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level.go
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level.go
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package nbt
import (
"compress/gzip"
"errors"
"io"
)
var (
DataStructNotFound = errors.New("'Data' struct not found")
SpawnIntNotFound = errors.New("SpawnX/SpawnY/SpawnZ int32s not found")
)
type Level struct {
SpawnX, SpawnY, SpawnZ int
}
func ReadLevelDat(reader io.Reader) (*Level, error) {
r, err := gzip.NewReader(reader)
defer r.Close()
if err != nil {
return nil, err
}
return ReadLevelNbt(r)
}
func ReadLevelNbt(reader io.Reader) (*Level, error) {
root, err := Parse(reader)
if err != nil {
return nil, err
}
dataValue := root["Data"]
if dataValue == nil {
return nil, DataStructNotFound
}
data, ok := dataValue.(map[string]interface{})
if !ok {
return nil, DataStructNotFound
}
xval, xok := data["SpawnX"]
yval, yok := data["SpawnY"]
zval, zok := data["SpawnZ"]
if !xok || !yok || !zok {
return nil, SpawnIntNotFound
}
level := new(Level)
level.SpawnX, xok = xval.(int)
level.SpawnY, yok = yval.(int)
level.SpawnZ, zok = zval.(int)
if !xok || !yok || !zok {
return nil, SpawnIntNotFound
}
return level, nil
}