handle nostr: links

README.md

@@ -57,7 +57,7 @@ I would recomend you use a browser extension like [Alby](https://getalby.com/) o
 - [x] [NIP-15](https://github.com/nostr-protocol/nips/blob/master/15.md): End of Stored Events Notice
 - [x] [NIP-19](https://github.com/nostr-protocol/nips/blob/master/19.md): bech32-encoded entities
 - [ ] [NIP-20](https://github.com/nostr-protocol/nips/blob/master/20.md): Command Results
-- [ ] [NIP-21](https://github.com/nostr-protocol/nips/blob/master/21.md): `nostr:` URL scheme
+- [x] [NIP-21](https://github.com/nostr-protocol/nips/blob/master/21.md): `nostr:` URL scheme
 - [x] [NIP-25](https://github.com/nostr-protocol/nips/blob/master/25.md): Reactions
 - [ ] [NIP-26](https://github.com/nostr-protocol/nips/blob/master/26.md): Delegated Event Signing
 - [ ] [NIP-33](https://github.com/nostr-protocol/nips/blob/master/33.md): Parameterized Replaceable Events
@@ -78,10 +78,8 @@ I would recomend you use a browser extension like [Alby](https://getalby.com/) o
 - add `client` tag to published events
 - Save note drafts and let users manage them
 - make app a valid web share target https://developer.chrome.com/articles/web-share-target/
-  - handle `nostr:` links
   - handle image share
 - implement NIP-56 and blocking
-- block notes based on content
 - allow user to select relay or following list when fetching replies (default to my relays + following?)
   - massive thread note1dapvuu8fl09yjtg2gyr2h6nypaffl2sq0aj5raz86463qk5kpyzqlxvtc3
 

src/app.tsx

@@ -30,6 +30,7 @@ const LoginNsecView = React.lazy(() => import("./views/login/nsec"));
 const UserZapsTab = React.lazy(() => import("./views/user/zaps"));
 const DirectMessagesView = React.lazy(() => import("./views/dm"));
 const DirectMessageChatView = React.lazy(() => import("./views/dm/chat"));
+const NostrLinkView = React.lazy(() => import("./views/link"));
 
 const RequireCurrentAccount = ({ children }: { children: JSX.Element }) => {
   let location = useLocation();
@@ -107,30 +108,13 @@ const router = createBrowserRouter([
         },
         element: <NoteView />,
       },
-      {
-        path: "settings",
-        element: <SettingsView />,
-      },
-      {
-        path: "relays",
-        element: <RelaysView />,
-      },
-      {
-        path: "notifications",
-        element: <NotificationsView />,
-      },
-      {
-        path: "dm",
-        element: <DirectMessagesView />,
-      },
-      {
-        path: "dm/:key",
-        element: <DirectMessageChatView />,
-      },
-      {
-        path: "profile",
-        element: <ProfileView />,
-      },
+      { path: "settings", element: <SettingsView /> },
+      { path: "relays", element: <RelaysView /> },
+      { path: "notifications", element: <NotificationsView /> },
+      { path: "dm", element: <DirectMessagesView /> },
+      { path: "dm/:key", element: <DirectMessageChatView /> },
+      { path: "profile", element: <ProfileView /> },
+      { path: "nostr-link", element: <NostrLinkView /> },
       {
         path: "",
         element: <HomeView />,

src/components/note/note-menu.tsx

@@ -9,14 +9,27 @@ import {
   ModalCloseButton,
 } from "@chakra-ui/react";
 import { useCopyToClipboard } from "react-use";
+import { nip19 } from "nostr-tools";
 
 import { Bech32Prefix, normalizeToBech32 } from "../../helpers/nip19";
 import { NostrEvent } from "../../types/nostr-event";
 import { MenuIconButton, MenuIconButtonProps } from "../menu-icon-button";
 
