolean("settings.command.gamemode.requires-specific-permission", commandGamemodeRequiresPermission);
     }
 
     public static int barrelRows = 3;