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lmdb: new querying mechanism.

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This commit is contained in:
fiatjaf
2025-08-04 15:16:38 -03:00
parent 6bda63de17
commit 2750ae3751
7 changed files with 256 additions and 399 deletions
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15
eventstore/lmdb/replace.go
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@@ -2,6 +2,7 @@ package lmdb
import (
"fmt"
"iter"
"math"
"fiatjaf.com/nostr"
@@ -23,16 +24,20 @@ func (b *LMDBBackend) ReplaceEvent(evt nostr.Event) error {
}
// now we fetch the past events, whatever they are, delete them and then save the new
results, err := b.query(txn, filter, 10) // in theory limit could be just 1 and this should work
var yield_ func(nostr.Event) bool
var results iter.Seq[nostr.Event] = func(yield func(nostr.Event) bool) {
yield_ = yield
}
err := b.query(txn, filter, 10 /* in theory limit could be just 1 and this should work */, yield_)
if err != nil {
return fmt.Errorf("failed to query past events with %s: %w", filter, err)
}
shouldStore := true
for _, previous := range results {
if internal.IsOlder(previous.Event, evt) {
if err := b.delete(txn, previous.Event.ID); err != nil {
return fmt.Errorf("failed to delete event %s for replacing: %w", previous.Event.ID, err)
for previous := range results {
if internal.IsOlder(previous, evt) {
if err := b.delete(txn, previous.ID); err != nil {
return fmt.Errorf("failed to delete event %s for replacing: %w", previous.ID, err)
}
} else {
// there is a newer event already stored, so we won't store this