-import { ClipboardIcon, CodeIcon, LikeIcon } from "../icons";
+import { ClipboardIcon, CodeIcon, LikeIcon, ShareIcon } from "../icons";
 import { getReferences } from "../../helpers/nostr-event";
 import NoteReactionsModal from "./note-reactions-modal";
+import { getEventRelays } from "../../services/event-relays";
+import relayScoreboardService from "../../services/relay-scoreboard";
+
+function getShareLink(eventId: string) {
+  const relays = getEventRelays(eventId).value;
+  const ranked = relayScoreboardService.getRankedRelays(relays);
+  const onlyTwo = ranked.slice(0, 2);
+
+  if (onlyTwo.length > 0) {
+    return nip19.neventEncode({ id: eventId, relays: onlyTwo });
+  } else return nip19.noteEncode(eventId);
+}
 
 export const NoteMenu = ({ event, ...props }: { event: NostrEvent } & Omit<MenuIconButtonProps, "children">) => {
   const infoModal = useDisclosure();
@@ -30,6 +43,9 @@ export const NoteMenu = ({ event, ...props }: { event: NostrEvent } & Omit<MenuI
         <MenuItem onClick={reactionsModal.onOpen} icon={<LikeIcon />}>
           Reactions
         </MenuItem>
+        <MenuItem onClick={() => copyToClipboard("nostr:" + getShareLink(event.id))} icon={<ShareIcon />}>
+          Copy Share Link
+        </MenuItem>
         {noteId && (
           <MenuItem onClick={() => copyToClipboard(noteId)} icon={<ClipboardIcon />}>
             Copy Note ID

src/components/zap-modal.tsx

@@ -148,14 +148,14 @@ export default function ZapModal({
   const payWithApp = async () => {
     window.open("lightning:" + invoice);
 
-    window.addEventListener(
-      "focus",
-      () => {
+    const listener = () => {
+      if (document.visibilityState === "visible") {
         if (onPaid) onPaid();
         onClose();
-      },
-      { once: true }
-    );
+        document.removeEventListener("visibilitychange", listener);
+      }
+    };
+    document.addEventListener("visibilitychange", listener);
   };
 
   const handleClose = () => {

src/index.tsx

@@ -3,6 +3,14 @@ import { createRoot } from "react-dom/client";
 import { App } from "./app";
 import { Providers } from "./providers";
 
+// register nostr: protocol handler
+try {
+  navigator.registerProtocolHandler("web+nostr", new URL("/nostr-link?q=%s", location.origin).toString());
+} catch (e) {
+  console.log("Failed to register handler");
+  console.log(e);
+}
+
 const element = document.getElementById("root");
 if (!element) throw new Error("missing mount point");
 const root = createRoot(element);

src/views/link/index.tsx

@@ -0,0 +1,72 @@
+import { Alert, AlertIcon, AlertTitle, Spinner } from "@chakra-ui/react";
+import { Navigate, useSearchParams } from "react-router-dom";
+import { Kind, nip19 } from "nostr-tools";
+import { useUserMetadata } from "../../hooks/use-user-metadata";
+import useSingleEvent from "../../hooks/use-single-event";
+import { useReadRelayUrls } from "../../hooks/use-client-relays";
+import { EventPointer, ProfilePointer } from "nostr-tools/lib/nip19";
+
+export function NpubLinkHandler({ pubkey, relays }: { pubkey: string; relays?: string[] }) {
+  const readRelays = useReadRelayUrls(relays);
+  const metadata = useUserMetadata(pubkey, readRelays);
+  if (!metadata) return <Spinner />;
+  return <Navigate to={`/u/${pubkey}`} replace />;
+}
+
+export function NoteLinkHandler({ eventId, relays }: { eventId: string; relays?: string[] }) {
+  const readRelays = useReadRelayUrls(relays);
+  const { event, loading } = useSingleEvent(eventId, readRelays);
+  if (loading) return <Spinner />;
+
+  if (!event)
+    return (
+      <Alert status="error">
+        <AlertIcon />
+        <AlertTitle>Failed to find event</AlertTitle>
+      </Alert>
+    );
+
+  if (event.kind !== Kind.Text)
+    return (
+      <Alert status="error">
+        <AlertIcon />
+        <AlertTitle>Cant handle event kind {event.kind}</AlertTitle>
+      </Alert>
+    );
+
+  return <Navigate to={`/n/${eventId}`} replace />;
+}
+
+export default function NostrLinkView() {
+  const [searchParams] = useSearchParams();
+  const rawLink = searchParams.get("q");
+
+  if (!rawLink)
+    return (
+      <Alert status="warning">
+        <AlertIcon />
+        <AlertTitle>No link provided</AlertTitle>
+      </Alert>
+    );
+
+  const cleanLink = rawLink.replace(/(web\+)?nostr:/, "");
+  const decoded = nip19.decode(cleanLink);
+
+  if ((decoded.type = "npub")) return <NpubLinkHandler pubkey={decoded.data as string} />;
+  if (decoded.type === "nprofile") {
+    const data = decoded.data as ProfilePointer;
+    return <NpubLinkHandler pubkey={data.pubkey} relays={data.relays} />;
+  }
+  if (decoded.type === "note") return <NoteLinkHandler eventId={decoded.data as string} />;
+  if (decoded.type === "nevent") {
+    const data = decoded.data as EventPointer;
+    return <NoteLinkHandler eventId={data.id} relays={data.relays} />;
+  }
+
+  return (
+    <Alert status="warning">
+      <AlertIcon />
+      <AlertTitle>Unknown type "{decoded.type}"</AlertTitle>
+    </Alert>
+  );
+}

