Paper/patches/server/0834-Implement-PlayerFailMoveEvent.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Moulberry <james.jenour@protonmail.com>
Date: Wed, 26 Jul 2023 20:13:31 +0800
Subject: [PATCH] Implement PlayerFailMoveEvent


diff --git a/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java b/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
index 919b0ffb69720b3edeb9d25c7f41291a09976505..134d9fbdb757094a4624325c0ad8f32efadd61b6 100644
--- a/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
+++ b/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
@@ -1271,8 +1271,8 @@ public class ServerGamePacketListenerImpl extends ServerCommonPacketListenerImpl
                     double d0 = ServerGamePacketListenerImpl.clampHorizontal(packet.getX(this.player.getX())); final double toX = d0; // Paper - OBFHELPER
                     double d1 = ServerGamePacketListenerImpl.clampVertical(packet.getY(this.player.getY())); final double toY = d1; // Paper - OBFHELPER
                     double d2 = ServerGamePacketListenerImpl.clampHorizontal(packet.getZ(this.player.getZ())); final double toZ = d2; // Paper - OBFHELPER
-                    float f = Mth.wrapDegrees(packet.getYRot(this.player.getYRot()));
-                    float f1 = Mth.wrapDegrees(packet.getXRot(this.player.getXRot()));
+                    float f = Mth.wrapDegrees(packet.getYRot(this.player.getYRot())); final float toYaw = f; // Paper - OBFHELPER
+                    float f1 = Mth.wrapDegrees(packet.getXRot(this.player.getXRot())); final float toPitch = f1; // Paper - OBFHELPER
 
                     if (this.player.isPassenger()) {
                         this.player.absMoveTo(this.player.getX(), this.player.getY(), this.player.getZ(), f, f1);
@@ -1339,8 +1339,14 @@ public class ServerGamePacketListenerImpl extends ServerCommonPacketListenerImpl
                                 }
                                 // Paper start - Prevent moving into unloaded chunks
                                 if (this.player.level().paperConfig().chunks.preventMovingIntoUnloadedChunks && (this.player.getX() != toX || this.player.getZ() != toZ) && !worldserver.areChunksLoadedForMove(this.player.getBoundingBox().expandTowards(new Vec3(toX, toY, toZ).subtract(this.player.position())))) {
-                                    this.internalTeleport(PositionMoveRotation.of(this.player), Collections.emptySet());
-                                    return;
+                                    // Paper start - Add fail move event
+                                    io.papermc.paper.event.player.PlayerFailMoveEvent event = fireFailMove(io.papermc.paper.event.player.PlayerFailMoveEvent.FailReason.MOVED_INTO_UNLOADED_CHUNK,
+                                        toX, toY, toZ, toYaw, toPitch, false);
+                                    if (!event.isAllowed()) {
+                                        this.internalTeleport(PositionMoveRotation.of(this.player), Collections.emptySet());
+                                        return;
+                                    }
+                                    // Paper end - Add fail move event
                                 }
                                 // Paper end - Prevent moving into unloaded chunks
 
@@ -1349,9 +1355,16 @@ public class ServerGamePacketListenerImpl extends ServerCommonPacketListenerImpl
 
                                     if (d10 - d9 > Math.max(f2, Math.pow((double) (org.spigotmc.SpigotConfig.movedTooQuicklyMultiplier * (float) i * speed), 2))) {
                                     // CraftBukkit end
-                                        ServerGamePacketListenerImpl.LOGGER.warn("{} moved too quickly! {},{},{}", new Object[]{this.player.getName().getString(), d6, d7, d8});
-                                        this.teleport(this.player.getX(), this.player.getY(), this.player.getZ(), this.player.getYRot(), this.player.getXRot());
-                                        return;
+                                        // Paper start - Add fail move event
+                                        io.papermc.paper.event.player.PlayerFailMoveEvent event = fireFailMove(io.papermc.paper.event.player.PlayerFailMoveEvent.FailReason.MOVED_TOO_QUICKLY,
+                                            toX, toY, toZ, toYaw, toPitch, true);
+                                        if (!event.isAllowed()) {
+                                            if (event.getLogWarning())
+                                                ServerGamePacketListenerImpl.LOGGER.warn("{} moved too quickly! {},{},{}", new Object[]{this.player.getName().getString(), d6, d7, d8});
+                                            this.teleport(this.player.getX(), this.player.getY(), this.player.getZ(), this.player.getYRot(), this.player.getXRot());
+                                            return;
+                                        }
+                                        // Paper end - Add fail move event
                                     }
                                 }
                             }
@@ -1413,14 +1426,31 @@ public class ServerGamePacketListenerImpl extends ServerCommonPacketListenerImpl
 
