From 13b2a17e6f6ed1697c51a6650874313a6da4aa8f Mon Sep 17 00:00:00 2001
From: Adam Soltys <adam@coinos.io>
Date: Sat, 7 Mar 2026 08:41:23 -0800
Subject: render decrypted images

---
 src/components/ChatMessage.svelte | 109 ++++++++++++++++++++++++++++++++++----
 1 file changed, 98 insertions(+), 11 deletions(-)

(limited to 'src/components')

diff --git a/src/components/ChatMessage.svelte b/src/components/ChatMessage.svelte
index aeaac210..d28aefc4 100644
--- a/src/components/ChatMessage.svelte
+++ b/src/components/ChatMessage.svelte
@@ -1,14 +1,50 @@
 <script lang="ts">
   import { parseContent, isImage, isVideo, isAudio } from "$lib/parseContent";
 
-  let { content, tags = [] }: { content: string; tags?: any[] } = $props();
+  let {
+    content,
+    tags = [],
+    decryptMedia,
+  }: {
+    content: string;
+    tags?: any[];
+    decryptMedia?: (tag: string[]) => Promise<string>;
+  } = $props();
 
-  // Extract image URLs from imeta tags (NIP-92)
-  let imageUrls: string[] = $derived(
+  // Detect MIP-04 encrypted media (has "v mip04-v2" field)
+  let encryptedMedia = $derived(
+    tags.filter(
+      (t: string[]) =>
+        t[0] === "imeta" &&
+        t.some((v) => v === "v mip04-v2") &&
+        t.some((v) => v.startsWith("url ")),
+    ),
+  );
+
+  // Plain (unencrypted) media from imeta tags
+  let plainMedia = $derived(
     tags
-      .filter((t: string[]) => t[0] === "imeta" && t.some((v) => v.startsWith("m image/")))
-      .map((t: string[]) => t.find((v) => v.startsWith("url "))?.slice(4))
-      .filter((url): url is string => !!url),
+      .filter(
+        (t: string[]) =>
+          t[0] === "imeta" &&
+          !t.some((v) => v === "v mip04-v2") &&
+          t.some((v) => v.startsWith("url ")),
+      )
+      .map((t: string[]) => ({
+        url: t.find((v) => v.startsWith("url "))?.slice(4) || "",
+        mime: t.find((v) => v.startsWith("m "))?.slice(2) || "",
+      }))
+      .filter((m) => m.url),
+  );
+
+  // Set of all imeta URLs to suppress duplicate link rendering
+  let imetaUrls = $derived(
+    new Set([
+      ...plainMedia.map((m) => m.url),
+      ...encryptedMedia
+        .map((t: string[]) => t.find((v) => v.startsWith("url "))?.slice(4) || "")
+        .filter(Boolean),
+    ]),
   );
 
   let parts = $derived(parseContent({ content, tags }));
@@ -28,12 +64,47 @@
     } catch {}
     return `@${pubkey.slice(0, 8)}...`;
   };
+
+  const getMime = (tag: string[]): string =>
+    tag.find((v) => v.startsWith("m "))?.slice(2) || "image/jpeg";
 </script>
 
-{#each imageUrls as url}
-  <a href={url} target="_blank" rel="noopener noreferrer">
-    <img src={url} alt="" class="chat-img" />
-  </a>
+{#each encryptedMedia as tag}
+  {#if decryptMedia}
+    {@const mime = getMime(tag)}
+    {#await decryptMedia(tag)}
+      <div class="chat-img-placeholder"></div>
+    {:then blobUrl}
+      {#if mime.startsWith("image/")}
+        <a href={blobUrl} target="_blank" rel="noopener noreferrer">
+          <img src={blobUrl} alt="" class="chat-img" />
+        </a>
+      {:else if mime.startsWith("video/")}
+        <!-- svelte-ignore a11y_media_has_caption -->
+        <video src={blobUrl} controls class="chat-video"></video>
+      {:else if mime.startsWith("audio/")}
+        <audio src={blobUrl} controls></audio>
+      {/if}
+    {:catch}
+      {@const url = tag.find((v) => v.startsWith("url "))?.slice(4) || ""}
+      <a href={url} target="_blank" rel="noopener noreferrer" class="chat-link">{truncUrl(url)}</a>
+    {/await}
+  {/if}
+{/each}
+
+{#each plainMedia as media}
+  {#if media.mime.startsWith("image/")}
+    <a href={media.url} target="_blank" rel="noopener noreferrer">
+      <img src={media.url} alt="" class="chat-img" />
+    </a>
+  {:else if media.mime.startsWith("video/")}
+    <!-- svelte-ignore a11y_media_has_caption -->
+    <video src={media.url} controls class="chat-video"></video>
+  {:else if media.mime.startsWith("audio/")}
+    <audio src={media.url} controls></audio>
+  {:else}
+    <a href={media.url} target="_blank" rel="noopener noreferrer" class="chat-link">{truncUrl(media.url)}</a>
+  {/if}
 {/each}
 
 {#each parts as { type, value }}
@@ -42,7 +113,9 @@
   {:else if type === "newline"}
     <br />
   {:else if type === "link"}
-    {#if isImage(value.url)}
+    {#if imetaUrls.has(value.url)}
+      <!-- Already rendered as imeta media above -->
+    {:else if isImage(value.url)}
       <a href={value.url} target="_blank" rel="noopener noreferrer">
         <img src={value.url} alt="" class="chat-img" />
       </a>
@@ -78,6 +151,20 @@
     margin: 4px 0;
   }
 
+  .chat-img-placeholder {
+    width: 200px;
+    height: 150px;
+    border-radius: 8px;
+    margin: 4px 0;
+    background: var(--bg-secondary, #e5e7eb);
+    animation: pulse 1.5s ease-in-out infinite;
+  }
+
+  @keyframes pulse {
+    0%, 100% { opacity: 0.5; }
+    50% { opacity: 0.8; }
+  }
+
   .chat-video {
     max-width: 100%;
     border-radius: 8px;
-- 
cgit v1.2.3