player and dimension loader with ecs system

server/world/world.go

@@ -0,0 +1,51 @@
+package world
+
+import (
+	_ "embed"
+	"github.com/Tnze/go-mc/server"
+	"io"
+	"unsafe"
+
+	"github.com/Tnze/go-mc/nbt"
+	pk "github.com/Tnze/go-mc/net/packet"
+	"github.com/Tnze/go-mc/server/ecs"
+)
+
+//go:embed DimensionCodec.snbt
+var dimensionCodecSNBT nbt.StringifiedMessage
+
+//go:embed Dimension.snbt
+var dimensionSNBT nbt.StringifiedMessage
+
+type Dimension struct {
+	storage
+	Name string
+}
+
+type DimensionList struct {
+	Dims                  []ecs.Index
+	DimNames              []string
+	DimCodecSNBT, DimSNBT nbt.StringifiedMessage
+}
+
+func (d *DimensionList) WriteTo(w io.Writer) (n int64, err error) {
+	return pk.Array(*(*[]pk.Identifier)(unsafe.Pointer(&d.DimNames))).WriteTo(w)
+}
+
+func (d *DimensionList) Find(dim string) (ecs.Index, bool) {
+	for i, v := range d.DimNames {
+		if v == dim {
+			return d.Dims[i], true
+		}
+	}
+	return 0, false
+}
+
+func NewDimensionManager(g *server.Game) *DimensionList {
+	return ecs.SetResource(g.World, DimensionList{
+		Dims:         nil,
+		DimNames:     nil,
+		DimCodecSNBT: dimensionCodecSNBT,
+		DimSNBT:      dimensionSNBT,
+	})
+}