From a819d35ac34009c59b89c2e0c63f785ceb6372f5 Mon Sep 17 00:00:00 2001
From: Vendicated <vendicated@riseup.net>
Date: Wed, 17 Dec 2025 23:34:52 +0100
Subject: [PATCH] ExpressionCloner: fix "Failed to resize asset below the
 maximum size" error

---
 src/plugins/expressionCloner/index.tsx | 36 ++++++++++++++++++--------
 1 file changed, 25 insertions(+), 11 deletions(-)

diff --git a/src/plugins/expressionCloner/index.tsx b/src/plugins/expressionCloner/index.tsx
index 11a596bb..9df5f10a 100644
--- a/src/plugins/expressionCloner/index.tsx
+++ b/src/plugins/expressionCloner/index.tsx
@@ -62,6 +62,9 @@ const PremiumTierStickerLimitMap = {
     3: 60
 } as const;
 
+const MAX_EMOJI_SIZE_BYTES = 256 * 1024;
+const MAX_STICKER_SIZE_BYTES = 512 * 1024;
+
 function getGuildMaxStickerSlots(guild: Guild) {
     if (guild.features.has("MORE_STICKERS") && guild.premiumTier === 3)
         return 120;
@@ -69,11 +72,11 @@ function getGuildMaxStickerSlots(guild: Guild) {
     return PremiumTierStickerLimitMap[guild.premiumTier] ?? PremiumTierStickerLimitMap[0];
 }
 
-function getUrl(data: Data) {
+function getUrl(data: Data, size: number) {
     if (data.t === "Emoji")
-        return `${location.protocol}//${window.GLOBAL_ENV.CDN_HOST}/emojis/${data.id}.${data.isAnimated ? "gif" : "png"}?size=4096&lossless=true`;
+        return `${location.protocol}//${window.GLOBAL_ENV.CDN_HOST}/emojis/${data.id}.${data.isAnimated ? "gif" : "png"}?size=${size}&lossless=true`;
 
-    return `${window.GLOBAL_ENV.MEDIA_PROXY_ENDPOINT}/stickers/${data.id}.${StickerExtMap[data.format_type]}?size=4096&lossless=true`;
+    return `${window.GLOBAL_ENV.MEDIA_PROXY_ENDPOINT}/stickers/${data.id}.${StickerExtMap[data.format_type]}?size=${size}&lossless=true`;
 }
 
 async function fetchSticker(id: string) {
@@ -97,7 +100,7 @@ async function cloneSticker(guildId: string, sticker: Sticker) {
     data.append("name", sticker.name);
     data.append("tags", sticker.tags);
     data.append("description", sticker.description);
-    data.append("file", await fetchBlob(getUrl(sticker)));
+    data.append("file", await fetchBlob(sticker));
 
     const { body } = await RestAPI.post({
         url: Constants.Endpoints.GUILD_STICKER_PACKS(guildId),
@@ -115,7 +118,7 @@ async function cloneSticker(guildId: string, sticker: Sticker) {
 }
 
 async function cloneEmoji(guildId: string, emoji: Emoji) {
-    const data = await fetchBlob(getUrl(emoji));
+    const data = await fetchBlob(emoji);
 
     const dataUrl = await new Promise<string>(resolve => {
         const reader = new FileReader();
@@ -161,12 +164,23 @@ function getGuildCandidates(data: Data) {
     }).sort((a, b) => a.name.localeCompare(b.name));
 }
 
-async function fetchBlob(url: string) {
-    const res = await fetch(url);
-    if (!res.ok)
-        throw new Error(`Failed to fetch ${url} - ${res.status}`);
+async function fetchBlob(data: Data) {
+    const MAX_SIZE = data.t === "Sticker"
+        ? MAX_STICKER_SIZE_BYTES
+        : MAX_EMOJI_SIZE_BYTES;
 
-    return res.blob();
+    for (let size = 4096; size >= 16; size /= 2) {
+        const url = getUrl(data, size);
+        const res = await fetch(url);
+        if (!res.ok)
+            throw new Error(`Failed to fetch ${url} - ${res.status}`);
+
+        const blob = await res.blob();
+        if (blob.size <= MAX_SIZE)
+            return blob;
+    }
+
+    throw new Error(`Failed to fetch ${data.t} within size limit of ${MAX_SIZE / 1000}kB`);
 }
 
 async function doClone(guildId: string, data: Sticker | Emoji) {
@@ -312,7 +326,7 @@ function buildMenuItem(type: "Emoji" | "Sticker", fetchData: () => Promisable<Om
                 openModalLazy(async () => {
                     const res = await fetchData();
                     const data = { t: type, ...res } as Sticker | Emoji;
-                    const url = getUrl(data);
+                    const url = getUrl(data, 128);
 
                     return modalProps => (
                         <ModalRoot {...modalProps}>