more list fetchers.

sdk/lists_event.go

@@ -0,0 +1,67 @@
+package sdk
+
+import (
+	"context"
+	"strconv"
+	"strings"
+
+	"github.com/nbd-wtf/go-nostr"
+)
+
+type EventRef struct{ nostr.Pointer }
+
+func (e EventRef) Value() string { return e.Pointer.AsTagReference() }
+
+func (sys *System) FetchBookmarkList(ctx context.Context, pubkey string) GenericList[EventRef] {
+	ml, _ := fetchGenericList(sys, ctx, pubkey, 10003, kind_10003, parseEventRef, sys.BookmarkListCache, false)
+	return ml
+}
+
+func (sys *System) FetchPinList(ctx context.Context, pubkey string) GenericList[EventRef] {
+	ml, _ := fetchGenericList(sys, ctx, pubkey, 10001, kind_10001, parseEventRef, sys.PinListCache, false)
+	return ml
+}
+
+func parseEventRef(tag nostr.Tag) (evr EventRef, ok bool) {
+	if len(tag) < 2 {
+		return evr, false
+	}
+	switch tag[0] {
+	case "e":
+		if !nostr.IsValid32ByteHex(tag[1]) {
+			return evr, false
+		}
+		pointer := nostr.EventPointer{
+			ID: tag[1],
+		}
+		if len(tag) >= 3 {
+			pointer.Relays = []string{nostr.NormalizeURL(tag[2])}
+			if len(tag) >= 4 {
+				pointer.Author = tag[3]
+			}
+		}
+		evr.Pointer = pointer
+	case "a":
+		spl := strings.SplitN(tag[1], ":", 3)
+		if len(spl) != 3 || !nostr.IsValidPublicKey(spl[1]) {
+			return evr, false
+		}
+		pointer := nostr.EntityPointer{
+			PublicKey:  spl[1],
+			Identifier: spl[2],
+		}
+		if kind, err := strconv.Atoi(spl[0]); err != nil {
+			return evr, false
+		} else {
+			pointer.Kind = kind
+		}
+		if len(tag) >= 3 {
+			pointer.Relays = []string{nostr.NormalizeURL(tag[2])}
+		}
+		evr.Pointer = pointer
+	default:
+		return evr, false
+	}
+
+	return evr, false
+}