From e5595d34be546a99d5594eb0af185cd4119f4c88 Mon Sep 17 00:00:00 2001
From: Alex Gleason <alex@alexgleason.me>
Date: Sat, 18 May 2024 17:08:30 -0500
Subject: [PATCH] Strip imeta links from the end of the content

---
 src/utils/note.ts              | 28 +++++++++++++++++++++++++++-
 src/views/mastodon/statuses.ts |  4 ++--
 2 files changed, 29 insertions(+), 3 deletions(-)

diff --git a/src/utils/note.ts b/src/utils/note.ts
index 20cb83a..03da2de 100644
--- a/src/utils/note.ts
+++ b/src/utils/note.ts
@@ -57,6 +57,32 @@ function parseNoteContent(content: string): ParsedNoteContent {
   };
 }
 
+/** Remove imeta links. */
+function stripimeta(content: string, tags: string[][]): string {
+  const imeta = tags.filter(([name]) => name === 'imeta');
+
+  if (!imeta.length) {
+    return content;
+  }
+
+  const urls = new Set(
+    imeta.map(([, ...values]) => values.map((v) => v.split(' ')).find(([name]) => name === 'url')?.[1]),
+  );
+
+  const lines = content.split('\n').reverse();
+
+  for (let i = 0; i < lines.length; i++) {
+    const line = lines[i];
+    if (line === '' || urls.has(line)) {
+      lines.splice(i, 1);
+    } else {
+      break;
+    }
+  }
+
+  return lines.reverse().join('\n');
+}
+
 /** Returns a matrix of tags. Each item is a list of NIP-94 tags representing a file. */
 function getMediaLinks(links: Pick<Link, 'href'>[]): string[][][] {
   return links.reduce<string[][][]>((acc, link) => {
@@ -93,4 +119,4 @@ function getDecodedPubkey(decoded: nip19.DecodeResult): string | undefined {
   }
 }
 
-export { getMediaLinks, parseNoteContent };
+export { getMediaLinks, parseNoteContent, stripimeta };
diff --git a/src/views/mastodon/statuses.ts b/src/views/mastodon/statuses.ts
index c707ebb..a06aac2 100644
--- a/src/views/mastodon/statuses.ts
+++ b/src/views/mastodon/statuses.ts
@@ -7,7 +7,7 @@ import { type DittoEvent } from '@/interfaces/DittoEvent.ts';
 import { Storages } from '@/storages.ts';
 import { findReplyTag } from '@/tags.ts';
 import { nostrDate } from '@/utils.ts';
-import { getMediaLinks, parseNoteContent } from '@/utils/note.ts';
+import { getMediaLinks, parseNoteContent, stripimeta } from '@/utils/note.ts';
 import { unfurlCardCached } from '@/utils/unfurl.ts';
 import { accountFromPubkey, renderAccount } from '@/views/mastodon/accounts.ts';
 import { renderAttachment } from '@/views/mastodon/attachments.ts';
@@ -46,7 +46,7 @@ async function renderStatus(event: DittoEvent, opts: RenderStatusOpts): Promise<
     [{ kinds: [0], authors: mentionedPubkeys, limit: mentionedPubkeys.length }],
   );
 
-  const { html, links, firstUrl } = parseNoteContent(event.content);
+  const { html, links, firstUrl } = parseNoteContent(stripimeta(event.content, event.tags));
 
   const [mentions, card, relatedEvents] = await Promise
     .all([