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package app
import (
"encoding/binary"
"fmt"
log "github.com/sirupsen/logrus"
"github.com/prologic/bitcask"
)
// BitcaskStore ...
type BitcaskStore struct {
db *bitcask.Bitcask
}
// NewBitcaskStore ...
func NewBitcaskStore(path string, options ...bitcask.Option) (Store, error) {
db, err := bitcask.Open(path, options...)
if err != nil {
return nil, err
}
return &BitcaskStore{db: db}, nil
}
// Migrate ...
func (s *BitcaskStore) Migrate(collection, id string) error {
if s.db.Has([]byte(fmt.Sprintf("/views/%s/%s", collection, id))) {
oldViews, err := s.GetViews_(collection, id)
if err != nil {
err := fmt.Errorf("error getting old views for %s %s: %w", collection, id, err)
return err
}
buf := make([]byte, 8)
binary.BigEndian.PutUint64(buf, uint64(oldViews))
err = s.db.Put([]byte(fmt.Sprintf("/views/%s/%s", collection, id)), buf)
if err != nil {
err := fmt.Errorf("error storing new views for %s: %w", id, err)
return err
}
if err := s.db.Delete([]byte(fmt.Sprintf("/views/%s/%s", collection, id))); err != nil {
err := fmt.Errorf("error deleting old views for %s %s: %w", collection, id, err)
return err
}
}
return nil
}
// Close ...
func (s *BitcaskStore) Close() error {
return s.db.Close()
}
// GetViews_ ...
func (s *BitcaskStore) GetViews_(collection, id string) (int64, error) {
var views uint64
rawViews, err := s.db.Get([]byte(fmt.Sprintf("/views/%s/%s", collection, id)))
if err != nil {
if err != bitcask.ErrKeyNotFound {
err := fmt.Errorf("error getting views for %s %s: %w", collection, id, err)
log.Error(err)
return 0, err
}
} else {
views = binary.BigEndian.Uint64(rawViews)
}
return int64(views), nil
}
// IncView_ ...
func (s *BitcaskStore) IncView_(collection, id string) error {
views, err := s.GetViews_(collection, id)
if err != nil {
err := fmt.Errorf("error getting existing views for %s %s: %w", collection, id, err)
return err
}
buf := make([]byte, 8)
views++
binary.BigEndian.PutUint64(buf, uint64(views))
err = s.db.Put([]byte(fmt.Sprintf("/views/%s/%s", collection, id)), buf)
if err != nil {
err := fmt.Errorf("error storing updated views for %s %s: %w", collection, id, err)
return err
}
return nil
}
// GetViews ...
func (s *BitcaskStore) GetViews(id string) (int64, error) {
var views uint64
rawViews, err := s.db.Get([]byte(fmt.Sprintf("/views/%s", id)))
if err != nil {
if err != bitcask.ErrKeyNotFound {
err := fmt.Errorf("error getting views for %s: %w", id, err)
log.Error(err)
return 0, err
}
} else {
views = binary.BigEndian.Uint64(rawViews)
}
return int64(views), nil
}
// IncViews ...
func (s *BitcaskStore) IncViews(id string) error {
views, err := s.GetViews(id)
if err != nil {
err := fmt.Errorf("error getting existing views for %s: %w", id, err)
return err
}
buf := make([]byte, 8)
views++
binary.BigEndian.PutUint64(buf, uint64(views))
err = s.db.Put([]byte(fmt.Sprintf("/views/%s", id)), buf)
if err != nil {
err := fmt.Errorf("error storing updated views for %s: %w", id, err)
return err
}
return nil
}
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