Update to v1.18.0

README.md

@@ -1,5 +1,5 @@
 # expresso
-> A library designed for hosting Minecraft: Java Edition listeners (currently for 1.17.1).
+> A library designed for hosting Minecraft: Java Edition listeners (currently for 1.18.0).
 
 ## Features
 - [X] Hosting listeners.

expresso/protocol/chunk_section.go

@@ -0,0 +1,47 @@
+package protocol
+
+// air is the ID of air in Minecraft.
+const air = 0
+
+// ChunkSection represents a modern implementation of a Minecraft chunk section.
+type ChunkSection struct {
+	// blockCount contains the amount of blocks that aren't air in this section.
+	blockCount int16
+	// chunkData contains the chunk data for this section.
+	chunkData *DataPalette
+	// biomeData contains the biome data for this section.
+	biomeData *DataPalette
+}
+
+// NewEmptyChunkSection creates a new empty chunk section.
+func NewEmptyChunkSection() *ChunkSection {
+	return &ChunkSection{
+		chunkData: NewEmptyChunkDataPalette(),
+		biomeData: NewBiomeDataPalette(4),
+	}
+}
+
+// GetBlockState returns the block state for the given block coordinates.
+func (c *ChunkSection) GetBlockState(pos BlockPos) (int32, error) {
+	return c.chunkData.GetBlockState(pos)
+}
+
+// SetBlockState sets the block state for the given block coordinates.
+func (c *ChunkSection) SetBlockState(pos BlockPos, state int32) error {
+	curr, err := c.chunkData.SetBlockState(pos, state)
+	if err != nil {
+		return err
+	}
+
+	if state != air && curr == air {
+		c.blockCount++
+	} else if state == air && curr != air {
+		c.blockCount--
+	}
+	return nil
+}
+
+// Empty returns true if this chunk section is empty.
+func (c *ChunkSection) Empty() bool {
+	return c.blockCount == 0
+}