Paper/nms-patches/PortalTravelAgent.patch

--- a/net/minecraft/server/PortalTravelAgent.java
+++ b/net/minecraft/server/PortalTravelAgent.java
@@ -17,13 +17,20 @@
         this.b = new Random(worldserver.getSeed());
     }
 
-    public boolean a(Entity entity, float f) {
+    public boolean a(Entity entity, float f) { // PAIL: rename to findAndTeleport
+        // CraftBukkit start
+        return findAndTeleport(entity, new BlockPosition(entity), f, 128, false) != null;
+    }
+
+    public ShapeDetector.Shape findAndTeleport(Entity entity, BlockPosition findPosition, float f, int searchRadius, boolean searchOnly) {
+        // CraftBukkit end
         Vec3D vec3d = entity.getPortalOffset();
         EnumDirection enumdirection = entity.getPortalDirection();
-        ShapeDetector.Shape shapedetector_shape = this.a(new BlockPosition(entity), entity.getMot(), enumdirection, vec3d.x, vec3d.y, entity instanceof EntityHuman);
+        ShapeDetector.Shape shapedetector_shape = this.findPortal(findPosition, entity.getMot(), enumdirection, vec3d.x, vec3d.y, entity instanceof EntityHuman, searchRadius); // CraftBukkit - add location and searchRadius
+        if (searchOnly) return shapedetector_shape; // CraftBukkit - optional teleporting
 
         if (shapedetector_shape == null) {
-            return false;
+            return null; // CraftBukkit - return shape
         } else {
             Vec3D vec3d1 = shapedetector_shape.position;
             Vec3D vec3d2 = shapedetector_shape.velocity;
@@ -31,19 +38,26 @@
             entity.setMot(vec3d2);
             entity.yaw = f + (float) shapedetector_shape.yaw;
             entity.b(vec3d1.x, vec3d1.y, vec3d1.z);
-            return true;
+            return shapedetector_shape; // CraftBukkit - return shape
         }
     }
 
     @Nullable
-    public ShapeDetector.Shape a(BlockPosition blockposition, Vec3D vec3d, EnumDirection enumdirection, double d0, double d1, boolean flag) {
+    public ShapeDetector.Shape a(BlockPosition blockposition, Vec3D vec3d, EnumDirection enumdirection, double d0, double d1, boolean flag) { // PAIL: rename to findPortal, d0 = portal offset x, d1 = portal offset z, flag = instanceof EntityHuman
+        // CraftBukkit start
+        return findPortal(blockposition, vec3d, enumdirection, d0, d1, flag, 128);
+    }
+
+    @Nullable
+    public ShapeDetector.Shape findPortal(BlockPosition blockposition, Vec3D vec3d, EnumDirection enumdirection, double d0, double d1, boolean flag, int searchRadius) {
+        // CraftBukkit end
         VillagePlace villageplace = this.world.B();
 
         villageplace.a(this.world, blockposition, 128);
         List<VillagePlaceRecord> list = (List) villageplace.b((villageplacetype) -> {
             return villageplacetype == VillagePlaceType.u;
-        }, blockposition, 128, VillagePlace.Occupancy.ANY).collect(Collectors.toList());
-        Optional<VillagePlaceRecord> optional = list.stream().min(Comparator.comparingDouble((villageplacerecord) -> {
+        }, blockposition, searchRadius, VillagePlace.Occupancy.ANY).collect(Collectors.toList()); // CraftBukkit - searchRadius
+        Optional<VillagePlaceRecord> optional = list.stream().min(Comparator.<VillagePlaceRecord>comparingDouble((villageplacerecord) -> { // CraftBukkit - decompile error
             return villageplacerecord.f().m(blockposition);
         }).thenComparingInt((villageplacerecord) -> {
             return villageplacerecord.f().getY();
@@ -56,15 +70,23 @@
             ShapeDetector.ShapeDetectorCollection shapedetector_shapedetectorcollection = BlockPortal.c((GeneratorAccess) this.world, blockposition1);
 
             return shapedetector_shapedetectorcollection.a(enumdirection, blockposition1, d1, vec3d, d0);
-        }).orElse((Object) null);
+        }).orElse(null); // CraftBukkit - decompile error
+    }
+
+    public boolean a(Entity entity) { // PAIL: rename to createPortal
+        // CraftBukkit start - providable position and creation radius
+        return createPortal(entity, new BlockPosition(entity), 16);
     }
 
-    public boolean a(Entity entity) {
+    public boolean createPortal(Entity entity, BlockPosition createPosition, int createRadius) {
+        // CraftBukkit end
         boolean flag = true;
         double d0 = -1.0D;
-        int i = MathHelper.floor(entity.locX());
-        int j = MathHelper.floor(entity.locY());
-        int k = MathHelper.floor(entity.locZ());
+        // CraftBukkit start - providable position
+        int i = createPosition.getX();
+        int j = createPosition.getY();
+        int k = createPosition.getZ();
+        // CraftBukkit end
         int l = i;
         int i1 = j;
         int j1 = k;
@@ -88,11 +110,11 @@
         double d3;
         double d4;
 
