Paper/patches/api/0036-Add-handshake-event-to-allow-plugins-to-handle-clien.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: kashike <kashike@vq.lc>
Date: Wed, 13 Apr 2016 20:20:18 -0700
Subject: [PATCH] Add handshake event to allow plugins to handle client
 handshaking logic themselves


diff --git a/src/main/java/com/destroystokyo/paper/event/player/PlayerHandshakeEvent.java b/src/main/java/com/destroystokyo/paper/event/player/PlayerHandshakeEvent.java
new file mode 100644
index 0000000000000000000000000000000000000000..aea04fb357f5728195fd9c9bdcd6304a0b953c45
--- /dev/null
+++ b/src/main/java/com/destroystokyo/paper/event/player/PlayerHandshakeEvent.java
@@ -0,0 +1,257 @@
+package com.destroystokyo.paper.event.player;
+
+import com.google.common.base.Preconditions;
+import java.util.UUID;
+import net.kyori.adventure.text.Component;
+import net.kyori.adventure.text.format.NamedTextColor;
+import net.kyori.adventure.text.serializer.legacy.LegacyComponentSerializer;
+import org.bukkit.event.Cancellable;
+import org.bukkit.event.Event;
+import org.bukkit.event.HandlerList;
+import org.jetbrains.annotations.ApiStatus;
+import org.jspecify.annotations.NullMarked;
+import org.jspecify.annotations.Nullable;
+
+/**
+ * This event is fired during a player handshake.
+ * <p>
+ * If there are no listeners listening to this event, the logic default
+ * to your server platform will be run.
+ *
+ * <p>WARNING: TAMPERING WITH THIS EVENT CAN BE DANGEROUS</p>
+ */
+@NullMarked
+public class PlayerHandshakeEvent extends Event implements Cancellable {
+
+    private static final HandlerList HANDLER_LIST = new HandlerList();
+
+    private final String originalHandshake;
+    private final String originalSocketAddressHostname;
+    private @Nullable String serverHostname;
+    private @Nullable String socketAddressHostname;
+    private @Nullable UUID uniqueId;
+    private @Nullable String propertiesJson;
+    private boolean failed;
+    private Component failMessage = Component.text("If you wish to use IP forwarding, please enable it in your BungeeCord config as well!", NamedTextColor.YELLOW);
+
+    private boolean cancelled;
+
+    @Deprecated
+    @ApiStatus.Internal
+    public PlayerHandshakeEvent(final String originalHandshake, final boolean cancelled) {
+        this(originalHandshake, "127.0.0.1", cancelled);
+    }
+
+    @ApiStatus.Internal
+    public PlayerHandshakeEvent(final String originalHandshake, final String originalSocketAddressHostname, final boolean cancelled) {
+        super(true);
+        this.originalHandshake = originalHandshake;
+        this.originalSocketAddressHostname = originalSocketAddressHostname;
+        this.cancelled = cancelled;
+    }
+
+    /**
+     * Determines if this event is cancelled.
+     * <p>
+     * When this event is cancelled, custom handshake logic will not
+     * be processed.
+     *
+     * @return {@code true} if this event is cancelled, {@code false} otherwise
+     */
+    @Override
+    public boolean isCancelled() {
+        return this.cancelled;
+    }
+
+    /**
+     * Sets if this event is cancelled.
+     * <p>
+     * When this event is cancelled, custom handshake logic will not
+     * be processed.
+     *
+     * @param cancel {@code true} if this event is cancelled, {@code false} otherwise
+     */
+    @Override
+    public void setCancelled(final boolean cancel) {
+        this.cancelled = cancel;
+    }
+
+    /**
+     * Gets the original handshake string.
+     *
+     * @return the original handshake string
+     */
+    public String getOriginalHandshake() {
+        return this.originalHandshake;
+    }
+
+    /**
+     * Gets the original socket address hostname.
+     *
+     * <p>This does not include the port.</p>
+     * <p>In cases where this event is manually fired and the plugin wasn't updated yet, the default is {@code "127.0.0.1"}.</p>
+     *
+     * @return the original socket address hostname
+     */
+    public String getOriginalSocketAddressHostname() {
+        return this.originalSocketAddressHostname;
+    }
+
+    /**
+     * Gets the server hostname string.
