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3ab6da0e4f
Paper/Spigot-API-Patches/0087-Add-extended-PaperServerListPingEvent.patch
Aikar 17b58d00d8
Unwrap Event Exceptions 
This was a useless exception wrapper that ends up making
stack traces harder to read as well as the JVM cutting off
the important parts

Nothing catches this exception, so its safe to just get rid
of it and let the REAL exception bubble down
2019-02-23 12:17:41 -05:00

372 Zeilen
11 KiB
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Originalformat Blame Verlauf

From 62f34963ecb11533fab2828dfd058a95235bdb67 Mon Sep 17 00:00:00 2001
From: Minecrell <minecrell@minecrell.net>
Date: Wed, 11 Oct 2017 15:55:38 +0200
Subject: [PATCH] Add extended PaperServerListPingEvent
Add a new event that extends the original ServerListPingEvent
and allows full control of the response sent to the client.
diff --git a/src/main/java/com/destroystokyo/paper/event/server/PaperServerListPingEvent.java b/src/main/java/com/destroystokyo/paper/event/server/PaperServerListPingEvent.java
new file mode 100644
index 00000000..b2a8476c
--- /dev/null
+++ b/src/main/java/com/destroystokyo/paper/event/server/PaperServerListPingEvent.java
@@ -0,0 +1,320 @@
+package com.destroystokyo.paper.event.server;
+
+import static java.util.Objects.requireNonNull;
+
+import com.destroystokyo.paper.network.StatusClient;
+import com.destroystokyo.paper.profile.PlayerProfile;
+import org.bukkit.Bukkit;
+import org.bukkit.entity.Player;
+import org.bukkit.event.Cancellable;
+import org.bukkit.event.server.ServerListPingEvent;
+import org.bukkit.util.CachedServerIcon;
+
+import java.util.ArrayList;
+import java.util.Iterator;
+import java.util.List;
+import java.util.NoSuchElementException;
+import java.util.UUID;
+
+import javax.annotation.Nonnull;
+import javax.annotation.Nullable;
+
+/**
+ * Extended version of {@link ServerListPingEvent} that allows full control
+ * of the response sent to the client.
+ */
+public class PaperServerListPingEvent extends ServerListPingEvent implements Cancellable {
+
+ @Nonnull private final StatusClient client;
+
+ private int numPlayers;
+ private boolean hidePlayers;
+ @Nonnull private final List<PlayerProfile> playerSample = new ArrayList<>();
+
+ @Nonnull private String version;
+ private int protocolVersion;
+
+ @Nullable private CachedServerIcon favicon;
+
+ private boolean cancelled;
+
+ private boolean originalPlayerCount = true;
+ private Object[] players;
+
+ public PaperServerListPingEvent(@Nonnull StatusClient client, String motd, int numPlayers, int maxPlayers,
+ @Nonnull String version, int protocolVersion, @Nullable CachedServerIcon favicon) {
+ super(client.getAddress().getAddress(), motd, numPlayers, maxPlayers);
+ this.client = client;
+ this.numPlayers = numPlayers;
+ this.version = version;
+ this.protocolVersion = protocolVersion;
+ setServerIcon(favicon);
+ }
+
+ /**
+ * Returns the {@link StatusClient} pinging the server.
+ *
+ * @return The client
+ */
+ @Nonnull
+ public StatusClient getClient() {
+ return this.client;
+ }
+
+ /**
+ * {@inheritDoc}
+ *
+ * <p>Returns {@code -1} if players are hidden using
+ * {@link #shouldHidePlayers()}.</p>
+ */
+ @Override
+ public int getNumPlayers() {
+ if (this.hidePlayers) {
+ return -1;
+ }
+
+ return this.numPlayers;
+ }
+
+ /**
+ * Sets the number of players displayed in the server list.