                             d8 = d2 - this.player.getZ();
                             d10 = d6 * d6 + d7 * d7 + d8 * d8;
-                            boolean flag3 = false;
+                            boolean movedWrongly = false; // Paper - Add fail move event; rename
 
                             if (!this.player.isChangingDimension() && d10 > org.spigotmc.SpigotConfig.movedWronglyThreshold && !this.player.isSleeping() && !this.player.gameMode.isCreative() && this.player.gameMode.getGameModeForPlayer() != GameType.SPECTATOR) { // Spigot
-                                flag3 = true;
+                                // Paper start - Add fail move event
+                                io.papermc.paper.event.player.PlayerFailMoveEvent event = fireFailMove(io.papermc.paper.event.player.PlayerFailMoveEvent.FailReason.MOVED_WRONGLY,
+                                    toX, toY, toZ, toYaw, toPitch, true);
+                                if (!event.isAllowed()) {
+                                    movedWrongly = true;
+                                    if (event.getLogWarning())
+                                // Paper end
                                 ServerGamePacketListenerImpl.LOGGER.warn("{} moved wrongly!", this.player.getName().getString());
+                                } // Paper
                             }
 
-                            if (!this.player.noPhysics && !this.player.isSleeping() && (flag3 && worldserver.noCollision(this.player, axisalignedbb) || this.isPlayerCollidingWithAnythingNew(worldserver, axisalignedbb, d0, d1, d2))) {
+                            // Paper start - Add fail move event
+                            boolean teleportBack = !this.player.noPhysics && !this.player.isSleeping() && (movedWrongly && worldserver.noCollision(this.player, axisalignedbb) || this.isPlayerCollidingWithAnythingNew(worldserver, axisalignedbb, d0, d1, d2));
+                            if (teleportBack) {
+                                io.papermc.paper.event.player.PlayerFailMoveEvent event = fireFailMove(io.papermc.paper.event.player.PlayerFailMoveEvent.FailReason.CLIPPED_INTO_BLOCK,
+                                    toX, toY, toZ, toYaw, toPitch, false);
+                                if (event.isAllowed()) {
+                                    teleportBack = false;
+                                }
+                            }
+                            if (teleportBack) {
+                            // Paper end - Add fail move event
                                 this.internalTeleport(d3, d4, d5, f, f1); // CraftBukkit - SPIGOT-1807: Don't call teleport event, when the client thinks the player is falling, because the chunks are not loaded on the client yet.
                                 this.player.doCheckFallDamage(this.player.getX() - d3, this.player.getY() - d4, this.player.getZ() - d5, packet.isOnGround());
                             } else {
@@ -3534,4 +3564,17 @@ public class ServerGamePacketListenerImpl extends ServerCommonPacketListenerImpl
 
         InteractionResult run(ServerPlayer player, Entity entity, InteractionHand hand);
     }
+
+    // Paper start - Add fail move event
+    private io.papermc.paper.event.player.PlayerFailMoveEvent fireFailMove(io.papermc.paper.event.player.PlayerFailMoveEvent.FailReason failReason,
+                                                                           double toX, double toY, double toZ, float toYaw, float toPitch, boolean logWarning) {
+        Player player = this.getCraftPlayer();
+        Location from = new Location(player.getWorld(), this.lastPosX, this.lastPosY, this.lastPosZ, this.lastYaw, this.lastPitch);
+        Location to = new Location(player.getWorld(), toX, toY, toZ, toYaw, toPitch);
+        io.papermc.paper.event.player.PlayerFailMoveEvent event = new io.papermc.paper.event.player.PlayerFailMoveEvent(player, failReason,
+            false, logWarning, from, to);
+        event.callEvent();
+        return event;
+    }
+    // Paper end - Add fail move event
 }