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..a077962fa786a3291849abfa823c7f0ec4664fce
--- /dev/null
+++ b/src/main/java/com/destroystokyo/paper/event/player/PlayerHandshakeEvent.java
@@ -0,0 +1,277 @@
+package com.destroystokyo.paper.event.player;
+
+import net.kyori.adventure.text.Component;
+import net.kyori.adventure.text.format.NamedTextColor;
+import org.apache.commons.lang.Validate;
+import org.bukkit.Bukkit;
+import org.bukkit.event.Cancellable;
+import org.bukkit.event.Event;
+import org.bukkit.event.HandlerList;
+
+import java.util.UUID;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.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 ran.</p>
+ *
+ * <p>WARNING: TAMPERING WITH THIS EVENT CAN BE DANGEROUS</p>
+ */
+public class PlayerHandshakeEvent extends Event implements Cancellable {
+
+    private static final HandlerList HANDLERS = new HandlerList();
+    @NotNull private final String originalHandshake;
+    @NotNull private final String originalSocketAddressHostname;
+    private boolean cancelled;
+    @Nullable private String serverHostname;
+    @Nullable private String socketAddressHostname;
+    @Nullable private UUID uniqueId;
+    @Nullable private 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);
+
+    /**
+     * Creates a new {@link PlayerHandshakeEvent}.
+     *
+     * @param originalHandshake the original handshake string
+     * @param cancelled if this event is enabled
+     *
+     * @deprecated in favour of {@link PlayerHandshakeEvent(String, String, boolean)}
+     */
+    @Deprecated
+    public PlayerHandshakeEvent(@NotNull String originalHandshake, boolean cancelled) {
+        this(originalHandshake, "127.0.0.1", cancelled);
+    }
+
+    /**
+     * Creates a new {@link PlayerHandshakeEvent}.
+     *
+     * @param originalHandshake the original handshake string
+     * @param originalSocketAddressHostname the original socket address hostname
+     * @param cancelled if this event is enabled
+     */
+    public PlayerHandshakeEvent(@NotNull String originalHandshake, @NotNull String originalSocketAddressHostname, 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.</p>
+     *
+     * @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.</p>
+     *
+     * @param cancelled {@code true} if this event is cancelled, {@code false} otherwise
+     */
+    @Override
+    public void setCancelled(boolean cancelled) {
+        this.cancelled = cancelled;
+    }
+
+    /**
+     * Gets the original handshake string.
+     *
+     * @return the original handshake string
+     */
+    @NotNull
+    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
+     */
+    @NotNull
+    public String getOriginalSocketAddressHostname() {
+        return this.originalSocketAddressHostname;
+    }
+
+    /**
+     * Gets the server hostname string.
+     *
+     * <p>This should not include the port.</p>
+     *
+     * @return the server hostname string
+     */
+    @Nullable
+    public 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(@NotNull 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
+     */
+    @Nullable
+    public 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(@NotNull String socketAddressHostname) {
+        this.socketAddressHostname = socketAddressHostname;
+    }
+
+    /**
+     * Gets the unique id.
+     *
+     * @return the unique id
+     */
+    @Nullable
+    public UUID getUniqueId() {
+        return this.uniqueId;
+    }
+
+    /**
+     * Sets the unique id.
+     *
+     * @param uniqueId the unique id
+     */
+    public void setUniqueId(@NotNull UUID uniqueId) {
+        this.uniqueId = uniqueId;
+    }
+
+    /**
+     * Gets the profile properties.
+     *
+     * <p>This should be a valid JSON string.</p>
+     *
+     * @return the profile properties, as JSON
+     */
+    @Nullable
+    public 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}.</p>
+     *
+     * @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}.</p>
+     *
+     * @param failed {@code true} if authentication failed, {@code false} otherwise
+     */
+    public void setFailed(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(@NotNull String propertiesJson) {
+        this.propertiesJson = propertiesJson;
+    }
+
+    /**
+     * Gets the message to display to the client when authentication fails.
+     *
+     * @return the message to display to the client
+     */
+    @NotNull
+    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(@NotNull 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()}
+     */
+    @NotNull
+    @Deprecated
+    public String getFailMessage() {
+        return Bukkit.getUnsafe().legacyComponentSerializer().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(@NotNull String failMessage) {
+        Validate.notEmpty(failMessage, "fail message cannot be null or empty");
+        this.failMessage(Bukkit.getUnsafe().legacyComponentSerializer().deserialize(failMessage));
+    }
+
+    @NotNull
+    @Override
+    public HandlerList getHandlers() {
+        return HANDLERS;
+    }
+
+    @NotNull
+    public static HandlerList getHandlerList() {
+        return HANDLERS;
+    }
+}
