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Fix HelpCommand searching (#11066)

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Prevent a IOB exception when querying topic
suggestions on query string `/`.

Additionally hide help topics indices if no topics
are visible to the player requesting them.
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Tamion 2024-07-15 12:42:10 +02:00 committed by GitHub
parent 9fd5b3cfbd
commit 8b35adca88
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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Tamion <70228790+notTamion@users.noreply.github.com>
Date: Sat, 13 Jul 2024 18:00:37 +0200
Subject: [PATCH] Fix HelpCommand searching
Prevent index out of bounds exception when finding possible matches in
the help topics.
A general empty string is caught and directed to the defaultTopic by
getHelpTopic(). #findPossibleMatches hence should not concern itself
with possible empty strings anymore.
diff --git a/src/main/java/org/bukkit/command/defaults/HelpCommand.java b/src/main/java/org/bukkit/command/defaults/HelpCommand.java
index a1699aa93c62f70238822c446326ed46ea71db14..9c63d9dedb08f88eb14cff26ee44d6d101935177 100644
--- a/src/main/java/org/bukkit/command/defaults/HelpCommand.java
+++ b/src/main/java/org/bukkit/command/defaults/HelpCommand.java
@@ -143,6 +143,7 @@ public class HelpCommand extends BukkitCommand {
searchString = searchString.substring(1);
}
+ if (searchString.isEmpty()) return null; // Paper - prevent index out of bounds - nothing matches an empty search string, should have been special cased to defaultTopic earlier, just return null.
for (HelpTopic topic : Bukkit.getServer().getHelpMap().getHelpTopics()) {
String trimmedTopic = topic.getName().startsWith("/") ? topic.getName().substring(1) : topic.getName();
diff --git a/src/main/java/org/bukkit/help/IndexHelpTopic.java b/src/main/java/org/bukkit/help/IndexHelpTopic.java
index 88a812d66b7eea7389103b9c2776a8adcfc141c7..74795eb1a5dacaca61ed1c918074e79f2b3d9040 100644
--- a/src/main/java/org/bukkit/help/IndexHelpTopic.java
+++ b/src/main/java/org/bukkit/help/IndexHelpTopic.java
@@ -49,10 +49,15 @@ public class IndexHelpTopic extends HelpTopic {
if (sender instanceof ConsoleCommandSender) {
return true;
}
- if (permission == null) {
- return true;
+ // Paper start - Fix HelpCommand searching - do not show index if no topic is visible to the sender
+ if (permission != null && !sender.hasPermission(permission)) return false; // old spigot permission check
+
+ for (HelpTopic topic : allTopics) {
+ if (topic.canSee(sender)) return true;
}
- return sender.hasPermission(permission);
+
+ return false;
+ // Paper end - Fix HelpCommand searching - do not show index if no topic is visible to the sender
}
@Override