82 lines
1.7 KiB
Go
82 lines
1.7 KiB
Go
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package khatru
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import (
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"context"
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"fmt"
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"strconv"
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"strings"
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"github.com/nbd-wtf/go-nostr"
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)
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func (rl *Relay) handleDeleteRequest(ctx context.Context, evt *nostr.Event) error {
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// event deletion -- nip09
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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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f = nostr.Filter{IDs: []string{tag[1]}}
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case "a":
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spl := strings.Split(tag[1], ":")
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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 := spl[1]
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identifier := spl[2]
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f = nostr.Filter{
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Kinds: []int{kind},
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Authors: []string{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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for _, query := range rl.QueryEvents {
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ch, err := query(ctx, f)
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if err != nil {
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continue
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}
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target := <-ch
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if target == nil {
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continue
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}
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// got the event, now check if the user can delete it
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acceptDeletion := target.PubKey == evt.PubKey
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var msg string
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if !acceptDeletion {
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msg = "you are not the author of this event"
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}
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// but if we have a function to overwrite this outcome, use that instead
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for _, odo := range rl.OverwriteDeletionOutcome {
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acceptDeletion, msg = odo(ctx, target, evt)
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}
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if acceptDeletion {
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// delete it
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for _, del := range rl.DeleteEvent {
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if err := del(ctx, target); err != nil {
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return err
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}
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}
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} else {
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// fail and stop here
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return fmt.Errorf("blocked: %s", msg)
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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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return nil
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}
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