From 82956f3c692a0446603ea712843d08754bd08164 Mon Sep 17 00:00:00 2001
From: Kieran <kieran@harkin.me>
Date: Fri, 21 Apr 2023 23:46:22 +0100
Subject: [PATCH] feat: render nip94 from regular note reference

---
 packages/app/src/Element/MediaLink.tsx       | 66 ++++++++------------
 packages/app/src/Element/NostrFileHeader.tsx | 29 ++++++---
 packages/app/src/Element/Note.tsx            |  8 ++-
 packages/app/src/Element/RevealMedia.tsx     | 35 ++++++++++-
 packages/app/src/Util.ts                     | 14 ++++-
 5 files changed, 100 insertions(+), 52 deletions(-)

diff --git a/packages/app/src/Element/MediaLink.tsx b/packages/app/src/Element/MediaLink.tsx
index 978f52b7..9aecad0e 100644
--- a/packages/app/src/Element/MediaLink.tsx
+++ b/packages/app/src/Element/MediaLink.tsx
@@ -1,43 +1,31 @@
-import { FileExtensionRegex } from "Const";
 import { ProxyImg } from "Element/ProxyImg";
 
-export default function MediaLink({ link }: { link: string }) {
-  const url = new URL(link);
-  const extension = FileExtensionRegex.test(url.pathname.toLowerCase()) && RegExp.$1;
-  switch (extension) {
-    case "gif":
-    case "jpg":
-    case "jpeg":
-    case "jfif":
-    case "png":
-    case "bmp":
-    case "webp": {
-      return <ProxyImg key={url.toString()} src={url.toString()} />;
-    }
-    case "wav":
-    case "mp3":
-    case "ogg": {
-      return <audio key={url.toString()} src={url.toString()} controls />;
-    }
-    case "mp4":
-    case "mov":
-    case "mkv":
-    case "avi":
-    case "m4v":
-    case "webm": {
-      return <video key={url.toString()} src={url.toString()} controls />;
-    }
-    default:
-      return (
-        <a
-          key={url.toString()}
-          href={url.toString()}
-          onClick={e => e.stopPropagation()}
-          target="_blank"
-          rel="noreferrer"
-          className="ext">
-          {url.toString()}
-        </a>
-      );
+interface MediaElementProps {
+  mime: string;
+  url: string;
+  magnet?: string;
+  sha256?: string;
+  blurHash?: string;
+}
+
+export function MediaElement(props: MediaElementProps) {
+  if (props.mime.startsWith("image/")) {
+    return <ProxyImg key={props.url} src={props.url} />;
+  } else if (props.mime.startsWith("audio/")) {
+    return <audio key={props.url} src={props.url} controls />;
+  } else if (props.mime.startsWith("video/")) {
+    return <video key={props.url} src={props.url} controls />;
+  } else {
+    return (
+      <a
+        key={props.url}
+        href={props.url}
+        onClick={e => e.stopPropagation()}
+        target="_blank"
+        rel="noreferrer"
+        className="ext">
+        {props.url}
+      </a>
+    );
   }
 }
diff --git a/packages/app/src/Element/NostrFileHeader.tsx b/packages/app/src/Element/NostrFileHeader.tsx
index ba61a5dc..c63d5604 100644
--- a/packages/app/src/Element/NostrFileHeader.tsx
+++ b/packages/app/src/Element/NostrFileHeader.tsx
@@ -1,24 +1,39 @@
-import useEventFeed from "Feed/EventFeed";
-import { NostrLink } from "Util";
-import HyperText from "Element/HyperText";
 import { FormattedMessage } from "react-intl";
+import { RawEvent } from "@snort/nostr";
+
+import { findTag, NostrLink } from "Util";
+import useEventFeed from "Feed/EventFeed";
 import PageSpinner from "Element/PageSpinner";
+import Reveal from "Element/Reveal";
+import { MediaElement } from "Element/MediaLink";
 
 export default function NostrFileHeader({ link }: { link: NostrLink }) {
   const ev = useEventFeed(link);
 
   if (!ev.data) return <PageSpinner />;
+  return <NostrFileElement ev={ev.data} />;
+}
 
