70 lines
1.3 KiB
Go
70 lines
1.3 KiB
Go
package database
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import (
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"errors"
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"os"
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"strconv"
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"go.etcd.io/bbolt"
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)
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var (
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stonelandBucket = []byte("stoneland")
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stonesKey = []byte("stones")
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)
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type Database struct {
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db *bbolt.DB
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}
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func New(dbPath string) (*Database, error) {
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db, err := bbolt.Open(dbPath, os.ModePerm, bbolt.DefaultOptions)
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if err != nil {
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return nil, err
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}
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return &Database{
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db: db,
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}, db.Update(func(tx *bbolt.Tx) error {
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_, err := tx.CreateBucketIfNotExists(stonelandBucket)
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return err
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})
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}
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func (db *Database) Close() error {
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return db.db.Close()
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}
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func (db *Database) Rock(num int) error {
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return db.db.Update(func(tx *bbolt.Tx) error {
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bucket := tx.Bucket(stonelandBucket)
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if bucket == nil {
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return errors.New("bucket for stones was not created")
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}
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stones, err := db.rocks(tx)
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if err != nil {
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return err
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}
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stones += num
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return bucket.Put(stonesKey, []byte(strconv.Itoa(stones)))
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})
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}
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func (db *Database) Rocks() (count int, err error) {
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return count, db.db.View(func(tx *bbolt.Tx) error {
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count, err = db.rocks(tx)
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return err
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})
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}
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func (db *Database) rocks(tx *bbolt.Tx) (int, error) {
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bucket := tx.Bucket(stonelandBucket)
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if bucket == nil {
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return -1, errors.New("bucket for stones was not created")
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}
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stones := bucket.Get(stonesKey)
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if stones == nil {
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return 0, nil
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}
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return strconv.Atoi(string(stones))
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}
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