src/views/user/components/header.tsx

@@ -1,5 +1,8 @@
 import { Flex, Heading, SkeletonText, Text, Link, IconButton } from "@chakra-ui/react";
+import { nip19 } from "nostr-tools";
+import { useMemo } from "react";
 import { useNavigate, Link as RouterLink } from "react-router-dom";
+import { RelayMode } from "../../../classes/relay";
 import { CopyIconButton } from "../../../components/copy-icon-button";
 import { ChatIcon, ExternalLinkIcon, KeyIcon, SettingsIcon } from "../../../components/icons";
 import { QrIconButton } from "../../../components/qr-icon-button";
@@ -12,9 +15,23 @@ import { truncatedId } from "../../../helpers/nostr-event";
 import { fixWebsiteUrl, getUserDisplayName } from "../../../helpers/user-metadata";
 import { useCurrentAccount } from "../../../hooks/use-current-account";
 import { useIsMobile } from "../../../hooks/use-is-mobile";
+import useMergedUserRelays from "../../../hooks/use-merged-user-relays";
 import { useUserMetadata } from "../../../hooks/use-user-metadata";
+import relayScoreboardService from "../../../services/relay-scoreboard";
 import { UserProfileMenu } from "./user-profile-menu";
 
+function useUserShareLink(pubkey: string) {
+  const userRelays = useMergedUserRelays(pubkey);
+
+  return useMemo(() => {
+    const writeUrls = userRelays.filter((r) => r.mode & RelayMode.WRITE).map((r) => r.url);
+    const ranked = relayScoreboardService.getRankedRelays(writeUrls);
+    const onlyTwo = ranked.slice(0, 2);
+
+    return onlyTwo.length > 0 ? nip19.nprofileEncode({ pubkey, relays: onlyTwo }) : nip19.npubEncode(pubkey);
+  }, [userRelays]);
+}
+
 export default function Header({ pubkey }: { pubkey: string }) {
   const isMobile = useIsMobile();
   const navigate = useNavigate();
@@ -24,6 +41,8 @@ export default function Header({ pubkey }: { pubkey: string }) {
   const account = useCurrentAccount();
   const isSelf = pubkey === account.pubkey;
 
+  const shareLink = useUserShareLink(pubkey);
+
   return (
     <Flex direction="column" gap="2" px="2" pt="2">
       <Flex gap="4">
@@ -56,7 +75,7 @@ export default function Header({ pubkey }: { pubkey: string }) {
             <KeyIcon />
             <Text>{truncatedId(npub, 10)}</Text>
             <CopyIconButton text={npub} title="Copy npub" aria-label="Copy npub" size="xs" />
-            <QrIconButton content={"nostr:" + npub} title="Show QrCode" aria-label="Show QrCode" size="xs" />
+            <QrIconButton content={"nostr:" + shareLink} title="Show QrCode" aria-label="Show QrCode" size="xs" />
           </Flex>
         )}
         <Flex gap="2" ml="auto">