+     *
+     * <p>This should not include the port.</p>
+     *
+     * @return the server hostname string
+     */
+    public @Nullable String getServerHostname() {
+        return this.serverHostname;
+    }
+
+    /**
+     * Sets the server hostname string.
+     *
+     * <p>This should not include the port.</p>
+     *
+     * @param serverHostname the server hostname string
+     */
+    public void setServerHostname(final String serverHostname) {
+        this.serverHostname = serverHostname;
+    }
+
+    /**
+     * Gets the socket address hostname string.
+     *
+     * <p>This should not include the port.</p>
+     *
+     * @return the socket address hostname string
+     */
+    public @Nullable String getSocketAddressHostname() {
+        return this.socketAddressHostname;
+    }
+
+    /**
+     * Sets the socket address hostname string.
+     *
+     * <p>This should not include the port.</p>
+     *
+     * @param socketAddressHostname the socket address hostname string
+     */
+    public void setSocketAddressHostname(final String socketAddressHostname) {
+        this.socketAddressHostname = socketAddressHostname;
+    }
+
+    /**
+     * Gets the unique id.
+     *
+     * @return the unique id
+     */
+    public @Nullable UUID getUniqueId() {
+        return this.uniqueId;
+    }
+
+    /**
+     * Sets the unique id.
+     *
+     * @param uniqueId the unique id
+     */
+    public void setUniqueId(final UUID uniqueId) {
+        this.uniqueId = uniqueId;
+    }
+
+    /**
+     * Gets the profile properties.
+     *
+     * <p>This should be a valid JSON string.</p>
+     *
+     * @return the profile properties, as JSON
+     */
+    public @Nullable String getPropertiesJson() {
+        return this.propertiesJson;
+    }
+
+    /**
+     * Determines if authentication failed.
+     * <p>
+     * When {@code true}, the client connecting will be disconnected
+     * with the {@link #getFailMessage() fail message}.
+     *
+     * @return {@code true} if authentication failed, {@code false} otherwise
+     */
+    public boolean isFailed() {
+        return this.failed;
+    }
+
+    /**
+     * Sets if authentication failed and the client should be disconnected.
+     * <p>
+     * When {@code true}, the client connecting will be disconnected
+     * with the {@link #getFailMessage() fail message}.
+     *
+     * @param failed {@code true} if authentication failed, {@code false} otherwise
+     */
+    public void setFailed(final boolean failed) {
+        this.failed = failed;
+    }
+
+    /**
+     * Sets the profile properties.
+     *
+     * <p>This should be a valid JSON string.</p>
+     *
+     * @param propertiesJson the profile properties, as JSON
+     */
+    public void setPropertiesJson(final String propertiesJson) {
+        this.propertiesJson = propertiesJson;
+    }
+
+    /**
+     * Gets the message to display to the client when authentication fails.
+     *
+     * @return the message to display to the client
+     */
+    public Component failMessage() {
+        return this.failMessage;
+    }
+
+    /**
+     * Sets the message to display to the client when authentication fails.
+     *
+     * @param failMessage the message to display to the client
+     */
+    public void failMessage(final Component failMessage) {
+        this.failMessage = failMessage;
+    }
+
+    /**
+     * Gets the message to display to the client when authentication fails.
+     *
+     * @return the message to display to the client
+     * @deprecated use {@link #failMessage()}
+     */
+    @Deprecated
+    public String getFailMessage() {
+        return LegacyComponentSerializer.legacySection().serialize(this.failMessage());
+    }
+
+    /**
+     * Sets the message to display to the client when authentication fails.
+     *
+     * @param failMessage the message to display to the client
+     * @deprecated use {@link #failMessage(Component)}
+     */
+    @Deprecated
+    public void setFailMessage(final String failMessage) {
+        Preconditions.checkArgument(failMessage != null && !failMessage.isEmpty(), "fail message cannot be null or empty");
+        this.failMessage(LegacyComponentSerializer.legacySection().deserialize(failMessage));
+    }
+
+    @Override
+    public HandlerList getHandlers() {
+        return HANDLER_LIST;
+    }
+
+    public static HandlerList getHandlerList() {
+        return HANDLER_LIST;
+    }
+}