From 4eaf150adba0f431c3981b2fb049e31a5d883eec Mon Sep 17 00:00:00 2001
From: "xan.lol" <xan@xan.lol>
Date: Sun, 9 Aug 2026 18:52:23 -0700
Subject: [PATCH] redrafting posts with image galleries that WORKS

---
 src/lib/api/index.ts           |  6 ++++++
 src/lib/api/resolve-gallery.ts | 22 ++++++++++++++++++++++
 2 files changed, 28 insertions(+)
 create mode 100644 src/lib/api/resolve-gallery.ts

diff --git a/src/lib/api/index.ts b/src/lib/api/index.ts
index 3f1c99eb7..192ba3df4 100644
--- a/src/lib/api/index.ts
+++ b/src/lib/api/index.ts
@@ -48,6 +48,7 @@ import {
 import {IS_IOS, IS_WEB} from '#/env'
 import * as bsky from '#/types/bsky'
 import {createGIFDescription} from '../gif-alt-text'
+import {reuseGalleryImageBlob} from './resolve-gallery'
 import {uploadBlob} from './upload-blob'
 
 export {uploadBlob}
@@ -421,6 +422,11 @@ async function resolveMedia(
     onStateChange?.(t`Uploading images...`)
     const items: $Typed<AppBskyEmbedGallery.Image>[] = await Promise.all(
       imagesDraft.map(async (image, i) => {
+        const reusedImage = reuseGalleryImageBlob(image)
+        if (reusedImage) {
+          logger.debug(`Reusing existing blob for gallery image #${i}`)
+          return reusedImage
+        }
         logger.debug(`Compressing image #${i}`)
         const {path, width, height, mime} = await compressImage(
           image,
diff --git a/src/lib/api/resolve-gallery.ts b/src/lib/api/resolve-gallery.ts
new file mode 100644
index 000000000..0e178065b
--- /dev/null
+++ b/src/lib/api/resolve-gallery.ts
@@ -0,0 +1,22 @@
+import {type $Typed, type AppBskyEmbedGallery} from '@atproto/api'
+
+import {type ComposerImage} from '#/state/gallery'
+
+/** Reuses the original blob when an untouched gallery image is redrafted. */
+export function reuseGalleryImageBlob(
+  image: ComposerImage,
+): $Typed<AppBskyEmbedGallery.Image> | undefined {
+  if (!image.blobRef) {
+    return undefined
+  }
+
+  return {
+    $type: 'app.bsky.embed.gallery#image',
+    image: image.blobRef,
+    alt: image.alt,
+    aspectRatio: {
+      width: image.source.width,
+      height: image.source.height,
+    },
+  }
+}
-- 
2.51.2