player and dimension loader with ecs system

server/world/pool.go

@@ -0,0 +1,74 @@
+package world
+
+import (
+	"fmt"
+	"path/filepath"
+
+	"github.com/Tnze/go-mc/level"
+	"github.com/Tnze/go-mc/save"
+	"github.com/Tnze/go-mc/save/region"
+)
+
+// TODO: Cache regions and chunks
+type storage struct {
+	regionDir string
+}
+
+func (s *storage) GetChunk(pos level.ChunkPos) (lc *level.Chunk, err error) {
+	filename := fmt.Sprintf("r.%d.%d.mca", pos.X>>5, pos.Z>>5)
+
+	var r *region.Region
+	r, err = region.Open(filepath.Join(s.regionDir, filename))
+	if err != nil {
+		return nil, err
+	}
+	defer func() {
+		err2 := r.Close()
+		if err == nil && err2 != nil {
+			err = err2
+		}
+	}()
+
+	sector, err := r.ReadSector(region.In(pos.X, pos.Z))
+	if err != nil {
+		return nil, err
+	}
+
+	var sc save.Chunk
+	err = sc.Load(sector)
+	if err != nil {
+		return nil, err
+	}
+
+	return level.ChunkFromSave(&sc)
+}
+
+func (s *storage) PutChunk(pos level.ChunkPos, c *level.Chunk) (err error) {
+	var sc save.Chunk
+	err = level.ChunkToSave(c, &sc)
+	if err != nil {
+		return
+	}
+
+	var data []byte
+	data, err = sc.Data(1)
+	if err != nil {
+		return
+	}
+
+	filename := fmt.Sprintf("r.%d.%d.mca", pos.X>>5, pos.Z>>5)
+	var r *region.Region
+	r, err = region.Open(filepath.Join(s.regionDir, filename))
+	if err != nil {
+		return err
+	}
+	defer func() {
+		err2 := r.Close()
+		if err == nil && err2 != nil {
+			err = err2
+		}
+	}()
+	x, z := region.In(pos.X, pos.Z)
+	err = r.WriteSector(x, z, data)
+	return
+}