+ *
+ * <p>Note that this won't have any effect if {@link #shouldHidePlayers()}
+ * is enabled.</p>
+ *
+ * @param numPlayers The number of online players
+ */
+ public void setNumPlayers(int numPlayers) {
+ if (this.numPlayers != numPlayers) {
+ this.numPlayers = numPlayers;
+ this.originalPlayerCount = false;
+ }
+ }
+
+ /**
+ * {@inheritDoc}
+ *
+ * <p>Returns {@code -1} if players are hidden using
+ * {@link #shouldHidePlayers()}.</p>
+ */
+ @Override
+ public int getMaxPlayers() {
+ if (this.hidePlayers) {
+ return -1;
+ }
+
+ return super.getMaxPlayers();
+ }
+
+ /**
+ * Returns whether all player related information is hidden in the server
+ * list. This will cause {@link #getNumPlayers()}, {@link #getMaxPlayers()}
+ * and {@link #getPlayerSample()} to be skipped in the response.
+ *
+ * <p>The Vanilla Minecraft client will display the player count as {@code ???}
+ * when this option is enabled.</p>
+ *
+ * @return {@code true} if the player count is hidden
+ */
+ public boolean shouldHidePlayers() {
+ return hidePlayers;
+ }
+
+ /**
+ * Sets whether all player related information is hidden in the server
+ * list. This will cause {@link #getNumPlayers()}, {@link #getMaxPlayers()}
+ * and {@link #getPlayerSample()} to be skipped in the response.
+ *
+ * <p>The Vanilla Minecraft client will display the player count as {@code ???}
+ * when this option is enabled.</p>
+ *
+ * @param hidePlayers {@code true} if the player count should be hidden
+ */
+ public void setHidePlayers(boolean hidePlayers) {
+ this.hidePlayers = hidePlayers;
+ }
+
+ /**
+ * Returns a mutable list of {@link PlayerProfile} that will be displayed
+ * as online players on the client.
+ *
+ * <p>The Vanilla Minecraft client will display them when hovering the
+ * player count with the mouse.</p>
+ *
+ * @return The mutable player sample list
+ */
+ @Nonnull
+ public List<PlayerProfile> getPlayerSample() {
+ return this.playerSample;
+ }
+
+ /**
+ * Returns the version that will be sent as server version on the client.
+ *
+ * @return The server version
+ */
+ @Nonnull
+ public String getVersion() {
+ return version;
+ }
+
+ /**
+ * Sets the version that will be sent as server version to the client.
+ *
+ * @param version The server version
+ */
+ public void setVersion(@Nonnull String version) {
+ this.version = requireNonNull(version, "version");
+ }
+
+ /**
+ * Returns the protocol version that will be sent as the protocol version
+ * of the server to the client.
+ *
+ * @return The protocol version of the server, or {@code -1} if the server
+ * has not finished initialization yet
+ */
+ public int getProtocolVersion() {
+ return protocolVersion;
+ }
+
+ /**
+ * Sets the protocol version that will be sent as the protocol version
+ * of the server to the client.
+ *
+ * @param protocolVersion The protocol version of the server
+ */
+ public void setProtocolVersion(int protocolVersion) {
+ this.protocolVersion = protocolVersion;
+ }
+
+ /**
+ * Gets the server icon sent to the client.
+ *
+ * @return The icon to send to the client, or {@code null} for none
+ */
+ @Nullable
+ public CachedServerIcon getServerIcon() {
+ return this.favicon;
+ }
+
+ /**
+ * Sets the server icon sent to the client.
