51 lines
1.0 KiB
Go
51 lines
1.0 KiB
Go
package lmdbn
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import (
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"context"
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"encoding/hex"
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"github.com/bmatsuo/lmdb-go/lmdb"
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"github.com/nbd-wtf/go-nostr"
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"github.com/nbd-wtf/go-nostr/nson"
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)
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func (b *LMDBBackend) DeleteEvent(ctx context.Context, evt *nostr.Event) error {
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err := b.lmdbEnv.Update(func(txn *lmdb.Txn) error {
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id, _ := hex.DecodeString(evt.ID)
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idx, err := txn.Get(b.indexId, id)
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if operr, ok := err.(*lmdb.OpError); ok && operr.Errno == lmdb.NotFound {
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// we already do not have this
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return nil
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}
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if err != nil {
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return err
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}
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// fetch the event
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val, err := txn.Get(b.rawEventStore, idx)
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if err != nil {
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return err
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}
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evt := &nostr.Event{}
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if err := nson.Unmarshal(string(val), evt); err != nil {
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return err
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}
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// calculate all index keys we have for this event and delete them
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for _, k := range b.getIndexKeysForEvent(evt) {
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if err := txn.Del(k.dbi, k.key, nil); err != nil {
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return err
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}
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}
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// delete the raw event
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return txn.Del(b.rawEventStore, idx, nil)
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})
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if err != nil {
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return err
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}
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return nil
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}
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