86 lines
1.5 KiB
Go
86 lines
1.5 KiB
Go
package main
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import (
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"time"
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badger "github.com/dgraph-io/badger/v3"
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)
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type Db struct {
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db *badger.DB
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}
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func NewDatabase() (*Db, error) {
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db, err := badger.Open(badger.DefaultOptions("./database"))
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if err != nil {
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return nil, err
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}
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return &Db{
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db: db,
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}, nil
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}
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type PrefixStore struct {
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db *badger.DB
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prefix ItemType
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}
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type ItemType string
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const (
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GenericItem ItemType = ""
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ImageItem ItemType = "images:"
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FileIDItem ItemType = "fileid:"
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)
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func (d *Db) Prefix(prefix ItemType) PrefixStore {
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return PrefixStore{
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db: d.db,
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prefix: prefix,
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}
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}
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func (d *PrefixStore) StoreItem(key string, input []byte) error {
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fullKey := string(d.prefix) + key
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return d.db.Update(func(txn *badger.Txn) error {
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e := badger.NewEntry([]byte(fullKey), input).WithTTL(time.Hour * 60 * 24 * 10)
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return txn.SetEntry(e)
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})
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}
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func (d *PrefixStore) ItemExists(key string) bool {
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exists := false
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fullKey := string(d.prefix) + key
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d.db.View(func(txn *badger.Txn) error {
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_, err := txn.Get([]byte(fullKey))
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if err == nil {
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exists = true
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}
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return err
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})
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return exists
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}
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func (d *PrefixStore) GetItem(key string) ([]byte, error) {
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var image []byte
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fullKey := string(d.prefix) + key
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err := d.db.View(func(txn *badger.Txn) error {
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result, err := txn.Get([]byte(fullKey))
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if err != nil {
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return err
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}
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return result.Value(func(val []byte) error {
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image = append(image, val...)
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return nil
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})
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})
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if err != nil {
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return nil, err
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}
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return image, nil
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}
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func (d *Db) Close() {
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d.db.Close()
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}
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