+ *
+ * @param icon The icon to send to the client, or {@code null} for none
+ */
+ @Override
+ public void setServerIcon(@Nullable CachedServerIcon icon) {
+ if (icon != null && icon.isEmpty()) {
+ // Represent empty icons as null
+ icon = null;
+ }
+
+ this.favicon = icon;
+ }
+
+ /**
+ * {@inheritDoc}
+ *
+ * <p>Cancelling this event will cause the connection to be closed immediately,
+ * without sending a response to the client.</p>
+ */
+ @Override
+ public boolean isCancelled() {
+ return this.cancelled;
+ }
+
+ /**
+ * {@inheritDoc}
+ *
+ * <p>Cancelling this event will cause the connection to be closed immediately,
+ * without sending a response to the client.</p>
+ */
+ @Override
+ public void setCancelled(boolean cancel) {
+ this.cancelled = cancel;
+ }
+
+ /**
+ * {@inheritDoc}
+ *
+ * <p><b>Note:</b> For compatibility reasons, this method will return all
+ * online players, not just the ones referenced in {@link #getPlayerSample()}.
+ * Removing a player will:</p>
+ *
+ * <ul>
+ * <li>Decrement the online player count (if and only if) the player
+ * count wasn't changed by another plugin before.</li>
+ * <li>Remove all entries from {@link #getPlayerSample()} that refer to
+ * the removed player (based on their {@link UUID}).</li>
+ * </ul>
+ */
+ @Nonnull
+ @Override
+ public Iterator<Player> iterator() {
+ if (this.players == null) {
+ this.players = getOnlinePlayers();
+ }
+
+ return new PlayerIterator();
+ }
+
+ protected Object[] getOnlinePlayers() {
+ return Bukkit.getOnlinePlayers().toArray();
+ }
+
+ protected Player getBukkitPlayer(Object player) {
+ return (Player) player;
+ }
+
+ private final class PlayerIterator implements Iterator<Player> {
+
+ private int next;
+ private int current;
+ @Nullable private Player player;
+
+ @Override
+ public boolean hasNext() {
+ for (; this.next < players.length; this.next++) {
+ if (players[this.next] != null) {
+ return true;
+ }
+ }
+
+ return false;
+ }
+
+ @Override
+ public Player next() {
+ if (!hasNext()) {
+ this.player = null;
+ throw new NoSuchElementException();
+ }
+
+ this.current = this.next++;
+ return this.player = getBukkitPlayer(players[this.current]);
+ }
+
+ @Override
+ public void remove() {
+ if (this.player == null) {
+ throw new IllegalStateException();
+ }
+
+ UUID uniqueId = this.player.getUniqueId();
+ this.player = null;
+
+ // Remove player from iterator
+ players[this.current] = null;
+
+ // Remove player from sample
+ getPlayerSample().removeIf(p -> uniqueId.equals(p.getId()));
+
+ // Decrement player count
+ if (originalPlayerCount) {
+ numPlayers--;
+ }
+ }
+ }
+
+}
diff --git a/src/main/java/com/destroystokyo/paper/network/StatusClient.java b/src/main/java/com/destroystokyo/paper/network/StatusClient.java
new file mode 100644
index 00000000..517d1523
--- /dev/null
+++ b/src/main/java/com/destroystokyo/paper/network/StatusClient.java
@@ -0,0 +1,13 @@
+package com.destroystokyo.paper.network;
+
+import com.destroystokyo.paper.event.server.PaperServerListPingEvent;
+
+/**
+ * Represents a client requesting the current status from the server (e.g. from
+ * the server list).
+ *
+ * @see PaperServerListPingEvent
+ */
+public interface StatusClient extends NetworkClient {
+
+}
diff --git a/src/main/java/org/bukkit/util/CachedServerIcon.java b/src/main/java/org/bukkit/util/CachedServerIcon.java
index 04804706..44563482 100644
--- a/src/main/java/org/bukkit/util/CachedServerIcon.java
+++ b/src/main/java/org/bukkit/util/CachedServerIcon.java
@@ -14,4 +14,10 @@ import org.bukkit.event.server.ServerListPingEvent;
*/
public interface CachedServerIcon {
public String getData(); // Spigot
+
+ // Paper start
+ default boolean isEmpty() {
+ return getData() == null;
+ }
+ // Paper end
}
--
2.20.1
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