avoid unnecessary cloning and boxing while iterating

patches/api/0469-API-for-checking-sent-chunks.patch

@@ -0,0 +1,50 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Flo0 <flo.roma@web.de>
+Date: Mon, 8 Apr 2024 16:22:07 +0200
+Subject: [PATCH] API for checking sent chunks
+
+
+diff --git a/src/main/java/org/bukkit/entity/Player.java b/src/main/java/org/bukkit/entity/Player.java
+index c6cb4f17469a8f2e60dd3e28d41402851ce5fb21..9c64601a502a887eab111df41fc96cd2a2786bb7 100644
+--- a/src/main/java/org/bukkit/entity/Player.java
++++ b/src/main/java/org/bukkit/entity/Player.java
+@@ -3707,6 +3707,39 @@ public interface Player extends HumanEntity, Conversable, OfflinePlayer, PluginM
+     void resetIdleDuration();
+     // Paper end
+
++    // Paper start - Add chunk view API
++    /**
++     * Gets the set of chunk keys for all chunks that have been sent to the player.
++     *
++     * @return unmodifiable view of chunk keys
++     */
++    @NotNull java.util.Set<java.lang.Long> getSentChunkKeys();
++
++    /**
++     * Gets the set of chunks that have been sent to the player.
++     *
++     * @return unmodifiable set of chunks
++     */
++    @NotNull java.util.Set<org.bukkit.Chunk> getSentChunks();
++
++    /**
++     * Checks if the player has been sent a specific chunk.
++     *
++     * @param chunk the chunk to check
++     * @return true if the player has been sent the chunk, false otherwise
++     */
++    boolean isChunkSent(@NotNull org.bukkit.Chunk chunk);
++
++    /**
++     * Checks if the player has been sent a specific chunk.
++     * @see org.bukkit.Chunk#getChunkKey()
++     *
++     * @param chunkKey the chunk key to check
++     * @return true if the player has been sent the chunk, false otherwise
++     */
++    boolean isChunkKeySent(long chunkKey);
++    // Paper end
++
+     @NotNull
+     @Override
+     Spigot spigot();

patches/server/1055-API-for-checking-sent-chunks.patch

@@ -0,0 +1,69 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Flo0 <flo.roma@web.de>
+Date: Mon, 8 Apr 2024 16:43:16 +0200
+Subject: [PATCH] API for checking sent chunks
+
+
+diff --git a/src/main/java/io/papermc/paper/chunk/system/RegionizedPlayerChunkLoader.java b/src/main/java/io/papermc/paper/chunk/system/RegionizedPlayerChunkLoader.java
+index 1b090f1e79b996e52097afc49c1cec85936653e6..7355978db3b7cfbc7503d7c2738868fcf10f6bf2 100644
+--- a/src/main/java/io/papermc/paper/chunk/system/RegionizedPlayerChunkLoader.java
++++ b/src/main/java/io/papermc/paper/chunk/system/RegionizedPlayerChunkLoader.java
+@@ -1107,6 +1107,16 @@ public class RegionizedPlayerChunkLoader {
+
+             // now all tickets should be removed, which is all of our external state
+         }
++
++        // For external checks
++        public boolean isChunkSent(long chunkKey) {
++            return this.sentChunks.contains(chunkKey);
++        }
++
++        // For external checks
++        public it.unimi.dsi.fastutil.longs.LongSet getSentChunks() {
++            return it.unimi.dsi.fastutil.longs.LongSets.unmodifiable(this.sentChunks);
++        }
+     }
+
+     // TODO rebase into util patch
+diff --git a/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java b/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java
+index e77bf7f432387bdfa7f69d31b014e8cd254fd4ca..693c07f427ee4f1b3056c741bb0aba7c08201a55 100644
+--- a/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java
++++ b/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java
+@@ -3390,6 +3390,37 @@ public class CraftPlayer extends CraftHumanEntity implements Player {
+     }
+     // Paper end
+
++    // Paper start - Add chunk view API
++    @Override
++    public @NotNull Set<java.lang.Long> getSentChunkKeys() {
++        return this.getHandle().chunkLoader.getSentChunks();
++    }
++
++    @Override
++    public @NotNull Set<org.bukkit.Chunk> getSentChunks() {
++        it.unimi.dsi.fastutil.longs.LongSet chunkKeys = this.getHandle().chunkLoader.getSentChunks();
++        Set<org.bukkit.Chunk> chunks = new HashSet<>(2 * chunkKeys.size());
++
++        it.unimi.dsi.fastutil.longs.LongIterator iterator = chunkKeys.iterator();
++        while (iterator.hasNext()) {
++            long chunkKey = iterator.nextLong();
++            chunks.add(this.getWorld().getChunkAt(chunkKey, false));
++        }
++
++        return java.util.Collections.unmodifiableSet(chunks);
++    }
++
++    @Override
++    public boolean isChunkSent(@NotNull org.bukkit.Chunk chunk) {
++        return this.isChunkKeySent(chunk.getChunkKey());
++    }
++
++    @Override
++    public boolean isChunkKeySent(long chunkKey) {
++        return this.getHandle().chunkLoader.isChunkSent(chunkKey);
++    }
++    // Paper end
++
+     public Player.Spigot spigot()
+     {
+         return this.spigot;