more list fetchers.

sdk/lists_relay.go

@@ -0,0 +1,72 @@
+package sdk
+
+import (
+	"context"
+
+	"github.com/nbd-wtf/go-nostr"
+)
+
+type Relay struct {
+	URL    string
+	Inbox  bool
+	Outbox bool
+}
+
+func (r Relay) Value() string { return r.URL }
+
+type RelayURL string
+
+func (r RelayURL) Value() string { return string(r) }
+
+func (sys *System) FetchRelayList(ctx context.Context, pubkey string) GenericList[Relay] {
+	ml, _ := fetchGenericList(sys, ctx, pubkey, 10002, kind_10002, parseRelayFromKind10002, sys.RelayListCache, false)
+	return ml
+}
+
+func (sys *System) FetchBlockedRelayList(ctx context.Context, pubkey string) GenericList[RelayURL] {
+	ml, _ := fetchGenericList(sys, ctx, pubkey, 10006, kind_10006, parseRelayURL, sys.BlockedRelayListCache, false)
+	return ml
+}
+
+func (sys *System) FetchSearchRelayList(ctx context.Context, pubkey string) GenericList[RelayURL] {
+	ml, _ := fetchGenericList(sys, ctx, pubkey, 10007, kind_10007, parseRelayURL, sys.SearchRelayListCache, false)
+	return ml
+}
+
+func parseRelayFromKind10002(tag nostr.Tag) (rl Relay, ok bool) {
+	if u := tag.Value(); u != "" && tag[0] == "r" {
+		if !nostr.IsValidRelayURL(u) {
+			return rl, false
+		}
+		u := nostr.NormalizeURL(u)
+
+		relay := Relay{
+			URL: u,
+		}
+
+		if len(tag) == 2 {
+			relay.Inbox = true
+			relay.Outbox = true
+		} else if tag[2] == "write" {
+			relay.Outbox = true
+		} else if tag[2] == "read" {
+			relay.Inbox = true
+		}
+
+		return relay, true
+	}
+
+	return rl, false
+}
+
+func parseRelayURL(tag nostr.Tag) (rl RelayURL, ok bool) {
+	if u := tag.Value(); u != "" && tag[0] == "relay" {
+		if !nostr.IsValidRelayURL(u) {
+			return rl, false
+		}
+		u := nostr.NormalizeURL(u)
+		return RelayURL(u), true
+	}
+
+	return rl, false
+}