95 lines
2.0 KiB
Go
95 lines
2.0 KiB
Go
package khatru
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import (
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"context"
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"errors"
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"fmt"
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"strconv"
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"strings"
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"fiatjaf.com/nostr"
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)
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var (
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ErrNothingToDelete = errors.New("blocked: nothing to delete")
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ErrNotAuthor = errors.New("blocked: you are not the author of this event")
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)
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// event deletion -- nip09
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func (rl *Relay) handleDeleteRequest(ctx context.Context, evt nostr.Event) error {
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if nil == rl.QueryStored || nil == rl.DeleteEvent {
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// if we don't have a way to query or to delete that means we won't delete anything
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return ErrNothingToDelete
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}
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haveDeletedSomething := false
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for _, tag := range evt.Tags {
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if len(tag) >= 2 {
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var f nostr.Filter
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switch tag[0] {
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case "e":
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id, err := nostr.IDFromHex(tag[1])
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if err != nil {
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return fmt.Errorf("invalid 'e' tag '%s': %w", tag[1], err)
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}
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f = nostr.Filter{IDs: []nostr.ID{id}}
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case "a":
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spl := strings.SplitN(tag[1], ":", 3)
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if len(spl) != 3 {
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continue
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}
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kind, err := strconv.Atoi(spl[0])
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if err != nil {
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continue
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}
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author, err := nostr.PubKeyFromHex(spl[1])
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if err != nil {
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continue
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}
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identifier := spl[2]
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f = nostr.Filter{
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Kinds: []nostr.Kind{nostr.Kind(kind)},
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Authors: []nostr.PubKey{author},
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Tags: nostr.TagMap{"d": []string{identifier}},
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Until: evt.CreatedAt,
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}
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default:
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continue
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}
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ctx := context.WithValue(ctx, internalCallKey, struct{}{})
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for target := range rl.QueryStored(ctx, f) {
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// got the event, now check if the user can delete it
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if target.PubKey == evt.PubKey {
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// delete it
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if err := rl.DeleteEvent(ctx, target.ID); err != nil {
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return err
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}
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// if it was tracked to be expired that is not needed anymore
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if rl.expirationManager != nil {
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rl.expirationManager.removeEvent(target.ID)
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}
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haveDeletedSomething = true
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} else {
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// fail and stop here
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return ErrNotAuthor
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}
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// don't try to query this same event again
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break
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}
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}
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}
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if haveDeletedSomething {
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return nil
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}
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return ErrNothingToDelete
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}
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