-        for (i2 = i - 16; i2 <= i + 16; ++i2) {
-            d1 = (double) i2 + 0.5D - entity.locX();
+        for (i2 = i - createRadius; i2 <= i + createRadius; ++i2) { // CraftBukkit - createRadius
+            d1 = (double) i2 + 0.5D - createPosition.getX(); // CraftBukkit - providable position
 
-            for (j2 = k - 16; j2 <= k + 16; ++j2) {
-                d2 = (double) j2 + 0.5D - entity.locZ();
+            for (j2 = k - createRadius; j2 <= k + createRadius; ++j2) { // CraftBukkit - createRadius
+                d2 = (double) j2 + 0.5D - createPosition.getZ(); // CraftBukkit - providable position
 
                 label257:
                 for (k2 = this.world.getHeight() - 1; k2 >= 0; --k2) {
@@ -140,11 +162,11 @@
         }
 
         if (d0 < 0.0D) {
-            for (i2 = i - 16; i2 <= i + 16; ++i2) {
-                d1 = (double) i2 + 0.5D - entity.locX();
+            for (i2 = i - createRadius; i2 <= i + createRadius; ++i2) { // CraftBukkit - createRadius
+                d1 = (double) i2 + 0.5D - createPosition.getX(); // CraftBukkit - providable position
 
-                for (j2 = k - 16; j2 <= k + 16; ++j2) {
-                    d2 = (double) j2 + 0.5D - entity.locZ();
+                for (j2 = k - createRadius; j2 <= k + createRadius; ++j2) { // CraftBukkit - createRadius
+                    d2 = (double) j2 + 0.5D - createPosition.getZ(); // CraftBukkit - providable position
 
                     label205:
                     for (k2 = this.world.getHeight() - 1; k2 >= 0; --k2) {
@@ -197,6 +219,7 @@
             l5 = -l5;
         }
 
+        org.bukkit.craftbukkit.util.BlockStateListPopulator blockList = new org.bukkit.craftbukkit.util.BlockStateListPopulator(this.world); // CraftBukkit - Use BlockStateListPopulator
         if (d0 < 0.0D) {
             i1 = MathHelper.clamp(i1, 70, this.world.getHeight() - 10);
             j5 = i1;
@@ -210,7 +233,7 @@
                         boolean flag1 = l2 < 0;
 
                         blockposition_mutableblockposition.d(j3, l3, i4);
-                        this.world.setTypeUpdate(blockposition_mutableblockposition, flag1 ? Blocks.OBSIDIAN.getBlockData() : Blocks.AIR.getBlockData());
+                        blockList.setTypeAndData(blockposition_mutableblockposition, flag1 ? Blocks.OBSIDIAN.getBlockData() : Blocks.AIR.getBlockData(), 3); // CraftBukkit
                     }
                 }
             }
@@ -220,7 +243,7 @@
             for (i3 = -1; i3 < 4; ++i3) {
                 if (k2 == -1 || k2 == 2 || i3 == -1 || i3 == 3) {
                     blockposition_mutableblockposition.d(i5 + k2 * k5, j5 + i3, j2 + k2 * l5);
-                    this.world.setTypeAndData(blockposition_mutableblockposition, Blocks.OBSIDIAN.getBlockData(), 3);
+                    blockList.setTypeAndData(blockposition_mutableblockposition, Blocks.OBSIDIAN.getBlockData(), 3); // CraftBukkit
                 }
             }
         }
@@ -230,10 +253,19 @@
         for (i3 = 0; i3 < 2; ++i3) {
             for (l2 = 0; l2 < 3; ++l2) {
                 blockposition_mutableblockposition.d(i5 + i3 * k5, j5 + l2, j2 + i3 * l5);
-                this.world.setTypeAndData(blockposition_mutableblockposition, iblockdata, 18);
+                blockList.setTypeAndData(blockposition_mutableblockposition, iblockdata, 18); // CraftBukkit
             }
         }
 
+        // CraftBukkit start
+        org.bukkit.World bworld = this.world.getWorld();
+        org.bukkit.event.world.PortalCreateEvent event = new org.bukkit.event.world.PortalCreateEvent((java.util.List<org.bukkit.block.BlockState>) (java.util.List) blockList.getList(), bworld, entity.getBukkitEntity(), org.bukkit.event.world.PortalCreateEvent.CreateReason.NETHER_PAIR);
+
+        this.world.getServer().getPluginManager().callEvent(event);
+        if (!event.isCancelled()) {
+            blockList.updateList();
+        }
+        // CraftBukkit end
         return true;
     }
 }