From 770f44019a12f66159bb6bd536e9efdf26250cc4 Mon Sep 17 00:00:00 2001
From: Gabriel Gomes <gabrielsousagomes@hotmail.com>
Date: Sat, 29 Mar 2025 22:02:22 +0000
Subject: [PATCH] changed metadata output

---
 packages/excalidraw/data/image.ts | 22 +++++++++++++++++++---
 packages/excalidraw/global.d.ts   |  2 ++
 yarn.lock                         | 12 ++++++++++++
 3 files changed, 33 insertions(+), 3 deletions(-)

diff --git a/packages/excalidraw/data/image.ts b/packages/excalidraw/data/image.ts
index 941c5fcdd..070889fdf 100644
--- a/packages/excalidraw/data/image.ts
+++ b/packages/excalidraw/data/image.ts
@@ -14,14 +14,30 @@ import { encode, decode } from "./encode";
 
 export const getMetadataChunk = async (
   blob: Blob,
-): Promise<{ keyword: string; text: string } | null> => {
+): Promise<{ 
+    keyword: string; 
+    text: string;
+    compressionFlag?: boolean;
+    compressionMethod?: number;
+    languageTag?: string;
+    translatedKeyword?: string;
+  } | null> => {
   const chunks = decodePng(new Uint8Array(await blobToArrayBuffer(blob)));
   
   const iTXtChunk = chunks.find((chunk) => chunk.name === "iTXt");
+
   if (iTXtChunk) {
     try {
       const decoded = decodeITXt(iTXtChunk.data);
-      return { keyword: decoded.keyword, text: decoded.text };
+      console.log("Decoded iTXt chunk:", decoded);
+      return { 
+        keyword: decoded.keyword, 
+        text: decoded.text,
+        compressionFlag: decoded.compressed,
+        compressionMethod: decoded.compressedMethod,
+        languageTag: decoded.language || "",
+        translatedKeyword: decoded.translated || ""
+      };
     } catch (error) {
       console.error("Failed to decode iTXt chunk:", error);
     }
@@ -45,7 +61,7 @@ export const encodePngMetadata = async ({
   useITXt?: boolean;
 }) => {
   const chunks = decodePng(new Uint8Array(await blobToArrayBuffer(blob)));
-  
+  debugger;
   const filteredChunks = chunks.filter(
     (chunk) => 
       !(chunk.name === "tEXt" && 
diff --git a/packages/excalidraw/global.d.ts b/packages/excalidraw/global.d.ts
index e6ed123dc..8688d354b 100644
--- a/packages/excalidraw/global.d.ts
+++ b/packages/excalidraw/global.d.ts
@@ -51,6 +51,8 @@ declare module "png-chunk-itxt" {
   function decode(data: Uint8Array): { 
     keyword: string; 
     text: string;
+    compressed?: boolean;
+    compressedMethod?: number;
     language?: string;
     translated?: string;
   };
diff --git a/yarn.lock b/yarn.lock
index ccd0827fb..30a203b2b 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -3882,6 +3882,11 @@ binary-extensions@^2.0.0:
   resolved "https://registry.yarnpkg.com/binary-extensions/-/binary-extensions-2.3.0.tgz#f6e14a97858d327252200242d4ccfe522c445522"
   integrity sha512-Ceh+7ox5qe7LJuLHoY0feh3pHuUDHAcRUeyL2VYghZwfpkNIy/+8Ocg0a3UuSoYzavmylwuLWQOf3hl0jjMMIw==
 
+binary-parser@^2.2.1:
+  version "2.2.1"
+  resolved "https://registry.yarnpkg.com/binary-parser/-/binary-parser-2.2.1.tgz#4edc6da2dc56db73fa5ba450dfe6382ede8294ce"
+  integrity sha512-5ATpz/uPDgq5GgEDxTB4ouXCde7q2lqAQlSdBRQVl/AJnxmQmhIfyxJx+0MGu//D5rHQifkfGbWWlaysG0o9NA==
+
 bl@^4.0.3:
   version "4.1.0"
   resolved "https://registry.yarnpkg.com/bl/-/bl-4.1.0.tgz#451535264182bec2fbbc83a62ab98cf11d9f7b3a"
@@ -7919,6 +7924,13 @@ pkg-dir@4.2.0:
   dependencies:
     find-up "^4.0.0"
 
+png-chunk-itxt@1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/png-chunk-itxt/-/png-chunk-itxt-1.0.0.tgz#4652547b7c88d512337599e422b7431f2c234355"
+  integrity sha512-/1gTTBlIBUL47FS1wXI5oW5zidHge1Lwn+w4WNsnTc6wu1i82l63hwz0mgw1x2eYFH4iYkHkmKH0FHoHYMmjig==
+  dependencies:
+    binary-parser "^2.2.1"
+
 png-chunk-text@1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/png-chunk-text/-/png-chunk-text-1.0.0.tgz#1c6006d8e34ba471d38e1c9c54b3f53e1085e18f"