+export function NostrFileElement({ ev }: { ev: RawEvent }) {
   // assume image or embed which can be rendered by the hypertext kind
   // todo: make use of hash
   // todo: use magnet or other links if present
-  const u = ev.data?.tags.find(a => a[0] === "u")?.[1] ?? "";
-  if (u) {
-    return <HyperText link={u} creator={ev.data?.pubkey ?? ""} />;
+  const u = findTag(ev, "url");
+  const x = findTag(ev, "x");
+  const m = findTag(ev, "m");
+  const blurHash = findTag(ev, "blurhash");
+  const magnet = findTag(ev, "magnet");
+
+  if (u && m) {
+    return (
+      <Reveal message={<FormattedMessage defaultMessage="Click to load content from {link}" values={{ link: u }} />}>
+        <MediaElement mime={m} url={u} sha256={x} magnet={magnet} blurHash={blurHash} />
+      </Reveal>
+    );
   } else {
     return (
       <b className="error">
-        <FormattedMessage defaultMessage="Unknown file header: {name}" values={{ name: ev.data?.content }} />
+        <FormattedMessage defaultMessage="Unknown file header: {name}" values={{ name: ev.content }} />
       </b>
     );
   }
diff --git a/packages/app/src/Element/Note.tsx b/packages/app/src/Element/Note.tsx
index ac6cf6a1..7fe712d1 100644
--- a/packages/app/src/Element/Note.tsx
+++ b/packages/app/src/Element/Note.tsx
@@ -29,6 +29,7 @@ import Poll from "Element/Poll";
 import { EventExt } from "System/EventExt";
 import useLogin from "Hooks/useLogin";
 import { setBookmarked, setPinned } from "Login";
+import { NostrFileElement } from "Element/NostrFileHeader";
 
 import messages from "./messages";
 
@@ -72,8 +73,13 @@ const HiddenNote = ({ children }: { children: React.ReactNode }) => {
 };
 
 export default function Note(props: NoteProps) {
-  const navigate = useNavigate();
   const { data: ev, related, highlight, options: opt, ignoreModeration = false } = props;
+
+  if (ev.kind === EventKind.FileHeader) {
+    return <NostrFileElement ev={ev} />;
+  }
+
+  const navigate = useNavigate();
   const [showReactions, setShowReactions] = useState(false);
   const deletions = useMemo(() => getReactions(related, ev.id, EventKind.Deletion), [related]);
   const { isMuted } = useModeration();
diff --git a/packages/app/src/Element/RevealMedia.tsx b/packages/app/src/Element/RevealMedia.tsx
index 754b8b48..72ad233e 100644
--- a/packages/app/src/Element/RevealMedia.tsx
+++ b/packages/app/src/Element/RevealMedia.tsx
@@ -1,8 +1,9 @@
 import { FormattedMessage } from "react-intl";
 
-import MediaLink from "Element/MediaLink";
+import { FileExtensionRegex } from "Const";
 import Reveal from "Element/Reveal";
 import useLogin from "Hooks/useLogin";
+import { MediaElement } from "Element/MediaLink";
 
 interface RevealMediaProps {
   creator: string;
@@ -18,14 +19,42 @@ export default function RevealMedia(props: RevealMediaProps) {
   const hideMedia = pref.autoLoadMedia === "none" || (!isMine && hideNonFollows);
   const hostname = new URL(props.link).hostname;
 
+  const url = new URL(props.link);
+  const extension = FileExtensionRegex.test(url.pathname.toLowerCase()) && RegExp.$1;
+  const type = (() => {
+    switch (extension) {
+      case "gif":
+      case "jpg":
+      case "jpeg":
+      case "jfif":
+      case "png":
+      case "bmp":
+      case "webp":
+        return "image";
+      case "wav":
+      case "mp3":
+      case "ogg":
+        return "audio";
+      case "mp4":
+      case "mov":
+      case "mkv":
+      case "avi":
+      case "m4v":
+      case "webm":
+        return "video";
+      default:
+        return "unknown";
+    }
+  })();
+
   if (hideMedia) {
     return (
       <Reveal
         message={<FormattedMessage defaultMessage="Click to load content from {link}" values={{ link: hostname }} />}>
-        <MediaLink link={props.link} />
+        <MediaElement mime={`${type}/${extension}`} url={url.toString()} />
       </Reveal>
     );
   } else {
-    return <MediaLink link={props.link} />;
+    return <MediaElement mime={`${type}/${extension}`} url={url.toString()} />;
   }
 }
diff --git a/packages/app/src/Util.ts b/packages/app/src/Util.ts
index 8b115b96..588579b1 100644
--- a/packages/app/src/Util.ts
+++ b/packages/app/src/Util.ts
@@ -5,7 +5,17 @@ import { bytesToHex } from "@noble/hashes/utils";
 import { decode as invoiceDecode } from "light-bolt11-decoder";
 import { bech32 } from "bech32";
 import base32Decode from "base32-decode";
-import { HexKey, TaggedRawEvent, u256, EventKind, encodeTLV, NostrPrefix, decodeTLV, TLVEntryType } from "@snort/nostr";
+import {
+  HexKey,
+  TaggedRawEvent,
+  u256,
+  EventKind,
+  encodeTLV,
+  NostrPrefix,
+  decodeTLV,
+  TLVEntryType,
+  RawEvent,
+} from "@snort/nostr";
 import { MetadataCache } from "Cache";
 
 export const sha256 = (str: string | Uint8Array): u256 => {
@@ -466,7 +476,7 @@ export function chunks<T>(arr: T[], length: number) {
   return result;
 }
 
-export function findTag(e: TaggedRawEvent, tag: string) {
+export function findTag(e: RawEvent, tag: string) {
   const maybeTag = e.tags.find(evTag => {
     return evTag[0] === tag;
   });